cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The use of antimalarial antibodies to measure malaria transmission in low transmission and pre-elimination settings
Creators: name: Van den Hoogen, LL
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2019

description: Global declines in malaria transmission in recent years have refocused efforts towards elimination. An essential part of this effort is adequate detection of transmission patterns. However, meta-analyses have shown that microscopy detects about half of all polymerase chain reaction (PCR)-confirmed infections. To date, the performance of rapid diagnostic tests (RDTs) relative to microscopy and PCR has not been evaluated in a comprehensive meta-analysis. Therefore, the relationship between PCR, RDT and microscopy prevalence estimates in asymptomatic populations was determined using data from cross-sectional surveys in endemic settings (Chapter 3). Overall, RDTs detected 41% of all PCR-confirmed infections, and RDT-undetected (i.e. low-density) infections increased with age and decreasing transmission intensity. Another approach to estimate transmission is to use malaria-specific immune responses of resident populations as a measure of exposure to infection. Antimalarial antibodies, in combination with age, reflect both historical and recent exposure. Until recently, the majority of sero-surveillance data were based on a few well-characterised antigens using enzyme-linked immunosorbent assays (ELISA). However, which antibodies most accurately reflect exposure to recent low-density infections remains largely unknown. To address this, Chapter 4 examined antibody responses in previously naïve, controlled human malaria infections (CHMI) participants using protein microarray. Nearly all participants showed measurable antibody responses to a subset of four antigens one month post-CHMI. In addition to protein microarray, multiplex bead assays (MBAs) enable multiplex detection of antibodies. However, MBA protocols may require further adaptation in scenarios where results must be readily available to inform control and elimination policies. The precision of an adapted MBA protocol with improved throughput and ease-of-use was determined in Chapter 5 using data collected in three large-scale transmission surveys. For some antigens, inter-plate variability seemed to increase during the third survey, possibly due to long-term storage of reagents. Commercially available ELISAs are standardised in their production and have been used to test blood products prior to donation to reduce the risk of transfusion-transmitted malaria. However, their performance in an epidemiological context has not been investigated. In Chapter 6, one of five commercially available ELISAs evaluated, accurately described transmission in a low transmission and pre-elimination setting. A low-cost, high-throughput assay for which results are readily interpretable may help to directly inform control activities targeting areas with remaining transmission.
Deep Representational Similarity Learning for analyzing neural signatures in task-based fMRI dataset
Creators: name: Yousefnezhad, Muhammad
name: Sawalha, Jeffrey
name: Selvitella, Alessandro
name: Zhang, Daoqiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Similarity analysis is one of the crucial steps in most fMRI studies. Representational Similarity Analysis (RSA) can measure similarities of neural signatures generated by different cognitive states. This paper develops Deep Representational Similarity Learning (DRSL), a deep extension of RSA that is appropriate for analyzing similarities between various cognitive tasks in fMRI datasets with a large number of subjects, and high-dimensionality -- such as whole-brain images. Unlike the previous methods, DRSL is not limited by a linear transformation or a restricted fixed nonlinear kernel function -- such as Gaussian kernel. DRSL utilizes a multi-layer neural network for mapping neural responses to linear space, where this network can implement a customized nonlinear transformation for each subject separately. Furthermore, utilizing a gradient-based optimization in DRSL can significantly reduce runtime of analysis on large datasets because it uses a batch of samples in each iteration rather than all neural responses to find an optimal solution. Empirical studies on multi-subject fMRI datasets with various tasks -- including visual stimuli, decision making, flavor, and working memory -- confirm that the proposed method achieves superior performance to other state-of-the-art RSA algorithms.
description: Neuroinformatics
Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B^0 \to (ρπ)^0 and a Constraint on the Quark Mixing Matrix Angle ϕ_2
Creators: name: The Belle Collaboration
name: Kusaka, A.
name: Wang, C. C.
name: Ishino, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0 --> pi+pi-pi0 decays based on a 414/fb data sample containing 449M BB pairs. The data was collected on the $Υ$(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle $ϕ_2$, 68 deg. < $ϕ_2$ < 95 deg. as the 68.3% confidence interval for the $ϕ_2$ solution consistent with the standard model (SM). A large SM-disfavored region also remains.
description: 6 pages, 3 figures, to be submitted to PRL; modification to PRL published version, no essential change in the contents
Random matrix theory analysis of a temperature-related transformation in statistics of Fano-Feshbach resonances in Thulium atoms
Creators: name: Davletov, E. T.
name: Tsyganok, V. V.
name: Khlebnikov, V. A.
name: Pershin, D. A.
name: Akimov, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Recently, transformation from random to chaotic behavior in the statistics of Fano-Feshbach resonances was observed in thulium atoms with rising ensemble temperature. We performed random matrix theory simulations of such spectra and analyzed the resulting statistics. Our simulations show that, when evaluated in terms of the Brody parameter, resonance statistics do not change or change insignificantly with rising temperature if temperature is the only changing parameter. In the experiments evaluated, temperature was changed simultaneously with optical dipole trap depth. Thus, simulations included the Stark shift based on the known polarizability of the free atoms and assuming their polarizability remains the same in the bound state. Somewhat surprisingly, we found that, while including the Stark shift does lead to minor statistical changes, it does not change the resonance statistics and, therefore, is not responsible for the experimentally observed statistic transformation. This observation suggests that either our assumption regarding the polarizability of Feshbach molecules is poor or that an additional mechanism changes the statistics and leads to more chaotic statistical behavior.
