cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective properties of composites with periodic random packing of ellipsoids
Creators: name: Zhuang, Xiaoying
name: Wang, Qing
name: Zhu, Hehua
Publisher: name: Basel : MDPI AG
Year: 2017
Subjects: subject: Composite properties
subject: Computational homogenization
subject: Molecular dynamics
subject: Multiscale modelling
subject: Random periodic packing
subject: Composite materials
subject: Computational chemistry
subject: Packing
subject: Volume fraction
subject: Effective properties of composites
subject: Effective property
subject: High volume fraction
subject: Multi-scale modelling
subject: Aspect ratio
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The aim of this paper is to evaluate the effective properties of composite materials with periodic random packing of ellipsoids of different volume fractions and aspect ratios. Therefore, we employ computational homogenization. A very efficient MD-based method is applied to generate the periodic random packing of the ellipsoids. The method is applicable even for extremely high volume fractions up to 60%. The influences of the volume fraction and aspect ratio on the effective properties of the composite materials are studied in several numerical examples.
Najas minor L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. minor L. Cat. 333. Bis 2000 m. 3: Ecône (J.); Riddes (J.); Villy (F.); ob Törbel,2000m (Stebler).- 4:Fiesch(nach Wilczek).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Comparative study of achievable quality cutting carbon fibre reinforced thermoplastics using continuous wave and pulsed laser sources
Creators: name: Bluemel, S.
name: Jaeschke, P.
name: Suttmann, O.
name: Overmeyer, L.
Publisher: name: Amsterdam : Elsevier B.V.
Year: 2014
Subjects: subject: CFRP
subject: Laser cutting
subject: Thermoplastic
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Laser cutting of CFRP lightweight parts has the advantages of a contact-free, automatable and flexible processing for a prospective series production. For the development of strategies for laser cutting of carbon fibre reinforced plastics (CFRP), different scientific approaches exist to achieve a process with small heat affected zones (HAZ), and high cutting rates. Within this paper a cw laser, a nanosecond and a picosecond laser source emitting in the near infrared range have been used in combination with a scanning system to cut CFRP with a thermoplastic matrix. The influence of the scanning speed on the size of the HAZ and the corresponding tensile strength were investigated for each laser source. Furthermore, the authors compared the achievable HAZ and the effective cutting speeds of the different setups in order to evaluate the efficiency and quality of the chosen strategies. The results show that a nanosecond pulsed laser source with high average power is a good trade-off between attainable quality and cutting rate.
Essays on fractional cointegration and long memory time series
Creators: name: Mboya, Mwasi
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2022
Subjects: subject: Long Memory
subject: Fractional Cointegration
subject: Structural Break
subject: Langes Gedächtnis
subject: Fraktionale Kointegration
subject: Strukturbruch
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: This dissertation contains three essays on distinguishing between structural breaks under long memory, testing for fractional cointegration relationship between the financial markets and developing optimal forecast methods under long memory in the presence of a discrete structural break. Chapter 1 introduces the concepts of long memory, fractional cointegration and briefly describes the rest of the chapters. Chapter 2 suggests a testing procedure to discriminate between stationarity, a break in the mean and a break in persistence in a time series that may exhibit long memory is introduced. The asymptotic properties of test statistics based on the CUSUM statistic are studied. In a Monte Carlo study we further analyze the finite sample properties of the procedure. An application to inflation rates shows the potential of our procedure for future research. Chapter 3 revisits the question whether volatilities of different markets and trading zones have a long-run equilibrium in the sense that they are fractionally cointegrated. We consider the U.S., Japanese and German stock, bond and foreign exchange markets to see whether there is fractional cointegration between the markets in one trading zone or for one market across trading zones. Also the other combinations of different markets in different trading zones are considered. Applying a purely semiparametric approach through the whole analysis shows fractional cointegration can only be found for a small minority of different cases. Investigating further we find that all volatility series show persistence breaks during the observation period which may be a reason for different findings in previous studies. Finally, we develop methods in Chapter 4 to obtain optimal forecast under long memory in the presence of a discrete structural break based on different weighting schemes for the observations. We observe significant changes in the forecasts when long-range dependence is taken into account. Using Monte Carlo simulations, we confirm that our methods substantially improve the forecasting performance under long memory. We further present an empirical application to inflation rates that emphasizes the importance of our methods.
title: Klassifikationsverfahren
Creators: name: Meiser, Thorsten
name: Humburg, Stefanie
Publisher: name: Universitätsbibliothek Mannheim
Year: 1996

description: Digitalisierte Ausgabe 2019. Gedruckt erschienen im Handbuch Quantitative Methoden (1996), hrsg. von Edgar Erdfelder, Rainer Mausfeld, Thorsten Meiser und Georg Rudinger, beim Beltz-Verlag (Weinheim), ISBN 3-621-27280-1.
