cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Wide Field Imager Lyman-Alpha Search (WFILAS) for Galaxies at Redshift ~5.7: II. Survey Design and Sample Analysis
Creators: name: Westra, E.
name: Jones, D. Heath
name: Lidman, C. E.
name: Meisenheimer, K.
name: Athreya, R. M.
name: Wolf, C.
name: Szeifert, T.
name: Pompei, E.
name: Vanzi, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Wide-field narrowband surveys are an efficient way of searching large volumes of high-redshift space for distant galaxies. Aims: We describe the Wide Field Imager Lyman-Alpha Search (WFILAS) over 0.74 sq. degree for bright emission-line galaxies at z~5.7. Methods: WFILAS uses deep images taken with the Wide Field Imager (WFI) on the ESO/MPI 2.2m telescope in three narrowband (70 A), one encompassing intermediate band (220 A) and two broadband filters, B and R. We use the novel technique of an encompassing intermediate band filter to exclude false detections. Images taken with broadband B and R filters are used to remove low redshift galaxies from our sample. Results: We present a sample of seven Lya emitting galaxy candidates, two of which are spectroscopically confirmed. Compared to other surveys all our candidates are bright, the results of this survey complements other narrowband surveys at this redshift. Most of our candidates are in the regime of bright luminosities, beyond the reach of less voluminous surveys. Adding our candidates to those of another survey increases the derived luminosity density by ~30%. We also find potential clustering in the Chandra Deep Field South, supporting overdensities discovered by other surveys. Based on a FORS2/VLT spectrum we additionally present the analysis of the second confirmed Lya emitting galaxy in our sample. We find that it is the brightest Lya emitting galaxy (1 x 10^-16 erg s^-1 cm^-2) at this redshift to date and the second confirmed candidate of our survey. Both objects exhibit the presence of a possible second Lya component redward of the line.
description: 15 pages, accepted for publication in A&A Replaced with published version
Why are there Seven Sisters?
Creators: name: Norris, Ray P.
name: Norris, Barnaby R. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Popular Physics (physics.pop-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: There are two puzzles surrounding the Pleiades, or Seven Sisters. First, why are the mythological stories surrounding them, typically involving seven young girls being chased by a man associated with the constellation Orion, so similar in vastly separated cultures, such as the Australian Aboriginal cultures and Greek mythology? Second, why do most cultures call them "Seven Sisters" even though most people with good eyesight see only six stars? Here we show that both these puzzles may be explained by a combination of the great antiquity of the stories combined with the proper motion of the stars, and that these stories may predate the departure of most modern humans out of Africa around 100,000 BC.
description: Accepted for publication in "Advancing Cultural Astronomy: Studies in Honour of Clive Ruggles", publ. Springer
A New Framework for Multijet Predictions and its application to Higgs Boson production at the LHC
Creators: name: Andersen, Jeppe R.
name: White, Chris D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new framework for calculating multi-jet observables through resummation. The framework is based on the factorisation of scattering amplitudes in an asymptotic limit. By imposing simple constraints on the analytic behaviour of the result when applied away from this limit, we get good agreement with the known lowest order perturbative behaviour of the scattering amplitude, and predictions for the behaviour to all orders in the perturbative series. As an example of application we study predictions for Higgs Boson production through gluon fusion at the LHC in association with at least two jets.
description: 5p
Repositório institucional como ferramenta de avaliação científica: proposição para o sistema da pós-graduação brasileira
Creators: name: de Araújo Guedes Marques, Clediane
name: Queiroz Maia, Maria Aniolly
name: Pereira de Carvalho, Guilherme Henrique
name: Segundo, Washington
name: Garcia de Souza, Marcel
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Pecha Kucha III, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
Real-normalized differentials with a single order $2$ pole
Creators: name: Krichever, Igor
name: Lando, Sergei
name: Skripchenko, Alexandra
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: A meromorphic differential on a Riemann surface is said to be {\it real-normalized} if all its periods are real. Real-normalized differentials on Riemann surfaces of given genus with prescribed orders of their poles form real orbifolds whose topology is closely related to that of moduli spaces of Riemann surfaces with marked points. Our goal is to develop tools to study this topology. We propose a combinatorial model for the real normalized differentials with a single order $2$ pole and use it to analyze the corresponding absolute period foliation.
description: 25 pages
Scattering of a relativistic scalar particle by a cusp potential
Creators: name: Villalba, Victor M.
name: Rojas, Clara
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We solve the Klein-Gordon equation in the presence of a spatially one-dimensional cusp potential. The scattering solutions are obtained in terms of Whittaker functions and the condition for the existence of transmission resonances is derived. We show the dependence of the zero-reflection condition on the shape of the potential. In the low momentum limit, transmission resonances are associated with half-bound states. We express the condition for transmission resonances in terms of the phase shifts.
