TY - GEN A1 - Prill, Robert A1 - Michel, Sven A1 - Kirschner, Jana A1 - Vorwerg, Susan A1 - Meisinger, Matthias A1 - Braun, Alexander A1 - Martin, Titus T1 - Concerning the evidence of therapeutic assessments: The determination of the range of motion of the knee joint extension T2 - The International Disabled People`s Day - XXIth edition - Life without Pain / Healthy Children - Healthy Europe N2 - A standardization lacking and the insufficient attention to quality criteria analysis when using therapeutic assessments lead to not loadable intervention results. Therefore these investigations must represent the basis for any uses of assessment. The goniometry is inevitable for the documentation of the mobility of joints. The kind of test procedures and their quality are however most contentious. The present study examined in a three-way blinded, randomized test-retest design, with for each n=10 test person and k=20 examiners, the intertester reliability (IER) and Intratester reliability (IAR) of the measuring procedures: “short and long goniometer”, “visual estimation”, “electrical goniometer” and “Vitronic Body Scanner with and without localization markers”. For the test procedures short, long and electrical goniometer weak IER and IAR (ICC 0,05). A diffuse international data situation makes a closing classification of the results more difficult and suggests the necessity for a high-quality meta-analysis to the topic. KW - range of motion, knee joint Y1 - 2015 UR - https://www.researchgate.net/publication/273004428_Concerning_the_evidence_of_therapeutic_assessments_The_determination_of_the_range_of_motion_of_the_knee_joint_in_sagittal_plane SN - 978-83-88380-73-0 SP - 77 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Vorwerg, Susan A1 - Michel, Sven A1 - Martin, Titus A1 - Braun, Alexander A1 - Prill, Robert A1 - Kirschner, Jana A1 - Meisinger, Matthias T1 - Influencing parameters on intensity control for cold applications to the knee joint T2 - The International Disabled People`s Day - XXIth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Cold therapy is a common postoperative treatment that is applied in different forms. Many studies reported which influence different refrigerant have on lowering the skin temperature, to the sensation of pain and the reabsorbing edema. In conclusion it can be stated that a lack of quality and low number of available studies, the efficacy of cryotherapy do not assign and the application after hip and knee arthroplasty is even contradictory. Striking are the various types of information with regard to the duration of application, shape and intensity. Because of the missing evidence for sensibility of application intensity this study aimed to determine influential parameters with moderate cold (11°C) for improving the intensity control. 15 healthy subjects aged 23.2±1.26 were tested. The parameters BMI, fat mass and muscle mass were recorded. All subjects received a cold application by the invented and developed IceCube at the right knee joint for 15 minutes. The temperature was measured for six times with an infrared thermometer at five standardized points of the knee joint. During application and till the last measurement subjects were immobilized. The applied cold application resulted in a significant decrease of temperature in all measuring points concerning the pre-post-comparison. 20 minutes after removing the cuff significant temperature increases in 3 measurement points, still keeping below starting level, were remarked. Furthermore it is evident that the temperature differences of the muscular measuring points are significantly higher than those of the not muscular measuring points. Besides a higher fat portion leads due to the isolation effect in relation to musculature to significantly fewer variations in temperature. This realization is to be considered for an adequate intensity regulation. In order to confirm the force of expression of the results, it requires further investigations with higher test person numbers. Y1 - 2015 UR - https://www.researchgate.net/publication/273004421_Influencing_parameters_on_intensity_control_for_cold_applications_to_the_knee_joint SN - 978-83-88380-73-0 SP - 78 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven A1 - Meisinger, Matthias A1 - Prill, Robert A1 - Kirschner, Jana A1 - Vorwerg, Susan T1 - The objective measurement of individual work-related functional performance in the context of medical rehabilitation - First results of a case study with the ERGOS - Work Simulator T2 - The International Disabled People`s Day - XXIth edition - Life without Pain / Healthy Children - Healthy Europe N2 - In the context with the high meaning of work for the human, the enormous job-specific demands on psychophysical performance and the need for a rapid return to working life in case of injury or disease, the importance of the diagnosis of occupational performance in therapy is high. Diagnostically and therapeutically challenging to workers are mainly the biomechanical, the sensomotoric and psychosocial strain in the workplace. In case of illness with rehabilitative requirements should therefore medical therapy be dovetailed with work and work-related activities. That connection is a necessary development of rehabilitative care system in Germany, not least in view of the legal order of the German Pension Insurance to help injured patients and to support their return to work. In the work-related orientation of medical rehabilitation is the professional life of rehabilitation involved in all phases of therapy. The instruments for the diagnosis of occupational problems are both objectively and subjectively oriented Questionnaires with external and self-assessment, FCE systems (functional capacity evaluation) and medical documentation systems. The Ergos® Work Simulator is a psychophysical FCE system, which captures the individual motor skills in relation to the performance of job-specific requirement profiles. The evaluation of job performance is based on a profile pool of about 14,000 professional activities. The tests are standardized and analyze frequent physical aspects of the work (eg lifting, carrying) to ensure a realistic assessment. KW - individual work - related functional performance; work simulator Y1 - 2015 UR - https://www.researchgate.net/publication/273004385_The_objective_measurement_of_individual_work_-_related_functional_performance_in_the_context_of_medical_rehabilitation_-_First_results_of_a_case_study_with_the_ERGOS_-_Work_Simulator SN - 978-83-88380-73-0 SP - 17 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Bartsch, Carolin A1 - Braun, Alexander A1 - Martin, Titus A1 - Michel, Sven T1 - An investigation of different body sweat areas to analyze blood lactate and sweat lactate with constat load T2 - The International Disabled People`s Day - XXIVth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Sweat is essential for the hydrologic and electrolytic regulation. Additionally it includes important information about the personal efficiency. Consequently, sweat is diverse in diagnostics for example pediatrics, internal medicine or sports diagnostic. At first, the medium sweat is only associate with blood samples on the ear. But sweat has lactate molecule in the eccrine gland which to take and analyze with modern filter systems. The method is patient- friendly, fast and non- invasive. Therefore lactate analyze in sweat is a simple, practicable method which could be testing in field studies. Although there are any information about sweat as a blood and lactate analyze but the science research is exciting more than ever before. For example, it could be interesting which body area is the ideal application point. In first studies, we found a number of measurement areas. Secondary, we want to testing twenty test persons on a treadmill with a speed about 10 km/ h. Afterwards three minutes, we want to take blood lactate and sweat lactate at the mess areas. That could be mess points on the upper and lower extremities, the front and back side as soon as including the head. Consequently, the results is to compare with central and peripheral points in association with core body temperature and time delay. In the end, it could be compare blood lactate and sweat lactate. Y1 - 2018 SN - 978-83-88380-76-1 SP - 95 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Otto, Gesine A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven T1 - Bimanual working in the physical therapy - An investigation of possible disbalance of the hand grip strength and eye-hand coordination of physical therapists T2 - The International Disabled People`s Day - XXIVth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Apart from widespread medical and therapeutic expertise a physical therapists needs occupation specific physical resources. Concerning the upper limb a distinct hand grip strength as well as a precise eye-hand coordination are of vital importance. Furthermore the therapists outcome of executed standardized grip settings of manual techniques and power impulses, i.e. the strength testing according to Janda, both handed or mirrored should be nearly identical. Potential individual disbalances could distort the medical findings of the patient or even influence the therapy in a negative matter. Therefore the balanced bimanual working should already be learned during the vocational training and should then be kept during the years of work. The aim of this study about physical therapists was to gain knowledge about possible disbalances of the observed skills. The sample consists of 47 test persons, including 27 pupils of physical therapy (M = 22.2 years, SD = 4.7) and 20 working physical therapists (M = 38.9 years, SD = 9.7). In an elicitation the status of the handgrip strength was acquired with a hand dynamometer whereas the status of the eye-hand coordination and of the finger skillfulness was acquired with the pegboard. There were no statistical significant disbalances found within cohorts. In contrast to that the group of pupils showed side differences regarding the finger skillfulness and the eye-hand coordination. Those differences didn’t occur in the group of working physical therapists. Therefore two conclusions could be made: (1.) either the former side differences of working physical therapists are equalized by the daily work