ปัจจัยที่ส่งผลต่อวัฒนธรรมการมีส่วนร่วมทางการเมืองของประชาชนในองค์การบริหารส่วนตำบล อำเภอเมืองฉะเชิงเทรา จังหวัดฉะเชิงเทรา
Creators: name: วิลาวัลย์ ศรีสว่าง
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: วัฒนธรรมการมีส่วนร่วมทางการเมือง, การมีส่วนร่วมทางการเมือง, ปัจจัยที่ส่งผลต่อวัฒนธรรมการมีส่วนร่วมทางการเมือง (Political participation culture, Political participation, Political participation factors)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 191-202
Mixed Action Simulations on Staggered Background; Interpretation and Result for the 2-flavor QCD Chiral Condensate
Creators: name: Hasenfratz, Anna
name: Hoffmann, Roland
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Growing evidence indicates that in the continuum limit the rooted staggered action is in the correct QCD universality class, the non-local terms arising from taste breaking can be viewed as lattice artifacts. In this paper we consider the 2-flavor Asqtad staggered action at a lattice spacing of approximately 0.13 fm and probe the properties of the staggered configurations by an overlap valence Dirac operator. By comparing the distribution of the overlap eigenmodes to continuum QCD predictions we investigate if/when the lattice artifacts are small as a function of the staggered quark mass. We define a matching overlap quark mass where the lattice corrections are minimal for the topological susceptibility and from the eigenmode distribution we predict the 2-flavor chiral condensate. Our results indicate that the staggered configurations are consistent with 2-flavor continuum QCD up to small lattice artifacts, and predict a consistent value for the infinite volume chiral condensate.
description: 12 pages, 6 figures, REVTeX4
How Did the IGM Become Enriched?
Creators: name: Aguirre, Anthony
name: Schaye, Joop
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The enrichment of the intergalactic medium with heavy elements is a process that lies at the nexus of poorly-understood aspects of physical cosmology. We review current understanding of the processes that may remove metals from galaxies, the basic predictions of these models, the key observational constraints on enrichment, and how intergalactic enrichment may be used to test cosmological simulations.
description: 12 pages; To appear in the proceedings of the CRAL-Conference Series I "Chemodynamics: from first stars to local galaxies", Lyon 10-14 July 2006, France, Eds. Emsellem, Wozniak, Massacrier, Gonzalez, Devriendt, Champavert, EAS Publications Series
A functorial LMO invariant for Lagrangian cobordisms
Creators: name: Cheptea, Dorin
name: Habiro, Kazuo
name: Massuyeau, Gwenael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57M27, 57M25

description: Lagrangian cobordisms are three-dimensional compact oriented cobordisms between once-punctured surfaces, subject to some homological conditions. We extend the Le-Murakami-Ohtsuki invariant of homology three-spheres to a functor from the category of Lagrangian cobordisms to a certain category of Jacobi diagrams. We prove some properties of this functorial LMO invariant, including its universality among rational finite-type invariants of Lagrangian cobordisms. Finally, we apply the LMO functor to the study of homology cylinders from the point of view of their finite-type invariants.
description: 59 pages with many figures. Some minor changes in the writing, and a few precisions added
Pulse-shape calculations and applications using the AGATAGeFEM software package
Creators: name: Ljungvall, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A software package for modeling segmented High-Purity Segmented Germanium detectors, AGATAGeFEM, is presented. The choices made for geometry implementation and the calculations of the electric and weighting fields are discussed. Models used for charge-carrier velocities are described. Numerical integration of the charge-carrier transport equation is explained. Impact of noise and crosstalk on the achieved position resolution in AGATA detectors are investigated. The results suggest that crosstalk as seen in the AGATA detectors is of minor importance for the position resolution. The sensitivity of the pulse shapes to the parameters in the pulse-shape calculations is determined, this as a function of position in the detectors. Finally, AGATAGeFEM has been used to produce pulse-shape data bases for pulse-shape analyses of experimental data. The results with the new data base indicate improvement with respect to those with the standard AGATA data base.
