cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Braided and coboundary monoidal categories
Creators: name: Savage, Alistair
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B37, 18D10 (Primary) 16G20 (Secondary)

description: In this expository paper, we discuss and compare the notions of braided and coboundary monoidal categories. Coboundary monoidal categories are analogues of braided monoidal categories in which the role of the braid group is replaced by the cactus group. We focus on the categories of representations of quantum groups and crystals and explain how while the former is a braided monoidal category, this structure does not pass to the crystal limit. However, the categories of representations of quantum groups of finite type also possess the structure of a coboundary category which does behave well in the crystal limit. We explain this construction and also a recent interpretation of the coboundary structure using quiver varieties. This geometric viewpoint allows one to show that the category of crystals is in fact a coboundary monoidal category for arbitrary symmetrizable Kac-Moody type.
description: 24 pages; v2: minor typos corrected. To appear in the proceedings of the conference "Algebras, Representations and Applications" (Lie and Jordan Algebras, their Representations and Applications - III) in Honour of Prof. Ivan Shestakov's 60th Birthday
Excellent Silicon Surface Passivation with Atomic Layer Deposited SiO2 Thin Films
Creators: name: Li, S.
name: Xu, J.
name: Yang, N.
name: Yuan, X.
name: Liu, C.
name: Li, H.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Homojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 512-515
description: We investigate the surface passivation performance and the passivation mechanism of the low temperature atomic layer deposited silicon dioxide (ALD-SiO2) films. A relatively high deposition temperature of 300 oC is required for ALD-SiO2 to achieve high film quality. Excellent surface passivation can be achieved on both n- and p-type silicon surface by ALD-SiO2 films, which even show the improved thermal stability than the ALD-Al2O3 films. The surface passivation performance of ALD-SiO2 films should be attributed to both chemical passivation and field-effect passivation. High level of positive fixed charge density of over 6×1012 cm-2 can be observed on the optimized annealed ALD-SiO2 films, showing strong field-effect passivation effect, which is significantly different form the thermally-grown SiO2 films. Although the ALD process of SiO2 deposition is more complex than the ALD-Al2O3 process, it still shows the potential as an alternative of ALD-Al2O3 films for that it can be applied on both n+ emitter and p-surface in p-PERC solar cells.
Explicit Kink Solutions in Several One-Parameter Family of Higher Order Field Theory Models
Creators: name: Khare, Avinash
name: Duzgun, Ayhan
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present several one-parameter family of higher order field theory models some of which admit explicit kink solutions with an exponential tail while others admit explicit kink solutions with a power-law tail. Various properties of these families of kink solutions are examined in detail. In particular for models harboring kink solutions with a power-law tail, we show that there is no gap between the zero mode and the beginning of the continuum in the kink stability potential. Further, by applying the recent Manton formalism, we provide estimates for the kink-kink and antikink-kink acceleration and hence the ratio of the corresponding antikink-kink and kink-kink forces.
description: 35 pages, 11 figures
Ultrafast Carrier Dynamics in InGaP/InGaAs/Ge Multi-Junction Solar Cells
Creators: name: Paraskeva, V.
name: Hadjipanayi, M.
name: Theocharides, S.
name: Othonos, A.
name: Georghiou, G.E.
Publisher: name: WIP
Year: 2019
Subjects: Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
III-V and Related Compound Semiconductor Based Devices

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 696-698
description: Carrier dynamics with femtosecond resolution are investigated in the spectral region of InGaP/InGaAs in InGaP/InGaAs/Ge multi-junction solar cells indicating picosecond scale coupling effects between both junctions. Picosecond scale coupling between top and middle junction is evident by the presence of two peaks in the timeresolved differential reflection with 3.1 eV excitation and 1.38 eV probing energy at low temperatures (77 K). Measurements are repeated at higher temperatures (300 K) but no evidence of picosecond scale coupling effects in the material is found in this case. Moreover, measurements with 1.55 eV excitation are carried out aiming at the excitation of carriers far below the band-gap edge of the top junction and thus without the presence of coupling in the tandem.
