cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
What can a mathematician do in neuroscience?
Creators: name: Karbowski, Jan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Mammalian brain is one of the most complex objects in the known universe, as it governs every aspect of animal's and human behavior. It is fair to say that we have a very limited knowledge of how the brain operates and functions. Computational Neuroscience is a scientific discipline that attempts to understand and describe the brain in terms of mathematical modeling. This user-friendly review tries to introduce this relatively new field to mathematicians and physicists by showing examples of recent trends. It also discusses briefly future prospects for constructing an integrated theory of brain function.
description: Essay for prospective graduate students in "Computational Neuroscience"
Topological plasma transport from a diffusion view
Creators: name: Liu, Zhoufei
name: Huang, Jiping
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Recent studies have identified plasma as a topological material. Yet, these researches often depict plasma as a fluid governed by electromagnetic fields, i.e., a classical wave system. Indeed, plasma transport can be characterized by a unique diffusion process distinguished by its collective behaviors. In this work, we adopt a simplified diffusion-migration method to elucidate the topological plasma transport. Drawing parallels to the thermal conduction-convection system, we introduce a double ring model to investigate the plasma density behaviors in the anti-parity-time reversal (APT) unbroken and broken phases. Subsequently, by augmenting the number of rings, we have established a coupled ring chain structure. This structure serves as a medium for realizing the APT symmetric one-dimensional (1D) reciprocal model, representing the simplest tight-binding model with a trivial topology. To develop a model featuring topological properties, we should modify the APT symmetric 1D reciprocal model from the following two aspects: hopping amplitude and onsite potential. From the hopping amplitude, we incorporate the non-reciprocity to facilitate the non-Hermitian skin effect, an intrinsic non-Hermitian topology. Meanwhile, from the onsite potential, the quasiperiodic modulation has been adopted onto the APT symmetric 1D reciprocal model. This APT symmetric 1D Aubry-André-Harper model is of topological nature. Additionally, we suggest the potential applications for these diffusive plasma topological states. This study establishes a diffusion-based approach to realizing topological states in plasma, potentially inspiring further advancements in plasma physics.
description: This letter has been published on Chinese Physics Letters as an express letter.Comments are welcome!
Energy deposition by heavy ions: Additivity of kinetic and potential energy contributions in hillock formation on CaF2
Creators: name: Wang, Y. Y.
name: Grygiel, C.
name: Dufour, C.
name: Sun, J. R.
name: Wang, Z. G.
name: Zhao, Y. T.
name: Xiao, G. Q.
name: Cheng, R.
name: Zhou, X. M.
name: Ren, J. R.
name: Liu, S. D.
name: Lei, Y.
name: Sun, Y. B.
name: Ritter, R.
name: Gruber, E.
name: Cassimi, A.
name: Monnet, I.
name: Bouffard, S.
name: Aumayr, F.
name: Toulemonde, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The formation of nano-hillocks on CaF2 crystal surfaces by individual ion impact has been studied using medium energy (3 and 5 MeV) highly charged ions (Xe19+ to Xe30+) as well as swift (kinetic energies between 12 and 58 MeV) heavy ions. For very slow highly charged ions the appearance of hillocks is known to be linked to a threshold in potential energy while for swift heavy ions a minimum electronic energy loss is necessary. With our results we bridge the gap between these two extreme cases and demonstrate, that with increasing energy deposition via electronic energy loss the potential energy threshold for hillock production can be substantially lowered. Surprisingly, both mechanisms of energy deposition in the target surface seem to contribute in an additive way, as demonstrated when plotting the results in a phase diagram. We show that the inelastic thermal spike model, originally developed to describe such material modifications for swift heavy ions, can be extended to case where kinetic and potential energies are deposited into the surface.
description: 12 pages, 4 figures
Dissipative Schrödinger-Poisson systems
Creators: name: Baro, Michael
name: Kaiser, Hans-Christoph
name: Neidhardt, Hagen
name: Rehberg, Joachim
Publisher: name: Weierstrass Institute
Year: 2002
Subjects: subject: dissipative Schrödinger-type operators
subject: dissipative Schrödinger-Poisson systems
subject: carrier and current densities
subject: density matrices
subject: a priori estimates
subject: 47B44
subject: 47E05
subject: 35J05

