cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Galaxy evolution in nearby galaxy groups. III. A GALEX view of NGC 5846, the largest group in the local universe
Creators: name: Marino, Antonietta
name: Mazzei, Paola
name: Rampazzo, Roberto
name: Bianchi, Luciana
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the co-evolution of galaxies in nearby groups (V < 3000 km/s) with a multi-wavelength approach. We analyze GALEX far-UV (FUV) and near-UV (NUV) imaging and SDSS u,g,r,i,z data of groups spanning a large range of dynamical phases. We characterize the photometric properties of spectroscopically-confirmed galaxy members and investigate the global properties of the groups through a dynamical analysis. Here we focus on NGC 5846, the third most massive association of Early-Type Galaxies (ETG) after the Virgo and Fornax clusters. The group, composed of 90 members, is dominated by ETGs (about 80 per cent), and among ETGs about 40\% are dwarfs. Results are compared with those obtained for three groups in the LeoII cloud, which are radically different both in member-galaxy population and dynamical properties. The FUV-NUV cumulative colour distribution and the normalized UV luminosity function (LF) significantly differ due to the different fraction of late-type galaxy population. The UV LF of NGC 5846 resembles that of the Virgo cluster, however our analysis suggests that star-formation episodes are still occurring in most of the group galaxies, including ETGs. The NUV-i colour distribution, the optical-UV colour-colour diagram, and NUV-r vs. Mr colour-magnitude relation suggest that the gas contribution cannot be neglected in the evolution of ETG-type group members. Our analysis highlights that NGC~5846 is still in an active phase of its evolution, notwithstanding the dominance of dwarf and bright ETGs and its virialized configuration.
description: 26 pages, 13 figures, accepted for publication in MNRAS
Achieving acoustic cloak by using compressible background flow
Creators: name: Zhang, Ruo-Yang
name: Zhao, Qing
name: Ge, Mo-Lin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We propose a scheme of acoustic spherical cloaking by means of background irrotational flow in compressible fluid. The background flow forms a virtual curved spacetime and guides the sound waves bypass the cloaked objects. To satisfy the laws of real fluid, we show that spatially distributed mass source and momentum source are necessary to supply. The propagation of sound waves in this system is studied via both geometric acoustics approximation and full wave approach. The analytic solution of sound fields is obtained for plane wave incidence. The results reveal the effect of phase retardation (or lead) in comparison with the ordinary transformation-acoustic cloak. In addition, the ability of cloaking is also evaluated for unideal background flows by analyzing the scattering cross section.
description: 15 pages, 6 figures
Hilbert Transform based Quadrature Hybrid RF Photonic Coupler via a Micro-Resonator Optical Frequency Comb Source
Creators: name: Nguyen, Thach G.
name: Shoeiby, Mehrdad
name: Chu, Sai T.
name: Little, Brent E.
name: Morandotti, Roberto
name: Mitchell, Arnan
name: Moss, David J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a photonic RF Hilbert transformer for broadband microwave in-phase and quadrature-phase generation based on an integrated frequency optical comb, generated using a nonlinear microring resonator based on a CMOS compatible, high-index contrast, doped-silica glass platform. The high quality and large frequency spacing of the comb enables filters with up to 20 taps, allowing us to demonstrate a quadrature filter with more than a 5-octave (3 dB) bandwidth and an almost uniform phase response.
description: 11 pages, 8 figures, 38 references
Efficient Charge Carrier Extraction in Perovskite-Silicon Tandem Solar Cells Investigated by Numerical Simulation
Creators: name: Messmer, C.
name: Schön, J.
name: Würfel, U.
name: Schulze, P.S.C.
name: Schubert, M.C.
name: Bivour, M.
name: Glunz, S.W.
name: Hermle, M.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
Advanced Modeling and Characterization

description: 8th World Conference on Photovoltaic Energy Conversion; 435-437
description: This work presents a comprehensive opto-electrical simulation model in Sentaurus TCAD for perovskite-silicon tandem devices which incorporates sophisticated physical models that allow for an in-depth study of efficient charge carrier extraction in tandem devices.