Detection of Confirmation and Distinction Biases in Visual Analytics Systems
Creators: name: Nalcaci, Atilla Alpay
name: Girgin, Dilara
name: Balki, Semih
name: Talay, Fatih
name: Boz, Hasan Alp
name: Balcisoy, Selim
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Empirical studies in visualization
Visualization design and evaluation methods

description: Cognitive bias is a systematic error that introduces drifts and distortions in the human judgment in terms of visual decomposition in the direction of the dominant instance. It has a significant role in decision-making process by means of evaluation of data visualizations. This paper elaborates on the experimental depiction of two cognitive bias types, namely Distinction Bias and Confirmation Bias, through the examination of cognate visual experimentations. The main goal of this implementation is to indicate the existence of cognitive bias in visual analytics systems through the adjustment of data visualization and crowdsourcing in terms of confirmation and distinction biases. Two distinct surveys that include biased and unbiased data visualizations which are related to a given data set were established in order to detect and measure the level of existence of introduced bias types. Practice of crowdsourcing which is provided by Amazon Mechanical Turk have been used for experimentation purposes through prepared surveys. Results statistically indicate that both distinction and confirmation biases has substantial effect and prominent significance on decision-making process.
description: EuroVis Workshop on Trustworthy Visualization (TrustVis)
description: Papers
description: 13
description: 17
description: Atilla Alpay Nalcaci, Dilara Girgin, Semih Balki, Fatih Talay, Hasan Alp Boz, and Selim Balcisoy
description: CCS Concepts: Human-centered computing --> Empirical studies in visualization; Visualization design and evaluation methods
Analysis of Laser Boron Doping and Laser Damage
Creators: name: Yang, N.
name: Li, S.
name: Liu, C.
name: Yuan, X.
name: Ye, X.
name: Li, H.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Characterisation & Simulation of Si Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 388-391
description: In the present work, laser boron doping and laser damage by taking borosilicate glass formed in conventional boron spin-on dopant diffusion and screen-printed boron paste as dopant sources are studied. Driving-in effect with a low surface doping concentration and a deep junction after laser irradiation was observed when borosilicate glass formed in the conventional boron spin-on dopant diffusion process was applied as dopant source. Meanwhile, relative high surface boron concentration (near 1e21 cm-3) was realized by taking boron paste as dopant source. Junction depth can be adjusted from 0.25 μm to 1.3 μm by shifting laser parameters. When it comes to local back surface field based on p-type wafer, boron paste with a relative high boron content was applied as dopant source, rendering the surface concentration over 1e21 cm-3 and doping depth over 5 μm. Porous silicon ring was observed by SEM and broadened Raman bands present the introduction of amorphous silicon in wafer surface after laser irradiation. Calculated XC values demonstrated over 20% silicon existed in amorphous state. The present work will be helpful to deepen the understanding of laser boron doping as well as laser damage.
The Unhiggs
Creators: name: Stancato, David
name: Terning, John
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine a scenario where the Higgs is part of an approximate conformal field theory, and has a scaling dimension greater than one. Such an unparticle Higgs (or Unhiggs) can still break electroweak symmetry and unitarize WW scattering, but its gauge couplings are suppressed. An Unhiggs model has a reduced sensitivity of the weak scale to the cutoff, and can thus provide a solution to the little hierarchy problem.
description: 21 pages, 9 figures; v2: further discussion, references added, version published in JHEP
Time Response Analysis of Perovskite/Si Tandem Solar Cells
Creators: name: Paraskeva, V.
name: Hadjipanayi, M.
name: Zheng, J.
name: Theocharides, S.
name: Ekins-Daukes, N.J.
name: Ho-Baillie, A.W.Y.
name: Georghiou, G.E.
Publisher: name: WIP
Year: 2019
Subjects: Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
Tandems

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 772-774
description: Perovskite and Silicon solar cells have recently been shown to be perfect partners for tandem devices with potentially very high efficiency at low additional costs over standard Si cells. Several aspects must be considered regarding the characterization of these novel devices. Spectral response or external quantum efficiency measurements of perovskite/Si tandem devices present additional challenges compared to single junction ones due to the series connection of the junctions. Light bias intensity is expected to affect the quantum efficiency of each junction in the tandem since the appropriate current limitation must be applied each time. In this paper, external quantum efficiency measurements have been implemented at different light bias conditions in an attempt to establish the minimum recommended light bias conditions during quantum efficiency measurements of Silicon bottom junction. Furthermore, due to the slow photogenerated characteristics of the perovskite cells, the chopping frequency during quantum efficiency measurements of those devices is expected to be different compared to conventional Silicon cells. In an attempt to investigate this, external quantum efficiency measurements have been conducted at different chopping frequencies.
