cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Measurement of Newtonian fluid slip using a torsional ultrasonic oscillator
Creators: name: Willmott, G. R.
name: Tallon, J. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The composite torsional ultrasonic oscillator, a versatile experimental system, can be used to investigate slip of Newtonian fluid at a smooth surface. A rigorous analysis of slip-dependent damping for the oscillator is presented. Initially, the phenomenon of finite surface slip and the slip length are considered for a half-space of Newtonian fluid in contact with a smooth, oscillating solid surface. Definitions are revisited and clarified in light of inconsistencies in the literature. We point out that, in general oscillating flows, Navier's slip length b is a complex number. An intuitive velocity discontinuity parameter of unrestricted phase is used to describe the effect of slip on measurement of viscous shear damping. The analysis is applied to the composite oscillator and preliminary experimental work for a 40 kHz oscillator is presented. The Non-Slip Boundary Condition (NSBC) has been verified for a hydrophobic surface in water to within ~60 nm of |b|=0 nm. Experiments were carried out at shear rate amplitudes between 230 and 6800 /s, corresponding to linear displacement amplitudes between 3.2 and 96 nm.
description: Revised with minor edits for review
Applying Deep Learning Algorithms to EL-Images for Predicting the Module Power
Creators: name: Buerhop-Lutz, C.
name: Hoffmann, M.
name: Reeb, L.
name: Pickel, T.
name: Hauch, J.
name: Maier, A.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 854-859
description: EL-images nicely visualize the cell quality of PV-modules in terms of existing failures like cell cracks and cell fractures. Nonetheless, the benefit of EL-images recorded in the field increases if a direct prediction of the module power is enabled. For the first time, deep learning algorithms are applied to predict the module power using EL-images. The dataset consists of more than 600 EL-images from different crystalline PV module manufactures. Regarding the network architecture, ResNet18 was identified to perform best with respect to computational time and accuracy. The predicted powers are quite accurate: the mean absolute error over the entire data set is 4.57 W. In addition, 72% of the module powers are predicted with a high accuracy of less than 2% error. Finally, it should be emphasized that even the EL-images recorded in the field with perspective distortion and motion blur are suitable for excellent predictions.
The semantics and transformation of imperative programs using horn clauses
Creators: name: Ross, Brian James
Publisher: name: University of British Columbia
Year: 2010

description: The feasibility of using Horn clauses as a means of describing and transforming imperative pro-grams is explored. A logical semantics is derived for a typical imperative language. The style of this semantics permits direct translations between the source language and semantical representations. Given the use of Horn clause logic in logic programming, the semantics is particularly useful since models of computation associated with logic programs can be applied to it. Treating the semantics as a logic program means that, in a program transformation context, the semantic representation is particularly well suited to partial evaluation. To support these ideas, an automatic translation system has been implemented which permits translation between programs written in an imperative language and their logical equivalents. In addition, a partial evaluator has been written which meta-interprets the logical representation of an imperative program to produce a partially evaluated result. Using predicative programming, this result can be translated back into the original source code. Thus the system as a whole performs source-to-source transformations of imperative programs.
Trapping in Multi-Crystalline Silicon Wafers: Impact of Laser Treatment and Firing
Creators: name: Jafari, S.
name: Zhu, Y.
name: Rougieux, F.
name: Hameiri, Z.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 322-325
description: Minority carrier traps in silicon affect photoconductance (PC)-based lifetime measurements at low and medium injection levels. In this study, the presence of minority carrier traps with a long PC decay time constant in multicrystalline silicon wafers is unraveled for the first time. To study these traps even further, the effect of firing and laser treatment on them is investigated. It is shown that firing introduces a metastable state of traps while laser treatment annihilates the trapping effect and seems to affect the trap’s concentration rather than its nature.
Analysis of Digitized PV-Module/System Data for Failure Diagnosis
Creators: name: Buerhop-Lutz, C.
name: Pickel, T.
name: Teubner, J.
name: Doll, B.
name: Hauch, J.
name: Brabec, C.J.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1336-1341
description: EL-images disclose many failures in PV-modules, e. g. cell cracks. Their impact and the relevance of certain defect features on the performance during operation is not known. This study focused on the identification of defective power-relevant cells, their impact on the performance and the degradation. Therefore, pre-cracked, low-performing modules are integrated in a string and monitored on module level. As a result, a statistical analysis of EL-images identified the power-relevant cells. The power of defective modules is extremely sensitive to changing measurement conditions. Historical monitoring data and actual EL-images give evidence that so far no changes of the crack structures of fractured cells occurred. Strong seasonal impact is observed. However, the yield is rather stable during the inspection period.