Type I planet migration in weakly magnetised laminar discs
Creators: name: Guilet, Jerome
name: Baruteau, Clement
name: Papaloizou, John C. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: [Abridged] The migration of low mass planets has been studied in hydrodynamical disc models for more than three decades, but the impact of a magnetic field in the protoplanetary disc is less known. When the disc's magnetic field is strong enough to prevent horseshoe motion, the corotation torque is replaced by a torque arising from magnetic resonances. For weak enough magnetic fields, horseshoe motion and a corotation torque exist, and recent turbulent MHD simulations have reported the existence of a new component of the corotation torque in the presence of a mean toroidal field. The aim of this paper is to investigate the physical origin and the properties of this new corotation torque. We performed MHD simulations of a low mass planet embedded in a 2D laminar disc threaded by a weak toroidal magnetic field, with the effects of turbulence modelled by a viscosity and a resistivity. We confirm that the interaction between the magnetic field and the horseshoe motion results in an additional corotation torque on the planet, which we dub the MHD torque excess. It is caused by the accumulation of the magnetic field along the downstream separatrices of the planet's horseshoe region, which gives rise to an azimuthally asymmetric underdense region at that location. The properties of the MHD torque excess are characterised by varying the slope of the density, temperature and magnetic field profiles, as well as the diffusion coefficients and the strength of the magnetic field. The sign of the MHD torque excess depends on the density and temperature gradients only, and is positive for profiles expected in protoplanetary discs. Its magnitude is in turn mainly determined by the strength of the magnetic field and the turbulent resistivity. The MHD torque excess can be strong enough to reverse migration, even when the magnetic pressure is less than one percent of the thermal pressure.
description: 21 pages, 20 figures, accepted for publication in MNRAS
title: Дизайн газеты начала XX века: «Звезда» Новгородской губернии (1922―1924)
Creators: name: Василенко, Ирина
name: Василенко, Екатерина
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Статья продолжает обзор дизайнерских решений газеты «Звезда» Новгородской губернии в начале ее работы. Особенности внешнего оформления издания менялись в зависимости как от редакционной политики, так и от технологических возможностей провинциальной редакции. Усиление визуальной составляющей в оформлении газеты, в отличие от периода 1918―1921 годов, появление новых дизайнерских элементов ― всё работало на привлечение внимания читателя к ежедневному информационному изданию.
Möglichkeiten und Grenzen einer modernen Regierungslehre : Regierungshandeln im nationalen und europäischen Kontext ; Studien zu einem unvollendeten Projekt der deutschen Politikwissenschaft
Creators: name: Nehls, Björn
Publisher: name: Hannover : Universität
Year: 2002
Subjects: subject: Government
subject: political science
subject: nation state
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::320 | Politik

description: [no abstract]
title: Твит-новости как элемент конфликтного дискурса (на примере британских интернет-СМИ)
Creators: name: Кокконен, Елена
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Рассматриваются твит-новости BBC News как реализация конфликтных стратегий и тактик для достижения оппонентами своих целей. Негативные речевые и эмоциональные реакции позволяют судить об интенциях адресата и реципиента, динамике развития конфликта и его вариативности. Анализируются городской, спортивный, феминистский, повседневный дискурсы, поскольку конфликтный дискурс является смысловым, потенциально присутствуя в медиаполе и пронизывая все тематические дискурсы.
The Surprising Absence of Absorption in the Far-Ultraviolet Spectrum of Mrk 231
Creators: name: Veilleux, S.
name: Trippe, M.
name: Hamann, F.
name: Rupke, D. S. N.
name: Tripp, T. M.
name: Netzer, H.
name: Lutz, D.
name: Sembach, K. R.
name: Krug, H.
name: Teng, S. H.
name: Genzel, R.
name: Maiolino, R.
name: Sturm, E.
name: Tacconi, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Mrk 231, the nearest (z = 0.0422) quasar, hosts both a galactic-scale wind and a nuclear-scale iron low-ionization broad absorption line (FeLoBAL) outflow. We recently obtained a far-ultraviolet (FUV) spectrum of this object covering ~1150 - 1470 A with the Cosmic Origins Spectrograph on board the Hubble Space Telescope. This spectrum is highly peculiar, highlighted by the presence of faint (~< 2% of predictions based on H-alpha), broad (>~ 10,000 km/s at the base), and highly blueshifted (centroid at ~ -3500 km/s) Ly-alpha emission. The FUV continuum emission is slightly declining at shorter wavelengths (consistent with F_lambda ~ lambda^1.7) and does not show the presence of any obvious photospheric or wind stellar features. Surprisingly, the FUV spectrum also does not show any unambiguous broad absorption features. It thus appears to be dominated by the AGN, rather than hot stars, and virtually unfiltered by the dusty FeLoBAL screen. The observed Ly-alpha emission is best explained if it is produced in the outflowing BAL cloud system, while the Balmer lines arise primarily from the standard broad emission line region seen through the dusty (A_V ~ 7 mag.) broad absorption line region. Two possible geometric models are discussed in the context of these new results.
description: 28 pages, 6 figures, 1 table; accepted for publication in the Astrophysical Journal
Yeast 26S rRNA training feature classifiers
Creators: name: Akinyemi, Muiz Oluwatosin
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310201
subject: Bioinformatic methods development
classificationCode: 310799
subject: Microbiology not elsewhere classified
classificationCode: 310206
subject: Sequence analysis

description: This collection was curated in 2019 from NCBI
title: Музей в медиапространстве региона: жанры, инфоповоды и комментарии
Creators: name: Рыжкова, Ольга
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: В статье исследуется положение арт-журналистики в региональных общественно-политических медиа. Музей, как научный институт, сохраняющий историческое наследие, приобретает новый статус. Заинтересованность учреждений культуры в привлечении аудитории порождает включение СМИ в деятельность музея. В этом взаимодействии формируются информационные запросы и жанровая система, идет поиск актуальных форм подачи материала.
