TY - INPR A1 - Amat, A. A1 - Halimah, M. K. A1 - Ishak, M. A1 - Nazrin, S. N. A1 - Syamimi, Nik Nur A1 - Hasnimulyati, L. T1 - Electronic Polarizability and Optical Basicity of BaO-B2O3-TeO2 Glass System N2 - [(TeO2)0.7(B2O3)0.3]1-x (BaO)x, x = 0.00, 0.05, 0.10, 0.20, 0.25, 0.30 and 0.35 mol fraction glass series were successfully synthesized by conventional melt quenching method. Amorphous phase of all samples was confirmed through X-ray diffraction while optical properties were determined using UV-VIS spectrophotometer. Fourier Transform Infrared (FTIR) analysis showed that the glass structure consisted of TeO3, TeO4, TeO6, BO3 and BO4 structural units. The optical band gap energy, Eopt which was calculated from Tauc’ plots decreased as the amount of BaO increases, whereas, the Urbach energy value increased. The increase in Urbach energy value was attributed to the increase of defects in glass structure. The refractive indices of glass were found to increase along with the increased amount of BaO, due to the high polarization and high density of host material and glass modifier. The molar polarizability, αm, oxide ion polarizability, αo2- and optical basicity, Λ of the glasses are calculated by Lorentz-Lorenz equation. The glasses were found to possess αm values between 8.106 – 8.489 Å3, and αo2- values between 3.303 to 4.772. Meanwhile, optical basicity increases from 0.115 to 0.893.

Y1 - 2021 U6 - https://doi.org/10.21203/rs.3.rs-1093838/v1 ET - Version 1, posted 30 Nov, 2021 ER - TY - CHAP A1 - Rahiman, Mohd Fuad A1 - Berndt, Dominik A1 - Schreiner, Rupert T1 - Micro-wire Pirani with temperature-stabilized Environment T2 - 3. Symposium Elektronik und Systemintegration ESI 2022: 06. April 2022, Hochschule Landshut Y1 - 2022 SN - 978-3-9818439-7-2 SP - 52 EP - 59 ER - TY - GEN A1 - Schreiner, Rupert T1 - Miniaturized sensor and actuator elements based on the heat transport in gases or the ionization of gas particles T2 - 16th International Conference on Optical and Electronic Sensors, COE'2020, 29 March - 2 April 2020, Krakow, Poland (online) Y1 - 2021 ER - TY - BOOK ED - Weber, Karsten ED - Friesen, Hans ED - Zoglauer, Thomas T1 - Philosophie und Phantastik KW - Das Fantastische KW - Fantasie KW - Film KW - Literatur KW - Philosophie KW - Spiel Y1 - 2016 SN - 978-3-95743-073-1 PB - Mentis CY - Münster ER - TY - CHAP A1 - Kleshch, Victor I. A1 - Serbun, Pavel A1 - Orekhov, Anton A1 - Lützenkirchen-Hecht, Dirk A1 - Obraztsov, Alexander N. A1 - Prommesberger, Christian A1 - Langer, Christoph A1 - Schreiner, Rupert A1 - Lutzenkirchen-Hecht, Dirk T1 - Field emission properties of p-type silicon tips decorated with tungsten nanoparticles T2 - 2017 30th International Vacuum Nanoelectronics Conference (IVNC), 10-14 July 2017, Regensburg, Germany N2 - An array of conical-shaped p-type silicon tips was fabricated by using reactive ion etching and sharpening oxidation. The apex of each tip was decorated by a tungsten hemispherical nanoparticle. Field emission properties of the tips were measured by a tungsten-needle anode positioned above the tip apex. Tips decorated with tungsten nanoparticles demonstrated a smaller saturation region in current-voltage characteristics compared to the pristine tips. An emission activation process, which consisted in sudden current increase at certain value of applied voltage, was observed for the decorated silicon tips. This behavior was explained by the formation of vertical protrusions extending from the metal particles revealed by scanning electron microscopy after field emission experiments. KW - Current measurement KW - field emission KW - Ions KW - Iron KW - metal nanoparticles KW - nanoparticles KW - p-type silicon KW - Scanning electron microscopy KW - silicon KW - Tungsten Y1 - 2017 U6 - https://doi.org/10.1109/IVNC.2017.8051580 SP - 138 EP - 139 PB - IEEE ER - TY - CHAP A1 - Wick, Michael A1 - Lindner, Gerhard A1 - Zimmer, Katja A1 - Schreiner, Rupert A1 - Fuhrmann, Thomas A1 - Seebauer, Gudrun A1 - Xu, Boqing A1 - Zheng, Jihong A1 - Wang, Ning ED - Liu, Xu ED - Zhang, Xi-Cheng T1 - German-Chinese cooperative Bachelor in engineering physics/optoelectronics T2 - 14th Conference on Education and Training in Optics and Photonics: ETOP 2017; Hangzhou, China 29.05.2017 - 31.05.2017 N2 - The University of Shanghai for Science and Technology (USST), the Coburg University of Applied Sciences and Arts (CUASA) and the OTH Regensburg, University of Applied Sciences (OTHR) established an English taught international cooperative bachelor