description: The paper is devoted to the dissipative Schrödinger-Poisson system. We prove that the system always admits a solution and that all solutions of a given Schrödinger-Poisson system are included in a uniform ball whose radius depends only on the data of the system.
Scale Symmetry Breaking From Total Derivative Densities and the Cosmological Constant Problem
Creators: name: Guendelman, Eduardo I.
name: Nishino, Hitoshi
name: Rajpoot, Subhash
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The use in the action integral of totally divergent densities in generally coordinate invariant theories can lead to interesting mechanisms of spontaneous symmetry breaking of scale invariance. With dependence in the action on a metric independent density $Φ$, in $4D$ , we can define $Φ=\varepsilon^{μναβ}\partial_μA_{ναβ}$ that gives a new interesting mechanism for breaking scale symmetry in 4-D theories of gravity plus matter fields, through the $A_{ναβ}$ equations of motion which lead to an integration constant the breaks the scale symmetry, while introducing terms of the form $eG ln K$ , $e$ being the determinant of the vierbein, $G$ being the Gauss Bonnet scalar and $K$ being scalar functions of the fields transforming like $K \rightarrow cK $ (where c is a constant) under a scale transformation. Such a term is invariant only up to a total divergence and therefore leads to breaking of scale invariance due to gravitational instantons. The topological density constructed out of gauge field strengths $\varepsilon^{μναβ}F^a_{μν}F^a_{αβ}$ can be coupled to the dilaton field linearly to produce a scale invariant term up to a total divergence. The scale symmetry can be broken by Yang Mills instantons which lead to a very small vacuum energy for our Universe.
description: Accepted for Publication in Physics Letters B, 15 pages
On the Karlsson-Nussbaum conjecture for resolvents of nonexpansive mappings
Creators: name: Huczek, Aleksandra
name: Wiśnicki, Andrzej
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $D\subset \mathbb{R}^{n}$ be a bounded convex domain and $F:D\rightarrow D$ a $1$-Lipschitz mapping with respect to the Hilbert metric $d$ on $D$ satisfying condition $d(sx+(1-s)y,sz+(1-s)w)\leq \max \{d(x,z),d(y,w) \}$. We show that if $F$ does not have fixed points, then the convex hull of the accumulation points (in the norm topology) of the family $\{R_{λ}\}_{λ>0}$ of resolvents of $F$ is a subset of $\partial D.$ As a consequence, we show a Wolff-Denjoy type theorem for resolvents of nonexpansive mappings acting on an ellipsoid $D$.
description: 9 pages
Exciton emission of quasi-2D InGaN in GaN matrix grown by molecular beam epitaxy
Creators: name: Ma, Dingyu
name: Rong, Xin
name: Zheng, Xiantong
name: Wang, Weiying
name: Wang, Ping
name: Schulz, Tobias
name: Albrecht, Martin
name: Metzner, Sebastian
name: Müller, Mathias
name: August, Olga
name: Bertram, Frank
name: Christen, Jürgen
name: Jin, Peng
name: Li, Mo
name: Zhang, Jian
name: Yang, Xuelin
name: Xu, Fujun
name: Qin, Zhixin
name: Ge, Weikun
name: Shen, Bo
name: Wang, Xinqiang
Publisher: name: [London] : Macmillan Publishers Limited
Year: 2017
Subjects: subject: chemical binding
subject: excitation
subject: high temperature
subject: photoluminescence
subject: 500
subject: 600

description: We investigate the emission from confined excitons in the structure of a single-monolayer-thick quasi-two-dimensional (quasi-2D) Inx Ga1-x N layer inserted in GaN matrix. This quasi-2D InGaN layer was successfully achieved by molecular beam epitaxy (MBE), and an excellent in-plane uniformity in this layer was confirmed by cathodoluminescence mapping study. The carrier dynamics have also been investigated by time-resolved and excitation-power-dependent photoluminescence, proving that the recombination occurs via confined excitons within the ultrathin quasi-2D InGaN layer even at high temperature up to ∼220 K due to the enhanced exciton binding energy. This work indicates that such structure affords an interesting opportunity for developing high-performance photonic devices.
On-Chip Detection of Entangled Photons by Scalable Integration of Single-Photon Detectors
Creators: name: Najafi, Faraz
name: Mower, Jacob
name: Harris, Nicholas
name: Bellei, Francesco
name: Dane, Andrew
name: Lee, Catherine
name: Kharel, Prashanta
name: Marsili, Francesco
name: Assefa, Solomon
name: Berggren, Karl K.
name: Englund, Dirk
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Photonic integrated circuits (PICs) have emerged as a scalable platform for complex quantum technologies using photonic and atomic systems. A central goal has been to integrate photon-resolving detectors to reduce optical losses, latency, and wiring complexity associated with off-chip detectors. Superconducting nanowire single-photon detectors (SNSPDs) are particularly attractive because of high detection efficiency, sub-50-ps timing jitter, nanosecond-scale reset time, and sensitivity from the visible to the mid-infrared spectrum. However, while single SNSPDs have been incorporated into individual waveguides, the system efficiency of multiple SNSPDs in one photonic circuit has been limited below 0.2% due to low device yield. Here we introduce a micrometer-scale flip-chip process that enables scalable integration of SNSPDs on a range of PICs. Ten low-jitter detectors were integrated on one PIC with 100% device yield. With an average system efficiency beyond 10% for multiple SNSPDs on one PIC, we demonstrate high-fidelity on-chip photon correlation measurements of non-classical light.
description: 27 pages, manuscript including supporting information
title: Reconfiguring Strategic Resources to Enhance the Performance of a Firm during Economic Uncertainty Using the Framework of the Resource-Based Theory
Creators: name: Alaloula, Walid
Publisher: name: University of Liverpool Repository
Year: 2022

