cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Investigation of Thermal Performance of High-Concentration Photovoltaic Solar Cell System
Creators: name: Chou, T.L.
name: Shih, Z.H.
name: Hong, H.F.
name: Han, C.N.
name: Chiang, K.N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 837-842
description: A high-concentration photovoltaic (HCPV) system has been developed to reduce the electrical energy cost generated by a conventional photovoltaic system. Nevertheless, the device temperature rises quickly since solar cells
operate under concentrated-light operation conditions. In other words, system output power or energy-conversion efficiency decreases with the increasing temperature of the cell incorporated within the system. Consequently, thermal management becomes an important HCPV solar cell package issue. In this research, a detailed finite element model of the HCPV solar cell package is established initially as a benchmark by using the ANSYS® finite element analysis program. Moreover, the solar cell’s dissipation power, which is obtained by a predicted function, is applied. Moreover, outdoor experiments are also performed to validate the benchmark finite element model with the predicted dissipation power. After the simulation is validated, thermal performance variations under different HCPV solar cell package design parameters are analyzed. Based on the simulation results of different design parameters, it was observed that the heat sink plate’s geometry plays an important role in the thermal management of the HCPV solar cell package. It also indicates that the larger the convection surface of the heat sink is, the lower the thermal resistance of the HCPV solar cell package will be.
Furthermore, the thermal conductivities of other components have a light effect that affects junction temperature when these components are good enough to conduct heat dissipation from the solder cell chip.
Reaction mechanism of the farnesyl pyrophosphate C-methyltransferase towards the biosynthesis of pre-sodorifen pyrophosphate by Serratia plymuthica 4Rx13
Creators: name: Lemfack, Marie Chantal
name: Brandt, Wolfgang
name: Krüger, Katja
name: Gurowietz, Alexandra
name: Djifack, Jacky
name: Jung, Jan-Philip
name: Hopf, Marius
name: Noack, Heiko
name: Junker, Björn
name: Reuß, Stephan
name: Piechulla, Birgit
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 615

description: Classical terpenoid biosynthesis involves the cyclization of the linear prenyl pyrophosphate precursors geranyl-, farnesyl-, or geranylgeranyl pyrophosphate (GPP, FPP, GGPP) and their isomers, to produce a huge number of natural compounds. Recently, it was shown for the first time that the biosynthesis of the unique homo-sesquiterpene sodorifen by Serratia plymuthica 4Rx13 involves a methylated and cyclized intermediate as the substrate of the sodorifen synthase. To further support the proposed biosynthetic pathway, we now identified the cyclic prenyl pyrophosphate intermediate pre-sodorifen pyrophosphate (PSPP). Its absolute configuration (6R,7S,9S) was determined by comparison of calculated and experimental CD-spectra of its hydrolysis product and matches with those predicted by semi-empirical quantum calculations of the reaction mechanism. In silico modeling of the reaction mechanism of the FPP C-methyltransferase (FPPMT) revealed a SN2 mechanism for the methyl transfer followed by a cyclization cascade. The cyclization of FPP to PSPP is guided by a catalytic dyad of H191 and Y39 and involves an unprecedented cyclopropyl intermediate. W46, W306, F56, and L239 form the hydrophobic binding pocket and E42 and H45 complex a magnesium cation that interacts with the diphosphate moiety of FPP. Six additional amino acids turned out to be essential for product formation and the importance of these amino acids was subsequently confirmed by site-directed mutagenesis. Our results reveal the reaction mechanism involved in methyltransferase-catalyzed cyclization and demonstrate that this coupling of C-methylation and cyclization of FPP by the FPPMT represents an alternative route of terpene biosynthesis that could increase the terpenoid diversity and structural space.
title: Review: "Das polnische Fenster. Deutsch-polnische Kontakte im staatssozialistischen Alltag Leipzigs 1972–1989" / Daniel Logemann. München: Oldenbourg Wissenschaftsverlag, 2012. ISBN 3486713035
Creators: name: Keck-Szajbel, Mark
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2020

description: Daniel Logemann is an architect. In his dissertation, his house, he has taken blueprints and built spaces for the family. There are two neighbors living in this communal apartment: East Germans and Poles. Their personal apartments are by-and-large equitable: the East Germans got the apartment with a garage to park their car and bicycle, while the Poles got the one with a balcony to see the city. In other words, East Germans got the economy, Poles got political liberalism.
