cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Longitudinal conductivity of LaF3/SrF2 multilayer heterostructures
Creators: name: Vergentev, Tikkhon
name: Banshchikov, Alexander
name: Filimonov, Alexey
name: Koroleva, Ekaterina
name: Sokolov, Nikolay
name: Wurz, Marc Christopher
Publisher: name: Abingdon : Taylor and Francis Ltd.
Year: 2016
Subjects: subject: Heterostructures
subject: Impedance spectroscopy
subject: Interfacial spacing
subject: Ionic conductivity
subject: Lanthanum fluoride
subject: Longitudinal conductivity
subject: Molecular beam epitaxy
subject: Strontium fluoride
subject: Activation energy
subject: Epitaxial growth
subject: Fluorine
subject: Fluorine compounds
subject: Interfaces (materials)
subject: Lattice mismatch
subject: Molecular beams
subject: Multilayers
subject: Spectroscopy
subject: Impedance diagrams
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: LaF3/SrF2 multilayer heterostructures with thicknesses of individual layers in the range 5-100 nm have been grown on MgO(100) substrates using molecular beam epitaxy. The longitudinal conductivity of the films has been measured using impedance spectroscopy in the frequency range 10-1-106 Hz and a temperature range 300-570 K. The ionic DC conductivities have been determined from Nyquist impedance diagrams and activation energies from the Arrhenius- Frenkel equation. An increase of the DC conductivity has been observed to accompany decreased layer thickness for various thicknesses as small as 25 nm. The greatest conductivity has been shown for a multilayer heterostructure having thicknesses of 25 nm per layer. The structure has a conductivity two orders of magnitude greater than pure LaF3 bulk material. The increasing conductivity can be understood as a redistribution of charge carriers through the interface due to differing chemical potentials of the materials, by strong lattice-constant mismatch, and/or by formation of a solid La1-xSrxF3-x solution at the interface during the growth process. © 2016 The Author(s).
Artificial Ant Species on Solving Optimization Problems
Creators: name: Pintea, Camelia-M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences
subject: 90C27, 68T05, 92D50

description: During the last years several ant-based techniques were involved to solve hard and complex optimization problems. The current paper is a short study about the influence of artificial ant species in solving optimization problems. There are studied the artificial Pharaoh Ants, Lasius Niger and also artificial ants with no special specificity used commonly in Ant Colony Optimization.
description: 4 pages, accepted paper
title: ФИЗИОЛОГИЧЕСКАЯ ОЦЕНКА ГЕМАТОЛОГИЧЕСКИХ ПОКАЗАТЕЛЕЙ КУР РОДИТЕЛЬСКОГО СТАДА ПОСЛЕ ПРИМЕНЕНИЯ ВИТАМИННОЙ КОРМОВОЙ ДОБАВКИ «ВИГОТОН». СБОРНИК НАУЧНЫХ ТРУДОВ КНЦЗВ. - 2019. - Т. 8. - № 1
Creators: name: Анжелика , Юрина
name: Мерзленко , Руслан
Publisher: name: ФГБНУ КНЦЗВ
Year: 2019

description: рассматриваются вопросы изучения морфологического состава крови кур-несушек родительского стада бройлеров под влиянием витаминной кормовой добавки «Виготон». Установлено, что выпаивание препарата птице в дозе 1,5 мл на 1 л питьевой воды активизирует гемопоэз и повышает ре-активность их организма.
description: the paper discusses the study of the morphological composition of blood of laying hens of parental herd of broilers influenced by vitamin feed additives «Vigoton». It was found that the drug drinking to poultry at a dose of 1.5 ml per 1 liter of drinking water activates hematopoiesis and increases the reactivity of their body.
title: СТЕПЕНЬ РЕАЛИЗАЦИИ ГЕНЕТИЧЕСКОГО  ПОТЕНЦИАЛА БЫКОВ-ПРОИЗВОДИТЕЛЕЙ  РУП «БРЕСТСКОЕ ПЛЕМПРЕДПРИЯТИЕ». СБОРНИК НАУЧНЫХ ТРУДОВ КНЦЗВ. - 2019. - Т. 8. - № 2
Creators: name: Андрейчик , Ангелина
name: Танана , Людмила
Publisher: name: ФГБНУ КНЦЗВ
Year: 2019

