cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Feedback Loops of the Mammalian Circadian Clock Constitute Repressilator
Creators: name: Pett, Jan Patrick
name: Korenčič, Anja
name: Wesener, Felix
name: Kramer, Achim
name: Herzel, Hanspeter
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: 610 Medizin und Gesundheit

description: Mammals evolved an endogenous timing system to coordinate their physiology and behaviour to the 24h period of the solar day. While it is well accepted that circadian rhythms are generated by intracellular transcriptional feedback loops, it is still debated which network motifs are necessary and sufficient for generating self-sustained oscillations. Here, we systematically explore a data-based circadian oscillator model with multiple negative and positive feedback loops and identify a series of three subsequent inhibitions known as “repressilator” as a core element of the mammalian circadian oscillator. The central role of the repressilator motif is consistent with time-resolved ChIP-seq experiments of circadian clock transcription factors and loss of rhythmicity in core clock gene knockouts.
title: Ультразвуковая анатомия тазового дна у рожавших и нерожавших женщин
title: Ultrasonic Anatomy of the Pelvic Floor in Parous and Nulliparous Women
Creators: name: Коваль, Марина Владимировна
name: Бодунова, Людмила Александровна
name: Митягина, Яна Ришатовна
name: Росюк, Елена Александровна
Publisher: name: Издательский центр СурГУ
Year: 2023

description: Цель – оценка возможностей ультразвуковой диагностики анатомических структур тазового
дна рожавших и нерожавших женщин как одного из методов оценки функционального состояния мышц таза.
Проанализированы сведения из зарубежных и отечественных статей в базах данных PubMed, eLIBRARY за период с 2012 по 2022 гг. Ультразвуковая диагностика с применением нагрузочных проб, являясь доступным, повсеместным и незатратным методом с четкими общепринятыми критериями, позволяет точно ставить диагноз и начинать раннюю реабилитацию даже при отсутствии выраженной клинической картины недостаточности мышц
тазового дна. Выявлена значительная корреляция возникновения данной патологии с естественным родоразрешением, в особенности в ситуациях инструментального родоразрешения щипцами, значительной окружности головы новорожденного и сопутствующих разрывах и травмах.
description: The study aims to assess the possibilities of pelvic floor anatomy ultrasound diagnosis in parous and
nulliparous women as one of the methods for determining the functional state of the pelvic muscles. Foreign and
domestic articles on the issue, published in PubMed and eLIBRARY databases in 2012–2022, were analyzed. Being
an accessible, common, and inexpensive method with clear generally accepted criteria, ultrasound diagnosis with
loading tests allows for accurate diagnosis and early rehabilitation, despite the absence of a detailed clinical picture
of pelvic floor muscle insufficiency. There was a significant correlation between the occurrence of this pathology
and natural delivery, particularly in cases with artificial delivery with forceps, a significant newborn’s head circumference, and concomitant ruptures and injuries.
Saxifraga moschata
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: S. moschata X muscoides Cat. 159. Zu streichen.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Prevalence and correlates of truancy among adolescents in Swaziland: findings from the Global School-Based Health Survey
Creators: name: Rudatsikira, Emmanuel
name: Muula, Adamson S
name: Siziya, Seter
Publisher: name: BioMed Central Ltd
Year: 2007

description: Abstract Background Educational attainment is an important determinant of diverse health outcomes. Truancy among adolescents jeopardizes chances of achieving their educational goals. Truant behaviors are also associated with various psychosocial problems. There is however limited data on the prevalence and factors associated with truancy among adolescents in Africa. Methods We used data from the Swaziland Global School-Based Health Survey (GSHS) conducted in 2003 to estimate the prevalence of self-reported truancy within the last 30 days among adolescents. We also assessed the association between self-reported truancy and a selected list of independent variables using logistic regression analysis. Results A total of 7341 students participated in the study. In analysis of available data, 2526 (36.2%) and 4470 (63.8%) were males and females respectively. The overall prevalence of truancy within the last 30 days preceding the study was 21.6%. Prevalence of truancy was 27.4% (605) and 17.9% (723) in males and females respectively. In multivariate logistic regression analysis, being a male, having been bullied, lower school grades, and alcohol use were positively associated with truancy. Adolescents who perceived themselves as having parental support were less likely to have reported being truant. Conclusion Truancy among adolescents in Swaziland should be regarded as an important social problem as it is relatively prevalent. The design and implementation of intervention programs aimed to reduce truant behaviours should incorporate our knowledge of the factors identified as associated with bullying.
