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639 results on '"Wunderlich R."'

1. Fabrication and electrical transport properties of embedded graphite microwires in a diamond matrix

Author

Barzola-Quiquia, J., Lühmann, T., Wunderlich, R., Stiller, M., Zoraghi, M., Meijer, J., Esquinazi, P., Böttner, J., and Estrela-Lopis, I.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Micrometer width and nanometer thick wires with different shapes were produced $\approx 3~\upmu$m below the surface of a diamond crystal using a microbeam of He$^+$ ions with 1.8~MeV energy. Initial samples are amorphous and after annealing at $T\approx 1475$~K, the wires crystallized into a graphite-like structures, according to confocal Raman spectroscopy measurements. The electrical resistivity at room temperature is only one order of magnitude larger than the in-plane resistivity of highly oriented pyrolytic bulk graphite and shows a small resistivity ratio($\rho(2{\rm K})/\rho(315{\rm K}) \approx 1.275$). A small negative magnetoresistance below $T=200$~K was measured and can be well understood taking spin-dependent scattering processes into account. The used method provides the means to design and produce millimeter to micrometer sized conducting circuits with arbitrary shape embedded in a diamond matrix., Comment: 12 pages, 5 figures, to be published in Journal of Physics D: Applied Physics (Feb. 2017)

Published
2017
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19. Structure and Properties of Some CoCrFeNi-Based High Entropy Alloys

Author

Cornide, J., primary, Dahlborg, U., additional, Leong, Z., additional, Dominguez, L. Asensio, additional, Juraszek, J., additional, Jouen, S., additional, Hansen, T., additional, Wunderlich, R., additional, Chambreland, S., additional, Todd, I., additional, Goodall, R., additional, and Calvo-Dahlborg, M., additional

Published
2015
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21. Reduced-Gravity Measurements of the Effect of Oxygen on Properties of Zirconium

Author

Zhao, J, Lee, J, Wunderlich, R, Fecht, H.-J, Schneider, S, SanSoucie, M, Rogers, J, and Hyers, R

Subjects
Metals And Metallic Materials
Abstract

The influence of oxygen on the thermophysical properties of zirconium is being investigated using MSL-EML (Material Science Laboratory - Electromagnetic Levitator) on ISS (International Space Station) in collaboration with NASA, ESA (European Space Agency), and DLR (German Aerospace Center). Zirconium samples with different oxygen concentrations will be put into multiple melt cycles, during which the density, viscosity, surface tension, heat capacity, and electric conductivity will be measured at various undercooled temperatures. The facility check-up of MSL-EML and the first set of melting experiments have been successfully performed in 2015. The first zirconium sample will be tested near the end of 2015. As part of ground support activities, the thermophysical properties of zirconium and ZrO were measured using a ground-based electrostatic levitator located at the NASA Marshall Space Flight Center. The influence of oxygen on the measured surface tension was evaluated. The results of this research will serve as reference data for those measured in ISS.

Published
2016

23. Implementation of disaster medicine education in German medical schools - a nationwide survey

Author

Kasselmann, N, Willy, C, Domres, BD, Wunderlich, R, Back, DA, Kasselmann, N, Willy, C, Domres, BD, Wunderlich, R, and Back, DA

