cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Introduction to Clifford's Geometric Algebra
Creators: name: Hitzer, Eckhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 15A66, 11E88

description: Geometric algebra was initiated by W.K. Clifford over 130 years ago. It unifies all branches of physics, and has found rich applications in robotics, signal processing, ray tracing, virtual reality, computer vision, vector field processing, tracking, geographic information systems and neural computing. This tutorial explains the basics of geometric algebra, with concrete examples of the plane, of 3D space, of spacetime, and the popular conformal model. Geometric algebras are ideal to represent geometric transformations in the general framework of Clifford groups (also called versor or Lipschitz groups). Geometric (algebra based) calculus allows, e.g., to optimize learning algorithms of Clifford neurons, etc. Keywords: Hypercomplex algebra, hypercomplex analysis, geometry, science, engineering.
description: 11 pages
A Consistent Theory of Kinetic Mixing and the Higgs Low-Energy Theorem
Creators: name: Bauer, Martin
name: Foldenauer, Patrick
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Extensions of the Standard Model of particle physics with new Abelian gauge groups allow for kinetic mixing between the new gauge bosons and the hypercharge gauge boson, resulting in mixing with the photon. In many models the mixing with the hypercharge gauge boson captures only part of the kinetic mixing term with the photon, since the new gauge bosons can also mix with the neutral component of the $SU(2)_L$ gauge bosons. We take these contributions into account and present a consistent description of kinetic mixing for general Abelian gauge groups both in the electroweak symmetric and the broken phase. We identify an effective operator that captures the kinetic mixing with $SU(2)_L$ and demonstrate how renormalisable contributions arise if the charged fields only obtain their masses from electroweak symmetry breaking. For the first time, a low-energy theorem for the couplings of novel Abelian gauge bosons with the Standard Model Higgs boson is derived from the one-loop kinetic mixing amplitudes.
description: 6 pages, 1 figure; v2: matches published version in Phys. Rev. Lett., minor typos corrected
СПОСІБ УРАХУВАННЯ ДИНАМІКИ ФОРМУВАННЯ СЦЕНАРІЇВ ТЕСТУВАННЯ УРАЗЛИВОСТЕЙ МОБІЛЬНИХ ПРОГРАМНИХ ЗАСТОСУНКІВ
Creators: name: Vasyl Tsurkan
name: Mykhailo Antonishyn
Publisher: name: Zenodo
Year: 2023

description: Анотація. Розглянуто формування сценаріїв тестування уразливостей мобільних програмних застосунків. Продемонстровано упорядкування послідовності кейсів вершинами графа залежностей. Виокремлено обмеженість його застосування за необхідності додавання або видалення нових етапів тестування. Дане обмеження подолано розширенням графу залежностей складником діяльності та інтерпретованого його як динамічний. Використання такого способу дозволило врахувати динаміку формування та відображати сформовані сценарії снепшотами. 
Abstract. The formation of vulnerability testing scenarios for mobile applications has been considered. The ordering of the sequence of test cases by graph vertices in the dependency graph has been demonstrated. The limitation of its application has been identified in cases where the addition or removal of new testing stages is required. This limitation has been overcome by expanding the dependency graph with an activity component and interpreting it as dynamic. The use of this approach allows for the consideration of the dynamics of formation and the representation of formed scenarios through snapshots
Shearing radiative collapse with expansion and acceleration
Creators: name: Thirukkanesh, S.
name: Rajah, S. S.
name: Maharaj, S. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the behaviour of a relativistic spherically symmetric radiative star with an accelerating, expanding and shearing interior matter distribution in the presence of anisotropic pressures. The junction condition can be written in standard form in three cases: linear, Bernoulli and Riccati equations. We can integrate the boundary condition in each case and three classes of new solutions are generated. For particular choices of the metric we investigate the physical properties and consider the limiting behaviour for large values of time. The causal temperature can also be found explicitly.
description: 16 pages, To appear in J. Math. Phys
Holography and matter creation revisited
Creators: name: Cárdenas, V. H.
name: Cruz, Miguel
name: Lepe, Samuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The consideration of the holographic dark energy approach and matter creation effects in a single cosmological model is carried out in this work accordingly, we discuss some cases of interest. We test this cosmological proposal against recent observations. Considering the best fit values obtained for the free cosmological parameters, the model exhibits a transition from a decelerated cosmic expansion to an accelerated one. The deceleration-acceleration transition can not be determined consistently from the coincidence parameter for this kind of model. At effective level the parameter state associated to the whole energy density contribution describes a quintessence scenario in the fluid analogy at present time.
description: 9 pages, 7 figures. Accepted for publication in Physics of the Dark Universe
Turning Social Workers into Web Conferencing Technical Experts via an Intensive Online Institute: The Institute on Technical Skills for Online Event Production -- #NSWM
Creators: name: Folk, Krystal
name: Marquart, Matthea S.
name: Chung, Rebecca Yae-Eun
name: Garay, Kristin
Publisher: name: Columbia University
Year: 2021
Subjects: Web-based instruction
Distance education
Social work education
Universities and colleges--Faculty--Training of