Physical Layer Security for Massive MIMO Systems Impaired by Phase Noise
Creators: name: Zhu, Jun
name: Schober, Robert
name: Bhargava, Vijay K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we investigate the impact of phase noise on the secrecy performance of downlink massive MIMO systems in the presence of a passive multiple-antenna eavesdropper. Thereby, for the base station (BS) and the legitimate users, the effect of multiplicative phase noise is taken into account, whereas the eavesdropper is assumed to employ ideal hardware. We derive a lower bound for the ergodic secrecy rate of a given user when matched filter data precoding and artificial noise transmission are employed at the BS. Based on the derived analytical expression, we investigate the impact of the various system parameters on the secrecy rate. Our analytical and simulation results reveal that distributively deployed local oscillators (LOs) can achieve a better performance than one common LO for all BS antennas as long as a sufficient amount of power is assigned for data transmission.
description: Invited paper, submitted to IEEE SPAWC 2016
Identifying Defects on Solar Cells Using Magnetic Field Measurements and Artificial Intelligence Trained by a Finite Element Model
Creators: name: Büehler, K.
name: Kaufmann, K.
name: Patzold, M.
name: Sprenger, M.
name: Schoenfelder, S.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
Advanced Modeling and Characterization

description: 8th World Conference on Photovoltaic Energy Conversion; 438-443
description: Renewable energies have an increasing share in the energy supply. In order to ensure the security of this supply, the reliability of the systems is therefore increasingly important. In photovoltaic modules or in manufacturing defective solar cells due to broken busbars, cross-connectors or faulty solder joints must be detected quickly and reliably. This paper shows how the magnetic field imaging method can be used to detect defects in solar cells and modules without contact during operation. For the evaluation of the measurement data several neural networks were used, which were trained with the help of results from finite element simulations. Different training data sets were set up in the simulation model by varying the electrical conductivities of the different parts of the solar cell. There is an advantage of a combination of simulated and experimental training data, which is presented and discussed.
Vortex ring induced large bubble entrainment during drop impact
Creators: name: Thoraval, Marie-Jean
name: Li, Yangfan
name: Thoroddsen, Sigurdur T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: For a limited set of impact conditions, a drop impacting onto a pool can entrap an air bubble as large as its own size. The subsequent rise and rupture of this large bubble plays an important role in aerosol formation and gas transport at the air-sea interface. The large bubble is formed when the impact crater closes up near the pool surface and is known to occur only for drops which are prolate at impact. Herein we use experiments and numerical simulations to show that a concentrated vortex ring, produced in the neck between the drop and pool, controls the crater deformations and pinch-off. However, it is not the strongest vortex rings which are responsible for the large bubbles, as they interact too strongly with the pool surface and self-destruct. Rather, it is somewhat weaker vortices which can deform the deeper craters, which manage to pinch off the large bubbles. These observations also explain why the strongest and most penetrating vortex rings emerging from drop impacts, are not produced by oblate drops but by more prolate drop shapes, as had been observed in previous experiments.
description: Main text: 11 pages, 15 figures; Supplemental Material: 3 pages, 4 figures
Geometric transformations of multidimensional color images based on NASS
Creators: name: Fan, Ping
name: Zhou, Ri-Gui
name: Jing, Naihuan
name: Li, Hai-Sheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present quantum algorithms to realize geometric transformations (two-point swappings, symmetric flips, local flips, orthogonal rotations, and translations) based on an $n$-qubit normal arbitrary superposition state (NASS). These transformations are implemented using quantum circuits consisting of basic quantum gates, which are constructed with polynomial numbers of single-qubit and two-qubit gates. Complexity analysis shows that the global operators (symmetric flips, local flips, orthogonal rotations) can be implemented with $O(n)$ gates. The proposed geometric transformations are used to facilitate applications of quantum images with low complexity.
description: 32 pages
Multi-shell model of ion-induced nucleic acid condensation
Creators: name: Tolokh, Igor S.
name: Drozdetski, Aleksander
name: Pollack, Lois
name: Baker, Nathan A.
name: Onufriev, Alexey V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: We present a semi-quantitative model of condensation of short nucleic acid (NA) duplexes induced by tri-valent cobalt(III) hexammine (CoHex) ions. The model is based on partitioning of bound counterion distribution around singleNA duplex into "external" and "internal" ion binding shells distinguished by the proximity to duplex helical axis. In the aggregated phase the shells overlap, which leads to significantly increased attraction of CoHex ions in these overlaps with the neighboring duplexes. The duplex aggregation free energy is decomposed into attractive and repulsive components in such a way that they can be represented by simple analytical expressions with parameters derived from molecular dynamic (MD) simulations and numerical solutions of Poisson equation. The short-range interactions described by the attractive term depend on the fractions of bound ions in the overlapping shells and affinity of CoHex to the "external" shell of nearly neutralized duplex. The repulsive components of the free energy are duplex configurational entropy loss upon the aggregation and the electrostatic repulsion of the duplexes that remains after neutralization by bound CoHex ions. The estimates of the aggregation free energy are consistent with the experimental range of NA duplex condensation propensities, including the unusually poor condensation of RNA structures and subtle sequence effects upon DNA condensation. The model predicts that, in contrast to DNA, RNA duplexes may condense into tighter packed aggregates with a higher degree of duplex neutralization. The model also predicts that longer NA fragments will condense more readily than shorter ones. The ability of this model to explain experimentally observed trends in NA condensation, lends support to proposed NA condensation picture based on the multivalent "ion binding shells".