description: установлено, что используемые в хозяйстве быки-производители имеют высокую племенную ценность, но низкую степень реализации генетического потенциала. Молочная продуктивность дойного стада должна находиться на уровне 5500-6000 кг молока от коровы в год и выше. Однако фактическая продуктивность составляет 4967 кг молока на корову.
description: it has been found that the bulls used on the farm have a high breeding value, but a low degree of realization of genetic potential. The milk production of dairy herds should be at the level of 5500-6000 kg of milk from a cow per year and more. However, the actual productivity is 4967 kg of milk per cow.
Positive feedback produces broad distributions in maximum activation attained within a narrow time window in stochastic biochemical reactions
Creators: name: Das, Jayajit
Publisher: name: arXiv
Year: 2012
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: How do single cell fate decisions induced by activation of key signaling proteins above threshold concentrations within a time interval are affected by stochastic fluctuations in biochemical reactions? We address this question using minimal models of stochastic chemical reactions commonly found in cell signaling and gene regulatory systems. Employing exact solutions and semi-analytical methods we calculate distributions of the maximum value ($N$) of activated species concentrations ($P_{max}(N)$) and the time ($t$) taken to reach the maximum value ($P_{max}(t)$) within a time window in the minimal models. We find, the presence of positive feedback interactions make $P_{max}(N)$ more spread out with a higher "peakedness" in $P_{max}(t)$. Thus positive feedback interactions may help single cells to respond sensitively to a stimulus when cell decision processes require upregulation of activated forms of key proteins to a threshold number within a time window.
description: accepted for publication in Journal of Chemical Physics. Details of the calculations are provided in the supplementary document
Freeze-drying of mammalian cells using trehalose: Preservation of DNA integrity
Creators: name: Zhang, Miao
name: Oldenhof, Harriette
name: Sydykov, Bulat
name: Bigalk, Judith
name: Sieme, Harald
name: Wolkers, Willem F.
Publisher: name: London : Nature Publishing Group
Year: 2017
Subjects: subject: DNA
subject: albumin
subject: trehalose
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: The aim of this study was to investigate preservation of biomolecular structures, particularly DNA, in freeze-dried fibroblasts, after loading with trehalose via freezing-induced uptake. Cells were freeze-dried with trehalose alone or in a mixture of albumin and trehalose. Albumin was added to increase the glass transition temperature and storage stability. No viable cells were recovered after freeze-drying and rehydration. FTIR studies showed that membrane phase behavior of freeze-dried cells resembles that of fresh cells. However, one day after rehydration membrane phase separation was observed, irrespective of the presence or absence of trehalose during freeze-drying. Freeze-drying did not affect the overall protein secondary structure. Analysis of DNA damage via single cell gel electrophoresis ('comet assay') showed that DNA damage progressively increased with storage duration and temperature. DNA damage was prevented during storage at 4 °C. It is shown that trehalose reduces DNA damage during storage, whereas addition of albumin did not seem to have an additional protective effect on storage stability (i.e. DNA integrity) despite the fact that albumin increased the glass transition temperature. Taken together, DNA in freeze-dried somatic cells can be preserved using trehalose as protectant and storage at or below 4 °C.
title: ИЗУЧЕНИЕ УРОВНЯ СРЕДНЕМОЛЕКУЛЯРНЫХ  ПЕПТИДОВ В СЫВОРОТКЕ КРОВИ  ЛАБОРАТОРНЫХ КРЫС ПРИ ФАРМАКОТЕРАПИИ ОСТРОГО ТОКСИЧЕСКОГО ГЕПАТИТА. СБОРНИК НАУЧНЫХ ТРУДОВ КНЦЗВ. - 2019. - Т. 8. - № 2
Creators: name: Абрамов , Андрей
name: Семененко , Марина
name: Кузьминова , Елена
name: Гринь , Владимир
Publisher: name: ФГБНУ КНЦЗВ
Year: 2019

description: в статье изложены исследования уровня среднемолекулярных петидов (СМП) в крови лабораторных животных при моделировании острого токсического гепатита тетрахлорметаном (CCl4) с параллельной фармакотерапией новым инъекционным ветеринарным гепатопротектором.
description: the article presents studies of the level of medium molecular peptides (MMP) in the blood of laboratory animals in the simulation of acute toxic hepatitis with carbon tetrachloride (CCl4) with parallel pharmacotherapy by a new injection veterinary hepatoprotector
Laser-Induced Magnetic Nanostructures with Tunable Topological Properties
Creators: name: Finazzi, M.
name: Savoini, M.
name: Khorsand, A. R.
name: Tsukamoto, A.
name: Itoh, A.
name: Duò, L.
name: Kirilyuk, A.
name: Rasing, Th.
name: Ezawa, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the creation and real-space observation of magnetic structures with well-defined topological properties and a lateral size as low as about 150 nm. They are generated in a thin ferrimagnetic film by ultrashort single optical laser pulses. Thanks to their topological properties, such structures can be classified as Skyrmions of a particular type that does not require an externally applied magnetic field for stabilization. Besides Skyrmions, we are able to generate magnetic features with topological characteristics that can be tuned by changing the laser fluence. The stability of such features is accounted for by an analytical model based on the interplay between the exchange and the magnetic dipole-dipole interactions
description: 8 pages, 3 figures
Ökologie der Kerbameise Coptoformica forsslundi Lohmander, 1949 (Hymenoptera: Formicidae, genus Formica, subgenus Coptoformica) an ihrem norddeutschen Vorkommen
Creators: name: Sörensen, Uwe
Publisher: name: Hannover : Universität Hannover
Year: 2004
Subjects: subject: Coptoformica forsslundi
subject: ecology
subject: Northern Germany
subject: Ökologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::590 | Tiere (Zoologie)

