@article{AngelstamAsplundBastianetal.2021, author = {Angelstam, Per K. and Asplund, Brita and Bastian, Olaf and Engelmark, Ola and Fedoriak, Mariia and Grunewald, Karsten and Ibisch, Pierre L. and Lindvall, Per and Manton, Michael and Nilsson, Magnus and Nilsson, Sten B. and Roberntz, Peter and Shkaruba, Anton and Skoog, Per and Soloviy, Ihor and Svoboda, Miroslav and Teplyakov, Victor and Tivell, Anders and Westholm, Erik and Zhuk, Alina and {\"O}ster, Leif}, title = {Tradition as asset or burden for transitions from forests as cropping systems to multifunctional forest landscapes: Sweden as a case study}, series = {Forest Ecology and Management}, journal = {Forest Ecology and Management}, number = {505}, publisher = {Elsevier}, issn = {0378-1127}, doi = {10.1016/j.foreco.2021.119895}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4789}, pages = {17}, year = {2021}, abstract = {Expectations of what forests and woodlands should provide vary among locations, stakeholder groups, and over time. Developing multifunctional forests requires understanding of the dynamic roles of traditions and cultural legacies in social-ecological systems at multiple levels and scales. Implementing policies about multifunctional forests requires a landscape and social-ecological perspective, and recognition of both spatial and temporal features at multiple scales. This study explores the dissemination of even-aged silviculture in central, eastern and northern Europe, and the consequences of choosing different vantage points in social-ecological systems for mapping of barriers, and to identify levers, towards multifunctional forest landscapes. Using a narrative approach, we first summarise the development of even-aged silviculture in four European regions. Next, we focus on Sweden as a keen adopter of even-aged silviculture, and identify levers at three groups of vantage points. They were (1) biosphere with biodiversity as short-hand for composition, structure and function of ecosystems, which support human well-being at multiple scales; (2) society in terms of different levels of stakeholder interactions from local to global, and (3) economy represented by value chain hierarchies and currencies. The emergence of even-aged silviculture >200 years ago formed an expanding frontier from central to northern Europe. Sustained yield wood production and biodiversity conservation encompass different portfolios of ecosystem aspects and spatio-temporal scales. Ignorance and lack of knowledge about these differences enforce their mutual rivalry. An exploratory review of six groups of stakeholders at multiple levels in the traditional industrial forest value chain highlights inequalities in terms of distribution of income and power across different levels of governance. This effectively marginalises other than powerful industrial actors. The distribution of financial results along the value chain is dynamic in space and time, and not all benefits of forest ecosystems can be measured using monetary valuation. There are also other currencies and incentives. A discussion of cultural trajectories in central and eastern European, Russian and Swedish forest management illustrates that forest history patterns repeat themselves. Longitudinal case studies of countries and regions can help foster holistic multi-dimensional and multi-level systems thinking. Application of deep levers of change is likely to require external drivers. A key challenge is to handle the manufacturing of doubt and decay of truth, i.e., the appearance of alternative facts, and the diminishing role of evidence and systems analyses in political and civic discourses. This transition is fuelled by new and rapidly evolving digital arenas.}, language = {en} } @inproceedings{deMiguelDiezTolosanaEstebanCremer2021, author = {de Miguel-D{\´i}ez, Felipe and Tolosana-Esteban, Eduardo and Cremer, Tobias}, title = {3D-Simulation of Wood Stacks to Analyze the Influence of Log Properties on Stack Volume}, series = {Environmental Sciences Proceeding}, booktitle = {Environmental Sciences Proceeding}, number = {3(1)}, publisher = {MDPI}, issn = {2673-4931}, doi = {10.3390/IECF2020-08063}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4452}, pages = {6}, year = {2021}, abstract = {The quantification of the solid wood content in a wood stack has been an object of investigation since the 18th century. Particularly, the log parameters exert a considerable influence on the volume of the stack, such as (1) the log midpoint diameter, (2) average bark thickness, (3) crookedness, and (4) log taper. Although many of these parameters have already been studied and some are already considered in many countries when measuring wood stacks, their influence has not been analyzed individually so far since a broad statistical database is needed and the data collection is very costly. Consequently, a 3D-simulation model was developed based on a cross-platform game engine. This model generates virtual wood stacks based on a data set of logs which are defined by the user. The simulation of a stack can be done in a few seconds only and each stack generated can be visualized once all iterations are done. The simulation results are the stacked cubic volume, solid wood cubic volume, and the respective conversion