Higgs boson decay into photons at four loops
Creators: name: Davies, Joshua
name: Herren, Florian
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Future precision measurements of Higgs boson decays will determine the branching fraction for the decay into two photons with a precision at the one percent level. To fully exploit such measurements, equally precise theoretical predictions need to be available. To this end we compute four-loop QCD corrections in the large top quark mass expansion to the Higgs boson--photon form factor, which enter the two-photon decay width at next-to-next-to-next-to-leading order. Furthermore we obtain corrections to the two-photon decay width stemming from the emission of additional gluons, which contribute for the first time at next-to-next-to-leading order. Finally, we combine our results with other available perturbative corrections and estimate the residual uncertainty due to missing higher-order contributions.
description: 18 pages, 4 figures
Shaping Public Sector Transformation: The Promise of a Four-Day Working Week
Creators: name: Oatway, Jodie
name: Shepherd, William
Publisher: name: Transformative Enterprise Research Group
Year: 2024
Subjects: subject: 4 day working week
subject: Public Sector Transformation
subject: Employee Wellbeing
subject: Work-Life Balance
subject: Productivity in the Public Sector
subject: Job Crafting and Work Design
subject: Organizational Culture
subject: organisational change
subject: Recruitment and Retention Challenges
subject: Sustainable Work Practices

description: Executive Summary

This paper explores the resurgence of the Four-Day Working Week (4DWW) and its potential for transforming the UK public sector. Historically rooted in the 19th-century labour rights movements, the 4DWW has re-emerged as a solution to modern work-life challenges, particularly in response to growing concerns around employee wellbeing, burnout, and productivity. With increasing interest in shortening the workweek across both public and private sectors, local councils in the UK, faced with recruitment, retention, and financial pressures, are now considering the 4DWW as a viable long-term strategy for improving service delivery while enhancing workforce satisfaction.

The paper examines key themes, such as the relationship between working hours, employee wellbeing, and productivity. In the public sector, where stress and burnout are exacerbated by resource limitations and high demands, the introduction of a 4DWW could significantly improve employee wellbeing. Research indicates that reduced working hours can alleviate stress and boost productivity by encouraging employees to rethink and streamline their work processes. However, the complexity of measuring productivity in the public sector, where intangible factors such as workplace culture play a significant role, remains a challenge.

Another focal point of the paper is the role of strategic adaptations, such as job crafting and the integration of Artificial Intelligence (AI), in facilitating a successful transition to a 4DWW. AI has the potential to automate repetitive tasks, freeing up valuable time for employees to focus on more meaningful work. While early trials of the 4DWW have shown positive outcomes in both private and public sectors, the findings suggest that public sector organisations will need to make cultural shifts and embrace technology to fully realise the benefits.

The paper concludes by identifying areas for further research, including the long-term impact of the 4DWW on public sector productivity, the role of organisational culture in the successful adoption of reduced working hours, and how AI can be effectively leveraged to support this transition. These areas are critical for addressing the unique challenges faced by the UK's public sector as it seeks to adopt more sustainable and innovative work practices.
การใช้น้ำสกัดชีวภาพจากน้ำมะพร้าวแต่ละระดับเป็นอาหารเสริมสำหรับการปลูกถั่วเหลือง
Creators: name: อภิญญ์ คุ่ยชูชีพ
name: ธวัชชัย ศุภดิษฐ์
Publisher: name: สมาคมนักวิจัย
Year: 2555
Subjects: ถั่วเหลือง,น้ำมะพร้าว,น้ำสกัดชีวภาพ,สารอาหาร,อาหารเสริม

description: 1, 17, วารสารสมาคมนักวิจัย
KLIEP-based Density Ratio Estimation for Semantically Consistent Synthetic to Real Images Adaptation in Urban Traffic Scenes
Creators: name: Savkin, Artem
name: Tombari, Federico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Synthetic data has been applied in many deep learning based computer vision tasks. Limited performance of algorithms trained solely on synthetic data has been approached with domain adaptation techniques such as the ones based on generative adversarial framework. We demonstrate how adversarial training alone can introduce semantic inconsistencies in translated images. To tackle this issue we propose density prematching strategy using KLIEP-based density ratio estimation procedure. Finally, we show that aforementioned strategy improves quality of translated images of underlying method and their usability for the semantic segmentation task in the context of autonomous driving.
Examining the Components of Trust in Map-Based Visualizations
Creators: name: Xiong, Cindy
name: Padilla, Lace M. K.
name: Grayson, Kent
name: Franconeri, Steven
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Laboratory experiments
HCI theory
concepts and models
Empirical studies in HCI

description: Prior research suggests that perceived transparency is often associated with perceived trust. For some data types, greater transparency in data visualization is also associated with an increase in the amount of information depicted. Based on prior work in economics and political science that has identified four dimensions of transparency, we examined the influence of accuracy, clarity, amount of disclosure, and thoroughness on a decision task where participants relied on map-based visualizations with varying complexity to solve a crisis. The results of our preliminary analysis suggest that perceived clarity, amount of disclosure. and thoroughness significantly predicted individuals' selection of a Google Maps-like application with either less information or more information. Trust and perceived accuracy did not significantly predict which navigation application visualization participants decided to use (i.e., one with more information or less information). Further, our preliminary results suggest that an individual's ratings of accuracy and disclosure of a visualization predicted their ratings of the trustworthiness of that visualization. We discuss the implications of a possible dissociation between trust and decision tasks on visualization evaluation. In future work, we aim to examine the influence of the amount of information shown in a visualization on ratings of trust and determine the generalizability of our preliminary findings to different task types and visualization approaches.
