cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Verbindungen, die zählen: Was persönliche Netzwerke sind und wie sie unser Leben beeinflussen
Creators: name: Ell, Theresia
name: Repke, Lydia
Publisher: name: GESIS - Leibniz Institute for the Social Sciences
publisherIdentifier: https://ror.org/018afyw53
publisherIdentifierScheme: ROR
Year: 2025
Subjects: subject: Personal social networks
subject: Social relationships
subject: Social network analysis
subject: LoneCovid

description: GESIS Blog
description: GESIS Blog
description: Everyone is part of a personal social network—often without even realizing it. The relationships within these networks influence how we think, feel, and act. They provide support during tough times, open up new perspectives, and contribute to both our physical and mental well-being. But what exactly do these networks look like, what are they made of, and why do they change over time? This article explores the structure and importance of personal networks—and why they are essential for our resilience and overall quality of life.
description: Jeder Mensch ist Teil eines persönlichen sozialen Netzwerks – oft ohne es bewusst wahrzunehmen. Die darin enthaltenen Beziehungen beeinflussen, wie wir denken, fühlen und handeln. Sie geben Halt in schwierigen Zeiten, eröffnen neue Perspektiven und tragen zu unserer körperlichen und mentalen Gesundheit bei. Doch wie sehen solche Netzwerke aus, woraus bestehen sie und warum verändern sie sich im Laufe des Lebens? In diesem Artikel beleuchten wir die Struktur und Bedeutung persönlicher Netzwerke – und warum sie für unser Wohlbefinden unverzichtbar sind.
description: GESIS Blog
Analyse des difficultés des élèves de deuxième année Baccalauréat marocain en résolution de problèmes de Mécanique
Creators: name: OUASRI, ALI
Publisher: name: Educational Journal of the University of Patras UNESCO Chair
Year: 2017
Subjects: Problem solving, teaching, learning, knowledge, declaratory, procedural

description: This article tries to analyze the difficulties encountered by the pupils (18-19 years) of three classes of second year Moroccan baccalaureat, in activities of problems solving of physics. The analysis of the written productions of the pupils is carried out in terms of the successful, failed and untreated tasks, and then in terms of declaratory or procedural knowledge that the pupils mobilize to carry out or not such task. When it is the tasks whose realization requires the mobilization of procedural knowledge, the number of pupils becomes less important, and few pupils have abilities enabling them to reach the autonomous step in the production process of procedural knowledge.
description: Educational Journal of the University of Patras UNESCO Chair, Vol. 4, N. 2 (2017)
Evaluating the Effect of Local Historic Preservation and Climate Change Action Policy on the Promotion of Operating Energy Efficiency in Historic Buildings
Creators: Boote, Ethan
Publisher: name: Columbia University
Year: 2018
Subjects: Historic preservation
Climatic changes--Government policy
Architecture and energy conservation
Historic buildings--Energy conservation