description: Our research explored the reconfiguring of a firm’s strategic resources using the resource-based theory, with the goal of devising a plan of action that would enhance organizational performance in times of economic uncertainty. A seven-step plan of action was used. It started with the scoring of the firm’s performance on a balanced scorecard, followed by the identification of organizational resources and the assessment of them by the VRIO method (value, rarity, costly to imitate, organized to capture value). The intention was to reconfigure the strategic resources to generate strategic alternatives so we could choose the best one to implement. By finally testing the result with a second balanced scorecard, an action research cycle was established to target the problem of decreased performance in times of economic uncertainty. The balanced scorecard showed significant changes in the internal business and innovations and learning perspectives. The financial perspective showed marginally significant results; nevertheless, a profound improvement was noted in comparison with the financial indicators of the past five years. For the customer perspective, the results appeared to be insignificant; nevertheless, the first balanced scorecard for this feature showed substantial approval, leaving no room for a statistically significant change in the second balanced scorecard. In addition, the negative responses on the first balanced scorecard had changed to positive results on the second balanced scorecard. These results suggested that reconfiguring a firm’s strategic resources using the resource-based view generated strategic alternatives and assisted the firm in enhancing its performance during a time of economic uncertainty. On the other hand, and reflecting on the relational element between theory and practice in terms of informing future actions, our findings suggests that turning knowledge into action is possible, nonetheless environmentally related. Being environmentally related requires from the firm to continuously adapt. Adaptation is not a spontaneous or arbitrary decision; adaption must be induced. With the continues activation of cycles of action and reflection a firm may adapt, and knowledge can be transferred into action. It is the delicate balance between theory, action, cycles of reflection, and firm adaptation that allows an action researcher to achieve actionable knowledge.
Stabilizing silica nanoparticles in hydrogels: impact on storage and polydispersity
Creators: name: Giovannini, Giorgia
name: Kunc, Filip
name: Piras, Carmen C.
name: Stranik, Ondrej
name: Edwards, Alison A.
name: Hall, Andrew J.
name: Gubala, Vladimir
Publisher: name: London : RSC Publishing
Year: 2017
Subjects: subject: Colloidal Stability
subject: Drug delivery system
subject: Hematopoietic cell line
subject: Important features
subject: Long-term storage
subject: Mono-disperse particles
subject: Physicochemical property
subject: Silica nanoparticles
subject: 540

description: For successful nanomedicine, it is important that the unique, size-dependent physico-chemical properties of the nanomaterial remain predictably constant during both the storage and the manipulation of the material. Here a novel approach to preserve the colloidal stability and degradation of NPs is described. The concept is simple: (a) a solution of monodisperse particles is formulated into a responsive water- or PBS-based hydrogel; (b) the gel can be reversibly turned into a solution after long term storage by shaking it by hand; (c) the NP can be diluted and used in any desired application without the need for excessive manipulation. The differences between the physico-chemical properties of NPs stored in solution and in gel are compared. Two types of NPs were involved in this study: silica NPs of ∼100 nm and Au-NPs of 30 and 80 nm in diameter. The key findings are: the fibrous matrix of the hydrogel limits the NP mobility, significantly reduces NP aggregation and conserves the NP morphology; both the hydrogelator and the NPs show negligible toxicity towards the model U937 human hematopoietic cell line; undesired leaching of cargo material loaded inside the particles is reduced, which could be an important feature for drug delivery systems.
Additional file 1 of Effectiveness of corticosteroids for post-extubation stridor and extubation failure in pediatric patients: a systematic review and meta-analysis
Creators: name: Kimura, Satoshi
name: Ahn, JiYoon B.
name: Takahashi, Mai
name: Kwon, Sohee
name: Papatheodorou, Stefania
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Table S1. Summary of the characteristics of randomized controlled trials for assessment of post-extubation stridor and/or extubation failure. Table S2. Summary of the characteristics of observational studies for assessment of post-extubation stridor and/or extubation failure. Table S3. Quality assessment of observational studies. Table S4. Meta-regression analysis of post-extubation stridor and reintubation.
Spironaphthoxazine switchable dyes for biological imaging
Creators: name: Xiong, Yaoyao
name: Vargas Jentzsch, Andreas
name: Osterrieth, Johannes W. M.
name: Sezgin, Erdinc
name: Sazanovich, Igor V.
name: Reglinski, Katharina
name: Galiani, Silvia
name: Parker, Anthony W.
name: Eggeling, Christian
name: Anderson, Harry L.
Publisher: name: Cambridge : RSC Publishing
Year: 2018
Subjects: subject: Photochemical quantum yield
subject: Photochromic switches
subject: Ring-closing reactions
subject: Singlet excited state
subject: Super-resolution microscopy
subject: Synthesis and characterizations
subject: Time-resolved infrared
subject: Transient absorption spectroscopies
subject: 540

description: Recent developments in super-resolution microscopy have significantly expanded the requirements for switchable dyes, leading to demand for specially designed molecular switches. We report the synthesis and characterization of a spironaphthoxazine photochromic switch (a derivative of palatinate purple) displaying high photoconversion (85-95%) under readily accessible 405 nm light, broad absorption in the visible, and excellent fatigue resistance. The indole substituent on this spironaphthoxazine is twisted out of conjugation with the naphthalene unit, yet it is crucial for activation with visible light. The open colored merocyanine form of the spironaphthoxazine reverts to the closed form with a lifetime of 4.7 s in dichloromethane at 20 °C; this thermal reversion is even faster in more polar solvents. The photochemical quantum yields for ring-opening and ring-closing are approximately 8% and 1%, respectively, in dichloromethane. The ring-opening and ring-closing reactions have been characterized by time-resolved infrared and transient absorption spectroscopies. Ring opening occurs rapidly (τ = 2.1 ns) and efficiently (∼90%) from the singlet excited state to form an intermediate (assigned as a cisoid merocyanine), which returns to the closed ground state (τ = 4.5 ns) in competition with relaxation to the transoid open form (τ = 40 ns). Photochemical ring closing is a faster and simpler process: the excited state proceeds to the closed spirooxazine with a time constant of 0.28 ns. This photochromic switch can be used in conjunction with commercial fluorescent dyes to create a small-molecule switchable fluorescent dyad that shows high contrast and good fatigue resistance in living cells. These properties make the dyads suitable for application in RESOLFT microscopy.
Extracting Entities of Interest from Comparative Product Reviews
Creators: name: Arora, Jatin
name: Agrawal, Sumit
name: Goyal, Pawan
name: Pathak, Sayan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.7; H.3.3