factors. The model, fed with both real data and user-defined data, allows for a detailed analysis of the effect of each parameter on the results, as the user can vary their values discretionary. To obtain the first results from real data, 1000 logs of Scots pine (Pinus sylvestris L.) were measured. The first simulations based on these data show reliable results and it is possible to quantify the influence of the proportion of crooked wood in a pile on the stack volume and the conversion factor. In addition, the results are highly in line with the real trials that have already been performed in parallel. A further scientific evaluation and statistical analysis will be done in a second study phase. However, the model already provides a reasonable tool that is easy to apply for the forest and wood industry in order to make the most accurate estimate possible of the solid wood content in a wood pile.}, language = {en} } @inproceedings{deMiguelDiezRederWalloretal.2021, author = {de Miguel-D{\´i}ez, Felipe and Reder, Stefan and Wallor, Evelyn and Bahr, Henrik and Mund, Jan-Peter and Cremer, Tobias}, title = {Long Range and High-Speed Personal Laser Scanning (PLS) and Simultaneous Localization and Mapping (SLAM) Technology in Roundwood Measurement}, series = {Proceedings of the SilviLaser Conference 2021}, booktitle = {Proceedings of the SilviLaser Conference 2021}, doi = {10.34726/wim.1929}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4462}, pages = {3}, year = {2021}, language = {en} } @article{deMiguelDiezGuiguePettenkoferetal.2022, author = {de Miguel-D{\´i}ez, Felipe and Guigue, Phillippe and Pettenkofer, Tim and Tolosana-Esteban, Eduardo and Purf{\"u}rst, Thomas and Cremer, Tobias}, title = {Development and evaluation of a novel 3D simulation software for modelling wood stacks}, series = {PLoS ONE}, journal = {PLoS ONE}, number = {17(3)}, issn = {1932-6203}, doi = {10.1371/journal.pone.0264414}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4472}, pages = {17}, year = {2022}, abstract = {Assessing the solid wood content is crucial when acquiring stacked roundwood. A frequently used method for this is to multiply determined conversion factors by the measured gross volume. However, the conversion factors are influenced by several log and stack parameters. Although these parameters have been identified and studied, their individual influence has not yet been analyzed using a broad statistical basis. This is due to the considerable financial resources that the data collection entails. To overcome this shortcoming, a 3D-simulation model was developed. It generates virtual wood stacks of randomized composition based on one individual data set of logs, which may be real or defined by the user. In this study, the development and evaluation of the simulation model are presented. The model was evaluated by conducting a sensitivity and a quantitative analysis of the simulation outcomes based on real measurements of 405 logs of Norway spruce and 20 stacks constituted with these. The results of the simulation outcomes revealed a small overestimation of the net volume of real stacks: by 1.2\% for net volume over bark and by 3.2\% for net volume under bark. Furthermore, according to the calculated mean bias error (MBE), the model underestimates the gross volume by 0.02\%. In addition, the results of the sensitivity analysis confirmed the capability of the model to adequately consider variations in the input parameters and to provide reliable outcomes.}, language = {en} } @article{deMiguelDiezPettenkoferWalloretal.2022, author = {de Miguel-D{\´i}ez, Felipe and Pettenkofer, Tim and Wallor, Evelyn and Tolosana-Esteban, Eduardo and Purf{\"u}rst, Thomas and Cremer, Tobias}, title = {Influence of log and stack parameters on the conversion factors for Norway Spruce wood stacks using a 3D simulation model}, series = {International Journal of Forest Engineering}, volume = {33}, journal = {International Journal of Forest Engineering}, number = {2}, publisher = {Taylor \& Francis}, issn = {1494-2119}, doi = {10.1080/14942119.2022.2038023}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4482}, pages = {119 -- 128}, year = {2022}, abstract = {One method for estimating the solid wood content in a stack involves using conversion factors and multiplying these by the measured gross volume. The conversion factors can vary depending on several log and stack parameters. The aim of this study was to analyze eleven parameters using a 3D simulation model based on 541 measured logs of Norway spruce. To this end, 50 data sets were created from measured logs, where the parameters of interest in this study (e.g., length, crookedness, taper …) were classified according to different ranges. After that, 64 runs of simulations were carried out. In each simulation run, 150 stacks were modeled. The simulation results were compared with previous studies and with the measurement guidelines of several countries. This analysis revealed that the parameters midpoint diameter, length, crookedness, delimbing quality and the proportion of moderately and highly crooked logs in a stack have a considerable influence on the conversion factors. Taper, proportion of butt logs in a stack and stack height have a modest effect as do the proportion of tapered and crooked logs for low and high taper and low crookedness. In contrast, ovality and the proportion of logs stacked in opposite directions have a marginal influence on the conversion factors. Based on findings from these analyses, the current measurement guidelines of different countries can now be adapted to achieve a higher degree of accuracy.