description: These are our slides for a pre-recorded poster presentation for the Network for Social Work Management Forward Thinking Summit, June 9, 2021. Link to the Summit website: https://socialworkmanager.org/nswm-forward-thinking-summit/ Poster abstract: Columbia University School of Social Work’s (CSSW) three-week Institute on Technical Skills for Online Event Production prepares social work professionals to become excellent managers of the web conferencing technology for interactive and engaging live online classes and events. 111 participants have passed in the first eight cohorts, and they have worked on hundreds of live online class sessions and online events every semester. This session will share the details of this innovative training institute and the impact on talent management. Link to the poster recording: https://youtu.be/32lmxUs0biU
Wild Networks: Exposure of 5G Network Infrastructures to Adversarial Examples
Creators: name: Apruzzese, Giovanni
name: Vladimirov, Rodion
name: Tastemirova, Aliya
name: Laskov, Pavel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Fifth Generation (5G) networks must support billions of heterogeneous devices while guaranteeing optimal Quality of Service (QoS). Such requirements are impossible to meet with human effort alone, and Machine Learning (ML) represents a core asset in 5G. ML, however, is known to be vulnerable to adversarial examples; moreover, as our paper will show, the 5G context is exposed to a yet another type of adversarial ML attacks that cannot be formalized with existing threat models. Proactive assessment of such risks is also challenging due to the lack of ML-powered 5G equipment available for adversarial ML research. To tackle these problems, we propose a novel adversarial ML threat model that is particularly suited to 5G scenarios, and is agnostic to the precise function solved by ML. In contrast to existing ML threat models, our attacks do not require any compromise of the target 5G system while still being viable due to the QoS guarantees and the open nature of 5G networks. Furthermore, we propose an original framework for realistic ML security assessments based on public data. We proactively evaluate our threat model on 6 applications of ML envisioned in 5G. Our attacks affect both the training and the inference stages, can degrade the performance of state-of-the-art ML systems, and have a lower entry barrier than previous attacks.
Экстракт коры лиственницы даурской (танины) в рационе молочных коров
Creators: name: Фомичев Ю.П.
name: Кузнецова В.А.
Publisher: name: Эффективное животноводство
Year: 2023
Subjects: молочные коровы
энергопротеиновый корм
танины
молочная продуктивность
dairy cows
energy protein feed
tannins
milk productivity

description: С целью повышения переваримости и использования питательных веществ кормов коровам опытной группе в рацион добавляли энергопротеиновый концентрат с танином. В результате у них среднесуточный удой в течение 3-месяцев лактации после отела был выше на 11,5, 24,6 и 20,0% при более высоком содержании жира и белка в молоке по отношению к контрольной группе.
description: In order to increase the digestibility and use of feed nutrients, the cows of the experimental group were supplemented with an energy protein concentrate with tannin in the diet. As a result, their average daily milk yield during 3 months of lactation after calving was higher by 11.5, 24.6 and 20.0% with a higher fat and protein content in milk compared to the control group.
On the optimal calculation of the pair correlation function for an orthorombic system
Creators: name: Röhrig, Kai A. F.
name: Kühne, Thomas D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a new computational method to calculate arbitrary pair correlation functions of an orthorombic system in the most efficient way. The algorithm is demonstrated by the calculation of the radial distribution function of shock compressed liquid hydrogen.
Genome-wide organization of eukaryotic pre-initiation complex is influenced by nonconsensus protein-DNA binding
Creators: name: Afek, Ariel
name: Lukatsky, David B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Genome-wide binding preferences of the key components of eukaryotic pre-initiation complex (PIC) have been recently measured with high resolution in Saccharomyces cerevisiae by Rhee and Pugh (Nature (2012) 483:295-301). Yet the rules determining the PIC binding specificity remain poorly understood. In this study we show that nonconsensus protein-DNA binding significantly influences PIC binding preferences. We estimate that such nonconsensus binding contribute statistically at least 2-3 kcal/mol (on average) of additional attractive free energy per protein, per core promoter region. The predicted attractive effect is particularly strong at repeated poly(dA:dT) and poly(dC:dG) tracts. Overall, the computed free energy landscape of nonconsensus protein-DNA binding shows strong correlation with the measured genome-wide PIC occupancy. Remarkably, statistical PIC binding preferences to both TFIID-dominated and SAGA-dominated genes correlate with the nonconsensus free energy landscape, yet these two groups of genes are distinguishable based on the average free energy profiles. We suggest that the predicted nonconsensus binding mechanism provides a genome-wide background for specific promoter elements, such as transcription factor binding sites, TATA-like elements, and specific binding of the PIC components to nucleosomes. We also show that nonconsensus binding influences transcriptional frequency genome-wide.
Dr TIM: Ray-tracer TIM, with additional specialist scientific capabilities
Creators: name: Oxburgh, Stephen
name: Tyc, Tomas
name: Courtial, Johannes
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics Education (physics.ed-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We describe several extensions to TIM, a raytracing program for ray-optics research. These include relativistic raytracing; simulation of the external appearance of Eaton lenses, Luneburg lenses and generalized focusing gradient-index (GGRIN) lenses, which are types of perfect imaging devices; raytracing through interfaces between spaces with different optical metrics; and refraction with generalised confocal lenslet arrays, which are particularly versatile METATOYs.
description: 12 pages, 16 figures
title: Radio Frequency Toolbox for Drone Detection and Classification
Creators: name: Bello, Abdulkabir
Publisher: name: Old Dominion University Libraries
Year: 2019