description: This paper presents a deep learning based approach to extract product comparison information out of user reviews on various e-commerce websites. Any comparative product review has three major entities of information: the names of the products being compared, the user opinion (predicate) and the feature or aspect under comparison. All these informing entities are dependent on each other and bound by the rules of the language, in the review. We observe that their inter-dependencies can be captured well using LSTMs. We evaluate our system on existing manually labeled datasets and observe out-performance over the existing Semantic Role Labeling (SRL) framework popular for this task.
description: Source Code: https://github.com/jatinarora2702/Review-Information-Extraction
Frequency dependence of magnetothermal properties for magnetic fluid and magnetically functionalized implants
Creators: name: Salakhova, R.T.
name: Vylegzhanin, A. G.
name: Kashtanov, E.A.
name: Zverev, V.I.
name: Müller, R.
name: De Sena Pereira, F.D.
name: Parfenov, V.A.
name: Mironov, V.A.
name: Kritskaya, E.A.
name: Pyatakov, A.P.
name: Markov, V.K.
name: Malyshev, A.Yu
name: Kamilov, K.I
name: Tishin, A.M
Publisher: name: Les Ulis : EDP Sciences
Year: 2018
Subjects: subject: nanoparticles
subject: Konferenzschrift
subject: 530

description: Heating of the magnetic nanoparticles in AC magnetic field is the effect promising for application in medicine. The mechanisms of heating in AC-magnetic field implies nontrivial dependence of the power dissipated by magnetic nanoparticles on frequency. With the use of a reconfigurable experimental setup, this frequency-dependent magnetic heating was measured on two characteristic examples: the magnetite nanoparticles conventionally used in medicine and polymer coating with micrometer sized magnetite particles. The saturation of the heating power with frequency is shown that is more pronounced for the second case of microparticles.
Additional file 1 of Impact of COVID-19 upon changes in emergency room visits with chest pain of possible cardiac origin
Creators: name: Butt, Adeel A.
name: Kartha, Anand
name: Asaad, Nidal
name: Azad, Aftab M.
name: Bertollini, Roberto
name: Abdul-Badi Abou-Samra
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1: Table S1. Chief complaints of patients presenting to the Emergency Departments at all participating hospitals over the study period (listed alphabetically). Table S2. Cardiac symptoms. Table S3. Confirmed diagnoses for those presenting with cardiac symptoms
Temperature dependent optical properties of $\varepsilon$-Ga$_2$O$_3$ thin films
Creators: name: Makino, T.
name: Yusa, S.
name: Oka, D.
name: Fukumura, T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We determined the complex dielectric functions of $\varepsilon$-Ga$_2$O$_3$ using optical transmittance and reflectance spectroscopies at temperatures from 10 K to room temperature. The measured dielectric-function spectra reveal distinct structures at a bandgap energy. We fitted a model dielectric function based on the electronic energy-band structure to these experimental data. We analyzed the temperature dependence of the band-gap with a model based on phonon dispersion effects. One could explain it in terms of phonon-related parameters such as the optical phonon temperature. We compare phonon-related properties of $\varepsilon$-Ga$_2$O$_3$ with those of a large variety of element and binary semiconductors.
description: 10 pages, 6 png figures, using arxiv.sty
Majorana Fermions in Semiconducting Nanowires on the Top of Fulde-Ferrell Superconductor
Creators: name: Liu, Jia
name: Chan, Chun Fai
name: Gong, Ming
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The novel idea that spin-orbit coupling (SOC) and $s$-wave pairing can lead to induced $p$-wave pairing at strong magnetic limit has stimulated widespread interests in the whole community for the searching of Majorana Fermions (MFs), a self-hermitian particle, in semiconductor-superconductor hybrid structures. However, this system has several inherent limitations that prohibit the realization and identification of MFs with the major advances of semiconductor nanotechnology. We show that these limitations can be resolved by replacing the $s$-wave superconductor with type-II Fulde-Ferrell (FF) superconductor, in which the Cooper pair center-of-mass momentum plays the role of renormalizing the in-plane Zeeman field and chemical potential. As a result, the MFs can be realized for semiconductor nanowires with small Landé $g$ factor and high carrier density. The SOC strength directly influences the topological boundary, thus the topological phase transition and associated MFs can be engineered by an external electric field. Almost all the semiconductor nanowires can be used to realize MFs in this new platform. In particular, we find that InP nanowire, in some aspects, is more suitable for the realization of MFs than InAs and InSb nanowires. This new platform therefore can integrate the advances of semiconductor nanotechnology to the realization and identification of MFs in this hybrid structure.
description: 6 pages, 4 figures, 1 table. Comments are welcome
Robustness of Light-Transport Processes to Bending Deformations in Graded-Index Multimode Waveguides
Creators: name: Boonzajer Flaes, Dirk E.
name: Stopka, Jan
name: Turtaev, Sergey
name: De Boer, Johannes F.
name: Tyc, Tomáš
name: Čižmár, Tomáš
Publisher: name: College Park, Md. : APS
Year: 2018
Subjects: subject: Computational challenges
subject: Endoscopic applications
subject: Graded-index fibers
subject: Gradient index rod lens
subject: Imaging performance
subject: Multi-mode waveguides
subject: Multimode optical waveguides
subject: Refractive index profiles
subject: 550
subject: 530