description: EuroVis Workshop on Trustworthy Visualization (TrustVis)
description: Papers
description: 19
description: 23
description: Cindy Xiong, Lace M. K. Padilla, Kent Grayson, and Steven Franconeri
description: CCS Concepts: Human-centered computing --> Laboratory experiments; HCI theory, concepts and models; Empirical studies in HCI
Comparison of Light Induced Metastabilities on Different Thin Film Technologies
Creators: name: Mittal, A.
name: Rennhofer, M.
name: Schlosser, V.
name: Lang, W.
Publisher: name: WIP
Year: 2019
Subjects: Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
CI(G)S, CdTe and Related Thin Film Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 681-683
description: Under light exposure, short-term (~min/hours) and long-term (~hours/days) metastable phenomena are found in photovoltaic (PV) devices of thin-film photovoltaic technologies. This study focuses on the investigation of the short-term metastable effect influence on the electrical parameters of different technologies. A reversible metastable effect is seen in the amorphous silicon (a-Si:H), cadmium telluride (CdTe) and Micromorph thin-film technologies, where they all subject to show changes in their electrical performance parameters upon low light exposure, which is driven due to presence of defects [1-3]. The metastability affecting in a thin-film PV device performance can alternate between different states depending on history of illumination, electrical bias, and temperature. This study is important to (a) find a correlation between the low light behavior and the module state (as e.g. rate of degradation), and (b) in principle understand the origin and nature of the metastabilities. Also, how much it can affect a standard power rating of the module.
Coherent destruction of the current through molecular wires using short laser pulses
Creators: name: Kleinekathoefer, Ulrich
name: Li, GuangQi
name: Welack, Sven
name: Schreiber, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A molecular wire coupled to two electron reservoirs is investigated within a tight-binding approach including spin and Coulomb interaction. Under the assumption of weak coupling to the electron reservoirs a quantum master equation can be derived for the electron transport through the wire. Motivated by the phenomenon of coherent destruction of tunneling for monochromatic laser fields, the influence of Gaussian laser pulses on the transport through the wires is studied. For situations in which the maximum amplitude of the electric field fulfills the conditions for the destructive quantum effect the average current through the system can be suppressed even for a wire consisting of only one site. Turning on the electron correlation does not destroy the suppression of the current by the laser.
description: 6 pages, 6 figures
Ground-state long-range order in quasi-one-dimensional Heisenberg quantum antiferromagnets: High-order coupled-cluster calculations
Creators: name: Zinke, Ronald
name: Schulenburg, Joerg
name: Richter, Johannes
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the ground-state magnetic long-range order of quasi-one-dimensional quantum Heisenberg antiferromagnets for spin quantum numbers s=1/2 and s=1. We use the coupled cluster method to calculate the sublattice magnetization in dependence on the inter-chain coupling. We find that for the unfrustrated spin-1/2 system an infinitesimal inter-chain coupling is sufficient to stabilize magnetic long-range order, which is in agreement with results obtained by some other methods. For s=1 we find that a finite inter-chain coupling of about 10% of the in-chain coupling is necessary to stabilize magnetic long-range order. Furthermore, we consider a quasi one-dimensional spin-1/2 system, where a frustrating next-nearest neighbor in-chain coupling is included. We find that for stronger frustration also a finite inter-chain coupling is necessary to have magnetic long-range order in the ground state, where the strength of the inter-chain coupling necessary to establish magnetic long-range order is related to the size of the spin gap of the isolated chain.
description: 6 pages, 7 figures
The radial distribution of type Ia supernovae in early-type galaxies: implications for progenitor scenarios
Creators: name: Forster, Francisco
name: Schawinski, Kevin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the radial distribution of supernova Ia (SNe Ia) in morphologically selected early-type host galaxies from the Sloan Digital Sky Survey (SDSS) and discuss its implications for the progenitor systems of SNe Ia. While new observations of early-type galaxies suggest that they contain small fractions of young stellar populations, they are also the most likely hosts for long time delay SNe Ia. We find that there is no statistically significant difference between the radial distribution of SNe Ia and the light profile of their early-type host galaxies, which are dominated by old, metal-rich stellar populations. This confirms the commonly accepted idea that some SN Ia progenitors have time delays of the order of several Gyr.