description: The continuous development of inexpensive embedded sensors has led to the rapid proliferation of new civilian use of unmanned aerial vehicle (UAVs) or drones. It is now easier for civilians to own drones as the cost falls. As we all know drones have a variety of important applications and can also be used for negative effects too. These drones can pose a threat to the security of the population either civilian, organization or industry. There is a need for Radio Frequency Signal Classification (RF-Class) toolbox which can monitor, detect, and classify RF signals from drone communication system. The ability to accurately classify over-the-air radio signals will provide insights into spectrum utilization, device fingerprinting and protocol identification. These insights can help the Warfighter to constantly be informed about adversaries transmitters capabilities without their knowledge. The advantage of the drone detection and classification toolbox is extracting information about transmitters and providing receivers information about transmitted signals. The classification of RF signals will be done based on the modulation scheme, in this case, orthogonal frequency division multiplexing (OFDM). The signal energy and features from the signals leveraging its orthogonal frequency division multiplexing (OFDM) parameter information will be used to classify the signal. This classification will be done using the capabilities of machine learning to train and test the information collected. The content of this thesis discusses how drone detection and classification can be achieved using software defined radio. GNU radio and other hardware components will be used to implement a simulation of the module.
Dataset on zooarchaeological records obtained from the Oa Street, Tartu (Estonia), excavations in 2021
Creators: name: Ehrlich, Freydis
name: Lõugas, Lembi
Publisher: name: University of Tartu; Tallinn University
Year: 2022
Subjects: zooarchaeology
Middle Ages
Early Modern Period
Estonia
Tartu

description: The dataset contains animal bone identifications carried out by Freydis Ehrlich and Lembi Lõugas in 2021-2022. The bones come from the archaeological excavations conducted in Oa Street, Tartu, in 2021. The material is dated to the 13th till the 20th centuries. When using this dataset, please cite as follows: Ehrlich, F., Lõugas, L. 2022. Dataset on zooarchaeological records obtained from the Oa Street, Tartu (Estonia), excavations in 2021. UT DataDOI online repository. Available at: DOI link.
On the effective operators for Dark Matter annihilations
Creators: name: De Simone, Andrea
name: Monin, Alexander
name: Thamm, Andrea
name: Urbano, Alfredo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider effective operators describing Dark Matter (DM) interactions with Standard Model fermions. In the non-relativistic limit of the DM field, the operators can be organized according to their mass dimension and their velocity behaviour, i.e. whether they describe s- or p-wave annihilations. The analysis is carried out for self-conjugate DM (real scalar or Majorana fermion). In this case, the helicity suppression at work in the annihilation into fermions is lifted by electroweak bremsstrahlung. We construct and study all dimension-8 operators encoding such an effect. These results are of interest in indirect DM searches.
description: 17 pages, 4 figures
title: Design, Implementation, and Analysis of Electrical System Architecture for CubeSat to Ground Communications
Creators: name: Cappiello, Anthony G.
Publisher: name: Old Dominion University Libraries
Year: 2019

description: CubeSats facilitate a low barrier to entry in University and Industrial space research. With the rapid, low-cost development of CubeSats, the need for a reliable and ro- bust communications subsystem becomes evident to ensure mission accomplishment. With the advent of Software Defined Radio, Old Dominion University is compelled to upgrade the rigid Legacy Hardware systems in place with inexpensive and flexible Software Defined Radio Solutions. Currently, Old Dominion University is on the cusp of conducting its first space science mission as a member organization of the Virginia Space Grant Consortium Cubesat Constellation and is manifest for launch on April 17, 2019 NASA Wallops Flight Facility. To conduct this mission, the design and construction of a 1U Nano-Satellite and the upgrade to existing ground station architecture was necessary. To relay data in a point-to-point fashion as required by the Science Mission, Old Dominion University has developed custom ground station hardware and software to communicate with its own satellite and the satellites of others. This thesis presents the salient design aspects in implementing a complete electrical system architecture for a 1U spacecraft and the upgrades required in the Ground Station Architecture to support the required demodulation and decoding of a 9600 baud GMSK signal from a model of the deployed satellite necessary to conduct a true science research mission as part of a University Satellite Constellation. The demodulating signal processing steps are designed in GNU Radio Companion and deals with parts of the AX.25 data link layer protocol. Additionally, analysis shall be presented to highlight the design choices made for both the spacecraft and the ground station and will demonstrate various system parameters and characteristics of interest based on the Orbital Simulation results obtained from Systems Toolkit (STK). Finally, results of the architecture design shall be reported on the system by measuring Communications Link Performance benchmarks such as Bit-Error-Rates (BER) and Signal-To-Noise Ratios (SNR).
Перспективы развития государственной ветеринарной службы России
Creators: name: Юшкова Л.Я.
Publisher: name: Эффективное животноводство
Year: 2023
Subjects: ветеринарная служба
структура
компартментализация
нагрузка
льготы
Veterinary service
structure
compartmentalization
load
benefits