description: The built environment offers significant potential for achieving climate change mitigation goals. Located within these goals is the strategy to drastically reduce of greenhouse gas emissions through renovating and reusing existing buildings. As a small portion of existing buildings, designated historic buildings play an important role in reducing emissions in urban environments in addition to their role of providing architectural and cultural value. The 2015 Paris Climate Agreement marked an urgent change in urban policy to target greenhouse gas emissions, with fast approaching deadlines. As preservation expands the number of buildings designated on local, state, and federally historic building lists, the number of existing buildings deemed historic will continue to grow, creating the need for historic buildings to contribute meaningfully to energy efficiency improvements and climate change mitigation goals. Operating energy efficiency fits into the larger climate change narrative as an opportunity to reduce long-term building energy consumption and switch to renewable energy sources. Preservationists already use historic building operating energy consumption as an advocacy approach, citing the building’s inherent energy saving features alongside embodied energy saved and sustainable land use opportunities. However, historic buildings consist of a diverse group of buildings that do not necessarily feature inherently sustainable design features. Additionally, current policy frameworks do not back up these claims, often incentivizing historic building reuse projects through ease in energy regulations, specifically energy conservation code exemptions. Conflicts exist among preservationists surrounding historic buildings and energy efficiency due to the potential negative impacts energy retrofits could have on architectural and material character, and the debate has remained remarkably stagnant for the past forty years. Through close evaluation of local regulatory conditions, climate change action initiatives, and project level decision-making, this thesis defines opportunities for changes in the regulatory environment to improve the promotion of operating energy efficiency in historic buildings. By forging the conversation between regulatory officials, historic preservationists, building professionals, and sustainability advocates, this thesis supports further exploration of how historic preservation can serve the present-day need of climate change mitigation.
Exploring Fault-Tolerant Erasure Codes for Scalable All-Flash Array Clusters
Creators: name: Koh, Sungjoon
name: Zhang, Jie
name: Kwon, Miryeong
name: Yoon, Jungyeon
name: Donofrio, David
name: Kim, Nam Sung
name: Jung, Myoungsoo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Large-scale systems with all-flash arrays have become increasingly common in many computing segments. To make such systems resilient, we can adopt erasure coding such as Reed-Solomon (RS) code as an alternative to replication because erasure coding incurs a significantly lower storage overhead than replication. To understand the impact of using erasure coding on the system performance and other system aspects such as CPU utilization and network traffic, we build a storage cluster that consists of approximately 100 processor cores with more than 50 high-performance solid-state drives (SSDs), and evaluate the cluster with a popular open-source distributed parallel file system, called Ceph. Specifically, we analyze the behaviors of a system adopting erasure coding from the following five viewpoints, and compare with those of another system using replication: (1) storage system I/O performance; (2) computing and software overheads; (3) I/O amplification; (4) network traffic among storage nodes, and (5) impact of physical data layout on performance of RS-coded SSD arrays. For all these analyses, we examine two representative RS configurations, used by Google file systems, and compare them with triple replication employed by a typical parallel file system as a default fault tolerance mechanism. Lastly, we collect 96 block-level traces from the cluster and release them to the public domain for the use of other researchers.
description: 19 pages, 46 figures. arXiv admin note: substantial text overlap with arXiv:1709.05365
Sonoluminescing air bubbles rectify argon
Creators: name: Lohse, Detlef
name: Brenner, Michael P.
name: Dupont, Todd F.
name: Hilgenfeldt, Sascha
name: Johnston, Blaine
Publisher: name: arXiv
Year: 1996
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The dynamics of single bubble sonoluminescence (SBSL) strongly depends on the percentage of inert gas within the bubble. We propose a theory for this dependence, based on a combination of principles from sonochemistry and hydrodynamic stability. The nitrogen and oxygen dissociation and subsequent reaction to water soluble gases implies that strongly forced air bubbles eventually consist of pure argon. Thus it is the partial argon (or any other inert gas) pressure which is relevant for stability. The theory provides quantitative explanations for many aspects of SBSL.
description: 4 pages
title: Rosa rubiginosa
title: Wein-Rose (Rosa rubiginosa)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 4 Bilder der Wein-Rose.
PISA in the Greek daily Press: the social significations and the relationship between the Greek society and the global education policy field
Creators: name: TSAKIRIS, DESPINA
name: NIKITA, DIMITRA PAVLINA
Publisher: name: Educational Journal of the University of Patras UNESCO Chair
Year: 2017
Subjects: PISA, press, globalisation, education policy, social imaginary

description: Literature has been discussing the influence of International Organisations (IOs) on education policies ever since globalisation became the regime of our times. In this regard, a global education policy field has emerged where IOs meet with nations on different levels. This project focuses on PISA, the OECD’s programme of student assessment, and aims to explore the emergence and expression of the social imaginary significations that arise in the Greek daily Press regarding PISA. By looking at PISA-related press publications, this paper addresses the unequivocal power of Press and seeks to understand how Greek society positions itself within the global education policy field i.
description: Educational Journal of the University of Patras UNESCO Chair, Vol. 4, N. 2 (2017)
SL(2,C) Gauge Theory of Gravitation and the Quantization of the Gravitational Field
Creators: name: Carmeli, Moshe
name: Malin, Shimon
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A new approach to quantize the gravitational field is presented. It is based on the observation that the quantum character of matter becomes more significant as one gets closer to the big bang. As the metric loses its meaning, it makes sense to consider Schrodinger's three generic types of manifolds - unconnected differentiable, affinely connected, and metrically connected - as a temporal sequence following the big bang. Hence one should quantize the gravitational field on general differentiable manifolds or on affinely connected manifolds. The SL(2,C) gauge theory of gravitation is employed to explore this possibility. Within this framework, the quantization itself may well be canonical.
description: 6 pages, published in Intern. j. Theor. Phys. Vol. 37, No. 10, pp.2615-2620 (1998)
title: Rosa rugosa
title: Kartoffel-Rose (Rosa rugosa)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 5 Bilder der Kartoffel-Rose.
Additional file 3: of Postoperative elective pelvic nodal irradiation compared to prostate bed irradiation in locally advanced prostate cancer â a retrospective analysis of dose-escalated patients
Creators: name: Link, Carola
name: Honeck, Patrick
name: Makabe, Akiko
name: Giordano, Frank
name: Bolenz, Christian
name: Joerg Schaefer
name: Bohrer, Markus
name: Lohr, Frank
name: Wenz, Frederik
name: Buergy, Daniel
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: Figure S3. (a-b) Univariate survival analyses of patients treated with or without concurrent ADT. (DOCX 178 kb)
Elementary dynamics in Algerian secondary school: difficulties of assimilation and contribution of modeling activities in the construction of the notion of force
Creators: name: SERHANE, AHCENE
name: ZEGHDAOUI, ABDELHAMID
name: DEBIACH, MEHDI
Publisher: name: Educational Journal of the University of Patras UNESCO Chair
Year: 2017
Subjects: Force, difficulties, assimilation modeling activities, conceptions