PV and GIS Lab for Teaching Solar Energy
Creators: name: Poulek, V.
name: Schakhramanyan, M.A.
name: Simakin, V.
name: Strebkov, D.
name: Tyukhov, I.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3815-3818
description: Developing new technologies aimed at solving the world's energy and climate change challenges, environmental problem demand young people with a good background in solar energy. Students should learn more about clean renewable energy. With the lesson plans that are now being developed for solar (renewable) energy in Russian universities, there is a pressing need for corresponding hands on experience either of lab equipment (indoors) and or photovoltaic systems installed in test fields (outdoors) to augment enhance the educational experience. This paper describes photovoltaic (PV) lab equipment and geographical information systems (GIS) developed at the UNESCO Chair on Renewable Energy in the All Russian Research Institute for Electrification of
Agriculture (VIESH) and at some Russian institutions for education and training solar energy and PV systems for school and university students. Both properly designed PV lab experiments and satellite receivers are used to teach sciences.
Organic Photovoltaics: State of the Art and Markets
Creators: name: Woyte, A.
name: Noirot, S.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3771-3774
description: Different organic solar cell technologies are in the phase of prototyping. This concerns dye-sensitized cells (Graetzel cells) as well as polymer cells. For both technologies pilot production lines exist. Reported efficiencies in the lab are significant and regularly increasing. Stability is increasing as well, although, long-term outdoor stability in the field as required for power applications have not yet been achieved. Prices can be much lower than for inorganic PV technologies, especially when solar cells can be printed. The energy pay-back time is much lower than for inorganic photovoltaics. The paper presents results from the European Project OrgaPVnet.
Packaging of Front Contact c-Si Solar Cells for Concentration Terrestrial Application
Creators: name: Fucci, R.
name: Bobeico, E.
name: Cancro, C.
name: Lancellotti, L.
name: Leanza, G.
name: Morvillo, P.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 827-831
description: The concentration of sunlight on photovoltaic cells and, consequently, the substitution of expensive photovoltaic areas with less expensive optical concentrators can contribute to reduce the total system cost of photovoltaic plants; unfortunately, this approach involves some new problems regarding the handling of heat, the reduced dimensions of electrical contacts and the use of optical concentrators. The aim of this work is the development of ENEA cell and module assembly, designed and developed in ENEA’s laboratory in Portici (Italy). Starting from characteristic data obtained by experimental apparatus or by simulation programs, and using an empirical model based on this information, an optimum combination of the different structures involved in the
concentration process has been determined. This optimization procedure is based on the minimization of the energy cost determined for a particular geographical site (Real Reporting Conditions).
Dental trauma on whole body trauma CT : an underreported finding
Creators: name: Meyer, Hans-Jonas
name: Schramm, Dominik
name: Bach, Andreas Gunter
name: Eckert, Alexander W.
name: Surov, Alexey
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Background: The prevalence of dental injuries (DI) in polytrauma patients is unknown. The purpose of our study was to identify the frequency of dental injuries on whole body CTs acquired in a trauma setting and to estimate how often they are correctly reported by the radiologist. Methods: In the time period between 2006 and 2018 the radiological database of one university hospital was screened for whole-body trauma CTs. A total of 994 CTs were identified and re-evaluated. Results: Dental injuries were identified in 127 patients (12.8% of patients). There were 27 women (21.3%) and 100 men (78.7%) with a mean age of 51.0 ± 18.9 years (range 10–96 years). Regarding localization, most findings involved the molars (n = 107, 37.4%), followed by the incisors (n = 81, 28.3%), premolars (n = 59, 20.6%) and canines (n = 39, 13.7%). Most common findings were as follows: luxations (n = 49, 45.8%), followed by crown fractures (n = 46, 43%), root fractures (n = 10, 9.3%), extrusions (n = 1, 0.9%), and intrusions (n = 1, 0.9%). Only 15 findings (11.8% of all patients with dental injuries) were described in the original radiological reports. Conclusion: DI had a high occurrence in polytrauma patients. A high frequency of underreported dental trauma findings was identified. Radiologists reporting whole-body trauma CT should be aware of possible dental trauma to report the findings adequately.
Technical and Regulatory Development Needed to Foster Grid-Connected Photovoltaics Within the UK Electricity Sector
Creators: name: Candelise, C.
name: Leach, M.A.
name: Gross, R.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3801-3810
description: The aim of this paper is to provide insight into what would be necessary to increase the economic attractiveness of photovoltaics in the UK. In order to do this, the analysis focuses initially on the economics of investing in a PV system in the UK, under current cost, market and regulatory conditions. The financial viability of such investment is assessed by using discounted cash flow analysis to calculate the net present value (NPV) of PV system investment under a set of options currently available to microgenerators in the UK. The paper then looks at the role of policy incentives by analysing the different impacts on the financial viability of PV of the current RO regime and its proposed reform versus a potential new type of subsidy for the UK, namely a feed-in-tariff. Finally, it looks at what cost reduction would be needed to make PV systems a viable investment in the UK.