description: В статье доказана необходимость совершенствования организационно – структурного построения ветеринарной службы, разработана научно обоснованная система по совершенствованию и повышению эффективности профилактики болезней и лечению больных животных в условиях рыночной экономики. Теоретически обоснована и практически доказана хозяйственная полезность и экономическая эффективность новых форм организации ветеринарного обслуживания животноводства.
description: The article proves the necessity of improving the organizational structure of the veterinary service, develops a scientifically justified system to improve and increase the effectiveness of disease prevention and treatment of sick animals in a market economy. The economic usefulness and economic efficiency of new forms of organization of veterinary service of animal husbandry was theoretically substantiated and practically proved.
The tight knot spectrum in QCD
Creators: name: Buniy, Roman V.
name: Cantarella, Jason
name: Kephart, Thomas W.
name: Rawdon, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We model the observed $J^{++}$ mesonic mass spectrum in terms of energies for tightly knotted and linked chromoelectric QCD flux tubes. The data is fit with one and two parameter models. We predict a possible new state at approximately 1190 MeV and a plethora of new states above 1690 MeV.
description: 30 pages, 17 figures, 7 tables
Secure Communication Via an Untrusted Non-Regenerative Relay in Fading Channels
Creators: name: Huang, Jing
name: Mukherjee, Amitav
name: Swindlehurst, A. Lee
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We investigate a relay network where the source can potentially utilize an untrusted non-regenerative relay to augment its direct transmission of a confidential message to the destination. Since the relay is untrusted, it is desirable to protect the confidential data from it while simultaneously making use of it to increase the reliability of the transmission. We first examine the secrecy outage probability (SOP) of the network assuming a single antenna relay, and calculate the exact SOP for three different schemes: direct transmission without using the relay, conventional non-regenerative relaying, and cooperative jamming by the destination. Subsequently, we conduct an asymptotic analysis of the SOPs to determine the optimal policies in different operating regimes. We then generalize to the multi-antenna relay case and investigate the impact of the number of relay antennas on the secrecy performance. Finally, we study a scenario where the relay has only a single RF chain which necessitates an antenna selection scheme, and we show that unlike the case where all antennas are used, under certain conditions the cooperative jamming scheme with antenna selection provides a diversity advantage for the receiver. Numerical results are presented to verify the theoretical predictions of the preferred transmission policies.
description: 32 pages, 8 figures, to appear in IEEE Transactions on Signal Processing
Renormalized Singles with Correlation in $GW$ Green's Function Theory for Accurate Quasiparticle Energies
Creators: name: Li, Jiachen
name: Yang, Weitao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We apply the renormalized singles with correlation (RSc) Green's function in the $GW$ approximation to calculate accurate quasiparticle (QP) energies and orbitals. The RSc Green's function includes all orders of singles contributions from the associated density functional approximation (DFA) and treats higher order contributions in a perturbative manner. The $G_{\text{RSc}}W_{\text{RSc}}$ method uses the RSc Green's function as the new starting point and calculates the screened interaction with the RSc Green's function. The $G_{\text{RSc}}W_0$ methods fixes the screened interaction at the DFA level. For the calculations of ionization potentials in the GW100 set, $G_{\text{RSc}}W_{\text{RSc}}$ significantly reduces the dependence on the starting point of DFAs used and provides accurate results with the mean absolute error (MAE) of $0.34$ eV comparable to ev$GW$. For the calculations of core-level binding energies in the CORE65 set, $G_{\text{RSc}}W_{\text{RSc}}$ slightly overestimates the results because of underscreening, but $G_{\text{RSc}}W_0$ with GGA functionals provides the optimal accuracy of $0.40$ eV MAE comparable to ev$GW_0$. We also show that $G_{\text{RSc}}W_{\text{RSc}}$ predicts accurate dipole moments of small molecules. These two methods, $G_{\text{RSc}}W_{\text{RSc}}$ and $G_{\text{RSc}}W_0$, are computationally much favorable than any flavor of self-consistent $GW$ methods. Thus, the RSc approach is promising for making $GW$ and other Green's function methods efficient and robust.
Individual differences in the efficacy of frontal tDCS to modulate response strategy performance
Creators: name: Filmer, Hannah
name: Dux, Paul
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Life Sciences
subject: Cognitive Psychology
subject: Social and Behavioral Sciences
subject: Neuroscience and Neurobiology
subject: Psychology
subject: FOS: Psychology
subject: Cognitive Neuroscience

description: Registration for a project
Tätigkeitsbericht 2022
Creators: name: Tekkaya, A. Erman
Publisher: name: TU Dortmund
Year: 2023
Subjects: subject: Tätigkeitsbericht
subject: 620
subject: 670
subject: Bericht