description: Light transport through a multimode optical waveguide undergoes changes when subjected to bending deformations. We show that optical waveguides with a perfectly parabolic refractive index profile are almost immune to bending, conserving the structure of propagation-invariant modes. Moreover, we show that changes to the transmission matrix of parabolic-index fibers due to bending can be expressed with only two free parameters, regardless of how complex a particular deformation is. We provide detailed analysis of experimentally measured transmission matrices of a commercially available graded-index fiber as well as a gradient-index rod lens featuring a very faithful parabolic refractive index profile. Although parabolic-index fibers with a sufficiently precise refractive index profile are not within our reach, we show that imaging performance with standard commercially available graded-index fibers is significantly less influenced by bending deformations than step-index types under the same conditions. Our work thus predicts that the availability of ultraprecise parabolic-index fibers will make endoscopic applications with flexible probes feasible and free from extremely elaborate computational challenges.
Vector Quarks in the Higgs Triplet Model
Creators: name: Bahrami, Sahar
name: Frank, Mariana
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the effects of introducing vector fermions in the Higgs Triplet Model. In this scenario, the model contains, in addition to the Standard Model particle content, one triplet Higgs representation, and a variety of vector-like fermion states, including singlet, doublet, and triplet states. We investigate the electroweak precision variables and impose restrictions on model parameters. We show that, for some representations, introducing vector quarks significantly alters the constraints on the mass of the doubly charged Higgs boson, bringing it in closer agreement with experimental constraints. We also study the effects of introducing the vector-like fermions on neutral Higgs phenomenology, in particular on the loop-dominated decays H -> gamma gamma and H -> Z gamma, and the restrictions they impose on the parameter space.
description: 33 pages, 7 figures
Additional file 1 of The influence of urban park characteristics on bird diversity in Nanjing, China
Creators: name: Xueru Yang
name: Xinwei Tan
name: Chuanwu Chen
name: Wang, Yanping
Publisher: name: figshare
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Descriptions of habitat structural feature. Table S2. Pearson correlation matrix for predictor variables in 37 urban parks in Nanjing, China. Table S3. Results of model selection relating bird species richness to predictor variables using corrected Akaike information criterion (AICc).
Silicon Powder-Based Wafers for Low-Cost Photovoltaics: Laser Treatments and Nanowire Etching
Creators: name: Jia, G.
name: Plentz, J.
name: Gawlik, A.
name: Azar, A.S.
name: Stokkan, G.
name: Syvertsen, M.
name: Carvalho, P.A.
name: Dellith, J.
name: Dellith, A.
name: Andrä, G.
name: Ulyashin, A.
Publisher: name: New York, NY [u.a.] : Hindawi Publ. Corp.
Year: 2018
Subjects: subject: High quality
subject: Laser treated
subject: Laser treatment
subject: Low-cost photovoltaics
subject: Polycrystalline-Si
subject: Powder-based
subject: Si layer
subject: Si wafer
subject: Silicon powders
subject: Wire-sawing
subject: 540
subject: 660

description: In this study, laser-treated polycrystalline Si (pc-Si) wafers, fabricated by wire sawing of hot-pressed ingots sintered from Si powder, have been investigated. As-cut wafers and those with high-quality thin Si layers deposited on top of them by e-beam have been subjected to laser irradiation to clarify typical trends of structural modifications caused by laser treatments. Moreover, possibility to use laser-treated Si powder-based substrates for fabrication of advanced Si structures has been analysed. It is established that (i) Si powder-based wafers with thicknesses 180 μm can be fully (from the front to back side) or partly (subsurface region) remelted by a diode laser and grain sizes in laser-treated regions can be increased; (ii) a high-quality top layer can be fabricated by crystallization of an additional a-Si layer deposited by e-beam evaporation on top of the pc-Si; and (iii) silicon nanowires can be formed by metal-assisted wet chemical etching (MAWCE) of polished Si powder-based wafers and as-cut wafers irradiated with medium laser power, while a surface texturing on the as-cut pc-Si wafers occur, and no nanowires can form in the region subject to a liquid phase crystallization (LPC) caused by high-power laser treatments.
Prävention der Suizidalität bei Kindern und Jugendlichen in der Schule
Creators: name: Ziegler, Angela
Publisher: name: Zenodo
Year: 2022
Subjects: Sonderpädagogik
Masterarbeit
Prävention
Suizidalität

