cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Amtliche Mitteilungen der Universität Dortmund Nr. 03/90
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1990
Subjects: subject: 080

description: Dritte Änderung der Geschäftsordnung des Senates der Universität Dortmund vom 04. Januar 1990
description: Neubekanntmachung der Geschäftsordnung des Senates der Universität Dortmund
description: Amtliche Mitteilungen der Universität Dortmund ; 3, 1990
Multiwavelength observations of PSR J2021+4026 across a mode change reveal a phase shift in its X-ray emission
Creators: name: Razzano, M.
name: Fiori, A.
name: Parkinson, P. M. Saz
name: Mignani, R. P.
name: De Luca, A.
name: Harding, A. K.
name: Kerr, M.
name: Marelli, M.
name: Testa, V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. We have investigated the multiwavelength emission of PSR J2021+4026, the only isolated gamma-ray pulsar known to be variable, which in October 2011 underwent a simultaneous change in gamma-ray flux and spin-down rate, followed by a second mode change in February 2018. Multiwavelength monitoring is crucial to understand the physics behind these events and how they may have affected the structure of the magnetosphere. Aims.The monitoring of pulse profile alignment is a powerful diagnostic tool for constraining magnetospheric reconfiguration. We aim to investigate timing or flux changes related to the variability of PSR J2021+4026 via multiwavelength observations, including gamma-ray observations from Fermi-LAT, X-ray observations from XMM-Newton, and a deep optical observation with the Gran Telescopio Canarias.Methods. We performed a detailed comparison of the timing features of the pulsar in gamma and X-rays and searched for any change in phase lag between the phaseogram peaks in these two energy bands. Although previous observations did not detect a counterpart in visible light, we also searched for optical emission that might have increased due to the mode change, making this pulsar detectable in the optical. Results.We have found a change in the gamma-to X-ray pulse profile alignment by 0.21$\pm$0.02 in phase, which indicates that the first mode change affected different regions of the pulsar magnetosphere. No optical counterpart was detected down to g'=26.1 and r'=25.3. Conclusions.We suggest that the observed phase shift could be related to a reconfiguration of the connection between the quadrupole magnetic field near the stellar surface and the dipole field that dominates at larger distances. This is consistent with the picture of X-ray emission coming from the heated polar cap and with the simultaneous flux and frequency derivative change observed during the mode changes.
description: 9 pages, 7 figures, 1 Table. Accepted for publication in Astronomy and Astrophysics (A&A)
Association between vitamin D status and eryptosis : results from the German National Cohort Study
Creators: name: Ewendt, Franz
name: Föller, Michael
name: Schmitt, Marvin
name: Kluttig, Alexander
name: Kühn, Julia
name: Hirche, Frank
name: Kraus, Frank Bernhard
name: Ludwig-Kraus, Beatrice
name: Mikolajczyk, Rafael
name: Wätjen, Wim
name: Bürkner, Paul-Christian
name: Stangl, Gabriele I.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Vitamin D, besides its classical effect on mineral homeostasis and bone remodeling, can also modulate apoptosis. A special form of apoptosis termed eryptosis appears in erythrocytes. Eryptosis is characterized by cell shrinkage, membrane blebbing, and cell membrane phospholipid disorganization and associated with diseases such as sepsis, malaria or iron deficiency, and impaired microcirculation. To our knowledge, this is the first study that linked vitamin D with eryptosis in humans. This exploratory cross-sectional trial investigated the association between the vitamin D status assessed by the concentration of plasma 25-hydroxyvitamin D (25(OH)D) and eryptosis. Plasma 25(OH)D was analyzed by LC–MS/MS, and eryptosis was estimated from annexin V-FITC-binding erythrocytes by FACS analysis in 2074 blood samples from participants of the German National Cohort Study. We observed a weak but clear correlation between low vitamin D status and increased eryptosis (r = − 0.15; 95% CI [− 0.19, − 0.10]). There were no differences in plasma concentrations of 25(OH)D and eryptosis between male and female subjects. This finding raises questions of the importance of vitamin D status for eryptosis in terms of increased risk for anemia or cardiovascular events.