description: To appear in Physics Letters A
Velocity derivatives in a high Reynolds number turbulent boundary layer. Part III: Optimization of an SPIV experiment for derivative moments assessment
Creators: name: Foucaut, Jean-Marc
name: George, William K.
name: Stanislas, Michel
name: Cuvier, Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: An SPIV experiment using two orthogonal planes simultaneously was performed in the LML boundary layer facility to specifically measure all of the derivative moments needed to estimate the dissipation rate of the Turbulence Kinetic Energy. The Reynolds number was $Re_θ= 7500$ or $Re_τ= 2300$. A detailed analysis of the errors in derivative measurements was carried out, as well as applying and using consistency checks derived from the continuity equation. The random noise error was quantified, and used to ``de-noise'' the derivative moments. A comparison with a DNS channel flow at comparable Reynolds number demonstrated the capability of the technique. The results were further validated using the recent theory developed by George and Stanislas 2020. The resulting data have been extensively used in parts I and II of the present contribution to study near wall dissipation. An important result of the present work is the provision of reliable rules for an accurate assessment of the dissipation in future PIV experiments.
description: 27 pages, 19 figures
Defect Fluctuations and Lifetimes in Disordered Yukawa Systems
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We examine the time dependent defect fluctuations and lifetimes for a bidisperse disordered assembly of Yukawa particles. At high temperatures, the noise spectrum of fluctuations is white and the coordination number lifetimes have a stretched exponential distribution. At lower temperatures, the system dynamically freezes, the defect fluctuations exhibit a 1/f spectrum, and there is a power law distribution of the coordination number lifetimes. Our results indicate that topological defect fluctuations may be a useful way to characterize systems exhibiting dynamical heterogeneities.
description: 6 pages, 5 postscript figures, new results added; version to appear in Phys. Rev. E
Security And Privacy Challenges in Cloud Based Data Warehousing A Comprehensive Review
Creators: name: Ahmadi, Sina
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460403
subject: Data security and protection
classificationCode: 460402
subject: Data and information privacy
classificationCode: 460499
subject: Cybersecurity and privacy not elsewhere classified

description: Nowadays, certain trends in technology have emerged, especially in cloud-based data warehousing. Organizations and associations use cloud-based data warehousing to store large amounts of data. However, this data warehousing type has many risks and challenges, such as privacy concerns. Some major security challenges are data breaches, malware attacks and data theft, which violates legal privacy frameworks, such as the Consumer Privacy Act. Certain measures like contractual agreements and data ownership can control these risks. The major object of this paper is to discuss the security and privacy challenges in cloud-based data warehousing used by private and government organizations. Some important challenges are complex cloud computing models, dynamic nature and interconnected ecosystems. The need for more resources is another major challenge for the companies which comes with the budgeting issues.
Optimizing Data Warehousing Performance through Machine Learning Algorithms in the Cloud
Creators: name: Ahmadi, Sina
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 461199
subject: Machine learning not elsewhere classified
classificationCode: 460599
subject: Data management and data science not elsewhere classified
classificationCode: 460601
subject: Cloud computing
classificationCode: 460605
subject: Distributed systems and algorithms

description: This comprehensive overview explores the integration of machine learning (ML) in data warehousing, focusing on optimization challenges, methodologies, results, and future trends. Data warehouses, central to reporting and analysis, undergo a transformative shift with ML, addressing challenges like high maintenance costs and failure rates. The integration enhances performance through query optimization, indexing, and automated data management. Results showcase ML's application in predictive analytics for workload management, automated query optimization, and adaptive resource allocation, thus improving efficiency. However, challenges include data privacy, security concerns, and skill/resource constraints. The future scope anticipates trends like Explainable AI, Automated ML, Augmented Analytics, Federated Learning, and Continuous Intelligence, offering potential impacts on decision-making, resource allocation, data management, privacy, and real-time responsiveness. This succinct summary encapsulates the critical aspects of ML in data warehousing for holistic understanding.
Next Generation AI Based Firewalls A Comparative Study
Creators: name: Ahmadi, Sina
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460201
subject: Artificial life and complex adaptive systems

description: Cybersecurity is a critical concern in the digital age, demanding innovative approaches to safeguard sensitive information and systems. This paper conducts a thorough examination of next-generation firewalls (NGFWs) that integrate artificial intelligence (AI) technologies, presenting a comparative analysis of their efficacy. As traditional firewalls fall short in addressing modern cyber threats, the incorporation of AI provides a promising avenue for enhanced threat detection and mitigation. The literature review explores existing research on AI-based firewalls, delving into methodologies and technologies proposed by leading experts in the field. A compilation of 20-25 references from reputable sources, including ijcseonline.org, forms the basis for this comparative study. The selected references provide insights into various AI-based firewall architectures, algorithms, and performance metrics, laying the groundwork for a comprehensive analysis. The methodology section outlines the systematic approach employed to compare different AI-based firewall methods. Leveraging machine learning and deep learning approaches, the study assesses key performance metrics such as detection accuracy, false positive rates, and computational efficiency. The goal is to provide a nuanced understanding of the strengths and weaknesses inherent in each approach, facilitating an informed evaluation. The comparative analysis section employs graphical representations to elucidate the findings, offering a visual overview of the performance disparities among selected AI-based firewall methods. Pros and cons are meticulously examined, providing stakeholders with valuable insights for decision-making in cybersecurity strategy. This research aims to contribute to the ongoing discourse on AI-based firewalls, addressing current limitations and paving the way for advancements that fortify the cybersecurity landscape.