description: This work attempts to analyze the conceptual difficulties encountered by Algerian secondary school pupils aged (14-17) when studying mechanical school situations that can be modeled in terms of force. Based essentially on a qualitative method, and more specifically on the analysis of data collected after the completion of a questionnaire and in individual interviews, this study has, on the one hand, highlighted Difficulties related to modeling activities, on the other hand elucidated their causes.
description: Educational Journal of the University of Patras UNESCO Chair, Vol. 4, N. 2 (2017)
Stellar wind impact on early atmospheres around unmagnetized Earth-like planets
Creators: name: Canet, Ada
name: Varela, Jacobo
name: De Castro, Ana I. Gómez
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Stellar rotation at early ages plays a crucial role in the survival of primordial atmospheres around Earth-mass exoplanets. Earth-like planets orbiting fast-rotating stars may undergo complete photoevaporation within the first few hundred Myr driven by the enhanced stellar XUV radiation, while planets orbiting slow-rotating stars are expected to experience difficulty to lose their primordial envelopes. Besides the action of stellar radiation, stellar winds induce additional erosion on these primordial atmospheres, altering their morphology, extent, and causing supplementary atmospheric losses. In this paper, we study the impact of activity-dependent stellar winds on primordial atmospheres to evaluate the extent at which the action of these winds can be significant in the whole planetary evolution at early evolutionary stages. We performed 3D magnetohydrodynamical (MHD) simulations of the interaction of photoevaporating atmospheres around unmagnetized Earth-mass planets in the time-span between 50 and 500 Myr, analyzing the joint evolution of stellar winds and atmospheres for both fast- and slow-rotating stars. Our results reveal substantial changes in the evolution of primordial atmospheres when influenced by fast-rotating stars, with a significant reduction in extent at early ages. In contrast, atmospheres embedded in the stellar winds from slow-rotating stars remain largely unaltered. The interaction of the magnetized stellar winds with the ionized upper atmospheres of these planets allows to evaluate the formation and evolution of different MHD structures, such as double-bow shocks and induced magnetospheres. This work will shed light to the first evolutionary stages of Earth-like exoplanets, that are of crucial relevance in terms of planet habitability.
PISA & Greek Curriculum of science for last two classes of primary school: comparative analysis and assessment
Creators: name: PRAMAS, CHRISTOS
name: KOUMARAS, PANAGIOTIS
Publisher: name: Educational Journal of the University of Patras UNESCO Chair
Year: 2017
Subjects: Literacy in Science, knowledge-based approach, abilities, daily life