title: Подъемно-транспортные машины
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2022

description: Учебник имеет два раздела: «Грузоподъемные машины» и «Транспортирующие машины». В разделе «Грузоподъемные машины» приведены общие сведения о грузоподъемных устройствах и машинах, применяемых в сельском хозяйстве, их основные характеристики и расчетные нагрузки. Представлен необходимый материал о деталях и сборочных единицах, о тормозных устройствах и приводах, используемых в грузоподъемных машинах. Даются основы проектирования и расчета механизмов подъема, передвижения, поворота. Рассматриваются методы расчета металлоконструкций, оценка устойчивости кранов, вопросы организации безопасной эксплуатации грузоподъемных машин. В разделе «Транспортирующие машины» рассмотрены виды транспортирующих машин, применяемые в сельском хозяйстве, факторы, влияющие на их выбор. Приведен анализ технологических свойств сельскохозяйственных грузов. Рассмотрены вопросы расчета ленточных, скребковых, винтовых конвейеров, ковшовых элеваторов и пневмотранспортных установок. Методические указания по проектированию и расчету подъемно-транспортных машин изложены с учетом требований стандартов ISO. Приведены необходимые справочные материалы и примеры расчета. Каждая глава заканчивается контрольными вопросами. Учебник подготовлен в соответствии с требованиями Федерального государственного образовательного стандарта высшего образования. Предназначен для студентов, изучающих дисциплины «Детали машин, основы конструирования и подъемно-транспортные машины», «Подъемно-транспортные машины».
Glycation leads to increased invasion of glioglastoma cells
Creators: name: Schildhauer, Paola
name: Selke, Philipp
name: Scheller, Christian
name: Strauss, Christian
name: Horstkorte, Rüdiger
name: Leisz, Sandra
name: Scheer, Maximilian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Glioblastoma (GBM) is a highly aggressive and invasive brain tumor with a poor prognosis despite extensive treatment. The switch to aerobic glycolysis, known as the Warburg effect, in cancer cells leads to an increased production of methylglyoxal (MGO), a potent glycation agent with pro-tumorigenic characteristics. MGO non-enzymatically reacts with proteins, DNA, and lipids, leading to alterations in the signaling pathways, genomic instability, and cellular dysfunction. In this study, we investigated the impact of MGO on the LN229 and U251 (WHO grade IV, GBM) cell lines and the U343 (WHO grade III) glioma cell line, along with primary human astrocytes (hA). The results showed that increasing concentrations of MGO led to glycation, the accumulation of advanced glycation end-products, and decreasing cell viability in all cell lines. The invasiveness of the GBM cell lines increased under the influence of physiological MGO concentrations (0.3 mmol/L), resulting in a more aggressive phenotype, whereas glycation decreased the invasion potential of hA. In addition, glycation had differential effects on the ECM components that are involved in the invasion progress, upregulating TGFβ, brevican, and tenascin C in the GBM cell lines LN229 and U251. These findings highlight the importance of further studies on the prevention of glycation through MGO scavengers or glyoxalase 1 activators as a potential therapeutic strategy against glioma and GBM.
Universal short-time dynamics: boundary functional renormalization group for a temperature quench
Creators: name: Chiocchetta, Alessio
name: Gambassi, Andrea
name: Diehl, Sebastian
name: Marino, Jamir
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a method to calculate short-time non-equilibrium universal exponents within the functional renormalization-group scheme. As an example, we consider the classical critical dynamics of the relaxational model A after a quench of the temperature of the system and calculate the initial slip exponent which characterizes the non-equilibrium universal short-time behaviour of both the order parameter and correlation functions. The value of this exponent is found to be consistent with the result of a perturbative dimensional expansion and of Monte Carlo simulations in three spatial dimensions.