description: Tätigkeitsberichte / IUL, Institut für Umformtechnik und Leichtbau;22
Field-induced reentrant superconductivity in thin films of nodal superconductor
Creators: name: Hachiya, M.
name: Aoyama, K.
name: Ikeda, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Previous works on nodal d-wave superconductors have shown that a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like modulated superconducting (SC) state can be realized with no magnetic field when quasiparticles acquire an additional linear term in the wavevector in their dispersion. In the present work, stability of such a novel modulated SC state in an artificial film against an applied magnetic field is studied. As a reflection of the presence of the two different FFLO states, one close to zero field and the other at the high field end, in a single field v.s. temperature phase diagram of thin films, the conventional uniform SC state generally tends to appear as a reentrant ordered phase bounded by the normal phase in {\it lower} fields.
description: 6 figures, 9 pages
Innovation in der akademischen Suche: die Kollaboration von BASE und Open Knowledge Maps
Creators: name: Kraker, Peter
Publisher: name: Kolloquium Wissensinfrastruktur
Year: 2022

description: In den letzten Jahren haben sich die Anforderungen an akademische Such- und Discovery-Systeme erhöht. Neben dem stark steigenden Wachstum an Publikationen werden im Zeitalter von Open Science auch neue Output-Typen wie Datensätze, Software und Bilder publiziert. Es geht somit nicht nur um die Frage der Bewältigung der Menge an Publikationen, sondern auch um den Umgang mit der Vielfalt der Output-Typen. Die offene Discovery-Infrastruktur hat sich diesbezüglich zum stärksten Treiber von Innovation entwickelt. Das zentrale Motiv dieser Infrastruktur ist die Nachnutzung aufbauend auf offenen (Daten-)Schnittstellen. Dadurch ist ein reichhaltiges digitales Ökosystem von Repositorien, Archiven, Aggregatoren, Meta-Aggregatoren und spezialisierten Discovery-Services entstanden. Innovative Technologien wie Empfehlungssysteme, semantische Suche und Visualisierungen werden so erstmals für Forschende und Studierende verfügbar. In meinem Vortrag werde ich im Speziellen die erfolgreiche Zusammenarbeit zwischen der Bielefeld Academic Search Engine (BASE) und der visuellen Discovery-Plattform Open Knowledge Maps eingehen. Zunächst werde ich Open Knowledge Maps vorstellen und auf die technologischen und konzeptionellen Grundlagen der Kollaboration mit BASE eingehen. Darauf aufbauend werde ich die Zusammenarbeit im Bereich der Custom Services erklären, die den Einbau visueller Suchkomponenten in Drittsysteme ermöglicht, so wie z.B. in der EOSC-Plattform GoTriple.
description: Kolloquium Wissensinfrastruktur, Wintersemester 2022/23
The He II Post-Reionization Epoch: HST/COS Observations of the Quasar HS1700+6416
Creators: name: Syphers, David
name: Shull, J. Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The reionization epoch of singly ionized helium (He II) is believed to start at redshifts z~3.5--4 and be nearly complete by z~2.7. We explore the post-reionization epoch with far-ultraviolet spectra of the bright, high-redshift quasar HS1700+6416 taken by the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, which show strong He II (λ303.78) absorption shortward of the QSO redshift, z_QSO=2.75. We discuss these data as they probe the post-reionization history of He II and the local ionization environment around the quasar and transverse to the line of sight. We compare previous spectra taken by the Far Ultraviolet Spectroscopic Explorer to the current COS data, which have a substantially higher signal-to-noise ratio. The Gunn-Peterson trough recovers at lower redshifts, with the effective optical depth falling from τ_eff~1.8 at z~2.7 to τ_eff~0.7 at z~2.3. We see an interesting excess of flux near the He II Lyα break, which could be quasar line emission, although likely not He II Lyα. We present spectra of four possible transverse-proximity quasars, although the UV hardness data are not of sufficient quality to say if their effects are seen along the HS1700 sightline.
description: 12 pages, 9 figures, submitted to ApJ
Heavy flavor relaxation in a hadronic medium
Creators: name: Cabrera, Daniel
name: Abreu, Luciano M.
name: Llanes-Estrada, Felipe J.
name: Torres-Rincon, Juan M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Charm and bottom transport coefficients in a medium constituted of light mesons, such as is formed in the hadronic phase of Heavy Ion Collisions, are obtained within an effective field theory approach implementing heavy quark symmetry and chiral symmetry breaking. Heavy flavor propagates in the medium as $D/B$ and $D^*/B^*$ degrees of freedom, and unitarization of the lowest order heavy-light meson amplitudes is used in order to reach high temperatures. The latter accounts for dynamically generated resonances in isospin 1/2 channels, a feature that leads to a more efficient heavy flavor diffussion. We discuss the temperature and momentum dependence of the friction and diffusion coefficients in a transport approach up to temperatures of about $T\simeq 150$ MeV, and provide estimates of the charm/bottom relaxation lengths and momentum loss. Implications for heavy meson spectrum observables in Heavy Ion Collisions are discussed.
description: 4 pages, 2 figures, to appear in proceedings of the XI International Conference on Hypernuclear and Strange Particle Physics (HYP2012), Barcelona, October 1 - 5, 2012
Enhanced metrology at the critical point of a many-body Rydberg atomic system
Creators: name: Ding, Dong-Sheng
name: Liu, Zong-Kai
name: Shi, Bao-Sen
name: Guo, Guang-Can
name: Mølmer, Klaus
name: Adams, Charles S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The spectral properties of an interacting many-body system may display critical character and have potential applications in precision metrology. Here, we demonstrate such many-body enhanced metrology for microwave (MW) electric fields in a non-equilibrium Rydberg atomic gas. Near criticality the high sensitivity of Rydberg atoms to external MW electric fields, combined with many-body enhancement induces significant changes in the optical transmission. We quantify this behavior using the Fisher information. For continuous optical transmission at the critical point, the Fisher information is three orders of magnitude larger than in independent particle systems, the measured data provides an equivalent sensitivity of 49 nV/cm/$\textrm{Hz}^{1/2}$. The reported results constitute a milestone towards the application of many-body effects in precision metrology.
Timescale for equilibration of N/Z gradients in dinuclear systems
Creators: name: Brown, K.
name: Hudan, S.
name: de Souza, R. T.
name: Gauthier, J.
name: Roy, R.
name: Shetty, D. V.
name: Souliotis, G. A.
name: Yennello, S. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Equilibration of N/Z in binary breakup of an excited and transiently deformed projectile-like fragment (PLF*), produced in peripheral collisions of 64Zn + 27Al, 64Zn, 209Bi at E/A = 45 MeV, is examined. The composition of emitted light fragments (3<=Z<=6) changes with the decay angle of the PLF*. The most neutron-rich fragments observed are associated with a small rotation angle. A clear target dependence is observed with the largest initial N/Z correlated with the heavy, neutron-rich target. Using the rotation angle as a clock, we deduce that N/Z equilibration persists for times as long as 3-4 zs (1zs = 1 x 10^-21 s = 300 fm/c). The rate of N/Z equilibration is found to depend on the initial neutron gradient within the PLF*.
description: 6 pages, 4 figures
Open Access Transformation in der deutschen Universitätslandschaft - Erklärung von Unterschieden des Stands der Transformation
Creators: name: Taubert, Niels
Publisher: name: Kolloquium Wissensinfrastruktur
Year: 2022