PV-Guardian®: Automatic Integrated Anti-Theft System to Check About Surveillance and Operative Condition for the Photovoltaic Modules
Creators: name: Graditi, G.
name: Merola, A.
name: Pascarella, F.
name: Romano, A.
name: Roca, F.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3823-3827
description: The increasing and capillary diffusion of Photovoltaic installations both of small-average power (1-100 kWp) that wider ones (>100kWp), often localized in rural areas, unfortunately is depicting a peculiar aspect that was
underestimated and that is quickly growing: PV module theft! The aim of this paper is to describe PV-Guardian®, an innovative anti-theft system for PV modules, developed by ENEA and put under Italian patent, which will be soon extended outside our country. PV-Guardian consists of a small and thin electronic card, self-powered by the PV module and internally laminated in such a way it cannot be removed without destroying the panel. Thanks to the
application of the GPS technology, PV-Guardian constantly checks the geographical coordinates of the site where the panel is located and it compares them with the data stored by the installing operator on the electronic card by wired/wireless operation and PIN-PUK specific security codes. The PV module energy output is promptly and automatically turned-off when a discrepancy is noted between the current sun exposure position of the PV module and its former coded position. This innovative antitheft system doesn't need of the local presence of personnel for surveillance, neither a complex infrastructure devoted to the monitoring. Several prototypes have been, already, developed by the inventors and many outdoor tests are in progress in order to validate the anti theft performance. Some results of this experimental campaign are reported in this work. Contacts are in progress with many national and international companies interested to PV Guardian application and its manufacturing and industrialization.
Nonpolar p-GaN/n-Si heterojunction diode characteristics: A comparison between ensemble and single nanowire devices
Creators: name: Patsha, Avinash
name: Pandian, Ramanathaswamy
name: Dhara, Sandip
name: Tyagi, A. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electrical and photodiode characteristics of ensemble and single p-GaN nanowire and n-Si heterojunction devices were studied. Ideality factor of the single nanowire p-GaN/n-Si device was found to be about three times lower compared to that of the ensemble nanowire device. Apart from the deep-level traps in p-GaN nanowires, defect states due to inhomogeneity in Mg dopants in the ensemble nanowire device are attributed to the origin of high ideality factor. Photovoltaic mode of ensemble nanowire device showed an improvement in the fill-factors up to 60 percent over the single nanowire device with fill-factors up to 30 percent. Reponsivity of the single nanowire device in photoconducting mode was found to be enhanced by five orders, at 470 nm. The enhanced photoresponse of the single nanowire device also confirms the photoconduction due to defect states in p-GaN nanowires.
description: 24 pages, 6 figures,Journal
All-in-all-out magnetic domain size in pyrochlore iridate thin films as probed by local magnetotransport
Creators: name: Fujita, T. C.
name: Uchida, M.
name: Kozuka, Y.
name: Ogawa, S.
name: Tsukazaki, A.
name: Arima, T.
name: Kawasaki, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Pyrochlore iridates have attracted growing attention because of a theoretical prediction of a possible topological semimetal phase originating from all-in-all-out spin ordering. Related to the topological band structure, recent findings of the magnetic domain wall conduction have stimulated investigations of magnetic domain distribution in this system. Here, we investigate the size of magnetic domains in Eu$_2$Ir$_2$O$_7$ single crystalline thin films by magnetoresistance (MR) using microscale Hall bars. Two distinct magnetic domains of the all-in-all-out spin structure are known to exhibit linear MR but with opposite signs, which enables us to estimate the ratio of the two domains in the patterned channel. The linear MR for 80 ${\times}$ 60 $μ$m$^2$ channel is nearly zero after zero-field cooling, suggesting random distribution of domains smaller than the channel size. In contrast, the wide distribution of the value of the linear MR is detected in 2 ${\times}$ 2 $μ$m$^2$ channel, reflecting the detectable domain size depending on each cooling-cycle. Compared to simulation results, we estimate the average size of a single all-in-all-out magnetic domain as 1-2 $μ$m.
description: 16 pages, 3 figures
Stromal NRG1 in luminal breast cancer defines pro-fibrotic and migratory cancer-associated fibroblasts
Creators: name: Berdiel-Acer, Mireia
name: Maia, Ana
name: Hristova, Zhivka Ivanova
name: Borgoni, Simone
name: Vetter, Martina
name: Burmester, Sara
name: Becki, Corinna
name: Michels, Birgitta
name: Abnaof, Khalid
name: Binenbaum, Ilona
name: Bethmann, Daniel
name: Chatziioannou, Aristotelis
name: Hasmann, Max
name: Thomssen, Christoph
name: Espinet, Elisa
name: Wiemann, Stefan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 610

description: HER3 is highly expressed in luminal breast cancer subtypes. Its activation by NRG1 promotes activation of AKT and ERK1/2, contributing to tumour progression and therapy resistance. HER3-targeting agents that block this activation, are currently under phase 1/2 clinical studies, and although they have shown favorable tolerability, their activity as a single agent has proven to be limited. Here we show that phosphorylation and activation of HER3 in luminal breast cancer cells occurs in a paracrine manner and is mediated by NRG1 expressed by cancer-associated fibroblasts (CAFs). Moreover, we uncover a HER3-independent NRG1 signaling in CAFs that results in the induction of a strong migratory and pro-fibrotic phenotype, describing a subtype of CAFs with elevated expression of NRG1 and an associated transcriptomic profile that determines their functional properties. Finally, we identified Hyaluronan Synthase 2 (HAS2), a targetable molecule strongly correlated with NRG1, as an attractive player supporting NRG1 signaling in CAFs.