Intensity-dependent cardiopulmonary response during and after strength training
Creators: name: Lässing, Johannes
name: Maudrich, Tom
name: Kenville, Rouven
name: Uyar, Zarah
name: Bischoff, Christian
name: Fikenzer, Sven
name: Busse, Martin
name: Falz, Roberto
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Whereas cardiopulmonary responses are well understood in endurance training, they are rarely described in strength training. This cross-over study examined acute cardiopulmonary responses in strength training. Fourteen healthy male strength training-experienced participants (age 24.5 ± 2.9 years; BMI 24.1 ± 2.0 kg/m2) were randomly assigned into three strength training sessions (three sets of ten repetitions) with different intensities (50%, 62,5%, and 75% of the 3-Repetition Maximum) of squats in a smith machine. Cardiopulmonary (impedance cardiography, ergo-spirometry) responses were continuously monitored. During exercise period, heart rate (HR 143 ± 16 vs. 132 ± 15 vs. 129 ± 18 bpm, respectively; p < 0.01; η2p 0.54) and cardiac output (CO: 16.7 ± 3.7 vs. 14.3 ± 2.5 vs. 13.6 ± 2.4 l/min, respectively; p < 0.01; η2p 0.56) were higher at 75% of 3-RM compared to those at the other intensities. We noted similar stroke volume (SV: p = 0.08; η2p 0.18) and end-diastolic volume (EDV: p = 0.49). Ventilation (VE) was higher at 75% compared to 62.5% and 50% (44.0 ± 8.0 vs. 39.6 ± 10.4 vs. 37.6 ± 7.7 l/min, respectively; p < 0.01; η2p 0.56). Respiration rate (RR; p = .16; η2p 0.13), tidal volume (VT: p = 0.41; η2p 0.07) and oxygen uptake (VO2: p = 0.11; η2p 0.16) did not differ between intensities. High systolic and diastolic blood pressure were evident (62.5% 3-RM 197 ± 22.4/108.8 ± 13.4 mmHG). During the post-exercise period (60 s), SV, CO, VE, VO2, and VCO2 were higher (p < 0.01) than during the exercise period, and the pulmonary parameters differed markedly between intensities (VE p < 0.01; RR p < 0.01; VT p = 0.02; VO2 p < 0.01; VCO2 p < 0.01). Despite the differences in strength training intensity, the cardiopulmonary response reveals significant differences predominantly during the post-exercise period. Intensity-induced breath holding induces high blood pressure peaks and cardiopulmonary recovery effects after exercise.
Topological solitonic macromolecules
Creators: name: Zhao, Hanqing
name: Malomed, Boris A.
name: Smalyukh, Ivan I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Being ubiquitous, solitons have particle-like properties, exhibiting behaviour often associated with atoms. Bound solitons emulate dynamics of molecules, though solitonic analogues of polymeric materials have not been considered yet. Here we experimentally create and model soliton polymers, which we call polyskyrmionomers, built of atom-like individual solitons characterized by the topological invariant representing the skyrmion number. With the help of nonlinear optical imaging and numerical modelling based on minimizing the free energy, we reveal how topological point defects bind the solitonic quasi-atoms into polyskyrmionomers, featuring linear, branched, and other macromolecule-resembling architectures, as well as allowing for encoding data by spatial distributions of the skyrmion number. Application of oscillating electric fields activates diverse modes of locomotion and internal vibrations of these self-assembled soliton structures, which depend on symmetry of the solitonic macromolecules. Our findings suggest new designs of soliton meta matter, with a potential for the use in fundamental research and technology.
description: to be published in Nature Communications
Identifying genomic regions determining shoot and root traits related to nitrogen uptake efficiency in a multiparent advanced generation intercross (MAGIC) winter wheat population in a high-throughput phenotyping facility
Creators: name: Schmidt, Laura
name: Jacobs, John
name: Schmutzer, Thomas
name: Alqudah, Ahmad M.
name: Sannemann, Wiebke
name: Pillen, Klaus
name: Maurer, Andreas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 580

description: In the context of a continuously increasing human population that needs to be fed, with environmental protection in mind, nitrogen use efficiency (NUE) improvement is becoming very important. To understand the natural variation of traits linked to nitrogen uptake efficiency (UPE), one component of NUE, the multiparent advanced generation intercross (MAGIC) winter wheat population WM-800 was phenotyped under two contrasting nitrogen (N) levels in a high-throughput phenotyping facility for six weeks. Three biomass-related, three root-related, and two reflectance-related traits were measured weekly under each treatment. Subsequently, the population was genetically analysed using a total of 13,060 polymorphic haplotypes and singular SNPs for a genome-wide association study (GWAS). In total, we detected 543 quantitative trait loci (QTL) across all time points and traits, which were pooled into 42 stable QTL (sQTL; present in at least three of the six weeks). Besides Rht-B1 and Rht-D1, candidate genes playing a role in gibberellic acid-regulated growth and nitrate transporter genes from the NPF gene family, like NRT 1.1, were linked to sQTL. Two novel sQTL on chromosomes 5 A and 6D showed pleiotropic effects on several traits. The high number of N-specific sQTL indicates that selection for UPE is useful specifically under N-limited conditions.