Introducing a novel model for simulating large loop excision of the transformation zone (LLETZ) using 3D printing technique
Creators: name: Kiesel, Matthias
name: Beyers, Inga
name: Kalisz, Adam
name: Wöckel, Achim
name: Herbert, Saskia-Laureen
name: Curtaz, Carolin
name: Diessner, Joachim
name: Joukhadar, Ralf
name: Wulff, Christine
Publisher: name: Berlin ; Heidelberg : Springer
Year: 2021
Subjects: subject: 3D printing
subject: Dysplasia
subject: Fused deposition modeling (FDM)
subject: Gynecology
subject: Large loop excision of the transformation zone (LLETZ)
subject: Virtual
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: Purpose: Electrosurgery is the gold-standard procedure for the treatment of cervical dysplasia. The quality of the outcome depends on the accuracy of performance, which underlines the role of adequate training of surgeons, especially, as this procedure is often performed by novice surgeons. According to our knowledge, medical simulation has up until now lacked a model, which focuses on realistically simulating the treatment of cervical dysplasia with the concerning anatomy. Methods and result: In our work, we present a model created using 3D printing for holistically simulating diagnostic, as well as surgical interventions of the cervix, as realistically as possible. Conclusion: This novel simulator is compared to an existing model and both are evaluated. By doing so, we aim to provide novice gynecologists with standardized and high-quality simulation models for practicing to improve their proficiency. © 2021, The Author(s).
An Energy-Aware Protocol for Self-Organizing Heterogeneous LTE Systems
Creators: name: Hou, I-Hong
name: Chen, Chung Shue
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper studies the problem of self-organizing heterogeneous LTE systems. We propose a model that jointly considers several important characteristics of heterogeneous LTE system, including the usage of orthogonal frequency division multiple access (OFDMA), the frequency-selective fading for each link, the interference among different links, and the different transmission capabilities of different types of base stations. We also consider the cost of energy by taking into account the power consumption, including that for wireless transmission and that for operation, of base stations and the price of energy. Based on this model, we aim to propose a distributed protocol that improves the spectrum efficiency of the system, which is measured in terms of the weighted proportional fairness among the throughputs of clients, and reduces the cost of energy. We identify that there are several important components involved in this problem. We propose distributed strategies for each of these components. Each of the proposed strategies requires small computational and communicational overheads. Moreover, the interactions between components are also considered in the proposed strategies. Hence, these strategies result in a solution that jointly considers all factors of heterogeneous LTE systems. Simulation results also show that our proposed strategies achieve much better performance than existing ones.
Planning for Arts and Innovation in Wilson, NC
Creators: name: Lentz, Rodger
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: The City of Wilson got its start as a transportation center with a rail depot. Wilson’s economy began to thrive when agriculture in the surrounding area transformed from subsistence farming to cotton production. By 1920, Wilson was a major player in the North Carolina tobacco economy and became known as the “World’s Largest Tobacco Market.” After the decline of tobacco in the late twentieth century, Wilson turned to other types of manufacturing. Today, Wilson’s citizens and leaders must work to reorient the economy in order to remain competitive. To do this, Wilson is focusing economic transformation on the theme of “Arts and Innovation.” The community is building off of its investment in a gigabit, high-speed internet network, national attention around cultural assets such as the Whirligig Park, and attraction of aerospace, finance, pharmaceutical, and automotive industries to the community.
A comprehensive quality assessment framework for scientific events
Creators: name: Vahdati, Sahar
name: Fathalla, Said
name: Lange, Christoph
name: Behrend, Andreas
name: Say, Aysegul
name: Say, Zeynep
name: Auer, Sören
Publisher: name: Dordrecht [u.a.] : Springer Science + Business Media B.V.
Year: 2020
Subjects: subject: Bibliometrics
subject: Metadata analysis
subject: Quality assessment
subject: Recommendation
subject: Scientific events
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: Systematic assessment of scientific events has become increasingly important for research communities. A range of metrics (e.g., citations, h-index) have been developed by different research communities to make such assessments effectual. However, most of the metrics for assessing the quality of less formal publication venues and events have not yet deeply investigated. It is also rather challenging to develop respective metrics because each research community has its own formal and informal rules of communication and quality standards. In this article, we develop a comprehensive framework of assessment metrics for evaluating scientific events and involved stakeholders. The resulting quality metrics are determined with respect to three general categories—events, persons, and bibliometrics. Our assessment methodology is empirically applied to several series of computer science events, such as conferences and workshops, using publicly available data for determining quality metrics. We show that the metrics’ values coincide with the intuitive agreement of the community on its “top conferences”. Our results demonstrate that highly-ranked events share similar profiles, including the provision of outstanding reviews, visiting diverse locations, having reputed people involved, and renowned sponsors. © 2020, The Author(s).
Minimal Ward-Takahashi Vertices and Pion Light Cone Distribution Amplitudes from Gauge Invariant, Nonlocal, Dynamical Quark Model
Creators: name: Li, Chuan
name: Jiang, Shao-Zhou
name: Wang, Qing
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The gauge-invariant, nonlocal, dynamical quark model is proved to generate the minimal vertices which satisfy the Ward-Takahashi identities. In the chiral limit, the momentum-dependent quark self-energy results in a flat-like form with some end point delta-funtions for the light-cone pion distribution amplitudes, similarly found in the Nambu Jona-Lasino model with constant constituent mass. The leading order nonzero pion and current quark masses corrections lead concave type asymptotic-like form modifications to twist-2 pion distribution amplitude with end point pillars and twist-3 tensor pion distribution amplitude above the flat-like form backgrounds. A by-product of our investigation shows that the variable u appearing in pion light-cone distribution amplitudes is just the standard Feynman parameter in the Feynman parameter integrals; also chiral perturbation works well for these amplitudes.