program in the area of Engineering Physics/Optoelectronics. Students from China study their first four semesters at USST. They continue their studies in Germany for the last three semesters, including an internship and a bachelor thesis, graduating with a Chinese and a German bachelor degree. Students from Germany study their third and fourth semester at USST to gain international experience. While the first cohort of Chinese students is currently in Germany, the second cohort of German students is in Shanghai. Up to now the feedback regarding this study program is completely positive, thus it is planned to develop it further. Y1 - 2017 SN - 9781510613812 U6 - https://doi.org/10.1117/12.2269943 PB - SPIE ER - TY - CHAP A1 - Knapp, Wolfram A1 - Langer, Christoph A1 - Prommesberger, Christian A1 - Lindner, Matthias A1 - Schreiner, Rupert T1 - Investigations of the transition from field electron emission to stable plasma discharge in a micro electron source at vacuum pressure T2 - 2017 30th International Vacuum Nanoelectronics Conference (IVNC), 10-14 July 2017, Regensburg, Germany N2 - We report on the transition from field electron emission to plasma discharges. During an experiment with a miniaturized field emission electron source a plasma discharge accompanied by a luminous effect was observed. A novel graphical evaluation method was used to interpret and to compare the observed phenomenon. KW - CATHODES KW - Discharges (electric) KW - electron source KW - electron sources KW - Fault location KW - field emission KW - field emission measurement KW - glow discharge KW - Glow discharges KW - micro arc KW - plasma discharge KW - Plasmas KW - Si-tip cathode Y1 - 2017 U6 - https://doi.org/10.1109/IVNC.2017.8051594 SP - 166 EP - 167 PB - IEEE ER - TY - GEN A1 - Hartmann, Julia A1 - Sattler, Florian T1 - Knowledge Nuggets in der Lehre KW - Knowledge Nuggets KW - Innovation in der Lehre Y1 - 2024 ER - TY - JOUR A1 - Wunderlich, Lukas A1 - Hausler, Peter A1 - Maerkl, Susanne A1 - Bierl, Rudolf A1 - Hirsch, Thomas T1 - Nanoparticle Determination in Water by LED-Excited Surface Plasmon Resonance Imaging JF - Chemosensors N2 - The increasing popularity of nanoparticles in many applications has led to the fact that these persistent materials pollute our environment and threaten our health. An online sensor system for monitoring the presence of nanoparticles in fresh water would be highly desired. We propose a label-free sensor based on SPR imaging. The sensitivity was enhanced by a factor of about 100 by improving the detector by using a high-resolution camera. This revealed that the light source also needed to be improved by using LED excitation instead of a laser light source. As a receptor, different self-assembled monolayers have been screened. It can be seen that the nanoparticle receptor interaction is of a complex nature. The best system when taking sensitivity as well as reversibility into account is given by a dodecanethiol monolayer on the gold sensor surface. Lanthanide-doped nanoparticles, 29 nm in diameter and with a similar refractive index to the most common silica nanoparticles were detected in water down to 1.5 mu g mL(-1). The sensor can be fully regenerated within one hour without the need for any washing buffer. This sensing concept is expected to be easily adapted for the detection of nanoparticles of different size, shape, and composition, and upon miniaturization, suitable for long-term applications to monitor the quality of water. KW - ENGINEERED NANOPARTICLES KW - imaging KW - nanoparticle KW - plasmon resonance KW - REFRACTIVE-INDEX KW - sensor KW - surface Y1 - 2021 U6 - https://doi.org/10.3390/chemosensors9070175 SN - 2227-9040 VL - 9 IS - 7 SP - 1 EP - 9 PB - MDPI ER - TY - JOUR A1 - Schreiner, Rupert A1 - Schweizer, Heinz C. T1 - High-frequency operation of 1.57-μm laterally coupled distributed feedback lasers with self-aligned ohmic contacts and nickel surface gratings JF - IEEE Journal of Selected Topics in Quantum Electronics N2 - Laterally coupled distributed feedback lasers with self-aligned ohmic contacts show the advantage of a considerably simplified fabrication process. These lasers exhibit superior spectral properties with full benefit from the gain coupling mechanism. Side-mode suppression ratios up to 55- and 3-dB bandwidths beyond 15 GHz were obtained for these devices. KW - Distributed feedback devices KW - Optical coupling KW - Laser feedback KW - Ohmic contacts KW - Nickel KW - Surface emitting lasers KW - Gratings KW - Optical