description: To be submitted, prepared for EPJA
Women and environmental decision-making : A case study of the Squamish estuary management plan in British Columbia, Canada
Creators: name: Avis, Wendy
Publisher: name: University of British Columbia
Year: 2009

description: An analysis of the literature on sustainability reveals that community decision making is an important component in the definition and implementation of sustainability. Although the importance of participation by all members of a community is stressed in the literature, analysis of marginalized groups focuses mainly on class and culture. When gender lines are explored, it is mostly within the context of the developing world. The purpose of this research was to examine the nature of women's participation in defining and implementing sustainability. This exploration had three objectives: to define effective public participation in the context of local level environmental decision making, to identify barriers to women inherent in public participation processes associated with environmental planning decisions and to make recommendations which eliminate barriers to women's participation in planning decisions. Barriers to women's participation were divided into three categories: institutional, community and societal. This research used a case study approach with multiple sources of evidence to examine these barriers. The public participation process involved in developing the Squamish Estuary Management Plan was analyzed to explore the nature and extent of women's participation. Research methods included document and newspaper coverage analysis, interviews and workshops. These revealed that specific barriers exist which discourage and prevent women from participating in planning decisions. At an institutional level, these included lack of trust, centralized decision-making, poor communication structures, an atmosphere that was not childfriendly and the failure to present the Plan in a way which was relevant to women's lives. Community barriers consisted of the fear of retaliation and the large number of community issues. Societal barriers identified were the devaluing of women's voices, level of income and the restrictions caused by women's societal roles. These barriers reduced the effectiveness of the public participation process. Results were used to develop a series of recommendations about how to encourage women's participation in decision-making, ensuring that women in communities are involved in shaping and defining sustainability.
ZZM20-Levumi N2. Tests zu Rechenoperationen als Lernverlaufsdiagnostik „Zahlzerlegung (Zahlenraum 20)“ der Onlineplattform www.levumi.de
Creators: name: Anderson, Sven
name: Gebhardt, Markus
Publisher: name: Universität Regensburg
Year: 2021
Subjects: subject: Zahlzerlegen, Mathematiktest, Rechentest, Lernverlaufsdiagnostik
subject: 370 Erziehung, Schul- und Bildungswesen

description: Die Onlineplattform Levumi (www.levumi.de; Gebhardt, Diehl & Mühling, 2016) bietet Tests zur Lernverlaufsdiagnostik in den Lernbereichen Lesen (Jungjohann, Diehl et al., 2018, Jungjohann, DeVries et al., 2018), Rechtschreiben (Jungjohann et al., 2019) sowie Mathematik. Alle Tests können als Basis für eine datenbasierte Förderplanung und zur Gestaltung von adaptiven Förderungen auch im inklusiven Unterricht genutzt werden (Anderson et al., 2021, Jungjohann et al., 2021). Der Bereich Mathematik ist um das Testverfahren Zahlzerlegung (Zahlenraum 1 – 20) erweitert. Der Test beinhaltet Aufgaben zu Teil-Ganzes-Beziehungen. Die Anforderung des Tests besteht jeweils darin, innerhalb eines Zahlentripels die fehlende Teilmenge bei gegebenen Ganzen und einer gegebenen Teilmenge zu ermitteln. Im Folgenden wird ein kurzer Einblick in die Konzeption des Testverfahrens und deren Umsetzung auf der Onlineplattform Levumi gegeben. Für einen Einsatz als Printversion sind dem Dokument im Anhang drei parallele Testversionen angehängt (Versionen 1–3).
SoK: Exploring the State of the Art and the Future Potential of Artificial Intelligence in Digital Forensic Investigation
Creators: name: Du, Xiaoyu
name: Hargreaves, Chris
name: Sheppard, John
name: Anda, Felix
name: Sayakkara, Asanka
name: Le-Khac, Nhien-An
name: Scanlon, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Multi-year digital forensic backlogs have become commonplace in law enforcement agencies throughout the globe. Digital forensic investigators are overloaded with the volume of cases requiring their expertise compounded by the volume of data to be processed. Artificial intelligence is often seen as the solution to many big data problems. This paper summarises existing artificial intelligence based tools and approaches in digital forensics. Automated evidence processing leveraging artificial intelligence based techniques shows great promise in expediting the digital forensic analysis process while increasing case processing capacities. For each application of artificial intelligence highlighted, a number of current challenges and future potential impact is discussed.
Space-time extensions II
Creators: name: Rácz, István
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The global extendibility of smooth causal geodesically incomplete spacetimes is investigated. Denote by $γ$ one of the incomplete non-extendible causal geodesics of a causal geodesically incomplete spacetime $(M,g_{ab})$. First, it is shown that it is always possible to select a synchronised family of causal geodesics $Γ$ and an open neighbourhood $\mathcal{U}$ of a final segment of $γ$ in $M$ such that $\mathcal{U}$ is comprised by members of $Γ$, and suitable local coordinates can be defined everywhere on $\mathcal{U}$ provided that $γ$ does not terminate either on a tidal force tensor singularity or on a topological singularity. It is also shown that if, in addition, the spacetime, $(M,g_{ab})$, is globally hyperbolic, and the components of the curvature tensor, and its covariant derivatives up to order $k-1$ are bounded on $\mathcal{U}$, and also the line integrals of the components of the $k^{th}$-order covariant derivatives are finite along the members of $Γ$---where all the components are meant to be registered with respect to a synchronised frame field on $\mathcal{U}$---then there exists a $C^{k-}$ extension $Φ: (M,g_{ab}) \rightarrow (\widehat{M},\widehat{g}_{ab})$ so that for each $\barγ\inΓ$, which is inextendible in $(M,g_{ab})$, the image, $Φ\circ\barγ$, is extendible in $(\widehat{M},\widehat{g}_{ab})$. Finally, it is also proved that whenever $γ$ does terminate on a topological singularity $(M,g_{ab})$ cannot be generic.