Shining Light on Quantum Gravity with Pulsar-Black Hole Binaries
Creators: name: Estes, John
name: Kavic, Michael
name: Lippert, Matthew
name: Simonetti, John H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Pulsars are some of the most accurate clocks found in nature, while black holes offer a unique arena for the study of quantum gravity. As such, pulsar-black hole (PSR-BH) binaries provide ideal astrophysical systems for detecting the effects of quantum gravity. With the success of aLIGO and the advent of instruments like the SKA and eLISA, the prospects for the discovery of such PSR-BH binaries are very promising. We argue that PSR-BH binaries can serve as ready-made testing grounds for proposed resolutions to the black hole information paradox. We propose using timing signals from a pulsar beam passing through the region near a black hole event horizon as a probe of quantum gravitational effects. In particular, we demonstrate that fluctuations of the geometry outside a black hole lead to an increase in the measured root mean square deviation of the arrival times of pulsar pulses traveling near the horizon. This allows for a clear observational test of the nonviolent nonlocality proposal for black hole information escape. For a series of pulses traversing the near-horizon region, this model predicts an rms in pulse arrival times of $\sim30\ μ$s for a $3 M_\odot$ black hole, $\sim0.3\, $ms for a $30 M_\odot$ black hole, and $\sim40\, $s for Sgr A*. The current precision of pulse time-of-arrival measurements is sufficient to discern these rms fluctuations. This work is intended to motivate observational searches for PSR-BH systems as a means of testing models of quantum gravity.
description: 11 pages, 1 figure; v2: references added; v3: improved discussion of lensing and reference added, to be published in ApJ
Factors Affecting Credit Risk Management of Development Bank of Ethiopia, Addis Ababa
Creators: name: Mignot, Getachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The study assessed factors that affect credit risk management in developmental bank of Ethiopia of (DBE). The research was carried out by analyzing the process of accessing Administration and monitoring, Operational efficiency, Credit granting process and Marketing risk analysis. The descriptive survey method was used for the study qualitative and quantitative approach. Sample size of 30 members of staff was drawn from the development head and Credit department staff. Primary and secondary sources of data were used for the study. Questionnaires were used as the main instrument to collect the primary data. Among the major findings of the study are; credit administration and monitoring process, the study implied that, appropriate Credit administration, measurement and monitoring process are maintained somewhat in line with guideline of developmental bank of Ethiopia. A major recommendation of the study was Hence, improving performance require to institute a strong credit risk management system that can efficiently identify bank able borrowers and a system that can monitor their performance after the loan is granted. The overall credit risk management activity of the bank is needs improvement in devising a strong follow-up unit, devising an office that can control the condition and sanctions at each approval document, establishing coordination among work units.
Increased heat stress reduces future yields of three major crops in Pakistan’s Punjab region despite intensification of irrigation
Creators: name: Becker, Rike
name: Schüth, Christoph
name: Merz, Ralf
name: Khaliq, Tasneem
name: Usman, Muhammad
name: Beek, Tim
name: Kumar, Rohini
name: Schulz, Stephan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 551

description: Climate change and variability threaten the sustainability of future food production, especially in semi-arid regions where water resources are limited and irrigated agriculture is widespread. Increasing temperatures will exacerbate evaporative losses and increase plant water needs. In this regard, higher irrigation intensities have been posited as a solution to mitigate climate change impacts in these regions. Here, using the agro-hydrological model SWAT and the biophysical crop model APSIM, we show that this mitigation measure is oversimplified. We find that heat stress, driven by strong temperature increases, might be the dominating factor in controlling future crop yields and plant water needs. Our analysis encompasses agricultural areas of the Lower Chenab Canal System in Punjab, Pakistan (15,000 km2), which is part of the Indus River irrigation system, the largest irrigation system in the world, covering major cotton, rice and maize cropping zones. Climate models project a strong increase in temperature over the study region of up to 1.8 °C (±0.5 °C) until the mid-century. Both models predict a decline in future crop yields for maize and rice crops, while cotton yields are less effected by rising temperatures and strongly benefit from elevated atmospheric CO2 concentrations. For a high carbon emission scenario, the models simulate yield declines for maize of up to −10% (APSIM) and −19% (SWAT); for rice yields of up to −4% (APSIM) to −26% (SWAT), and for cotton yields of −1% (APSIM) to +11% (SWAT), until 2050, relative to the baseline scenario 1996–2005. Our modeling results further suggest that irrigation demands do not align with increasing temperature trends. Average irrigation demands increase less under higher temperatures. Overall, our study emphasizes the role of elevated heat stress, its effects on agricultural productivity as well as water demand, and its implications for climate change adaption strategies to mitigate adverse impacts in an intensively irrigated region.