description: 5 pages, 5 figures, accepted for publication in MNRAS Letters
Some counterexamples in dynamics of rational semigroups
Creators: name: Stankewitz, Rich
name: Sugawa, Toshiyuki
name: Sumi, Hiroki
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F10 (Primary) 37F50, 30D05 (Secondary)

description: We give an example of two rational functions with non-equal Julia sets that generate a rational semigroup whose completely invariant Julia set is a closed line segment. We also give an example of polynomials with unequal Julia sets that generate a non nearly Abelian polynomial semigroup with the property that the Julia set of one generator is equal to the Julia set of the semigroup. These examples show that certain conjectures in the field of dynamics of rational semigroups do not hold as stated and therefore require the allowance of certain exceptional cases.
description: 13 pages
The impact of binaries on the evolution of star clusters from turbulent molecular clouds
Creators: name: Torniamenti, Stefano
name: Ballone, Alessandro
name: Mapelli, Michela
name: Gaspari, Nicola
name: Di Carlo, Ugo N.
name: Rastello, Sara
name: Giacobbo, Nicola
name: Pasquato, Mario
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Most of massive stars form in binary or higher-order systems in clumpy, sub-structured clusters. In the very first phases of their life, these stars are expected to interact with the surrounding environment, before being released to the field when the cluster is tidally disrupted by the host galaxy. We present a set of N-body simulations to describe the evolution of young stellar clusters and their binary content in the first phases of their life. To do this, we have developed a method that generates realistic initial conditions for binary stars in star clusters from hydrodynamical simulations. We considered different evolutionary cases to quantify the impact of binary and stellar evolution. Also, we compared their evolution to that of King and fractal models with different length scales. Our results indicate that the global expansion of the cluster from hydrodynamical simulations is initially balanced by the sub-clump motion and accelerates when a monolithic shape is reached, as in a post-core collapse evolution. Compared to the spherical initial conditions, the ratio of the 50% to 10% Lagrangian radius shows a very distinctive trend, explained by the formation of a hot core of massive stars triggered by the high initial degree of mass segregation. As for its binary population, each cluster shows a self-regulating behaviour by creating interacting binaries with binding energies of the order of its energy scales. Also, in absence of original binaries, the dynamically formed binaries present a mass dependent binary fraction, that mimics the trend of the observed one.
description: 15 pages, 12 figures, 1 table. Comments welcome
Improving the dE/dx calibration of the STAR TPC for the high-pT hadron identification
Creators: name: Xu, Yichun
name: Barannikova, Olga
name: Bichsel, Hans
name: Dong, Xin
name: Fachini, Patricia
name: Fisyak, Yuri
name: Kocolosky, Adam
name: Mohanty, Bedanga
name: Netrakanti, Pawan
name: Ruan, Lijuan
name: Suarez, Maria Cristina
name: Tang, Zebo
name: van Buren, Gene
name: Xu, Zhangbu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We derive a method to improve particle identification (PID) at high transverse momentum ($p_T$) using the relativistic rise of the ionization energy loss ($rdE/dx$) when charged particles traverse the Time Projection Chamber (TPC) at STAR. Electrons triggered and identified by the Barrel Electro-Magnetic Calorimeter (BEMC), pure protons and pions from $Λ\to p+π^{-}$ ($\barΛ\to \bar{p}+π^{+}$), and $K^{0}_{S}\toπ^{+}+π^{-}$ decays are used to obtain the $dE/dx$ value and its width at given $βγ=p/m$. We found that the deviation of the $dE/dx$ from the Bichsel function can be up to $0.4σ$ ($\sim3%$) in p+p collisions at $\sqrt{s_{NN}}=200$ GeV taken and subsequently calibrated in year 2005. The deviation is approximately a function of $βγ$ independent of particle species and can be described with a function of $f(x) = A+\frac{B}{C+x^{2}}$. The deviations obtained with this method are used to re-calibrate the data sample from p+p collision for physics analysis of identified hadron spectra and their correlations up to transverse momentum of 15 GeV/$c$. The ratio of $e^{-}/e^{+}$ (dominantly from $γ$-conversion) is also used to correct the residual asymmetry in the negative and positive charged hadrons due to momentun distortion in the STAR TPC.
description: 18pages, 10 figures
Relaxation of a dewetting contact line Part 2: Experiments
Creators: name: Delon, G.
name: Fermigier, M.
name: Snoeijer, J. H.