description: The analysis of PISA, in the context of the analysis implement we used, seems to designate important suggestions for writing science curriculum in compulsory education. These proposals aim at the obtainment of basic knowledge and at the culture of abilities (abilities-keywords) for everyday life: communication, collection and processing of information (data), cooperation and collectivity, problem solving, critical thinking and reflection, creativity and culture of citizenship. In the same context the analysis of (a) general part of Greek Curriculum, (b) the Greek Curriculum of Science for all levels of compulsory education, and (c) the Curriculum “Explore the natural world” for the two last classes of primary school are attempted, which apply today in the obligatory education of our country. The results showed that the general part of the Greek Curriculum and the Greek Curriculum of science for compulsory education, theoretically talking, coincide with the PISA proposals. However, it seems that the curriculum “Explore the natural world” of the two last classes of primary school deviates from the philosophy and the suggestions of PISA, having characteristics of traditional knowledge-based curricula.
description: Educational Journal of the University of Patras UNESCO Chair, Vol. 4, N. 2 (2017)
An Amended Formula for the Decay of Radioactive Material for Cosmic Times
Creators: name: Carmeli, Moshe
name: Malin, Shimon
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: An amended formula for the decay of radioactive material is presented. It is a modification of the standard exponential formula. The new formula applies for long cosmic times that are comparable to the Hubble time. It reduces to the standard formula for short times. It is shown that the material decays faster than expected. The application of the new formula to direct measurements of the age of the Universe and its implications is briefly discussed.
description: 8 pages, 1 figure
(????, ????, ????, ????)-Center Problem
Creators: name: Kavand, P.
name: Mohades, Ali
name: Eskandari, Marzieh
Publisher: name: figshare
Year: 2021
Subjects: Applied Computer Science
Theoretical Computer Science

description: Given a set 𝑆 of 𝑛 points in the plane and a constant 𝛼,(𝑛, 1, 1, 𝛼)-center problem is to find two closed disks which each covers the whole 𝑆, the diameter of the bigger one is minimized, and the distance of the two centers is at least 𝛼. Constrained (𝑛, 1, 1, 𝛼)-center problem is the (𝑛, 1, 1, 𝛼)-center problem in which the centers are forced to lie on a given line 𝐿. In this paper, we first introduce (𝑛, 1, 1, 𝛼)-center problem and its constrained version. Then, we present an 𝑂(𝑛 log 𝑛) algorithm for solving the (𝑛, 1, 1, 𝛼)-center problem.Finally, we propose a linear time algorithm for its constrained version.
Evaluating the Effect of New-teacher Induction Programs on Teacher Turnover
Creators: You, You
Publisher: name: Columbia University
Year: 2012
Subjects: Education and state
School management and organization
Labor economics

description: New-teacher induction programs are widely used as non-monetary interventions, with the reduction of teacher turnover being one of their purposes. During the last three decades, states have been active in legislation to mandate induction programs for new teachers in public schools. Motivated by the discrepancy of the estimated program effects on teacher turnover in the existing literature, this study attempts to examine whether analytical methods used to address the endogeneity of induction-program participation matter in explaining this inconsistency in the estimation of the effect of new-teacher induction programs and how mandatory induction legislation and/or policy are linked with new-teacher induction programs and teacher turnover. Specifically, three key research questions are examined, including what are the determinants of new teachers' turnover, whether new-teacher induction programs have effects on teacher turnover, and whether state induction legislation and/or local mentoring policy have effects on teacher turnover. Two main sources of data are employed, including multiple cycles of Schools and Staffing Survey and Teacher Follow-up Survey, the largest nationally representative sample surveys on teachers and their schools in the United States, as well as New York City Department of Education administrative data, the longitudinal data concerning public school new teachers and their job status in the largest public education system in the United States. In order to address the potential endogeneity problem that may be associated with the induction program participation, this study employs identification strategies such as propensity-score matching, instrumental variable, and difference-in-difference methods. Particularly, in estimation, the difference-in-differences strategy is incorporated with the instrumental variable method as well as nonlinear models. The current study finds that, after addressing the endogeneity problem, new-teacher induction programs hardly have any effects on reducing teacher turnover, which is different from what most previous studies have found. It is also implied that if a mandatory induction/mentoring law/policy does not encourage new teachers' participation in a comprehensive induction/mentoring program, it may not work in terms of reducing teachers' exit turnover at best. This study contributes in literature on new-teacher induction programs and teacher turnover in terms of analytical methods, generalizability of findings, understanding of induction legislation and policy, and proper research design considerations for future studies.
Evaluating the Effect Urban Rail Expansion on Regional Density Distribution in Portland, OR
Creators: Heard, Emily
Publisher: name: Columbia University
Year: 2014
Subjects: subject: City planning
subject: Demography
subject: FOS: Sociology
subject: Social structure

description: Over time, American cities have significantly decentralized and this development pattern, dubbed ‘sprawl’, has come to be seen as a costly and inefficient development pattern that should be limited. In urban planning literature, sprawl is seen as inherently connected to a car centric physical environment. This puts improving accessibility via alternative transportation modes at the forefront of many solutions to sprawl. Transit availability and likewise transit success is seen as inherently connected to sufficient urban density. Sprawl is a regional problem because spatial dispersion goes beyond the current limits of jurisdictional regulations. As regions attempt to design effective strategies to navigate the problems created by urban sprawl, they frequently consider expanding their transit systems as an incentive for more concentrated development. This thesis examines the effectiveness of investing in new transit infrastructure, particularly fixed rail transit such as light rail and commuter rail, as a regional strategy to increase urban density by exploring the changes that have occurred in Portland, OR over the course of 20 years as they have rapidly expanded their transit system.