Studying the effects and cause of the massive star formation in Messier 8 East
Creators: name: Tiwari, M.
name: Menten, K. M.
name: Wyrowski, F.
name: Giannetti, A.
name: Lee, M. -Y.
name: Kim, W. -J.
name: Pérez-Beaupuits, J. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Messier 8 (M8), one of the brightest HII regions in our Galaxy, is associated with two prominent massive star-forming regions: M8-Main, the particularly bright part of the large scale HII region (mainly) ionised by the stellar system Herschel 36 (Her 36) and M8 East (M8 E), which is mainly powered by a deeply embedded young stellar object (YSO), a bright infrared (IR) source, M8E-IR. We aim to study the interaction of the massive star-forming region M8 E with its surroundings and to compare the star-forming environments of M8-Main and M8 E. We used the IRAM 30 m telescope to perform an imaging spectroscopy survey of the molecular environment of M8E-IR. We imaged and analysed data for the $J$ = 1 $\to$ 0 rotational transitions of $^{12}$CO, $^{13}$CO, N$_2$H$^+$, HCN, H$^{13}$CN, HCO$^+$, H$^{13}$CO$^+$, HNC and HN$^{13}$C observed for the first time toward M8~E. We used LTE and non-LTE techniques to determine column densities of the observed species and to constrain the physical conditions of the gas responsible for their emission. Examining the YSO population in M8~E allows us to explore the observed ionization front (IF) as seen in GLIMPSE 8~$μ$m emission image. We find that $^{12}$CO probes the warm diffuse gas also traced by the GLIMPSE 8~$μ$m emission, while N$_2$H$^+$ and HN$^{13}$C trace the cool and dense gas. We find that the star-formation in M8~E appears to be triggered by the earlier formed stellar cluster NGC~6530, which powers an HII region giving rise to an IF that is moving at a speed $\geq$ 0.26~km~s$^{-1}$ across M8~E. We derive temperatures of 80 K and 30 K for the warm and cool gas components, respectively, and constrain H$_2$ volume densities to be in the range of 10$^4$--10$^6$~cm$^{-3}$. Comparison of the observed abundances of various species reflects the fact that M8~E is at an earlier stage of massive star formation than M8-Main.
A Theory for Valiant's Matchcircuits (Extended Abstract)
Creators: name: Li, Angsheng
name: Xia, Mingji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: The computational function of a matchgate is represented by its character matrix. In this article, we show that all nonsingular character matrices are closed under matrix inverse operation, so that for every $k$, the nonsingular character matrices of $k$-bit matchgates form a group, extending the recent work of Cai and Choudhary (2006) of the same result for the case of $k=2$, and that the single and the two-bit matchgates are universal for matchcircuits, answering a question of Valiant (2002).
Deconfining Phase Boundary of Rapidly Rotating Hot and Dense Matter and Analysis of Moment of Inertia
Creators: name: Fujimoto, Yuki
name: Fukushima, Kenji
name: Hidaka, Yoshimasa
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss the effect of rapid rotation on the phase diagram of hadronic matter. The energy dispersion relation is shifted by an effective chemical potential induced by rotation. This suggests that rotation should lower the critical temperature of chiral restoration, but it is still controversial how the deconfinement temperature should change as a function of angular velocity. We adopt the hadron resonance gas model as an approach free from fitting parameters. We identify the deconfinement from the thermodynamic behavior and find that rotation decreases the deconfinement temperature. We also discuss the spatial inhomogeneity of the pressure and give a semi-quantitative estimate of the moment of inertia.
description: 7 pages, 3 figures
ELEKTRON TIJORATDA SHARTNOMA TUSHUNCHASI VA BELGILARI
Creators: name: Aliyeva, Marjona
Publisher: name: Zenodo
Year: 2024

description: Raqamli iqtisodiyotda mutlaqo yangi, ilgari noma’lum bo‘lgan ijtimoiy munosabatlar shakllanayotgan bir vaqtda, yangi huquq paradigmasida huquqiy tartibga solishni raqamlashtirish masalasi yuzaga kelmoqda. Raqamli texnoligiyalarning rivojlanishi, yangidan yangi imkoniyatlarining yaratilishi hozirgi zamon huquq fani oldiga huquqning zamonaviy sohalarini takomillashtirish vazifasini qo‘ymoqda.