ACCTING Deliverable 5.7: Pilot Actions implementation report
Creators: name: Botha, Daniel
name: Niethammer, Jannis
Publisher: name: Zenodo
Year: 2025
Subjects: Civil Society
Bottom-up Initiative
Pilot Project
Pilot Process
Behavioural Change
Policy Localisation
Local Governments

description: The ACCTING project team identified 10 ideas for Pilot Actions (PAs) that have high potential to address vulnerabilities in the areas of the European Green Deal. Eight of these each link directly to one of the eight Research Lines in the ACCTING project with thematic focus on mobility, food, energy, or biodiversity, while the final two Pilot Actions contribute to the more thematically cross-cutting theme of youth empowerment and volunteering.

This deliverable focuses on assessing the implementation of Pilot Actions (PAs) through the ACCTING pilot process. This includes an overview of activities undertaken, obstacles and challenges faced, results obtained, possible sustainability and exploitation plans, and suggestions for multiplication and further action.
Passivation and Microstructure of Dual Intrinsic a-Si:H Layers for SHJ Solar Cells
Creators: name: Temmler, J.
name: Bodlak, L.
name: Moldovan, A.
name: Bivour, M.
name: Wolf, A.
name: Rentsch, J.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Heterojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 219-223
description: We demonstrate a high passivation quality of dual a-Si:H(i) layers with excellent implied open circuit voltage values and a beneficial influence by an intermediate H2 plasma treatment made with an industrial inline PECVD tool from Meyer Burger Germany with radio frequency plasma sources (MAiA tool). Furthermore, the correlation between the gas flow ratio of hydrogen to silane during PECV deposition and the microstructure of the aSi:H(i) layers represented by the relative bonding density of monohydrides (Si-H) and dihydrides (Si-H2) obtained by ATR-FTIR analysis is shown. Also the positive impact of an intermediate H2 plasma treatment is illustrated. Finally the resulting passivation quality reached by the use of dual a-Si:H(i) layers is depicted, which enables a significant improvement of the implied open-circuit voltage compared to the single layers, especially in the case of a-Si:H(i/p) layer stacks.
The Baryon Anomaly: Evidence for Color Transparency and Direct Hadron Production at RHIC
Creators: name: Brodsky, Stanley J.
name: Sickles, Anne
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the QCD color transparency of higher-twist contributions to inclusive hadroproduction cross sections, where baryons are produced directly in a short-distance subprocess, can explain several remarkable features of high-$p_T$ baryon production in heavy ion collisions which have recently been observed at RHIC: (a) the anomalous increase of the proton-to-pion ratio with centrality (b): the increased power-law fall-off at fixed $x_T=2p_T/ \sqrt s$ of the charged particle production cross section in high centrality nuclear collisions, and (c): the anomalous decrease of the number of same-side hadrons produced in association with a proton trigger as the centrality increases. We show that correlations between opposite-side hyperons and kaons can provide a clear signature of higher-twist contributions. These phenomena emphasize the importance of understanding hadronization at the amplitude level in QCD illustrate how heavy ion collisions can provide sensitive tools for interpreting and testing fundamental properties of QCD.
description: submitted to Physics Letters B
Coherence loss and recovery of an electron spin coupled inhomogeneously to a one-dimensional interacting spin bath: an adaptive t-DMRG study
Creators: name: Wang, Zhi-Hui
name: Wang, Bing-Shen
name: Su, Zhao-Bin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherence evolution and echo effect of an electron spin, which is coupled inhomogeneously to an interacting one-dimensional finite spin bath via hyperfine-type interaction, is studied using the adaptive time dependent density matrix renormalization group (t-DMRG) method. It is found that the interplay of the coupling inhomogeneity and the transverse intra-bath interactions results in two qualitatively different coherence evolutions, namely, a coherence preserving evolution characterized by periodic oscillation and a complete decoherence evolution. Correspondingly, the echo effects induced by an electron spin flip at time $τ$ exhibit stable recoherence pulse sequence for the periodic evolution and a single peak at $\sqrt 2 τ$ for the decoherence evolution, respectively. With the diagonal intra-bath interaction included, the specific feature of the periodic regime is kept, while the $\sqrt 2τ$-type echo effect in the decoherence regime is significantly affected. To render the experimental verifications possible, the Hahn echo envelope as a function of $τ$ is calculated, which eliminates the inhomogeneous broadening effect and serves for the identification of the different status of the dynamic coherence evolution, periodic versus decoherence.
description: Accepted for publication in Phys. Rev. B
Evaluating USDA’s Baseline Projections
Creators: name: Bora, Siddhartha
name: Katchova, Ani L.
name: Kuethe, Todd
name: Bora, Siddhartha
name: Katchova, Ani L.