description: [no abstract]
Phase-stable source of polarization-entangled photons in a linear double-pass configuration
Creators: name: Steinlechner, Fabian
name: Ramelow, Sven
name: Jofre, Marc
name: Gilaberte, Marta
name: Jennewein, Thomas
name: Torres, Juan. P.
name: Mitchell, Morgan W.
name: Pruneri, Valerio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel 'folded sandwich' configuration. Bi-directionally pumping a single periodically poled KTiOPO$_4$ (ppKTP) crystal with a 405-nm laser diode, we generate entangled photon pairs at the non-degenerate wavelengths 784 nm (signal) and 839 nm (idler), and achieve an unprecedented detection rate of 11.8 kcps for 10.4 $μ$W of pump power (1.1 million pairs / mW), in a 2.9-nm bandwidth, while maintaining a very high two-photon entanglement quality, with a Bell-state fidelity of $99.3\pm0.3$%.
Theory of high-energy correlated multiphoton x-ray diffraction for synchrotron-radiation sources
Creators: name: Debnath, Arunangshu
name: Santra, Robin
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: subject: 530

description: We present a theoretical formulation for the multiphoton diffraction phenomenology in the nonrelativistic limit, suitable for interpreting high-energy x-ray diffraction measurements using synchrotron radiation sources. A hierarchy of approximations and the systematic analysis of limiting cases are presented. A convolutional representation of the diffraction signal allows classification of the physical resources contributing to the correlation signatures. The formulation is intended for developing a theoretical description capable of describing the plausible absence or presence of correlation signatures in elastic and inelastic diffractive scattering. Interpreting these correlation signatures in terms of the incoming field modulated many-body electronic density correlations provides a unique perspective for structural imaging studies. More essentially, it offers a framework necessary for theoretical developments of associated reconstruction algorithms.
Extended Bose-Hubbard model with pair hopping on the triangular lattice
Creators: name: Wang, Yancheng
name: Zhang, Wanzhou
name: Shao, Hui
name: Guo, Wenan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study systematically an extended Bose-Hubbard model on the triangular lattice by means of a meanfield method based on the Gutzwiller ansatz. Pair hopping terms are explicitly included and a three-body constraint is applied. The ground-state phase diagram and a variety of quantum phase transitions are investigated in great detail. In particular, we show the existence and stability of the pair supersolid phase.
Untersuchung zur Entwicklungsgeschichte sakraler Westbaulösungen des kernsächsischen Siedlungsraumes in romanischer Zeit : dargestellt vornehmlich an den Beispielen der Klosterkirche Marienmünster und der Pfarrkirche St. Kilian zu Höxter
Creators: name: Seidel, Heiko
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2004
Subjects: subject: Two-tower facade
subject: westwork
subject: romanesque architecture
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::720 | Architektur
subject: Dewey Decimal Classification::200 | Religion, Religionsphilosophie::230 | Theologie, Christentum

description: [no abstract]
Loss Distribution Approach for Operational Risk Capital Modelling under Basel II: Combining Different Data Sources for Risk Estimation
Creators: name: Shevchenko, Pavel V.
name: Peters, Gareth W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Risk Management (q-fin.RM)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: The management of operational risk in the banking industry has undergone significant changes over the last decade due to substantial changes in operational risk environment. Globalization, deregulation, the use of complex financial products and changes in information technology have resulted in exposure to new risks very different from market and credit risks. In response, Basel Committee for banking Supervision has developed a regulatory framework, referred to as Basel II, that introduced operational risk category and corresponding capital requirements. Over the past five years, major banks in most parts of the world have received accreditation under the Basel II Advanced Measurement Approach (AMA) by adopting the loss distribution approach (LDA) despite there being a number of unresolved methodological challenges in its implementation. Different approaches and methods are still under hot debate. In this paper, we review methods proposed in the literature for combining different data sources (internal data, external data and scenario analysis) which is one of the regulatory requirement for AMA.
High-fidelity CZ gate for resonator-based superconducting quantum computers
Creators: name: Ghosh, Joydip
name: Galiautdinov, Andrei
name: Zhou, Zhongyuan
name: Korotkov, Alexander N.
name: Martinis, John M.
name: Geller, Michael R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A possible building block for a scalable quantum computer has recently been demonstrated [M. Mariantoni et al., Science 334, 61 (2011)]. This architecture consists of superconducting qubits capacitively coupled both to individual memory resonators as well as a common bus. In this work we study a natural primitive entangling gate for this and related resonator-based architectures, which consists of a CZ operation between a qubit and the bus. The CZ gate is implemented with the aid of the non-computational qubit |2> state [F. W. Strauch et al., Phys. Rev. Lett. 91, 167005 (2003)]. Assuming phase or transmon qubits with 300 MHz anharmonicity, we show that by using only low frequency qubit-bias control it is possible to implement the qubit-bus CZ gate with 99.9% (99.99%) fidelity in about 17ns (23ns) with a realistic two-parameter pulse profile, plus two auxiliary z rotations. The fidelity measure we refer to here is a state-averaged intrinsic process fidelity, which does not include any effects of noise or decoherence. These results apply to a multi-qubit device that includes strongly coupled memory resonators. We investigate the performance of the qubit-bus CZ gate as a function of qubit anharmonicity, indentify the dominant intrinsic error mechanism and derive an associated fidelity estimator, quantify the pulse shape sensitivity and precision requirements, simulate qubit-qubit CZ gates that are mediated by the bus resonator, and also attempt a global optimization of system parameters including resonator frequencies and couplings. Our results are relevant for a wide range of superconducting hardware designs that incorporate resonators and suggest that it should be possible to demonstrate a 99.9% CZ gate with existing transmon qubits, which would constitute an important step towards the development of an error-corrected superconducting quantum computer.
description: 22 pages
title: МОРФОЛОГИЧЕСКИЕ ПРИЗНАКИ ЯИЦ КУР В ЗАВИСИМОСТИ ОТ НАПРАВЛЕНИЯ СЕЛЕКЦИИ. СБОРНИК НАУЧНЫХ ТРУДОВ КНЦЗВ. - 2019. - Т. 8. - № 1
Creators: name: Щербинина , Мария
name: Щербатов , Вячеслав
Publisher: name: ФГБНУ КНЦЗВ
Year: 2019