Investigation of Photoluminescent Pigments for Ultraviolet Light Wavelength Shifter for Solar Cells
Creators: name: Oliveira, O.J.
name: Crestani, T.
name: Coutinho, N.F.
name: Dias De Freitas, G.T.D.
name: Alvarez, H.S.
name: Gradella Villalva, M.
name: Marques, F.C.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 428-430
description: Although silicon and perovskite solar cells have achieved efficiency of up to 26 % , their efficiency is still limited by several factors, such as the reduced efficiency in the ultraviolet region of the solar spectrum. One of the proposed mechanisms to overcome this problem is to use wavelength shifters. The objective of this work was to investigate optical and structural properties of thin films of common photoluminescent pigments used in several areas, such as coatings, graphic arts, cosmetics and adhesives. Thin films of the pigments and tin dioxide (SnO2) films with embedded pigments were prepared by spin coating. The films excited by ultraviolet laser present emission in the visible region, thus functioning as wavelength shifters, which can potentially be used to improve the absorption of ultraviolet light in solar cell.
Assessing the Effectiveness of Encapsulation Schemes for Perovskite Devices Using Photoluminescence Imaging
Creators: name: Koutsourakis, G.
name: Meroni, S.M.P.
name: Blakesley, J.C.
name: Dix Peek, R.
name: Dixon, R.
name: Van Dyk, E.
name: Obene, P.
name: Arnold, I.
name: Tvapanyan, T.
name: Crozier McCleland, J.
name: Roodt, R.
name: Vorster, F.
name: Howe, A.G.R.
name: Watson, T.M.
name: Araujo De Castro, F.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
Advanced Modeling and Characterization

description: 8th World Conference on Photovoltaic Energy Conversion; 431-434
description: Photovoltaic (PV) devices based on metal halide perovskite technology are typically more sensitive to environmental conditions, such as moisture and oxygen, than conventional inorganic PV materials like silicon. This means scalability and commercialization of perovskite PV technology are reliant upon highly effective and reliable encapsulation schemes. Evaluation of edge seal materials and encapsulation effectiveness can be challenging, especially if contactless schemes for characterisation are required. In this work, a contactless technique to evaluate encapsulation methods for perovskite devices is presented, based on photoluminescence (PL) imaging. Perovskite devices exhibit a strong PL emission signal when illuminated, while there are dramatic changes in the local PL emission when the devices degrade due to interactions with moisture or oxygen. Such changes in PL signal present an effective way to monitor the effectiveness of encapsulation schemes for perovskite devices. Triple-mesoscopic carbon perovskite mini modules were encapsulated with different schemes and subjected to damp heat aging tests at 85 °C/85 % relative humidity in the dark. PL imaging was used at different times during ageing to monitor the spatial PL emission of samples. In addition, encapsulated devices were placed outdoors and were monitored by PL imaging at frequent intervals in order to compare outdoor exposure with accelerated tests. It has been demonstrated that encapsulation failure can be identified at different times during ageing, with an observed decrease in measured short circuit current of the aged device. Novel encapsulation schemes can be tested using this methodology and compared with more common encapsulation methods.
Sphere-of-influence graphs in normed spaces
Creators: name: Naszódi, Márton
name: Pach, János
name: Swanepoel, Konrad
Publisher: name: arXiv
Year: 2016
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 46B20

description: We show that any $k$-th closed sphere-of-influence graph in a $d$-dimensional normed space has a vertex of degree less than~$5^d k$, thus obtaining a common generalization of results of Füredi and Loeb (1994) and Guibas, Pach and Sharir (1994).
description: 3 pages
Optimizing the Positions of Quantum Dot Layers for Light Absorption Enhancement in Quantum Dot Solar Cells with Light Trapping
Creators: name: Oteki, Y.
name: Miyashita, N.
name: Giteau, M.
name: Kitahara, K.
name: Okada, Y.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 419-422
description: We have investigated the effect of light trapping on the photoabsorption in quantum dot (QD) solar cells. Numerical simulations show that optimizing the positions of quantum dot layers can lead to an absorption enhancement using Fabry-Perot (FP) resonance and guided diffracted modes. Further, we experimentally demonstrate that positioning the InAs/GaAs quantum dot layers at the intensity peaks of FP resonance results in an increase of EQE and hence photocurrent. This effect can be used to improve the performance of QD solar cells and also photodetectors.
