cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin-orbit interaction in GaAs wells: From one to two subbands
Creators: name: Fu, J. Y.
name: Egues, J. Carlos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the Rashba and Dresselhaus spin-orbit (SO) couplings in GaAs quantum wells in the range of well widths $w$ allowing for a transition of the electron occupancy from one to two subbands. By performing a detailed Poisson-Schrödinger self-consistent calculation, we determine all the intra- and inter-subband Rashba ($α_1$, $α_2$, $η$) and Dresselhaus ($β_1$, $β_2$, $Γ$) coupling strengths. For relatively narrow wells with only one subband occupied, our results are consistent with the data of Koralek \emph{et al.} [Nature \bfs{48}, 610 (2009)], i.e., the Rashba coupling $α_1$ is essentially independent of $w$ in contrast to the decreasing linear Dresselhaus coefficient $β_1$. When we widen the well so that the second subband can also be populated, we observe that $α_2$ decreases and $α_1$ increases, both almost linearly with $w$. Interestingly, we find that in the parameter range studied (i.e., very asymmetric wells) $α_2$ can attain zero and change its sign, while $α_1$ is always positive. In this double-occupancy regime of $w$'s, $β_1$ is mostly constant and $β_2$ decreases with $w$ (similarly to $β_1$ for the single-occupancy regime). On the other hand, the intersubband Rashba coupling strength $η$ decreases with $w$ while the intersubband Dresselhaus $Γ$ remains almost constant. We also determine the persistent-spin-helix symmetry points, at which the Rashba and the renormalized (due to cubic corrections) linear Dresselhaus couplings in each subband are equal, as a function of the well width and doping asymmetry. Our results should stimulate experiments probing SO couplings in multi-subband wells.
description: 7 pages, 3 figures; minor changes
Переход количественных признаков патриотизма в качественные на историческом уровне
Creators: name: Гурьев Евгений Павлович
Publisher: name: Наука. Общество. Оборона
Year: 2017
Subjects: ПАТРИОТИЗМ
КАЧЕСТВЕННЫЕ ПРИЗНАКИ
КОЛИЧЕСТВЕННЫЕ ПРИЗНАКИ
БОРОДИНСКОЕ СРАЖЕНИЕ
ОТЕЧЕСТВЕННАЯ ВОЙНА 1812 Г.
ПОДВИГ

description: В статье рассматривается переход количественных признаков патриотизма в качественные на примере исторического события Бородинского сражения. Анализируются ход летней кампании войны 1812 г., ход Бородинского сражения, подвиги русских солдат и офицеров, итоги сражения. Делаются выводы о переходе количества (подвигов русских воинов в сражении) в новое качество стратегическую победу в Отечественной войне 1812 г.
The smallest sets of points not determined by their X-rays
Creators: name: Alpers, Andreas
name: Larman, David G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Metric Geometry (math.MG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C99, 11H06, 11H16, 11P99

description: Let $F$ be an $n$-point set in $\mathbb{K}^d$ with $\mathbb{K}\in\{\mathbb{R},\mathbb{Z}\}$ and $d\geq 2$. A (discrete) X-ray of $F$ in direction $s$ gives the number of points of $F$ on each line parallel to $s$. We define $ψ_{\mathbb{K}^d}(m)$ as the minimum number $n$ for which there exist $m$ directions $s_1,...,s_m$ (pairwise linearly independent and spanning $\mathbb{R}^d$) such that two $n$-point sets in $\mathbb{K}^d$ exist that have the same X-rays in these directions. The bound $ψ_{\mathbb{Z}^d}(m)\leq 2^{m-1}$ has been observed many times in the literature. In this note we show $ψ_{\mathbb{K}^d}(m)=O(m^{d+1+\varepsilon})$ for $\varepsilon>0$. For the cases $\mathbb{K}^d=\mathbb{Z}^d$ and $\mathbb{K}^d=\mathbb{R}^d$, $d>2$, this represents the first upper bound on $ψ_{\mathbb{K}^d}(m)$ that is polynomial in $m$. As a corollary we derive bounds on the sizes of solutions to both the classical and two-dimensional Prouhet-Tarry-Escott problem. Additionally, we establish lower bounds on $ψ_{\mathbb{K}^d}$ that enable us to prove a strengthened version of Rényi's theorem for points in $\mathbb{Z}^2$.
title: Semantic Watermarks for Detecting Cheating in Online Database Exams
Creators: name: Brass, Stefan
name: Hinneburg, Alexander
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: SQL||Plagiarism||Online Exams||Cheating||Academic Integrity

description: Due to the COVID-19 pandemic,we were forced to conduct the exam for a database course as an online exam.An essential part of the exam was to write non-trivial SQL queries for given tasks.In order to ensure that cheating has a certain risk,we used several techniques to detect cases of plagiarism.One technique was to use a kind of ``watermarks'' invariants of the exercises that are randomly assigned to the students.Each variant is marked by small variationsthat need to be included in submitted solutions.Those markers might go through undetectedwhen a student decides to copy a solution from someone else.In this case,the student would reveal to know a ``secret''that he cannot know without the forbidden communication with another student.This can be used as a proof for plagiarisminstead of just a subjective feeling about the likelihoodof similar solutions without communication.We also used a log of SQL queries that were tried during the exam.Finally,we evaluated similarity-based techniques for SQL plagiarism detection.
title: Second Workshop on Novel Data Management Ideas on Heterogeneous (Co-)Processors (NoDMC)
Creators: name: Broneske, David
name: Habich, Dirk
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023