description: 42 pages, no figures, small changes to match the published version
Algorithms and Hardness for Multidimensional Range Updates and Queries
Creators: name: Lau, Joshua
name: Ritossa, Angus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: E.1; F.2.2; G.2.2

description: Traditional orthogonal range problems allow queries over a static set of points, each with some value. Dynamic variants allow points to be added or removed, one at a time. To support more powerful updates, we introduce the Grid Range class of data structure problems over integer arrays in one or more dimensions. These problems allow range updates (such as filling all cells in a range with a constant) and queries (such as finding the sum or maximum of values in a range). In this work, we consider these operations along with updates that replace each cell in a range with the minimum, maximum, or sum of its existing value, and a constant. In one dimension, it is known that segment trees can be leveraged to facilitate any $n$ of these operations in $\tilde{O}(n)$ time overall. Other than a few specific cases, until now, higher dimensional variants have been largely unexplored. We show that no truly subquadratic time algorithm can support certain pairs of these updates simultaneously without falsifying several popular conjectures. On the positive side, we show that truly subquadratic algorithms can be obtained for variants induced by other subsets. We provide two approaches to designing such algorithms that can be generalised to online and higher dimensional settings. First, we give almost-tight $\tilde{O}(n^{3/2})$ time algorithms for single-update variants where the update operation distributes over the query operation. Second, for other variants, we provide a general framework for reducing to instances with a special geometry. Using this, we show that $O(m^{3/2-ε})$ time algorithms for counting paths and walks of length 2 and 3 between vertex pairs in sparse graphs imply truly subquadratic data structures for certain variants; to this end, we give an $\tilde{O}(m^{(4ω-1)/(2ω+1)}) = O(m^{1.478})$ time algorithm for counting simple 3-paths between vertex pairs.
description: 38 pages, 3 figures, 1 table. Full version of paper to appear in ITCS 2021. Abstract abridged for arXiv limits
Synchronizer-Free Digital Link Controller
Creators: name: Bund, Johannes
name: Függer, Matthias
name: Lenzen, Christoph
name: Medina, Moti
Publisher: name: arXiv
Year: 2020
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: This work presents a producer-consumer link between two independent clock domains. The link allows for metastability-free, low-latency, high-throughput communication by slight adjustments to the clock frequencies of the producer and consumer domains steered by a controller circuit. Any such controller cannot deterministically avoid, detect, nor resolve metastability. Typically, this is addressed by synchronizers, incurring a larger dead time in the control loop. We follow the approach of Friedrichs et al. (TC 2018) who proposed metastability-containing circuits. The result is a simple control circuit that may become metastable, yet deterministically avoids buffer underrun or overflow. More specifically, the controller output may become metastable, but this may only affect oscillator speeds within specific bounds. In contrast, communication is guaranteed to remain metastability-free. We formally prove correctness of the producer-consumer link and a possible implementation that has only small overhead. With SPICE simulations of the proposed implementation we further substantiate our claims. The simulation uses 65nm process running at roughly 2GHz.
description: 12 page journal article
Dwarf-spheroidal satellites: are they of tidal origin?
Creators: name: Metz, M.
name: Kroupa, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Milky Way and Andromeda must have formed through an initial epoch of sub-structure merging. As a result of fundamental physical conservation laws tidal-dwarf galaxies (TDGs) have likely been produced. Here we show that such TDGs appear, after a Hubble-time of dynamical evolution in the host dark-matter halo, as objects that resemble known dSph satellite galaxies. We discuss the possibility that some of the Milky Way's satellites may be of tidal origin.
description: 7 pages, 3 figures; acc. for pub. in MNRAS
Clustering in VANET: Algorithms and Challenges
Creators: name: Mukhtaruzzaman, Mohammad
name: Atiquzzaman, Mohammed
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Clustering is an important concept in vehicular ad hoc network (VANET) where several vehicles join to form a group based on common features. Mobility-based clustering strategies are the most common in VANET clustering; however, machine learning and fuzzy logic algorithms are also the basis of many VANET clustering algorithms. Some VANET clustering algorithms integrate machine learning and fuzzy logic algorithms to make the cluster more stable and efficient. Network mobility (NEMO) and multi-hop-based strategies are also used for VANET clustering. Mobility and some other clustering strategies are presented in the existing literature reviews; however, extensive study of intelligence-based, mobility-based, and multi-hop-based strategies still missing in the VANET clustering reviews. In this paper, we presented a classification of intelligence-based clustering algorithms, mobility-based algorithms, and multi-hop-based algorithms with an analysis on the mobility metrics, evaluation criteria, challenges, and future directions of machine learning, fuzzy logic, mobility, NEMO, and multi-hop clustering algorithms.