The GMRT archive atomic gas survey -- II. Mass modelling and dark matter halo properties across late-type spirals
Creators: name: Biswas, Prerana
name: Kalinova, Veselina
name: Roy, Nirupam
name: Patra, Narendra Nath
name: Tyulneva, Nadezda
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Studying the kinematics and mass modelling of galaxies from HI 21 cm data provides valuable insights into the properties of both the baryonic components and the dark matter halo in nearby galaxies. Despite many observational studies, mass modelling of galaxies remains challenging due to different limitations. For example, most of the previous studies involving mass modelling are based on rotation curves derived from two-dimensional velocity fields from HI or H$α$ spectroscopic observation which are often affected by beam smearing and projection effect. However, kinematic modelling done by fitting the "Tilted ring model" to three-dimensional data cube is not affected by these issues. In this study, we present and compare 3D kinematic modelling of a pilot sample of eleven galaxies from the GMRT archive atomic gas survey (GARCIA) using two different publicly available pipelines. We model the observed HI rotation curve using 3.6 $μ$m infrared data and SDSS r-band data for stellar contribution, HI surface density profile for gas, and Navarro-Frenk-White (NFW) profile for dark matter halo; and employ the Markov Chain Monte Carlo (MCMC) optimization method for parameter estimation. Further, to validate our analysis, we revisit important scaling relations, e.g., the M$_{gas}$-M$_{star}$ relation, M$_{star}$-M$_{halo}$ relation, M$_{gas}$-M$_{halo}$ relation and Baryonic Tully-Fisher relation (BTFR). The scaling relations from our analysis are broadly consistent with that reported in the literature. A larger sample of galaxies from GARCIA in the near future will allow studying these scaling relations in greater details.
description: 16 pages, (9+1) figures. (Accepted for publication in MNRAS)
Plasmon properties and hybridization effects in Silicene
Creators: name: Gomez, C. Vacacela
name: Pisarra, M.
name: Gravina, M.
name: Riccardi, P.
name: Sindona, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The plasmonic character of monolayer silicene is investigated by time-dependent density functional theory in the random phase approximation. The energy-loss function of the system is analyzed, with particular reference to its induced charge-density fluctuations, i.e., plasmon resonances and corresponding dispersions, occurring in the investigated energy-momentum region. At energies larger than 1.5eV, two intrinsic interband modes are detected and characterized. The first one is a hybridized pi-like plasmon, which is assisted by competing one-electron processes involving sp2 and sp3 states. The second one is a more conventional pi-sigma plasmon, which is more intense than the pi-like plasmon and more affected by one-electron processes involving the sigma bands, with respect to the analogous collective oscillation in monolayer graphene. At energies below 1eV, two extrinsic intraband modes are predicted to occur, which are generated by distinct types of Dirac electrons (associated with different Fermi velocities at the so-called Dirac points). The most intense of them is a two-dimensional plasmon, having an energy-momentum dispersion that resembles that of a two-dimensional electron gas. The other is an acoustic plasmon that occurs for specific momentum directions and competes with the two-dimensional plasmon at mid infrared energies. The strong anisotropic character of this mode cannot be explained in terms of the widely used Dirac-cone approximation. As in mono-, bi-, and few-layer graphene, the extrinsic oscillations of silicene are highly sensitive to the concentration of injected or ejected charge carriers. More importantly, the two-dimensional and acoustic plasmons appear to be a signature of the honeycomb lattice, independently of the chemistry of the group-IV elements and the details of the unit-cell geometry.