Chemobiosynthese von neuen Terpenoiden
Creators: name: Tran, Cong Duc
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2022
Subjects: subject: terpenes
subject: terpenoids
subject: sesquiterpenes
subject: biotransformation
subject: sesquiterpene cyclases
subject: unnatural diphosphates
subject: synthesis
subject: Terpene
subject: Sesquiterpene
subject: Terpenoide
subject: Biotransformation
subject: Sesquiterpenzyklasen
subject: unnatürliche Diphosphate
subject: Synthese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Terpenes represent the largest and structurally most diverse group of natural products. Since ancient times, humans have used terpenes contained in essential oils as medicinal agents, preservatives, and fragrances in their everyday life. Nowadays they are used in many scientific, industrial, and medical fields for their diverse properties. In the perfume and food industries, for example, sesquiterpenes in particular are used for their characteristic fragrances and flavors. In the ongoing search for new terpenes with sensory properties and biological activity, enzyme catalyzed biotransformations represent an exciting and efficient approach. Synthetically accessed, non natural linear terpenoids can be used as precursors for terpene cyclases to obtain various cyclic products. By using different enzymes, it is also possible to obtain multiple different products starting from the same substrate. In this dissertation, the synthesis of nine non natural linear farnesyl pyrophosphate derivatives and their subsequent application as substrates in biotransformations with eight selected heterologously expressed sesquiterpene cyclases is presented. The generated novel cyclization products were isolated, purified, and their structure elucidated. The information obtained from these results was used to investigate the cyclization mechanisms and substrate flexibility of the enzymes used.
Dynamics of an atom cavity field system in interacting Fock space
Creators: name: Das, P. K.
name: Chatterjee, Arpita
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81V80

description: In this paper, we investigate one-time passing of a $V$-type three-level atom through a single-mode interacting field in a cavity. We extend the idea of elementary Jaynes-Cummings model by assuming that the field vector belongs to interacting Fock space. In the process, we arrive at a state vector which will be analyzed to study the nonclassicality of the evolved state of the system.
description: 14 pages, 5 figures
Natural optical activity and its control by electric field in electrotoroidic systems
Creators: name: Prosandeev, Sergey
name: Malashevich, Andrei
name: Gui, Zhigang
name: Louis, Lydie
name: Walter, Raymond
name: Souza, Ivo
name: Bellaiche, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose the existence, via analytical derivations, novel phenomenologies, and first-principles-based simulations, of a new class of materials that are not only spontaneously optically active, but also for which the sense of rotation can be switched by an electric field applied to them-- via an induced transition between the dextrorotatory and laevorotatory forms. Such systems possess electric vortices that are coupled to a spontaneous electrical polarization. Furthermore, our atomistic simulations provide a deep microscopic insight into, and understanding of, this class of naturally optically active materials.
description: 3 figures
Geodetic-Gravimetric monitoring of mountain uplift and hydrological variations at zugspitze and wank mountains (Bavarian Alps, Germany)
Creators: name: Timmen, Ludger
name: Gerlach, Christian
name: Rehm, Till
name: Völksen, Christof
name: Voigt, Christian
Publisher: name: Basel : MDPI AG
Year: 2021
Subjects: subject: Absolute gravimetry
subject: Alpine mountain building
subject: FG5 free‐fall gravimeter
subject: Glacier retreat
subject: GNSS
subject: Gravity variation
subject: Mt. Wank
subject: Mt. Zugspitze
subject: Superconducting gravimeter
subject: Lime
subject: Absolute gravity
subject: Bavarians
subject: Northern Limestone Alps
subject: Standard uncertainty
subject: Summit heights
subject: Time span
subject: Vertical stability
subject: Landforms
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In 2004, first absolute gravity (AG) measurements were performed on the top of Mt. Zugspitze (2 sites) and at the foot (1 site) and top (1 site) of Mt. Wank. Mt. Wank (summit height 1780 m) and Mt. Zugspitze (2960 m) are about 15 km apart from each other and belong geologically to different parts of the Northern Limestone Alps. Bridging a time span of 15 years, the deduced gravity variations for Zugspitze are in the order of ‐0.30 μm/s² with a standard uncertainty of 0.04 μm/s². The Wank stations (foot and top) show no significant gravity variation. The vertical stability of Wank summit is also confirmed by results of continuous GNSS recordings. Because an Alpine mountain uplift of 1 or 2 mm/yr cannot explain the obtained gravity decline at Zugspitze, the dominating geophysical contributions are assumed to be due to the diminishing glaciers in the vicinity. The modelled gravity trend caused by glacier retreat between epochs 1999 and 2018 amounts to ‐0.012 μm/s²/yr at both Zugspitze AG sites. This explains more than half of the observed gravity decrease. Long‐term variations on inter‐annual and climate‐relevant decadal scale will be investigated in the future using as supplement superconducting gravimetry (installed in 2019) and GNSS equipment (since 2018). © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Journal and Data Archive Collaboration Forum [online event]
Creators: name: Alvanides, Serafeim
name: Kleiner, Brian
name: Doorn, Peter
name: Fisher, Ruth
name: Glavica, Marijana
name: Lister, Allyson
name: Bosma, Ulbe
name: Peer, Limor
name: Štebe, Janez
Publisher: name: Zenodo
Year: 2022
Subjects: Data journal
Curration
Reproducibility
Data repository
CESSDA
FAIRsharing
Open research

description: The availability of research data underlying articles published in journals is becoming a common practice in scientific communication. The European Commission and other funders of scientific research have set high expectations for scientists towards openness and availability of scientific work and results. Scientific publishers, through journals and scholarly publications are the main point of realising open science in practice.