description: Ziel des nunmehr abgeschlossenen Projekts OAUNI war es, die Unterschiede des Open-Access-Profils an deutschen Universitäten zu erklären und der Vortrag fasst die wichtigsten Ergebnisse des Projekts in drei Schritten zusammen: Erstens werden die Unterschiede im Aufgreifen von Open Access anhand der vier Typen ‚Full OA‘, ‚Hybrid OA‘, ‚Subject Repository OA‘ und ‚Institutional Repository OA‘ beschrieben und die wesentlichen Unterschiede zwischen Universitäten herausgearbeitet. Daran anschließend werden zweitens die Ergebnisse statistischer Prüfmodelle vorgestellt, mit denen der Einfluss unterschiedlicher Faktoren auf den Umfang des Open-Access-Publizierens untersucht wurde. Dazu zählen das an Universitäten vorhandene fachliche Profil, Open-Access-Infrastrukturen und -Services sowie die DEAL-Transformationsverträge. Als Ergebnis kann festgehalten werden, dass das fachliche Profil der bei weitem erklärungskräftigste Faktor ist. In Anbetracht des Aufwands, der zur Förderung von Open Access zum Teil unternommen wird, ist aber auch die geringe Bedeutung der lokal vorhandenen Infrastrukturen und Services beachtenswert. Anhand der Ergebnisse von Interviews mit 20 Open-Access-Beauftragten deutscher Universitäten wird dieser Befund drittens eingeordnet und gezeigt, dass Open-Access-Unterstützungsmaßnahmen eine Re-Definition ihrer Ziele erfahren und jenseits der Beförderungen der Open-Access-Transformation auch anderen Zielsetzungen dienen.
description: Kolloquium Wissensinfrastruktur, Wintersemester 2022/23
title: Детерминированный подход к решению задачи определения координат и угловой ориентации бортовой пеленгаторной антенны по результатам радиопеленгования радиоориентиров
Creators: name: А.Д. Виноградов – д.т.н., профессор, гл. науч. сотрудник, ВУНЦ ВВС «ВВА» (г. Воронеж) E-mail: mvvad@mail.ru Л.А. Минин – к.ф.-м.н., доцент, кафедра математической физики физического факультета, Воронежский государственный университет E-mail: mininla@mail.ru Е.Ю. Морозов – студент, факультет компьютерных наук, Воронежский государственный университет E-mail: morozov.evgeniy.95@gmail.com С.Н. Ушаков – к.ф.-м.н., преподаватель, кафедра функционального анализа и операторных уравнений математического факультета, Воронежский государственный университет E-mail: ushakowww@yandex.ru, .
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы: возможности одновременного и однозначного определения координат и угловой ориентации в про-странстве подвижного объекта путем азимутально-угломестного радиопеленгования с борта подвижного объекта радиоориенти-ров без использования вспомогательной информации от автономных навигационных датчиков и систем не исследованы.
Цель: рассмотреть задачу определения координат и угловой ориентации бортовой пеленгаторной антенны, размещенной на подвижном объекте воздушного, морского или наземного базирования, по результатам азимутально-угломестного радиопе-ленгования радиоориентиров (реперных источников радиоизлучения).
Результаты: определены аналитические соотношения, описывающие взаимосвязь азимута и угла места реперного источника радиоизлучения, измеряемые бортовым азимутально-угломестным радиопеленгатором, с параметрами пространственного положения и угловой ориентации бортовой пеленгаторной антенны.
Практическая значимость: получены соответствующие выражения для расчета координат и углов курса, тангажа и крена бортовой пеленгаторной антенны.
COGMED working memory training in children with Attention Deficit/Hyperactivity Disorder (ADHD): A feasibility study in Saudi Arabia
Creators: name: Almarzouki, Abeer F.
name: Bellato, Alessio
name: Al-Saad, Maha S.
name: Al-Jabri, Basma
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Working memory training has been proven effective for improving cognitive functioning in patients with Attention Deficit/Hyperactivity Disorder (ADHD). However, the feasibility of this type of training for children in Saudi Arabia has not been previously explored. We investigated the feasibility of implementing Cogmed Working Memory Training (CWMT) in a sample of 29 Saudi children with ADHD. We found no significant demographic or clinical differences between compliant and noncompliant children. Although compliant children were initially better at following instructions and reported better improvements in working memory and math skills compared to those who did not complete the CWMT, all children who participated in the program showed improvements in performing the CWMT tasks. Most parents found the Cogmed training feasible for their children, were satisfied and keen to continue with the program, and felt the training helped them to address their problems. Most children did not encounter any difficulties in using the software, and many families were, therefore, likely to continue using the techniques from the program. We conclude that CWMT for children with ADHD is feasible in Saudi Arabia. Larger case-controlled studies are needed to thoroughly investigate the effects of CWMT compared to other interventions in Saudi children with ADHD.
Single Layer Potentials on Surfaces with Small Lipschitz constant
Creators: name: Kozlov, V.
name: Thim, J.
name: Turesson, B. O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 45Exx