description: Проводился сравнительный анализ яиц кур разных направлений продуктивности в разные периоды яйцекладки. Установлены особенности проявления морфологических признаков яиц кур позволяющие оценивать долю и массу желтка по физическим параметрам.
description: The comparative analysis of eggs of hens of different directions of productivity in different periods of oviposition was carried out. Features of manifestation of morphological signs of eggs of hens allowing to estimate a share and weight of yolk on physical parameters are established.
THE ROLE OF PEDAGOGICAL TECHNOLOGIES IN IMPROVING THE QUALITY OF EDUCATION
Creators: name: Khudaynazarova, Zulayho
Publisher: name: Zenodo
Year: 2024

description: In this article, the expressions of pedagogical technologies, educational technology, teaching technology are often mentioned in the current pedagogical science. To date, in the pedagogical literature, reports on educational problems, in official documents, the concepts of "new pedagogical technology", "advanced pedagogical technology", "modern educational technology" have not yet been put into one mold, as has been explained in encyclopedias, a single interpretation of its content has not been developed, and therefore there are many definitions of the phrase that differ from each other. Opinions and comments on the role of pedagogical technologies in improving the quality of training are made.
Rotating Radio Transients and Their Place Among Pulsars
Creators: name: Burke-Spolaor, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Six years ago, the discovery of Rotating Radio Transients (RRATs) marked what appeared to be a new type of sparsely-emitting pulsar. Since 2006, more than 70 of these objects have been discovered in single-pulse searches of archival and new surveys. With a continual inflow of new information about the RRAT population in the form of new discoveries, multi-frequency follow-ups, coherent timing solutions, and pulse rate statistics, a view is beginning to form of the place in the pulsar population RRATs hold. Here we review the properties of neutron stars discovered through single pulse searches. We first seek to clarify the definition of the term RRAT, emphasising that "the RRAT population" encompasses several phenomenologies. A large subset of RRATs appear to represent the tail of an extended distribution of pulsar nulling fractions and activity cycles; these objects present several key open questions remaining in this field.
description: Proceedings of IAUS 291 "Neutron Stars and Pulsars: Challenges and Opportunities after 80 years", J. van Leeuwen (ed.); 6 pages, 2 figures
Studien zur Totalsynthese von Integramycin
Creators: name: Rosin, Thomas
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: natural product
subject: total synthesis
subject: organic chemistry
subject: Totalsynthese
subject: organische Chemie
subject: HIV
subject: Integrase
subject: Naturstoff
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Integramycin wurde 2002 in der Arbeitsgruppe von Singh et. al. aus dem Bakterium Actinoplanes sp. isoliert. Dieser Naturstoff inhibiert die Integrase des HI-Viurs (Strangtransfer-Assays, IC50 = 4 μM). Für Integramycin gibt es keine Totalsynthese oder SAR-Studien. Der Naturstoff kann in drei verschiedene Teile unterteilt werden, Spiroketal-Fragment, Decalin-Kern und Tetramsäure, für die bereits Partialsynthesen existieren. Das Ziel dieser Arbeit ist die Totalsynthese von Integramycin.
Gaussian Curvature and Global effects : gravitational Aharonov-Bohm effect revisited
Creators: name: Nouri-Zonoz, M.
name: Parvizi, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using the Gauss-Bonnet formula, integral of the Gaussian curvature over a 2-surface enclosed by a curve in the asymptotically flat region of a static spacetime was found to be a measure of a gravitational analogue of Aharonov-Bohm effect by Ford and Vilenkin in the linearized regime. Employing the 1+3 formulation of spacetime decomposition we study the same effect in the context of full Einstein field equations for stationary spacetimes. Applying our approach to static tube-like and cylindrical distributions of dust not only we recover their result but also obtain an extra term which is interpreted to be representing the classical version of the Colella-Overhauser-Werner effect (the COW experiment).
description: 14 pages,2 figures, RevTex
The relational space collage: sea PET scenario and participatory plastic waste workshop bricolage
Creators: name: Dimitrijevic, Katarina
name: Harland, Robert G.
Publisher: name: Loughborough University
Year: 2024