device fabrication KW - Mechanical factors KW - Bandwidth Y1 - 2003 U6 - https://doi.org/10.1109/JSTQE.2003.819469 VL - 9 IS - 5 SP - 1179 EP - 1182 PB - IEEE ER - TY - JOUR A1 - Bender, Guzide A1 - Fahrioglu Yamaci, Rezan A1 - Taneri, Bahar T1 - CRISPR and KRAS: a match yet to be made JF - Journal of biomedical science N2 - CRISPR (clustered regularly interspaced short palindromic repeats) systems are one of the most fascinating tools of the current era in molecular biotechnology. With the ease that they provide in genome editing, CRISPR systems generate broad opportunities for targeting mutations. Specifically in recent years, disease-causing mutations targeted by the CRISPR systems have been of main research interest; particularly for those diseases where there is no current cure, including cancer. KRAS mutations remain untargetable in cancer. Mutations in this oncogene are main drivers in common cancers, including lung, colorectal and pancreatic cancers, which are severe causes of public health burden and mortality worldwide, with no cure at hand. CRISPR systems provide an opportunity for targeting cancer causing mutations. In this review, we highlight the work published on CRISPR applications targeting KRAS mutations directly, as well as CRISPR applications targeting mutations in KRAS-related molecules. In specific, we focus on lung, colorectal and pancreatic cancers. To date, the limited literature on CRISPR applications targeting KRAS, reflect promising results. Namely, direct targeting of mutant KRAS variants using various CRISPR systems resulted in significant decrease in cell viability and proliferation in vitro, as well as tumor growth inhibition in vivo. In addition, the effect of mutant KRAS knockdown, via CRISPR, has been observed to exert regulatory effects on the downstream molecules including PI3K, ERK, Akt, Stat3, and c-myc. Molecules in the KRAS pathway have been subjected to CRISPR applications more often than KRAS itself. The aim of using CRISPR systems in these studies was mainly to analyze the therapeutic potential of possible downstream and upstream effectors of KRAS, as well as to discover further potential molecules. Although there have been molecules identified to have such potential in treatment of KRAS-driven cancers, a substantial amount of effort is still needed to establish treatment strategies based on these discoveries. We conclude that, at this point in time, despite being such a powerful directed genome editing tool, CRISPR remains to be underutilized for targeting KRAS mutations in cancer. Efforts channelled in this direction, might pave the way in solving the long-standing challenge of targeting the KRAS mutations in cancers. KW - Animals KW - Clustered Regularly Interspaced Short Palindromic Repeats KW - Humans KW - Mice KW - Mutation KW - Proto-Oncogene Proteins p21(ras)/therapeutic use Y1 - 2021 U6 - https://doi.org/10.1186/s12929-021-00772-0 VL - 28 SP - 1 EP - 25 PB - Springer Nature ER - TY - CHAP A1 - Hausler, Peter A1 - Roth, Carina A1 - Vitzthumecker, Thomas A1 - Bierl, Rudolf ED - Ribeiro, Paulo ED - Raposo, Maria T1 - Miniaturized Surface Plasmon Resonance Based Sensor Systems BT - Opportunities and Challenges T2 - Optics, Photonics and Laser Technology 2018 N2 - Surface Plasmon Resonance (SPR) is a well-known and established technology in bioanalysis and pharmaceutical sciences. Due to the expensive instrumentation and the need of trained people, it is mainly limited to applications in laboratories. However, there are some areas like environmental monitoring, chemical processing and civil infrastructure, which urgently need new sensor technologies. SPR has the potential to serve these fields. In order to be qualified for a use in these areas SPR has to overcome some hurdles. The instrumentation has to be robust, small in size and cheap. A device, which fits these needs, will be a micro-opto-electro-mechanical system (MOEMS) with integrated intelligent algorithms. In this book chapter, examples of miniaturized SPR devices are introduced, the limitations which have to be overcome as well as the possibilities for future applications are proposed. Due to the manifold advantages of this technology and the dropping prices for imaging sensors, Surface Plasmon Resonance imaging (SPRi) might become one of the leading technologies for SPR smart sensor systems. Y1 - 2019 SN - 978-3-030-30112-5 U6 - https://doi.org/10.1007/978-3-030-30113-2_8 SP - 169 EP - 195 PB - Springer Nature CY - Cham ER - TY - CHAP A1 - Singla, Rashmi