name: Kuethe, Todd
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: farm income
subject: commodity projections
subject: forecast evaluation
subject: forecast encompassing
subject: path forecasts
subject: baseline projections
subject: USDA
subject: FAPRI

description: Agricultural baselines play an important role in shaping agricultural policy, yet there are few studies evaluating these projections. This study evaluates the accuracy and informativeness of two widely used baselines for the US farm sector published by the United States Department of Agriculture (USDA) and the Food and Agricultural Policy Research Institute (FAPRI). First, we examine the average percent errors of the projections and perform tests of bias. Second, we use a novel testing framework based on the encompassing principle to test the predictive content of the projections for each horizon (year), determining the longest informative projection horizon. Third, we compare the USDA and FAPRI baseline projections using a multi-horizon framework that considers all projection horizons together. We find that prediction error and bias increase with the horizon's length. The predictive content of the baselines projections for most variables diminishes after 4-5 years from the current year. The multi-horizon comparison suggests that neither the USDA nor the FAPRI projection has uniform or average superior predictive ability over the other projection. Our findings are useful for the agencies producing these baselines, and policymakers, agricultural businesses, and other stakeholders who use them.
Optimization of Triple-Layer Antireflection Coating with SiOx on Black Silicon PERC Solar Cell
Creators: name: Zhang, S.
name: Qian, H.
name: Jie, J.
name: Zhang, X.
name: Wei, Q.
name: Zhao, B.
name: Ni, Z.
name: Lian, W.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Homojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 500-503
description: The texture reflectance of diamond wire sawn polycrystalline silicon wafer can be reduced with black silicon texturization technology. The larger the texture specific surface area is, the lower the reflectance gets. However, in consideration of the surface recombination, effective minority carrier lifetime and open circuit voltage, the pore size and specific surface area of black silicon texture are tightly restricted in industrial application, which results in a bottleneck in the reflectance reduction. In order to further reduce the reflectance of black silicon PERC solar cell and improve the light utilization, the triple-layer antireflection coating was optimized with SiOx, which can broaden the scope of refractive index adjustment. In accordance with the simulation results, the reflectance can be improved in the short wavelengths through substituting the SiNx with SiOx as the third layer of triple-layer antireflection coating. As a result, the short circuit current density and conversion efficiency can be improved, but the fill factor may suffer a slight decline because of the contact resistance problem, which can be solved by tuning the sintering temperature or changing the silver paste in the future.
Factors affecting Attitudes and Use of e-Wallet Services for Generation X and Y Consumers in Bangkok Metropolitan Region
Creators: name: Papawee Net-Aroon
Publisher: name: MSMIS Thammasat University
Year: 2562
Subjects: Theory of planned behavior, technology acceptance model, model of prior experience with safety hazard, attitude and use of e-Wallet

description: Journal of information systems in Business  JISB, 5, 2, 6
Contacting New Solar Cell Metallization Layouts and Contact Quality Surveillance in Solar Cell Production
Creators: name: Ramspeck, K.
name: Waleska, P.
name: Schenk, S.
name: Alt, M.
name: Jakob, R.
name: Meixner, M.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Manufacturing & Production of Si Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 443-446
description: This contribution examines contacting of bare solar cells in solar cell production lines and its effect on IV-curve measurements. Contacting issues are detected using electroluminescence imaging in combination with deeplearning evaluation algorithms. We analyze data from several production lines and observe that contacting issues are frequently observed and alter IV-measurement results. Whereas this study is based on 5 busbar cells, new cell concepts for busbarless, multi-busbar or shingle interconnection pose further requirements to solar cell contacting. In order to meet these requirements, we analyze and compare measurement repeatability and EL-images of solar cells with different metallization layouts, contacted by spring-loaded pin-pairs and using a new contact solution, the cetisPV universal contact probes (ucp). While improving the repeatability of the contacting significantly, robustness to cell shifts and applicability to all investigated solar cell layouts are proven for this new contacting approach.
Additional file 1 of Association of active coping to unfair treatment with perceived stress and depressive symptoms in African Americans: mh-grid study
Creators: name: Ojebuoboh, Ayomide R.
name: Gonzalez-Feliciano, Amparo G.
name: Brown, Kristen M.
name: Khan, Rumana J.
name: Xu, Ruihua
name: DeRoo, Lisa A.
name: Lewis, Jessica
name: Quarells, Rakale C.
name: Davis, Sharon K.
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1.