or (2.) the disbalances show a trend regarding the regressive skills of new pupils. Finally it is recommended to execute a larger longitudinal study to evaluate the regression of both handed, sensomotoric skills of future physical therapists and to counteract this development- if necessary - with a bimanual subject area embedded in the curriculum of the vocational education. Y1 - 2018 SN - 978-83-88380-76-1 SP - 128 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorcelec ER - TY - GEN A1 - Schulte-Westenberg, Niklas A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven T1 - The virtual reality in physiotherapeutic performance diagnostics - A study of the reliability and validity of the virtually supported upper limb plate tapping test T2 - The International Disabled People`s Day - XXIVth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Digitalization is the central challenge of the modern working environment. Some professions were always in need of digital skills, other professions now gain the need for these skills as well. With the importance of visumotor skills on the rise, the significance of conditional abilities will keep decrea-sing. Exact accuracy at top speed is increasingly needed in occupations like control tower operator, train conductor or in a control room of emergency services. New challenges in physiotherapeutic performance diagnostics and treatments continue to develop throughout this megatrend. It is also important not to limit the performance diagnostics due to age. Firstly, digital skills get crammed by children already at young age, useful for the modern working environment. These recent develpoments show the need for performance diagnostics of all ages. One approach are techniques with infrared LEDs and vertical lasers. Business and free time chal-lenges can be transformed and measured precisely in virtual reality. We developed the plate tap-ping test to test the upper body reaction time in a virtual environment. As in the first steps in the VR performance diagnostic we plan to test 300 probands of different age. Furthermore, a VR Test-ing battery will be developed, in order to simulate realistic requirements for an individual perfor-mance profile. Y1 - 2018 SN - 978-83-88380-76-1 SP - 127 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Joost, Theresa A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven T1 - Comparison of the curve of the lactate concentration in the medium sweat an blood at constand load T2 - The International Disabled People`s Day - XXIVth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Lactate acts not only as a metabolic indicator for aerobic capacity, but also as a marker for an increased mortality risk. Therefore, its determination is of vital importance in intensive medical care, physical therapy rehabilitation of cardiological and other internal patients as well as in mass and competitive sports. Currant invasive diagnostic procedures utilize the carrier medium blood. However, this valide and reliable method bears a great number of drawbacks, i.e. a higher risk of infection and expenses through the mandatory presence of healthcare professionals. The determination of sweat lactate is a promising approach. The aim of this study is to investigate the transferability of metabolic-physiological processes of lactate accumulation from blood to sweat, based on the comparison of the lactate curves with constant exposure over a defined period of time. The research group consists of 50 healthy volunteers in early adulthood at equal sexual proportions. The measurement regime initially provides for a test procedure on the treadmill ergometer at a constant speed of 10 km / h. In five measurements, both sweat and blood samples are taken after every three-minute exercise periods, which are used to determine the respective lactate concentration. As a result, an alternative non-invasive lactate diagnosis should be developed in real time, which meets the high quality criteria of the bloody determination. Welding lactate diagnostics means a reduction in costs, time and staff, as well as being more patient-friendly and allowing use in field studies. Y1 - 2018 SN - 978-83-88380-76-1 SP - 95 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Prill, Robert A1 - Michel, Sven A1 - Kirschner, Jana A1 - Martin, Titus A1 - Braun, Alexander A1 - Vorwerg, Susan T1 - Arthritis and sports in old age - challenges and opportunities for physiotherapy in amateur sport - approaches to prevention and activity design using the example of a single case study in Judo T2 - The International Disabled People`s Day - XXth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Arthritis is an illness, which is usually frequently due to degenerative or traumatic causes and can in almost all joints of the human body occur. Joints frequently concerned are for example the hip, knee and shoulder joint. Triggering factors are apart from immobilization also overload and micro traumas. Thus it does not surprise that in the individual kinds of sport some joints are affected by arthritis more frequently than others. The promotion of the public health represents an important task of the popular sport. In order to be able to manage this task fairly, it is compellingly necessary to analyze the factors taking influence on the activity ratio. The frequent occurrence of pain affects the activity ratio negatively. The popular sport sees itself with an increasing obsolescence of the population and all the same with older sportsman and club members confronted. Therefore individual kinds of sport must, in order to be arranged attractive for older sportsmen it, be examined on their pain and arthritis of promoting elements. These are to be reduced then and be supplemented by jointcareful exercise and training programs, which make a pain reduced sport exercising possible. Since there are senior groups in many associations, these programs are relevant not only for the individual sportsman to be implement but wide range of importance. Here a close co-operation of coaches and physiotherapists is in demand, in order to become fair to the complex requirements on such a training. A Brandenburgian Judoka, who trains active for over fifty years, suffers for many years under arthritis in the hip joint. By the implementation of some physical therapy relevant training contents and a regular goal agreement, is it possible to merge the sportsman actively, despite hip joint total endoprosthesis, into the training happening. To be able to make a representative statement on the relevance of the physical therapy support in the club sport, further investigations are necessary. Y1 - 2014 UR - https://www.researchgate.net/publication/273004283_Arthritis_and_sports_in_old_age_-_challenges_and_opportunities_for_physiotherapy_in_amateur_sport_-_approaches_to_prevention_and_activity_design_using_the_example_of_a_single_case_study_in_Judo SN - 978-83-88380-72-3 SP - 25 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Suliga, Edyta A1 - Cieśla, Elżbieta A1 - Michel, Sven A1 - Kaducakova, Helena A1 - Martin, Titus A1 - Śliwiński, Grzegorz A1 - Braun, Alexander A1 - Izova, Marcela A1 - Lehotska, Maria A1 - Kozieł, Dorota A1 - Głuszek, Stanisław T1 - Diet Quality Compared to the Nutritional Knowledge of Polish, German, and Slovakian University Students—Preliminary Research T2 - International Journal of Enviromental Research an Public Health N2 - The eating habits of students differ significantly from those recommended by health practitioners. The aim of this study was to find differences related to diet quality and knowledge on nutrition among Polish, German, and Slovakian students as well as to examine which factors differentiate the diet quality of students from these three countries. The study was conducted on a group of 394 university students from Poland, Germany, and Slovakia. The assessment of diet quality and knowledge on food and nutrition was done with the use of the Dietary Habits and Nutrition Beliefs Questionnaire. The diet of German students was characterized by a significantly higher consumption of legume-based foods, vegetables, and fruit compared to Polish students and Slovakian participants (p < 0.001). The diet of the Poles was characterized by a high consumption of cured meat, smoked sausages, hot dogs, white bread and bakery products, butter, fried foods, and energy drinks. The most important factors significantly associated with diet quality involved the country, place of residence, Body Mass Index (BMI), physical activity, and time spent watching TV or using a computer. Polish students were characterized by the highest level of knowledge on food and nutrition (p < 0.001). However, it was not reflected in their diet. The authorities of universities should aim to provide students with access to canteens on campuses which would offer the possibility of consumption of both affordable and healthy meals. KW - eating habits KW - young adults KW - nutritional knowledge Y1 - 2020 U6 - https://doi.org/10.3390/ijerph17239062 SN - 1660-4601 SN - 1661-7827 VL - 17 IS - 23 ER - TY - GEN A1 - Michel, Sven A1 - Bachmann, Jana A1 - Witte, Julia A1 - Martin, Titus A1 - Braun, Alexander A1 - Hage, Joachim T1 - Der Status konditioneller Fähigkeiten als Teilkomponente der motorischen Leistungsfähigkeit bei 6-jährigen Vorschulkindern. Ergebnisse und Interpretation einer urbanen Studie und die Notwendigkeit physiotherapeutischer Interventionen T2 - Zeitschrift für Physiotherapeuten N2 - Eine Vielzahl aktueller Studien und populärwissenschaftlicher Veröffentlichungen weist auf einen Rückgang motorischer Fähigkeiten bei Kindern und Jugendlichen hin. Dadurch ist, forciert durch die Verfolgung unterschiedlicher Interessen, das Bild eines generellen motorischen Leistungsverlusts entstanden, das mit Blick auf die gesellschaftliche Leistungsfähigkeit der Kinder unter anderem physiotherapeutische Interventionen im Vorschulbereich postuliert. Die hier vorliegende Studie widmet sich dieser Thematik und untersucht den Status konditioneller Fähigkeiten bei 6-jährigen Vorschulkindern. KW - Leistungsfähigkeit KW - Vorschulkinder KW - konditionelle Fähigkeiten KW - altersgemischte Gruppen Y1 - 2013 SN - 1614-0397 VL - 65 IS - 8 SP - 20 EP - 33 ER - TY - GEN A1 - Braun, Alexander A1 - Martin, Titus A1 - Alfermann, Dorothee A1 - Michel, Sven T1 - Überprüfung der Reliabilität und Validität der Kurzform des Physical Self-Description Questionnaire (PSDQ-S) in den Altersgruppen des frühen und späten Erwachsenenalters T2 - Zeitschrift für Sportpsychologie N2 - Zusammenfassung. Mit dem Physical Self-Description Questionnaire Short (PSDQ-S) von Marsh, Martin und Jackson (2010) liegt eine auf 40 Items gekürzte validierte Version des Physical Self-Description Questionnaire von Marsh, Richards, Johnson, Roche und Tremayne (1994) vor, die bereits in mehrere Sprachen übersetzt ist. Die vorliegende Studie evaluierte den deutschsprachigen PSDQ-S anhand von 402 Probanden im frühen und späten Erwachsenenalter. Im Ergebnis lassen die Analyse der Reliabilität und Validität sowie der Vergleich mit den Befunden von Marsh et al. (2010), Stiller und Alfermann (2007) sowie weiterer übersetzter und validierter PSDQ-S-Versionen die Verwendung der deutschsprachigen Kurzform empfehlen. Ebenso wie die Originalversion ist sie für männliche und weibliche Personen, sowie für die Altersgruppen des frühen und späten Erwachsenenalters geeignet. Für alle vier Gruppen besteht eine äquivalente Faktorstruktur. KW - PSDQ-S KW - physisches Selbstkonzept KW - frühes und spätes Erwachsenenalter Y1 - 2018 U6 - https://doi.org/10.1026/1612-5010/a000236 SN - 2190-6300 SN - 1612-5010 VL - 25 IS - 3 SP - 115 EP - 127 ER - TY - GEN A1 - Vorwerg, Susan A1 - Michel, Sven A1 - Kirschner, Jana A1 - Braun, Alexander A1 - Martin, Titus T1 - The meaning of the work intensity when capturing the work related capacity in the context of the “professional life of the future”. T2 - The International Disabled People`s Day - XXIVth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Nowadays, employment takes a central role in the society, the work-related performance diagnostics are increasingly becoming the focus of attention. In consideration of the changing professional life, by mega trends like digitization, globalization and demographic change, there is a need to adapt these procedures to future-relevant conditions. Because of that, the aim of this investigation is to fathom the importance of the work intensity for the future job market. The sample consists of 86 persons. The first group (N = 36) encloses employed person of the first job market. The second group (N = 50) exists of people of the federal program „Social Participation in the labor market“. About a cross section elevation both groups were compared with each other as well as standard value comparisons were drawn. The upraised parameters are the state of health and the work intensity on the example of lifting force (lifting ground to waist height). The health situation of these both groups showed significant differences in almost all parameters. The central result is the missing significance between the groups in the maximum force values while lifting. Also the standard value comparison of lifting did not produce a significant association to the group and less than half of all study participants reached the norm. Despite differences in the health status of the two groups, due to the approximate force values of lifting, a decreasing importance of this ability to participation in the future labor market can be noted. In conclusion, the existing work-related diagnostic procedures which still move the working intensity in the center of all assessments, should be reconsidered. However this results reflects initial tendencies, this has to be proven by further investigations. Y1 - 2018 UR - http://mdi-online.net/MDI/images/Streszczenia_Abstracts_MDI_2018_WEB.pdf SN - 978-83-88380-76-1 SP - 106 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Braun, Alexander A1 - Martin, Titus A1 - Vorwerg, Susan A1 - Michel, Sven A1 - Prill, Robert A1 - Kirschner, Jana T1 - Activ 50plus: insight in a movement-intensive health promotion program to improve the general and occupational performance T2 - The International Disabled People`s Day - XXth edition - Life without Pain / Healthy Children - Healthy Europe N2 - The concept of health has several possible definitions. One approach offers the (common) definition of health by the WHO, which distinguishes the physical, 2 psychological and social field. In their connection to the concept of salutogenesis by Aaron Antonovsky and the core objectives of the Health Sports by Klaus Bös and Walter Brehm health promotion programs aim the focus movement to improve the physical health of the human resource. Consequently, the resulting physical core objective focused physical performance factors, such as the mobility, endurance, strength and coordination. In the study presented here were in the first Phase by means of a multidimensional test battery several basic motor skills of more than 500 non-physically active subjects of advanced middle-aged adults in more than 20 locations detected extending oriented. This was possible on one hand the assessment of achievements for each measurement time point and on the other hand their development as a result of a movement-intensive health promotion program. In addition to the general performance of the working life requires a job-specific performance or the job-specific specialization of general skills. For the assessment of work-related performance is the Functional Assessment Instrument Capacity Evaluation (FCE) is available. With the aid of standard simulations, the FCE follows the requirements in the work environment as realistically replicate. In the second Phase (from 2014) the job-specific performance of the subjects is investigated by means of the FCE to build on the test results of the existing health care funding needs-based to expand. The increasing mental and physiosche stress in everyday life and at work leads to increased stress on the job-specific performance and health. Therefore get multidimensional health support programs, such as the program presented here, a growing importance. Y1 - 2014 UR - https://www.researchgate.net/publication/273004524_Activ_50plus_insight_in_a_movement-intensive_health_promotion_program_to_improve_the_general_and_occupational_performance SN - 978-83-88380-72-3 SP - 27 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Kirschner, Jana A1 - Prill, Robert A1 - Michel, Sven A1 - Martin, Titus A1 - Braun, Alexander A1 - Vorwerg, Susan T1 - Status of depression risk in urban areas and its influence on quality of life T2 - The International Disabled People`s Day - XXth edition - Life without Pain / Healthy Children - Healthy Europe N2 - Recent studies of the "male depression" deal among other things with the question of whether men classic depression symptoms are compensated or covered by masked stress symptoms. Symptoms, which may not capture a classic diagnosis of depression are, for example an increased alcohol consumption, increased irritability or increased aggressiveness. This question is strengthened by a simultaneous consideration of the risk of illness and the suicide rate in relation to women. Furthermore, the unipolar depression with a prevalence of 10,4% in Germany is the leading cause of impairments of life. Subject of this study was to survey a population sample of 100 healthy physically and mentally male volunteers aged between 15 and 65 Years of age (mean age 29,64 years) in the Dresden area. Most of the respondents were laborers (46,8%), 29,2% were in training, and the remaining subjects were divided into 17,7% students and 6,3% of college graduates. The survey was conducted by means of two questionnaires in January 2012 the Gotland Scale of Male Depression for detection of depression risk and the SF-12 as a disease cross-measuring instrument of subjective health-related quality of life. Exclusion factors were already diagnosed depression, mental and neurological disorders. The response rate was 96%. The results of the Gotland Scale documented a reduced well-being with a possible risk of depression of 13,5%. In evaluation of the FS-12, the results were in the range of gender-specific physical health score was 21,9% and the mental summary scale at 24% outside of the normal range. In the comparison of the two questionnaires was a whole are obtained only a weak negative correlation slightly. This corresponds to a significantly higher risk of depression for men as it occurs clinically in appearance and suggests that an approximately 50% likelihood of underdiagnosis is. Therefore, further activities in the early detection of stress symptoms in the diagnosis of depression and burn-out should be made. Y1 - 2014 UR - https://www.researchgate.net/publication/273004470_Status_of_depression_risk_in_urban_areas_and_its_influence_on_quality_of_life SN - 978-83-88380-72-3 SP - 31 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Michel, Sven A1 - Vorwerg, Susan A1 - Braun, Alexander A1 - Martin, Titus A1 - Prill, Robert A1 - Kirschner, Jana T1 - Effect of a moderate cold application during a 8-minute going load on selected parameters among aged patients with total knee joint endoprosthesis T2 - The International Disabled People`s Day - XXth edition - Life without Pain / Healthy Children - Healthy Europe N2 - One of the most commonly performed orthopedic and trauma surgical intervention is, beneath the joint arthroscopic intervention and the implantation of hip prostheses, the endoprosthetic knee replacement. The early postoperative rehabilitation takes place usually in the hospital. Due to the enormous reduction of waiting times it has an even more important role. Currently, therefore, the process guidelines on the content and 2 orientation of therapies are optimized on the basis of current research. A starting point is the application of moderate cooling and their coupling with elements of movement therapy. In contrast to the previous application (before and after a movement of intervention), we apply cold refrigerant during the movement. The aim of this pilot study was the clinical testing of a specially developed and based on Peltier technology sensor-based cooling system, including its assessment of efficacy. This 8 very elderly patients (Age 78±2,8 years; body height 169±3,7 cm, body mass 84,9±9,4 kg, no other diseases) were divided into two groups and subjected to gait therapy. The treatment group also received a moderate cooling application of 17°C, which was permanently on the o perated knee, while walking. With those results there