A new bridge between leptonic CP violation and leptogenesis
Creators: name: Branco, G. C.
name: Felipe, R. Gonzalez
name: Joaquim, F. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Flavor effects due to lepton interactions in the early Universe may have played an important role in the generation of the cosmological baryon asymmetry through leptogenesis. If the only source of high-energy CP violation comes from the left-handed leptonic sector, then it is possible to establish a bridge between flavored leptogenesis and low-energy leptonic CP violation. We explore this connection taking into account our present knowledge about low-energy neutrino parameters and the matter-antimatter asymmetry observed in the Universe. In this framework, we find that leptogenesis favors a hierarchical light neutrino mass spectrum, while for quasi-degenerate and inverted hierarchical neutrino masses there is a very narrow allowed window. The absolute neutrino mass scale turns out to be m < 0.1 eV.
description: 10 pages, 3 figures
Relationship between Student Engagement and Performance in e-Learning Environment Using Association Rules
Creators: name: Moubayed, Abdallah
name: Injadat, MohammadNoor
name: Shami, Abdallah
name: Lutfiyya, Hanan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The field of e-learning has emerged as a topic of interest in academia due to the increased ease of accessing the Internet using using smart-phones and wireless devices. One of the challenges facing e-learning platforms is how to keep students motivated and engaged. Moreover, it is also crucial to identify the students that might need help in order to make sure their academic performance doesn't suffer. To that end, this paper tries to investigate the relationship between student engagement and their academic performance. Apriori association rules algorithm is used to derive a set of rules that relate student engagement to academic performance. Experimental results' analysis done using confidence and lift metrics show that a positive correlation exists between students' engagement level and their academic performance in a blended e-learning environment. In particular, it is shown that higher engagement often leads to better academic performance. This cements the previous work that linked engagement and academic performance in traditional classrooms.
description: 1 Table, 1 Figure, published in 2018 IEEE World Engineering Education Conference (EDUNINE)
Effect of the modified Heisenberg algebra on the Black hole thermodynamics
Creators: name: Hamil, B.
name: Lütfüoğlu, B. C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this letter, we introduce two new forms of uncertainty relations by extending the usual Heisenberg algebra with higher terms. Within these scenarios, at first, we study on the Unruh temperature. We find that the Unruh temperature increases in one of the new forms while it decreases in the other form. Next, we explore the thermodynamic properties of a Schwarzschild black hole by relying on these two new forms of the Heisenberg uncertainty relation. We present the modifications in the mass-temperature, specific heat, and entropy functions of the black hole according to the extension parameters.
description: 11 pages, 7 figures
Evolution of Class0 protostars: Models vs. Observations
Creators: name: Froebrich, D.
name: Schmeja, S.
name: Smith, M. D.
name: Klessen, R. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The rates at which mass accumulates into protostellar cores can now be predicted in numerical simulations. Our purpose here is to develop methods to compare the statistical properties of the predicted protostars with the observable parameters. This requires (1) an evolutionary scheme to convert numerically-derived mass accretion rates into evolutionary tracks and (2) a technique to compare the tracks to the observed statistics of protostars. Here, we use a 3D-Kolmogorov-Smirnov test to quantitatively compare model evolutionary tracks and observations of Class0 protostars. We find that the wide range of accretion functions and timescales associated with gravoturbulent simulations naturally overcome difficulties associated with schemes that use a fixed accretion pattern. This implies that the location of a protostar on an evolutionary track does not precisely determine the present age or final accrued mass. Rather, we find that predictions of the final mass for protostars from observed Tbol-Lbol values are uncertain by a factor of two and that the bolometric temperature is not always a reliable measure of the evolutionary stage. Furthermore, we constrain several parameters of the evolutionary scheme and estimate a lifetime of Class0 sources of 2-6*10^4yrs, which is related to the local free-fall time and thus to the local density at the onset of the collapse. Models with Mach numbers smaller than six are found to best explain the observational data. Generally, only a probability of 70% was found that our models explain the current observations. This is caused by not well understood selection effects in the observational sample and the simplified assumptions in the models.
description: 13 pages, 3 figures, 2 tables, accepted for publication in MNRAS
Some results on cosymplectic manifolds
Creators: name: Fino, Anna
name: Vezzoni, Luigi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C15, 53C12, 22E25

description: We obtain a generalization of the Kodaira-Morrow stability theorem for cosymplectic structures. We investigate cosymplectic geometry on Lie groups and on their compact quotients by uniform discrete subgroups. In this way we show that a compact solvmanifold admits a cosymplectic structure if and only if it is a finite quotient of a torus.
description: 19 pages, final version to appear in Geometriae Dedicata
Automatic segmentation of CT images for ventral body composition analysis
Creators: name: Fu, Yabo
name: Ippolito, Joseph E.
name: Ludwig, Daniel R.
name: Nizamuddin, Rehan
name: Li, Harold H.
name: Yang, Deshan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Purpose: Body composition is known to be associated with many diseases including diabetes, cancers and cardiovascular diseases. In this paper, we developed a fully automatic body tissue decomposition procedure to segment three major compartments that are related to body composition analysis - subcutaneous adipose tissue (SAT), visceral adipose tissue (VAT) and muscle. Three additional compartments - the ventral cavity, lung and bones were also segmented during the segmentation process to assist segmentation of the major compartments. Methods: A convolutional neural network (CNN) model with densely connected layers was developed to perform ventral cavity segmentation. An image processing workflow was developed to segment the ventral cavity in any patient's CT using the CNN model, then further segment the body tissue into multiple compartments using hysteresis thresholding followed by morphological operations. It is important to segment ventral cavity firstly to allow accurate separation of compartments with similar Hounsfield unit (HU) inside and outside the ventral cavity. Results: The ventral cavity segmentation CNN model was trained and tested with manually labelled ventral cavities in 60 CTs. Dice scores (mean +/- standard deviation) for ventral cavity segmentation were 0.966+/-0.012. Tested on CT datasets with intravenous (IV) and oral contrast, the Dice scores were 0.96+/-0.02, 0.94+/-0.06, 0.96+/-0.04, 0.95+/-0.04 and 0.99+/-0.01 for bone, VAT, SAT, muscle and lung, respectively. The respective Dice scores were 0.97+/-0.02, 0.94+/-0.07, 0.93+/-0.06, 0.91+/-0.04 and 0.99+/-0.01 for non-contrast CT datasets. Conclusion: A body tissue decomposition procedure was developed to automatically segment multiple compartments of the ventral body. The proposed method enables fully automated quantification of 3D ventral body composition metrics from CT images.