description: 8 pages
Continuum multiscale modeling of absorption processes in micro- and nanocatalysts
Creators: name: Köhler, Maximilian
name: Junker, Philipp
name: Balzani, Daniel
Publisher: name: Berlin ; Heidelberg [u.a.] : Springer
Year: 2022
Subjects: subject: Calibration
subject: Catalysis
subject: Multiscale diffusion
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: In this paper, we propose a novel, semi-analytic approach for the two-scale, computational modeling of concentration transport in packed bed reactors. Within the reactor, catalytic pellets are stacked, which alter the concentration evolution. Firstly, the considered experimental setup is discussed and a naive one-scale approach is presented. This one-scale model motivates, due to unphysical fitted values, to enrich the computational procedure by another scale. The computations on the second scale, here referred to as microscale, are based on a proper investigation of the diffusion process in the catalytic pellets from which, after continuum-consistent considerations, a sink term for the macroscopic advection–diffusion–reaction process can be identified. For the special case of a spherical catalyst pellet, the parabolic partial differential equation at the microscale can be reduced to a single ordinary differential equation in time through a semi-analytic approach. After the presentation of our model, we show results for its calibration against the macroscopic response of a simple standard mass transport experiment. Based thereon, the effective diffusion parameters of the catalyst pellets can be identified. © 2022, The Author(s).
Genome-wide association study identifies five new schizophrenia loci
Creators: name: Lin, Danyu
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: We examined the role of common genetic variation in schizophrenia in a genome-wide association study of substantial size: a stage 1 discovery sample of 21,856 individuals of European ancestry and a stage 2 replication sample of 29,839 independent subjects. The combined stage 1 and 2 analysis yielded genome-wide significant associations with schizophrenia for seven loci, five of which are new (1p21.3, 2q32.3, 8p23.2, 8q21.3 and 10q24.32-q24.33) and two of which have been previously implicated (6p21.32-p22.1 and 18q21.2). The strongest new finding (P = 1.6 × 10−11) was with rs1625579 within an intron of a putative primary transcript for MIR137 (microRNA 137), a known regulator of neuronal development. Four other schizophrenia loci achieving genome-wide significance contain predicted targets of MIR137, suggesting MIR137-mediated dysregulation as a previously unknown etiologic mechanism in schizophrenia. In a joint analysis with a bipolar disorder sample (16,374 affected individuals and 14,044 controls), three loci reached genome-wide significance: CACNA1C (rs4765905, P = 7.0 × 10−9), ANK3 (rs10994359, P = 2.5 × 10−8) and the ITIH3-ITIH4 region (rs2239547, P = 7.8 × 10−9).
A class of orthogonal functions given by a three term recurrence formula
Creators: name: Bracciali, Cleonice F.
name: McCabe, John H.
name: Pérez, Teresa E.
name: Ranga, A. Sri
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42C05

description: The main goal in this manuscript is to present a class of functions satisfying a certain orthogonality property for which there also exists a three term recurrence formula. This class of functions, which can be considered as an extension to the class of symmetric orthogonal polynomials on $[-1,1]$, has a complete connection to the orthogonal polynomials on the unit circle. Quadrature rules and other properties based on the zeros of these functions are also considered.
description: 20 pages, 2 figures
Prozess zur Entwicklung optomechatronischer Systeme
Creators: name: Knöchelmann, Marvin
Publisher: name: Garbsen : TEWISS Verlag
Year: 2020
Subjects: subject: Optomechatronics
subject: Product development process
subject: V-model
subject: cross-domain development
subject: Optomechatronik
subject: Entwicklungsprozess
subject: V-Modell
subject: Domänenübergreifende Entwicklung
subject: Dewey Decimal Classification::600 | Technik

description: Optische Strahlung ist allgegenwärtig und die Basis für die Aufnahme von Informationen für Menschen. Technische Systeme, die optische Strahlung emittieren oder detektieren, ermöglichen daher vielfältige Funktionen. Optische Systeme in Kombination mit mechanischen und elektronischen Funktionen sowie einer Informationsverarbeitung werden optomchatronische Systeme genannt. Die Entwicklung dieser Art von Systemen ist eine herausfordernde Ingenieurstätigkeit. Abhängigkeiten zwischen den Systemelementen müssen domänenübergreifend betrachtet werden. Die Wirkung emittierter Strahlung auf den Menschen kann Teil der Hauptfunktion des zu entwickelnden Systems sein, aber auch eine Gefährdung darstellen und muss daher explizit berücksichtigt werden. Getrieben durch die Halbleiterindustrie sind Entwicklungszyklen für Systeme, die Lichtquellen oder Detektoren aus Halbleitermaterialien enthalten, kurz. Um optomechatronische Systeme erfolgreich zu entwickeln und die vielfältigen Anforderungen und Rahmenbedingungen strukturiert zu berücksichtigen, ist daher ein methodisches Vorgehen erforderlich. In dieser Arbeit wird ein Prozess zur Entwicklung optomechatronischer Systeme vorgestellt. Diese Art von Systemen ähnelt mechatronischen Systemen, weshalb die Basis für den Prozess das V-Modell ist, das für mechatronische Entwicklungen in Industrieunternehmen und Forschungseinrichtungen etabliert ist. Der vorgestellte Prozess basiert auf dem V-Modell der VDI-Richtlinie 2206 und wird durch operative Arbeitsschritte konkretisiert. Die Anpassung des V-Modells ist notwendig, da, wie in der Arbeit dargestellt wird, die Domäne Optik sich maßgeblich von den klassischen Domänen der Mechatronik unterscheidet. Das allgemeine V-Modell wird daher durch Elemente aus Vorgehensmodellen zur Gestaltung optischer Systeme ergänzt. Weiterhin werden spezifische Methoden vorgestellt, welche die Entwicklung optomechatronischer Systeme unterstützen. Um den entwickelten Prozess zu veranschaulichen, werden die Arbeitsschritte anhand eines Beispiels aus der Fahrzeuglichttechnik demonstriert. Abschließend wird aufgezeigt, für welche optomechatronischen Systeme der Prozess anwendbar ist und wie dieser erweitert werden kann.