Estimation of Energy Payback Time and CO2 Emission of Various Kinds of PV Systems
Creators: name: Komoto, K.
name: Uchida, H.
name: Ito, M.
name: Kurokawa, K.
name: Inaba, A.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3833-3835
description: PV technology is a promising option for reducing fossil fuels consumption and preventing global warming. To quantitatively evaluate an effect of deploying PV installation, we estimated energy payback time and CO2 emission of various kinds of PV systems from a life-cycle viewpoint. Energy payback time and CO2 emission rate of residential PV system excluding after operation were 1.4 – 3.0 years and 46 - 78 g-CO2/kWh. In case of PV systems for public and industrial building, energy payback time was 1.9 – 3.4 years, and CO2 emission rate was 62 - 87 g-CO2/kWh. Analyses on recycling PV modules showed that recovering Si materials would lead to reduce 30 – 35 % of energy requirement and CO2 emission caused by virgin Si materials, and that recovering glasses would lead significant impact, especially in case of thin-film PV modules. It was also found ground-mounted PV system would require much energy and CO2 emission comparing with residential and building PV systems under the same climate
conditions. However, ground mounted very large scale PV systems in the sunny region like desert would be almost same as or less than residential PV systems under ordinary condition.
Two Step Metallization Using Ni/Cu and Ni/Ag Front Contacts for Conversion of Commercial c-Si Solar Cell to Low Concentrator Solar Cell
Creators: name: Chaudhari, V.A.
name: Solanki, C.S.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 820-822
description: In the present paper the two step metallization for low level c-Si concentrator solar cells is studied. The front contact grid of the solar cells is fabricated using two step metallization in which a Ni/Cu or Ni/Ag electroplated contacts are used. In this case Ni is used as a seed layer and deposited on the front surface in a predefined grid pattern, using electro less deposition technique. This deposited Ni is then heated at higher temperature (420 to 450 0C) to form an ohmic contact with the Si. This annealing forms a nickel silicide layer on metal semiconductor interface thus forming an ohmic contact of low resistance. On this silicide layer a high conductivity metal Cu/Ag is then electroplated to give improved conductivity of the metal lines. These Ni/Cu and Ni/Ag metalization patterns are developed on the commercial c-Si solar cell. The cells are then characterized at the low concentration ranges of 1.5 Suns to 8 Suns. An improvement in efficiency is observed in the solar cells along with the improvement in FF (fill factor) for two step metalization (Ni/Cu and Ni/Ag) as compared to commercial Ag fired solar cells. Improvement in FF indicates reduction in series resistance and resistive power loss.
Spectroscopic view on the outburst activity of the symbiotic binary AG Draconis
Creators: name: Leedjärv, Laurits
name: Gális, Rudolf
name: Hric, Ladislav
name: Merc, Jaroslav
name: Burmeister, Maria
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Variations of the emission lines in the spectrum of the yellow symbiotic star AG Dra have been studied for over 14 years (1997 - 2011), using more than 500 spectra obtained on the 1.5-metre telescope at Tartu Observatory, Estonia. The time interval covered includes the major (cool) outburst of AG Dra that started in 2006. Main findings can be summarized as follows: (i) cool and hot outbursts of AG Dra can be distinguished from the variations of optical emission lines; (ii) the Raman scattered emission line of O VI at $λ\,6825$ almost disappeared during the cool outburst; (iii) lower excitation emission lines did not change significantly during the cool outburst, but they vary in hot outbursts and also follow orbital motion; (iv) similarity of variations in AG Dra to those in the prototypical symbiotic star Z And allows to suggest that a "combination nova" model proposed for the latter object might also be responsible for the outburst behaviour of AG Dra.
description: Accepted to MNRAS
Large Ground-Installed PV Systems and Public Acceptance - An Environmental-Psychological Consideration
Creators: name: Zoellner, J.
name: Schweizer-Ries, P.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3828-3832
description: Using an environmental-psychological approach, the present contribution addresses the public acceptance of larger PV ground-installed systems from a socio-scientific perspective. Within the rising utilisation of renewable energy systems (RES) in Germany, also the number of large ground-installed PV systems is growing. However, in some regions this development leads to discussions and serious conflicts within the residential population. Main arguments in the current debate concerning the utilisation of solar energy and ground-installed systems are the changes of landscape and the connected high costs. While in some regions citizens’ form initiatives against large ground installed systems on local levels, other communities apply for leasing their land to investors. A case-comparison study of three different German counties was made to identify relevant social factors for the implementation of large ground-installed systems. In order to address the complexity of the topic the study has been conducted in a multi-modal research design. As a matter of principle, a strong connection between the consideration of procedural justice criteria during the planning and installation process such as transparency, early and accurate information as well as possibilities to participate, and a reported public acceptance towards the PV system became evident. Furthermore, the general attitude towards RES as well as the evaluation of economic issues predicted the acceptance significantly.