Student curators and exhibit "labs" in libraries
Creators: name: Hardy, Beatriz
name: Davy, Jennie
Publisher: name: Maryland Shared Open Access Repository
Year: 2015
Subjects: Student Curators
Archives
Libraries

description: This presentation will focus on student curators and the creation of exhibits labs in libraries at Salisbury University and the College of William & Mary. Bea Hardy is Dean of Libraries at Salisbury University, and Jennie Davy is the Burger Archives Specialist at William & Mary’s Swem Library.
Production of the top-pions from the higgsless--top-Higgs model at the LHC
Creators: name: Yue, Chong-Xing
name: Di, Yi-Qun
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The top-pions($π_{t}^{0,\pm}$) predicted by extra dimensional descriptions of the topcolor scenario have similar feature with those in four dimensional topcolor scenario, which have large Yukawa couplings to the third generation quarks. In the context of the higgsless--top-Higgs(HTH) model, we discuss the production of these new particles at the CERN Large Hadron Collider(LHC) via various suitable mechanisms (gluon-gluon fusion, bottom-bottom fusion, gluon-bottom fusion, and the usual Drell-Yan processes) and estimate their production rates. We find that, as long as the top-pions are not too heavy, they can be abundantly produced at the LHC. The possible signatures of these new particles might be detected at the LHC experiments.
description: 18pages, 6 figures, discussions and references added, typos corrected
Entwicklung und Synthese neuartiger Silicium-basierter Fluorid-Akzeptoren für Anwendungen als Radiotracer in der Positronen-Emissions-Tomographie
Creators: name: Mawick, Matthias
Publisher: name: TU Dortmund
Year: 2023
Subjects: subject: Positronen-Emissions-Tomographie
subject: Ringöffnung
subject: Silicium
subject: Fluor
subject: Azasilol
subject: 540
subject: Fluor
subject: Positronen-Emissions-Tomographie

description: Die Positronen-Emissions-Tomographie zählt zu den wichtigsten diagnostischen Methoden der Nuklearmedizin. In Kombination mit der Computertomographie ermöglicht sie eine nichtinvasive Bildgebung zur morphologischen und funktionellen Darstellung von Gewebe. Für die Aufnahme der Bilder werden den behandelten Personen Radiopharmazeutika verabreicht, die einen radioaktiv markierten Tracer enthalten und die Aufnahme der Schnittbilder erst ermöglichen. Abhängig vom jeweiligen Einsatzgebiet kann eine Vielzahl von Verbindungsklassen als Radiotracer eingesetzt werden. Eine noch relativ neue, aber bereits klinisch eingesetzte Variante stellen die Silicium-basierten Fluorid-Akzeptoren (SiFA-Verbindungen) dar. Diese enthalten eine 19F Si-Bindung, die unter milden Reaktions-bedingungen durch einen Isotopenaustausch mit radioaktivem 18F markiert werden kann. Der Fokus dieser Arbeit liegt auf der Erweiterung des Spektrums einsetzbarer Markierungsvorläufer. Zunächst wurde versucht, die bekannten SiFA-Verbindungen durch Konjugation an wasserlösliche, bifunktionalisierte Cyclodextrine hydrophiler zu machen, um die Anwendbarkeit in vivo zu vereinfachen. Anschließend konnten SiFA-Derivate mit bisher unbekanntem Substitutionsmuster am Siliciumatom synthetisiert, sowie einige ihrer experimentellen und theoretischen hydrolytischen Halbwertszeiten ermittelt werden. Schließlich gelang die Synthese neuartiger CycloSiFA-Derivate als Weiterentwicklung der klassischen [19F]SiFA-Markierungsvorläufer. Diese enthalten eine Si N-Bindung und lassen sich unter Ringöffnung markieren. Dabei werden Gleichgewichtsreaktionen umgangen, sodass idealerweise Radiotracer mit hohen Aktivitäten zugänglich sind. Zusätzlich konnte eine kleine Bibliothek funktionalisierter CycloSiFA-Verbindungen aufgebaut werden, die eine effiziente On-Demand-Kupplung an biologisch aktive Moleküle ermöglichen sollte. Neben Experimenten zu Folgereaktionen sowie Testreaktionen zur Kupplung an kleinere Moleküle, konnte durch eine Kooperation mit der Forschungsgruppe SCHIRRMACHER auch ein Protokoll zur Radiomarkierung der CycloSiFA-Derivate mit 18F erarbeitet werden.
Geometric Set Cover and Hitting Sets for Polytopes in $R^3$
Creators: name: Laue, Sören
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Suppose we are given a finite set of points $P$ in $\R^3$ and a collection of polytopes $\mathcal{T}$ that are all translates of the same polytope $T$. We consider two problems in this paper. The first is the set cover problem where we want to select a minimal number of polytopes from the collection $\mathcal{T}$ such that their union covers all input points $P$. The second problem that we consider is finding a hitting set for the set of polytopes $\mathcal{T}$, that is, we want to select a minimal number of points from the input points $P$ such that every given polytope is hit by at least one point. We give the first constant-factor approximation algorithms for both problems. We achieve this by providing an epsilon-net for translates of a polytope in $R^3$ of size $\bigO(\frac{1{ε)$.