Scanning Tunneling Spectroscopy Study of Quantum Dot Sized SiGe Alloy Nanocrystals prepared with Nonthermal Capacitively-Coupled Plasma
Creators: name: Uddin, M.S.
name: Khatun, S.
name: Vijayana, C.
name: Rath, J.K.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 423-427
description: We report on the Scanning Tunneling Spectroscopy (STS) study of quantum dot sized SiGe alloy nanocrystals (NCs) to explore its bandgap energies. These alloy NCs have been prepared in a multichamber very high frequency plasma enhanced chemical vapor deposition (VHF PECVD) reactor using a capacitively-coupled plasma technique. The STS study yielded a density of states (DOS) spectrum of NCs in which the conduction band (CB) and valance band (VB) edges were located, in addition, even midgap defect states in the forbidden region in some of the NC samples. The measured bandgap of SiGe alloy NCs in different samples reveals Ge content dependence. Though there was no dopant introduced intentionally during the growth, a shallow p-type nature of alloy NCs has been observed in all the samples even which may be attributed to charged grain boundary defects in high Ge content alloy NCs. The high bandgap value of NCs compared to bulk alloy indicates quantum confinement in the SiGe alloy NCs.
Light Separation for the Lateral System of Luminescent Solar Concentrators
Creators: name: Kulish, M.R.
name: Sachenko, A.V.
name: Kostylyov, V.P.
name: Sokolovskyi, I.O.
name: Shkrebtii / Chkrebiti, A.I.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 412-414
description: Luminescent solar concentrator (LSC) is a device with waveguide (or set of the waveguides) to transport sunlight to a photovoltaic cell attachment, where electricity is generated. We offer a new LSC design with the spectrum splitting on lateral plates. Such design substantially decreases the reflection losses, even though the escape cone losses increase due to absence of sequential utilization of descending photons. Ultimately, the lateral LSC can be substantially more efficient compared to the stacked LSC system. The efficiency of the lateral LSC design is determined by the dispersion system. In this research, we analyse four cases, namely: (i) Ideal solar spectrum separation without losses, considered as the limiting case. (ii) Dispersive prism system with the modeled efficiency above 80%. (iii) The set of dispersive mirrors. The experimental efficiency for every mirror can exceed 90%, but the losses are accumulated as for the stack of the LSC plates. (iv) Diffraction gratings. They are highly efficient for polarized light, but not for the unpolarized solar spectrum in the wide wavelength range. As we established, the dispersive prism and mirrors systems demonstrate the photon transport efficiency exceeding 57% for high-refractive index matrices. Photoconversion efficiency was assessed based on silicon solar cells (SCs).
Characterization of Highly Efficient Silicon-Based Solar Cells with Flat and Textured Surfaces
Creators: name: Sachenko, A.V.
name: Kostylyov, V.P.
name: Vlasiuk, V.M.
name: Perinparajah, G.
name: Sokolovskyi, I.O.
name: Evstigneev, M.
name: Shkrebtii / Chkrebiti, A.I.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
Advanced Modeling and Characterization

description: 8th World Conference on Photovoltaic Energy Conversion; 415-418
description: Since the photoconversion efficiency of the silicon-based solar cells (SCs) is approaching their theoretical fundamental limit close to 29%, further improvement of their performance requires theoretical modeling and/or numerical simulation to optimize the SCs parameters and their design. For several types of high-performance silicon-based SCs with both flat and textured top surfaces, we (i) analyzed experimentally key characteristics, namely external quantum efficiency (EQE), short-circuit current density JL(d), open-circuit voltage VOC, I-V curves and the efficiency ; (ii) modeled these characteristics by a semi-analytical approach, developed by the authors, and (iii) numerically simulated using Quokka, SunSolve and other dedicated software. Analyzing and comparing the combined experimental, modelled and simulated results provide valuable information to further improve the design and enhance the SCs performance. The experimental EQE() curves for high-efficiency silicon planar and textured SCs have been analyzed in terms of the base thickness dependent short-circuit current density JL, calculated using the empirical formula for EQE(), and the same parameters were simulated using Quokka 3. The theoretical and modeling results, dependent on the SCs type and structure, recombination parameters, radiation intensity, etc., agree well with the experiment for the considered IBC type flat and textured SCs.