description: Diese Masterarbeit befasst sich mit der Prävention von Suizidalität bei Kindern und Jugendlichen. Die Arbeit verschafft einen Überblick zu den Alarmzeichen und Risikofaktoren eines Suizids bei Kindern und Jugendlichen sowie zu den Präventionsprogrammen in der Schweiz. Mittels einer qualitativen Inhaltsanalyse von ausgewählten Studien und Buchkapiteln sowie einer qualitativen Befragung dreier Fachpersonen wurden die Fragestellungen beantwortet und die Ergebnisse diskutiert. Die Masterarbeit zeigt auf, dass Suizidalität bei Kindern und Jugendlichen während der Corona-Pandemie zugenommen hat. Es wird deutlich, dass Handlungsbedarf besteht bezüglich der Sensibilisierung der Lehrpersonen und der Implementierung von Präventionsprogrammen in der Schule. Auch wird klar, wie wichtig eine umfassende Gesundheitsförderung ist.
Dependence of asymptotic decay exponents on initial condition and the resulting scaling violation
Creators: name: Bondyopadhyay, Sourish
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: There are several examples which show that the critical exponents can be dependent on initial condition of the system. In such situations, there are many systems where various issues related to the universal behavior e.g. existence of universality, splitting of universality class, scaling violation, whether the initial dependence should persist even after sufficiently long time or is a transient effect, the reasons for such features, etc. are not yet quite clear. In this article, with the simple example of conserved lattice gas (CLG) model, we investigate such issues and clearly show that under certain situations the asymptotic decay exponents are in fact dependent on the initial condition of the system. We show that such effect arises because of existence of two competing time scales, and identify the initial conditions which capture the universal features of the system.
description: 7 pages, 11 figures
Structure and superconducting characteristics of magnesium diboride, substitution of boron atoms by oxygen and carbon
Creators: name: Prikhna, Tetiana
name: Romaka, Vitaliy
name: Eisterer, Michael
name: Shapovalov, Andrii
name: Kozyrev, Artem
name: Grechnev, Gennadiy
name: Boutko, Viktor
name: Goldacker, Wilfried
name: Habisreuther, Tobias
name: Vakaliuk, Oleksii
name: Halbedel, Bernd
Publisher: name: London [u.a.] : Institute of Physics
Year: 2017
Subjects: subject: Ab initio modelling
subject: Boron atom
subject: Carbon substitution
subject: Ion etching
subject: Magnesium diborides
subject: Oxidized surfaces
subject: Quantitative Auger analysis
subject: Superconducting properties
subject: Konferenzschrift
subject: 530

description: An x-ray analysis of MgB2-based materials shows that they contain MgB2 and MgO phases. According to a quantitative Auger analysis (taken after removing the oxidized surface layer by Ar ion etching in the microscope chamber) the MgB2 phase contains some amount of oxygen that approximately corresponds to the composition MgB2.2-1.7O0.4-0.6. Rietveld refinement of the MgB2 phase, based on EDX data with varying B/O content, leads to the composition MgB1.68-1.8O0.2-0.32. Ab-initio modelling of boron substitution by oxygen in MgB2 (ΔH f = -150.6 meV/atom) shows that this is energetically favourable up to the composition MgB1.75O0.25 (ΔH f = -191.4 meV/atom). In contrast to carbon substitution, where very small levels of doping can dramatically affect the superconducting characteristics of the material with concomitant changes in the electron density, oxygen substitution results in very little change in the superconducting properties of MgB2. The formation of vacancies at the Mg site of both MgB2 and substituted MgB1.75O0.25 was modelled as well, but has shown that such processes are energetically disadvantageous (ΔHf of Mg0.875B2 and Mg0.75B1.75O0.25 are equal to -45.5 and -93.5 meV/atom, respectively).
title: Η επίδραση των ψυχολογικών παραγόντων στην εργασία σε βιομηχανικό περιβάλλον
title: The impact of psychological factors in an industrial environment
titleType: AlternativeTitle
Creators: name: Αποστόλου, Αλεκσάνδερ-Γιούζεφ
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2024
Subjects: Ψυχική υγεία
Ψυχολογία
Εργαζόμενοι
Εργασιακό περιβάλλον