description: This is a conference presentation from Opening the Bin 3 – Waste, Economy, Culture and Society: 'One word, one bin?', Lancaster University Management School, 15th – 17th June 2023.
Molecular Dynamics Simulations of Evaporation-Induced Nanoparticle Assembly
Creators: name: Cheng, Shengfeng
name: Grest, Gary S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: While evaporating solvent is a widely used technique to assemble nano-sized objects into desired superstructures, there has been limited work on how the assembled structures are affected by the physical aspects of the process. We present large scale molecular dynamics simulations of the evaporation-induced assembly of nanoparticles suspended in a liquid that evaporates in a controlled fashion. The quality of the nanoparticle crystal formed just below the liquid/vapor interface is found to be better at relatively slower evaporation rates, as less defects and grain boundaries appear. This trend is understood as the result of the competition between the accumulation and diffusion times of nanoparticles at the liquid/vapor interface. When the former is smaller, nanoparticles are deposited so fast at the interface that they do not have sufficient time to arrange through diffusion, which leads to the prevalence of defects and grain boundaries. Our results have important implications in understanding assembly of nanoparticles and colloids in non-equilibrium liquid environments.
description: 8 pages, 5 figures, to appear in Journal of Chemical Physics
title: Male song individuality over female breeding periods in Savannah sparrows (Passerculus sandwichensis)
Creators: name: Sung, Ha-Cheol
name: Handford, Paul
Publisher: name: Senckenberg Gesellschaft für Naturforschung
Year: 2019

description: Song individuality in songbirds is a prerequisite for individual recognition, which plays an important role in communication between pair members, relatives, or neighbors. We investigated song individuality of Savannah sparrow (Passerculus sandwichensis) males over a single breeding season. We recorded songs from 11 color-banded males during each of the four female breeding periods (pre-pairing, pairing and egg-laying, incubation, and nestling and fledging). We analyzed 10 songs from each male, with 13 temporal and nine frequency variables that represented the structural characteristics of songs to examine individual variation throughout the breeding season. The results of nested analysis of variance (ANOVA) showed that all song variables differed among individuals across breeding periods and among breeding periods across individual songs except for F9 (peak frequency difference between the frist and the second trill parts). A discriminant function analysis showed that songs of pre-pairing periods were clearly separated from those of the other periods. These results suggest that the songs of males display individuality and maintain potential information about his mating status and his mate’s reproductive condition across the breeding season.
title: Methods for the Investigation of Transonic Buffet
Creators: name: Belesiotis, Panagiotis
Publisher: name: University of Liverpool Repository
Year: 2023

description: Transonic buffet is an unsteady shock-wave/boundary-layer interaction phenomenon, encountered in large civil or military aircraft at edge-of-the-envelope conditions. The interaction of the unsteady aerodynamic loads with the elastic wing structure can pose a risk of structural failure and thus the absence of any structural vibration or buffeting at cruise conditions is a certification requirement by regulatory authorities. A thorough understanding of the mechanisms that govern the phenomenon is of paramount importance in order to face the engineering challenges that are associated with designing future wings that push the limits of the flight envelope. This present work aims to address the interaction of the phenomenon with wing vibration and to investigate the effect of transient growth on aerofoil transonic buffet. This is achieved by performing three different but related studies. The first one focuses on harmonically exciting the flow at steady and unsteady conditions. It is found that in contrast to aerofoil shock-buffet, that demonstrates full synchronisation to the excitation for certain combinations of excitation frequency and amplitude, the harmonic excitation of the wing only affects the high-frequency behaviour of the phenomenon associated with a global mode, while the low frequency behaviour remains unaffected. For the second study, a coupled fluid-structure simulation was carried out at unsteady conditions. This revealed that, while the initial linear structural response depends on the buffet frequency for all modes, this only holds for structural modes with natural frequencies close to that of buffet in the nonlinear part of the response. A dependence on their respective wind-off structural frequency and the first bending mode is found for lower frequency structural modes in the nonlinear part of the response. For the last study, transient growth analysis is applied at a supercritical aerofoil in steady and unsteady conditions. To the best of the author's knowledge, this is the first transient growth study on an aerofoil in transonic flow subject to shock buffet. Modest growth of optimal initial perturbations is observed. A quartic dependence of the maximum energy attained on the angle of attack is found for pre-onset conditions. These findings will help advance the understanding of the underlying physics of transonic buffet and ultimately inform future wing design.
Influence of the ultrasonic vibration amplitude on the melt pool dynamics and the weld shape of laser beam welded EN AW-6082 utilizing a new excitation system for laser beam welding
Creators: name: Ohrdes, H.
name: Nothdurft, S.
name: Nowroth, C.
name: Grajczak, J.
name: Twiefel, J.
name: Hermsdorf, J.
name: Kaierle, S.
name: Wallaschek, J.
Publisher: name: Berlin : Springer
Year: 2021
Subjects: subject: Aluminum alloy
subject: Excitation methods
subject: Laser beam welding
subject: Melt pool dynamics
subject: Ultrasound
subject: Weld shape
subject: Aluminum alloys
subject: Dissimilar materials
subject: Laser beams
subject: Laser excitation
subject: Ultrasonic effects
subject: Ultrasonic testing
subject: Ultrasonic waves
subject: Welds
subject: Electronic controls
subject: Longitudinal vibrations
subject: Piezoelectric converter
subject: Process performance
subject: Ultrasonic amplitude
subject: Ultrasonic excitation
subject: Ultrasonic vibration
subject: Vibration amplitude
subject: Vibrations (mechanical)
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Laser beam welding is a commonly used technology for joining similar and dissimilar materials. In order to improve the mechanical properties of the weld, the introduction of ultrasonic vibration into the weld zone has been proposed [5]. The ultrasonic system consists of an electronic control, a power supply, a piezoelectric converter and a sonotrode, which introduces the vibration into the weld zone. Its proper design is of great importance for the process performance. Furthermore, the effects of ultrasound in a melt pool need to be understood to evaluate and optimize the process parameters. In addition, it is important to find out the limits of ultrasonic excitation with respect to a maximum vibration amplitude. Therefore, firstly different methods of ultrasonic excitation are investigated and compared with respect to their performance. A system which is based on using longitudinal vibrations turns out to be the best alternative. Secondly, the system design is described in detail to understand the boundary conditions of the excitation and finally, simulations about the influence of ultrasonic vibrations are done by using a simplified model. The system is used to perform experiments, which aim at detecting the maximum vibration amplitude doing bead on plate welds of EN AW-6082 aluminum alloy. The experiments reveal a significant change of the weld shape with increasing ultrasonic amplitude, which matches the simulative findings. If the amplitudes are small, there is a marginal effect on the weld shape. If the amplitudes are high, melt is ejected and the weld shape is disturbed. In the present case, amplitudes over 4 µm were found to disturb the weld shape. © 2021, The Author(s).
Assessment of land use land cover dynamics and its contributing factors in Adama district, central Ethiopia
Creators: name: Masha, Mamush
name: Belayneh, Mengie
name: Tedila, Gemechu
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2023