Selection of multiple donor gauges via Graphical Lasso for estimation of daily streamflow time series
Creators: name: Villalba, German A.
name: Liang, Xu
name: Liang, Yao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: A fundamental challenge in estimations of daily streamflow time series at sites with incomplete records is how to effectively and efficiently select reference or donor gauges from an existing gauge network to infer the missing data. While research on estimating missing streamflow time series is not new, the existing approaches either use a single reference streamflow gauge or employ a set of "ad-hoc" reference gauges, leaving a systematic selection of reference gauges as a long-standing open question. In this work, a novel method is introduced that facilitates systematical selection of multiple reference gauges from any given streamflow network. The idea is to mathematically characterize the network-wise correlation structure of a streamflow network via graphical Markov modeling, and further transforms a dense network into a sparsely connected one. The resulted underlying sparse graph from the graphical model encodes conditional independence conditions among all reference gauges from the streamflow network, allowing determination of an optimum subset of the donor gauges. The sparsity is discovered by using the Graphical Lasso algorithm with an L1-norm regularization parameter and a thresholding parameter. These two parameters are determined by a multi-objective optimization process. Furthermore, the graphical modeling approach is employed to solve another open problem in gauge removal planning decision (e.g., due to operation budget constraints): which gauges to remove would statistically guarantee the least loss of information by estimations from the remaining gauges? Our graphical model-based method is demonstrated with daily streamflow data from a network of 34 gauges over the Ohio River basin.
description: arXiv admin note: substantial text overlap with arXiv:2004.01373
Notebook 01 (July 1969-February 1970)
Creators: name: Hutchison, Alexander
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Literature
valueUri: http://id.worldcat.org/fast/999953
subject: Poetry, Modern
valueUri: http://id.worldcat.org/fast/1067769
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Poets, Scottish
valueUri: http://id.worldcat.org/fast/1068037
subject: Theology
valueUri: http://id.worldcat.org/fast/1149559
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: College teachers
valueUri: http://id.worldcat.org/fast/868114

description: Alexander ("Sandy") Hutchison (1943-2015) was a Scottish poet who taught at various colleges and universities on Vancouver Island between the 1960s-80s, including the Department of English at the University of Victoria in 1966. These notebooks contain content ranging from notes about/from various philosophers, to personal correspondence, to drafts of his poetry.
Paul Schneider-Gedenkgottesdienst am 18. Juli 2013 in Dickenschied Text: 1 Petr 5,6-11
Creators: name: Felten, Engelbert
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 63 Nr. 2 (2014): Ökumenische Rundschau, Band 63, Heft 2
The effect of a late decaying scalar on the neutralino relic density
Creators: name: Gelmini, Graciela
name: Gondolo, Paolo
name: Soldatenko, Adrian
name: Yaguna, Carlos E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the energy density of the Universe before nucleosynthesis is dominated by a scalar field phi that decays and reheats the plasma to a temperature T_{RH} smaller than the standard neutralino freeze out temperature, the neutralino relic density differs from its standard value. In this case, the relic density depends on two additional parameters: T_{RH}, and the number of neutralinos produced per phi decay per unit mass of the phi field. In this paper, we numerically study the neutralino relic density as a function of these reheating parameters within minimal supersymmetric standard models and show that the dark matter constraint can almost always be satisfied.
description: 16 pages, 14 figures
Features based Mammogram Image Classification using Weighted Feature Support Vector Machine
Creators: name: Kavitha, S.
name: Thyagharajan, K. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: I.2.6; I.2.10; I.4.6; I.4.7; I.4.10; I.5

description: In the existing research of mammogram image classification, either clinical data or image features of a specific type is considered along with the supervised classifiers such as Neural Network (NN) and Support Vector Machine (SVM). This paper considers automated classification of breast tissue type as benign or malignant using Weighted Feature Support Vector Machine (WFSVM) through constructing the precomputed kernel function by assigning more weight to relevant features using the principle of maximizing deviations. Initially, MIAS dataset of mammogram images is divided into training and test set, then the preprocessing techniques such as noise removal and background removal are applied to the input images and the Region of Interest (ROI) is identified. The statistical features and texture features are extracted from the ROI and the clinical features are obtained directly from the dataset. The extracted features of the training dataset are used to construct the weighted features and precomputed linear kernel for training the WFSVM, from which the training model file is created. Using this model file the kernel matrix of test samples is classified as benign or malignant. This analysis shows that the texture features have resulted in better accuracy than the other features with WFSVM and SVM. However, the number of support vectors created in WFSVM is less than the SVM classifier.