description: Σκοπός αυτής της διπλωματικής εργασίας, είναι η ανάλυση και η αναφορά της σημαντικότητας της ψυχικής υγείας του εργαζομένου σε βιομηχανικό περιβάλλον. Με την χρήση διαφόρων δεδομένων, κυρίως μελετών, εξετάζονται οι παράγοντες της ψυχολογικής αστάθειας στον εργασιακό χώρο, αναλύοντας πως αυτοί μπορούν να επηρεάσουν τον άνθρωπο. Οι τρόποι αντιμετώπισης που χρησιμοποιεί ο ίδιος ο εργαζόμενος δίνουν ταυτοχρόνως και την πρώτη εικόνα για τον ρόλο της ψυχολογικής κατάστασης ενός στελέχους εντός μιας βιομηχανίας. Ύστερα δίνεται έμφαση στη σχέση προσωπικής και επαγγελματικής ζωής, εξετάζοντας πως αυτή η σχέση διαφέρει συγκρίνοντας πέντε διαφορετικές χώρες μεταξύ τους. Οι παράγοντες οι οποίοι συντελούν στην σύγκρουση της προσωπικής και επαγγελματικής ζωής αναφέρονται αναλυτικά, καθώς το αποτέλεσμα είναι η σημαντική επιρροή στην ψυχική υγεία των ανθρώπων. Ο ρόλος της εταιρείας στο πως διαχειρίζεται το προσωπικό, ιδιαίτερα εκείνο το οποίο αντιμετωπίζει δυσκολίες, είναι ένα σκέλος το οποίο τονίζει πως η ψυχική υγεία του εργαζομένου δεν έχει μονόπλευρη ευθύνη. Συγκεκριμένα, αναλύεται η ποικιλία τρόπων αντιμετώπισης που μπορεί να έχει μια εταιρεία, για να υποστηρίξει το εργατικό δυναμικό. Οι μέθοδοι που χρησιμοποιούνται, έχουν αποτελέσματα τόσο στην παραγωγικότητα όσο και στην σχέση μεταξύ εργαζομένων και αυτό φαίνεται ιδιαίτερα με την χρήση των προγραμμάτων στήριξης που παρέχονται. Οι πόροι που προσφέρει η βιομηχανία στους εργαζόμενους της αλλά και η στάση των άμεσων προϊστάμενων στους υπαλλήλους έχουν άμεση σχέση με την ψυχική κατάσταση τους αλλά και με το συνολικό εργασιακό περιβάλλον. Για να υπάρξει και μια πιο πρόσφατη εικόνα στο κομμάτι της ψυχικής υγείας ενός εργαζομένου στην Ελλάδα, διεξάχθηκε ένα μικρό ερωτηματολόγιο των 14 ερωτήσεων, στο οποίο συμμετείχαν 80 άτομα από διάφορους εργασιακούς κλάδους, με σκοπό την γενική εικόνα που επικρατεί σε διαφορετικές βιομηχανίες και την οπτική υπαλλήλων ανεξαρτήτου θέσης. Στο τελικό μέρος της διπλωματικής εργασίας, αναγράφονται λύσεις των προβλημάτων που εμφανίζονται όπως και προτάσεις βελτίωσης υπάρχοντών συστημάτων.
Dualité et principe local-global pour les tores sur une courbe au-dessus de C((t))
Creators: name: Colliot-Thélène, Jean-Louis
name: Harari, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11E72, 12G05, 14G05, 14G27

description: Pour $K$ un corps global (corps de nombres ou corps de fonctions d'une variable sur un corps fini $F$), on dispose de théorèmes de dualité classiques (Tate, Poitou, Nakayama) pour la cohomologie galoisienne à valeurs dans des tores et des modules abéliens finis. Nous établissons de tels théorèmes pour $K$ le corps des fonctions d'une courbe projective et lisse sur le corps $F={\bf C}((t))$ des séries formelles en une variable sur le corps des complexes. Cela permet de contrôler le défaut du principe de Hasse et l'approximation faible pour les espaces homogènes sous un tore. Il y a ici des différences avec le cas classique ($K$ corps global), et aussi avec le cas récemment étudié où $K$ est un corps de fonctions d'une variable sur un corps $p$-adique. Par exemple, la $K$-rationalité d'un tore n'implique pas ici la validité du principe de Hasse pour ses espaces principaux homogènes. ---------------- Over a global field $K$ (number field, or function field of a curve over a finite field $F$), arithmetic duality theorems for the Galois cohomology of tori and finite Galois modules have long been known. More recent work investigates the case where $K$ is the function fields of of a curve over a $p$-adic field. For $K$ the function field of a curve over the formal series field $F={\bf C}((t))$, we establish analogous duality theorems. We thus control the obstruction to the local-global principle and to weak approximation for homogeneous spaces of tori. There are differences with the afore described cases. For example the Hasse principle need not hold for principal homogeneous spaces of a $K$-rational torus.
description: 60 pages, in French
مهارة تركيز الانتباه وعلاقتها بمستوى الأداء البدني والتقني لدى لاعبي كرة الهدف للمعاقين Attention focus and its relationship to the level of physical and technical performance of goalball players for the disabled (class B1)
Creators: name: نواجي, دليلة
name: دخية, عادل
name: جمالي, مرابط
Publisher: name: Zenodo
Year: 2023
Subjects: focus of attention, physical and technical performance, goal ball players, class B1

description: The study aims to identify the relationship between attentional focus and the physical and technical performance levels of goalball players with disabilities. Our research problem was: Is there a relationship between attentional focus and physical and technical performance levels of goalball players? We assumed that there is a relationship between attentional focus and physical performance levels of goalball players, as well as a relationship between attentional focus and technical performance levels of goalball players. To achieve this purpose, we used a descriptive method on a sample of 12 players who were purposively selected. To collect the data, we used an attentional focus scale, as well as physical and technical tests for goalball players. After collecting and processing the data statistically, we found that there is a strong correlation between attentional focus level and the distinguished arm speed test in physical performance, as well as between attentional focus and the shooting skill through divisions in technical performance. Based on these findings, the study recommends conducting similar research on other levels and for coaches to focus on the physical and technical aspects of training, as well as other aspects that serve such studies.
Meshfree Note - Radial Basis Function - Point Interpolation Method (RBF-PIM)
Creators: name: A. R. Zainal Abidin
Publisher: name: Zenodo
Year: 2023
Subjects: meshfree method, interpolation, curve fitting, numerical method