description: Land use land cover change has resulted negative consequences for the quality of environment and life of rural livelihoods in Ethiopia in general and the study area in particular. The aim of this study was to investigate the spatial and temporal Land Use/Land Cover Changes and its contributing factors in Adama District, Oromia regional sate, central Ethiopia. The three periods of satellite imageries (Landsat 4-5TM 1990, Landsat7 ETM+ 2000 and Landsat 8 OLI/TIRS 2020) were used to detect the changes. By using simple random sampling technique, 240 respondents were selected, and questionnaires, interviews and field observations were used to collect the data. The collected data were analyzed by using ArcGIS 10.5; ERDAS imagine 2015, SPSS version 23 and excels 2010 software. The determinants variables of land use land cover changes were assessed using multiple regression model. The results showed that there was continuous expansion of cultivated land and settlement area, which increased by the rate of 935.3 and 797.1 hectares per year respectively during the study period of 1990 to 2020. On the other hand, water bodies, forest and shrub land reduced with rate of (-112.03), (-870.2), (-759) hectares per year respectively. This indicates that an increased deforestation together with poor land management practices has accelerated land cover changes. Rapid urbanization, settlement expansion and population growth, expansion of agricultural land, need for fuel wood and construction materials are the main driving forces to the land use /cover dynamics in the district. This suggest that there is a need to protect the fragile environment by implementing sustainable land management practice through integrated participatory approach. Besides, long and short term training need to be arranged for all farmers/stakeholders toward land use land cover changes of the district.
description: EQA - International Journal of Environmental Quality, Vol. 55 (2023)
Survey on plant parasitic nematode associated with grapevine (Vitis vinifera L.) at federal college of horticulture Dadin-Kowa Gombe Nigeria
Creators: name: Iliya Jidere, Caleb
name: Dada Simon, Lilian
name: Usman, Ibrahim
name: Peter, Abraham
name: Sulaiman, Ibrahim
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2023

description: The grapevine (Vitis vinifera L.) from the Vitaceae family is one of the world's most important economic fruit crops. It is consumed fresh and processed into various products such as wine, juice, and raisins; 71% of global grape production is used for wine, 27% for fresh fruits, and 2% for raisins (dried fruit). Grapevines have numerous nutritional and economic benefits; however, their production faces numerous challenges, one of which is the pathogen plant parasitic nematodes, which cause significant losses. The goal of the study was to identify plant parasitic nematodes associated with five grapevine varieties at the Federal College of Horticulture in Dadin-Kowa Gombe State. A total of 150 soil samples were collected from five different varieties of grapevines (Bangalore blue, Muscadine, Pinotnoir, Pantara, and Jitawa) using soil augers at a depth of 0–25 cm. PPN were extracted using the whitehead and Hemming tray methods, and a pictorial key was used for PPN identification. A total of ten PPNs (Meloidogyne spp., Paratylenchus spp., Xiphinema spp., Scutellenema spp., Longidorus spp., Heterodera spp., Aphelenchoides spp., Trichodorus spp., Hoplolaimus spp., and Rotylenchus spp. M. incognita had the highest population density, frequency of occurrence (100%), and relative abundance (>20%) of the varieties studied. When compared to the other grapevine varieties sampled, the Shannon-H index revealed a high diversity of nematode species on Pinotnoir and Bangalore Blue. The evenness (eH/S) index indicated that there was no even distribution of PPN among the varieties studied, and Meloidogyne spp. were found to be dominant on some varieties. Similarly, species richness according to the Margalef index was very high among all five varieties. This is the first report of plant parasitic nematodes associated with grapevine in Gombe State. As such, there is a need for policy makers, researchers, and extension workers to give more attention to this farmer's hidden enemy in terms of control strategies and raising awareness among the farmers on its effects and how to effectively manage them.
description: EQA - International Journal of Environmental Quality, Vol. 55 (2023)
Neuartiges Messverfahren zur Erfassung interner Größen elektrischer Antriebsmaschinen
Creators: name: Bethke, Florian
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: Elektroantrieb
subject: Sensorik
subject: maschineninterne Messgrößen
subject: Messspule
subject: Magnetfeldsensor
subject: 620
subject: Elektroantrieb
subject: Sensortechnik
subject: Messgröße
subject: Messspule
subject: Magnetfeldsensor