Ownership Structure and Dividend Policy of Listed Deposit Money Banks in Nigeria
Creators: name: Yahaya, Onipe Adabenege
Publisher: name: figshare
Year: 2023
Subjects: Corporate governance

description: This study examines the impact of ownership structure on dividend policy of listed deposit money banks in Nigeria from 2009 to 2019. It explores the impact of different investor types on dividend policy of deposit money banks. Dividend policy is measured as dividend yield. As a result, the study predicts dividend behaviour based on ownership structure which is useful since ownership structure has been changing over time. Questions arise whether or not dividend should be paid and to what extent should dividend be paid? The sample is made up of 11 banks. Secondary data were collected from the annual reports of the banks. Robust Tobit Regression was employed in analysing the data. The findings of the study showed that institutional shareholdings, ownership concentration and foreign shareholdings have positive and significant impacts, while managerial shareholdings have negative and significant impact on dividend policy. It was concluded that managerial shareholding will discourage the policy of dividend payment of deposit money banks listed in Nigeria while institutional shareholdings improves the policy of paying dividend in deposit money banks listed in Nigeria. The recommendation of the study among others is that investors in listed DMBs in Nigeria seeking for capital gain to watch out firms with more directors ownership. They may invest in such companies that offer more short-term benefits or gains in capital from the perspective of the investor and also if investors are looking for high short-term dividends, they ought to put into consideration companies who have recently make payment for dividends and look after companies with large institutional investors, because they are more dividend payable. Limitation of the study shows the inability to generalize results to other sectors.
Myostatin regulates the production of fibroblast growth factor 23 (FGF23) in UMR106 osteoblast–like cells
Creators: name: Ewendt, Franz
name: Feger, Martina
name: Föller, Michael
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 570

description: Myostatin is a signaling molecule produced by skeletal muscle cells (myokine) that inhibits muscle hypertrophy and has further paracrine and endocrine effects in other organs including bone. Myostatin binds to activin receptor type 2B which forms a complex with transforming growth factor-β type I receptor (TGF-βRI) and induces intracellular p38MAPK and NFκB signaling. Fibroblast growth factor 23 (FGF23) is a paracrine and endocrine mediator produced by bone cells and regulates phosphate and vitamin D metabolism in the kidney. P38MAPK and NFκB-dependent store-operated Ca2+ entry (SOCE) are positive regulators of FGF23 production. Here, we explored whether myostatin influences the synthesis of FGF23. Fgf23 gene expression was determined by qRT-PCR and FGF23 protein by ELISA in UMR106 osteoblast–like cells. UMR106 cells expressed activin receptor type 2A and B. Myostatin upregulated Fgf23 gene expression and protein production. The myostatin effect on Fgf23 was significantly attenuated by TGF-βRI inhibitor SB431542, p38MAPK inhibitor SB202190, and NFκB inhibitor withaferin A. Moreover, SOCE inhibitor 2-APB blunted the myostatin effect on Fgf23. Taken together, myostatin is a stimulator of Fgf23 expression in UMR106 cells, an effect at least partially mediated by downstream TGF-βRI/p38MAPK signaling as well as NFκB-dependent SOCE.
title: Review: "Red Gas. Russia and the Origins of European Energy Dependence" / Per Högselius. Basingstoke: Palgrave, 2014. ISBN 1137293713
Creators: name: Posaner, Josh
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2020

description: In Red Gas, Per Högselius provides a historical review of the build-out of Soviet gas export infrastructure and the negotiations over accompanying contracts between Moscow and its first capitalist clients during the 1960s and 1970s. It seeks to explain the puzzle of contemporary European reliance on Russian gas, putting in context the disputes over transit and pricing in today's market environment with the first in-depth investigation. The book takes a Large Technical Systems approach to the issue, and combines significant archival research with press coverage from the time. Considerable attention is given to the decision-making processes within the Soviet planning structure, and also by German and Austrian stakeholders eager to secure new supplies of gas.