Bayesian Inversion with Open-Source Codes for Various One-Dimensional Model Problems in Computational Mechanics
Creators: name: Noii, Nima
name: Khodadadian, Amirreza
name: Ulloa, Jacinto
name: Aldakheel, Fadi
name: Wick, Thomas
name: François, Stijn
name: Wriggers, Peter
Publisher: name: Dordrecht [u.a.] ; Berlin ; Heidelberg : Springer
Year: 2022
Subjects: subject: Computational mechanics
subject: Markov processes
subject: MATLAB
subject: Monte Carlo methods
subject: Open source software
subject: Open systems
subject: Bayesian inversion
subject: Forward modeling
subject: Materials parameters
subject: Model problems
subject: Modeling parameters
subject: One-dimensional model
subject: Open-source code
subject: Programming codes
subject: Simulation response
subject: Simulation systems
subject: Boundary value problems
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: The complexity of many problems in computational mechanics calls for reliable programming codes and accurate simulation systems. Typically, simulation responses strongly depend on material and model parameters, where one distinguishes between backward and forward models. Providing reliable information for the material/model parameters, enables us to calibrate the forward model (e.g., a system of PDEs). Markov chain Monte Carlo methods are efficient computational techniques to estimate the posterior density of the parameters. In the present study, we employ Bayesian inversion for several mechanical problems and study its applicability to enhance the model accuracy. Seven different boundary value problems in coupled multi-field (and multi-physics) systems are presented. To provide a comprehensive study, both rate-dependent and rate-independent equations are considered. Moreover, open source codes (https://doi.org/10.5281/zenodo.6451942) are provided, constituting a convenient platform for future developments for, e.g., multi-field coupled problems. The developed package is written in MATLAB and provides useful information about mechanical model problems and the backward Bayesian inversion setting. © 2022, The Author(s).
Identities involving Laguerre polynomials derived from umbral calculus
Creators: name: Kim, Taekyun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B68, 11S80

description: In this paper, we investigate some identities of Laguerre polynomials involving Bernoulli and Euler polynomials which are derived from umbral calculus.
description: 12 pages
The Trouble With Storms
Creators: name: Stephenson, Jim
name: Miller, Todd
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2000

description: As Hurricane Floyd buffeted the Bahamas on September 13. 1999. many North Carolinians were quietly wishing that the storm would head due west. But it didn't. After brushing by Florida. Georgia and South Carolina. Floyd came ashore near Wilmington. North Carolina, on September 15. Eastern North Carolina was still soaked from a week long encounter with Hurricane Dennis that lingered off Cape Hatteras for days before making a return visit to the mainland at Cedar Island. By the time Hurricane Floyd rushed through the state, the rivers were already swollen and the soils saturated. There was nowhere for Floyd's waters to go. Hurricane Floyd has been tagged the worst disaster in North Carolina history. Whole towns were inundated by flood waters carrying everything from gasoline and oil slicks to hog carcasses and caskets downstream. Rainwater that collected in the floodplains of the Tar, Neuse, and Roanoke rivers displaced, and in some places destroyed, the communities and industries in these fragile areas. Along the coast, the barrier islands protected the mainland from Hurricane Floyd's wrath. Oak Island had the greatest structural damage from Floyd, with 50 homes and vacation properties destroyed or substantially damaged. Erosion on Core Banks, including Emerald Isle, Pine Knoll Shores and Atlantic Beach, caused the beach to migrate from 15 feet to 50 feet landward. On Emerald Isle. 157 homes are now imminently threatened. On Topsail, Surf City and North Topsail Islands, oceanfront dunes and berms built in the aftermath of Fran were washed away.