 This event was part of the continuous Journals Outreach initiative (https://www.cessda.eu/Training/Journals-outreach), bringing together CESSDA service providers (SPs) with Social Science & Humanities Journals. Its target audiences were publishers, editors, researchers, and CESSDA Service providers. The event was also an opportunity for publishers/journals to highlight new initiatives in research data services linked to scientific publications.

 Programme 14:00-14:20 Activities of the CESSDA Journals Outreach group; Profiles of CESSDA Service Providers related to accepting data linked to journals / Serafeim Alvanides Moderator: Brian Kleiner

 14:20-14:40 Data showcases: the data journal in a multimodal world / Peter Doorn, Leen Breure 14:40-15:00 An Introduction to Open Research Europe, focusing on Humanities and Social Sciences (HSS) / Ruth Fisher 15:00-15:10 Break Moderator: Marijana Glavica 15:10-15:30 FAIRsharing: An ecosystem of research standards and databases for enabling FAIR data / Allyson Lister 15:30-15:50 The Research Data Journal: objectives and processes / Ulbe Bosma 15:50-16:10 The CURE (Curation for Reproducibility) Consortium / Limor Peer Moderator: Janez Štebe 16:10-16:30 General discussion
title: В.И.Ковалевский в промышленной жизни России начала XX века
Creators: name: Барышников, Михаил
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Владимир Иванович Ковалевский стал одной из ключевых фигур в развитии транспортного машиностроительного бизнеса (вагоностроение) в России в начале двадцатого века. Он вошел в число тех «новых промышленников» ― по происхождению российских и иностранных предпринимателей ― кто активно содействовал укреплению индустриального потенциала Российской империи накануне и в годы Первой мировой войны. В представленной статье рассматриваются первые годы его деловой карьеры, прежде чем он стал известен в отечественном промышленном мире своей деятельностью по расширению бизнеса путем объединения нескольких предприятий. В более подробном исследовании Товарищества Петербургского вагоностроительного завода ― одной из крупнейших промышленных компаний России ― рассмотрено, как Ковалевский адаптировался к требованиям крупного производства и справился с внешними вызовами, вызванными военным временем.
Lower- versus higher-order nonclassicalities for a coherent superposed quantum state
Creators: name: Deepak
name: Chatterjee, Arpita
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81V80

description: A coherent state is defined conventionally in different ways such as a displaced vacuum state, an eigenket of annihilation operator or as an infinite dimensional Poissonian superposition of Fock states. In this work, we describe a superposition $(ta+ra^\dagger)$ of field annihilation and creation operators acting on a continuous variable coherent state $|α\rangle$ and specify it by $|ψ\rangle$. We analyze the lower- as well as the higher-order nonclassical properties of $|ψ\rangle$. The comparison is performed by using a set of nonclassicality witnesses (e.g., higher-order photon-statistics, higher-order antibunching, higher-order sub-Poissonian statistics, higher-order squeezing, Agarwal-Tara parameter, Klyshko's condition and a relatively new concept, matrix of phase-space distribution). It is found that higher-order criteria are much more efficient to detect the presence of nonclassicality as compared to lower-order conditions.
description: 10 pages, 10 figures
title: De Wal, De Moedergodinnen.
Creators: name: Lersch, Laurenz
Publisher: name: University Library Heidelberg
Year: 2015

description: De Wal, De Moedergodinnen. Eene oudheidkundig-mythologische Verhandeling. Te Leyden. Hazenberg 1846. CI und 174 S. in 8. (mit zwei Lithographieen.)
title: СОВЕРШЕНСТВОВАНИЕ ПРОЦЕССА АДАПТАЦИИ ПЕРСОНАЛА ОРГАНИЗАЦИИ
Creators: name: Громова, Татьяна
name: Захарова, Евгения
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Представлено исследование системы адаптации персонала финансово-кредитной организации. Изложены важность управления системой адаптации организации, определены недостатки существующей системы адаптации, а также предложены мероприятия по их устранению для снижения текучести персонала и повышения эффективности деятельности организации.