Lens spaces obtainable by surgery on doubly primitive knots
Creators: name: Ichihara, Kazuhiro
name: Saito, Toshio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: In this paper, we consider which lens spaces are obtainable by Dehn surgery described by Berge on doubly primitive knots. It is given an algorithm to decide whether a given lens space is obtainable by such surgery. Also included is a complete characterization of such surgery yielding lens spaces with Klein bottles.
description: 9 pages, 8 figures
Electron and Proton Irradiation of GaAs Solar Cells
Creators: name: Gruginskie, N.
name: Cappelluti, F.
name: Bauhuis, G.J.
name: Mulder, P.
name: Vlieg, E.
name: Schermer, J.J.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1543-1545
description: The effect of particle irradiation on the performance of GaAs solar cells with a range of architectures is studied. Solar cells with shallow and deep junction design processed on the native wafer as well as into a thin-film were irradiated by 1-MeV electrons with fluence up to 1x1015 e-/cm2 and by 1-MeV protons with fluence up to 1x1013 H+/cm2. The degradation of the cell performance due to irradiation was studied both experimentally and theoretically, with good agreement between modeled and measured data. We identify a degradation of the hetero-interfaces quality due to irradiation exposure, characterized by an increase of the interface recombination velocity. The solar cell performance degradation greatly depends on the junction depth and the thickness of the active layers, and therefore, a shallow junction solar cell processed into a thin-film geometry is found to be the most radiation resilient structure for space applications. The presence of a rear reflector allows the design of thinner devices that show potential for increased beginning-of-life performance and improved radiation hardness.
Edge solitons of topological insulators and fractionalized quasiparticles in two dimensions
Creators: name: Lee, Dung-Hai
name: Zhang, Guang-Ming
name: Xiang, Tao
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An important characteristic of topological band insulators is the necessary presence of in-gap edge states on the sample boundary. We utilize this fact to show that when the boundary is reconnected with a twist, there are always zero-energy defect states. This provides a natural connection between novel defects in the two-dimensional $p_{x}+ip_{y}$ superconductor, the Kitaev model, the fractional quantum Hall effect, and the one-dimensional domain wall of polyacetylene.
description: 4 pages, 4 figures. The figures have been revised. accepted for publication by Physical Review Letters
Factors that determine behavior in dealing with computer threats against loss and theft of financial information: Case studies of accounting programs for small business
Creators: name: Anukoon Noppakhuncharoenchai, Nitaya Wongpinunwatana
Publisher: name: MSMIS Thammasat University
Year: 2562
Subjects: Loss and theft of financial information, accounting software for small businesses, intention to deal with threats, behavior in dealing with threats

description: Journal of information systems in Business  JISB, 5, 2, 66
HD 75289Ab revisited - Searching for starlight reflected from a hot Jupiter
Creators: name: Rodler, F.
name: Kuerster, M.
name: Henning, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We attempt to detect starlight reflected from a hot Jupiter, orbiting the main-sequence star HD 75289Ab. We report a revised analysis of observations of this planetary system presented previously by another research group. Methods. We analyse high-precision, high-resolution spectra, collected over four nights using UVES at the VLT/UT2, by way of data synthesis. We try to interpret our data using different atmospheric models for hot Jupiters. Results. We do not find any evidence for reflected light, and, therefore, establish revised upper limits to the planet-to-star flux ratio at the 99.9% significance level. At high orbital inclinations, where the best sensitivity is attained, we can limit the relative reflected radiation to be less than e = 6.7 x 10-5 assuming a grey albedo, and e = 8.3 x 10-5 assuming an Class IV function, respectively. This implies a geometric albedo smaller than p = 0.46 and p = 0.57, for the grey albedo and the Class IV albedo shape, respectively, assuming a planetary radius of 1.2 RJup.
description: accepted by A&A
Lorentz violation and the proper-time method
Creators: name: Mariz, T.
name: Nascimento, J. R.
name: Petrov, A. Yu.
name: Santos, L. Y.
name: da Silva, A. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we apply the proper-time method to generate the Lorentz-violating Chern-Simons terms in the four-dimensional Yang-Mills and non-linearized gravity theories. It is shown that the coefficient of the induced Chern-Simons term is finite but regularization dependent.
description: 11 pages, Revtex4
Not to normal order - Notes on the kinetic limit for weakly interacting quantum fluids
Creators: name: Lukkarinen, Jani
name: Spohn, Herbert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 82C10; 82C40

description: The derivation of the Nordheim-Boltzmann transport equation for weakly interacting quantum fluids is a longstanding problem in mathematical physics. Inspired by the method developed to handle classical dilute gases, a conventional approach is the use of the BBGKY hierarchy for the time-dependent reduced density matrices. In contrast, our contribution is motivated by the kinetic theory of the weakly nonlinear Schrodinger equation. The main observation is that the results obtained in the latter context carry over directly to weakly interacting quantum fluids provided one does not insist on normal order in the Duhamel expansion. We discuss the term by term convergence of the expansion and the equilibrium time correlation .