}, language = {en} } @article{deMiguelDiezRederWalloretal.2022, author = {de Miguel-D{\´i}ez, Felipe and Reder, Stefan and Wallor, Evelyn and Bahr, Henrik and Blasko, Lubomir and Mund, Jan-Peter and Cremer, Tobias}, title = {Further application of using a personal laser scanner and simultaneous localization and mapping technology to estimate the log's volume and its comparison with traditional methods}, series = {International Journal of Applied Earth Observation and Geoinformation}, journal = {International Journal of Applied Earth Observation and Geoinformation}, number = {109}, publisher = {Elsevier}, issn = {1872-826X}, doi = {10.1016/j.jag.2022.102779}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4496}, pages = {7}, year = {2022}, abstract = {The aim of this study was the development of a methodical processing line for estimating the log's volume from scanning logs using a long-range high-speed personal laser scanner (PLS) GeoSLAM ZEB HORIZON and simultaneous localization and mapping (SLAM) technology in an open-source software framework of Cloud Compare. Additionally, the accuracy and precision of using PLS and the suggested method when measuring roundwood volume was examined compared to measurements made using a xylometer and estimations obtained from applying the formulae of Huber, Smalian and Newton. For this purpose, several parameters were measured in 50 logs of Norway spruce with an average length of 2.53 m and a mean diameter of 19.97 cm. Afterwards, the volume of these 50 logs was measured with a xylometer. The results of these measurements served as reference values. The same 50 logs were subsequently scanned with the PLS. The scans were converted into point clouds and were analyzed in Cloud Compare to estimate the volume of the scanned logs. Next, the root mean square error (RMSE) and the mean bias error (MBE) as well as their relative values were calculated for the volumes determined in Cloud Compare and estimated with the above mentioned formulae. The calculated RMSE (and relative RMSE) determined a deviation of the logs' volumes estimated in Cloud Compare from the xylometric volumes of 2.88 dm3 (3.54\%) whereas the deviations of the log's volumes calculated applying the formulae of Huber, Smalian and Newton from the xylometric volumes were respectively 9.63 dm3 (11.83\%), 10.33 dm3 (12.69\%) and 4.69 dm3 (5.76\%). The calculated MBE (and relative MBE) showed that the estimated volumes in Cloud Compare and those using the formulae were overestimated, with the lowest overestimation of 0.10 dm3 (0.12\%) in Cloud Compare and the highest, 5.50 dm3 (6.75\%), using the Smalian formula. Therefore, it can be stated that results of suggested methodical processing line came closest to the logs' volumes obtained with the xylometer, i.e., they were more accurate and precise compared to the conventionally formulae for log's volume estimation. The implementation of this method has the potential filling a gap towards a wall-to-wall complete digitization of the roundwood commercialization and ensure transparency and acceptance between the stakeholders involved in the wood supply chain.}, language = {en} } @article{BartschSchleierSchultzSternbergetal.2013, author = {Bartsch, Robert and Schleier, Caroline and Schultz-Sternberg, R{\"u}diger and Ritschel, J{\"u}rgen}, title = {Auswirkungen der Klimaver{\"a}nderungen auf die brandenburgischen B{\"o}den - Expertengespr{\"a}che und Literaturrecherche}, series = {Archiv f{\"u}r Forstwesen und Landschafts{\"o}kologie}, journal = {Archiv f{\"u}r Forstwesen und Landschafts{\"o}kologie}, editor = {Landeskompetenzzentrum Forst Eberswalde (LFE), and Hochschule f{\"u}r nachhaltige Entwicklung Eberswalde (FH),}, issn = {1862-4669}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4508}, pages = {14}, year = {2013}, abstract = {Im Rahmen des Projektes „Brandenburg spezifische Boden-Indikatoren f{\"u}r ein Klimamonitoring im Rahmen der Deutschen Anpassungsstrategie (DAS) sowie Zusammenstellung von aussagef{\"a}higen Wirkungs- und Alarmschwellen" sind Kenntnisse {\"u}ber die spezifische Gef{\"a}hrdung der Brandenburger B{\"o}den zusammengestellt worden. Basierend auf den Prognosen von Gerstengarbe et al. (2003) und Zebisch et al. (2005) wird Brandenburg durch die prognostizierten Klimaver{\"a}nderungen besonders betroffen sein. Diese werden sich vor allem in Ver{\"a}nderungen in Niederschlagsverteilungen, Niederschlagsformen und steigenden Temperaturen {\"a}ußern. Besonders die Umverteilung der Niederschl{\"a}ge und steigende Temperaturen im Winterhalbjahr k{\"o}nnen den Wasserhaushalt des Bodens negativ beeinflussen (Linke et al., 2011). Eine Verringerung der Niederschl{\"a}ge im Sommerhalbjahr wird deutlich erkennbare Auswirkungen auf die bisher betriebene Landwirtschaft haben. Aufgrund der Ver{\"a}nderungen der Niederschlagsformen, mit zunehmenden Starkniederschl{\"a}gen, ist mit h{\"a}ufigerem Auftreten von Bodenerosion sowie von lokalen und regionalen Hochwasserereignissen zu rechnen. Die befragten Experten betonen, dass im Boden Nutzungs{\"a}nderungen voraussichtlich wesentlich st{\"a}rker und schneller sichtbar werden als durch {\"A}nderungen im Klima. Dadurch kann ein negativer Einfluss der Klimaver{\"a}nderungen durch fr{\"u}hzeitige Nutzungsanpassung kompensiert werden.