There are three stages of analysis. First, descriptive statistics provide an overview of trends in metropolitan wide density versus the transit shed, defined as within 2 miles of any current light or commuter rail station. Secondly, the analysis uses hot spot analysis to examine whether Portland’s population, employment, and labor density are clustered and where relatively high density clusters changed between 1990, 2000, and 2010. Finally, bivariate and multivariate regression models were built to measure whether there was a statistical association between density and fixed rail expansion by looking at how density relates to proximity to downtown, light rail stations, and transfer points. If transit expansion causes regional density concentrations to adjust towards transit, then the regression should show an increasingly positive relationship as the transit system was expanded.

The research hypothesis was that areas around rail transit stations will show an increasingly positive association over the study period. Additionally, that transfer stations where more than one line connect should show greater explanatory power and a stronger positive relationship.
Additional file 2: of A chloroplast-targeted pentatricopeptide repeat protein PPR287 is crucial for chloroplast function and Arabidopsis development
Creators: name: Kwanuk Lee
name: Park, Su
name: Han, Ji
name: Jeon, Young
name: Pai, Hyun-Sook
name: Hunseung Kang
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: 60506 Virology
subject: Computational Biology

description: Tissue-specific expression patterns of PPR287. GUS activity in (a) 5-day-old seedling, (b) 14-day-old seedling, (c) 30-day-old leaf, (d) 40-day-old stem, (e) and (f) flowers, (g) stigma, and (h) siliques. Barâ =â 1â cm. (PDF 49 kb)
title: Low resource NLP for polysynthetic languages : morphological segmentation and machine translation
Creators: name: Mager Hois, Jesus Manuel
Publisher: name: Universität Stuttgart
Year: 2024
Subjects: subject: 004