name: Andreotti, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dynamics of receding contact lines is investigated experimentally through controlled perturbations of a meniscus in a dip coating experiment. We first characterize stationary menisci and their breakdown at the coating transition. It is then shown that the dynamics of both liquid deposition and long-wavelength perturbations adiabatically follow these stationary states. This provides a first experimental access to the entire bifurcation diagram of dynamical wetting, confirming the hydrodynamic theory developed in Part 1. In contrast to quasi-static theories based on a dynamic contact angle, we demonstrate that the transition strongly depends on the large scale flow geometry. We then establish the dispersion relation for large wavenumbers, for which we find that sigma is linear in q. The speed dependence of sigma is well described by hydrodynamic theory, in particular the absence of diverging time-scales at the critical point. Finally, we highlight some open problems related to contact angle hysteresis that lead beyond the current description.
description: 20 pages, 11 figures Part 1 is stored as Arxiv 0705.3576
Emerging dissipative phases in a superradiant quantum gas with tunable decay
Creators: name: Ferri, Francesco
name: Rosa-Medina, Rodrigo
name: Finger, Fabian
name: Dogra, Nishant
name: Soriente, Matteo
name: Zilberberg, Oded
name: Donner, Tobias
name: Esslinger, Tilman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Exposing a many-body system to external drives and losses can transform the nature of its phases and opens perspectives for engineering new properties of matter. How such characteristics are related to the underlying microscopic processes of the driven and dissipative system is a fundamental question. Here we address this point in a quantum gas that is strongly coupled to a lossy optical cavity mode using two independent Raman drives, which act on the spin and motional degrees of freedom of the atoms. This setting allows us to control the competition between coherent dynamics and dissipation by adjusting the imbalance between the drives. For strong enough coupling, the transition to a superradiant phase occurs, as is the case for a closed system. Yet, by imbalancing the drives we can enter a dissipation-stabilized normal phase and a region of multistability. Measuring the properties of excitations on top of the out-of-equilibrium phases reveals the microscopic elementary processes in the open system. Our findings provide prospects for studying squeezing in non-Hermitian systems, quantum jumps in superradiance, and dynamical spin-orbit coupling in a dissipative setting.
description: 8 pages manuscript, 16 pages supplemental material
Counsellor supervision : a study of the metaphoric case drawing method of case presentation in a clinical setting
Creators: name: Stone, Daniel Joseph
Publisher: name: University of British Columbia
Year: 2010

description: An exploratory study was conducted to investigate the efficacy of the Metaphoric Case Drawing (MCD) method of case conceptualization in the context of counsellor-trainee supervision. Supervisors and trainees reported a significant increase in understanding in five core counselling areas: increased understanding of the client, the counsellor's role, the client-counsellor relationship, counselling goals, and case presentation effectiveness. Statistical and qualitative data further confirm the effectiveness of the MCD method in providing a more time-efficient means of case presentation (compared with the traditional Verbal Case Debriefing method). The MCD was found to be particularly useful in case presentations in which the clinical material included themes of depression, suicide, relationship problems, and manipulative clients. Based on the present exploratory study, the MCD method provides a vigorous, stimulating tool for the effective supervision and training of counselling students in a crisis intervention and suicide prevention setting.
Density- and elongation speed-dependent error correction in RNA polymerization
Creators: name: Zuo, Xinzhe
name: Chou, Tom
Publisher: name: arXiv
Year: 2021
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Backtracking of RNA polymerase (RNAP) is an important pausing mechanism during DNA transcription that is part of the error correction process that enhances transcription fidelity. We model the backtracking mechanism of RNA polymerase, which usually happens when the polymerase tries to incorporate a mismatched nucleotide triphosphate. Previous models have made simplifying assumptions such as neglecting the trailing polymerase behind the backtracking polymerase or assuming that the trailing polymerase is stationary. We derive exact analytic solutions of a stochastic model that includes locally interacting RNAPs by explicitly showing how a trailing RNAP influences the probability that an error is corrected or incorporated by the leading backtracking RNAP. We also provide two related methods for computing the mean times to error correction or incorporation given an initial local RNAP configuration.
description: 12 pages, 7 figures
Trust in Information Visualization
Creators: name: Mayr, Eva
name: Hynek, Nicole
name: Salisu, Saminu
name: Windhager, Florian
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Information visualization
Visualization design and evaluation methods
General and reference
Surveys and overviews

description: Trust is an important factor that mediates whether a user will rely and build on the information displayed in a visualization. Research in other fields shows that there are different mechanisms of trust building: Users might elaborate the information deeply and gain a good understanding of the uncertainties in the data and quality of the information. But they might also use superficial cues as indicators for trust. Which processes are activated depends on the trustworthiness on the side of the visualization and on the trust perception by the users. We lay out challenges for future research to further improve our understanding of trust in information visualization.