description: This paper considers to the equation [\int_{S} \frac{U(Q)}{|P-Q|^{N-1}} dS(Q) = F(P), P \in S,] where the surface S is the graph of a Lipschitz function ϕon R^N, which has a small Lipschitz constant. The integral in the left-hand side is the single layer potential corresponding to the Laplacian in R^{N+1}. Let Λ(r) be a Lipschitz constant of ϕon the ball centered at the origin with radius 2r. Our analysis is carried out in local L^p-spaces and local Sobolev spaces, where 1 < p < \infty, and results are presented in terms of Λ(r). Estimates of solutions to the equation are provided, which can be used to obtain knowledge about the behaviour of the solutions near a point on the surface. The estimates are given in terms of seminorms. Solutions are also shown to be unique if they are subject to certain growth conditions. Local estimates are provided and some applications are supplied.
title: Полуактивная система мультилатерации с синхронизацией приемных позиций по запросному сигналу
Creators: name: В.В. Кирюшкин – к.т.н., доцент, начальник кафедры,  ВУНЦ ВВС «ВВА» (г. Воронеж) E-mail: kiryushkin.vlad@mail.ru Н.С. Волков – курсант, факультет авиационного радиоэлектронного оборудования, ВУНЦ ВВС «ВВА» (г. Воронеж) E-mail: nickeloden96@mail.ru А.М. Медведев – курсант, факультет авиационного радиоэлектронного оборудования, ВУНЦ ВВС «ВВА» (г. Воронеж) E-mail: m.2012.a3435@yandex.ru, .
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы: необходимо предложить структуру полуактивной системы мультилатерации с синхронизацией при-емных позиций по запросному сигналу.
Цель: показать, что особенности обработки сигналов в этой системе позволяют реализовать алгоритм позиционирования воз-душного судна, использующий совокупность суммарно-дальномерных, разностно-дальномерных и дальномерных измерений.
Результаты: синтезирован и исследован алгоритм определения координат воздушного судна в предложенной системе наблюдения.
Практическая значимость: отмечено, что разработанный алгоритм позиционирования обеспечивает повышение точности определения плановых координат воздушного судна.
ConfIDent: Eine Informationsplattform für wissenschaftliche Veranstaltungen
Creators: name: Franken, Julian
Publisher: name: Kolloquium Wissensinfrastruktur
Year: 2022