A1 - de Ponte, Ulrike ED - Mayer, Claude-Hélène ED - Vanderheiden, Elisabeth T1 - Love in the Context of Transnational Academic Exchanges: Promoting Mental Health and Wellbeing T2 - International Handbook of Love N2 - Educational and cultural dimensions of transnational academic exchange such as student exchanges, double degree programmes, internships have been researched but the romantic dimensions are almost overlooked, especially qualitatively, while Green (EU’s Erasmus study abroad programme is ‘responsible for 1m babies’, 2014) documents that one quarter students on Erasmus exchange scheme met their long-term partner while studying abroad. The chapter explores love, with focus on formation of intimate relations in academic exchanges in the European settings. The method is case-studies drawn from two projects based in Denmark, the first about ethnically intermarried couples (Singla, Intermarriage and mixed parenting: Promoting mental health & wellbeing, crossover love. Palgrave Macmillan, 2015) and the second, an ongoing project about LAT (Living Apart Together) transnational couples (Singla & Varma, LAT (Living Apart Together) transnational couples: Promoting mental health and wellbeing, 2018), moving beyond ‘methodological nationalism and- conjugalism’. The theoretical framework is Cultural Psychology and foreground is a combination of Narrative Psychology, intersectionality, digital emotional reflexivity and transnationalism. Moreover, aspects related to figuring out criteria of the exchange situation abroad, which can underpin explaining the high rate of long-term relationships while studying abroad, are included. Those aspects are based on a framework, in which intercultural and developmental psychological findings are linked. The 3–4 case studies are drawn from empirical research with eight couples in the first study and 20 couples in the second. The narratives are thematically analysed, whereas two themes regarding participants’ motivation for establishing relationship despite differences and long-term sustaining of the relationship are described in the chapter. Preliminary findings nuance the phenomenon of love in academic exchanges, invoking concepts such as educational homogamy, balancing independence and togetherness, diversities of connectivities intersecting social media and intimacies. Furthermore, the significant others’ support and opposition of these couples’ love dynamics are covered, along with considerations linked to the concept of the emotional availability (Saunders, Kraus, Barone & Biringen, Frontiers in Psychology, 2015) based on Bowlby’s attachment theory and the shared third (Benjamin, Psychoanalytic Quarterly, 73(1), 5–46, 2004). Lastly, ‘good practices’ for promoting the mental health and wellbeing of such academic exchange couples are delineated along with suggestions for relevant services for those experiencing psychosocial problems. Educational and cultural dimensions of transnational academic exchange such as student exchanges, double degree programmes, internships have been researched but the romantic dimensions are almost overlooked, especially qualitatively, while Green (EU’s Erasmus study abroad programme is ‘responsible for 1m babies’, 2014) documents that one quarter students on Erasmus exchange scheme met their long-term partner while studying abroad. The chapter explores love, with focus on formation of intimate relations in academic exchanges in the European settings. The method is case-studies drawn from two projects based in Denmark, the first about ethnically intermarried couples (Singla, Intermarriage and mixed parenting: Promoting mental health & wellbeing, crossover love. Palgrave Macmillan, 2015) and the second, an ongoing project about LAT (Living Apart Together) transnational couples (Singla & Varma, LAT (Living Apart Together) transnational couples: Promoting mental health and wellbeing, 2018), moving beyond ‘methodological nationalism and- conjugalism’. The theoretical framework is Cultural Psychology and foreground is a combination of Narrative Psychology, intersectionality, digital emotional reflexivity and transnationalism. Moreover, aspects related to figuring out criteria of the exchange situation abroad, which can underpin explaining the high rate of long-term relationships while studying abroad, are included. Those aspects are based on a framework, in which intercultural and developmental psychological findings are linked. KW - Academic exchange KW - Diversities of connectivities KW - Educational