Abstract

Objectives: Floods, earthquakes and terror attacks in recent years emphasize the importance of disaster preparedness for the medical community. To best prepare doctors for providing optimal care in disaster situations, specific education and training should start at the medical school level. This study containes an online survey among German medical schools to evaluate the status quo of teaching disaster medicine and to reveal potential obstacles.Methods: The dean's offices of 36 German medical schools were contacted from April 2016 to May 2017. Via an e-mail link, recipients could anonymously and voluntarily access an online questionnaire (74 items, 42 with a four-point "Likert-like" scale, 12 yes/no questions and 20 with listed items to choose from). The answers were analyzed by descriptive statistics. Results: A total of 25 medical schools participated in the survey. Twenty respondents were in favor of expanding disaster medicine teaching at their institutions. Incorporating single topics ranging from triage (n=21) to accidents involving radioactive materials (n=4) into the curriculum varied widely. Only two schools had established a teaching coordinator for disaster medicine and only one e-learning course had been established. Twenty-one respondents regarded funding issues and 18 regarded organizational matters to be major hurdles in the future. Conclusion: Though most faculty representatives indicated that they favor expanding and implementing disaster medicine education, German medical schools still have a lot of room for enhancement in this field. The incorporation of e-learning tools could facilitate the expansion of disaster medicine teaching while simultaneously addressing the expressed concerns of the survey's participants and guarantee nationwide standardization., Ziel: Die Vorbereitung von medizinischem Personal auf Katastrophensituationen hat mit der steigenden Zahl von Naturkatastrophen und Terrorattacken an Bedeutung gewonnen. Um in der Ausbildung von Ärzt:innen einheitliche Grundlagen zu schaffen, muss bereits im Medizinstudium mit einer katastrophenmedizinischen Ausbildung begonnen werden. Im Rahmen einer Online-Umfrage an den Medizinischen Fakultäten in Deutschland wurde der Status quo dieser Ausbildung evaluiert, auch um etwaige Hindernisse aufzuzeigen. Methodik: Die Prodekanate von 36 deutschen Medizinischen Fakultäten wurden von April 2016 bis Mai 2017 über einen Link via E-Mail zur Teilnahme eingeladen. Der Online-Fragebogen (74 Fragen, 42 mit Vier-Punkt Likert-ähnlicher Skala, 12 Ja/Nein Fragen und 20 Fragen mit Auswahlmöglichkeiten) konnte freiwillig und anonym beantwortet werden. Die Anworten wurden mittels deskriptiver Statistik ausgewertet. Ergebnisse: 25 Fakultäten beantworteten die Umfrage. 20 Teilnehmer:innen befürworteten einen Ausbau der Lehre der Katastrophenmedizin. Die Einbindung von einzelnen Unterthemen variierte stark (Triage n= 21, Unfälle mit radioaktiven Materialien n = 4). Nur zwei Fakultäten hatten eine*n Lehrkoordinator*in für Katastrophenmedizin etabliert, nur eine bietet einen Onlinekurs an. Die Teilnehmer*innen erwarteten vor allem finanzielle (n=21) und organisatorische Hürden (n=18).Zusammenfassung: Die meisten Fakultäten zeigten sich gegenüber einem Ausbau der katastrophenmedizinischen Lehre offen. Trotzdem gibt es viel Raum, die Lehre zu verbessern und das Angebot zu erweitern. Um eine nationale Standardisierung zu ermöglichen und die erwarteten Hürden zu adressieren, sollte vermehrt auf e-Learning Angebote zurückgegriffen werden.

Published
2021

31. Soil survey and vegetation : northeastern Kodiak Island area, Alaska /

Author

Rieger, Samuel, 1921, Wunderlich, R. Eugene, Alaska Agricultural Experiment Station, United States. Soil Conservation Service, United States. Bureau of Land Management, Bureau of Land Management (archive.org), Rieger, Samuel, 1921, Wunderlich, R. Eugene, Alaska Agricultural Experiment Station, United States. Soil Conservation Service, and United States. Bureau of Land Management

Subjects
Alaska, Kodiac Island, Kodiak Island, Maps, Plants, Soil surveys, Soils
Published
1960

38. Optical investigation of low-temperature electric-field-induced relaxations in amorphous solids

Author

Kharlamov, B.M., Wunderlich, R., Maier, H., and Haarer, D.

Subjects
Polymers -- Research, Electric fields -- Research, Amorphous semiconductors -- Research, Chemicals, plastics and rubber industries
Abstract

A study was conducted to analyze the electrical characteristics of a two-level system in two-polymer glasses. Two types of polymers were examined, namely polymethylmethacrylate and polystyrene. The time evolution of a spectral hole was also analized in an electric field cycling experiment. Results indicated that the time evolution of the field-induced spectral diffusion correlated qualitatively with model predictions.

Published
1998

40. SNS-DC-SQUIDs and flux transformers for integrated magnetometers in flip-chip technique

Author

Meyer, B., Hollkott, J., Francke, C., Wunderlich, R., and Muller, J.

Subjects
Superconducting quantum interference devices -- Research, Josephson junction -- Research, Plasma etching -- Methods, Business, Electronics, Electronics and electrical industries
Abstract

SNS-direct current-superconducting quantum interference devices (DC-SQUIDs) with a step-and-gap geometry are fabricated by preparing YBCO/Ag/YBCO-Josephson junctions across steps in MgO substrates. An additional etching process is employed to remove the unwanted shunt resistance on top of the YBCO films. Transverse electromagnetic examinations show that this approach improves the DC-SQUIDs' normal resistance without any reduction of the critical current.

Published
1995

46. Cancer Cell Death-Inducing Radiotherapy: Impact on Local Tumour Control, Tumour Cell Proliferation and Induction of Systemic Anti-tumour Immunity

Author

Frey, B., Derer, A., Scheithauer, H.R., Wunderlich, R., Fietkau, R., and Gaipl, U.S.