description: This thesis explores the application of Natural Language Processing (NLP) techniques to morphologically rich indigenous languages of the Americas, focusing on low-resource scenarios. The work addresses the challenges of modeling morphological segmentation and machine translation for these languages, often lacking large annotated datasets and facing issues like code-switching and orthographic normalization. Contributions include the development of new datasets, the adaptation of neural network models for specific tasks, and the investigation of the impact of morphological segmentation on machine translation performance. Additionally, the thesis delves into the ethical implications of applying NLP technologies to these languages, considering the perspectives of native speakers and community leaders.
description: Diese Dissertation untersucht die Anwendung von Techniken der Verarbeitung natürlicher Sprache (NLP) auf morphologisch reiche indigene Sprachen Amerikas, mit Fokus auf Szenarien mit begrenzten Ressourcen. Die Arbeit befasst sich mit den Herausforderungen der Modellierung morphologischer Segmentierung und maschineller Übersetzung für diese Sprachen, denen oft umfangreiche annotierte Datensätze fehlen und die mit Problemen wie Code-Switching und orthografischer Normalisierung konfrontiert sind. Zu den Beiträgen gehören die Entwicklung neuer Datensätze, die Anpassung neuronaler Netzwerkmodelle für spezifische Aufgaben und die Untersuchung der Auswirkungen morphologischer Segmentierung auf die Leistung maschineller Übersetzung. Darüber hinaus geht die Dissertation auf die ethischen Implikationen der Anwendung von NLP-Technologien auf diese Sprachen ein und berücksichtigt dabei die Perspektiven von Muttersprachlern und Gemeindeführern.
On the determination of accelerometer positions within host devices
Creators: name: Larnder, C. I.
name: Larade, B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A review of recent accelerometry experiments points to the need for a careful consideration of the question of where, exactly, the accelerometer sensor itself is located within the device that hosts the services required for its operation. We propose a simple measure for characterising the regime of experimental conditions under which these implied positional errors become significant. We then present a method for reliably determining the accelerometer position and apply it to a wide variety of host devices ranging from data loggers to smartphones and tablets. Although the obvious value of the method lies in the improved accuracy of the ensuing accelerometry, the preliminary process of discovering the accelerometer position becomes a valuable and complete pedagogical experience in itself, providing insight into both the principles of radial acceleration and the internal structure of current-generation digital devices.
A metaplectic perspective of uncertainty principles in the Linear Canonical Transform domain
Creators: name: Dias, Nuno Costa
name: de Gosson, Maurice
name: Prata, João Nuno
Publisher: name: arXiv
Year: 2024
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We derive Heisenberg uncertainty principles for pairs of Linear Canonical Transforms of a given function, by resorting to the fact that these transforms are just metaplectic operators associated with free symplectic matrices. The results obtained synthesize and generalize previous results found in the literature, because they apply to all signals, in arbitrary dimension and any metaplectic operator (which includes Linear Canonical Transforms as particular cases). Moreover, we also obtain a generalization of the Robertson-Schrödinger uncertainty principle for Linear Canonical Transforms. We also propose a new quadratic phase-space distribution, which represents a signal along two intermediate directions in the time-frequency plane. The marginal distributions are always non-negative and permit a simple interpretation in terms of the Radon transform. We also give a geometric interpretation of this quadratic phase-space representation as a Wigner distribution obtained upon Weyl quantization on a non-standard symplectic vector space. Finally, we derive the multidimensional version of the Hardy uncertainty principle for metaplectic operators and the Paley-Wiener theorem for Linear Canonical Transforms.
description: 55 pages, to appear in J. Funct. Anal
Studies of chaotic Dynamics in a Three-Dimensional Superconducting Microwave Billiard
Creators: name: Alt, H.
name: Graef, H. -D.
name: Hofferbert, R.
name: Rehfeld, H.
name: Richter, A.
name: Schardt, P.
name: Wirzba, A.
name: Rangacharyulu, C.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present first measurements on a superconducting three-dimensional, partly chaotic microwave billiard shaped like a small deformed cup. We analyze the statistical properties of the measured spectrum in terms of several methods originally derived for quantum systems like eigenvalue statistics and periodic orbits and obtain according to a model of Berry and Robnik a mixing parameter of about 25%. In numerical simulations of the classical motion in the cup the degree of chaoticity has been estimated. This leads to an invariant chaotic Liouville measure of about 45%. The difference between this figure and the mixing parameter is due to the limited accuracy of the statistical analysis, caused by both, the fairly small number of 286 resonances and the rather poor desymmetrization of the microwave cavity. Concerning the periodic orbits of the classical system we present a comparison with the length spectrum of the resonator and introduce a new bouncing ball formula for electromagnetic billiards.
description: 9 pages (RevTex) , 10 figures included, full resolution figures are available upon request from hofferbert@linac.ikp.physik.th-darmstadt.de, to be published in Phys. Rev. E
Parallel three-dimensional simulations of quasi-static elastoplastic solids
Creators: name: Boffi, Nicholas M.
name: Rycroft, Chris H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Hypo-elastoplasticity is a flexible framework for modeling the mechanics of many hard materials under small elastic deformation and large plastic deformation. Under typical loading rates, most laboratory tests of these materials happen in the quasi-static limit, but there are few existing numerical methods tailor-made for this physical regime. In this work, we extend to three dimensions a recent projection method for simulating quasi-static hypo-elastoplastic materials. The method is based on a mathematical correspondence to the incompressible Navier-Stokes equations, where the projection method of Chorin (1968) is an established numerical technique. We develop and utilize a three-dimensional parallel geometric multigrid solver employed to solve a linear system for the quasi-static projection. Our method is tested through simulation of three-dimensional shear band nucleation and growth, a precursor to failure in many materials. As an example system, we employ a physical model of a bulk metallic glass based on the shear transformation zone theory, but the method can be applied to any elastoplasticity model. We consider several examples of three-dimensional shear banding, and examine shear band formation in physically realistic materials with heterogeneous initial conditions under both simple shear deformation and boundary conditions inspired by friction welding.
description: Final version. Accepted for publication in Computer Physics Communications
Enriched set-valued P-partitions and shifted stable Grothendieck polynomials
Creators: name: Lewis, Joel Brewster
name: Marberg, Eric
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: K-Theory and Homology (math.KT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We introduce an enriched analogue of Lam and Pylyavskyy's theory of set-valued $P$-partitions. An an application, we construct a $K$-theoretic version of Stembridge's Hopf algebra of peak quasisymmetric functions. We show that the symmetric part of this algebra is generated by Ikeda and Naruse's shifted stable Grothendieck polynomials. We give the first proof that the natural skew analogues of these power series are also symmetric. A central tool in our constructions is a "$K$-theoretic" Hopf algebra of labeled posets, which may be of independent interest. Our results also lead to some new explicit formulas for the involution $ω$ on the ring of symmetric functions.
description: 51 pages; v2: one conjecture upgraded to a theorem, another new conjecture added, some minor edits; v3: minor edits, fixed typos, added references
title: Rosa agrestis
title: Feld-Rose (Rosa agrestis)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Rosa arvensis
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 2 Bilder der Feld-Rose.
FLUID FLOW THROUGH HETEROGENEOUS METHANE HYDRATE-BEARING SAND: OBSERVATIONS USING X-RAY CT SCANNING
Creators: name: Seol, Yongkoo
name: Kneafsey, Timothy J.
Publisher: name: The University of British Columbia
Year: 2008