is intended to be a completely positive effective influence of cooling within the applied temperature range. As much drug-free pain relief and improvement of physical-motor performance (thus option of load increase and higher adaptation rate, shorten the rehabilitation time) in lack of contraindications are noted. For final representative statements, further studies are necessary due to the small sample size. There is tend to both, excellent suitability, such as a clinical need of the constructed cooling system to be discerned. Y1 - 2014 UR - https://www.researchgate.net/publication/273004528_Effect_of_a_moderate_cold_application_during_a_8-minute_going_load_on_selected_parameters_among_aged_patients_with_total_knee_joint_endoprosthesis SN - 978-83-88380-72-3 SP - 33 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Vorwerg, Susan A1 - Michel, Sven A1 - Martin, Titus A1 - Braun, Alexander A1 - Kirschner, Jana A1 - Prill, Robert T1 - Effect of endurance power oriented back training on selected subjective and objective health parameters in long term unemployed over 50 years of age T2 - The International Disabled People`s Day - XXth edition - Life without Pain / Healthy Children - Healthy Europe N2 - In the last 20 years it could be occupied at numerous studies and researches that unemployed persons exhibit a significantly worse state of health compared with working persons. From this it can be derived that an increase of the unemployment duration leads to an increase of the illnesses. Due to different illnesses by unemployment, can develop effects on physical, psychological and social level. In order to work against this process and keep health consequences of long-term unemployment as small as possible (not least for reasons of the reintegration into the job market), the health promotion stands increasingly in the focus. A goal of the following study was to find out the effects of a strength-perseveranceoriented back training in regard to physical, psychological and social level. 13 longterm unemployed women (age 56.08 ± 3.17 years) were examined and trained 5 weeks. The state of health and the movement behavior was assessed with an anamnesis. The admission of the objective health parameters was carried out by the determination of the anthropometrics values by means of BIA balance, as well as by the determination of the strength impact from belly and back muscles using Total Trunk. The subjective health parameters were seized over a sensibility to pain scale and a questionnaire to the general habitual well-being. On this basis the obtained results, regarding the anthropometric values and the sensibility to pain, there could not be determined significant changes, but emphasized positive tendencies. Significant changes showed up with some parameters of the general habitual wellbeing (Well-Being-Score, psychological miss-being), as well as with the strength impact, which took the main meaning regarding the training program. Therefore it can be said that a 5-week strength-perseverance-oriented back training, improve on the one hand to the physical health, accompanies in view to the strength perseverance ability of belly and back muscules and on the other hand the psychological health, by a significant decrease of the psychological miss-being. Due to the open questions resulting from it further investigations are necessary, in order to confirm the force of expression of the results. Y1 - 2014 UR - https://www.researchgate.net/publication/273004480_Effect_of_endurance_power_oriented_back_training_on_selected_subjective_and_objective_health_parameters_in_long_term_unemployed_over_50_years_of_age SN - 978-83-88380-72-3 SP - 133 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorzelec ER - TY - GEN A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven A1 - Wendler, Johannes A1 - Nocke, Andreas A1 - Cherif, Chokri A1 - Ibarlucea, Bergoi A1 - Cuniberti, Gianaurelio T1 - Development of textile-based and planar sensors for continuous non-invasive real-time recording of the lactate value curve for diagnostics according to clinical requirements N2 - We hereby present the findings for a new technology to produce portable, flexible, long- term stable and high-resolution sensors and measuring systems for individual lactate value recording in body sweat for regenerative and sports. A main goal of this study has been the identification of application sites according to body sweat quality and quantity, as well as easy accessibility and handling of the measurement site. For the continuous recording of the lactate value curve with integrated temperature compensation, new types of multifunctional sensor constructions and evaluation algorithms have been developed that can detect and evaluate these parameters precisely and interference-free in real time in body sweat in order to establish a diagnostic correlation with the clinical, therapeutic and sports medicine performance- oriented application scenarios. For this purpose, suitable planar sensor principles have been investigated and a planar sensor was developed. A textile-based sensor suitable for long-term use (several hours to several days of use) has been developed as a braided construction. In particular, a functionalized chitosan layer with a sensitive enzyme and several required electrodes wires have been purposefully used. Due to a high selectivity, i.e. clear signal interpretation even in the presence of other substances in body sweat, enzymatic measuring systems in an amperometric measure- ment design were primarily investigated. The preferred solution of the developed planar sensor is to be used as a reference sensor for calibration and, together with the preferred solution of the textile sensor, is to be integrated into the demonstrators. From the intended project results, an immediate direct benefit can be derived for SMEs in the textile manufacturing, finishing and medical products sectors and for the measurement and sensor technology sector. Y1 - 2021 UR - https://www.aachen-dresden-denkendorf.de/fileadmin/user_upload/itc/teilnehmerbereich/Poster/56_Martin_4_BTU_Development_of_textile-based_sensors.pdf PB - ADD International Textile Conference 2021 ER - TY - GEN A1 - Isanta-Navarro, Jana A1 - Klauschies, Toni A1 - Wacker, Alexander A1 - Martin-Creuzburg, Dominik T1 - A sterol-mediated gleaner–opportunist trade-off underlies the evolution of grazer resistance to cyanobacteria T2 - Proceedings of the Royal Society : Series B, Biological sciences KW - Toxicity Y1 - 2022 U6 - https://doi.org/10.1098/rspb.2022.0178 SN - 1471-2954 VL - 289 IS - 1974 ER - TY - GEN A1 - Octorina, Pelita A1 - Böhm, Alexander A1 - Martin-Creuzburg, Dominik A1 - Straile, Dietmar T1 - Morphological defences and defence–cost trade-offs in Daphnia in response to two co-occurring invertebrate predators T2 - Freshwater Biology KW - morphological defences KW - multi-predator environment Y1 - 2022 U6 - https://doi.org/10.1111/fwb.13888 SN - 1365-2427 VL - 67 IS - 5 SP - 883 EP - 892 ER - TY - GEN A1 - Hofrichter, Martin A1 - Kellner, Harald A1 - Herzog, Robert A1 - Karich, Alexander A1 - Kiebist, Jan A1 - Scheibner, Katrin A1 - Ullrich, René T1 - Peroxide-Mediated Oxygenation of Organic Compounds by Fungal Peroxygenases T2 - Antioxidants N2 - Unspecific peroxygenases (UPOs), whose sequences can be found in the genomes of thousands of filamentous fungi, many yeasts and certain fungus-like protists, are fascinating biocatalysts that transfer peroxide-borne oxygen (from H2O2 or R-OOH) with high efficiency to a wide range of organic substrates, including less or unactivated carbons and heteroatoms. A twice-proline-flanked cysteine (PCP motif) typically ligates the heme that forms the heart of the active site of UPOs and enables various types of relevant oxygenation reactions (hydroxylation, epoxidation, subsequent dealkylations, deacylation, or aromatization) together with less specific one-electron oxidations (e.g., phenoxy radical formation). In consequence, the substrate portfolio of a UPO enzyme always combines prototypical monooxygenase and peroxidase activities. Here, we briefly review nearly 20 years of peroxygenase research, considering basic mechanistic, molecular, phylogenetic, and biotechnological aspects. KW - unspecific peroxygenase KW - monooxygenase KW - peroxidases KW - hydroxylation KW - epoxidation KW - dealkylation Y1 - 2022 UR - https://www.mdpi.com/2076-3921/11/1/163 U6 - https://doi.org/10.3390/antiox11010163 SN - 2076-3921 VL - 11 IS - 1 SP - 1 EP - 21 ER - TY - GEN A1 - Raab, Thomas A1 - Raab, Alexandra A1 - Bonhage, Alexander A1 - Schneider, Anna A1 - Hirsch, Florian A1 - Birkhofer, Klaus A1 - Drohan, Patrick J. A1 - Wilmking, Martin A1 - Kreyling, Jürgen A1 - Malik, Ireneusz A1 - Wistuba, Małgorzata A1 - Maaten, Ernst van der A1 - Maaten-Theunissen, Marieke van der A1 - Urich, Tim T1 - Do small landforms have large effects? A review on the legacies of pre-industrial charcoal burning T2 - Geomorphology N2 - Relict charcoal hearths (RCHs) are small, anthropogenic landforms resulting from past charcoal burning and reaching significant land coverage in pre-industrial mining areas. We review three coupled legacies linked by RCH development: (i) a landscape-scale geomorphic effect, (ii) a unique soil fingerprint, and (iii) an evolving novel ecosystem. The history and technique of charcoal production are described to clarify legacy effects. Applying a recently presented morpho-genetic catalogue is useful for classified mapping of RCH findings. The RCH numbers and calculated RCH densities per study region vary greatly and impose uncertainties due to insufficient methods causing over- or underestimations. Areas with high RCH densities between 50 and 500 RCH/km2 seem reasonable. Machine learning-based remote sensing techniques are promising approaches with which to better assess the full scale of charcoal burning legacies. RCH soil properties feature dark charcoal-rich technogenic substrate layers classified as Auh horizons according to the World Reference Base with significantly increased C contents. These Auh horizons can also exhibit specific physical and chemical properties, such as relatively low bulk density, high porosity, high plant available water content, low thermal conductivity and differences in cation exchange capacity or nutrient status. However, relevant studies are