title: Разработка механизма обеспечения сопоставимости показателей экспортно-импортных операций Российской Федерации
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2022

description: В основу монографии положены материалы научно-исследовательской работы, посвященные разработке механизма обеспечения сопоставимости показателей экспортно-импортных операций Российской Федерации. Проведен статистический анализ изменения структуры внешнеэкономического товарооборота Российской Федерации в разрезе товарных групп и стран-контрагентов, дана оценка уровня расхождения статистических данных внешнеэкономической деятельности между федеральными органами исполнительной власти и организациями, в том числе Минэкономразвития России, Минфином России, ФТС России, Росстатом и Банком России. На основе аналитического обзора выявлены факторы, оказывающие влияние на расхождение данных статистики внешней торговли между федеральными органами исполнительной власти и организациями. Исследованы причины, оказывающие влияние на расхождение статистики внешнеэкономической деятельности Российской Федерации и стран — ключевых торговых партнеров. Разработана методика формирования информационных потоков по объему экспортно-импортных операций Российской Федерации. Монография предназначена для научных работников, докторантов, аспирантов, магистрантов, студентов и руководителей предприятий.
Increased Nonlinear Coupling between Turbulence and Low-Frequency Fluctuations at the L-H Transition
Creators: name: Burin, M. J.
name: Holland, C.
name: Moyer, R. A.
name: Tynan, G. R.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Static and dynamic friction of hierarchical surfaces
Creators: name: Costagliola, Gianluca
name: Bosia, Federico
name: Pugno, Nicola M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hierarchical structures are very common in Nature, but only recently have they been systematically studied in materials physics, in order to understand the specific effects they can have on the mechanical properties of various systems. Structural hierarchy provides a way to tune and optimize macroscopic mechanical properties starting from simple base constituents, and new materials are nowadays designed exploiting this possibility. This can be also true in the field of tribology. In this paper, we study the effect of hierarchical patterned surfaces on the static and dynamic friction coefficients of an elastic material. Our results are obtained by means of numerical simulations using a 1-D spring-block model, which has previously been used to investigate various aspects of friction. Despite the simplicity of the model, we highlight some possible mechanisms that explain how hierarchical structures can significantly modify the friction coefficients of a material, providing a means to achieve tunability.
description: 11 pages, 13 figures
title: Речевые практики: тексты для чтения и самостоятельной работы студентов, изучающих русский язык как иностранный и как неродной
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2022

description: Учебное пособие включает материалы для чтения и анализа с дополнительными заданиями для самостоятельной работы студентов. Тексты знакомят обучающихся с русской культурой и культурой других народов России и мира. Задания направлены как на отработку навыков говорения, так и на лексико-орфографическую работу и отработку правописных умений. Издание предназначено для студентов ТРКИ-1/B1 и ТРКИ1-2/B2 уровней, изучающих русский язык как иностранный, а также для студентов, изучающих русский язык как неродной. Издание представляет интерес для магистрантов, аспирантов и преподавателей РКИ и русского языка как неродного. Может быть использовано как на занятиях, так и во внеаудиторное время.
Ab initio dynamical vertex approximation
Creators: name: Galler, Anna
name: Thunström, Patrik
name: Gunacker, Patrik
name: Tomczak, Jan M.
name: Held, Karsten
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Diagrammatic extensions of dynamical mean field theory (DMFT) such as the dynamical vertex approximation (D$Γ$A) allow us to include non-local correlations beyond DMFT on all length scales and proved their worth for model calculations. Here, we develop and implement an AbinitioD$Γ$A approach for electronic structure calculations of materials. Starting point is the two-particle irreducible vertex in the two particle-hole channels which is approximated by the bare non-local Coulomb interaction and all local vertex corrections. From this we calculate the full non-local vertex and the non-local self-energy through the Bethe-Salpeter equation. The AbinitioD$Γ$A approach naturally generates all local DMFT correlations and all non-local $GW$ contributions, but also further non-local correlations beyond: mixed terms of the former two and non-local spin fluctuations. We apply this new methodology to the prototypical correlated metal SrVO$_3$.
description: 13 pages, 6 figures
Spin dynamics and magnetic interactions of Mn dopants in the topological insulator Bi$_2$Te$_3$
Creators: name: Zimmermann, S.
name: Steckel, F.
name: Hess, C.