description: EuroVis Workshop on Trustworthy Visualization (TrustVis)
description: Papers
description: 25
description: 29
description: Eva Mayr, Nicole Hynek, Saminu Salisu, and Florian Windhager
description: CCS Concepts: Human-centered computing --> Information visualization,Visualization design and evaluation methods;  General and reference --> Surveys and overviews
PCA detection and denoising of Zeeman signatures in stellar polarised spectra
Creators: name: Gonzalez, M. J. Martinez
name: Ramos, A. Asensio
name: Carroll, T. A.
name: Kopf, M.
name: Velez, J. C. Ramirez
name: Semel, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Our main objective is to develop a denoising strategy to increase the signal to noise ratio of individual spectral lines of stellar spectropolarimetric observations. We use a multivariate statistics technique called Principal Component Analysis. The cross-product matrix of the observations is diagonalized to obtain the eigenvectors in which the original observations can be developed. This basis is such that the first eigenvectors contain the greatest variance. Assuming that the noise is uncorrelated a denoising is possible by reconstructing the data with a truncated basis. We propose a method to identify the number of eigenvectors for an efficient noise filtering. Numerical simulations are used to demonstrate that an important increase of the signal to noise ratio per spectral line is possible using PCA denoising techniques. It can be also applied for detection of magnetic fields in stellar atmospheres. We analyze the relation between PCA and commonly used well-known techniques like line addition and least-squares deconvolution. Moreover, PCA is very robust and easy to compute.
description: accepted to be published in A&A
Highlights of Discoveries for $δ$ Scuti Variable Stars From the Kepler Era
Creators: name: Guzik, Joyce Ann
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The NASA Kepler and follow-on K2 missions (2009-2018) left a legacy of data and discoveries, finding thousands of exoplanets, and also obtaining high-precision long time-series data for hundreds of thousands of stars, including many types of pulsating variables. Here we highlight a few of the ongoing discoveries from Kepler data on $δ$ Scuti pulsating variables, which are core hydrogen-burning stars of about twice the mass of the Sun. We discuss many unsolved problems surrounding the properties of the variability in these stars, and the progress enabled by Kepler data in using pulsations to infer their interior structure, a field of research known as asteroseismology.
description: 15 figures. Review paper submitted to Frontiers in Astronomy and Space Sciences, published in April 2021. Part of research topic Asteroseismology in the Kepler Era
Error Estimates for Approximate Solutions of the Riccati Equation with Real or Complex Potentials
Creators: name: Finster, Felix
name: Smoller, Joel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A method is presented for obtaining rigorous error estimates for approximate solutions of the Riccati equation, with real or complex potentials. Our main tool is to derive invariant region estimates for complex solutions of the Riccati equation. We explain the general strategy for applying these estimates and illustrate the method in typical examples, where the approximate solutions are obtained by glueing together WKB and Airy solutions of corresponding one-dimensional Schrodinger equations. Our method is motivated by and has applications to the analysis of linear wave equations in the geometry of a rotating black hole.
description: 23 pages, LaTeX, 13 figures, minor improvements (published version)
Graph state generation with noisy mirror-inverting spin chains
Creators: name: Clark, S. R.
name: Klein, A.
name: Bruderer, M.
name: Jaksch, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the influence of noise on a graph state generation scheme which exploits a mirror inverting spin chain. Within this scheme the spin chain is used repeatedly as an entanglement bus (EB) to create multi-partite entanglement. The noise model we consider comprises of each spin of this EB being exposed to independent local noise which degrades the capabilities of the EB. Here we concentrate on quantifying its performance as a single-qubit channel and as a mediator of a two-qubit entangling gate, since these are basic operations necessary for graph state generation using the EB. In particular, for the single-qubit case we numerically calculate the average channel fidelity and whether the channel becomes entanglement breaking, i.e., expunges any entanglement the transferred qubit may have with other external qubits. We find that neither local decay nor dephasing noise cause entanglement breaking. This is in contrast to local thermal and depolarizing noise where we determine a critical length and critical noise coupling, respectively, at which entanglement breaking occurs. The critical noise coupling for local depolarizing noise is found to exhibit a power-law dependence on the chain length. For two qubits we similarly compute the average gate fidelity and whether the ability for this gate to create entanglement is maintained. The concatenation of these noisy gates for the construction of a five qubit linear cluster state and a Greenberger-Horne-Zeilinger state indicates that the level of noise that can be tolerated for graph state generation is tightly constrained.