Galaxy And Mass Assembly (GAMA): The connection between metals, specific-SFR, and HI gas in galaxies: the Z-SSFR relation
Creators: name: Lara-López, M. A.
name: Hopkins, A. M.
name: López-Sánchez, A. R.
name: Brough, S.
name: Bland-Hawthorn, M. Colless J.
name: Driver, S.
name: Foster, C.
name: Liske, J.
name: Loveday, J.
name: Robotham, A. S. G.
name: Sharp, R. G.
name: Steele, O.
name: Taylor, E. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the interplay between gas phase metallicity (Z), specific star formation rate (SSFR) and neutral hydrogen gas (HI) for galaxies of different stellar masses. Our study uses spectroscopic data from GAMA and SDSS star forming galaxies, as well as HI-detection from the ALFALFA and GASS public catalogues. We present a model based on the Z-SSFR relation that shows that at a given stellar mass, depending on the amount of gas, galaxies will follow opposite behaviours. Low-mass galaxies with a large amount of gas will show high SSFR and low metallicities, while low-mass galaxies with small amounts of gas will show lower SSFR and high metallicities. In contrast, massive galaxies with a large amount of gas will show moderate SSFR and high metallicities, while massive galaxies with small amounts of gas will show low SSFR and low metallicities. Using ALFALFA and GASS counterparts, we find that the amount of gas is related to those drastic differences in Z and SSFR for galaxies of a similar stellar mass.
description: Accepted for publication as a letter in MNRAS. 5 pages and 4 figures
A cover-based contact detection approach for irregular convex polygons in discontinuous deformation analysis
Creators: name: Zhuang, Xioaying
name: Zheng, Fei
name: Zheng, Hong
name: Jiao, Yu-Yong
name: Rabczuk, Timon
name: Wriggers, Peter
Publisher: name: New York, NY [u.a.] : Wiley
Year: 2021
Subjects: subject: contact cover
subject: discontinuous deformation analysis
subject: entrance block
subject: irregular polygon
subject: small angle
subject: small edge
subject: Deformation
subject: Efficiency
subject: Iterative methods
subject: Contact analysis
subject: Contact constraint
subject: Contact detection
subject: Contact simulation
subject: Critical effects
subject: Discontinuous deformation analysis
subject: Open-close iterations
subject: Potential contacts
subject: Geometry
subject: deformation
subject: deformation mechanism
subject: detection method
subject: efficiency measurement
subject: polygon
subject: three-dimensional modeling
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Irregular polygon shapes (eg, with small edges or small angles) are usually encountered in the contact simulation of discrete block systems. Treatment of irregular polygons in contact detection process has critical effects on the robustness and efficiency of the discontinuous computation approach. The present work proposes a cover-based strategy to detect and solve contacts of irregular convex polygons in a robust and efficient way. Contact constraints of two polygons are represented by vertex-edge and edge-vertex contact covers in 2D. Two loops, namely vertex-edge loop and edge-vertex loop, and two filter criteria, namely the entrance filter criterion and the distance filter criterion, are used to establish the potential contact cover list of two neighbor polygons. The initial active and closed contact covers are chosen based on block configuration at the beginning of the step and they are then updated in the open-close iteration process using proposed criteria. This strategy is implemented in discontinuous deformation analysis. The robustness of the proposed cover-based approach and the conventional type-based approach in handling contact of irregular blocks is verified first. Then, the contact analysis efficiency of the cover-based approach with different contact tolerances is evaluated. This cover-based method can be extended to 3D case for efficient and robust contact analysis of irregular polyhedral blocks. © 2020 The Authors. International Journal for Numerical and Analytical Methods in Geomechanics published by John Wiley & Sons Ltd
title: Beyond the river – Mesolithic camps in Siebenlinden 3, 4 and 5 (Rottenburg am Neckar, Lkr. Tübingen)
Creators: name: Kind, Claus-Joachim
Publisher: name: University Library Heidelberg
Year: 2016

description: Die mesolithische Fundstelle Siebenlinden 3-5 wurde zwischen 1993 und 1995 sowie 2001 und 2004 auf einer Fläche von insgesamt 480 m² ausgegraben. Hierbei wurden vier Fundhorizonte aus dem mittleren und jüngeren Mesolithikum entdeckt. Der Horizont II ist das Produkt eines größeren Sommer- oder Herbstlagers. Verschiedenartige Arbeitsplätze können differenziert werden, die zeitgleich genutzt wurden. Auch der Horizont III kann als Hinterlassenschaft eines intensiv genutzten und längerfristig besiedelten Hauptlagers angesehen werden. Die Fundkonzentrationen können als Arbeitsplätze, mutmaßliche Wohnbereiche und Nebenarbeitsplätze identifiziert werden. Jeweils einer der Arbeitsplätze und einer der Wohnbereiche sowie einer oder zwei der Nebenarbeitsplätze gehören zusammen zu einer Wohneinheit. Die Fundstreuungen aus den Horizonten IIIo und IV haben dagegen einen grundsätzlich anderen Charakter: Sie sind bei Weitem fundärmer und gehören zu kurzfristigen Lagerplätzen, die aus unterschiedlichen Zwecken, hauptsächlich zur Requirierung von Nahrungsmitteln, eingerichtet wurden. Die Nutzung von Steinartefakten im Horizont IV zeigt hierbei, dass in zwei Fällen jeweils zwei der Fundkonzentrationen zeitgleich besiedelt wurden.