}, language = {de} } @article{PopescuPfriem2020, author = {Popescu, Carmen-Mihaela and Pfriem, Alexander}, title = {Treatments and modification to improve the reaction to fire of wood and wood based products—An overview}, series = {Fire and Materials}, volume = {44}, journal = {Fire and Materials}, number = {1}, publisher = {Wiley}, issn = {0308-0501}, doi = {10.1002/fam.2779}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4541}, pages = {100 -- 111}, year = {2020}, abstract = {Wood and wood-based products are widely used for structural building elements, but due to their composition, they are susceptible of combusting if exposed to fire. Fire safety is an important issue of building safety, especially when the building's fire load contents enhance the risks of fire spread. Therefore, the involved materials are very important to address the fire safety requirements. When existing timber structures are involved, the most usual way to improve its reaction to fire is to treat wood with fire retardant materials. The idea of this paper is to give an overall overview, on the existing fire-retardant and intumescent coating materials, modification, and treatments that can be applied to wood and wood-based products in order to improve their reaction to fire.}, language = {en} } @article{CremerBlasko2017, author = {Cremer, Tobias and Blasko, Lubomir}, title = {Analyse der fotooptischen Vermessung von Kiefernstamm- und -industrieholz im Vergleich zum Sektionsraumaß}, series = {Allgemeine Forst- und Jagdzeitung}, volume = {188}, journal = {Allgemeine Forst- und Jagdzeitung}, number = {7/8}, publisher = {J. D. Sauerl{\"a}nder}, issn = {0002-5852}, doi = {10.23765/afjz0002008}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4551}, pages = {127 -- 139}, year = {2017}, language = {de} } @article{MensahAhiekporHeroldetal.2022, author = {Mensah, Isaac and Ahiekpor, Julius Cudjoe and Herold, Nadine and Bensah, Edem Cudjoe and Pfriem, Alexander and Antwi, Edward and Amponsem, Bright}, title = {Biomass and plastic co-pyrolysis for syngas production: Characterisation of Celtis mildbraedii sawdust as a potential feedstock}, series = {Scientific African}, journal = {Scientific African}, number = {16}, publisher = {Elsevier}, issn = {2468-2276}, doi = {10.1016/j.sciaf.2022.e01208}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4588}, pages = {9}, year = {2022}, abstract = {Celtis mildbraedii sawdust (CMS) from Ghana was characterised to investigate its suitability with polyethylene terephthalate (PET) for syngas production via co-pyrolysis. The physical and chemical properties assessed include proximate and ultimate compositions, pH value, higher heating value (HHV), and lignocellulosic composition. Also, the thermal behaviour at different heating rates (5, 10, and 20 K/min) and qualitative prediction of organic compounds of CMS were examined using thermogravimetric analysis (TG/DTG) and NIR spectroscopy techniques, respectively. Results of proximate analysis (moisture = 17.15 ± 0.0 wt.\%, ash = 1.13 ± 0.4 wt.\%, volatile matter = 68.39 ± 0.4 wt.\%, fixed carbon = 13.33 ± 0.8 wt.\%); ultimate analysis (C = 48.51 wt.\%, H = 6.66 wt.\%, N = 0.51 wt.\%, S = 0.02 wt.\%, O = 44.30 wt.\%); pH values (cold phase = 7.60, hot phase = 6.30); HHV (15.37 - 18.03 MJ/kg); and lignocellulosic composition (extractives = 13.80 ± 0.57 wt.\%, hemicellulose = 21.95 ± 3.89 wt.\%, lignin = 17.35 ± 0.35 wt.\%, cellulose = 46.90 ± 2.97 wt.\%) were obtained. The maximum mass loss was 83.48\% at 289.8 °C at 5 K/min. It was concluded that CMS is a highly potential biomass resource for syngas production with an empirical formula of CH1.64O0.69N0.009S0.0001.}, language = {en} } @article{WeissMichlerGillichetal.2022, author = {Weiss, Fabio and Michler, Frank Uwe and Gillich, Benjamin and Tillmann, J{\"o}rg and Ciuti, Simone and Heurich, Marco and Rieger, Siegfried}, title = {Displacement Effects of Conservation Grazing on Red Deer (Cervus elaphus) Spatial Behaviour}, series = {Environmental Management}, volume = {70}, journal = {Environmental Management}, publisher = {Springer Nature}, issn = {0364-152X}, doi = {10.1007/s00267-022-01697-6}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4609}, pages = {763 -- 779}, year = {2022}, abstract = {Conservation grazing uses semi-feral or domesticated herbivores to limit encroachment in open areas and to promote biodiversity. However, we are still unaware of its effects on wild herbivores. This study investigates the influence of herded sheep and goats on red deer (Cervus elaphus) spatial behavior by testing three a-priori hypotheses: (i) red deer are expected to avoid areas used by livestock, as well as adjacent areas, when livestock are present, albeit (ii) red deer increase the use of these areas when sheep and goats are temporarily absent and (iii) there is a time-lagged disruption in red deer spatial behavior when conservation