description: The radial basis function (RBF), also known as the Radial Point Interpolation Method (RPIM), is a meshfree method used to construct an interpolated function to fit a curve. It uses a set of radial basis functions to interpolate between nodal values, with at least four types of different RBFs used in the literature. The RPIM has no guarantee on the reproduction of polynomial functions since most RBFs use a "radial-basis-power-law" to fit the curve. However, the RBF's shape parameters can be used to control the smoothness of the fitted curve. To establish the RPIM formulation, we begin with a representation of a curve function in a 1D system using RBF, with a numerical example of five nodal values given to be fitted. By solving for the unknowns, we can obtain a general fitted function that yields a continuous interpolated function along x based on given nodal values at specified locations. The RPIM has the ability to fit the curve exactly, passing through all the given nodes. The implementation codes for the RPIM are provided in the article, including MATLAB codes that allow us to try any number of given curve nodes, change the parameters' value, and observe the performance of the RPIM in fitting the curve. In summary, the RPIM is a useful method for fitting curves based on a set of nodal values using RBFs. Its flexibility and ability to fit the curve exactly make it a popular choice in many applications. However, it's important to be aware of the limitations of RBFs and their use in the RPIM. The shape parameters used to control the smoothness of the fitted curve and the type of RBFs used can significantly affect the general performance of the RPIM in fitting the curve.
Intrinsic physical properties and Doppler boosting effects in LSI+61303
Creators: name: Massi, M.
name: Torricelli-Ciamponi, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Our aim is to show how variable Doppler boosting of an intrinsically variable jet can explain the long-term modulation of 1667 \pm 8 days observed in the radio emission of LSI+61303. The physical scenario is that of a conical, magnetized plasma jet having a periodical (P1) increase of relativistic particles, Nrel, at a specific orbital phase, as predicted by accretion in the eccentric orbit of LSI+61303. Jet precession (P2) changes the angle, eta, between jet axis and line of sight, thereby inducing variable Doppler boosting. The problem is defined in spherical geometry, and the optical depth through the precessing jet is calculated by taking into account that the plasma is stratified along the jet axis. The synchrotron emission of such a jet was calculated and we fitted the resulting flux density Smodel(t) to the observed flux density obtained during a 6.5-year monitoring of LSI+61303 by the Green Bank radio interferometer. Our physical model for the system LSI+61303 is not only able to reproduce the long-term modulation in the radio emission, but it also reproduces all the other observed characteristics of the radio source, the orbital modulation of the outbursts, their orbital phase shift, and their spectral index properties. Moreover, a correspondence seems to exist between variations in the ejection angle induced by precession and the rapid rotation in position angle observed in VLBA images. We conclude that the peak of the long-term modulation occurs when the jet electron density is around its maximum and the approaching jet is forming the smallest possible angle with the line of sight. This coincidence of maximum number of emitting particles and maximum Doppler boosting of their emission occurs every 1667 days and creates the long-term modulation observed in LSI+61303.
description: 12 pages, 8 figures, accepted for publication in A&A
The spin-flip scattering effect in the spin transport in silicon doped with bismuth
Creators: name: Ezhevskii, A.A.
name: Detochenko, A.P.
name: Soukhorukov, A.V.
name: Guseinov, D.V.
name: Kudrin, A.V.
name: Abrosimov, N.V.
name: Riemann, H.
Publisher: name: Bristol : IOP Publ.
Year: 2017
Subjects: subject: Concentration ranges
subject: Conduction electrons
subject: External magnetic field
subject: Hall effect measurement
subject: Silicon samples
subject: Spin transport
subject: Spin-flip scattering
subject: Strong magnetic fields
subject: Konferenzschrift
subject: 530

description: Spin transport of conduction electrons in silicon samples doped with bismuth in the 1.1•1013 - 7.7•1015 cm-3 concentration range was studied by the Hall effect measurements. The dependence of the Hall voltage magnitude on the magnetic field is the sum of the normal and spin Hall effects. The electrons are partially polarized by an external magnetic field and are scattered by the bismuth spin-orbit potential. Spin-flip scattering results in the additional electromotive force which compensates the normal Hall effect in strong magnetic fields.
Influence of system size on the properties of a fluid adsorbed in a nanopore: Physical manifestations and methodological consequences
Creators: name: Puibasset, Joël
name: Kierlik, Edouard
name: Tarjus, Gilles
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the theoretical description of a fluid adsorbed in a nanopore. Hysteresis and discontinuities in the isotherms in general hampers the determination of equilibrium thermodynamic properties, even in computer simulations. A proposed way around this has been to consider both a reservoir of small size and a pore of small extent in order to restrict the fluctuations of density and approach a classical van der Waals loop. We assess this suggestion by thoroughly studying through density functional theory and Monte Carlo simulations the influence of system size on the equilibrium configurations of the adsorbed fluid and on the resulting isotherms. We stress the importance of pore-symmetry-breaking states that even for modest pore sizes lead to discontinuous isotherms and we discuss the physical relevance of these states and the methodological consequences for computing thermodynamic quantities.
description: 16 pages, 8 figures