homogamy KW - Emotional availability KW - Intimate relationship KW - Love KW - Narrative psychology Y1 - 2021 SN - 978-3-030-45995-6 U6 - https://doi.org/10.1007/978-3-030-45996-3_32 VL - 67 SP - 599 EP - 620 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Bedi-Visschers, Marion T1 - Von der hilfreichen Kätzin zum Gestiefelten Kater JF - Tierstudien 15/2019 : Tiere erzählen Y1 - 2019 UR - https://download.e-bookshelf.de/download/0012/6113/68/L-O-0012611368-0041192977.pdf VL - 8 IS - 15 SP - 33 EP - 44 PB - Neofelis Verlag ER - TY - JOUR A1 - Rothleitner, Christian A1 - Schlamminger, Stephan T1 - Invited Review Article: Measurements of the Newtonian constant of gravitation, G JF - Review of Scientific Instruments N2 - By many accounts, the Newtonian constant of gravitation G is the fundamental constant that is most difficult to measure accurately. Over the past three decades, more than a dozen precision measurements of this constant have been performed. However, the scatter of the data points is much larger than the uncertainties assigned to each individual measurement, yielding a Birge ratio of about five. Today, G is known with a relative standard uncertainty of 4.7 x 10(-5), which is several orders of magnitudes greater than the relative uncertainties of other fundamental constants. In this article, various methods to measure G are discussed. Alarge array of different instruments ranging from the simple torsion balance to the sophisticated atom interferometer can be used to determine G. Some instruments, such as the torsion balance can be used in several different ways. In this article, the advantages and disadvantages of different instruments as well as different methods are discussed. A narrative arc from the historical beginnings of the different methods to their modern implementation is given. Finally, the article ends with a brief overview of the current state of the art and an outlook. KW - acceleration KW - ADJUSTMENT KW - ATOM KW - BALANCE KW - CODATA RECOMMENDED VALUES KW - FORCE KW - FUNDAMENTAL PHYSICAL CONSTANTS KW - INTERFEROMETRY KW - MASS KW - PRECISION-MEASUREMENT Y1 - 2017 U6 - https://doi.org/10.1063/1.4994619 VL - 88 IS - 11 PB - AIP Publishing ER - TY - JOUR A1 - Dams, Florian A1 - Schreiner, Rupert T1 - Influencing factors on the sensitivity of MEMS-based thermal conductivity vacuum gauges JF - Journal of vacuum science & technology A N2 - The measurement range of thermal conductivity vacuum gauges is mainly influenced by the sensitivity of the sensing element to variations in pressure. An enhanced definition of sensitivity shows its theoretical dependence on the geometric measures of the sensor element at the whole pressure range. This value gives the possibility of direct comparison between different types of sensor structures without the influence of the operating conditions. To study the influencing factors, sensor chips with heated surfaces in the order of some tens of mm 2 were realized by microelectromechanical systems-based fabrication techniques. By a silicon-glass hybrid process two cold planes were formed in a distance of 150 mu m above and below the heated element. The thermal conductance of devices with different geometric measures was determined in constant temperature operating mode by usage of embedded measurement equipment. In this configuration the sensor signals were sensitive to pressure in a region from 10(-5) mbar. The sensitivity was extracted by a fit of the theoretical model to the measurement data and showed the predicted dependencies on the geometric measures. (C) 2014 American Vacuum Society. KW - Pirani Gauge KW - Pressure Sensor Y1 - 2014 U6 - https://doi.org/10.1116/1.4867486 VL - 32 IS - 3 PB - AVS ER - TY - JOUR A1 - Betz, Michael A. A1 - Büchele, Patric A1 - Brünnler, Manfred A1 - Deml, Sonja A1 - Lechner, Alfred T1 - Silicon micro venturi nozzles for cost-efficient spray coating of thin organic P3HT/PCBM layers JF - Journal of micromechanics and microengineering N2 - Improvements on spray coating are of particular interest to different fields of technology as it is a scalable deposition method and processing from solutions offer various application possibilities outside of typical facilities. When it comes to the deposition of expensive and film-forming media such as organic semiconductors, consumption and nozzle cleaning issues are of particular importance. We demonstrate the simple steps to design and fabricate micro venturi nozzles for economical spray coating with a consumption as low as 30-50 mu