grazing practice ends. Using GPS-telemetry data on red deer from a German heathland area, we modelled their use of areas grazed by sheep and goats, using mixed-effect logistic regression. Additionally, we developed seasonal resource selection functions (use-availability design) to depict habitat selection by red deer before, during, and after conservation grazing. Red deer used areas less during conservation grazing throughout all times of the day and there was no compensatory use during nighttime. This effect mostly persisted within 21 days after conservation grazing. Effects on habitat selection of red deer were detectable up to 3000 meters away from the conservation grazing sites, with no signs of either habituation or adaption. For the first time, we demonstrate that conservation grazing can affect the spatio-temporal behavior of wild herbivores. Our findings are relevant for optimizing landscape and wildlife management when conservation grazing is used in areas where wild herbivores are present.}, language = {en} } @inproceedings{BernhardGosselWill2022, author = {Bernhard, Miriam and Gossel, Britta M. and Will, Andreas}, title = {Der Zusammenhang zwischen der strategischen Technologieorientierung und dem organisationalen Lernen in Medienorganisationen}, series = {Internet-Intermedi{\"a}re und virtuelle Plattformen medien{\"o}konomisch betrachtet: Proceedings zur Jahrestagung der Fachgruppe Medien{\"o}konomie der Deutschen Gesellschaft f{\"u}r Publizistik- und Kommunikationswissenschaft 2021, Hamburg}, booktitle = {Internet-Intermedi{\"a}re und virtuelle Plattformen medien{\"o}konomisch betrachtet: Proceedings zur Jahrestagung der Fachgruppe Medien{\"o}konomie der Deutschen Gesellschaft f{\"u}r Publizistik- und Kommunikationswissenschaft 2021, Hamburg}, editor = {Deutsche Gesellschaft f{\"u}r Publizistik- und Kommunikationswissenschaft e.V.,}, doi = {10.21241/ssoar.78775.v2}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4615}, pages = {163 -- 176}, year = {2022}, abstract = {Zukunftstechnologien {\"u}ben schon seit geraumer Zeit Transformationsdruck auf Medienorganisationen aus (K{\"u}ng, 2008). Medienorganisationen sind daher gezwungen, gezielt zu reagieren, sich zu ver{\"a}ndern und zu lernen. Ein theoretisches Konstrukt, das diesen Prozess erkl{\"a}rt, ist die Theorie des organisationalen Lernens (OL) (Senge, 2006). In der allgemeinen Managementforschung ist OL bereits ein etablierter theoretische Ansatz (Dick, 2005), bei Medienorganisationen wurde OL bislang kaum erforscht (Bernhard \& Will, 2021). Die strategische Orientierung der Organisation stellt eine M{\"o}glichkeit zur F{\"o}rderung des OL dar (Se{\c{c}}kin-Hala{\c{c}}, 2019). Insbesondere die strategische Technologieorientierung (TO) k{\"o}nnte in Anbetracht von Zukunftstechnologien hilfreich f{\"u}r OL sein (ebd.). Vor diesem Hintergrund besch{\"a}ftigt sich dieser Beitrag mit der folgenden Frage: Besteht ein Zusammenhang zwischen der Technologieorientierung (TO) und dem organisationalen Lernen (OL) in Medienorganisationen? Zur Beantwortung dieser Frage wurde eine explorative Onlineumfrage (Zeitraum: Dez. 2020 bis Jan. 2021) unter deutschen Medienmanager*innen (N=46) durchgef{\"u}hrt. F{\"u}r die Untersuchung wurden die Instrumente von Hakala \& Kohtam{\"a}ki (2011) f{\"u}r die TO und von Marsick \& Watkins (2003) f{\"u}r das OL {\"u}bernommen. Die Umfragedaten wurden mithilfe der Rangkorrelation nach Spearman analysiert. Kernergebnis der Untersuchung ist, dass ein signifikanter Zusammenhang zwischen TO und OL besteht.}, language = {de} } @article{Gossel2022, author = {Gossel, Britta M.}, title = {Analogies in Entrepreneurial Communication and Strategic Communication: Definition, Delimitation of Research Programs and Future Research}, series = {International Journal of Strategic Communication}, volume = {16}, journal = {International Journal of Strategic Communication}, number = {2}, publisher = {Taylor \& Francis}, issn = {1553-118X}, doi = {10.1080/1553118X.2021.2015689}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4659}, pages = {134 -- 156}, year = {2022}, abstract = {This article aims to build a better understanding of entrepreneurial communication and strategic communication. The term entrepreneurial is finding its way into the discussion of communication science in general and strategic communication in particular, for example, through the consideration of startups. So far, the term entrepreneurial communication remains vague, is hardly defined and is not systematically distinguished from strategic communication. By applying an analogies lens in the context of problematizing, differences between the terms entrepreneurial and strategic in entrepreneurial communication and strategic communication are explored based on selected given definitions. As a result, three unifying dimensions - development stage, mode, and logic - are developed to highlight fundamental differences between the two terms. To create potential for a future creation of entrepreneurial communication as research program, and to elaborate on future potential for strategic communication in relation to this, central theoretical approaches in entrepreneurship research and their potential to research entrepreneurial communication are explored.