Die Unterschiede in der Form der Lagerplätze sind durch die unterschiedliche Form der Nutzung in unterschiedlich strukturierten Siedlungsformen bedingt. Zwischen Früh- und Spätmesolithikum scheint sich allerdings ein markanter Wandel in der sozialen Struktur vollzogen zu haben.
description: An area of all together 480m2 of the Mesolithic site Siebenlinden 3-5 was excavated between 1993 and 1995 as well as between 2001 and 2004. Four layers with finds dating to the middle to younger Mesolithic were discovered. Horizon II is the result of a larger summer or autumn camp. Different workplaces which were used simultaneously are identified. Horizon III can also be interpreted as an intensively used main camp established for a longer period. It is possible to differentiate between workplaces, presumed living areas and side workplaces. One dwelling unit always consists of one of the workplaces, one of the living areas and one or two side workplaces. In contrast to this the find scatters of horizons IIIo and IV are of fundamentally different character. They possess less finds by far and belong to camps of shorter permanence having been built for various purposes, but mainly for the requisition of food. The use of stone artefacts in horizon IV shows that in two cases two of the find concentrations indicate two contemporary living areas.
The differences of the camp shapes originate in the different uses of the settlement types of differing structures. However, between the early and late Mesolithic a distinctive change seems to have taken place in the social structure.
Recording of Gail Mary Killian's birthday (Gail's birthday, 1982)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2020
Subjects: Birthday parties
Down syndrome--Social aspects
Video arcades
Rock music
Polish people--Music
Polish Americans--Social life and customs

description: Recording documents Gail Mary Killian's birthday celebration. Topics discussed include a neighbor's granddaughter being accepted to Yale University, increased Portuguese immigration to Taunton, and talk of a new video arcade in town that has Ms. Pac-Man and Space Invaders.
A forecast comparison of volatility models: Does anything beat a GARCH(1,1)?
Creators: name: Hansen, Peter R.
name: Lunde, Asger
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005

description: We compare 330 ARCH‐type models in terms of their ability to describe the conditional variance. The models are compared out‐of‐sample using DM–$ exchange rate data and IBM return data, where the latter is based on a new data set of realized variance. We find no evidence that a GARCH(1,1) is outperformed by more sophisticated models in our analysis of exchange rates, whereas the GARCH(1,1) is clearly inferior to models that can accommodate a leverage effect in our analysis of IBM returns. The models are compared with the test for superior predictive ability (SPA) and the reality check for data snooping (RC). Our empirical results show that the RC lacks power to an extent that makes it unable to distinguish ‘good’ and ‘bad’ models in our analysis.
Matter mixing in aspherical core-collapse supernovae: a search for possible conditions for conveying $^{56}$Ni into high velocity regions
Creators: name: Ono, Masaomi
name: Nagataki, Shigehiro
name: Ito, Hirotaka
name: Lee, Shiu-Hang
name: Mao, Jirong
name: Hashimoto, Masa-aki
name: Tolstov, Alexey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We perform two-dimensional axisymmetric hydrodynamic simulations of matter mixing in aspherical core-collapse supernova explosions of a 16.3 $M_{\odot}$ star with a compact hydrogen envelope. Observations of SN 1987A have provided evidence that $^{56}$Ni synthesized by explosive nucleosynthesis is mixed into fast moving matter ($\gtrsim$ 3,500 km s$^{-1}$) in the exploding star. In order to clarify the key conditions for reproducing such high velocity of $^{56}$Ni, we revisit matter mixing in aspherical core-collapse supernova explosions. Explosions are initiated artificially by injecting thermal and kinetic energies around the interface between the iron core and the silicon-rich layer. Perturbations of 5% or 30% amplitude in the radial velocities are introduced at several points in time. We found that no high velocity $^{56}$Ni can be obtained if we consider bipolar explosions with perturbations (5% amplitude) of pre-supernova origins. If large perturbations (30% amplitude) are introduced or exist due to some unknown mechanism in a later phase just before the shock wave reaches the hydrogen envelope, $^{56}$Ni with a velocity of 3,000 km s$^{-1}$ can be obtained. Aspherical explosions that are asymmetric across the equatorial plane with clumpy structures in the initial shock waves are investigated. We found that the clump sizes affect the penetration of $^{56}$Ni. Finally, we report that an aspherical explosion model that is asymmetric across the equatorial plane with multiple perturbations of pre-supernova origins can cause the penetration of $^{56}$Ni clumps into fast moving matter of 3,000 km s$^{-1}$. We show that both aspherical explosion with clumpy structures and perturbations of pre-supernova origins may be necessary to reproduce the observed high velocity of $^{56}$Ni. To confirm this, more robust three-dimensional simulations are required.
description: 29 pages, 28 figures, 2 tables, submitted in ApJ
On a virtual element formulation for trusses and beams
Creators: name: Wriggers, Peter
Publisher: name: Berlin ; Heidelberg [u.a.] : Springer
Year: 2022
Subjects: subject: Euler–Bernoulli beams
subject: Higher-order ansatz
subject: Large deflections
subject: trusses
subject: Virtual element method (VEM)
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: The virtual element method (VEM) was developed not too long ago, starting with the paper [2] related to elasticity in solid mechanics. The virtual element method allows to revisit the construction of different elements; however, it has so far not applied to one-dimensional structures like trusses and beams. Here we study several VEM elements suitable for trusses and beams and show that the virtual element methodology produces elements that are equivalent to well-known finite elements but also elements that are different, especially for higher-order ansatz functions. It will be shown that these elements can be easily incorporated in classical finite element codes since they have the same number of unknowns as finite beam elements. Furthermore, the formulation allows to compute nonlinear structural problems undergoing large deflections and rotations. © 2022, The Author(s).