description: The objective of this one-day workshop is to explore the challenges and opportuni-ties of data processing on existing and future heterogeneous hardware architectures.
Machine Learning Etudes in Astrophysics: Selection Functions for Mock Cluster Catalogs
Creators: name: Hajian, Amir
name: Alvarez, Marcelo
name: Bond, J. Richard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Making mock simulated catalogs is an important component of astrophysical data analysis. Selection criteria for observed astronomical objects are often too complicated to be derived from first principles. However the existence of an observed group of objects is a well-suited problem for machine learning classification. In this paper we use one-class classifiers to learn the properties of an observed catalog of clusters of galaxies from ROSAT and to pick clusters from mock simulations that resemble the observed ROSAT catalog. We show how this method can be used to study the cross-correlations of thermal Sunya'ev-Zeldovich signals with number density maps of X-ray selected cluster catalogs. The method reduces the bias due to hand-tuning the selection function and is readily scalable to large catalogs with a high-dimensional space of astrophysical features.
description: Matches version to appear in JCAP. Discussions expanded, 2 figures added. 16 pages, 8 figures
Influence of temperature dependent shear viscosity on elliptic flow at back- and forward rapidities in ultrarelativistic heavy-ion collisions
Creators: name: Molnar, Etele
name: Holopainen, Hannu
name: Huovinen, Pasi
name: Niemi, Harri
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We explore the influence of a temperature-dependent shear viscosity over entropy density ratio $η/s$ on the azimuthal anisotropies v_2 and v_4 of hadrons at various rapidities. We find that in Au+Au collisions at full RHIC energy, $\sqrt{s_{NN}}=200$ GeV, the flow anisotropies are dominated by hadronic viscosity at all rapidities, whereas in Pb+Pb collisions at the LHC energy, $\sqrt{s_{NN}}=2760$ GeV, the flow coefficients are affected by the viscosity both in the plasma and hadronic phases at midrapidity, but the further away from midrapidity, the more dominant the hadronic viscosity is. We find that the centrality and rapidity dependence of the elliptic and quadrangular flows can help to distinguish different parametrizations of $(η/s)(T)$. We also find that at midrapidity the flow harmonics are almost independent of the decoupling criterion, but show some sensitivity to the criterion at back- and forward rapidities.
description: 22 pages, 30 figures; corresponds to the published version, Equation (7) and typos corrected
Изучение путей профилактики обострений хронических болей в шейном отделе позвоночника у курсантов образовательных учреждений вв МВД России, занимающихся единоборством
Creators: name: Шарова Людмила Васильевна
name: Шаров Аркадий Валерьевич
Publisher: name: Наука. Общество. Оборона
Year: 2017
Subjects: ЕДИНОБОРСТВА
ПРОФИЛАКТИКИ ОБОСТРЕНИЙ ХРОНИЧЕСКИХ БОЛЕЙ В ШЕЙНОМ ОТДЕЛЕ ПОЗВОНОЧНИКА
КУРСАНТЫ ОБРАЗОВАТЕЛЬНЫХ УЧРЕЖДЕНИЙ ВВ МВД

description: Травмы позвоночника шейного отдела являются наиболее распространенными у спортсменов единоборцев. Для успешной конкуренции в соревновательной деятельности курсантов мы предлагаем использовать современные экспериментально проверенные методы с использованием биоинформационных технологий в целях профилактики обострений хронических болей в шейном отделе позвоночника у курсантов образовательных учреждений ВВ МВД.
title: Workload Prediction for IoT Data Management Systems
Creators: name: Burrell, David
name: Chatziliadis, Xenofon
name: Zacharatou, Eleni Tzirita
name: Zeuch, Steffen
name: Markl, Volker
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Internet of Things||stream processing||machine learning||workload prediction

description: The Internet of Things (IoT) is an emerging technology that allows numerous devices, potentially spread over a large geographical area, to collect and collectively process data from high-speed data streams.To that end, specialized IoT data management systems (IoTDMSs) have emerged.One challenge in those systems is the collection of different metrics from devices in a central location for analysis. This analysis allows IoTDMSs to maintain an overview of the workload on different devices and to optimize their processing. However, as an IoT network comprises of many heterogeneous devices with low computation resources and limited bandwidth, collecting and sending workload metrics can cause increased latency in data processing tasks across the network.In this ongoing work, we present an approach to avoid unnecessary transmission of workload metrics by predicting CPU, memory, and network usage using machine learning (ML).Specifically, we demonstrate the performance of two ML models, linear regression and Long Short-Term Memory (LSTM) neural network, and show the features that we explored to train these models.This work is part of an ongoing research to develop a monitoring tool for our new IoTDMS named NebulaStream.
title: SportsTables: A new Corpus for Semantic Type Detection
Creators: name: Langenecker, Sven
name: Sturm, Christoph
name: Schalles, Christian
name: Binnig, Carsten
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Semantic Type Detection||Column Annotated Corpora