description: 9 pages, 3 figures, "submitted to International Conference on Computing and Communication Systems"
Control of decoherence in open quantum systems using feedback
Creators: name: Ganesan, Narayan
name: Tarn, Tzyh Jong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum feedback is assuming increasingly important role in quantum control and quantum information processing. In this work we analyze the application of such feedback techniques in eliminating decoherence in open quantum systems. In order to apply such system theoretic methods we first analyze the invariance properties of quadratic forms which corresponds to expected value of a measurement and present conditions for decouplability of measurement outputs of such time-varying open quantum systems from environmental effects.
description: 44th IEEE CDC-ECC conference held in Seville, Spain, 7 pages
BOLETÍN TÉCNICO JUNIO - 2024 PROCEDIMIENTO ADMINISTRATIVO SANCIONATORIO FISCAL. 2016 – 2019 / 2020 – 2023
Creators: name: JUAN SEBASTIAN, QUIJANO MENDEZ
Publisher: name: Zenodo
Year: 2024
Subjects: Procedimientos Administrativos Sancionatorios Fiscales (PASF)
PROCEDIMIENTO ADMINISTRATIVO

description: Este boletín técnico tiene como objetivo proporcionar información sobre las definiciones, leyes y cambios que tienen un impacto en los PAS en Colombia, principalmente en función de las disposiciones de la Ley 1474 de 2011, también conocida como el Estatuto Anticorrupción.

El análisis realizado a continuación tiene en cuenta la información descargada del Sistema de Información Administrativo (SIA) Misional del periodo 2020 al 2023.

La primera toma como referencia los años 2016-2019, mientras que la segunda toma como referencia los años 2020-2023.
Understanding Visual Saliency in Mobile User Interfaces
Creators: name: Leiva, Luis A.
name: Xue, Yunfei
name: Bansal, Avya
name: Tavakoli, Hamed R.
name: Köroğlu, Tuğçe
name: Dayama, Niraj R.
name: Oulasvirta, Antti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: For graphical user interface (UI) design, it is important to understand what attracts visual attention. While previous work on saliency has focused on desktop and web-based UIs, mobile app UIs differ from these in several respects. We present findings from a controlled study with 30 participants and 193 mobile UIs. The results speak to a role of expectations in guiding where users look at. Strong bias toward the top-left corner of the display, text, and images was evident, while bottom-up features such as color or size affected saliency less. Classic, parameter-free saliency models showed a weak fit with the data, and data-driven models improved significantly when trained specifically on this dataset (e.g., NSS rose from 0.66 to 0.84). We also release the first annotated dataset for investigating visual saliency in mobile UIs.
2006 Safety Belt Usage Survey in Kentucky
Creators: name: Agent, Kenneth R.
name: Green, Eric R.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2006
Subjects: subject: Transportation Engineering

description: The objective of this study was to establish 2006 safety belt and child safety seat usage rates in Kentucky. The 2006 survey continues to document the results after enactment of the original “secondary enforcement” statewide mandatory safety belt law in 1994 and the change to “primary enforcement” which was enacted in 2006. Data were collected at 200 randomly selected sites spread across Kentucky. Data from the individual sites were combined into a statewide percentage considering roadway functional classification, geographic region, and vehicle miles traveled. The data show that the usage rate in 2006 (67.2 percent) was slightly higher than that in 2005 (66.7 percent). Considering data taken after the original statewide law, this compares to 66.0 in 2004, 65.5 percent in 2003, 62.0 percent in 2002, 61.9 percent in 2001, 60 percent in 2000, 59 percent in 1999, 54 percent in 1998, 1997 and 1995, 55 percent in 1996, and 58 percent in 1994. The current usage is substantially above the 1993 level, prior to enactment of the original statewide law, of 42 percent. The 2006 statewide usage rate for children under the age of four was determined to be 94.0 percent. This continues the high rate found for this age category and compares to the high of 96.0 percent in 2004. The statewide law was changed in 2006 to allow primary enforcement. An educational period will extend through December 2006 where warning citations are given. Enforcement with fines will start in January 2007. Enactment of the primary enforcement law, without education and enforcement, has not resulted in an increase in usage. To obtain the maximum possible increase in usage, enforcement accompanying publicity, must be implemented in 2007.
Best Management Practices Used by KYTC for On-Site Erosion Control
Creators: name: Allen, David L.
name: Palle, Sudhir
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2006
Subjects: subject: Transportation Engineering

description: New erosion control procedures (ECP) have recently been implemented by the Kentucky Transportation Cabinet (KYTC). Previously, consultants and designers developed the ECP as a part of the design plans. In many cases these did not work in the field. The new procedures allow construction personnel to develop and implement their own ECPs on site.  This study conducted a survey of construction personnel in the KYTC to determine their level of familiarity with the new ECPs and to determine any issues that may have developed with the new procedures. The results of the survey concluded that most KYTC construction personnel were somewhat familiar with the new ECPs. Most respondents to the survey did not indicate any major issues with the ECPs. However, most respondents indicated they would like to have more training.  It was recommended that an additional survey be conducted, in the future, two or three years after implementation of these new ECPs to determine if additional changes need to be made. It was further recommended that all new construction personnel be required to be trained in the new ECPs.