description: The effects of porous medium heterogeneity on methane hydrate formation, water flow through the heterogeneous hydrate-bearing sand, and hydrate dissociation were observed in an experiment using a heterogeneous sand column with prescribed heterogeneities. X-ray computed tomography (CT) was used to monitor saturation changes in water, gas, and hydrate during hydrate formation, water flow, and hydrate dissociation. The sand column was packed in several segments having vertical and horizontal layers with two distinct grain-size sands. The CT images showed that as hydrate formed, the water and hydrate saturations were dynamically redistributed by variations in capillary strength of the medium (the tendency for a material to imbibe water), which changed with the presence and saturation of hydrate. Water preferentially flowed through fine sand near higher hydrate-saturation regions where the capillary strength was elevated relative to the lower hydrate saturation regions. Hydrate dissociation initiated by depressurization varied with different grain sizes and hydrate saturations.
title: Gymnadenia odoratissima
title: Wohlriechende Händelwurz (Gymnadenia odoratissima)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 16 Bilder des Wohlriechenden Händelwurzes.
Ergodic Properties of the Quantum Ideal Gas in the Maxwell-Boltzmann Statistics
Creators: name: Lenci, Marco
Publisher: name: arXiv
Year: 1996
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is proved that the quantization of the Volkovyski-Sinai model of ideal gas (in the Maxwell-Boltzmann statistics) enjoys at the thermodynamical limit the properties of mixing and ergodicity with respect to the quantum canonical Gibbs state. Plus, the average over the quantum state of a pseudo-differential operator is exactly the average over the classical canonical measure of its Weyl symbol.
description: 35 pages, LaTeX
Additional file 1 of Heat shock drives genomic instability and phenotypic variations in yeast
Creators: name: Shen, Li
name: Wang, Yu-Ting
name: Tang, Xing-Xing
name: Zhang, Ke
name: Wang, Pin-Mei
name: Sui, Yang
name: Zheng, Dao-Qiong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Additional figures and tables.
Coordinate transformation methodology for simulating quasi-static elastoplastic solids
Creators: name: Boffi, Nicholas M.
name: Rycroft, Chris H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Molecular dynamics simulations frequently employ periodic boundary conditions where the positions of the periodic images are manipulated in order to apply deformation to the material sample. For example, Lees-Edwards conditions use moving periodic images to apply simple shear. Here, we examine the problem of precisely comparing this type of simulation to continuum solid mechanics. We employ a hypoelastoplastic mechanical model, and develop a projection method to enforce quasistatic equilibrium. We introduce a simulation framework that uses a fixed Cartesian computational grid on a reference domain, and which imposes deformation via a time-dependent coordinate transformation to the physical domain. As a test case for our method, we consider the evolution of shear bands in a bulk metallic glass using the shear transformation zone theory of amorphous plasticity. We examine the growth of shear bands in simple shear and pure shear conditions as a function of the initial preparation of the bulk metallic glass.
title: Anacamptis pyramidalis
title: Hundswurz (Anacamptis pyramidalis)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 13 Bilder des Hundswurzes.
title: Herminium monorchis
title: Einknolle (Herminium monorchis)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 9 Bilder der Einknolle.
Additional file 2: of Postoperative elective pelvic nodal irradiation compared to prostate bed irradiation in locally advanced prostate cancer â a retrospective analysis of dose-escalated patients
Creators: name: Link, Carola
name: Honeck, Patrick
name: Makabe, Akiko
name: Giordano, Frank
name: Bolenz, Christian
name: Joerg Schaefer
name: Bohrer, Markus
name: Lohr, Frank
name: Wenz, Frederik
name: Buergy, Daniel
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Cancer