description: Table corpora such as VizNet or TURL which contain annotated semantic types per column are important to build machine learning models for the task of automatic semantic type detection. However, there is a huge discrepancy between corpora that are used for training and testing since real-world data lakes contain a huge fraction of numerical data which are not present in existing corpora. Hence, in this paper, we introduce a new corpus that contains a much higher proportion of numerical columns than existing corpora. To reflect the distribution in real-world data lakes, our corpus SportsTables has on average approx. 86% numerical columns, posing new challenges to existing semantic type detection models which have mainly targeted non-numerical columns so far. To demonstrate this effect, we show the results of a first study using a state-of-the-art approach for semantic type detection on our new corpus and demonstrate significant performance differences in predicting semantic types for textual and numerical data.
Организация и боевое использование сухопутных вооруженных формирований флота на дальневосточных рубежах России в 1917-1922 гг. : проблема информативности источников
Creators: name: Воронов Виталий Николаевич
name: Тушков Александр Анатольевич
Publisher: name: Наука. Общество. Оборона
Year: 2017
Subjects: ГРАЖДАНСКАЯ ВОЙНА
СУХОПУТНЫЕ ВООРУЖЕННЫЕ ФОРМИРОВАНИЯ ФЛОТА
ВОЕННО-МОРСКОЕ СТРОИТЕЛЬСТВО
ИНОСТРАННАЯ ИНТЕРВЕНЦИЯ
ИСТОРИЯ
ИСТОРИОГРАФИЯ
РОССИЯ
СОВЕТСКАЯ РЕСПУБЛИКА

description: Статья посвящена проблеме информативности источников в области организации и боевого использованию сухопутных вооруженных формирований флота, сыгравших немаловажную роль в установлении Советской власти в конце 1917 начале 1918 гг., а также поддержки сил РККА на основных фронтах Гражданской войны.
Объективность и полнота исследования деятельности адмирала Ф. Ф. Ушакова
Creators: name: Рассохо-Анохина Валентина Николаевна
name: Карнаухов Михаил Васильевич
name: Чупраков Юрий Константинович
Publisher: name: Наука. Общество. Оборона
Year: 2017
Subjects: АДМИРАЛ Ф.Ф. УШАКОВ
ОСТРОВ ВИДО
ОСТРОВ КОРФУ
ДИССЕРТАЦИОННОЕ ИССЛЕДОВАНИЕ
ВОЕННО-МОРСКОЕ ИСКУССТВО
СИСТЕМА КОМПЛЕКТОВАНИЯ ЭКИПАЖЕЙ КОРАБЛЕЙ

description: В 2017 году исполняется 200 лет со дня кончины адмирала Федора Федоровича Ушакова. Деятельность адмирала, новаторство талантливого флотоводца принесли Отечеству несоизмеримую пользу. Исследования разносторонней деятельности адмирала повод для обсуждения в данной статье.
On the nature of heat in strongly coupled open quantum systems
Creators: name: Esposito, Massimiliano
name: Ochoa, Maicol A.
name: Galperin, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study heat transfers in a single level quantum dot strongly coupled to fermionic reservoirs and subjected to a time-dependent protocol modulating the dot energy as well as the dot-reservoir coupling strength. The dynamics is described using nonequilibrium Greens functions (NEGFs) evaluated to first order beyond quasi-static driving. We show that any heat definition expressed as an energy change in the reservoir energy plus any fraction of the system-reservoir interaction is not an exact differential when evaluated along reversible isothermal transformations, except when that fraction is zero. However, even in that latter case the reversible heat divided by temperature, namely the entropy, does not satisfy the third law of thermodynamics and diverges in the low temperature limit. Our results cast doubts on the possibility to define a thermodynamically consistent notion of heat expressed as the expectation value of some Hamiltonian terms.
description: 8 pages, 2 figures
title: Working with Disaggregated Systems. What are the Challenges and Opportunities of RDMA and CXL?
Creators: name: Geyer, Andreas
name: Ritter, Daniel
name: Lee, Dong Hun
name: Ahn, Minseon
name: Pietrzyk, Johannes
name: Krause, Alexander
name: Habich, Dirk
name: Lehner, Wolfgang
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: RDMA||CXL||Disaggregated Systems||Network||Memory

description: The usage of disaggregated systems in large scale data-centers offers a lot of flexibility and easy scalability in comparison to the traditional statically configured scale-up and scaleout systems. Disaggregated architectures allow for the creation of software composable systems in order to create a virtual machine by software out of the pool of available hardware resources. In this paper, we propose a memory disaggregation classification and applicable use cases. We would be delighted to present our ideas and the memory disaggregation classification at the workshop and discuss the presented ideas. The valuable feedback of the attendees will help us to further refine our classification both in terms of preciseness and applicability.
Qualification temps réel des données trajectoire des flotteurs Argo
Creators: name: Herbert, Gaelle
Publisher: name: Ifremer
Year: 2020