title: Rezension: "Red Gas. Russia and the Origins of European Energy Dependence" / Per Högselius. Basingstoke: Palgrave, 2014. ISBN 1137293713
Creators: name: Flade, Falk
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2020

description: Per Högselius legt dar, wie und warum politische und wirtschaftliche Entscheidungsträger die schrittweise Ausweitung des Erdgashandels über die Blockgrenzen hinweg durchsetzen konnten. Auf der Grundlage minutiöser Quellenstudien erklärt der Autor, warum gerade dieser kooperative Entwicklungspfad zwischen der Sowjetunion und Westeuropa eingeschlagen wurde. Immerhin widersprach eine Intensivierung der Zusammenarbeit durch den Eisernen Vorhang hindurch fundamental der Logik des Kalten Krieges. Hier geht der Autor auch auf die Position der Amerikaner ein, die insbesondere nach dem sowjetischen Einmarsch in Afghanistan sowie der polnischen Krise zu Beginn der 1980er Jahre ein vehementer Gegner steigender westeuropäischer Abhängigkeiten von sowjetischen Energielieferungen waren.
Current Status of III-V Concentrating Multijunction Manufacturing Technology and Device Technology Development
Creators: name: Newman, F.
name: Aiken, D.
name: Clevenger, B.
name: Chumney, D.
name: Patel, P.
name: Sharps, P.
name: Smith, B.
name: Tourino, C.
name: Wilson, J.
name: Wood, J.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 823-826
description: Manufacturing technology is being developed for the mass-production of III-V multijunction solar cells and receiver sub-assemblies to service the demands of the emerging concentrator PV (CPV) industry. To date, over 1 million 1 cm2 solar cells have been manufactured and tested, representing over 50 MW of power generation capability at 1000 sun concentration. Present-day average efficiency of bare, on-wafer production devices is nearly 40% as measured under a high-throughput custom designed xenon flash simulator (1000 suns, 25ºC). Solar cells ranging from 2 mm2 to 1 cm2 have been custom designed and manufactured for many different system integrators for use in a variety of different systems operating at concentration ratios between 400 and 1000 suns. Furthermore, a receiver sub-assembly manufacturing line has been designed and installed. The progress and results of manufacturing technology development are described.
The next step in the evolution of the CPV industry is the incorporation of solar cells more efficient than those presently being manufactured. The key enabling technology in this area is the inverted metamorphic multijunction (IMM) approach, which is projected to improve relative efficiency by up to 10% over that of existing lattice-matched devices. IMM devices measured at high concentration using a flash tester are consistently measured with open-circuit voltage 300 mV higher than that of their conventional lattice-matched triple junction counterparts. Advanced anti-reflection coating design and epistructure optimization are ongoing to improve the device responsivity, which is presently the limiting performance parameter.
Thermal Management in a Passively Cooled Concentrator Photovoltaic Module
Creators: name: Jaus, J.
name: Hue, R.
name: Wiesenfarth, M.
name: Peharz, G.
name: Bett, A.W.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 832-836
description: To obtain a highly efficient photovoltaic concentrator module together with high reliability and lifetime, the temperature level within such a photovoltaic module must be minimized. Particularly in concentrator modules, high concentration factors and inhomogeneous illumination result in high local heat flux densities. In this paper, a thermal model for a typical Fresnel lens based concentrator module with passive heat sinks is conceptualized. Measurements acquired from a thermal test module are used to determine input parameters for the
FEM-calculations to optimize the thermal management in a concentrator module.
Stability thresholds and calculation techniques for fast entangling gates on trapped ions
Creators: name: Bentley, C D B
name: Taylor, R L
name: Carvalho, A R R
name: Hope, J J
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Fast entangling gates have been proposed for trapped ions that are orders of magnitude faster than current implementations. We present here a detailed analysis of the challenges involved in performing a successful fast gate. We show that the RWA is a stable approximation with respect to pulse numbers: the timescale on which we can neglect terms rotating at the atomic frequency is negligibly affected by the number of pulses in the fast gate. In contrast, we show that the laser pulse instability does give rise to a pulse-number dependent effect; the fast gate infidelity is compounded with the number of applied imperfect pulses. Using a dimensional reduction method presented here, we find bounds on the pulse stability required to achieve two-qubit gate fidelity thresholds.
description: 10 pages, 5 figures
Long-term improvement of chronic low-grade inflammation after bariatric surgery
Creators: name: Lautenbach, Anne
name: Stoll, Fabian
name: Mann, Oliver
name: Busch, Philipp
name: Huber, Tobias B.