description: 43 pages, corrected typos, updated assumptions in sec. 7
Brane cosmological solutions in six-dimensional warped flux compactifications
Creators: name: Kobayashi, Tsutomu
name: Minamitsuji, Masato
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study cosmology on a conical brane in the six-dimensional Einstein-Maxwell-dilaton system, where the extra dimensions are compactified by a magnetic flux. We systematically construct exact cosmological solutions using the fact that the system is equivalently described by (6+n)-dimensional pure Einstein-Maxwell theory via dimensional reduction. In particular, we find a power-law inflationary solution for a general dilatonic coupling. When the dilatonic coupling is given by that of Nishino-Sezgin chiral supergravity, this reduces to the known solution which is not inflating. The power-law solution is shown to be the late-time attractor. We also investigate cosmological tensor perturbations in this model using the (6+n)-dimensional description. We obtain the separable equation of motion and find that there always exist a zero mode, while tachyonic modes are absent in the spectrum. The mass spectrum of Kaluza-Klein modes is obtained numerically.
description: 12 pages, 2 figures; v2: references added; v3: version published in JCAP
Additional file 1 of Synergistic effect of combination chemotherapy with praziquantel and DW-3-15 for Schistosoma japonicum in vitro and in vivo
Creators: name: Yang, Zi-Yin
name: Liu, Zi-Hao
name: Zhang, Ya-Nan
name: Li, Chen
name: Liu, Lei
name: Pu, Wen-Jie
name: Xie, Shi-Qi
name: Xu, Jing
name: Xia, Chao-Ming
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Additional file 1: Table S1. Viability of S. japonicum males exposed to PZQ and DW-3-15 at different combinations of concentrations in vitro. Table S2. Viability of S. japonicum females exposed to PZQ and DW-3-15 at different combinations of concentrations in vitro. Table S3. Viability of S. japonicum juveniles exposed to PZQ and DW-3-15 at different combinations of concentrations in vitro. Table S4. Antischistosomal effects of S. japonicum juvenile (14 days) treated by PZQ and DW-3-15 at different combinations of concentrations in vivo. Table S5. Antischistosomal effects of multiple developmental stages of S. japonicum treated by PZQ and DW-3-15 at different combinations of concentrations in vivo. Table S6. Antischistosomal effects of adult (28 days) of S. japonicum treated by PZQ and DW-3-15 at different combinations of concentrations in vivo.
Group communication in distributed system T-Shoshin
Creators: name: See, Helen Lim
Publisher: name: University of British Columbia
Year: 2010

description: T-Shoshiri is a distributed operating system for developing and testing distributed software. It provides a flexible and extensive one-to-one (1-1) interprocess communication (IPC) facility. However a number of applications, such as notification and query, require the use of group communication in which a process sends a message simultaneously to a group of processes. This thesis discusses how the 1-1 IPC facility on T-Shoshin was extended to provide a group interprocess communication service. The notion of groups will first be described, focusing on how they are referenced, formed and maintained. Finally a semantic model for group communication is presented, that is simple and general enough to accommodate most forms of applications that require group communication. Then an implementation model is discussed to show how the semantic model was implemented, followed by a performance evaluation of the implementation.
Contact Resistivity of the TCO/a-Si:H/c-Si Heterojunction
Creators: name: Luderer, C.
name: Messmer, C.
name: Hermle, M.
name: Bivour, M.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Heterojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 538-540
description: Transport related losses in the heterojunction stack are a limitation on the power output of silicon heterojunction solar cells. We present contact resistivity measurements of the electron and hole contact of our silicon heterojunctions, which enable fill factors above 80 % on cell level. Our systematic investigation of the influence of different layers reveals, that the intrinsic a-Si:H and the ITO layer significantly increases transport losses, especially for the hole contact. Experimental results are supported by good correlation with numerical device simulation.