Dry Ports Service Quality in thiopia: the Case of Modjo and Kaliti Dry Ports and Terminals A- Comparative Study
Creators: name: Regasa, Yodit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: This is a research on comparative study of service quality of Modjo and Kaliti dry ports and terminals. Given the increased importance of dry port and terminal services and the associated inefficiencies and drawbacks in service quality, this study is expected to contribute to the improvement of the dry ports service. This research is conducted with the general objective of comparative analysis of Modjo and Kaliti dry ports and terminals in terms of service quality in the perception of customers through SERVQUAL model.To address the stated research questions, the researcher employed non-experimental, survey type, descriptive and comparative research design. Data was collected from both primary and secondary source; primary data were collected through questionnaires and for secondary data document analysis were made. The study employed probability sampling techniques to select the participant of the study and accordingly, an aggregate of 289 respondents were selected and participated in this study and out of these, data were obtained from 270 respondents. The researcher used SERVQUAL model as research instrument. The data were analyzed using descriptive and inferential approach. Descriptive analysis uses measurement of central tendency and measure of dispersion. Inferential analysis uses correlation so as to assess the relationship between the service quality dimensions and comparing the two dry ports service quality in terms of these dimensions. Data analysis revealed that there is low level of expectation among customers and a corresponding low level of perceived service quality in both dry ports and terminals. Also these SERVQUAL gap score is naught. Moreover, the study has found that Kaliti dry port and terminal performed worse than Modjo. Following these results, recommendations are given to improve the service quality of the two dry ports
Oil price shocks, road transport pollution emissions and residents' health losses in China
Creators: name: Yang, Sheng
name: He, Ling-Yun
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Finance (q-fin.GN)
subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: China's rapid economic growth resulted in serious air pollution, which caused substantial losses to economic development and residents' health. In particular, the road transport sector has been blamed to be one of the major emitters. During the past decades, fluctuation in the international oil prices has imposed significant impacts on the China's road transport sector. Therefore, we propose an assumption that China's provincial economies are independent "economic entities". Based on this assumption, we investigate the China's road transport fuel (i.e., gasoline and diesel) demand system by using the panel data of all 31 Chinese provinces except Hong Kong, Macau and Taiwan. To connect the fuel demand system and the air pollution emissions, we propose the concept of pollution emissions elasticities to estimate the air pollution emissions from the road transport sector, and residents' health losses by a simplified approach consisting of air pollution concentrations and health loss assessment models under different scenarios based on real-world oil price fluctuations. Our framework, to the best of our knowledge, is the first attempt to address the transmission mechanism between the fuel demand system in road transport sector and residents' health losses in the transitional China.
Technology advancement of the CCD201-20 EMCCD for the WFIRST coronagraph instrument: sensor characterization and radiation damage
Creators: name: Harding, Leon K.
name: Demers, Richard T.
name: Hoenk, Michael
name: Peddada, Pavani
name: Nemati, Bijan
name: Cherng, Michael
name: Michaels, Darren
name: Neat, Leo S.
name: Loc, Anthony
name: Bush, Nathan
name: Hall, David
name: Murray, Neil
name: Gow, Jason
name: Burgon, Ross
name: Holland, Andrew
name: Reinheimer, Alice
name: Jorden, Paul R.
name: Jordand, Douglas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Wide Field InfraRed Survey Telescope-Astrophysics Focused Telescope Asset (WFIRST-AFTA) mission is a 2.4-m class space telescope that will be used across a swath of astrophysical research domains. JPL will provide a high-contrast imaging coronagraph instrument - one of two major astronomical instruments. In order to achieve the low noise performance required to detect planets under extremely low flux conditions, the electron multiplying charge-coupled device (EMCCD) has been baselined for both of the coronagraph's sensors - the imaging camera and integral field spectrograph. JPL has established an EMCCD test laboratory in order to advance EMCCD maturity to technology readiness level-6. This plan incorporates full sensor characterization, including read noise, dark current, and clock-induced charge. In addition, by considering the unique challenges of the WFIRST space environment, degradation to the sensor's charge transfer efficiency will be assessed, as a result of damage from high-energy particles such as protons, electrons, and cosmic rays. Science-grade CCD201-20 EMCCDs have been irradiated to a proton fluence that reflects the projected WFIRST orbit. Performance degradation due to radiation displacement damage is reported, which is the first such study for a CCD201-20 that replicates the WFIRST conditions. In addition, techniques intended to identify and mitigate radiation-induced electron trapping, such as trap pumping, custom clocking, and thermal cycling, are discussed.
description: Published in the J. Astron. Telesc. Instrum. Syst. 2(1), 011007 (2016), 31 pages, 18 figures, 9 tables
Comparison of CDS and CDSE Buffer Layers for Antimony Selenide (Sb2Se3) Solar Cells by Vacuum Evaporation
Creators: name: Torabi, N.
name: Zanetti, S.
name: Artegiani, E.
name: Piccinelli, F.
name: Punathil, P.
name: Romeo, A.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 406-408
description: In this work, we study the growth of Sb2Se3 deposited by thermal evaporation on different buffer layers for superstrate configuration thin film solar cells. A comparison between CdS which has been widely used as a buffer layer and CdSe is represented. Selenium vacancies in Sb2Se3 thin film act as recombination centers, and according to the literatures, applying an excessive amount of Se improve the application of solar cell. By using CdSe as a buffer layer, selenium could diffuse into the film and it is supposed to increase the efficiency. In our case both devices show the same efficiency of around 3.5% and higher Jsc for CdSe device. Also, morphology results indicate slightly higher crystal quality for CdSe/Sb2Se3 thin film and the solar cells perform almost the same degradation results.