description: Zugleich: Dissertation, Universität Kassel, 2022
Effect of Geometric Uncertainties on the Aerodynamic Characteristic of Offshore Wind Turbine Blades
Creators: name: Ernst, Benedikt
name: Schmitt, Henning
name: Seume, Jörg R.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2014
Subjects: subject: design
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Offshore wind turbines operate in a complex unsteady flow environment which causes unsteady aerodynamic loads. The unsteady flow environment is characterized by a high degree of uncertainty. In addition, geometry variations and material imperfections also cause uncertainties in the design process. Probabilistic design methods consider these uncertainties in order to reach acceptable reliability and safety levels for offshore wind turbines. Variations of the rotor blade geometry influence the aerodynamic loads which also affect the reliability of other wind turbine components. Therefore, the present paper is dealing with geometric uncertainties of the rotor blades. These can arise from manufacturing tolerances and operational wear of the blades. First, the effect of geometry variations of wind turbine airfoils on the lift and drag coefficients are investigated using a Latin hypercube sampling. Then, the resulting effects on the performance and the blade loads of an offshore wind turbine are analyzed. The variations of the airfoil geometry lead to a significant scatter of the lift and drag coefficients which also affects the damage-equivalent flapwise bending moments. In contrast to that, the effects on the power and the annual energy production are almost negligible with regard to the assumptions made.
Simulations of the galaxy population constrained by observations from z=3 to the present day: implications for galactic winds and the fate of their ejecta
Creators: name: Henriques, Bruno
name: White, Simon
name: Thomas, Peter
name: Angulo, Raul
name: Guo, Qi
name: Lemson, Gerard
name: Springel, Volker
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We apply Monte Carlo Markov Chain (MCMC) methods to large-scale simulations of galaxy formation in a LambdaCDM cosmology in order to explore how star formation and feedback are constrained by the observed luminosity and stellar mass functions of galaxies. We build models jointly on the Millennium and Millennium-II simulations, applying fast sampling techniques which allow observed galaxy abundances over the ranges 7
description: 25 pages, 14 figures, submitted to MNRAS
Augmenting Milling Process Data for Shape Error Prediction
Creators: name: Denkena, Berend
name: Dittrich, Marc-André
name: Uhlich, Florian
Publisher: name: Amsterdam : Elsevier B.V.
Year: 2016
Subjects: subject: Cutting
subject: Cyber-Physical Systems
subject: Modeling
subject: Simulation
subject: Embedded systems
subject: Errors
subject: Forecasting
subject: Machine tools
subject: Manufacture
subject: Milling (machining)
subject: Models
subject: Continuous transformations
subject: Cutting conditions
subject: Cutting parameters
subject: Cyber physical systems (CPSs)
subject: Multi-dimensional model
subject: One-dimensional model
subject: Prediction accuracy
subject: Metadata
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: New integrated sensors and connected machine tools generate a tremendous amount of in-depth process data. The continuous transformation of the obtained data into deployable machining knowledge allows for faster ramp-ups, more reliable process outcome and higher profitability. A system for recording data from various sources - including a simultaneous material removal simulation - is implemented to aggregate and store process data. In addition to the simulation results, process data from the machine control, cutting forces and shape error samples are collected. A series of slot milling processes are carried out with varying cutting speed, feed per tooth and width of cut in a full factional design. In order to continuously evaluate process data, automatized methods are required. This is achieved using the simulation results to determine all relevant cutting conditions. Dependencies between cutting parameters, sensor signals and cutting result are identified and quantified. However, a one-dimensional model does not predict the shape error accurately. As an alternative model, a multidimensional model based on a Support Vector Machine is trained, using process forces and simulation data. The obtained prediction accuracy is significantly higher compared to the one-dimensional model and can be used to design highly reliable cutting processes.
PubChem lists to Study the Exposome of Mild Cognitive Impairment and Alzheimer's Disease on Cerebrospinal Fluid
Creators: name: Andújar, Begoña Talavera
name: Mary, Arnaud
name: Cheng, Tiejun
name: Zaslavsky, Leonid
name: Bolton, Evan E.
name: Heneka, Michael T.
name: Schymanski, Emma L.
Publisher: name: Zenodo
Year: 2023
Subjects: Alzheimer's disease
CSF
non-target screening
suspect screening
mass spectrometry
exposomics
metabolomics