Carbon in the Draco Dwarf Spheroidal Galaxy
Creators: name: Shetrone, Matthew D.
name: Smith, Graeme H.
name: Stanford, Laura M.
name: Siegel, Michael H.
name: Bond, Howard E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Measurements of [C/Fe], [Ca/H], and [Fe/H] have been derived from Keck I LRISb spectra of 35 giants in the Draco dwarf spheroidal galaxy. The iron abundances are derived by a spectrum synthesis modeling of the wavelength region from 4850 to 5375 A, while calcium and carbon abundances are obtained by fitting the Ca II H and K lines and the CH G band respectively. A range in metallicity of -2.9 <= [Fe/H]} <= -1.6 is found within the giants sampled, with a good correlation between [Fe/H] and [Ca/H]. The great majority of stars in the sample would be classified as having weak absorption in the lambda 3883 CN band, with only a small scatter in band strengths at a given luminosity on the red giant branch. In this sense the behavior of CN among the Draco giants is consistent with the predominantly weak CN bands found among red giants in globular clusters of metallicity [Fe/H] < -1.8. Over half of the giants in the Draco sample have [Fe/H] > -2.25, and among these there is a trend for the [C/Fe] abundance to decrease with increasing luminosity on the red giant branch. This is a phenomenon that is also seen among both field and globular cluster giants of the Galactic halo, where it has been interpreted as a consequence of deep mixing of material between the base of the convective envelope and the outer limits of the hydrogen-burning shell. However, among the six Draco giants observed that turn out to have metallicities -2.65 < [Fe/H] < -2.25 there is no such trend seen in the carbon abundance. This may be due to small sample statistics or primordial inhomogeneities in carbon abundance among the most metal-poor Draco stars. We identify a potential carbon-rich extremely metal-poor star in our sample. This candidate will require follow up observations for confirmation.
description: accepted in AJ
Carolina Forum: North Carolina Planners: License, Register, or Certify?; Downtown Revitalization Through Public-Private Cooperation in Greenville, South Carolina
Creators: name: Leary, Robert M.
name: Paulson, David R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1977

description: Carolina forum, a new feature, presents reports of recent or ongoing planning activities and opinions on current planning issues. We welcome submissions to Carolina forum from all interested persons—especially practicing planners in the Southeast. This forum includes two reports: NORTH CAROLINA PLANNERS: LICENSE, REGISTER, OR CERTIFY?: With the close of this 1977 session, the North Carolina General Assembly has not taken action which affects the question of whether planning or planners need to be regulated by the state. However, the lawmakers have taken some action to examine the need for and the operating characteristics of some of the boards and commissions set up in the past to regulate a plethora of occupations, ranging from physicians to auctioneers. This study, conducted by the Justice Department, is at its midpoint. When completed, it is expected to produce recommendations for adjustments in the composition and operating practices of the present boards and recommended guidelines for the establishment of any new regulatory bodies. And DOWNTOWN REVITALIZATION THROUGH PUBLIC-PRIVATE COOPERATION IN GREENVILLE, SOUTH CAROLINA: The plight of downtown Greenville, South Carolina, has not differed greatly from that of many other central-city areas throughout the country. Fifteen years ago, it was a bustling center of commercial and business activity. It housed four major department stores as well as dozens of offices and small retail facilities. Evening functions were as prevalent as daytime affairs. It was a Saturday tradition to shop downtown. However, with suburbanization and growth of retail malls, the importance of the downtown as a shopping district declined. In the early 1970's, two of the four downtown department stores fled to a climate controlled shopping center, as did numerous smaller businesses which traditionally rely upon the drawing power of larger establishments. In addition, many buildings in the central city became plagued by vandalism and neglect. There were often complaints of inadequate parking facilities and poor quality merchandising. Although it was to remain the hub of governmental, cultural, and banking concerns, the downtown's heyday as a commercial district was clearly passed by the early 1970's.