Linzagolix in moderate to severe symptoms of uterine fibroids: a profile of its use
Creators: name: Fung, Simon
name: Blair, Hannah A.
Publisher: name: Adis Journals
Year: 2023
Subjects: Medicine
Obstetrics and Gynaecology

description: Declarations Funding The preparation of this review was not supported by any external funding. Authorship and conflict of interest S. Fung and H. A. Blair are salaried employees of Adis International Ltd/Springer Nature and declare no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content. Ethics approval, Consent to participate, Consent for publication, Availability of data and material, Code availability Not applicable. Additional information about this Adis Drug Review can be found here. Abstract  Linzagolix (Yselty®) is an orally administered gonadotropin-releasing hormone receptor antagonist approved in the EU for the treatment of moderate to severe symptoms of uterine fibroids in adult women of reproductive age and extends the treatment options in this indication. Linzagolix is available as different treatment regimens: for short-term use to reduce uterine and fibroid volumes; and for longer-term use to manage fibroid-associated symptoms. In two placebo-controlled phase 3 trials, linzagolix as a single agent or in combination with hormonal add-back therapy significantly reduced the proportion of patients with heavy menstrual bleeding, improved other symptoms associated with uterine fibroids (including anaemia and pain) and improved patient quality of life. Linzagolix was generally well tolerated, with hot flushes and headaches being the most common adverse events. © Springer Nature Switzerland AG 2023
Evaluation of HNO3 Doping in Graphene/Silicon Solar Cells by Means of Capacitance - Voltage Curves and Impedance Spectroscopy
Creators: name: Matacena, I.
name: Lancellotti, L.
name: Guerriero, P.
name: Bobeico, E.
name: Lisi, N.
name: Delli Veneri, P.
name: Daliento, S.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 409-411
description: The aim of this work is the study of beneficial effects of HNO3 doping for G/Si SJSCs by means of capacitance versus voltage (C-V) curves and impedance spectroscopy characterizations. Capacitance curves in forward bias allowed to characterize defects distribution at graphene/silicon interface, proving induced defect passivation of molecular doping. Impedance spectra both at reverse and forward bias enforced achieved results. Degradation after storing the solar cell in air was also monitored using the same techniques. AC analyses performed were confirmed by dark current-voltage (I-V) curves collected before doping, after doping and 2 weeks after doping storing cell in air.
Ultrathin GaAs Solar Cells with Rough GaP Light-Trapping Structure and Epitaxial Lift-Off
Creators: name: Van Der Woude, D.
name: Bauhuis, G.
name: Van Der Krabben, L.
name: Daemen, T.
name: Kim, J.J.
name: Mulder, P.
name: Smits, J.
name: Vlieg, E.
name: Schermer, J.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
III-V and Related Compound Semiconductors

description: 8th World Conference on Photovoltaic Energy Conversion; 399-401
description: In this work, ultrathin GaAs solar cells are presented with a rough backscattering structure based on lattice mismatched gallium phosphide, grown with MOCVD. This way, a simple and reproducible light-trapping scheme is introduced with low parasitic absorption and full compatibility with hydrofluoric acid-based epitaxial lift-off. Solar cells with two different GaP surface morphologies are demonstrated and shown to be compatible with epitaxial lift-off without any complications or performance loss. An increase in short-circuit current density of up to 9% is observed, a direct result of the increased photon absorption induced by the scattering of the rough GaP texture.
Gravitoturbulence in magnetised protostellar discs
Creators: name: Riols, A.
name: Latter, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gravitational instability (GI) features in several aspects of protostellar disk evolution, most notably in angular momentum transport, fragmentation, and the outbursts exemplified by FU Ori and EX Lupi systems. The outer regions of protostellar discs may also be coupled to magnetic fields, which could then modify the development of GI. To understand the basic elements of their interaction, we perform local 2D ideal and resistive MHD simulations with an imposed toroidal field. In the regime of moderate plasma beta, we find that the system supports a hot gravito-turbulent state, characterised by considerable magnetic energy and stress and a surprisingly large Toomre parameter $Q~10$. This result has potential implications for disk structure, vertical thickness, ionisation, etc. Our simulations also reveal the existence of long-lived and dense `magnetic islands' or plasmoids. Lastly, we find that the presence of a magnetic field has little impact on the fragmentation criterion of the disk. Though our focus is on protostellar disks, some of our results may be relevant for the outer radii of AGN.
description: MNRAS submitted, revised after reviewer comments
Remote sensing of pressure inside deformable microchannels using light scattering in Scotch tape
Creators: name: Kim, Kyungduk
name: Yu, Hyeonseung
name: Koh, Joonyoung
name: Shin, Jung H.