description: Ce document décrit l’algorithme des différents tests réalisés sur les variables du fichier TRAJ et META des flotteurs Argo visant à qualifier les données en temps réel. Les principales variables concernées sont les cycles (durée, enchainement), les positions et dates des localisations argos de surface, les mesures de température/salinité/pression en profondeur, et la variable ‘grounded’ qui indique si le flotteur a touché le fond ou non. L’ensemble des alertes associées aux incohérences ou problèmes repérés sont listés dans un fichier RT_alertes.txt consultable à la fin du programme. Dans certains cas, le flag peut être modifié. Les numéros de flotteurs et les cycles concernés par chaque alerte (de 1 à 30) sont récupérés dans une variable de type alerte[1à 30].txt. Les alertes ont également été regroupées en 8 types afin de pouvoir effectuer des comparaisons avec les alertes Altran.
Chemical Basis of Trotter-Suzuki Errors in Quantum Chemistry Simulation
Creators: name: Babbush, Ryan
name: McClean, Jarrod
name: Wecker, Dave
name: Aspuru-Guzik, Alán
name: Wiebe, Nathan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Although the simulation of quantum chemistry is one of the most anticipated applications of quantum computing, the scaling of known upper bounds on the complexity of these algorithms is daunting. Prior work has bounded errors due to Trotterization in terms of the norm of the error operator and analyzed scaling with respect to the number of spin-orbitals. However, we find that these error bounds can be loose by up to sixteen orders of magnitude for some molecules. Furthermore, numerical results for small systems fail to reveal any clear correlation between ground state error and number of spin-orbitals. We instead argue that chemical properties, such as the maximum nuclear charge in a molecule and the filling fraction of orbitals, can be decisive for determining the cost of a quantum simulation. Our analysis motivates several strategies to use classical processing to further reduce the required Trotter step size and to estimate the necessary number of steps, without requiring additional quantum resources. Finally, we demonstrate improved methods for state preparation techniques which are asymptotically superior to proposals in the simulation literature.
description: 18 pages, 11 figures
Exploring the reliability of chemical traits for RGB stars using accurate asteroseismic ages
Creators: name: Vitali, Sara
Publisher: name: Zenodo
Year: 2023

description: With the detailed measurements available for our Galaxy, the Milky Way is a unique laboratory for the galactic archaeology field which is trying to reconstruct the galactic evolution history from fossil records. The correlation suggested by galactic chemical evolution tells us that the overall metal content should increase with time. In this panorama, there is active research ongoing to choose which abundance ratios are the best to trace star formation history between stellar generations. The most useful ones are those that have a strong dependency with time, also known as ”chemical clocks”. Nevertheless, it has been recently demonstrated that chemical-clocks can not be used as universal relations being dependent on the metallicity and galactic environment of the star. In addition, precise age information is very difficult to obtain for field stars on larger scales. In this framework we are investigating a new method of determining ages from high precision spectroscopy alone by calibrating chemical clocks deriving accurate asteroseismic ages and high precision abundances. For this we have gathered a set of 75 stars covering a range of ages and metallicities using UVES spectrograph. Thanks to the exquisite quality of the data in terms of resolution (∼110000) and signal to noise (∼ 100) we aim to confirm (or reject) and calibrate the chemical clocks for field giants, achieving a key result for galactic archaeology.
Réhabilitation du Domaine Public Maritime du Bassin d'Arcachon : Bilan d'Activité 2022. Secteur du Tès
Creators: name: Rigouin, Loic
name: Ganthy, Florian
name: Lissardy, Muriel
Publisher: name: Ifremer
Year: 2023
Subjects: Travaux maritimes
herbiers de zostères
Bassin d’Arcachon

description: Le projet IDHEBARC s’intéresse à l’impact potentiel des travaux maritimes (nettoyage des friches ostréicoles, dragage des ports, …) sur les herbiers de zostères du Bassin d’Arcachon. Ce projet pluriannuel comporte des actions de modélisation hydrosédimentaire visant à cartographier l’intensité des impacts potentiels, et un suivi de l’évolution de l’emprise et du recouvrement des herbiers et de la composition de leur fond sédimentaire. Ce rapport présente les résultats du suivi réalisé dans le secteur du Tès (Bassin d’Arcachon) où des travaux de réhabilitation du Domaine Public Maritime ont été réalisés entre janvier 2022 et juin 2022.
Numerical analysis of the production of $D^{(*)}(3000)$, $D_{sJ}(3040)$ and their partners through the semileptonic decays of $B_{(s)}$ mesons in terms of the light-front quark model
Creators: name: Xu, Hao
name: Huang, Qi
name: Ke, Hong-Wei
name: Liu, Xiang
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Inspired by the newly observed $D^{(*)}(3000)$, and $D_{sJ}(3040)$ states, in this work we study the production of $D^{(*)}(3000)$, $D_{sJ}(3040)$ and their partners through the semileptonic decays of $B_{(s)}$ mesons, where the light-front Quark model is applied to the whole calculation. Our numerical results indicate that the $B_{(s)}$ semileptonic decays into the $2P$ states of the charmed or charmed-strange meson family have considerable branching ratios, which shows that these semileptonic decays can be accessible at future experiments, especially LHCb and the forthcoming Belle II.
description: 12 pages, 1 figure, and 6 tables. More discussions added. Accepted by Phys. Rev. D
Projet REVERSE. Réduction de la remise en suspension du sédiment et des émissions de gaz à effet de serre par les activités de chalutage
Creators: name: Vincent, Benoit
Publisher: name: Ifremer
Year: 2021