name: Kielstein, Heike
name: Bähr, Ina
name: Aberle, Jens
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 610

description: Purpose: Bariatric surgery (BS) was shown to improve inflammatory markers in previous short-term follow-up studies. The aim of the present study was to assess the long-term effects of BS on chronic low-grade inflammation markers related to severe obesity. Moreover, the meaning of the type of BS procedure as well as the remission of type 2 diabetes (T2D) for inflammatory status up to 4 years after BS was analyzed. Materials and Methods: In a retrospective cohort study including 163 patients at baseline, inflammatory and metabolic parameters were assessed at 4 time points: before surgery (baseline), 6 months after surgery (visit 1), 2 years after surgery (visit 2), and 4 years after surgery (visit 3). Univariate regression analysis was used to identify variables that were thought to determine change in inflammatory parameters. Results: CRP, hs-CRP, leucocytes, and ferritin significantly declined in the mid- and long-term according to the U-shaped curve of weight loss (p<0.001). Change in body mass index (BMI) at long-time follow-up showed a significant linear effect on change in leucocytes (B=0.082; p<0.001) and change in hs-CRP (B=0.03; p<0.05). There was a strong, positive correlation between T2D and hs-CRP at visit 2 (rs=0.195; p<0.05) and visit 3 (rs=0.36; p=0.001). With regard to type of surgery and gender, there were no significant differences in inflammatory parameters. Conclusion: BS is able to reduce obesity-related chronic low-grade inflammation up to 4 years after surgical intervention. The improvement in metaflammation is related to the change in BMI and remission of T2D in the long-term.
The Free Form XR Photovoltaic Concentrator: a High Performance SMS3D Design
Creators: name: Cvetkovic, A.
name: Hernandez, M.
name: Benítez, P.
name: Miñano, J.C.
name: Schwartz, J.
name: Plesniak, A.
name: Jones, R.
name: Whelan, D.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 843-848
description: A novel photovoltaic concentrator is presented. The goal is to achieve high concentration design with high efficiency and high acceptance angle that in the same time is compact and convenient for thermal and mechanical management [1]. This photovoltaic system is based on 1 cm2 multi-junction tandem solar cells and an XR concentrator. The XR concentrator in this system is an SMS 3D design formed by one reflective (X) and one refractive (R) free-form surfaces (i.e., without rotational or linear symmetry) and has been chosen for its excellent aspect ratio and for its ability to perform near the thermodynamic limit. It is a mirror-lens device that has no shadowing elements and has square entry aperture (the whole system aperture area is used for collecting light). This large acceptance angle relaxes the manufacturing tolerances of all the optical and mechanical components of the system included the concentrator itself and is one of the keys to get a cost competitive photovoltaic generator. For the geometrical concentration of 1000x the simulation results show the acceptance angle of ±1.8 deg. The
irradiance distribution on the cell is achieved with ultra-short homogenizing prism, whose size is optimised to keep the maximum values under the ones that the cell can accept. The application of the XR optics to high-concentration is being developed in a consortium leaded by The Boeing Company, which has been awarded a project by US DOE in the framework of the Solar America Initiative.
Edge Lower Bounds for List Critical Graphs, via Discharging
Creators: name: Cranston, Daniel W.
name: Rabern, Landon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: A graph $G$ is $k$-critical if $G$ is not $(k-1)$-colorable, but every proper subgraph of $G$ is $(k-1)$-colorable. A graph $G$ is $k$-choosable if $G$ has an $L$-coloring from every list assignment $L$ with $|L(v)|=k$ for all $v$, and a graph $G$ is \emph{$k$-list-critical} if $G$ is not $(k-1)$-choosable, but every proper subgraph of $G$ is $(k-1)$-choosable. The problem of bounding (from below) the number of edges in a $k$-critical graph has been widely studied, starting with work of Gallai and culminating with the seminal results of Kostochka and Yancey, who essentially solved the problem. In this paper, we improve the best lower bound on the number of edges in a $k$-list-critical graph. Our proof uses the discharging method, which makes it simpler and more modular than previous work in this area.
description: 17 pages, 2 figures
Selections from the Solar Cell Connected Education and Research at the Budapest Tech
Creators: name: Nemcsics, A.
name: Turmezei, P.
name: Balazs, Z.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV as Enabling Technology

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3768-3770
description: In this work at first we give a short review about the solar cell related education at our institution. Students can attend on solar cells a whole semester in the frame of an independent subject. Firstly, students study the physical bases of photovoltaic effect and the conventional solar cell constructions. In the next part of the subject, novel solar cell structures (different thin films solar cells, polymer based solar cells etc.) are presented. At the end of the semester, the different solar cell applications and their installation are shown. In this paper, we also present our laboratorial activity. Some aspects of our research related with electrochemical solar cell, amorphous silicon based solar cell and with very high efficiency solar cell are emphasized in our study, too. We close our paper with the presentation of theses and diplom works related solar cells which are made in our institute.