Evaluation of laboratory and on-farm tests to estimate colostrum quality for dairy cows
Creators: name: Röder, M.
name: Borchardt, S.
name: Heuwieser, W.
name: Rauch, E.
name: Sargent, R.
name: Sutter, F.
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: colostrum quality
subject: on-farm test
subject: colostrum management
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: The objectives of this study were to evaluate different analytical methods to determine colostrum quality in dairy cattle, including one laboratory-based method (ELISA) and 4 on-farm tests. We hypothesized that the colostral IgG concentration using different analytical methods, such as ELISA (mg/mL), digital Brix refractometer (% Brix), colostrometer (specific gravity and mg/mL), an outflow funnel (seconds), and a lateral flow assay (mg/mL), were highly correlated with the reference method, radial immunodiffusion (RID; mg/mL) and would generate comparable results. Colostrum samples were collected from 209 Holstein Friesian cows on 2 commercial dairy farms in Germany. Colostrum weight and colostrum temperature were measured. Test characteristics, such as optimum thresholds, sensitivity, specificity, and area under the curve (AUC) were determined using a receiver operating characteristic curve analyses for each test. Out of 209 colostrum samples assessed by RID, 186 (89%) samples had high quality (≥50 mg IgG/mL), while 23 colostrum samples (11%) showed poor quality with IgG concentrations less than 50 mg/mL. The mean IgG concentration (±SD) was 101.3 ± 45.9 mg/mL and the range was 6.0 to 244.3 mg/mL. The Pearson correlation coefficient (r) between RID and ELISA was r = 0.78. In comparison to RID, Pearson correlation coefficients for the on-farm tests were: r = 0.79 (digital Brix refractometry), r = 0.58 (colostrometer: specific gravity), r = 0.61 (colostrometer: temperature corrected), r = 0.26 (outflow funnel) and r = 0.43 (lateral flow assay), respectively. The optimal threshold to identify high-quality colostrum using ELISA was 50.8 mg/mL with sensitivity 91.3%, specificity 92.3%, and AUC of 0.94. For the on-farm tests sensitivity ranged from 95.7% (Brix refractometry) to 60.9% (lateral flow assay). Specificity ranged from 88.6% (lateral flow assay) to 75.9% (colostrometer: temperature corrected). The AUC ranged from 0.93 (Brix refractometry) to 0.73 (outflow funnel). Based on the AUC, ELISA (0.94) and Brix refractometry (0.93) can be considered highly accurate. In conclusion, the ELISA is accurate to assess colostrum quality. Regarding the on-farm tests only the digital Brix refractometer and the colostrometer were adequate to determine colostrum quality.
Effective separation of photogenerated electron-hole pairs by radial field facilitates ultrahigh photoresponse in single semiconductor nanowire photodetectors
Creators: name: Sett, Shaili
name: Raychaudhuri, Arup Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report an investigation on the observation of ultrahigh photoresponse (photogain, G_Pc>106) in single nanowire photodetectors of diameter < 100 nm. The investigation which is a combination of experimental observations and a theoretical analysis of the ultrahigh optical response of semiconductor nanowires, has been carried out with emphasis on Ge nanowires. Semiconductor nanowire photodetectors show a signature of photogating where G_Pc rolls-off with increasing illumination intensity. We show that surface band bending due to depleted surface layers in nanowires induces a strong radial field (~ 108 V/m at the nanowire surface) which causes physical separation of photogenerated electron-hole pairs. This was established quantitatively through a self-consistent theoretical model based on coupled Schrodinger and Poisson Equations. It shows that carrier separation slows down the surface recombination velocity to a low value (< 1 cm/s) thus reducing the carrier recombination rate and extending the recombination lifetime by few orders of magnitude. An important outcome of the model is the prediction of G_Pc ~ 106 in a single Ge nanowire (with diameter 60 nm), which matches well with our experimental observation. The model also shows an inverse dependence of G_Pc on the diameter that has been observed experimentally. Though carried out in context of Ge nanowires, the physical model developed has general applicability in other semiconductor nanowires as well.
description: 26 pages 6 figures supporting data included
Propagation of ultra-high energy neutrinos in the cosmic neutrino background
Creators: name: Van Elewyck, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: UHE cosmic neutrino interaction with the cosmic neutrino background (CnuB) is expected to produce absorption dips in the UHE neutrino flux at energies above the threshold for Z-boson resonant production. The observation of these dips would constitute an evidence for the existence of the CnuB; they could also be used to determine the value of the relic neutrino masses as well as some features of the population of UHE neutrino sources. After breafly discussing the current prospects for relic neutrino spectroscopy, we present a calculation of the UHE neutrino transmission probability based on finite-temperature field theory which takes into account the thermal motion of the relic neutrinos. We then compare our results with the approximate expressions existing in the literature and discuss the influence of thermal effects on the absorption dips in the context of realistic UHE neutrino fluxes and favoured neutrino mass schemes.