description: Sur environ 7000 navires de pêche recensés en métropole et Outre-Mer, 22% pratiquent le chalutage à panneaux de fond. Il est admis que cette technique de pêche provoque des impacts physiques sur les fonds marins et les habitats. En particulier les panneaux de chalut peuvent, selon leurs réglages, pénétrer dans le sédiment, remettre en suspension et déplacer le sédiment. Par ailleurs, les émissions de CO2 liées à la puissance mise en oeuvre pour remorquer un chalut de fond sont, pour 25 à 35%, attribuables aux panneaux. L’objectif du projet REVERSE et de développer des panneaux optimisés en termes de besoin d’énergie et utilisables dans un gréement à panneaux décollés du fond. L’impact des panneaux sur les habitats est ainsi quasi nul. Ce rapport de fin de projet présente, de manière synthétique, la méthodologie suivie pour atteindre cet objectif et les principaux résultats. Pour chaque section, la référence du rapport détaillé correspondant est fournie. Les études théoriques sont d’abord abordées : (1) simulation numérique des écoulements autour de panneaux et optimisation de leurs formes, (2) simulation numérique de la structure formée par les câbles, les panneaux et le chalut à des fins de dimensionnement. Des études en bassin sur modèles réduits ont ensuite permis de valider et discuter les résultats de ces simulations (1) et (2) pour aboutir à un modèle de panneau nommé Reverse dans le projet et actuellement commercialisé sous le nom d’Exocet II. Enfin une étude du comportement en dynamique de ces maquettes de panneaux a été réalisée mais reste à la fin du projet à approfondir. L’étape suivante concerne la validation sur le terrain des développements faits sur ces bases théoriques. Ainsi 4 campagnes d’essais ont été réalisées : une première sur le Navire Océanographique Europe, les 2 suivantes sur les navires professionnels de 24m et 18m pour essayer dans différentes conditions un gréement simple. La dernière campagne sur un navire professionnel de 25m a permis de valider un gréement pour chaluts jumeaux à 2 funes à panneaux décollés. Les essais prévus en autonomie (sans intervention de l’équipe projet) n’ont pas trouvé de volontaire et se sont limités à quelques jours supplémentaires pendant lesquels les équipages des chalutiers de 18m et 25m ont conservé les panneaux. Les partenaires du projet REVERSE sont les Ets Morgère, l’ENSTA Brest, le CNPMEM et l’IFREMER, coordinateur. Nous remercions sincèrement pour leur implication et leur expertise les armements est les équipages qui ont participé aux essais en mer.
Constraining non--BPS interactions from counterterms in three loop maximal supergravity
Creators: name: Basu, Anirban
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The structure of one, two and three loop counterterms imposes strong constraints on several non--BPS interactions in the low momentum expansion of the three loop four graviton amplitude in maximal supergravity. The constraints are imposed by demanding consistency with string amplitudes. We analyze these constraints imposed on the D^8 R^4 interaction in 11 dimensional supergravity compactified on T^2. We also discuss partial contributions from counterterms to interactions at higher orders in the momentum expansion.
description: 31 pages, LaTeX, 8 figures
title: Adaptive Architectures for Robust Data Management Systems
Creators: name: Bang, Tiemo
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Database Management System||Architecture||Adaptation||Scale-Up||Scale-Out

description: Form follows function is a well-known expression by the architect Sullivan asserting that the architecture of a building should follow its function. 'Adaptive Architectures for Robust Data Management Systems' is a dissertation asserting that DBMS architectures should follow changing workload and hardware to robustly achieve high DBMS performance. The dissertation first evaluates how workload and hardware affect the performance of DBMSs with static architectures. This evaluation concludes that static DBMS architectures degrade DBMS performance under changing workload and hardware, and hence the DBMS architecture has to become adaptive. Subsequently, adaptation concepts for the architecture of single-server and multi-server DBMSs are proposed. These concepts focus fine-grained adaptation of DBMS architectures and are realized through asynchronous programming models. These programming models decouple the implementation of DBMS components from fine-grained architectural optimization. Thereby, optimizers can derive novel architectures better fitting individual DBMS components, leading to high and robust DBMS performance under changing conditions.
Shell model and deformed shell model spectroscopy of $^{62}$Ga
Creators: name: Srivastava, P. C.
name: Sahu, R.
name: Kota, V. K. B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In the present work we have reported comprehensive analysis of recently available experimental data [H.M. David et al., Phys. Lett. B {\bf 726}, 665 (2013)] for high-spin states up to $17^+$ with $T=0$ in the odd-odd $N=Z$ nucleus $^{62}$Ga using shell model calculations within the full $f_{5/2}pg_{9/2}$ model space and deformed shell model based on Hartee-Fock intrinsic states in the same space. The calculations have been performed using jj44b effective interaction developed recently by B.A. Brown and A.F. Lisetskiy for this model space. The results obtained with the two models are similar and they are in reasonable agreement with experimental data. In addition to the $T=0$ and $T=1$ energy bands, band crossings and electromagnetic transition probabilities, we have also calculated the pairing energy in shell model and all these compare well with the available theoretical results.
description: 9 pages, 4 figures
Iterative solution of systems of linear equations in microwave circuits using a block quasi-minimal residual algorithm
Creators: name: Hebermehl, Georg
name: Hübner, Friedrich-Karl
name: Schlundt, Rainer
name: Zscheile, Horst
name: Heinrich, Wolfgang
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Microwave device simulation
subject: Scattering matrix
subject: Maxwell's equations
subject: Boundary value problem
subject: Finite integration technique
subject: Eigenvalue problem
subject: System of linear algebraicequations
subject: Multiple right-hand sides
subject: 35Q60
subject: 65F10
subject: 65F15
subject: 65N22