rare, and thus, the effects may differ by study region. Regarding vegetation, there seem to be four main effects: changes in forest structure, species composition, recruitment pattern and productivity. The number of studies on this issue is, however, also very limited. Even fewer studies have examined the soil fauna in RCHs; thus, the reported effects cannot be used to draw general conclusions. Notably, RCH research has made considerable progress in the last five years, especially in the Light Detection and Ranging-based mapping of these small landforms and identification of RCH-specific soil properties, but ecological legacies are not well understood; thus, more interdisciplinary and integrative studies are needed. KW - Soil KW - Ecosystem KW - Forestry KW - Land Use KW - Anthropocene KW - Relict Charcoal Hearth (RCH) KW - Charcoal Kiln Remain (CKR) Y1 - 2022 U6 - https://doi.org/10.1016/j.geomorph.2022.108332 SN - 0169-555X VL - 413 ER - TY - BOOK A1 - Ebner von Eschenbach, Anna-Dorothea A1 - Helms, Martin A1 - Kleinhans, Alexander A1 - Laaha, Gregor A1 - Schümberg, Sabine A1 - Walther, Jörg A1 - Willems, Winfried A1 - Wittenberg, Hartmut T1 - Statistische Analyse von Niedrigwasserkenngrößen N2 - Niedrigwasser ist ein integraler Bestandteil des Abflussregimes, der einen zeitlich und regional begrenzten Zustand in einem oberirdischen Gewässer beschreibt, bei dem der Wasserstand oder der Abfluss einen bestimmten Schwellenwert erreicht oder unterschreitet. Die Kenntnis der Niedrigwasserverhältnisse in einem Gewässer hat damit große Bedeutung für seine zielgerichtete wasserwirtschaftliche Nutzung und ökologische Bewertung. Niedrigwasser ist in erster Linie bedingt durch Niederschlagsmangel, kann sich jedoch auch durch den Rückhalt des Niederschlags in der Schneedecke, in Gletschern oder im gefrorenen Untergrund ergeben. Zudem kann es anthropogen durch diverse Bewirtschaftungsmaßnahmen im Gewässer oder dessen Einzugsgebiet verstärkt oder abgeschwächt werden. In diesem Merkblatt werden zunächst die wichtigsten Kenngrößen für das Niedrigwasser definiert: Niedrigwasserabfluss bzw. -wasserstand, Unterschreitungsdauer, Abflussdefizit sowie aus der Dauerlinie abgeleitete Quantile. Für die Ermittlung der Unterschreitungsdauer und des Abflussdefizits sind Schwellenwerte erforderlich. Sie sollten in Abhängigkeit von der Zielstellung der Untersuchung festgelegt werden. Es werden sowohl die natürlichen und anthropogenen Einflussgrößen auf das Niedrigwasser diskutiert, als auch die genannten Kenngrößen und deren Ableitung aus der Ganglinie vorgestellt. Darauf aufbauend entwickeln sich inhaltlich die Kernthemen des Merkblatts: (1) Wahrscheinlichkeitsanalyse von Niedrigwasserabflüssen und (2) Wahrscheinlichkeitsanalyse von Unterschreitungsdauern und Abflussdefiziten. Mit Hilfe eines Verfahrensablaufs und anhand von Beispielen wird dem Leser schrittweise das methodische Vorgehen vermittelt – von der Festlegung der Kenngröße bis hin zur Ermittlung ihrer Quantile und deren Konfidenzgrenzen. Beide Verfahren setzen Stationarität der zugrundeliegenden Serien voraus, sodass im dritten Kernthema des Merkblatts (instationäre Wahrscheinlichkeitsanalyse) diskutiert wird, welche Möglichkeiten bestehen, um mit signifikanten Instationaritäten im Rahmen der Wahrscheinlichkeitsanalyse umzugehen. Y1 - 2022 SN - 978-3-96862-221-7 SN - 978-3-96862-222-4 PB - DWA, Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e.V. CY - Hennef ET - Juli 2022 ER - TY - GEN A1 - Cieśla, Elżbieta A1 - Suliga, Edyta A1 - Kadučáková, Helena A1 - Michel, Sven A1 - Ižová, Marcela A1 - Simočková, Viera A1 - Martin, Titus A1 - Braun, Alexander A1 - Kozieł, Dorota A1 - Gluszek, Stanisław T1 - Reproducibility of the German and Slovakian Versions of the Dietary Habits and Nutrition Beliefs Questionnaire (KomPAN) T2 - Nutrients N2 - Purpose. The aim of this study was to assess the reproducibility and reliability of the KomPAN questionnaire among two groups of university students from Germany and Slovakia. Methods. A total of 422 individuals (mean age 21.4 years, SD 4.0), including 197 from Slovakia (men 26.2%) and 225 from Germany (men 22.3%), were tested using the self-administered (SA-Q) version of the KomPAN questionnaire and then retested two weeks later. A cross-classification analysis, kappa coefficients, Cronbach’s ɑ coefficients, and a test-retest result comparison were conducted separately for each group of students to assess the reproducibility and reliability of the questionnaire. Results. The cross-classification values were higher than 46.2% among the German students and higher than 55.8% among the Slovakian students. The kappa coefficients ranged from 0.21 to 0.90 in the German students and from 0.38 to 0.94 in the Slovakian students. Cronbach’s ɑ ranged from 0.58 to 0.78. Conclusion. The questionnaire displayed a moderate to very good reproducibility, which was slightly higher in the Slovakian group than in the German group. Therefore, the questionnaire can be recommended for further analysis and comparison of the dietary habits among Germans and Slovakians on a larger scale. KW - food frequency questionnaire; dietary habits, reproducibility Y1 - 2022 U6 - https://doi.org/10.3390/nu14224893 SN - 2072-6643 VL - 14 IS - 22 ER - TY - GEN A1 - Badenhoop, Tristan A1 - Michel, Sven A1 - Martin, Titus A1 - Braun, Alexander A1 - Otto, Gesine ED - Sliwinski, Zbigniew ED - Sliwinski, Grzegorz T1 - Coordinative efficiency of physiotherapy students – A status of coordination regarding manual dexterity and balance of prospective physiotherapists. T2 - The International Disabled People`s Day - XXVth edition - Life without Pain / Healthy Children - Healthy Europe Y1 - 2019 SN - 978-83-88380-77-8 PB - Oficyna Wydawnicza Klubu Literackiego "Inspiracje" CY - Zgorcelec ER - TY - GEN A1 - Shang, Yuanyuan A1 - Liu, Shaofei A1 - Liang, Zhida A1 - Pyczak, Florian A1 - Lei, Zhifeng A1 - Heidenreich, Tim A1 - Schöckel, Alexander A1 - Kai, Ji-jung A1 - Gizer, Gökhan A1 - Dornheim, Martin A1 - Klassen, Thomas T1 - Developing sustainable FeTi alloys for hydrogen storage by recycling T2 - Communications Materials N2 - Intermetallic alloys such as FeTi have attracted ever-growing attention as a safe and efficient hydrogen storage medium. However, the utilization of high-purity metals for the synthesis of such materials poses considerable concerns over the environmental sustainability of their large-scale production. Here, we report an approach for synthesizing FeTi from industrial scraps of iron (steels C45 and 316 L) and titanium (Ti alloy Grade 2) to reduce the carbon footprint associated with FeTi alloy synthesis, without compromising their hydrogen storage properties. At 50 °C and a pressure of 0 to 100 bar, the alloys obtained by using C45-Ti Grade 2 and 316L-Ti Grade 2 can absorb a maximum amount of hydrogen of 1.61 wt.% and 1.50 wt.%, respectively. Moreover, depending on the type of steel utilized, the thermodynamic properties can be modified. Our findings pave a pathway for developing high-performance, environmentally-sustainable FeTi alloys for hydrogen storage purposes using industrial metal wastes. Y1 - 2022 U6 - https://doi.org/10.1038/s43246-022-00324-5 SN - 2662-4443 VL - 3 IS - 1 ER - TY - GEN A1 - Konlechner, Stefan A1 - Keller, Arne A1 - Martin, Alexander A1 - Güttel, Wolfgang A1 - Fortwengel, Johann T1 - Sequential leadership logics for coping with tensions in structurally ambidextrous units T2 - Forschungspapier mit Vortrag bei der Konferenz 39th EGOS Colloquium 2023, 6.-8. Juli, Cagliari (Italien) Y1 - 2023 UR - https://www.egos.org/jart/prj3/egos/main.jart?rel=de&reserve-mode=active&content-id=1658501434997&subtheme_id=1633951214485&show_prog=yes ER - TY - GEN A1 - Keller, Arne A1 - Martin, Alexander A1 - Konlechner, Stefan A1 - Güttel, Wolfgang A1 - Fortwengel, Johann T1 - Evolving Tensions Across Different Stages of Ambidexterity T2 - Academy of Management Proceedings Y1 - 2023 U6 - https://doi.org/10.5465/AMPROC.2023.17856abstract SN - 0065-0668 SN - 2151-6561 VL - 2023 IS - 1 ER - TY - GEN A1 - Hiemann, Rico A1 - Hilger, Nadja A1 - Michel, Jörg A1 - Nitschke, Jörg A1 - Böhm, Alexander A1 - Anderer, Ursula A1 - Weigert, Martin A1 - Sack, Ulrich T1 - Automatic Analysis of Immunofluorescence Patterns of HEp‐2 Cells T2 - Annals of the New York Academy of Sciences N2 - The standard screening test for the recognition of autoimmune diseases is the proof of autoantibodies in serum of patients by indirect immunofluorescence (IIF) based on HEp‐2 cells. Manual evaluation of this test is very subjective, slow, and there are no objective parameters as guidelines available. Interlaboratory tests showed occasionally large deviations in the test evaluation resulting in a high variance of results. The aim of this project is fast, objective, safe, and economical automatic analysis of HEp‐2 IIF patterns. Images of IIF patterns were completely and automatically captured using an inverse motorized fluorescence microscope. Thereby, device‐specific parameters were controlled automatically, too. For fast analysis of IIF patterns new algorithms of image processing were developed. Artifacts were recognized and excluded from analysis by the developed software. Analysis of more than 80,000 images clearly demonstrated full automatization and fast processing of IIF patterns. Additionally serum‐specific fluorescence could be easily distinguished from background. Even very weak but positive patterns can be recognized and used for diagnosis. A detailed separation into different basic patterns is possible. Objective, fast, and disease‐related economical analysis of HEp‐2 immunofluorescence patterns is feasible. The implemented software algorithms allowed a mathematical way of describing IIF patterns and can therefore be a useful tool for the needed standardization process. KW - Autoimmune diagnostics KW - HEp-2 cell KW - Immunofluorescence KW - Automatic analysis KW - Screening Y1 - 2007 U6 - https://doi.org/10.1196/annals.1398.042 SN - 0077-8923 VL - 1109 IS - 1 SP - 358 EP - 371 ER - TY - GEN A1 - Charissé, Daniel A1 - Erus, Guray A1 - Pomponio, Raymond A1 - Gorges, Martin A1 - Schmidt, Nele A1 - Schneider, Christine A1 - Liepelt-Scarfone, Inga A1 - Riedel, Oliver A1 - Reetz, Kathrin A1 - Schulz, Jörg B. A1 - Berg, Daniela A1 - Storch, Alexander A1 - Witt, Karsten A1 - Dodel, Richard A1 - Kalbe, Elke A1 - Kassubek, Jan A1 - Hilker-Roggendorf, Rüdiger A1 - Baudrexel, Simon T1 - Brain age and Alzheimer's-like atrophy are domain-specific predictors of cognitive impairment in Parkinson's disease T2 - Neurobiology of Aging N2 - Recently, it was shown that patients with Parkinson's disease (PD) who exhibit an “Alzheimer's disease (AD)-like” pattern of brain atrophy are at greater risk for future cognitive decline. This study aimed to investigate whether this association is domain-specific and whether atrophy associated with brain aging also relates to cognitive impairment in PD. SPARE-AD, an MRI index capturing AD-like atrophy, and atrophy-based estimates of brain age were computed from longitudinal structural imaging data of 178 PD patients and 84 healthy subjects from the LANDSCAPE cohort. All patients underwent an extensive neuropsychological test battery. Patients diagnosed with mild cognitive impairment or dementia were found to have higher SPARE-AD scores as compared to patients with normal cognition and healthy controls. All patient groups showed increased brain age. SPARE-AD predicted impairment in memory, language and executive functions, whereas advanced brain age was associated with deficits in attention and working memory. Data suggest that SPARE-AD and brain age are differentially related to domain-specific cognitive decline in PD. The underlying pathomechanisms remain to be determined. KW - Alzheimer's disease KW - Brain Age KW - MRI KW - Parkinson's disease KW - Pattern classification Y1 - 2022 UR - https://www.sciencedirect.com/science/article/pii/S0197458021002748?via%3Dihub U6 - https://doi.org/10.1016/j.neurobiolaging.2021.08.020 SN - 0197-4580 VL - 109 SP - 31 EP - 42 ER - TY - GEN A1 - Malik, Alexander A1 - Hütter, Geralf A1 - Abendroth, Martin A1 - Kiefer, Bjoern T1 - Micromorphic FE2 simulation of plastic deformations of foam structures T2 - International Journal of Mechanical Sciences N2 - Capturing and predicting the effective mechanical properties of highly porous cellular media still represents a significant challenge for the research community, due to their complex structural interdependencies and known size effects. Micromorphic theories are often applied in this context to model the inelastic deformation behavior of foam-like structures, in particular to incorporate such size effect into the investigation of structure–property correlations. This raises the problems of formulating appropriate constitutive relations for the numerous non-classical stress measures and determining the corresponding material parameters, which are usually difficult to assess experimentally. The present contribution therefore alternatively employs a hierarchical micromorphic multi-scale approach within the direct FE2 framework to simulate the complex irreversible behavior of foam-like porous solids. The predictions of Cosserat (micropolar) and a fully-micromorphic theory are compared with conventional FE2 results and direct numerical simulations (DNS) for complex loading scenarios with elastic, elastic–plastic, and creep deformations. Therein, non-classical deformation modes of the microstructure resulting from the introduced micromorphic kinematics are visualized, as are the macroscopic hyperstresses and deformations. KW - Multi-scale KW - Homogenization KW - Size effects KW - Generalized continuum KW - Micromorphic theory KW - FE Y1 - 2024 U6 - https://doi.org/10.1016/j.ijmecsci.2024.109551 SN - 0020-7403 VL - 282 ER - TY - JOUR A1 - Raulien, Nora A1 - Friedrich, Kathleen A1 - Strobel, Sarah A1 - Raps, Stefanie A1 - Hecker, Friederike A1 - Pierer, Matthias A1 - Schilling, Erik A1 - Lainka, Elke A1 - Kallinich, Tilmann A1 - Baumann, Sven A1 - Fritz-Wallace, Katarina A1 - Rolle-Kampczyk, Ulrike A1 - Bergen, Martin von A1 - Aigner, Achim A1 - Ewe, Alexander A1 - Schett, Georg A1 - Cross, Michael A1 - Rossol, Manuela A1 - Wagner, Ulf T1 - Glucose-oxygen deprivation constrains HMGCR function and Rac1 prenylation and activates the NLRP3 inflammasome in human monocytes JF - Science Signaling N2 - Hypoxia and low glucose abundance often occur simultaneously at sites of inflammation. In monocytes and macrophages, glucose-oxygen deprivation stimulates the assembly of the NLRP3 inflammasome to generate the proinflammatory cytokine IL-1β. We found that concomitant glucose deprivation and hypoxia activated the NLRP3 inflammasome by constraining the function of HMG-CoA reductase (HMGCR), the rate-limiting enzyme of the mevalonate kinase pathway. HMGCR is involved in the synthesis of geranylgeranyl pyrophosphate (GGPP), which is required for the prenylation and lipid membrane integration of proteins. Under glucose-oxygen deprivation, GGPP synthesis was decreased, leading to reduced prenylation of the small GTPase Rac1, increased binding of nonprenylated Rac1 to the scaffolding protein IQGAP1, and enhanced activation of the NLRP3 inflammasome. In response to restricted oxygen and glucose supply, patient monocytes with a compromised mevalonate pathway due to mevalonate kinase deficiency or Muckle-Wells syndrome released more IL-1β than did control monocytes. Thus, reduced GGPP synthesis due to inhibition of HMGCR under glucose-oxygen deprivation results in proinflammatory innate responses, which are normally kept in check by the prenylation of Rac1. We suggest that this mechanism is also active in inflammatory autoimmune conditions. Y1 - 2024 U6 - https://doi.org/10.1126/scisignal.add8913 SN - 1945-0877 VL - 17 IS - 845 PB - American Association for the Advancement of Science (AAAS) ER - TY - GEN A1 - Kiene, Marvin A1 - Wacker, Alexander A1 - Martin-Creuzburg, Dominik T1 - Omega-3 versus Omega-6: Are We Underestimating the Ecological Significance of Arachidonic Acid in Aquatic Systems? T2 - Biomolecules N2 - The long-chain polyunsaturated fatty acids (PUFA) eicosapentaenoic acid (EPA, ω-3, or n-3) and arachidonic acid (ARA, ω-6 or n-6) are known to have distinct physiological functions, yet can both support growth and reproduction of consumers, raising the question of whether EPA and ARA are ecologically substitutable dietary resources. We explored the relative importance of EPA and ARA for the growth and reproduction of the freshwater keystone herbivore Daphnia in a life-history experiment. Both PUFA were supplemented in a concentration-dependent manner to a PUFA-free diet, separately and in combination (50% EPA: 50% ARA mixture). The growth-response curves obtained with EPA, ARA, and the mixture were virtually congruent and the thresholds for PUFA limitation did not differ, indicating that EPA (n-3) and ARA (n-6) were substitutable dietary resources under the applied experimental conditions. The actual requirements for EPA and ARA might change with growth conditions, e.g., under the influence of parasites or pathogens. The higher retention of ARA in Daphnia suggests that EPA and ARA are subject to different turnover rates, which also implies different physiological functions. Studies on the ARA requirements of Daphnia could provide valuable information on the presumably underestimated ecological importance of ARA in freshwater food webs. KW - arachidonic acid KW - eicosapentaenoic acid KW - polyunsaturated fatty acids KW - membrane lipids KW - eicosanoids KW - co-limitation KW - Daphnia KW - freshwater food webs KW - limitation KW - ecology Y1 - 2023 U6 - https://doi.org/10.3390/biom13050791 SN - 2218-273X VL - 13 IS - 5 ER - TY - GEN A1 - Malik, Alexander A1 - Hütter, Geralf A1 - Abendroth, Martin A1 - Kiefer, Bjoern T1 - Unrestricted micromorphic continuum : curvature constraints effects T2 - Proceedings in Applied Mathematics and Mechanics N2 - The properties of two-phase materials, with the special case of foams, strongly depend on their microstructure. These structures are generally modeled with Hill homogenization methods to reduce the computational effort compared to full-resolution simulations. For applications where the macroscopic dimensions of the structure under consideration are only a few multiples of its internal length, size effects occur, that is, the effective mechanical properties depend on the structure size. To achieve adequate homogenization, higher-order continuum theories must then be used to account for strong gradients in mechanical quantities. The present contribution extends the classical approach with the corresponding micromorphic degrees of freedom. In contrast to previous studies in the literature, all components of the micromorphic curvature tensor are incorporated. It has shown how the individual components of the third-order curvature tensor have to be implemented. Their effects on the structural behavior are investigated in depth. Y1 - 2024 U6 - https://doi.org/10.1002/pamm.202400170 SN - 1617-7061 VL - 24 IS - 3 ER - TY - GEN A1 - Martin, Alexander A1 - Horvat, Djerdj A1 - Jäger, Angela A1 - Pilav-Velić, Amila T1 - The impact of top management team's innovation orientation on organizational ambidexterity in transitional economies : evidence from Bosnia and Herzegovina T2 - Technology in society N2 - Organizational ambidexterity plays an essential role in understanding how firms compete and prosper in dynamic environments. However, our understanding of the antecedents and effects of organizational ambidexterity is primarily derived from studies conducted in developed economies, while transitional economies with their unique characteristics and challenges are less well understood. Grounded in upper echelon theory, this paper contends that the innovation orientation of a firm's top management team (TMT) impacts organizational ambidexterity and firm performance. Drawing on a dataset of 192 small and medium-sized companies from Bosnia and Herzegovina, and estimating several OLS regressions, we find evidence that TMT's innovation orientation negatively impacts firm performance in transitional economies. Further, we see that the impact of the TMT's innovation orientation on the balance dimension of organizational ambidexterity is inverted U-shaped. Organizational innovation culture leverages this relation. Intriguingly, we found that in transitional economies, organizational ambidexterity was not correlated with firm performance, but its components exploration and exploitation were, albeit in opposite directions. Overall, our work ads nuanced insights to the antecedents and