}, language = {en} } @techreport{BernhardGosselWill2022, type = {Working Paper}, author = {Bernhard, Miriam and Gossel, Britta M. and Will, Andreas}, title = {Rigor and Relevance : Enforcing dialogue between media management research and practice}, series = {Diskussionspapiere Menschen, M{\"a}rkte, Medien, Management}, journal = {Diskussionspapiere Menschen, M{\"a}rkte, Medien, Management}, number = {Band 3}, doi = {10.22032/dbt.51630}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4667}, pages = {31}, year = {2022}, abstract = {There is a strong demand in media management to strengthen the bridge between theory and practice. Following the debate on rigor and relevance, the approach of engaged scholarship and arguments from our community, we see the need to develop a research agenda in dialogue with practice. Therefore, we explore the following questions: Which topics do media managers consider relevant to research? How can these issues be contrasted with the research agendas proclaimed by media management research? To answer these questions, we first summarize current issues in media management research through a literature review. Second, current issues in media management practice are captured based on an online survey with German media managers (N=46). Finally, the two perspectives are contrasted to develop relevant questions for media management research and practice.}, language = {en} } @article{DonatGeistertGrahmannetal.2022, author = {Donat, Marco and Geistert, Jonas and Grahmann, Kathrin and Bloch, Ralf and Bellingrath-Kimura, Sonoko D.}, title = {Patch cropping- a new methodological approach to determine new field arrangements that increase the multifunctionality of agricultural landscapes}, series = {Computers and Electronics in Agriculture}, journal = {Computers and Electronics in Agriculture}, number = {197}, publisher = {Elsevier}, issn = {0168-1699}, doi = {10.1016/j.compag.2022.106894}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4365}, pages = {1 -- 15}, year = {2022}, abstract = {Agricultural intensification decreased land cover complexity by converting small complex arable field geometries into large and simple structures which then were managed uniformly. These changes have led to a variety of negative environmental effects and influence ecosystem services. We present a novel small-scale and site-specific cropping system which splits a large field into small homogeneous sub-fields called 'patches' grouped in different yield potentials. A detailed workflow is presented to generate new spatially arranged patches with special focus on preprocessing and filtering of multi-year yield data, the variation in patch sizes and the adaptation of maximum working width to use available conventional farm equipment and permanent traffic lanes. The reduction of variance by the used cluster algorithm depends on the within-field heterogeneity. The patch size, the number of growing seasons (GS) used for clustering and the parallel shift of the patch structure along the permanent traffic lane resulted in a change in relative variance. Independent cross validation showed an increased performance of the classification algorithm with increasing number of GS used for clustering. The applied cluster analysis resulted in robust field segregation according to different yield potential zones and provides an innovative method for a novel cropping system.}, language = {en} } @article{SchaeferHaack2023, author = {Sch{\"a}fer, Martina and Haack, Michaela}, title = {Overcoming the efficiency paradigm—The challenges of introducing local organic beef in canteens}, series = {Frontiers in Sustainable Food Systems}, volume = {7}, journal = {Frontiers in Sustainable Food Systems}, publisher = {Frontiers Media S.A.}, issn = {2571-581X}, doi = {10.3389/fsufs.2023.1152185}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4395}, year = {2023}, abstract = {Introduction In recent years, there has been a growing recognition that public canteens can play an important role in supporting the transformation toward sustainable food systems and providing access to sustainable and healthy food for everybody—including the most vulnerable groups of the population. One important way in which canteens can contribute to this transformation is by increasing the share of organic and local products. These new political and public demands contrast with the organizational development of canteens over the past few decades, which has mainly been characterized by an increase in economic efficiency and a reduction in costs. Based on a project that was carried out in the Berlin-Brandenburg region (Germany), this paper exemplifies some of the challenges canteens face in the process of introducing organic and local products. Methods The empirical results are based on 31 qualitative interviews with canteen managers and kitchen staff as well as with the processing company involved. In addition, a survey of 500 canteen guests was conducted in the participating canteens. Results The analysis shows that the canteens had to adapt various organizational practices to ensure a healthy and sustainable diet at manageable cost. Introducing local organic beef in the canteens requires close cooperation with local farmers and processors, a change in procurement practices, transparency around the origin of the products, as well as adapted menu planning. Discussion Based on the empirical results, the paper discusses how these challenges can be met and which supportive measures can be taken on different governance levels. To change entrenched practices, process facilitators who support local cooperation along the value added chain are needed, and practical knowledge and professional training must be provided. The article concludes that there is a great potential to foster a sustainable and healthy diet via public and private canteens if the tension between efficiency and sustainability orientation can be overcome by adapting framework conditions.