description: Die Technische Informationsbibliothek (TIB) und der Arbeitsbereich Information Systems & Databases an der RWTH Aachen (Lehrstuhl Informatik 5) arbeiten in dem DFG-Projekt ConfIDent gemeinsam an der Entwicklung einer Serviceplattform für wissenschaftliche Veranstaltungen. Damit verfolgt ConfIDent folgende Ziele: Forschenden bei der Suche nach passenden Veranstaltungen zu unterstützen, Veranstaltungsinformationen zu archivieren, Forschende vor sogenannten "predatory conferences" zu schützen, Veranstaltungen mithilfe von DOIs eindeutig zu identifizieren und FAIRe (findable, accessible, interoperable, reusable) Veransaltungsmetadaten frei zur Verfügung zu stellen.
description: Kolloquium Wissensinfrastruktur, Wintersemester 2022/23
title: Синтез телекоммуникационной сети специального назначения с учетом воздействий внешних дестабилизирующих факторов
Creators: name: С.В. Кругликов – д.в.н., к.т.н., доцент, зам. ген. директора по научной и инновационной работе, Объединенный институт проблем информатики НАН Беларуси (Минск) E-mail: kruglikov_s@newman.bas-net.by А.Ю. Зализко – науч. сотрудник, научно-исследовательская лаборатория системных проектов научно-исследовательской части, Военная академия Республики Беларусь (Минск) E-mail: turbostok@tut.by, .
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы: современные беспроводные телекоммуникационные системы должны обеспечивать достаточно вы-сокую пропускную способность каналов передачи данных и устойчивое функционирование элементов подсистемы связи при воздействии внешних дестабилизирующих факторов.
Цель: рассмотреть методику структурно-параметрического синтеза беспроводной цифровой сети связи с пакетной коммутацией сообщений, обеспечивающей передачу видеоинформации реального масштаба времени между элементами многофункциональной информационно-управляющей системы специального назначения.
Результаты: показано, что методика синтеза сети основывается на многоуровневой адаптации к воздействию дестабилизи-рующих факторов, основной целью которой является рациональная комбинация параметров и функций сетевых элементов в тесной взаимосвязи с целенаправленным изменением структуры подсетей телекоммуникационной системы.
Практическая значимость: подтверждена эффективность указанной методики благодаря результатам проведенного имита-ционного эксперимента с использованием ранее полученной агрегативной модели беспроводной сети передачи данных с комму-тацией пакетов сообщений.
On quartics with lines of the second kind
Creators: name: Rams, Slawomir
name: Schuett, Matthias
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: Primary: 14J28, 14J25, Secondary: 14J70

description: We study the geometry of quartic surfaces in IP^3 that contain a line of the second kind over algebraically closed fields of characteristic different from 2,3. In particular, we correct Segre's claims made for the complex case in 1943.
description: 22 pages
title:  Trigeminal Neuralgia. From clinical characteristics to pathophysiological mechanisms
Creators: name: Di Stefano, Giulia
Publisher: name: Sapienza Università Editrice
Year: 2022

description: Trigeminal Neuralgia is a unique neuropathic facial pain condition, characterized by unilateral paroxysmal pain most often described as stabbing or electric shock-like, restricted to the distribution of one or more divisions of the trigeminal nerve territory and triggered by innocuous stimuli. Trigger zones are reported in virtually the totality of patients and represent the hallmark sign of Trigeminal Neuralgia. The development and application of a dedicated software allowed trigger zone overlap profiling of the extraoral and intraoral territories. The analysis of the natural history of Trigeminal Neuralgia showed that the failure of the treatment with first-line drugs (carbamazepine and oxcarbazepine), most of the times, is not due to the inefficacy of the drug, but rather to undesired effects to a level that causes interruption of treatment or a dosage reduction to an insufficient level. These results suggest the opportunity to develop a better tolerated drug.
Accretion of gas onto gap-opening planets and circumplanetary flow structure in magnetized turbulent disks
Creators: name: Uribe, Ana
name: Klahr, Hubert
name: Henning, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have performed three-dimensional magneto-hydrodynamical simulations of stellar accretion disks, using the PLUTO code, and studied the accretion of gas onto a Jupiter-mass planet and the structure of the circumplanetary gas flow after opening a gap in the disk. We compare our results with simulations of laminar, yet viscous disks with different levels of an $α$-type viscosity. In all cases, we find that the accretion flow across the surface of the Hill sphere of the planet is not spherically or azimuthally symmetric, and is predominantly restricted to the mid-plane region of the disk. Even in the turbulent case, we find no significant vertical flow of mass into the Hill sphere. The outer parts of the circumplanetary disk are shown to rotate significantly below Keplerian speed, independent of viscosity, while the circumplanetary disk density (therefore the angular momentum) increases with viscosity. For a simulation of a magnetized turbulent disk, where the global averaged alpha stress is $α_{MHD}=10^{-3}$, we find the accretion rate onto the planet to be $\dot{M}\approx 2\times10^{-6}M_{J}yr^{-1}$ for a gap surface density of $12 g cm^{-2}$. This is about a third of the accretion rate obtained in a laminar viscous simulation with equivalent $α$ parameter.
description: Accepted for publication in the Astrophysical Journal
On the local solute redistribution equation of macrosegregation, remelting and the formation of channel segregates
Creators: name: VYNNYCKY, MICHAEL
Publisher: name: University of Limerick
Year: 2022
Subjects: Mathematical sciences

description: In this paper, we reassess the local solute redistribution equation (LSRE) of macrosegregation which, since it first appeared in 1960s, has served as a cornerstone for understanding the composition variations that occur in the solidification of alloys. We highlight some anomalies in earlier literature, in particular as regards the prediction of remelting as a precursor to the formation of channel segregates (freckles, A-segregates and V-segregates) in casting processes. Also, we suggest extensions to the LSRE for situations where solute diffusion in the solid phase is not negligible, as well as when the mode of solidification is unconsolidated equiaxed dendritic, rather than columnar/consolidated equiaxed dendritic. In addition, the significance of the equation for latter-day numerical computations of macrosegregation is also discussed.