description: The electric properties of monolithic microwave integrated circuits that are connected to transmission lines are described in terms of their scattering matrix using Maxwell's equations. Using a finite-volume method the corresponding three-dimensional boundary value problem of Maxwell's equations in the frequency domain can be solved by means of a two-step procedure. An eigenvalue problem for non-symmetric matrices yields the wave modes. The eigenfunctions determine the boundary values at the ports of the transmission lines for the calculation of the fields in the three-dimensional structure. The electromagnetic fields and the scattering matrix elements are achieved by the solution of large-scale systems of linear equations with indefinite complex symmetric coefficient matrices. In many situations, these matrix problems need to be solved repeatedly for different right-hand sides, but with the same coefficient matrix. The block quasi-minimal residual algorithm is a block Krylov subspace iterative method that incorporates deflation to delete linearly and almost linearly dependent vectors in the underlying block Krylov sequences.
Pulsed Low-Field Electrically Detected Magnetic Resonance
Creators: name: Dreher, L.
name: Hoehne, F.
name: Morishita, H.
name: Huebl, H.
name: Stutzmann, M.
name: Itoh, K. M.
name: Brandt, M. S.
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: We present pulsed electrically detected magnetic resonance (EDMR) measurements at low magnetic fields using posphorus-doped silicon with natural isotope composition as a model system. Our measurements show that pulsed EDMR experiments, well established at X-band frequencies (10 GHz), such as coherent spin rotations, Hahn echoes, and measurements of parallel and antiparallel spin pair life times are also feasible at frequencies in the MHz regime. We find that the Rabi frequency of the coupled 31P electron-nuclear spin system scales with the magnetic field as predicted by the spin Hamiltonian, while the measured spin coherence and recombination times do not strongly depend on the magnetic field in the region investigated. The usefulness of pulsed low-field EDMR for measurements of small hyperfine interactions is demonstrated by electron spin echo envelope modulation measurements of the Pb0 dangling-bond state at the Si/SiO2 interface. A pronounced modulation with a frequency at the free Larmor frequency of hydrogen nuclei was observed for radio frequencies between 38 MHz and 400 MHz, attributed to the nuclear magnetic resonance of hydrogen in an adsorbed layer of water This demonstrates the high sensitivity of low-field EDMR also for spins not directly participating in the spin-dependent transport investigated.
description: 12 pages, 5 figures
title: Learn What Really Matters: A Learning-to-Rank Approach for ML-based Query Optimization
Creators: name: Behr, Henriette
name: Markl, Volker
name: Kaoudi, Zoi
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: query optimization||learning-to-rank||cost model

description: Query optimization is crucial for any data management system to achieve good performance. Recent advancements in Machine Learning (ML) have led to several efforts in the database research community that aim at improving query optimization with the help of ML. In particular, many works propose replacing the cost model used during plan enumeration with an ML model. The goal of these works is to learn a regression model from previously executed query plans that estimates the runtime of a given plan. Interestingly, it is well-known that what really matters in query optimization is the order of the query plans and not their actual cost or runtime. We thus take a learning-to-rank approach and propose a novel neural network model architecture that considers a plan in comparison with other equivalent plans that belong to the same query. We use our model architecture together with a loss function that incorporates ranking metrics into the learning process to highlight the learning-to-rank objective.To enable training, we first extract features from query plans by adapting a state-of-the-art deep learning approach so that all features are independent of the input dataset schema. Second, we devise two score functions that map the runtime of plans to scores which are then used as labels. We integrate the trained model into an adapted bottom-up plan enumeration algorithm that finds the best possible execution plan for a given query. We evaluate our approach against two state-of-the-art ML models and the highly tuned cost model of a commercial database and measure the runtime of the plans chosen in each case when executed in the database. We show that our approach achieves up to an order of magnitude better query performance than the comparison models and is able to either match (for short and medium-running queries) or outperform the commercial database (up to 5x for long-running queries).
Bouncing cosmologies and stability analysis in symmetric teleparallel $f(Q)$ gravity
Creators: name: Koussour, M.
name: Myrzakulov, N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper is devoted to examining cosmological bouncing scenarios in the framework of the recently proposed symmetric teleparallel gravity (or $f(Q)$ gravity), where the non-metricity scalar $Q$ represents the gravitational interaction. We assume an $f(Q)$ model in the form of $f(Q)=αQ^n$, where $α$ and $n$ are free model parameters. To obtain a bouncing universe, we consider a special form of the scale factor $a(t)$ in terms of cosmic time, specifically $a(t) = (1+λt^2)^{1/3}$, where $λ$ is an arbitrary constant. We derive the field equations for the flat FLRW universe and obtain the corresponding exact solution. We investigate the physical behavior of various cosmological parameters such as the deceleration parameter, pressure, and equation of state (EoS) parameter with the energy conditions for our bounce cosmological model. Furthermore, we investigate the behavior of the perturbation terms $δ_m(t)$ and $δ(t)$ with respect to cosmic time $t$ using the scalar perturbation approach. We found that although the model exhibits unstable behavior at the beginning for a brief period, it shows mostly stable behavior for most of the time. Finally, we conclude that the EoS parameter crosses the quintom line $ω=-1$ in the vicinity of the bouncing point $t=0$, which confirms the success of our bounce cosmological model.
description: The European Physical Journal Plus accepted version
title: UniDash: Interactive Dashboard for Data Driven Insights on Universities
Creators: name: Bayer, Mirjam Raffaela
name: Hansen, Yorik Timo
name: Kosbü, Kimberley
name: Kulow, Andrea
name: Kröger, Peer
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: interactive dashboard||academic advising||data-driven decision-making