ELTs Adaptive Optics for Multi-Objects 3D Spectroscopy : Key Parameters and Design Rules
Creators: name: Neichel, B.
name: Conan, J-M.
name: Fusco, T.
name: Gendron, E.
name: Puech, M.
name: Rousset, G.
name: Hammer, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the last few years, new Adaptive Optics [AO] techniques have emerged to answer new astronomical challenges: Ground-Layer AO [GLAO] and Multi-Conjugate AO [MCAO] to access a wider Field of View [FoV], Multi-Object AO [MOAO] for the simultaneous observation of several faint galaxies, eXtreme AO [XAO] for the detection of faint companions. In this paper, we focus our study to one of these applications : high red-shift galaxy observations using MOAO techniques in the framework of Extremely Large Telescopes [ELTs]. We present the high-level specifications of a dedicated instrument. We choose to describe the scientific requirements with the following criteria : 40% of Ensquared Energy [EE] in H band (1.65um) and in an aperture size from 25 to 150 mas. Considering these specifications we investigate different AO solutions thanks to Fourier based simulations. Sky Coverage [SC] is computed for Natural and Laser Guide Stars [NGS, LGS] systems. We show that specifications are met for NGS-based systems at the cost of an extremely low SC. For the LGS approach, the option of low order correction with a faint NGS is discussed. We demonstrate that, this last solution allows the scientific requirements to be met together with a quasi full SC.
description: 15 pges, 14 figures, presented at SPIE Astronomical Telescopes and Instrumentation, 24 - 31 May 2006, Orlando, Florida USA
Nonequilibrium Kondo problem with spin-dependent chemical potentials: Exact results
Creators: name: Katsura, Hosho
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We give a brief review of the Kondo effect and exactly solve the nonequilibrium Kondo problem at the special point in the parameter space of the model with spin-dependent chemical potentials. Using the obtained solution, we compute several experimentally observable quantities: charge current, spin current and magnetic properties. Applications to the physically important cases such as the case where the impurity spin is placed in between two ferromagnetically polarized leads are discussed.
description: 13 pages, 2 figures
Supersymmetric Graphene on Squashed Hemisphere
Creators: name: Gupta, Rajesh Kumar
name: Ray, Augniva
name: Sil, Karunava
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the partition function of $\mathcal N=2$ supersymmetric mixed dimensional QED on a squashed hemisphere using localization. Mixed dimensional QED is an abelian gauge theory coupled to charged matter fields at the boundary. The partition function is a function of the complex gauge coupling $τ$, the choice of R-symmetry and the squashing deformation. The superconformal R-symmetry is determined using the 3-dimensional F-maximization. The free energy as a function of squashing deformation allows computing correlation functions that contain the insertion of the energy-momentum tensor. We compute the 2-point correlation function of the boundary energy-momentum tensor by differentiating the free energy with respect to the squashing parameter. We comment on the behaviour of the 2-point function as we change the complex coupling $τ$.