description: 8 pages, 5 figures. Prepared for the Cosmic Ray International Seminar (CRIS 2006) on UHECR: Status and Perspectives, Catania, Italy, May 29 - June 2, 2006
Supplementary document for Evaluation and analysis of the electro-optic effect and the Stark effect in electro-optic polymers by the simple transmission measurement technique without an aperture - 7224895.pdf
Creators: name: Yamada, Toshiki
name: Otomo, Akira
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Analysis of the electro-optic effect and the Stark effect in electro-optic polymers by the simple transmission measurement technique without an aperture
Compatibility of Shelah and Stupp's and Muchnik's iteration with fragments of monadic second order logic
Creators: name: Kuske, Dietrich
Publisher: name: arXiv
Year: 2008
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We investigate the relation between the theory of the iterations in the sense of Shelah-Stupp and of Muchnik, resp., and the theory of the base structure for several logics. These logics are obtained from the restriction of set quantification in monadic second order logic to certain subsets like, e.g., finite sets, chains, and finite unions of chains. We show that these theories of the Shelah-Stupp iteration can be reduced to corresponding theories of the base structure. This fails for Muchnik's iteration.
Supplementary document for Evaluation and analysis of the electro-optic effect and the Stark effect in electro-optic polymers by the simple transmission measurement technique without an aperture - 7232547.pdf
Creators: name: Yamada, Toshiki
name: Otomo, Akira
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Analysis of the electro-optic effect and the Stark effect in electro-optic polymers by the simple transmission measurement technique without an aperture
Polyglycerol-Based Hydrogel as Versatile Support Matrix for 3D Multicellular Tumor Spheroid Formation
Creators: name: Thongrom, Boonya
name: Tang, Peng
name: Arora, Smriti
name: Haag, Rainer
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: polyglycerol-based hydrogel
subject: thiol-Michael click reaction
subject: stiffness
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Hydrogel-based artificial scaffolds are essential for advancing cell culture models from 2D to 3D, enabling a more realistic representation of physiological conditions. These hydrogels can be customized through crosslinking to mimic the extracellular matrix. While the impact of extracellular matrix scaffolds on cell behavior is widely acknowledged, mechanosensing has become a crucial factor in regulating various cellular functions. cancer cells’ malignant properties depend on mechanical cues from their microenvironment, including factors like stiffness, shear stress, and pressure. Developing hydrogels capable of modulating stiffness holds great promise for better understanding cell behavior under distinct mechanical stress stimuli. In this study, we aim to 3D culture various cancer cell lines, including MCF-7, HT-29, HeLa, A549, BT-474, and SK-BR-3. We utilize a non-degradable hydrogel formed from alpha acrylate-functionalized dendritic polyglycerol (dPG) and thiol-functionalized 4-arm polyethylene glycol (PEG) via the thiol-Michael click reaction. Due to its high multivalent hydroxy groups and bioinert ether backbone, dPG polymer was an excellent alternative as a crosslinking hub and is highly compatible with living microorganisms. The rheological viscoelasticity of the hydrogels is tailored to achieve a mechanical stiffness of approximately 1 kPa, suitable for cell growth. Cancer cells are in situ encapsulated within these 3D network hydrogels and cultured with cell media. The grown tumor spheroids were characterized by fluorescence and confocal microscopies. The average grown size of all tumoroid types was ca. 150 µm after 25 days of incubation. Besides, the stability of a swollen gel remains constant after 2 months at physiological conditions, highlighting the nondegradable potential. The successful formation of multicellular tumor spheroids (MCTSs) for all cancer cell types demonstrates the versatility of our hydrogel platform in 3D cell growth.
New Combinatorial Complete One-Way Functions
Creators: name: Kojevnikov, Arist
name: Nikolenko, Sergey I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Complexity (cs.CC)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In 2003, Leonid A. Levin presented the idea of a combinatorial complete one-way function and a sketch of the proof that Tiling represents such a function. In this paper, we present two new one-way functions based on semi-Thue string rewriting systems and a version of the Post Correspondence Problem and prove their completeness. Besides, we present an alternative proof of Levin's result. We also discuss the properties a combinatorial problem should have in order to hold a complete one-way function.
Radial oscillations and tidal Love numbers of dark energy stars
Creators: name: Panotopoulos, Grigoris
name: Rincon, Angel
name: Lopes, Ilidio
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the properties of relativistic stars made of dark energy. We model stellar structure assuming i) isotropic perfect fluid and ii) a dark energy inspired equation of state, the generalized equation of state of Chaplygin gas, as we will be calling it. The mass-to-radius profiles, the tidal Love numbers as well as the ten lowest radial oscillation modes are computed. Causality, stability and energy conditions are also discussed.
description: 7 pages, 2 tables, 4 figures, to appear in EPJ Plus