Energy-Saving performance of flap-Adjustment-based centrifugal fan
Creators: name: Chen, Genglin
name: Xu, Wei
name: Zhao, Jinyun
name: Zhang, Haipeng
Publisher: name: Basel : MDPI AG
Year: 2018
Subjects: subject: Centrifugal fan
subject: Economic performance
subject: Efficiency
subject: Energy-saving rate
subject: Flap-Adjustment
subject: Energy efficiency
subject: Fans
subject: Finite element method
subject: Adjustment efficiency
subject: Aero-dynamic performance
subject: Centrifugal fans
subject: Comparative analysis
subject: Economic characteristics
subject: Energy-saving rates
subject: Off design condition
subject: Energy conservation
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: The current paper mainly focuses on finding a more appropriate way to enhance the fan performance at off-design conditions. The centrifugal fan (CF) based on flap-Adjustment (FA) has been investigated through theoretical, experimental, and finite element methods. To obtain a more predominant performance of CF from the different adjustments, we carried out a comparative analysis on FA and leading-Adjustment (LA) in aerodynamic performances, which included the adjusted angle of blades, total pressure, efficiency, system-efficiency, adjustment-efficiency, and energy-saving rate. The contribution of this paper is the integrated performance curve of the CF. Finally, the results showed that the effects of FA and LA on economic performance and energy savings of the fan varied with the blade angles. Furthermore, FA was feasible, which is more sensitive than LA. Moreover, the CF with FA offered a more extended flow-range of high economic characteristic in comparison with LA. Finally, when the operation flow-range extends, energy-saving rate of the fan with FA would have improvement. © 2018 by the authors.
title: ФОРМИРОВАНИЕ СПРОСА КАК ФАКТОР ИННОВАЦИОННОГО РАЗВИТИЯ УЗБЕКИСТАНА
Creators: name: Икрамов, Мурат
name: Алимов, Гайрат
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Освещаются основные процессы формирования инновационной экономики, проведен анализ динамики основных показателей инновационной деятельности предприятий и организаций в Узбекистане.
Reliability analysis of fatigue damage extrapolations of wind turbines using offshore strain measurements
Creators: name: Hübler, Clemens
name: Weijtjens, Wout
name: Rolfes, Raimund
name: Devriendt, Christof
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2018
Subjects: subject: Extrapolation
subject: Fatigue damage
subject: Reliability analysis
subject: Strain measurement
subject: Torque
subject: Wind
subject: Damage calculations
subject: Design documents
subject: Environmental conditions
subject: Lifetime estimation
subject: Lifetime extension
subject: Measurement-based
subject: Occurrence probability
subject: Uncertain process
subject: Offshore wind turbines
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
subject: Dewey Decimal Classification::600 | Technik

description: While substructures of offshore wind turbines become older and begin to reach their design lifetimes, the relevance of measurement based lifetime extension increases. To make well-founded decisions on possible lifetime extensions, damage extrapolations based on measurements are needed. However, although for all substructures, fatigue damage calculations were conducted during the design process, there is no consensus on how to extrapolate 10-minute damages to lifetime damages. Furthermore, extrapolating damages is an uncertain process and its actual reliability is unknown. Therefore, the current work uses data of offshore strain measurements to assess different approaches of extrapolating damages, and to investigate the reliability of damage extrapolations. For the present data, the most reliable lifetime estimations are possible, if the damage data is split up into wind speed bins. For each wind speed bin, the occurrence probability should be based on data rather than on design documents. Moreover, using mean damages in each bin is the best practice. Furthermore, our results suggest that strain measurements of about 9 to 10 months lead to a relatively representative and unbiased data set. Therefore, if there are no significant changes of the turbine or the environmental conditions over the lifetime, damage extrapolations based on such a time period are sufficiently accurate.
Mechanisms of Planetary and Stellar Dynamos
Creators: name: Dormy, Emmanuel
name: Petitdemange, Ludovic
name: Schrinner, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We review some of the recent progress on modeling planetary and stellar dynamos. Particular attention is given to the dynamo mechanisms and the resulting properties of the field. We present direct numerical simulations using a simple Boussinesq model. These simulations are interpreted using the classical mean-field formalism. We investigate the transition from steady dipolar to multipolar dynamo waves solutions varying different control parameters, and discuss the relevance to stellar magnetic fields. We show that owing to the role of the strong zonal flow, this transition is hysteretic. In the presence of stress-free boundary conditions, the bistability extends over a wide range of parameters.