description: 19 pages, 2 figures
title: ΑΝΑΛΥΣΗ ΜΙΚΡΟΜΕΤΑΚΙΝΗΣΕΩΝ ΣΤΗ ΠΕΡΙΟΧΗ ΤΟΥ ΝΟΤΙΟΥ ΑΙΓΑΙΟΥ ΠΕΛΑΓΟΥΣ ΜΕ ΣΥΝΔΥΑΣΜΟ ΙΣΤΟΡΙΚΩΝ ΓΕΩΔΑΙΤΙΚΩΝ, ΓΕΩΦΥΣΙΚΩΝ ΚΑΙ ΣΥΓΧΡΟΝΩΝ ΔΟΡΥΦΟΡΙΚΩΝ ΜΕΤΡΗΣΕΩΝ
titleType: AlternativeTitle
title: ΑΝΑΛΥΣΗ ΜΙΚΡΟΜΕΤΑΚΙΝΗΣΕΩΝ ΣΤΗ ΠΕΡΙΟΧΗ ΤΟΥ ΝΟΤΙΟΥ ΑΙΓΑΙΟΥ ΠΕΛΑΓΟΥΣ ΜΕ ΣΥΝΔΥΑΣΜΟ ΙΣΤΟΡΙΚΩΝ ΓΕΩΔΑΙΤΙΚΩΝ, ΓΕΩΦΥΣΙΚΩΝ ΚΑΙ ΣΥΓΧΡΟΝΩΝ ΔΟΡΥΦΟΡΙΚΩΝ ΜΕΤΡΗΣΕΩΝ
titleType: AlternativeTitle
title: CRUSTAL DEFORMATION ANALYSIS IN THE SOUTH AEGEAN SEA THROUGH THE COMBINATION OF HISTORIC GEODETICAL, GEOPHYSICAL AND MODERN SATELLITE MEASUREMENTS
Creators: name: GKEGKAS, ATHANASIOS NIKOLAOS
Publisher: name: National Technological University of Athens
Year: 2014
Subjects: ΠΑΡΑΜΟΡΦΩΣΗ
ΤΡΙΓΩΝΙΣΜΟΣ
ΝΟΤΙΟ ΑΙΓΑΙΟ
ΤΑΝΥΣΤΗΣ
ΜΙΚΡΟΜΕΤΑΚΙΝΗΣΕΙΣ
DEFORMATION
TRIANGULATION
SOUTH AEGEAN
TENSOR
STRAIN

description: ΣΚΟΠΟΣ ΤΗΣ ΔΙΔΑΚΤΟΡΙΚΗΣ ΔΙΑΤΡΙΒΗΣ ΗΤΑΝ Ο ΠΡΟΣΔΙΟΡΙΣΜΟΣ ΤΩΝ ΜΙΚΡΟΜΕΤΑΚΙΝΗΣΕΩΝ ΣΤΗ ΠΕΡΙΟΧΗ ΤΟΥ ΝΟΤΙΟΥ ΑΙΓΑΙΟΥ ΠΕΛΑΓΟΥΣ ΜΕ ΧΡΗΣΗ ΙΣΤΟΡΙΚΩΝ ΓΕΩΔΑΙΤΙΚΩΝ ΜΕΤΡΗΣΕΩΝ ΚΑΙ Η ΔΙΕΡΕΥΝΥΣΗ ΤΗΣ ΣΥΣΧΕΤΙΣΗΣ ΑΥΤΩΝ ΜΕ ΤΗ ΣΕΙΣΜΟΤΕΚΤΟΝΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΗΣ ΠΕΡΙΟΧΗΣ. Η ΑΝΑΛΥΣΗ ΒΑΣΙΣΤΗΚΕ ΣΤΙΣ ΙΣΤΟΡΙΚΕΣ ΜΕΤΡΗΣΕΙΣ ΤΡΙΓΩΝΙΣΜΟΥ ΤΟΥ ΑΡΧΕΙΟΥ ΤΗΣ ΓΕΩΓΡΑΦΙΚΗΣ ΥΠΗΡΕΣΙΑΣ ΣΤΡΑΤΟΥ ΕΝΩ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΕ Η ΠΡΟΣΕΓΓΙΣΗ ΤΩΝ ΤΑΝΥΣΤΩΝ ΠΑΡΑΜΟΡΦΩΣΗΣ ΚΑΙ ΠΙΟ ΣΥΓΚΕΚΡΙΜΕΝΑ Η ΠΡΟΤΑΘΕΙΣΑ ΑΠΟ ΤΟΝ F.C. FRANK ΜΕΘΟΔΟΣ
description: THE THESIS FOCUSES ON THE DETERMINATION OF THE TEMPORAL CRUSTAL DEFORMATIONS OF THE AREA OF SOUTH-EAST AEGEAN SEA THROUGH HISTORICAL GEODETIC MEASUREMENTS AND THE INVESTIGATION OF THEIR CORRELATION WITH THE SEIMOTECTONIC BEHAVIOR OF THE REGION. THE AVAILABLE HISTORICAL GEODETIC DATA INCLUDES TRIANGULATION MEASUREMENTS FROM THE HMGS ARCHIVE FOR THE TIME PERIOD BETWEEN 1895 AND1982.THE SELECTED DATA WERE PROCESSED WITH THE METHOD PRESENTED BY F. C. FRANK IN 1966.
Analysis of spiral arms using anisotropic wavelets: gas, dust and magnetic fields in M51
Creators: name: Patrikeev, I.
name: Fletcher, A.
name: Stepanov, R.
name: Beck, R.
name: Berkhuijsen, E. M.
name: Frick, P.
name: Horellou, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have developed a technique of isolating elongated structures in galactic images, such as spiral arms, using anisotropic wavelets and apply this to maps of the CO, infrared and radio continuum emission of the grand-design spiral galaxy M51. Systematic shifts between the ridges of CO, infrared and radio continuum emission that are several $\kpc$ long are identified, as well as large variations in pitch angle along spiral arms, of a few tens of degrees. We find two types of arms of polarized radio emission: one has a ridge close to the ridge of CO, with similar pitch angles for the CO and polarization spirals and the regular magnetic field; the other does not always coincide with the CO arm and its pitch angle differs from the orientation of its regular magnetic field. The offsets between ridges of regular magnetic field, dense gas and warm dust are compatible with the sequence expected from spiral density wave triggered star formation, with a delay of a few tens of millions of years between gas entering the shock and the formation of giant molecular clouds and a similar interval between the formation of the clouds and the emergence of young star clusters. At the position of the CO arms the orientation of the regular magnetic field is the same as the pitch angle of the spiral arm, but away from the gaseous arms the orientation of the regular field varies significantly. Spiral shock compression can explain the generation of one type of arm of strong polarized radio emission but a different mechanism is probably responsible for a second type of polarization arm. (Shortened abstract.)
description: 13 pages, 10 figures (2 in colour), accepted for publication in Astronomy and Astrophysics
Host genotype and air mycobiome influence the needle mycobiome of Norway spruce. Sequencing files and tags.