description: Figure S2. (a-b) Univariate survival analyses showing postoperatively treated patients compared to patients with rising PSA values (salvage treatment). (DOCX 181 kb)
Evaluating the Effects of Mindfulness Practices in Young Children Using Electrophysiological Measures of Attention and Salivary Measures of Stress
Creators: Avery, Trey
Publisher: name: Columbia University
Year: 2016
Subjects: subject: Mindfulness (Psychology)
subject: Children
subject: Neurosciences
subject: FOS: Clinical medicine
subject: Education
subject: Cognitive psychology

description: Research from multiple fields and methodologies has aligned in recent years to support the development of biological models of mechanisms underlying effects of mindfulness practices in adults. Mindfulness-based programs for young children have proliferated in recent years but research examining the effects of these programs and practices is less conclusive, generally showing small mixed effects. Questions about age of initiation and the format, dosage and emphasis of programs represent a significant challenge that will require integrated multidisciplinary collaboration. The current study demonstrates the feasibility, sensitivity and reliability of electroencephalographic (EEG) measures of attention, and salivary measures of stress, in measuring biological changes associated with mindfulness practices in children aged five to seven years. Widely used and reliable behavioral measures showed no significant differences between groups whereas EEG measures showed significant group differences in event-related potentials associated with different attention networks elicited by the Attention Network Task for Children (ANT-C). The multiple salivary measures of stress showed mixed differences in slope by measure and group, some of which were predicted and align with previous literature, albeit not reaching statistical significance. Together, results demonstrate the value of utilizing multiple biological measures, particularly functional brain imaging, as a means to gain insights into the effects of mindfulness-based practices in young children. Additional data and more rigorous study designs are needed to directly associate observed differences with specific mindfulness programs and practices, but data suggest mindfulness practices enhance attentional and executive control which in turn could support enhanced regulation of the stress response system. Mindfulness based interventions and programs in early development have the potential to protect and enhance the development of critical biological systems that support academic achievement, health and wellbeing.
Aspects of Cosmological Relativity
Creators: name: Carmeli, Moshe
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We review cosmological relativity, a new special theory of relativity that was recently developed for cosmology, and discuss in detail some of its aspects.
description: 15 pages; invited talk at the Fourth Alexander Friedmann Seminar on Gravitation and Cosmology; accepted for publication in Intern. J. Theor. Phys., to appear July 1999
title: Programming shape-change : integrative computational design of materials, mesostructures, and motion mechanisms for 4D-printing
title: Programmierung der Formveränderung : integratives Entwerfen und Berechnen von Materialien, Mesostrukturen und Bewegungsmechanismen für den 4D-Druck
titleType: AlternativeTitle
Creators: name: Tahouni, Yasaman
Publisher: name: Stuttgart : Institute for Computational Design and Construction, University of Stuttgart
Year: 2024
Subjects: subject: 720

description: Shape-changing material systems are advantageous as passively actuated mechanisms for generating movement, with architectural applications ranging from adaptive building skins to the self-shaping manufacturing of building components. 4D printing, a technique that combines stimuli-responsive materials with additive manufacturing, is a promising method for the fabrication and programming of shape-changing structures. However, limitations in material responsiveness, programmability of shape-change, and the robustness of structures have constrained their functionality and real-world applicability. This dissertation introduces an integrative computational fabrication approach for the development of 4D printed hygroscopic material systems based on co-designing materials, mesostructures, and motion mechanisms. By tuning the material properties and structuring at hierarchical length scales, highly functional and precisely programmable 4D printed material systems have been developed. This material programming approach has been demonstrated through three studies, each focusing on one of the aforementioned aspects: by co-designing biobased cellulose-filled materials for 4D printing, the responsiveness of structures to target ranges of ambient relative humidity levels has been tuned; by precisely designing the mesoscale material structuring inside the 4D printed elements, their spatial and temporal shape change has been programmed; and through the development and utilization of computational fabrication workflows for 4D printing, novel motion mechanisms with enhanced functionality, such as motion amplification, have been created. The proposed material programming methodology and the developed material system have been implemented in the design and fabrication of SolarGate, a 4D printed, weather-responsive façade system installed on the LivMatS Biomimetic Shell. Consisting of 424 4D printed shading elements, the SolarGate regulates the solar heat gain of the building by providing adaptive shading in response to daily and seasonal weather cycles without consuming any operational energy. These results showcase the potential for creating an architecture that is highly functional, ecological, and in tune with the environment, being powered by and at the same time empowering the earth.