name: Lee, Wonhee
name: Park, Yongkeun
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a simple but effective method to measure the pressure inside a deformable micro-channel using laser scattering in a translucent Scotch tape. Our idea exploits the fact that the speckle pattern generated by a turbid layer is sensitive to the changes in an optical wavefront of an impinging beam. A change in the internal pressure of a channel deforms the elastic channel, which can be detected by measuring speckle patterns of a coherent laser that has passed through the channel and the Scotch tape. We demonstrate that internal pressure can be remotely sensed with the resolution below 0.1 kPa within a pressure range of 3 kPa after calibration. With its high sensitivity, reproducibility, and easy applicability, the present method will find direct and diverse applications.
Improvement of Passivation Performance of Silicon Nanocrystal/Silicon Oxide Compound Layer by Hydrogen Plasma Treatment
Creators: name: Matsumi, M.
name: Gotoh, K.
name: Wilde, M.
name: Kurokawa, Y.
name: Fukutani, K.
name: Usami, N.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
New Materials, Devices and Conversion Concepts

description: 8th World Conference on Photovoltaic Energy Conversion; 402-405
description: Solar cells using stacks of a polycrystalline silicon layer and an ultra-thin silicon oxide layer have commanded considerable attention due to their high conversion efficiency. However, thinning the silicon oxide film to transport carriers leads to a decrease in passivation performance. Therefore, we have developed the NAnocrystalline Transport Path in Ultra-thin dielectrics for Reinforced passivation (NATURE) contact that combines both thickness and conductivity. Hydrogen plasma treatment (HPT) is an effective method to improve passivation performance. We previously reported that the implied open circuit voltage (i-VOC) was significantly improved after HPT at 500 °C. For further improvement, we here investigate the impact of the HPT duration and the H2 pressure on the i-VOC values and on the hydrogen depth distribution. The i-VOC was measured by the quasi-steady state photo-conductance method and the hydrogen depth distribution was characterized by resonant nuclear reaction analysis (RNRA). This revealed that hydrogen atoms are sufficiently incorporated into the NATURE contact for HPT duration of 15 min at a H2 pressure of 0.5 Torr, yielding the highest i-VOC of 724 mV.
Earth First! Vancouver
Creators: name: Earth First! (Organization)
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Earth First! (Organization)
valueUri: http://id.worldcat.org/fast/643811
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Social groups
valueUri: http://id.worldcat.org/fast/1122482
subject: Deep ecology
valueUri: http://id.worldcat.org/fast/889494
subject: Environmentalism
valueUri: http://id.worldcat.org/fast/913543
subject: Anarchism--Societies, etc.
valueUri: http://id.worldcat.org/fast/808396

description: A brief outline of Earth First! and its' beliefs and goals.
Correlated electronic states of SrVO3 revealed by angle-resolved photoemission spectroscopy
Creators: name: Yoshida, T.
name: Kobayashi, M.
name: Yoshimatsu, K.
name: Kumigashira, H.
name: Fujimori, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this article, we review recent progress in angle-resolved photoemission (ARPES) studies of the Mott-Hubbard-type correlated electron systems SrVO3. It has the d1 electron configuration and is an ideal model compound to study electron correlation effects in normal metal. ARPES studies of bulk single-crystal SrVO3 and CaVO3 have revealed the difference in the mass renormalization of electrons between them. In-situ ARPES studies of thin films fabricated by the pulsed laser deposition method have clarified not only quasi-particle dispersions, which show a kink like high-Tc cuprates, but also finite dispersions in the incoherent part. Self-energy in a wide energy range has been deduced from the ARPES spectral weight using Kramers-Kronig transformation. The obtained self-energy has several structures which yield the incoherent feature and a pseudogap-like dip similar to the high-Tc cuprates. Quantum-well states in ultrathin films of SrVO3 have revealed sub-bands with correlated electrons. These findings of electron correlation effects outlined in the present article would provide a starting point not only for fundamental condensed-matter physics but also for the development of new devices with correlated electrons.
description: 13 pages, 9 figures
Flexible Solar Cell Assemblies- Testing in Harsh Conditions
Creators: name: Campesato, R.
name: Casale, M.
name: Gabetta, G.
name: Fernández Lisbona, E.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
III-V and Related Compound Semiconductors

description: 8th World Conference on Photovoltaic Energy Conversion; 388-391
description: This paper describes the results achieved during the qualification campaign conducted on Solar Cell Assemblies CTJ30-80-SCA manufactured by CESI using the qualified CTJ30-80 thin (80 m) bare solar cells. The results of a set of specific engineering tests grouped under the denomination of “Subgroup M” aimed at verifying the flexibility and the reliability of thin (80 m) solar cells / solar cell assemblies mounted on curved surfaces or on flexible supports are also summarized. The use of solar cell assemblies based on thin solar cells and flexible coverglasses in the fabrication of non-planar solar arrays or flexible structures requires the assessment of the bending capabilities of the solar cell assemblies. The aim of this activity was the identification of procedures and methods to test the cell behavior in bending configuration in BOL and EOL conditions.