description: Collection of 4 lists of chemicals associated to Alzheimer's disease (AD) and related disorders. The following table describes the mentioned lists. Name Description AD-database Database of 41,917 chemicals related to AD and other neurodegenerative disorders. CIDs co-ocurring with the 27 selected MeSH terms (*see below) were merged and mapped to the parent CIDS. TOP1 List of 1,268 chemicals having D000544 (AD MeSH code) as the first neighbor . SC20 List of 247 chemicals created after truncating by 1/20 of the maximum co-ocurrence score of the chemical neighbors for D000544. AD-CTD List of 86 chemicals specifically related to AD in the Comparative Toxicogenomic Database (CTD) *Selected MeSH terms for the AD-database: D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647,D000647 and D000647. HMDB-CSF can be downloaded here. PubChemLite for Exposomics (version 1.12.0) can be found here.
Ontologie-basierte Modellierung und Synthese von Bordnetzdaten für die Zuverlässigkeitsanalyse
Creators: name: Balandi, Oguzhan
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: Ontologie
subject: Wissensgraphen
subject: Bordnetzentwicklung
subject: Zuverlässigkeit
subject: Kabelbaumliste
subject: ontology
subject: knowledge graphs
subject: wiring harness development
subject: reliability
subject: vehicle electric container
subject: 620
subject: Ontologie
subject: Wissensgraph
subject: Bordnetz
subject: Zuverlässigkeit
subject: Daten

description: Zugleich: Dissertation, Universität Kassel, 2021
title: And Or Not – the system, the body and time
Creators: name: Fay, Brian
Publisher: name: Technological University of Dublin
Year: 2015

description: This catalogue text discusses artists and artworks featured in the exhibition BOOLEAN EXPRESSIONS: Contemporary Art and Mathematical Data, presented at The Lewis Glucksman Gallery, University College Cork, Ireland, 23 July – 8 November 2015. For an overview of the exhibition see the link https://vimeo.com/137620854
Cyber-physical production systems combined with logistic models - a learning factory concept for an improved production planning and control
Creators: name: Seitz, Kai-Frederic
name: Nyhuis, Peter
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: Cyber-physical production system
subject: Learning factory
subject: Logistics
subject: Embedded systems
subject: Engineering education
subject: Planning
subject: Production control
subject: Control and monitoring
subject: Cyber physical systems (CPSs)
subject: Individualized products
subject: Logistic performance
subject: Manufacturing engineering
subject: Production planning and control
subject: Production system
subject: Personnel training
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: Nowadays, production enterprises are faced with an array of challenges including increasing pressure regarding costs, demands for individualized products as well as the growing significance of logistic performance and costs, to name just a few. These in turn give rise to special requirements that the production planning, control and monitoring, among others, need to meet with suitable methods and techniques. Within this context, developments such as Industry 4.0 and cyber-physical production systems on the technology side, and approaches such as innovative learning factories for training employees hold great potential. This paper clarifies the advantages of cyber-physical systems in view of production planning, controlling and monitoring. Based on that, using the concept of IFA's Learning Factory, it describes how these can be specifically utilized in applying logistic models to improve order processing.
The standard model of low-mass star formation applied to massive stars: a multi-wavelength picture of AFGL 2591
Creators: name: Johnston, K. G.
name: Shepherd, D. S.
name: Robitaille, T. P.
name: Wood, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper aims to investigate the hypothesis that the embedded luminous star AFGL2591-VLA3 (2.3E5Lsun at 3.33kpc) is forming according to a scaled-up version of a low-mass star formation scenario. We present multi-configuration VLA 3.6cm and 7mm, as well as CARMA C18O and 3mm continuum observations to investigate the morphology and kinematics of the ionized gas, dust, and molecular gas around AFGL2591. We also compare our results to ancillary near-IR images, and model the SED and 2MASS image profiles of AFGL2591 using a dust continuum radiative transfer code. The observed 3.6cm images uncover for the first time that the central powering source AFGL2591-VLA3 has a compact core plus collimated jet morphology, extending 4000AU eastward from the central source with an opening angle of <10deg at this radius. However, at 7mm VLA3 does not show a jet morphology, but instead compact (<500AU) emission, some of which (<0.57 mJy of 2.9mJy) is estimated to be from dust. We determine that the momentum rate of the jet is not sufficient to ionize itself via only shocks, and thus a significant portion of the emission is instead likely created in a photoionized wind. The C18O emission uncovers dense entrained material in the outflow(s) from the young stars in the region. The main features of the SED and 2MASS images of AFGL2591-VLA3 are also reproduced by our model dust geometry of a rotationally flattened envelope with and without a disk. The above results are consistent with a picture of massive star formation similar to that seen for low-mass protostars. However, within its envelope, AFGL2591-VLA3 contains at least four other young stars, constituting a small cluster. Therefore it appears that AFGL2591-VLA3 may be able to source its accreting material from a shared gas reservoir while still exhibiting the phenomena expected during the formation of low-mass stars. (Abridged)
description: 23 pages, 15 figures, 8 tables. To be published in Astronomy & Astrophysics