description: Universities, like other institutions or companies are under a steady quality control inpursuit of improvement. Generating pertinent insights from consistently collected data at universitiesis one of the many possibilities to integrate data science into our educational system. The proposedprototype dashboard is designed for educational institutions to visually assess their shifts in relevanttopics such as diversity, accessibility, and planning aspects. This paper shows the workflow anddashboard using the UnivIS database of Kiel University for extracting and preprocessing the data. Theproposed demo revealed interesting insights, such as in the planning, lecture halls are selected withonly 50% capacity utilization, rooms for less that 50 people are planned to use 100% capacity. Thedemonstration web application can be tested in German at unidash.tk.
Gate-controlled supercurrent reversal in MoS$_2$-based Josephson junctions
Creators: name: Rameshti, Babak Zare
name: Moghaddam, Ali G.
name: Zareyan, Malek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by recent experiments revealing superconductivity in MoS$_2$, we investigate the Josephson effect in the monolayer MoS$_2$ at the presence of an exchange splitting. We show that the supercurrent reversal known as $0-π$ transition can occur by varying the doping via gate voltages. This is in contrast to common superconductor/ferromagnet/superconductor junctions in which successive $0-π$ transition take place with the variation of junction length or temperature. In fact for the case of MoS$_2$ we find that both the amplitude and the period of oscillations show a dependence on the doping which explains the predicted doping induced supercurrent reversal. These effects comes from the dependence of density and Fermi velocity on the doping strength beside the intrinsic spin splitting in the valence band which originates from spin-orbit interaction.
description: 5 pages, 3 figures
title: IBM Data Gate: Making On-Premises Mainframe Databases Available to Cloud Applications
Creators: name: Stolze, Knut
name: Beier, Felix
name: Dimov, Vassil
name: Kalogeiton, Eirini
name: Toši?, Mateo
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023

description: Many companies use databases on the mainframe for their mission critical applications. They will continue to do so in the future. It is important to exploit this existing data for analysis and business decisions via modern applications that are often built for cloud environments. IBM Db2 for z/OS Data Gate (Data Gate) is bridging the gap between mainframe databases and such cloud-native applications. It offers high-performance data synchronization connecting both worlds, while providing data coherence at the level of individual transactions.Data Gate is a hybrid cloud solution, which protects existing systems and applications (and investments into those) while enabling new use cases to work with and analyze mainframe data. It evolved from the IBM Db2 Analytics Accelerator (IDAA) technology by adjusting the architecture and some of the functionality. In this paper, we give an overview of Data Gate and how it addresses typical ETL issues like code page conversions, data coherence, encryption or integration with other cloud services. We also describe how Data Gate can be used to handle query acceleration or archiving of cold data -just like IDAA did. Along the lines, we highlight key differences between the two products.
GOLDYS - 3 cruise,JEAN-LOUIS VINCENT R/V
Creators: name: Sandrine, VAZ
name: VILLENEUVE Rémi
name: RAPHALEN Elio
Publisher: name: Sismer
Year: 2022

description: Suite à la mise en oeuvre du plan de gestion WESTMED en 2020, le besoin accru de connaissances sur le fonctionnement du Golfe du Lion a été souligné par l'ensemble des acteurs, pêcheurs professionnels, scientifiques et gestionnaires. Le projet Goldys (Dynamique Saisonnière du Golfe du Lion), est un projet porté par Ifremer en partenariat avec le CRPMEM-Occitanie, et cofinancé par les fonds FEAMP, France Filière Pêche et la région Occitanie jusqu'en Juin 2023. Il ambitionne de répondre à certaines questions sur le fonctionnement écologique du Golfe du Lion et la dynamique saisonnière des espèces exploitées par les flottilles chalutières.
En particulier, via la mise en oeuvre de campagnes d'observation tout au long de l'année, il vise à compléter la vision estivale du système obtenue par le biais des campagnes scientifiques déployées en Juin et Juillet par Ifremer (campagnes MEDITS et PELMED). En s'appuyant sur les même protocoles et engins d'observation que sur ces campagnes (pour permettre la comparaison entre les saisons) mais en les déployant sur un chalutier méditerranéen, il vise à observer :
- L'évolution saisonnière de l'ensemble des espèces pêchées au chalut de fond vivant proches ou sur du fond
- Les cycles reproductifs d'un grand nombre d'entre elle (définir les périodes de pontes)
- Les zones de pontes et de nourriceries
- L'évolution saisonnière de la productivité du milieu (hydrologie, communautés phyto- et zoo-planctoniques)
Les trois campagnes saisonnières GOLDYS (printemps, automne, hiver) visent donc à couvrir une partie représentative du Golfe du Lion en reprenant pour partie les points observés lors de la campagne MEDITS et en les complétant par des traînes professionnelles. Pour ce faire, 40 opérations par saison, s'étalant sur 75 jours de mer, ont été réalisées entre Avril 2022 et Mars 2023.
Bateaux de pêche professionnelle de La Réunion - Palangrier côtier
Creators: name: Evano, Hugues
Publisher: name: Ifremer
Year: 2022