l.min(-1). For spray coating an active area of 25 cm(2) a 2.45-4.01 fold coating efficiency is observed compared to a conventional airbrush nozzle set. The electrical characterization of first diodes sprayed with an active layer thickness of similar to 750 nm using a single micronozzle at a coating speed of 1.7 cm(2).min(-1) reveals a good external quantum efficiency of 72.9% at 532 nm and a dark current of similar to 7.4.10(-5) mA.cm(-2), both measured at -2 V. Furthermore, the high resistance of the micronozzles against solvents and most acids is provided through realization in a silicon wafer with silicon dioxide encapsulation, therefore allowing easy and effective cleaning. KW - deep reactive ion etching KW - microfluidics KW - organic photodiodes KW - organic semiconductors KW - spray coating KW - venturi nozzles Y1 - 2017 U6 - https://doi.org/10.1088/0960-1317/27/1/015019 VL - 27 IS - 1 PB - IOP Publishing ER - TY - JOUR A1 - Liebherr, Raphaela B. A1 - Hutterer, Albert A1 - Mickert, Matthias J. A1 - Vogl, Franziska C. A1 - Beutner, Andrea A1 - Lechner, Alfred A1 - Hummel, Helmut A1 - Gorris, Hans H. T1 - Three-in-one enzyme assay based on single molecule detection in femtoliter arrays JF - Analytical and bioanalytical chemistry N2 - Large arrays of femtoliter-sized chambers are important tools for single molecule research as well as bioanalytical applications. We have optimized the design and fabrication of two array types consisting of 250 × 250 (62 500) femtoliter chambers either by surface etching of fused silica slides or by polydimethylsiloxane (PDMS) molding. Highly diluted solutions of β-galactosidase were enclosed in such arrays to monitor the fluorogenic reactions of hundreds of individual enzyme molecules in parallel by wide-field fluorescence microscopy. An efficient mechanical sealing procedure was developed to prevent diffusion of the fluorescent reaction product out of the chambers. Different approaches for minimizing non-specific surface adsorption were explored. The signal acquisition was optimized to grant both a large field of view and an efficient signal acquisition from each femtoliter chamber. The optimized femtoliter array has enabled a three-in-one enzyme assay system: First, the concentration of active enzyme can be determined in a digital way by counting fluorescent chambers in the array. Second, the activity of the enzyme bulk solution is given by averaging many individual substrate turnover rates without the need for knowing the exact enzyme concentration. Third-unlike conventional enzyme assays-the distribution of individual substrate turnover rates yields insight into the conformational heterogeneity in an enzyme population. The substrate turnover rates of single β-galactosidase molecules were found to be broadly distributed and independent of the type of femtoliter array. In general, both types of femtoliter arrays are highly sensitive platforms for enzyme analysis at the single molecule level and yield consistent results. KW - ARRAYS KW - Digital concentration readout KW - Enzyme kinetics KW - Fluorescence microscopy KW - Single molecule detection Y1 - 2015 U6 - https://doi.org/10.1007/s00216-015-8910-0 VL - 407 IS - 24 SP - 7443 EP - 7452 PB - Springer ER - TY - JOUR A1 - Ruhl, Guenther A1 - Wittmann, Sebastian A1 - Koenig, Matthias A1 - Neumaier, Daniel T1 - The integration of graphene into microelectronic devices JF - Beilstein Journal of Nanotechnology N2 - Since 2004 the field of graphene research has attracted increasing interest worldwide. Especially the integration of graphene into microelectronic devices has the potential for numerous applications. Therefore, we summarize the current knowledge on this aspect. Surveys show that considerable progress was made in the field of graphene synthesis. However, the central issue consists of the availability of techniques suitable for production for the deposition of graphene on dielectric substrates. Besides, the encapsulation of graphene for further processing while maintaining its properties poses a challenge. Regarding the graphene/metal contact intensive research was done and recently substantial advancements were made towards contact resistances applicable for electronic devices. Generally speaking the crucial issues for graphene integration are identified today and the corresponding research tasks can be clearly defined. KW - BORON-NITRIDE KW - CHEMICAL-VAPOR-DEPOSITION KW - CONTACT-RESISTANCE KW - contacts KW - COPPER FOILS KW - deposition KW - ELECTRODES KW - encapsulation