A Self-Consistent, Time-Dependent Treatment of Dynamical Friction: New Insights regarding Core Stalling and Dynamical Buoyancy
Creators: name: Banik, Uddipan
name: Bosch, Frank C. van den
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dynamical friction is typically regarded a secular process, in which the subject ('perturber') evolves very slowly (secular approximation), and has been introduced to the host over a long time (adiabatic approximation). These assumptions imply that dynamical friction arises from the LBK torque with non-zero contribution only from pure resonance orbits. However, dynamical friction is only of astrophysical interest if its timescale is shorter than the age of the Universe. In this paper we therefore relax the adiabatic and secular approximations. We first derive a generalized LBK torque, which reduces to the LBK torque in the adiabatic limit, and show that it gives rise to transient oscillations due to non-resonant orbits that slowly damp out, giving way to the LBK torque. This is analogous to how a forced, damped oscillator undergoes transients before settling to a steady state, except that here the damping is due to phase mixing rather than dissipation. Next, we present a self-consistent treatment, that properly accounts for time-dependence of the perturber potential and circular frequency (memory effect), which we use to examine orbital decay in a cored galaxy. We find that the memory effect results in a phase of accelerated, super-Chandrasekhar friction before the perturber stalls at a critical radius, $R_{\mathrm{crit}}$, in the core (core-stalling). Inside of $R_{\mathrm{crit}}$ the torque flips sign, giving rise to dynamical buoyancy, which counteracts friction and causes the perturber to stall. This phenomenology is consistent with $N$-body simulations, but has thus far eluded proper explanation.
description: Accepted for publication in ApJ; 22 pages, 5 figures
From Day-Ahead PV Forecast to PV Regulation: Imbalance Mitigation Strategies for the Italian Case Study
Creators: name: Pierro, M.
name: Perez, R.
name: Perez, M.
name: Moser, D.
name: Cornaro, C.
Publisher: name: WIP
Year: 2019
Subjects: PV Applications and Integration
PV Driven Energy Management and System Integration

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1719-1724
description: This study deals with the increase of power imbalance and its related cost due to the growth of solar penetration. We applied state-of-the-art day-ahead solar and load forecast models to predict residual load of Italy. Using these models and real data provided by the Italian TSO, we suggest and test different imbalance mitigation strategies and we compute the resulting imbalance volume and cost at different PV penetration levels. We show how the imbalance can be set to a fixed value regardless of PV installed capacity, allowing for a massive solar penetration. The strategies consists in: (1) Improving the accuracy of PV and residual load power forecast (2) Enlarging the footprint of the forecast controlled area; (3) Implement PV imbalance regulation through flexible PV power plants based on battery energy storage systems (BESS) and pro-active curtailment able to adapt the PV generation to the predicted profile.
Electron stripping and re-attachment at atomic centers using attosecond half-cycle pulses
Creators: name: Emmanouilidou, A.
name: Uzer, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate the response of two three-body Coulomb systems when driven by attosecond half-cycle pulses: The hydrogen molecular ion and the helium atom. Using very short half-cycle pulses (HCPs) which effectively deliver ``kicks'' to the electrons, we first study how a carefully chosen sequence of HCPs can be used to control to which of one of the two fixed atomic centers the electron gets re-attached. Moving from one electron in two atomic centers to two electrons in one atomic center we then study the double ionization from the ground state of He by a sequence of attosecond time-scale HCPs, with each electron receiving effectively a ``kick'' from each HCP. We investigate how the net electric field of the sequence of HCPs affects the total and differential ionization probabilities.
FDTD Simulations of Structures Created by the Black-SiN Method to Optimize the Reflection Reduction of Solar Cells
Creators: name: John, M.
name: Hirsch, J.
name: Bernhard, N.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Characterisation & Simulation of Si Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 378-380
description: The Black-SiN method is a promising technique to reduce the reflection of silicon solar cells. The maskless plasma texturing of a SiN-layer leads to a structure in the sub µm scale [1]. As described in [1], the optical properties of these structures can be simulated by various methods. In our work, we investigated the impact of the structure width, the structure height and the SiN-layer thickness on the solar cell reflection. Using the Finite Difference Time Domain (FDTD) method, the optical properties of two different structures were simulated in dependence of an incident wavelength between 250 nm and 1000 nm. Based on these results, the average reflection was calculated and the cell efficiency was simulated with PC1D. It is shown that a minimum in reflection can be achieved with a Black-SiN texture on pyramid structured silicon. The reduction of the average reflection is approx. 1.6% absolute. This improvement leads to a theoretical cell efficiency improvement of 0.54 % compared to wet chemical etched textures on silicon.
Hyperbolicity and the effective dimension of spatially-extended dissipative systems
Creators: name: Yang, Hong-liu
name: Takeuchi, Kazumasa A.
name: Ginelli, Francesco
name: Chaté, Hugues
name: Radons, Günter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show, using covariant Lyapunov vectors, that the chaotic solutions of spatially extended dissipative systems evolve within a manifold spanned by a finite number of physical modes hyperbolically isolated from a set of residual degrees of freedom, themselves individually isolated from each other. In the context of dissipative partial differential equations, our results imply that a faithful numerical integration needs to incorporate at least all physical modes and that increasing the resolution merely increases the number of isolated modes.