}, language = {en} } @article{BashutskaCremer2020, author = {Bashutska, U. B. and Cremer, Tobias}, title = {Екологічне оцінювання деревини робінії звичайної та рекультивованих відвалів шахт як резервної території для її вирощування}, series = {Scientific Bulletin of UNFU}, volume = {30}, journal = {Scientific Bulletin of UNFU}, number = {3}, issn = {1994-7836}, doi = {10.36930/40300309}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4433}, pages = {51 -- 59}, year = {2020}, abstract = {Раціональне користування природними ресурсами є необхідним для сталого розвитку. Потребою сьогодення є використання екологічної сировини, яка спричиняє мінімальний вплив на довкілля та здоров'я людини під час її виробництва, використання й утилізації. Проаналізовано екологічну цінність деревини робінії звичайної на підставі вивчення її застосування та ринків збуту у Німеччині. Відзначено подібність її деревини за хімічним складом і властивостями із деревиною тропічних видів дерев, а також можливість заготівлі екологічно сприйнятливими способами. Вивчено можливість вирощування цього інтродукованого виду рослин на рекультивованих породних відвалах за умови екологічного моніторингу. Опрацьовано інформацію про насадження робінії звичайної у північно-східній низовині Німеччини. Проаналізовано будову, властивості деревини робінії та її можливе використання. Розглянуто принципи сортування та відповідні критерії якості деревини робінії. Здійснено порівняння ринків робінії у Бранденбурзі (Німеччина) та Угорщині. Запропоновано заходи щодо збільшення використання робінії. Розглянуто порушені землі Малого Полісся, як резервні території отримання екологічної деревини робінії звичайної. Екологічно обґрунтованим є відведення для цього порушених добуванням вугілля територій у сприятливих лісорослинних районах. Фітомеліоративні властивості робінії звичайної роблять її перспективним видом для залісення новоутворених екотопів із широкою екологічною амплітудою в умовах Малого Полісся. Наявність насипних рекультиваційних ґрунтів є необхідною умовою для приживання та рівномірного росту і розвитку робінієвих культур в умовах породних відвалів шахт. Якість та продуктивність робінієвих насаджень залежать від фізико-хімічних властивостей шарів насипних ґрунтів та мікрокліматичних особливостей екотопів відвалів. Це зумовлює відмінності в рості й розвитку робінієвих насаджень, впливає на показники якості деревини робінії і зумовлює шляхи її можливого використання. Меліоративна функція робінієвих насаджень на післягірничих ландшафтах є особливо важливою у час зміни клімату. Продуктивна функція робінієвих насаджень на післягірничих ландшафтах дає підставу розглядати їх як додаткове джерело біологічно стійкої деревини.}, language = {mul} } @article{BoeneckeMeyerVogeletal.2020, author = {B{\"o}necke, Eric and Meyer, Swen and Vogel, Sebastian and Schr{\"o}ter, Ingmar and Gebbers, Robin and Kling, Charlotte and Kramer, Eckart and L{\"u}ck, Katrin and Nagel, Anne and Philipp, Golo and Gerlach, Felix and Palme, Stefan and Scheibe, Dirk and Zieger, Karin and R{\"u}hlmann, J{\"o}rg}, title = {Guidelines for precise lime management based on high-resolution soil pH, texture and SOM maps generated from proximal soil sensing data}, series = {Precision Agriculture}, volume = {22}, journal = {Precision Agriculture}, publisher = {Springer Nature}, issn = {1385-2256}, doi = {10.1007/s11119-020-09766-8}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4890}, pages = {493 -- 523}, year = {2020}, abstract = {Soil acidification is caused by natural paedogenetic processes and anthropogenic impacts but can be counteracted by regular lime application. Although sensors and applicators for variable-rate liming (VRL) exist, there are no established strategies for using these tools or helping to implement VRL in practice. Therefore, this study aimed to provide guidelines for site-specific liming based on proximal soil sensing. First, high-resolution soil maps of the liming-relevant indicators (pH, soil texture and soil organic matter content) were generated using on-the-go sensors. The soil acidity was predicted by two ion-selective antimony electrodes (RMSEpH: 0.37); the soil texture was predicted by a combination of apparent electrical resistivity measurements and natural soil-borne gamma emissions (RMSEclay: 0.046 kg kg-1); and the soil organic matter (SOM) status was predicted by a combination of red (660 nm) and near-infrared (NIR, 970 nm) optical reflection measurements (RMSESOM: 6.4 g kg-1). Second, to address the high within-field soil variability (pH varied by 2.9 units, clay content by 0.44 kg kg-1 and SOM by 5.5 g kg-1), a well-established empirical lime recommendation algorithm that represents the best management practices for liming in Germany was adapted, and the lime requirements (LRs) were determined. The generated workflow was applied to a 25.6 ha test field in north-eastern Germany, and the variable LR was compared to the conventional uniform LR. The comparison showed that under the uniform liming approach, 63\% of the field would be over-fertilized by approximately 12 t of lime, 6\% would receive approximately 6 t too little lime and 31\% would still be adequately limed.