description: Proceedings of IAUS 294 "Solar and Astrophysical Dynamos and Magnetic Activity" Editors A.G. Kosovichev, E.M. de Gouveia Dal Pino, & Y.Yan, Cambridge University Press, to appear (2013)
Wo war die Küste? : Rekonstruktion von kreidezeitlichen Meeresspiegel-Schwankungen
Creators: name: Heimhofer, Ulrich
name: Bornemann, André
name: Erbacher, Jochen
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2022
Subjects: subject: Forschungseinrichtung
subject: Klimaänderung
subject: Erdoberfläche
subject: Geologie
subject: Ressourcen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Wo sich während der verschiedenen Erdzeitalter die Küste befand, beeinflusst bis heute die Beschaffenheit des geologischen Untergrundes. Mit Hilfe von geochemischen Analysen an Bohrkernen untersuchen Wissenschaftler des Instituts für Geologie in Zusammenarbeit mit Wissenschaftlern der Bundesanstalt für Geowissenschaften und Rohstoffe die Zusammensetzung der Sedimentgesteine im Untergrund, um damit der Küstenlinie auf die Spur zu kommen. Für die Energiegewinnung oder Endlagerung von hochradioaktiven Abfällen kann dies von großer Bedeutung sein.
Robust flight planning impact assessment considering convective phenomena
Creators: name: García-Heras, Javier
name: Soler, Manuel
name: González-Arribas, Daniel
name: Eschbacher, Kurt
name: Rokitansky, Carl-Herbert
name: Sacher, Daniel
name: Gelhardt, Ulrike
name: Lang, Jürgen
name: Hauf, Thomas
name: Simarro, Juan
name: Valenzuela, Alfonso
name: Franco, Antonio
name: Rivas, Damián
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2021
Subjects: subject: Convective weather
subject: Robust flight-planning
subject: Simulation
subject: Planning
subject: Thunderstorms
subject: Vehicle actuated signals
subject: Air Traffic Management
subject: Air traffic simulators
subject: Ensemble prediction systems
subject: Impact assessments
subject: Objective functions
subject: Open loop optimal control
subject: Path-finding algorithms
subject: Simulation process
subject: Air traffic control
subject: air traffic
subject: algorithm
subject: assessment method
subject: computer simulation
subject: numerical model
subject: traffic management
subject: transportation planning
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::380 | Handel, Kommunikation, Verkehr

description: Thunderstorms are one of the leading causes of Air Traffic Management delays. In this paper, we assess how incorporating convective information into flight planning algorithms can lead to reductions in reroutings due to storm encounters during the execution of the flight. We use robust open-loop optimal control methodology at the flight planning level and incorporate meteorological uncertainties based on Ensemble Prediction System forecasts. Convective risk areas can be derived from the latter to be included in the objective function. At the execution level, the planned trajectories are included in an air traffic simulator (NAVSIM) under observed weather (wind and storms). In this simulation process, track modifications might be triggered in case of encountering an observed thunderstorm. A tool termed DIVMET based on pathfinding algorithms has been integrated into NAVSIM is considered to that end. Results show that planning robust trajectories (avoiding thus convective areas) reduces the number of storms encounters and increases predictability. This increase in predictability is at a cost in terms of fuel and time, also quantified. © 2021 Elsevier Ltd
Iconografia e iconologia: un'introduzione
Creators: name: Vargiu, Luca
Publisher: name: Zenodo
Year: 2023
Subjects: iconology
Iconography
Erwin Panofsky
Aby Warburg
Godefridus J. Hoogewerff
Cesare Ripa

description: Laboratorio di iconografia e iconologia. Università degli Studi di Cagliari, Dipartimento di Lettere, Lingue e Beni Culturali. Cagliari, 14 giugno 2023.
Precision measurement of the metastable 3P2 lifetime of neon
Creators: name: Zinner, Martin
name: Spoden, Peter
name: Kraemer, Tobias
name: Birkl, Gerhard
name: Ertmer, Wolfgang
Publisher: name: American Physical Society
Year: 2003
Subjects: subject: magneto-optical trap
subject: MOT
subject: neon
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The lifetime of the metastable 3P2 state of neon has been determined as 14.73(14)s [decay rate 0.06790(64)s−1] by measuring the decay in fluorescence of an ensemble of 20Ne atoms trapped in a magneto-optical trap (MOT). Due to low background gas pressure (p<5×10−11mbar) and low relative excitation to the 3D3 state (0.5 % excitation probability) only small corrections have to be included in the lifetime extrapolation. Together with a careful analysis of residual loss mechanisms in the MOT a lifetime determination to high precision is achieved.
title: ВОЗМОЖНОСТИ ПРИМЕНЕНИЯ СОЦИОНИКИ ПРИ ФОРМИРОВАНИИ РАБОТОСПОСОБНОЙ КОМАНДЫ
Creators: name: Калинина, Татьяна
name: Шорохова, Надежда
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Рассмотрены история развития соционики и базовые понятия, которыми она оперирует. Особое внимание уделяется прикладному значению соционики в сфере управления персоналом. Применение теоретических основ соционики способствует решению вопросов, которые встают перед руководителем на стадии формирования команды и повышения эффективности работы персонала.