description: Ce bateau de pêche professionnelle réunionnaise appartient à la flottille "Pêche Palangrière". - Les palangriers côiers ont une longueur comprise en 8 et 12 mètres et travaillent dans la zone comprise entre les 12 et les 20 milles de la côte réunionnaise. - Les palangriers hauturiers ont une longueur de plus de 12 mètres et travaillent au-delà de la zone des 20 milles de la côte réunionnaise.
Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit
Creators: name: Mehl, Sebastian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The three-electron configuration of gate-defined double quantum dots encodes a promising qubit for quantum information processing. I propose a two-qubit entangling gate using a pulse-gated manipulation procedure. The requirements for high-fidelity entangling operations are equivalent to the requirements for the pulse-gated single-qubit manipulations that have been successfully realized for Si QDs. This two-qubit gate completes the universal set of all-pulse-gated operations for the three-electron double-dot qubit and paves the way for a scalable setup to achieve quantum computation.
description: 8 pages, 4 figures
Comparison of Self-Report Data Validity in Undergraduate Samples Using Remote Versus In-Person Administration Methods
Creators: name: Sharpe, Brinkley
name: Rose, Leigha
name: Phillips, Nathaniel
name: Lynam, Donald
name: Miller, Josh
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Psychology
subject: FOS: Psychology
subject: Social and Behavioral Sciences
subject: remote administration
subject: self-report
subject: surveys
subject: undergraduates
subject: validity

description: The purpose of the present study is to test whether administration approach (remote vs. in person) yields meaningful differences in data validity of self-report surveys. Specifically, we will randomly assign participants to complete questionnaires in a typical laboratory administration setting (i.e., groups of 4-8; 1-2 research assistants present to monitor) versus remotely in a location of their choosing. Data from both conditions will be examined using multiple data validation strategies discussed previously (Sharpe et al., in press).
Calidad de vida en adulto mayor
Creators: name: Torres, Erika Johana Pantoja
name: Ojeda, Angela Patricia Giron
name: Estudiantes De Semillero TROSPUS
Publisher: name: Zenodo
Year: 2022

description: infografía de información de un trabajo de investigación denominado: calidad de vida en un grupo de adultos mayores pertenecientes a un centro geriátrico.
title: Accelerating Large Table Scan using Processing-In-Memory Technology
Creators: name: Baumstark, Alexander
name: Jibril, Muhammad Attahir
name: Sattler, Kai-Uwe
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: UPMEM||Processing-In-Memory||In-Memory Database

description: Today’s systems are capable of storing large amounts of data in main memory. In-memoryDBMSs can benefit particularly from this development. However, the processing of the data fromthe main memory necessarily has to run via the CPU. This creates a bottleneck, which affects thepossible performance of the DBMS. The Processing-In-Memory (PIM) technology is a paradigm toovercome this problem, which was not available in commercial systems for a long time. However, withthe availability of UPMEM, a commercial system is finally available that provides PIM technologyin hardware. In this work, the main focus was on the optimization of the table scan, a fundamental,and memory-bound operation. Here a possible approach is shown, which can be used to optimizethis operation by using PIM. This method was then tested for parallelism and execution time inbenchmarks with different table sizes and compared to the usual table scan. The result is a table scanthat outperforms the scan on the usual CPU significantly.
Dielectric Square Resonator Investigated with Microwave Experiments
Creators: name: Bittner, S.
name: Bogomolny, E.
name: Dietz, B.
name: Miski-Oglu, M.
name: Richter, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a detailed experimental study of the symmetry properties and the momentum space representation of the field distributions of a dielectric square resonator as well as the comparison with a semiclassical model. The experiments have been performed with a flat ceramic microwave resonator. Both the resonance spectra and the field distributions were measured. The momentum space representations of the latter evidenced that the resonant states are each related to a specific classical torus, leading to the regular structure of the spectrum. Furthermore, they allow for a precise determination of the refractive index. Measurements with different arrangements of the emitting and the receiving antennas were performed and their influence on the symmetry properties of the field distributions was investigated in detail, showing that resonances with specific symmetries can be selected purposefully. In addition, the length spectrum deduced from the measured resonance spectra and the trace formula for the dielectric square resonator are discussed in the framework of the semiclassical model.
description: 20 pages, 13 figures, 3 tables