}, language = {en} } @article{HorfBoeneckeGebbersetal.2023, author = {Horf, Michael and B{\"o}necke, Eric and Gebbers, Robin and Kling, Charlotte and Kramer, Eckart and R{\"u}hlmann, J{\"o}rg and Schr{\"o}ter, Ingmar and Schwanghart, Wolfgang and Vogel, Sebastian}, title = {Utility of visible and near-infrared spectroscopy to predict base neutralizing capacity and lime requirement of quaternary soils}, series = {Precision Agriculture}, volume = {24}, journal = {Precision Agriculture}, publisher = {Springer Nature}, issn = {1385-2256}, doi = {10.1007/s11119-022-09945-9}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4916}, pages = {288 -- 309}, year = {2023}, abstract = {Detailed knowledge of a soil's lime requirement (LR) is a prerequisite for a demand-based lime fertilization to achieve the optimum soil pH and thus sustainably increasing soil fertility and crop yields. LR can be directly determined by the base neutralizing capacity (BNC) obtained by soil-base titration. For a site-specific soil acidity management, detailed information on the within-field variation of BNC is required. However, soil-base titrations for BNC determination are too laborious to be extensively applied in routine soil testing. In contrast, visible and near-infrared spectroscopy (visNIRS) is a time and cost-effective alternative that can analyze several soil characteristics within a single spectrum. VisNIRS was tested in the laboratory on 170 air-dried and sieved soil samples of nine agricultural fields of a quaternary landscape in North-east Germany predicting the soil's BNC and the corresponding lime requirement (LRBNC) at a target pH of 6.5. Seven spectral pre-processing methods were tested including a new technique based on normalized differences (ND). Furthermore, six multivariate regression methods were conducted including a new method combining a forward stagewise subset selection algorithm with PLSR (FS-PLSR). The models were validated using an independent sample set. The best regression model for most target variables was FS-PLSR combined with the second Savitzky-Golay derivation as pre-processing method achieving R2s from 0.68 to 0.82. Finally, the performance of the direct prediction of LRBNC (R2 = 0.68) was compared with an indirect prediction that was calculated by the predicted BNC parameters. This resulted in slightly higher correlation coefficients for the indirect method with R2 = 0.75.}, language = {en} } @article{WeissLinde2022, author = {Weiss, Fabio and Linde, Andreas}, title = {How to estimate carabid biomass?—an evaluation of size-weight models for ground beetles (Coleoptera: Carabidae) and perspectives for further improvement}, series = {Journal of Insect Conservation}, volume = {26}, journal = {Journal of Insect Conservation}, publisher = {Springer Nature}, issn = {1366-638X}, doi = {10.1007/s10841-022-00391-6}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-4983}, pages = {537 -- 548}, year = {2022}, abstract = {Biomass is an important metric for monitoring carabid populations and serves as an ecological indicator. Models that predict carabid weight based on body size represent a simple and straightforward method to estimate biomass and are therefore commonly used. However, such models are rarely evaluated against independent validation data. In this study, we evaluated the two widely used size-weight models by Szyszko (1983) and Booij et al. (1994) drawing on previously published independent data. Additionally, we developed and tested four new models to also evaluate the potential effect of taxonomic parameters; and compared model predictions with actual measurements of biomass using relative deviation graphs and observed versus predicted from regression. We show that the two models by Szyszko (1983) and Booij et al. (1994) contain systematic bias towards larger and smaller carabids, respectively, suggesting restricted applicability of such models. Additional taxonomic parameters improved weight predictions, indicating one possible solution to the issue of restricted applicability. We discuss further relevant limitations of size-weight models and their application and recommend a combined use of the models of Szyszko (1983) and Booij et al. (1994) for carabids ≥ 11.8 mm and < 11.8 mm, respectively. Implications for insect conservation: Size-weight models are a suitable and simple method to estimate the biomass of carabids and have great potential to be used in monitoring schemes, the investigation of long-term trends and ecological studies. It is, however, essential that researchers pay special attention to potential restrictions in their applicability and methodological limitations.}, language = {en} }