description: 4 pages, 4 figures
The Impact of Futures Contract Storage Rate Policy on Convergence Expectations in Domestic Commodity Markets
Creators: name: Goswami, Alankrita
name: Adjemian, Michael K.
name: Karali, Berna
name: Goswami, Alankrita
name: Adjemian, Michael K.
name: Karali, Berna
Publisher: name: Unknown
Year: 2021
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: basis
subject: commodity futures
subject: convergence
subject: grain
subject: storage

description: Grain futures contracts that permit physical delivery do so through an exchange of delivery instruments. Because delivery instruments can be held indefinitely, extant research shows that futures contracts that assign inflexible and low storage rates relative to the market price of storage facilitate basis nonconvergence. In response to the notable episode of non-convergence in the mid- to late-2000s, the Chicago Mercantile Exchange (CME) introduced variable storage rate (VSR) policies in the soft red winter (SRW) wheat and hard red winter wheat markets. The VSR mechanism functions by adjusting the storage rate to the price spread between sequential futures contract deliveries in the period right before the expiration of the nearby contract. In contrast, CME did not introduce a VSR to corn and soybean markets but chose to increase their fixed storage fees in 2008 and later in 2020. We study convergence performance for each of these markets from 2006-2020 and use time series techniques to show that flexible storage fee policies like the VSR reduce the magnitude and therefore the expected duration of nonconvergence in wheat markets. On the other hand, we do not find evidence that CME's higher fixed storage rates likewise reduce the expected duration of nonconvergence episodes in corn and soybeans markets - although perhaps not enough time has passed to evaluate the effectiveness of the most recent changes - or that index trader activity causes basis nonconvergence.
Unveiling the nature of 11 dusty star-forming galaxies at the peak of cosmic star formation history
Creators: name: Pantoni, L
name: Lapi, A
name: Massardi, M
name: Donevski, D
name: Bressan, A
name: Silva, L
name: Pozzi, F
name: Vignali, C
name: Talia, M
name: Cimatti, A
name: Ronconi, T
name: Danese, L
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a panchromatic study of 11 (sub-)millimetre selected DSFGs with spectroscopically confirmed redshift ($1.5< z_{\rm spec}<3$) in the GOODS-S field, with the aim of constraining their astrophysical properties (e.g., age, stellar mass, dust and gas content) and characterizing their role in the context of galaxy evolution. The multi-wavelength coverage of GOODS-S, from X-rays to radio band, allow us to model galaxy SED by using CIGALE with a novel approach, based on a physical motivated modelling of stellar light attenuation by dust. Median stellar mass ($\simeq6.5\times10^{10}$ M$_\odot$) and SFR ($\simeq241$ M$_\odot$ yr$^{-1}$) are consistent with galaxy main-sequence at $z\sim2$. The galaxies are experiencing an intense and dusty burst of star formation (median L$_{\rm IR}\simeq2\times10^{12}$ L$_\odot$), with a median age of $750$ Myr. The high median content of interstellar dust (M$_{\rm dust}\simeq5\times10^8$ M$_\odot$) suggests a rapid enrichment of the ISM (on timescales $\sim10^8$ yr). We derived galaxy total and molecular gas content from CO spectroscopy and/or Rayleigh-Jeans dust continuum ($10^{10}\lesssim$ M$_{\rm gas}/$M$_\odot\lesssim10^{11}$), depleted over a typical timescale $τ_{\rm depl}\sim200$ Myr. X-ray and radio luminosities suggest that most of the galaxies hosts an accreting radio silent/quiet SMBH. This evidence, along with their compact multi-wavelength sizes (median r$_{\rm ALMA}\sim$ r$_{\rm VLA}=1.8$ kpc, r$_{\rm HST}=2.3$ kpc) measured from high-resolution imaging ($θ_{\rm res}\lesssim$ 1 arcsec), indicates these objects as the high-z star-forming counterparts of massive quiescent galaxies, as predicted e.g., by the in-situ scenario. Four objects show some signatures of a forthcoming/ongoing AGN feedback, that is thought to trigger the morphological transition from star-forming disks to ETGs.
description: 23 pages, 6 figures, 13 tables. Accepted for publication in MNRAS
Performance Test of New PV-Forecasting Models in Realistic Environments
Creators: name: Gaisberger, L.
name: Höller, R.
name: Rechberger, P.
name: Voronych, O.
name: Traunmüller, W.
name: Backmann, M.
name: Diewald, N.
name: Vattapally, M.
name: Praher, P.
name: Ehrlinger, M.
name: Rodin, V.