KW - FILMS KW - graphene KW - GROWTH KW - LOW-TEMPERATURE KW - process integration KW - RAMAN-SPECTROSCOPY KW - SUBSTRATE Y1 - 2017 U6 - https://doi.org/10.3762/bjnano.8.107 VL - 8 SP - 1056 EP - 1064 PB - Beilstein-Institut ER - TY - CHAP A1 - Zeitler, Berndt A1 - Hoeller, Christoph A1 - Reinhold, Steffi T1 - Maximum Fast time-weighted levels - When can a transient be seen as a Dirac impulse? T2 - Internoise 2023, 20–23 August 2023, Chiba, Greater Tokyo N2 - It is common practice to use maximum FAST time-weighted sound pressure levels to assess transient impact noise, as these levels correlate well with human perception of impact noise. Maximum FAST time-weighted levels are known to be dependent on the reverberation time of the receiving room. In previous studies, an analytical correction term was developed using a Dirac impulse. The correction term is used to calculate the maximum FAST time-weighted levels from peak sound pressure levels. Peak levels are independent of the reverberation time of the room. Applying the correction term makes it possible to compare measurement results from different rooms. The correction term has been validated in several studies for the standard rubber impact ball. In this paper, the influence of the source signal (Dirac impulse) on the correction term is studied. Analytical and numerical models are employed to investigate the consequences of stretching the impulse in time and of changing its shape. The results are compared with empirical solutions developed in other studies. Y1 - 2023 UR - https://www.researchgate.net/publication/373546707_Maximum_Fast_time-weighted_levels_-_When_can_a_transient_be_seen_as_a_Dirac_impulse ER - TY - CHAP A1 - Blödt, Adrian A1 - Höller, Christoph T1 - Akustische Verbesserungsmaßnahmen an Stoßstellen im Holzbau T2 - Fortschritte der Akustik DAGA 2022: 48. Jahrestagung für Akustik, 21. - 24. März 2022, Stuttgart und Online Y1 - 2022 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - RPRT A1 - Höller, Christoph A1 - Zeitler, Berndt A1 - Sabourin, Ivan T1 - Airborne and impact sound insulation data for cold-formed steel-framed walls and floors N2 - This report presents the results of an extensive series of direct sound insulation tests of cold-formed steel-framed walls and floors. The direct airborne sound insulation of 30 walls with cold-formed steel framing was measured in accordance with ASTM E90-09. The walls had steel studs with a depth of 92 mm (3-5/8”) or 152 mm (6”), and with a steel thickness of 1.09 mm (0.043”) or 1.37 mm (0.054”). Other parameters that were investigated included the number of layers and thickness of gypsum board, the cavity insulation, the stud spacing, and the use of resilient channels. The test results for some non-standard wall configurations that were tested for research purposes (e.g. for walls with gypsum board on one side only) are also included in this report. The direct airborne and impact sound insulation of 17 floors with cold-formed steel framing was measured in accordance with ASTM E90-09 and ASTM E492-09, respectively. The floors had steel joists with a depth of 254 mm (10”) or 317 mm (12.5”), and with a steel thickness of 1.37 mm (0.054”). The top surface of the floor/ceiling assemblies was composed of a corrugated steel deck with poured gypsum concrete, while the bottom surface was composed of a gypsum board ceiling on resilient channels. The influence of the joist depth and the number of layers and thickness of the ceiling gypsum board was investigated, as well as the influence of several floor coverings (e.g. laminate or carpet). The report presents the detailed specimen descriptions and specimen properties and the results from the standardized tests according to ASTM E90-09 and ASTM E492-09. Brief analyses of the parameters affecting the sound insulation of the steel-framed assemblies are provided. The tests presented in this report were part of a large research study that also included an investigation into the flanking sound transmission in cold-formed steel-framed buildings. The results of that study are described in the NRC Research Report RR-337, “Apparent Sound Insulation in Cold-Formed Steel-Framed Buildings” [1]. The NRC Research Report RR-337 also includes some of the airborne sound insulation results presented here, albeit without listing the detailed specimen descriptions and specimen properties that are provided in this report. Y1 - 2018 U6 - https://doi.org/10.4224/23002823 PB - National Research Council of Canada. Construction ER -