Dye Sensitised Solar Cells Using High Mobility, Transparent Conducting Oxides for Tandem Solar Cell Applications
Creators: name: Bowers, J.
name: Upadhaya, H.M.
name: Calnan, S.
name: Watson, S.J.
name: Hashimoto, R.
name: Nakada, T.
name: Tiwari, A.N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 748-751
description: Dye sensitised solar cells are suitable for use as a top cell in a tandem solar cell structure, with a bottom CIGS solar cell, because their transmission characteristics can be adjusted by changing the particle size of the mesoporous TiO2 layer, and the photosensitising dye used. However, optical losses also occur from the fluorine doped tin oxide electrode, due to free carrier absorption in the NIR region of the solar spectrum, and lower the light available to the bottom cell. To solve this problem, a high mobility transparent conducting oxide (titanium doped indium oxide) has been used as the conducting layer to lower the optical loses in the near infrared through the cell. This increases light transmission from 800nm onwards, whilst maintaining high conductivity in the layer, which could be used in a tandem device. A device efficiency of 6.77% has been fabricated, whilst problems of porous layer delamination, and low temperature stability of the conducting layer have been solved.
Concept of Combined PV/T System Based on Concentrator With Vertical P-N Junctions Solar Cells
Creators: name: Tyukhov, I.
name: Simakin, V.
name: Murashev, V.
name: Poullek, V.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 795-798
description: This paper presents the first results of a research project elaborating at the All-Russian Research Institute of Electrical Engineering (VEI) with co-operation of the State Technological University “Moscow Institute of Steel and Alloys” and Poulek Solar Co Ltd. This research project is devoted to designing, building and testing of concentrator photovoltaic/thermal (PV/T) system based on solar cells with vertical p-n-junctions. The main tendencies in developing solar systems and, particularly, in evolution of integrating solar energy technologies and developing PV/T approach are shown. The main issues on solar cells with vertical p-n-junctions are described. The practical steps in realization of the concept concentrator PV/T system with vertical p-n junction’s solar cells are
demonstrated. The experimental concentrator with PV/T receiver for simultaneous extracting heat and electricity is described.
Localized Charge Transfer Process and Surface Band Bending in Methane Sensing by GaN Nanowires
Creators: name: Patsha, A.
name: Sahoo, P.
name: Amirthapandian, S.
name: Prasad, A. K.
name: Das, A.
name: Tyagi, A. K.
name: Cotta, M. A.
name: Dhara, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The physicochemical processes at the surfaces of semiconductor nanostructures involved in electrochemical and sensing devices are strongly influenced by the presence of intrinsic or extrinsic defects. To reveal the surface controlled sensing mechanism, intentional lattice oxygen defects are created on the surfaces of GaN nanowires for the elucidation of charge transfer process in methane (CH4) sensing. Experimental and simulation results of electron energy loss spectroscopy (EELS) studies on oxygen rich GaN nanowires confirmed the possible presence of 2(ON) and VGa-3ON defect complexes. A global resistive response for sensor devices of ensemble nanowires and a localized charge transfer process in single GaN nanowires are studied in situ scanning by Kelvin probe microscopy (SKPM). A localized charge transfer process, involving the VGa-3ON defect complex on nanowire surface is attributed in controlling the global gas sensing behavior of the oxygen rich ensemble GaN nanowires.
description: 42 pages, 6 figures, Journal
Rede bei der Trauerfeierlichkeit für Prof. Dr. Heinrich Schneebeli, (geb. 31. Juli 1849 - gest. 13. Mai 1890), gehalten in der Predigerkirche zu Zürich
Creators: name: Geiser, Friedrich
Publisher: name: Zentralbibliothek Zürich
Year: 1890
Subjects: subject: 530 Physik
subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Schneebeli, Heinrich

description: Separat-Abdruck aus Nr. 21 Bd. XV der "Schweiz. Bauzeitung"
Progress of IEA-PVPS Task8: Study on Very Large Scale Photovoltaic Power Generation (VLS-PV) Systems on the Deserts
Creators: name: Komoto, K.
name: Kurokawa, K.
name: Ito, M.
name: Macdonald, J.
name: Donini-Ferretti, F.
name: Megherbi, K.
name: Beneking, C.
name: Cunow, E.
name: Ermer, M.
name: Faiman, D.
name: Paletta, F.
name: Sarno, A.
name: Gigliucci, G.
name: Appendino, M.
name: Song, J.
name: Knol, R.
name: Van Der Vleuten, P.
name: Hansen, T.
name: Hayden, H.
name: Enebish, N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV Markets

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3723-3725
description: The objective of IEA PVPS Task8 is to examine and evaluate the potential of Very Large Scale Photovoltaic Power Generation (VLS-PV) Systems on desert areas, which have a capacity ranging from multi- Megawatt to Gigawatt, and to develop practical project proposals for implementing the VLS-PV systems in desert regions. The Task8 started in 1999. Based on these results since 1999, we’ve been in Phase-3 activity (2006-2008). In Phase-3, specific case studies from viewpoints of local, regional and global aspect are carried out, and financial and institutional scenarios and a general instruction for practical project proposals are developed. Also, considerable future technical options implementing VLS-PV system are analysed. Through the activities, Task8 will show the feasibility and the impact of VLS-PV projects, and propose our recommendations for the future.