Optical Characterization of the InGaAsP Solar Cells with Absolute Electroluminescence Observation
Creators: name: Watanabe, K.
name: Yokota, R.
name: Asami, M.
name: Sodabanlu, H.
name: Nakano, Y.
name: Sugiyama, M.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
III-V and Related Compound Semiconductors

description: 8th World Conference on Photovoltaic Energy Conversion; 392-395
description: The rear-hetero structure InGaAsP (1.04 eV) single junction (RHJ) solar cells are fabricated and investigated in this study. The rear-hetero structure in III-V semiconductor based photovoltaic cell is focused their substantial enhancement of open-circuit voltages (Voc). Because there still a few examples of low bandgap material have been developed for an improved mechanical stacked multijunction solar cells, it is important to qualify the material of lattice-match InGaAs and InGaAsP grown on InP substrate. In addition to the standard light I-V and quantum efficiency (QE) measurement, an absolute measurement of electroluminescence (EL) under the current injection equivalent to the photo-carrier generation with AM1.5G illumination is demonstrated. Owing to the reciprocal relationship between the light absorption and emission in the photovoltaic devices, the device performance is qualified as a luminescent efficiency. Adjusting the lattice matching condition, the obtained RHJ InGaAsP solar cell reached to 0.653V of Voc and the corresponding external radiative efficiency (ERE, ext) is measured as ext ~3.0%.
Comment on "More on Heisenberg's model for high energy nucleon-nucleon scattering"
Creators: name: Block, Martin M.
name: Durand, Loyal
name: Ha, Phuoc
name: Halzen, Francis
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We comment on the treatment of asymptotic black-disk scattering in a recent paper of Nastase and Sonnenschein, Phys.\ Rev.\ D\ {\bf 92}, 015028 (2015), on scattering in an updated version of the Heisenberg model which gives $pp$ and $\bar{p}p$ cross sections which increase at very high energies as $\ln^2s$. We show that the total cross section they define does not correspond to that measured in experiments, with the result that their limit for the ratio $σ_{\rm elas}/σ_{\rm tot}$ is too small by a factor 2. The correct ratio for black-disk scattering, $σ_{\rm elas}/σ_{\rm tot} \rightarrow 1/2$ for $s\rightarrow\infty$, is strongly supported by experiment.
description: 4 pages, 2 figures; Accepted for publication as a Comment in Physical Review D
Thin-Film Solar Cells with MgF2/Ag Back Mirror Patterning for Improved Near-IR Reflectance
Creators: name: Reboucas, L.
name: Bauhuis, G.J.
name: Ohlmann, J.
name: Maasen, J.
name: Vlieg, E.
name: Schermer, J.J.
Publisher: name: WIP
Year: 2022
Subjects: Evolving and Emerging Technologies: Tandems; Thin Film absorbers; III-V; New Materials and Concepts; Advanced Modelling
III-V and Related Compound Semiconductors

description: 8th World Conference on Photovoltaic Energy Conversion; 396-398
description: Combining epitaxial lift-off with a dielectric-metal back mirror can boosts III-V solar cells efficiencies by enhanced photon recycling without sacrificing the costly growth wafer. In this work, GaAs and GaInP/GaInAs solar cells are produced with a patterned MgF2/Ag mirror. The sub-bandgap reflectance increases by 2.1% and 2.6%, respectively, compared to the devices with a full Ag back mirror. We investigate the effect of increased sub-bandgap reflection on the temperature-induced open-circuit voltage degradation during operation in low-pressure environments.
Observation of the phononic Lamb shift with a synthetic vacuum
Creators: name: Rentrop, T.
name: Trautmann, A.
name: Olivares, F. A.
name: Jendrzejewski, F.
name: Komnik, A.
name: Oberthaler, M. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The quantum vacuum fundamentally alters the properties of embedded particles. In contrast to classical empty space, it allows for creation and annihilation of excitations. For trapped particles this leads to a change in the energy spectrum, known as Lamb shift. Here, we engineer a synthetic vacuum building on the unique properties of ultracold atomic gas mixtures. This system makes it possible to combine high-precision spectroscopy with the ability of switching between empty space and quantum vacuum. We observe the phononic Lamb shift, an intruiguing many-body effect orginally conjectured in the context of solid state physics. Our study therefore opens up new avenues for high-precision benchmarking of non-trivial theoretical predictions in the realm of the quantum vacuum.