Lemna gibba L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. gibba L. Cat. 333. Fehlt wahrscheinlich dem Wallis. Die alten Angaben Vouvry und Illarsaz sind sehr zweifelhaft; die Pflanzevon Outre-Rhönegehörtnach GAMSzu L. minor. (Eine neuere Angabe: Törbel [Hegi, Flora, 2.Aufl., Bd.II, S. 177 (1939)], beruht offenbarauf einemVersehen.) Lemna trisulca L.und Spirodela polyrrhiza (L.) Schleiden(Lemna polyrrhiza L.) (vgl. Cat.XLVIII und 333) sind für das Wallis 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
Planar massless fermions in Coulomb and Aharonov-Bohm potentials
Creators: name: Khalilov, V. R.
name: Lee, K. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Solutions to the Dirac equation are constructed for a massless charged fermion in Coulomb and Aharonov--Bohm potentials in 2+1 dimensions. The Dirac Hamiltonian on this background is singular and needs a one-parameter self-adjoint extension, which can be given in terms of self-adjoint boundary conditions. We show that the virtual (quasistationary) bound states emerge in the presence of an attractive Coulomb potential when the so-called effective charges become overcritical and discuss a restructuring of the vacuum of the quantum electrodynamics when the virtual bound states emerge. We derive equations, which determine the energies and lifetimes of virtual bound states, find solutions of obtained equations for some values of parameters as well as analyze the local density of states as a function of energy in the presence of Coulomb and Aharonov--Bohm potentials.
description: 14 pages, 5 figures
Hyperbolic Geometric Graph Representation Learning for Hierarchy-imbalance Node Classification
Creators: name: Fu, Xingcheng
name: Wei, Yuecen
name: Sun, Qingyun
name: Yuan, Haonan
name: Wu, Jia
name: Peng, Hao
name: Li, Jianxin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Learning unbiased node representations for imbalanced samples in the graph has become a more remarkable and important topic. For the graph, a significant challenge is that the topological properties of the nodes (e.g., locations, roles) are unbalanced (topology-imbalance), other than the number of training labeled nodes (quantity-imbalance). Existing studies on topology-imbalance focus on the location or the local neighborhood structure of nodes, ignoring the global underlying hierarchical properties of the graph, i.e., hierarchy. In the real-world scenario, the hierarchical structure of graph data reveals important topological properties of graphs and is relevant to a wide range of applications. We find that training labeled nodes with different hierarchical properties have a significant impact on the node classification tasks and confirm it in our experiments. It is well known that hyperbolic geometry has a unique advantage in representing the hierarchical structure of graphs. Therefore, we attempt to explore the hierarchy-imbalance issue for node classification of graph neural networks with a novelty perspective of hyperbolic geometry, including its characteristics and causes. Then, we propose a novel hyperbolic geometric hierarchy-imbalance learning framework, named HyperIMBA, to alleviate the hierarchy-imbalance issue caused by uneven hierarchy-levels and cross-hierarchy connectivity patterns of labeled nodes.Extensive experimental results demonstrate the superior effectiveness of HyperIMBA for hierarchy-imbalance node classification tasks.
description: Accepted by Web Conference (WWW) 2023
title: ФАКТОРЫ, ВЛИЯЮЩИЕ НА ИНВЕСТИЦИОННЫЙ КЛИМАТ РЕГИОНА (НА ПРИМЕРЕ НОВГОРОДСКОЙ ОБЛАСТИ)
Creators: name: Канищева, Наталья
name: Гавриленко, Кирилл
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Рассмотрены факторы инвестиционной привлекательности региона на примере Новгородской области. Цель данной работы – определение основных драйверов роста инвестиционной привлекательности региона. В ходе работы были изучены исходные параметры региона, а также рассмотрены и проанализированы меры местных властей, направленные на улучшение инвестиционного климата Новгородской области.
Dynamics of Dark Solitons in Elongated Bose-Einstein Condensates
Creators: name: Muryshev, A.
name: Shlyapnikov, G.V.
name: Ertmer, Wolfgang
name: Sengstock, K.
name: Lewenstein, M.
Publisher: name: American Physical Society
Year: 2002
Subjects: subject: Differential equations
subject: Electron gas
subject: Electron traps
subject: Harmonic generation
subject: Molecular dynamics
subject: Probability density function
subject: Spectrum analysis
subject: Temperature
subject: Thermodynamic stability
subject: Bose-Einstein condensates
subject: Dark solitons
subject: Dynamical stability
subject: Thermodynamic instability
subject: Solitons
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We find two types of moving dark soliton textures in elongated condensates: nonstationary kinks and proper dark solitons. The latter have a flat notch region and we obtain the diagram of their dynamical stability. At finite temperatures the dynamically stable solitons decay due to the thermodynamic instability. We develop a theory of their dissipative dynamics and explain experimental data. © 2002 The American Physical Society.