A fast multigrid-based electromagnetic eigensolver for curved metal boundaries on the Yee mesh
Creators: name: Bauer, Carl A.
name: Werner, Gregory R.
name: Cary, John R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: For embedded boundary electromagnetics using the Dey-Mittra algorithm, a special grad-div matrix constructed in this work allows use of multigrid methods for efficient inversion of Maxwell's curl-curl matrix. Efficient curl-curl inversions are demonstrated within a shift-and-invert Krylov-subspace eigensolver (open-sourced at https://github.com/bauerca/maxwell) on the spherical cavity and the 9-cell TESLA superconducting accelerator cavity. The accuracy of the Dey-Mittra algorithm is also examined: frequencies converge with second-order error, and surface fields are found to converge with nearly second-order error. In agreement with previous work, neglecting some boundary-cut cell faces (as is required in the time domain for numerical stability) reduces frequency convergence to first-order and surface-field convergence to zeroth-order (i.e. surface fields do not converge). Additionally and importantly, neglecting faces can reduce accuracy by an order of magnitude at low resolutions.
description: Reviewed by and resubmitted to the Journal of Computational Physics, Elsevier. 23 pages, 6 figures, 3 tables
Recording of Gail Mary Killian's birthday (1973)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2020
Subjects: Birthday parties
Down syndrome--Social aspects
Polkas
Polish people--Social life and customs

description: Recording documents Gail Mary Killian's birthday celebration. There is a conversation about work for the United States Postal Service, as Killian's father and neighbor worked for the USPS. Guests sing "Happy Birthday." There is also a conversation about polka music and dancing, both of which were popular in her neighborhood, which was a Polish enclave.
Ghana ThinkTank at Fusebox Festival, Austin, TX
Creators: name: Robbins, Christopher
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: The Carolina Planning Journal solicited this article from the artists’ group, Ghana ThinkTank, in the hopes that it would expose planners around North Carolina to the artist’s perspective as well as ways in which artists may expand and interrogate the process of participation.
title: A La Tène decorative stud of the Plastic Style
Creators: name: Müller, Felix
Publisher: name: University Library Heidelberg
Year: 2016

description: Der kalottenförmige Bronzeknopf mit eiserner Öse besitzt einen Durchmesser von nur 3,5 cm. Eine unbestätigte Herkunftsangabe nennt »untere Donau«. Die hervorragend erhaltene Oberfläche trägt einen Dreiwirbel im Plastischen Stil (3. Jh. v. Chr.). Erkennbar ist das sich dreimal wiederholende Auge eines raubvogelartigen Tieres. Knöpfe dieser Form konnten als Schildbeschläge und als Panzerverschlüsse dienen, sie stammen jedenfalls immer aus Kriegergräbern. Eine Herkunft des vorgelegten Knopfes aus dem unteren Donauraum scheint möglich.
description: The bronze calotte-shaped stud with an iron loop is 3.5 cm in diameter. Though the »Lower Danube« is named as its origin, this information remains unconfirmed. The exceptionally well-preserved surface shows a triskele in the Plastic Style (3rd cent. BC). Three repetitions of the eye of a bird of prey-like animal can be recognized. Studs of this type can be used as shield fittings and as fastenings of armor; they always come from warrior graves. The origin of the presented stud from the Lower Danube seems possible.
Erzeugung und Untersuchung dunkler Solitonen in Bose-Einstein Kondensaten
Creators: name: Burger, Sven
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Bose-Einstein condensation
subject: solitons in matter waves
subject: atom optics
subject: Atomoptik
subject: Bose-Einstein-Kondensation
subject: Rubidium-87
subject: Soliton
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Direct Numerical Simulation of Electrokinetic Instability and Transition to Chaotic Motion
Creators: name: Demekhin, E. A.
name: Nikitin, N. V.
name: Shelistov, V. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A new type of instability - electrokinetic instability - and an unusual transition to chaotic motion near a charge-selective surface was studied by numerical integration of the Nernst-Planck-Poisson-Stokes system and a weakly nonlinear analysis near the threshold of instability. Two kinds of initial conditions were considered: (a) white noise initial conditions to mimic "room disturbances" and subsequent natural evolution of the solution; (b) an artificial monochromatic ion distribution with a fixed wave number to simulate regular wave patterns. The results were studied from the viewpoint of hydrodynamic stability and bifurcation theory. The threshold of electroconvective movement was found by the linear spectral stability theory, the results of which were confirmed by numerical simulation of the entire system. The following regimes, which replace each other as the potential drop between the selective surfaces increases, were obtained: one-dimensional steady solution; two-dimensional steady electroconvective vortices (stationary point in a proper phase space); unsteady vortices aperiodically changing their parameters (homoclinic contour); periodic motion (limit cycle); and chaotic motion. The transition to chaotic motion did not include Hopf bifurcation. Numerical resolution of the thin concentration polarization layer showed spike-like charge profiles along the surface, which could be, depending on the regime, either steady or aperiodically coalescent. The numerical investigation confirmed the experimentally observed absence of regular (near-sinusoidal) oscillations for the overlimiting regimes. There is a qualitative agreement of the experimental and the theoretical values of the threshold of instability, the dominant size of the observed coherent structures, and the experimental and theoretical volt-current characteristics.
description: 34 pages, 12 figures (in color), 37 references
The Myth of Balanced Growth: Redistributing North Carolina's Infrastructure Dollars
Creators: name: Mavretic, Josephus
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1988

description: According to Josephus Mavretic, Representative of the Eighth District in the North Carolina General Assembly, the public revenue structure must be changed. Current tax policies ensure that those rural counties most in need of infrastructure will be least able to afford it. In 1989, the General Assembly will have the opportunity to restructure the system of taxation. In this piece, Mavretic outlines the state's alternatives in providing for the equitable distribution of financial resources for infrastructure.