effects of organizational ambidexterity in transitional economies. KW - Organizational ambidexterity KW - Firm performance KW - Transitional economies KW - Upper echelon theory KW - TMT's innovation orientation KW - Organizational innovation culture Y1 - 2025 U6 - https://doi.org/10.1016/j.techsoc.2025.102939 VL - 82 SP - 1 EP - 15 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Karich, Alexander A1 - Cai, Hongtao A1 - Linhardt, Anne A1 - Antony, Anila A1 - Liers, Christiane A1 - Ullrich, René A1 - Schwaderer, Fabian A1 - Kalmbach, Johannes A1 - Scheibner, Katrin A1 - Hofrichter, Martin A1 - Synytska, Alla T1 - Conductive hairy particles with homogeneous and Janus design as carrier materials for the efficient immobilization of unspecific peroxygenases T2 - Biotechnology journal : systems & synthetic biology, nanobiotech, medicine N2 - Efficient immobilization of unspecific peroxygenases (UPOs) on hairy particles with homogeneous and Janus design possessingconductive core and polymeric shell was demonstrated. PDMAEMA brushes (hairs) with controlled chain lengths weresuccessfully grown from the conductive silver particles allowing further immobilization of enzymes and keeping their activity.The Janus design of the synthesized particles maintained the conductivity of the core material. Enzyme immobilization onbrush-modified particles was first carried out with two laccases as model enzymes [Trametes versicolor (TveLac) and Pycnoporuscinnabarinus (PciLac)] and then successfully extended to UPOs [two wild-type and one recombinant UPO from Marasmius rotula(MroUPO) and Agrocybe aegerita (AaeUPO, rAaeUPO)]. The most efficient immobilization was achieved for MroUPO on Janusparticles. The enzyme loading is reversible and could be successfully repeated after cleaning of the particles. Thus, the successfulimmobilization of an MroUPO on conductive hairy Janus particles was demonstrated for the first time. The major advantage ofthe proposed approach lies in the reusability of the enzyme and its carrier, as well as in the use of conductive core materials, whichcould be promising, for example, as material for electrochemical biosensors in future. KW - Ag particles KW - Core shell particles KW - Enzyme immobilization KW - Janus particles KW - PDMAEMA KW - Polymer brushes KW - Unspecific peroxygenases Y1 - 2025 U6 - https://doi.org/10.1002/biot.70078 SN - 1860-7314 VL - 20 IS - 7 SP - 1 EP - 12 PB - Wiley-VCH CY - Weinheim ER - TY - GEN A1 - Martin, Alexander T1 - Digital Leadership als Paradoxiebewältigung : zentrale Herausforderungen der Personalführung im digitalen Zeitalter T2 - Flensburger Hefte zu Unternehmertum und Mittelstand N2 - Unternehmen und Organisationen sind in den letzten Jahren durch neue Informations- und Kommunikationstechnologien unter erheblichen Veränderungs- und Anpassungsdruck geraten. Dabei hat sich im Zuge der Digitalisierung auch die Organisation von Erwerbsarbeit in massiver Art und Weise verändert und es ist unter anderem zu einer verstärkten Dezentralisierung von Entscheidung gekommen. Führungskräfte werden vor diesem Hintergrund sowohl als Treiber wie auch als Betroffene der Digitalisierung vor neue Herausforderungen gestellt. In dem vorliegenden Beitrag werden auf Basis ausgewählter theoretischer Überlegungen und empirischer Befunde zentrale Herausforderungen an Führungskräfte im Zeitalter der Digitalisierung herausgearbeitet. Im Fokus der Betrachtungen steht die Beobachtung, dass sich Führungskräfte im Zuge des technologischen und gesellschaftlichen Wandels mit in Teilen paradoxen Anforderungen konfrontiert sehen. Führung bedeutet vor diesem Hintergrund in erster Linie einen produktiven Umgang mit Widersprüchen. Der vorliegende Beitrag skizzierte ausgewählte Herausforderungen an Führungskräfte im Zeitalter der Digitalisierung und zeigt etwaige Möglichkeiten zum praktischen Umgang mit diesen widersprüchlichen Herausforderungen auf. Rekurriert wird in diesem Zusammenhang insbesondere auf die Konzepte des Paradoxical Leader Behaviors und des Paradoxical Mindets. KW - Digitalisierung KW - Personalführung KW - Paraxodien KW - Widersprüche KW - Paradoxcial Leader Behavior KW - Paradoxcial Mindset Y1 - 2025 UR - https://hdl.handle.net/10419/327152 U6 - https://doi.org/10419/327152 SN - 2196-3347 VL - 2025 IS - 22 SP - 1 EP - 22 ER - TY - GEN A1 - Martin, Alexander A1 - Müllenborn, Tim T1 - Organisationaler Wandel und psychische Beanspruchung von Beschäftigten: Der vermittelnde Einfluss von Arbeitsanforderungen und Arbeitsautonomie N2 - Als Belastungsfaktor scheint organisationaler Wandel in nicht unerheblichem Maße zu einer psychischen Beanspruchung von Beschäftigten und einer Verminderung ihres Wohlbefindens beizutragen. Hierbei stellt sich unter anderen die Frage, wie genau organisationaler Wandel das Wohlbefinden von Beschäftigten beeinflusst. In dieser Arbeit wird der vermittelnde Einfluss von Arbeitsanforderung und Arbeitsautonomie auf den Zusammenhang zwischen organisationalem Wandel und psychischer Beanspruchung betrachtet. Mittels Daten der BIBB/BAuA-Erwerbstätigenbefragungen aus den Jahren 2012 und 2018 wurde dieser Zusammenhang getestet. Die Ergebnisse legen den Schluss nahe, dass organisationaler Wandel sowohl einen direkten negativen Einfluss auf das psychische Wohlbefinden von Beschäftigten besitzt als auch mit einer Erhöhung der an sie gestellten Arbeitsanforderungen einhergeht. Gleichzeitig führen erhöhte Arbeitsanforderungen zu einer Verringerung des psychischen Wohlbefindens, während sich eine Erhöhung der Arbeitsautonomie positiv auf das Wohlbefinden von Beschäftigten auswirkt. Vor diesem Hintergrund sollten Organisationen ihre Beschäftigten durch die Zurücknahme übertriebener Arbeitsanforderungen und die Einräumung weitreichender Entscheidungsspielräume psychisch entlasten. KW - Organisationaler Wandel KW - Psychische Beanspruchung KW - Arbeitsanforderungen KW - Arbeitsautonomie KW - Quantitative Untersuchung Y1 - 2024 UR - https://www.econstor.eu/handle/10419/299219 SN - 2196-3347 IS - 21 SP - 1 EP - 30 ER - TY - GEN A1 - Dreher, Carsten A1 - Martin, Alexander T1 - Innovationsmanagement Y1 - 2011 PB - Deutsche Universität für Weiterbildung CY - Berlin ER - TY - RPRT A1 - Nadarević, Sabine A1 - Martin, Alexander T1 - A comparative study on the institutional determinants of social entrepreneurial activity N2 - Social entrepreneurship intrigues researchers as well as practitioners because of its unique character: Social entrepreneurs apply business strategies to achieve a social mission and add value to society. As a young field of research, social entrepreneurship is still dominated by conceptual work and qualitative studies. By using the data of the Global Entrepreneurship Monitor (GEM 2009) and additional data sources, this study applies a comparative research design and investigates the determinants of social entrepreneurial activity. Following recent calls, it focuses on the impact of capitalism on social entrepreneurial activity on the national level. The objective of this study therefore is to investigate whether cross-country variations in social entrepreneurial activity can be explained by incorporating the type of capitalism. Drawing on institutional theory and on ideas derived from the debate on the varieties of capitalism, the joint impact of gender equality, post-materialism (both supply factors) and capitalism (demand factor) is investigated. Performing hierarchical multiple regressions (n=39), our results show that all factors contribute to explaining cross-country variations in social entrepreneurial activity, but they do so in different ways. In line with research, our study supports the finding that post-materialism unfolds the greatest impact on social entrepreneurial activity. The impact of gender equality is less clear and, overall, weaker. Capitalism itself, however, has no direct impact on social entrepreneurial activity. Instead, this factor seems to leverage the effect of post-materialism on social entrepreneurial activity. Based on these findings, we conclude that demand factors (such as capitalism) seem to play an important role in facilitating the impact of supply factors (such as post-materialism). It appears that demand factors do not work independently from supply factors, while the opposite seems to be valid. We further conclude that it is insufficient to have given demands for social entrepreneurial activity. Rather, demand for social entrepreneurial activity must be acknowledged, recognized, and valued as an opportunity for social entrepreneurship. Y1 - 2020 UR - https://www.econstor.eu/bitstream/10419/248451/1/1782418512.pdf UR - https://www.econstor.eu/handle/10419/248451 PB - Dr. Werner Jackstädt-Zentrum für Unternehmertum und Mittelstand CY - Flensburg ER - TY - RPRT A1 - Messer, Julia A1 - Martin, Alexander T1 - Open Innovation in KMU : eine empirische Analyse ausgewählter Faktoren N2 - Die vorliegende Arbeit liefert einen Beitrag zum näheren Verständnis über die Treiber von Open Innovation in kleineren und mittleren Unternehmen (KMU). Im Vordergrund der Überlegungen steht die Frage, welche Faktoren zur Einführung von Open Innovation in KMU führen. Zur Beantwortung der Forschungsfrage wurde in enger Anlehnung an Drechsler und Natter (2012) ein Modell entwickelt, welches Wettbewerbsintensität, F&E-Intensität und Internationalisierung als zentrale Prädiktoren für Open Innovation betrachtet. Zur Überprüfung des Modells wurden drei Hypothesen formuliert und mittels einer hierarchischen Regressionsanalyse empirisch überprüft. Datenbasis bildet das Mannheimer Innovationpanel 2013. Die Stichprobe umfasst 1.514 innovative KMU mit Sitz in Deutschland. Die empirische Analyse konnte die bisherigen Forschungsergebnisse in weiten Teilen bestätigen, zeigt aber auch gewisse Unterschiede zu bisherigen Erkenntnissen auf. Der F&E-Intensität kommt als Treiber von Open Innovation in KMU der größte Einfluss zu, Internationalisierung besitzt hingegen den geringsten Einfluss. Insgesamt ist jedoch festzustellen, dass durch die drei berücksichtigen Faktoren nur 18,5 Prozent der vorgefundenen Varianz in Bezug auf Open Innovation in KMU erklärt werden können. Das heißt, es sind zukünftig weitere Faktoren für das Verständnis über die relevanten Treiber von Open Innovation in KMU heranzuziehen. Y1 - 2019 UR - https://www.econstor.eu/handle/10419/196169 UR - https://www.econstor.eu/bitstream/10419/196169/1/1663668507.pdf PB - Dr. Werner Jackstädt-Zentrum für Unternehmertum und Mittelstand CY - Flensburg ER - TY - GEN A1 - Martin, Alexander A1 - Keller, Arne A1 - Fortwengel, Johann T1 - Introducing conflict as the microfoundation of organizational ambidexterity T2 - Strategic organization N2 - This article contributes to our understanding of organizational ambidexterity by introducing conflict as its microfoundation. Existing research distinguishes between three approaches to how organizations can be ambidextrous, that is, engage in both exploitation and exploration. They may sequentially shift the strategic focus of the organization over time, they may establish structural arrangements enabling the simultaneous pursuit of being both exploitative and explorative, or they may provide a supportive organizational context for ambidextrous behavior. However, we know little about how exactly ambidexterity is accomplished and managed. We argue that ambidexterity is a dynamic and conflict-laden phenomenon, and we locate conflict at the level of individuals, units, and organizations. We develop the argument that conflicts in social interaction serve as the microfoundation to organizing ambidexterity, but that their function and type vary across the different approaches toward ambidexterity. The perspective developed in this article opens up promising research avenues to examine how organizations purposefully manage ambidexterity. KW - Conflict management KW - Conflicts KW - Exploitation and exploration KW - Microfoundation KW - Organizational ambidexterity KW - Tensions Y1 - 2019 U6 - https://doi.org/10.1177/1476127017740262 SN - 1741-315X SN - 1476-1270 VL - 17 IS - 1 SP - 38 EP - 61 PB - Sage CY - London ER - TY - CHAP A1 - Martin, Alexander A1 - Behrends, Thomas ED - Müller, David T1 - Strukturentwicklung als Führungsaufgabe in KMU : die betriebsgrößenbedingte Entwicklung organisationaler Führungsfähigkeiten T2 - Controlling für kleine und mittlere Unternehmen Y1 - 2017 SN - 978-3-11-051487-2 SP - 288 EP - 310 PB - De Gruyter Oldenbourg CY - Berlin ET - 2., überarbeitete und erweiterte Auflage ER - TY - JOUR A1 - Martin, Alexander T1 - Kurzrezension zu Hochmann, Lars (2016): Die Aufhebung der Leblosigkeit : eine praxis- und naturtheoretische Dekonstruktion des Unternehmerischen (Metropolis) Y1 - 2018 SN - 2625-5421 VL - 33 IS - 2 SP - 56 PB - Ökologisches Wirtschaften CY - München ER - TY - RPRT A1 - Martin, Alexander T1 - Gesellschaftliche Individualisierung und betriebliche Innovation : Überlegungen zu Gegenstand und Auswirkungen einer überdehnten Instrumentalisierung von Subjektivität in der Arbeitswelt N2 - Dieser in Teilen essayistisch gehaltene Aufsatz greift die aktuell geführte Diskussion über die Veränderung der betrieblichen Organisation von Erwerbsarbeit in Zeiten eines "flexiblen Kapitalismus" (Sennett 1998) auf und wirft einen Blick auf zentrale Merkmale, Ursachen und Konsequenzen dieser Entwicklung. Vor dem Hintergrund eines spätestens seit den 1960er Jahren auszumachenden soziostrukturellen und soziokulturellen Gesellschaftswandels einerseits, sowie verschärften ökonomischen Wettbewerbsbedingungen andererseits, wird in diesem Beitrag die veränderte Erzeugung organisationaler Bindung und Kontrolle einer kritischen Analyse unterzogen. Gegenstand und Ausgangspunkt der Überlegungen bildet der durch neoliberale Transformationsbemühungen semantisch als "Befreiungsprojekt" (Dörre 2012, S. 63) aufgeladene Kontroll- und Bindungsmechanismus der Selbstverwirklichung. Aus der nunmehr gegebenen Möglichkeit, neue Arbeits- und Organisationskonzepte als freiwillige Gabe und Zugewinn individueller Handlungsautonomie gegenüber den Beschäftigten darstellen zu können, resultiert eine in der Reziprozität des sozialen Handelns angelegte Verpflichtung zum Arbeiten in eben diesen neuen Strukturen. Betriebliche Bindung und Kontrolle werden somit über die Idee der Reziprozität als subversiv wirkender Integrationsmodus ermöglicht. Die Überlegungen münden in der These, dass die mittels einer überdehnten instrumentalisierten Subjektivierung von Arbeit erzeugte Bindung und Kontrolle die unternehmerische Innovations- und Wettbewerbsfähigkeit langfristig zu vermindern droht. Mit der hier in Anschlag gebrachten Argumentation wird also der dysfunktionale Charakter einer überdehnten "Instrumentalisierung von Subjektivität" (Kocyba 2000) angesprochen. Problematisch scheint in diesem Zusammenhang vor allem die ökonomische Fundierung zu sein, die in letzter Konsequenz zur Homogenisierung sowie Individualisierung und Entsolidarisierung des betrieblichen Handelns führt. Insofern droht der Kontroll- und Bindungsmechanismus nicht nur wirkungslos zu werden, sondern entfaltet gleichsam auch einen negativen Einfluss auf die unternehmerische Innovations- und Wettbewerbsfähigkeit. Der Schwerpunkt des vorliegenden Beitrags liegt auf der Analyse der diese Entwicklung konstituierenden Faktoren und Mechanismen. Insofern wird mit den Ausführungen der Grundstein gelegt, um den Gegenstand der betrieblichen "Instrumentalisierung von Subjektivität" näher bestimmen und verstehen zu können, während hingegen die Darstellung der Auswirkungen dieser Entwicklung noch weitere Ausarbeitung bedarf und hier nur schemenhaft skizziert wird. KW - Gesellschaftlicher Wandel KW - Bindung KW - Kontrolle KW - Subjektivierung von Arbeit KW - Betriebliches Sozialgefüge KW - Innovationsfähigkeit Y1 - 2015 UR - https://www.econstor.eu/bitstream/10419/114492/1/833265741.pdf UR - https://www.econstor.eu/handle/10419/114492 PB - Dr.-Werner-Jackstädt-Zentrum für Unternehmertum und Mittelstand CY - Flensburg ER - TY - THES A1 - Martin, Alexander T1 - Entwicklung organisationaler Routinen und Kompetenzen : praxistheoretische Annäherung und empirische Fundierung am Beispiel eines jungen Technologieunternehmens N2 - Routinen und Kompetenzen stellen zweifelsfrei zentrale Erklärungskategorien innerhalb der ressourcenorientierten Managementforschung dar. Gleichwohl ist die dynamische Entwicklung organisationaler Routinen und Kompetenzen bisher erst in Ansätzen mit der ihr gebührenden Tiefe und Praxisnähe thematisiert worden. Diese Feststellung nimmt sich die vorliegende Arbeit zum Ausgangpunkt ihrer Überlegungen und entwickelt einen theoretischen Bezugsrahmen, der die Entwicklung organisationaler Routinen - als Fundament organisationaler Kompetenz - näher zu beschreiben und zu verstehen erlaubt. Der theoretische Bezugsrahmen wird im weiteren Verlauf der Arbeit empirisch angewandt. Die vorliegende Einzelfallstudie zeichnet hierbei die Veränderung organisationaler Routinen in einem jungen Technologieunternehmen über einen Zeitraum von knapp drei Jahren nach und gibt einen detaillierten Einblick in die vorgefundenen organisationsinternen Prozesse und Einflussfaktoren, die der Entstehung und Veränderung organisationaler Routinen und Kompetenzen zu Grunde liegen. Das Buch richtet sich an Managementtheoretiker und Praktiker gleichermaßen. Y1 - 2012 SN - 978-3-86618-818-1 PB - Rainer Hampp Verlag CY - Mering ET - 1. Auflage ER - TY - GEN A1 - Martin, Alexander A1 - Dreher, Carsten ED - Lang, Rainhart ED - Müller, Egon T1 - Reflexive monitoring of innovation activities: process audits as a powerful method for improving the overall innovation capability of small and medium sized enterprises T2 - Proceedings : International Symposium on Innovation Methods and Innovation Management : methods, strategy, cooperation : Chemnitz 29 - 30 March 2012 Y1 - 2012 SN - 978-3-00-037763-1 SP - 35 EP - 44 PB - Technische Universität Chemnitz CY - Chemnitz ER - TY - CHAP A1 - Martin, Alexander ED - FUGO, Forschungsgruppe Unternehmen und gesellschaftliche Organisation T1 - Selbstverwirklichung und Innovation : Skizze zu einem (scheinbar) schwierigen Verhältnis T2 - Unternehmen der Gesellschaft : interdisziplinäre Beiträge zu einer kritischen Theorie des Unternehmens Y1 - 2017 UR - https://www.metropolis-verlag.de/Unternehmen-der-Gesellschaft/1243/book.do SN - 978-3-7316-1243-8 SP - 231 EP - 258 PB - Metropolis-Verlag CY - Marburg ER - TY - CHAP A1 - Behrends, Thomas A1 - Martin, Alexander ED - Albert, Martin T1 - Unternehmenskultur T2 - Organizational Behavior - Verhalten in Organisationen Y1 - 2017 SN - 978-3-17-029925-2 SN - 978-3-17-029924-5 U6 - https://doi.org/10.17433/978-3-17-029925-2 SP - 333 EP - 363 PB - Kohlhammer CY - Stuttgart ET - 2., aktualisierte und erweiterte Auflage ER - TY - CHAP A1 - Martin, Alexander A1 - Hansen, Nina Katrin ED - Stephan, Michael ED - Kerber, Wolfgang ED - Kessler, Tim ED - Lingenfelder, Michael T1 - Dynamische Kompetenz als reflexiv-kreatives Handeln T2 - 25 Jahre ressourcen- und kompetenzorientierte Forschung : der kompetenzbasierte Ansatz auf dem Weg zum Schlüsselparadigma in der Managementforschung N2 - In diesem Artikel wird ausgehend von den Gedanken des Amerikanischen Pragmatismus und den Theorien sozialer Praktiken ein verändertes Verständnis von dynamischer Kompetenz skizziert. Handeln von Akteuren wird dabei als in soziale Praktiken eingebettet betrachtet und ist durch interdependente und rekursiv aufeinander bezogene ostensive wie performative Bestandteile gekennzeichnet. Dynamische Kompetenz als bewusst-reflexiv sowie kreative Bezugnahme sozialer Akteure auf Regeln und Ressourcen (Struktur) dient dabei der Aufrechterhaltung der Handlungsfähigkeit von Organisationen in sich (radikal) verändernden Umwelten. Kompetenz und Routine hingegen verkörpern zwei, nur hinsichtlich ihres Beitrags zum Wettbewerbserfolg unterscheidbare Modi eines mehr oder weniger unbewussten Prozessierens. In einer ersten Annäherung wird ein Framework entwickelt, welches die verschiedenen Dimensionen dynamischer Kompetenz darstellt und bestimmte soziale Mechanismen mit Einfluss auf das Zustandekommen dynamischer Kompetenz als reflexives Handeln präsentiert. Y1 - 2010 SN - 978-3-8349-2192-5 U6 - https://doi.org/10.1007/978-3-8349-8856-0_3 SP - 57 EP - 85 PB - Gabler CY - Wiesbaden ET - 1. Auflage ER - TY - CHAP A1 - Dreher, Carsten A1 - Martin, Alexander ED - Laumann, Maja ED - Fröhlich, Werner T1 - Grenzüberschreitende Bildungskooperation am Beispiel des Innovationsaudits InnoPlus+ T2 - Bildungshauptstadt Flensburg : eine Region bildet sich Y1 - 2009 SN - 978-3-86618-353-7 SN - 78-3-86618-354-4 SP - 65 EP - 78 PB - Rainer Hampp Verlag CY - München ; Mering ER -