Dense optical and near-infrared monitoring of CTA 102 during high state in 2012 with OISTER: Detection of intra-night "orphan polarized flux flare"
Creators: name: Itoh, Ryosuke
name: Fukazawa, Yasushi
name: Tanaka, Yasuyuki T.
name: Abe, Yuhei
name: Akitaya, Hiroshi
name: Arai, Akira
name: Hayashi, Masahiko
name: Hori, Takafumi
name: Isogai, Mizuki
name: Izumiura, Hideyuki
name: Kawabata, Koji S.
name: Kawai, Nobuyuki
name: Kuroda, Daisuke
name: Miyanoshita, Ryo
name: Moritani, Yuki
name: Morokuma, Tomoki
name: Nagayama, Takahiro
name: Nakamoto, Jumpei
name: Nakata, Chikako
name: Oasa, Yumiko
name: Ohshima, Tomohito
name: Ohsugi, Takashi
name: Okumura, Shin-ichiro
name: Saito, Yoshihiko
name: Saito, Yu
name: Sasada, Mahito
name: Sekiguchi, Kazuhiro
name: Takagi, Yuhei
name: Takahashi, Jun
name: Takahashi, Yukihiro
name: Takaki, Katsutoshi
name: Uemura, Makoto
name: Ueno, Issei
name: Urakawa, Seitaro
name: Watanabe, Makoto
name: Yamanaka, Masayuki
name: Yonekura, Yoshinori
name: Yoshida, Michitoshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: CTA 102, classified as a flat spectrum radio quasar at z=1.037, produced exceptionally bright optical flare in 2012 September. Following Fermi-LAT detection of enhanced gamma-ray activity, we densely monitored this source in the optical and near-infrared bands for the subsequent ten nights using twelve telescopes in Japan and South-Africa. On MJD 56197 (2012 September 27, 4-5 days after the peak of bright gamma-ray flare), polarized flux showed a transient increase, while total flux and polarization angle remained almost constant during the "orphan polarized-flux flare". We also detected an intra-night and prominent flare on MJD 56202. The total and polarized fluxes showed quite similar temporal variations, but PA again remained constant during the flare. Interestingly, the polarization angles during the two flares were significantly different from the jet direction. Emergence of a new emission component with high polarization degree (PD) up to 40% would be responsible for the observed two flares, and such a high PD indicates a presence of highly ordered magnetic field at the emission site. We discuss that the well-ordered magnetic field and even the observed directions of polarization angle which is grossly perpendicular to the jet are reasonably accounted for by transverse shock(s) propagating down the jet.
description: 20 pages, 3 figures, Accepted for publication in the Astrophysical Journal Letters
title:  ФОРМИРОВАНИЕ ИНФОРМАЦИОННОЙ БАЗЫ ДЛЯ ПРИНЯТИЯ УПРАВЛЕНЧЕСКИХ РЕШЕНИЙ ПРЕДПРИЯТИЯ В УСЛОВИЯХ НЕОПРЕДЕЛЕННОСТИ
Creators: name: Кукушина, Ольга
name: Кузьмина, Надежда
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: В современных условиях экономической неопределённости эффективное управление предприятием или регионом, как сложными динамическими кибернетическими системами, невозможно без формирования и использования объективной, структурированной, обоснованной информационной базы. Низкий уровень качества информации, её недостаточность и искажённость являются наиболее вероятной причиной принятия малодейственных и неэффективных управленческих решений.
Исследуются этапы и систематика формирования информационной базы для управления предприятием в условиях экономической неопределённости.
Decay of spin coherences in one-dimensional spin systems
Creators: name: Kaur, Gurneet
name: Ajoy, Ashok
name: Cappellaro, Paola
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Strategies to protect multi-qubit states against decoherence are difficult to formulate because of their complex many-body dynamics. A better knowledge of the decay dynamics would help in the construction of decoupling control schemes. Here we use solid-state nuclear magnetic resonance techniques to experimentally investigate the decay of coherent multi-spin states in linear spin chains. Leveraging on the quasi-one-dimensional geometry of Fluorapatite crystal spin systems, we can gain a deeper insight on the multi-spin states created by the coherent evolution, and their subsequent decay, than it is possible in 3D systems. We are then able to formulate an analytical model that captures the key features of the decay. We can thus compare the decoherence behavior for different initial states of the spin chain and link their decay rate to the state characteristics, in particular their coherence and long-range correlation among spins. Our experimental and theoretical study shows that the spin chains undergo a rich dynamics, with a slower decay rate than for the 3D case, and thus might be more amenable to decoupling techniques.
A beaconing approach whith key exchange in vehicular ad hoc networks
Creators: name: Erritali, Mohammed
name: Reda, Oussama Mohamed
name: Ouahidi, Bouabid El
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Vehicular Ad-Hoc Networks (VANETs) are special forms of Mobile Ad-Hoc Networks (MANETs) that allows vehicles to communicate together in the absence of fixed infrastructure.In this type of network beaconing is the means used to discover the nodes in its eighborhood.For routing protocol successful delivery of beacons containing speed, direction and position of a car is extremely important.Otherwise, routing information should not be modified/manipulated during transmission without detection, in order to ensure the routing information, messages must be signed and provided with a certificate to attest valid network participants. In this work we present a beaconing protocol with key exchange to prepare the generation of a signature to protect the routing information protocol 'Greedy Perimeter Stateless Routing'.