name: Moser, S.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1428-1432
description: In this paper new methods of PV-forecasting are evaluated in different simulation studies to calculate their performance in terms of economic value. The focus lies on energy management in residential PV-systems with battery storage and micro-grids powered by different sources. The micro-grid simulation was built up without physical models and consists of two diesel generators, (gensets) a PVsystem and a fixed load profile. The results show that the necessary spinning reserve can be reduced by the use of PVpower forecasting. This leads to better utilization of the PV-System as well as cost reductions in comparison to systems without forecast. The total energy costs can be lowered by around 3.3 % to 3.4 % depending on the PV generation profile and the forecast quality. These results apply only for the chosen system setup, whereas for larger PV arrays or higher number of gensets the economic benefit is expected to be higher. The second application investigated in this paper is a residential PV-system with an energy storage. This simulation model was built up with a physical inverter and battery model. An energy management controller optimizing for financial benefits using forecasts resulted in annual electricity costs lowered by 2.1 % to 2.5 % compared to a standard storage battery controller. We assumed that the load profile was assumed to be predicted perfectly. This moderate results arise out of the tariff gap between electricity consumption (duties and taxes are added) and feed-in, leaving little scope for optimization.
Measurement of particle and bubble accelerations in turbulence
Creators: name: Volk, Romain
name: Mordant, Nicolas
name: Verhille, Gautier
name: Pinton, Jean-François
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We use an extended laser Doppler technique to track optically the velocity of individual particles in a high Reynolds number turbulent flow. The particle sizes are of the order of the Kolmogorov scale and the time resolution, 30 microseconds, resolves the fastest scales of the fluid motion. Particles are tracked for mean durations of the order of 10 Kolmogorov time scales. The fastest scales of the particle motion are resolved and the particle acceleration is measured. For neutrally buoyant particles, our measurement matches the performance of the silicon strip detector technique introduced at Cornell University \cite{Voth,MordantCornell}. This reference dynamics is then compared to that of slightly heavier solid particles (density 1.4) and to air bubbles. We observe that the acceleration variance strongly depends on the particle density: bubbles experience higher accelerations than fluid particles, while heavier particles have lower accelerations. We find that the probability distribution functions of accelerations normalized to the variance are very close although the air bubbles have a much faster dynamics.
description: 4 pages
Limit theorems for quantum walks driven by many coins
Creators: name: Segawa, Etsuo
name: Konno, Norio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain some rigorous results on limit theorems for quantum walks driven by many coins introduced by Brun et al. in the long time limit. The results imply that whether the behavior of a particle is quantum or classical depends on the three factors: the initial qubit, the number of coins M, d= [t/M], where t is time step. Our main theorem shows that we can see a transition from classical behavior to quantum one for a class of three factors.
description: 14 pages, Journal-ref. added
Statistical Learning for Nonlinear Dynamical Systems with Applications to Aircraft-UAV Collisions
Creators: name: Liu, Xinchao
name: Liu, Xiao
name: Kaman, Tulin
name: Lu, Xiaohua
name: Lin, Guang
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy
subject: Computational Biology

description: This article investigates a physics-informed statistical approach capable of (i) learning nonlinear system dynamics by using data generated from a nonlinear system as well as the underlying governing physics, and (ii) predicting system dynamics with reasonable accuracy and a computational speed much faster than numerical methods. The proposed approach obtains the reduced-order model from the full-order governing equations. A function-to-function regression, based on multivariate Functional Principal Component Analysis, establishes the mapping between external forcing and system dynamics, while a multivariate Gaussian Process is used to capture the relationship between parameters and external forcing. In the application, the proposed approach is applied to predict aircraft nose skin deformation after Unmanned Aerial Vehicle (UAV) collisions at different impact attitudes (i.e., pitch, yaw and roll degrees). We show that the proposed physics-informed statistical model can achieve a 12% out-of-sample mean relative error, and is more than 103 times faster than Finite Element Analysis (FEA). Computer code and sample data are available on GitHub.
Impact of Silicon Nitride Film Properties on Hydrogen In-Diffusion into Crystalline Silicon
Creators: name: Bredemeier, D.
name: Walter, D.C.
name: Heller, R.
name: Schmidt, J.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 112-115
description: Hydrogen-rich silicon nitride films deposited on top of crystalline silicon wafers are a common source of hydrogen within solar cell production. Upon rapid thermal annealing (RTA), hydrogen bonds within the silicon nitride films dissociate and the hydrogen diffuses both into the environment as well as into the silicon bulk. Within this study, we investigate the impact of silicon nitride material properties on the amount of hydrogen introduced into the silicon bulk during RTA treatment. The measurements clearly show that the atomic density of the silicon nitride film has a pronounced impact on the hydrogen in-diffusion. Importantly, we find that the total hydrogen loss during RTA within the silicon nitride films is not correlated with the actual amount of hydrogen introduced into the silicon bulk.