Subjects
Cell Death, DNA Repair, Apoptosis, Autophagy, Dna Damage, Danger Signals, Immunogenic Cell Death, Immunotherapy, Necrosis, Radiotherapy, Senescence-associated Secretory Phenotype, DNA, Neoplasm, Radiation Tolerance, Neoplasm Proteins, Immune System, Neoplasms, Neoplastic Stem Cells, Alarmins, Animals, Humans, HMGB1 Protein, Cell Division, Cellular Senescence, DNA Damage
Abstract

Radiotherapy (RT) predominantly is aimed to induce DNA damage in tumour cells that results in reduction of their clonogenicity and finally in tumour cell death. Adaptation of RT with higher single doses has become necessary and led to a more detailed view on what kind of tumour cell death is induced and which immunological consequences result from it. RT is capable of rendering tumour cells immunogenic by modifying the tumour cell phenotype and the microenvironment. Danger signals are released as well as the senescence-associated secretory phenotype. This results in maturation of dendritic cells and priming of cytotoxic T cells as well as in activation of natural killer cells. However, RT on the other hand can also result in immune suppressive events including apoptosis induction and foster tumour cell proliferation. That's why RT is nowadays increasingly combined with selected immunotherapies.

Published
2016

47. PROCEEDINGS OF VOLGA NEUROSCIENCE MEETING 2016 AND VOLGA NEUROSCIENCE SCHOOL 2016 VOLGA NEUROSCIENCE SCHOOL 2016 ASTROGLIAL CONTROL OF RHYTHM GENESIS IN THE BRAIN

Author

Titova, N.A., Zhuravleva, Z.D., Druzin, M., Mukhina, I.V., Ponomareva, N.V., Tutukova, S.A., Mitroshina, E.V., Lebedeva, A.V., Epifanova, E.A., Mishchenko, T.A., Vedunova, M.V., Babaev, A.A., Abogessimengane, B., Urazov, M.D., Khamray, I., Astrakhanova, T.A., Shchelchkova, N.A., Lapshin, R.D., Belousova, I.I., Yan, K., Grishina, O., Camarero, G., Bessa, E., Gunther, U., Wunderlich, R., Bormuth, I., Tarabykin, V., Bolshakova, A.V., Zhemkov, V.A., Gainullina, A.N., Kukanova, E.O., Korban, S.A., Bezprozvanny, I.B., Newman, A., Tyurikova, O., Plata, A., Tovpyga, V., Denisov, P., Makovkin, S., Ivlev, E., Semyanov, A., Borisova, E.V., Turovskaya, M.V., Turovsky, E.A., Kastalskiy, I.A., Makarov, V.A., Lobov, S.A., Shumilova, A.V., Deryugina, A.V., Boyarinov, G.A., Samborska, V., Roiser, J., Erofeev, A.I., Zakharova, O.A., Matveev, M.V., Terekhin, S.G., Vlasova, O.L., Olszowiec, C., Kolpakov, V.N., Gladkov, A.A., Pigareva, Y.I., Pimashkin, A.S., Kazantsev, V.B., Malishev, E.I., Bukatin, A.Y., Popov, A.V., Doronin, M.S., Dembitskaya, Y.V., Esir, P.M., Simonov, A.Y., Gordleeva, S.Y., Kelley, A., Shilnikov, A., Falk, I., Timofeeva, Y., Salina, V.A., Rosario, M., Gong, C., Pikovsky, A., Ganin, I.P., Kosichenko, E.A., Kaplan, A.Y., Levanova, T.A., Kazakov, A.O., Osipov, G.V., Syrov, N.V., Kirjanov, D.A., Zhigulskaya, D.D., Borisov, S.V., Yakovlev, L.V., Vasilyev, A.N., Liburkina, S.P., Stasenko, S.V., Lazarevich, I.A., Dityatev, A.E., Mishchenko, M.A., Gorban, A.N., Tyukina, T.A., Vasileva, E.N., Semyanov, A.V., Shishkova, E., Lebedeva, A., Shishkina, T.V., Mitaeva, Y.I., and Mozherov, A.M.

Subjects
VOLGA NEUROSCIENCE SCHOOL 2016, NEUROSCIENCE, RHYTHM GENESIS IN THE BRAIN, ASTROGLIAL CONTROL, VOLGA NEUROSCIENCE MEETING 2016
Published
2016
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