Creators: name: Redondo, Miguel Angel
Publisher: name: figshare
Year: 2021
Subjects: subject: 60202 Community Ecology (excl. Invasive Species Ecology)
subject: FOS: Biological sciences

description: This object contains the fastaq files from the Pacbio sequencing for the needles and spore traps and the tags for the demultiplexing of the reads. There is an excel file with the metadata of each of the samples, including library number and tag number.
Unsupervised Pattern Discovery from Thematic Speech Archives Based on Multilingual Bottleneck Features
Creators: name: Sung, Man-Ling
name: Feng, Siyuan
name: Lee, Tan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Computation and Language (cs.CL)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The present study tackles the problem of automatically discovering spoken keywords from untranscribed audio archives without requiring word-by-word speech transcription by automatic speech recognition (ASR) technology. The problem is of practical significance in many applications of speech analytics, including those concerning low-resource languages, and large amount of multilingual and multi-genre data. We propose a two-stage approach, which comprises unsupervised acoustic modeling and decoding, followed by pattern mining in acoustic unit sequences. The whole process starts by deriving and modeling a set of subword-level speech units with untranscribed data. With the unsupervisedly trained acoustic models, a given audio archive is represented by a pseudo transcription, from which spoken keywords can be discovered by string mining algorithms. For unsupervised acoustic modeling, a deep neural network trained by multilingual speech corpora is used to generate speech segmentation and compute bottleneck features for segment clustering. Experimental results show that the proposed system is able to effectively extract topic-related words and phrases from the lecture recordings on MIT OpenCourseWare.
description: 8 pages, accepted and presented in APSIPA-APC 2018. This work was done when Man-Ling Sung and Siyuan Feng were postgraduate students in the Chinese University of Hong Kong
s-Process Nucleosynthesis in Advanced Burning Phases of Massive Stars
Creators: name: The, Lih-Sin
name: Eid, Mounib F. El
name: Meyer, Bradley S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a detailed study of s-process nucleosynthesis in massive stars of solar-like initial composition and masses 15, 20,25, and 30 Msun. We update our previous results of s-process nucleosynthesis during the core He-burning of these stars and then focus on an analysis of the s-process under the physical conditions encountered during the shell-carbon burning. We show that the recent compilation of the Ne22(alpha,n)Mg25 rate leads to a remarkable reduction of the efficiency of the s-process during core He-burning. In particular, this rate leads to the lowest overproduction factor of Kr80 found to date during core He-burning in massive stars. The s-process yields resulting from shell carbon burning turn out to be very sensitive to the structural evolution of the carbon shell. This structure is influenced by the mass fraction of C12 attained at the end of core helium burning, which in turn is mainly determined by the C12(alpha,gamma)O16 reaction. The still present uncertainty in the rate for this reaction implies that the s-process in massive stars is also subject to this uncertainty. We identify some isotopes like Zn70 and Rb87 as the signatures of the s-process during shell carbon burning in massive stars. In determining the relative contribution of our s-only stellar yields to the solar abundances, we find it is important to take into account the neutron exposure of shell carbon burning. When we analyze our yields with a Salpeter Initial Mass Function, we find that massive stars contribute at least 40% to s-only nuclei with mass A <= 87. For s-only nuclei with mass A >90, massive stars contribute on average ~7%, except for Gd152, Os187, and Hg198 which are ~14%, \~13%, and ~11%, respectively.
description: 52 pages, 16 figures, accepted for publication in ApJ
An apparatus for the measurement of the surface resistance of high temperature superconducting thin films
Creators: name: Knobel, Robert
Publisher: name: University of British Columbia
Year: 2009

description: An apparatus to measure the millimeter-wave surface resistance of thin films of high temperature superconductors has been built. The apparatus consists of a flow cryostat, an open resonator and a swept-frequency millimeter-wave source/detector pair. The flow cryostat is used to cool the experiment to cryogenic temperatures (either 2 K with liquid helium, or 70 K with liquid nitrogen), while keeping a very short distance between the experiment and room temperature. The cryogenic fluid is drawn through the cryostat, and circulates through heat exchangers, absorbing incident heat. The open resonator allows sensitive measurement of the surface resistance of the film at high frequency. The resonator built operates at 117 GHz, and has a Q for copper at 77 K of 39000. The millimeter-wave source and detector are taken from a fixed frequency apparatus, and were modified to provide a frequency sweep capability. The source and detector operate in a band between 116.8 and 117.6 GHz. Measurements were performed on both metallic and superconducting samples. The metallic samples were used as calibration of the geometric factors of the resonator, in order to extract the value of the surface resistance. Four thin films of high temperature superconductors were measured, as a demonstration of the capabilities of the apparatus.