description: 27 pages, 13 figures. To appear in New Journal of Physics
High-density Skyrmion matter and Neutron Stars
Creators: name: Jaikumar, Prashanth
name: Bagchi, Manjari
name: Ouyed, Rachid
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine neutron star properties based on a model of dense matter composed of B=1 skyrmions immersed in a mesonic mean field background. The model realizes spontaneous chiral symmetry breaking non-linearly and incorporates scale-breaking of QCD through a dilaton VEV that also affects the mean fields. Quartic self-interactions among the vector mesons are introduced on grounds of naturalness in the corresponding effective field theory. Within a plausible range of the quartic couplings, the model generates neutron star masses and radii that are consistent with a preponderance of observational constraints, including recent ones that point to the existence of relatively massive neutron stars with mass M 1.7 Msun and radius R (12-14) km. If the existence of neutron stars with such dimensions is confirmed, matter at supra-nuclear density is stiffer than extrapolations of most microscopic models suggest.
description: 27 pages, 5 figures, AASTeX style; to be published in The Astrophysical Journal
AdS4/CFT3 at One Loop
Creators: name: Krishnan, Chethan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I consider semi-classical type IIA strings rotating in the AdS4 part of AdS4 X CP3. The one loop sigma model corrections to this classical solution are used to compute the energy shift, and the result is found to be E-S=f(lambda) ln S with f(lambda)= sqrt{2 lambda} - 5 ln 2 /2 pi + O (1/sqrt{lambda}). Even though the functional forms match, the actual numerical value of this one loop string result differs from the result obtained on the integrable N=6 Chern-Simons (ABJM) theory side.
description: v2,3: 16 pages, refs added, grammar fixed, published version; v4: minor corrections to the published version; v5,6: more refs
Long-Time Asymptotics of the Toda Lattice for Decaying Initial Data Revisited
Creators: name: Krueger, Helge
name: Teschl, Gerald
Publisher: name: arXiv
Year: 2008
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The purpose of this article is to give a streamlined and self-contained treatment of the long-time asymptotics of the Toda lattice for decaying initial data in the soliton and in the similarity region via the method of nonlinear steepest descent.
description: 41 pages
Modelling Acceptor Composition Dependent Voc in Ternary Organic Solar Cells
Creators: name: Singareddy, A.
name: Nair, P.R.
Publisher: name: WIP
Year: 2019
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 80-82
description: Ternary organic solar cells (OSC) offers a promising future for the improvement of the power conversion efficiency (PCE) of low cost flexible photovoltaics. In this regard, the open circuit voltage (Voc) improvement achieved through acceptor mixing ratio is not very well understood. Here through analytical modeling and numerical simulations, we predict that the Voc of ternary bilayer OSCs show a much stronger non-linear dependence on the acceptor mixing ratio than their bulk heterojunction counterparts. These predictions are well supported by experimental results in literature.
Aluminum Based Back Reflectors for Ultrathin Cu(In,Ga)Se2 Solar Cells with ITO Diffusion Barrier
Creators: name: Schneider, T.
name: Scheer, R.
Publisher: name: WIP
Year: 2019
Subjects: Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
CI(G)S, CdTe and Related Thin Film Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 684-688
description: An Aluminum-based back contact with an ITO diffusion barrier on top was studied for ultrathin Cu(In,Ga)Se2 (CIGSe) solar cells. The aim is to increase the reflectance of the electrical back contact compared to the commonly used Mo. JV measurements show an increased short circuit current for Al/ITO based solar cells of 10% for an absorber thickness of 500 nm. EQE measurements display an increased quantum efficiency over nearly the whole wavelength range. Furthermore, the influence of the ITO diffusion barrier thickness on the solar cell was studied. A reduced Jsc was observed for an ITO thickness of 50 nm suggesting that carrier collection may be hindered. The sample temperature during the CIGSe deposition was varied between 480°C and 600°C to investigate its influence on the PV parameter. Overall the results suggest that it is possible to prepare CIGSe solar cells with a high reflective back contact with good electrical properties. This enables not only a thickness reduction of the absorber but also further light management applications for CIGSe based solar cells.
Anomalous dispersion of optical phonons at the neutral-ionic transition: Evidence from diffuse X-ray scattering
Creators: name: D'Avino, Gabriele
name: Girlando, Alberto
name: Painelli, Anna
name: Lemée-Cailleau, Marie-Hélène
name: Soos, Zoltán G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Diffuse X-ray data for mixed stack organic charge-transfer crystals approaching the neutral-ionic phase transition can be quantitatively explained as due to the softening of the optical phonon branch. The interpretation is fully consistent with vibrational spectra, and underlines the importance of electron-phonon coupling in low-dimensional systems with delocalized electrons.
description: 4 pages, 4 figures