name: Ji, H. W.
name: Hor, Y. S.
name: Cava, R. J.
name: Büchner, B.
name: Kataev, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The magnetic and electronic properties of the magnetically doped topological insulator Bi$_{\rm 2-x}$Mn$_{\rm x}$Te$_3$ were studied using electron spin resonance (ESR) and measurements of static magnetization and electrical transport. The investigated high quality single crystals of Bi$_{\rm 2-x}$Mn$_{\rm x}$Te$_3$ show a ferromagnetic phase transition for $x\geq 0.04$ at $T_{C}\approx 12$ K. The Hall measurements reveal a p-type finite charge-carrier density. Measurements of the temperature dependence of the ESR signal of Mn dopants for different orientations of the external magnetic field give evidence that the localized Mn moments interact with the mobile charge carriers leading to a Ruderman-Kittel-Kasuya-Yosida-type ferromagnetic coupling between the Mn spins of order 2-3 meV. Furthermore, ESR reveals a low-dimensional character of magnetic correlations that persist far above the ferromagnetic ordering temperature.
Symbiotic star T CrB as an extreme SU UMa type dwarf nova
Creators: name: Ilkiewicz, Krystian
name: Mikolajewska, Joanna
name: Stoyanov, Kiril A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: T CrB is a symbiotic recurrent nova that exhibits quiescent and active phases between its classical nova eruptions. The statistical properties of these active phases have been poorly studied thus far. Because of that their nature remained unknown. Here we study statistical properties of the active phases and show that they are consistent with outburst and superoutbursts observed in SU UMa type dwarf novae. The recurrence time of these outbursts is consistent with theoretical predictions for similar systems. Moreover, the visual and X-ray evolution of the last active phase is consistent with a superoutburst. This suggests that T CrB is a dwarf nova with an extremely long orbital period, closely related to SU UMa dwarf novae. The similarities between the last superoutburst and the reported activity preceding the 1946 nova eruption may suggest that next classical nova eruption in T CrB could be indeed soon expected.
description: 7 pages, 4 figures, accepted to ApJL
The Effect Of Social Marketing Strategy In Shaping The Buying Behavior Of Addis Ababa University Students: In The Case Of Addis Ababa University School Of Commerce
Creators: name: Yicheneku, Lefkir
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Evidently and at an alarming rate, we are seeing young people engaging in sexual activities at an early age. As a result, they are being exposed to different STD's, unwanted pregnancy, drop outs and discriminated by their parents, peers and society. In order to tackle the problem, it requires a major behavioral change in society especially among the young generation. Thus, social marketing is one of the preferred interventions that is used to reach and mitigate this challenge and benefit society as a whole. Therefore, study was initiated to examine the effect of social marketing strategy in shaping the buying behavior of Addis Ababa university students in Addis Ababa. The study was conducted on 256 regular students that are 1st, 2nd and 3rd year at AAUSC. Descriptive and explanatory study was designed to investigate the relationship between the dependent (Buying behavior) and independent variables (product, place, promotion and price). SPSS 20.0 software package was used to analyze the data obtained. The analysis shows that place the most positive effect on shaping the buying behavior of the students compared to the other independent variables. Following promotion, product and price found to have the same positive significant effect on buying behavior. The result based on the Beta value place has the most significant effect on buying behavior followed by promotion and product while price is the insignificant on from the independent variables. In conclusion, social marketing strategies (Promotion, product, place and price) are effective on the university students on the uptake and use of contraceptive. Which in turn will likely decrease the exposure of STD's and unwanted pregnancy among Addis Ababa university students at school of commerce. Lastly, promoting contraceptives to university students for prevention of STD's and unwanted pregnancy could be a temporary solution but not a permanent one. Concerning bodies should play a major role in working on social marketing interventions on higher education institutions on other preventive methods such as abstinence programs.
Assessment of Employee Retention Mechanisms and the Benefits: the Case of Commercial Bank of Ethiopia.
Creators: name: Zerga, Fekede
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The purpose of this study was to assess employee retention mechanisms and the benefits in Commercial Bank of Ethiopia and assessing employee retention strategies being implementing in CBE, exploring contribution of employee retention for organizational success, assessing employees' satisfaction with the retention strategy of CBE, exploring factors that affect the employee retention strategy, identifying solutions to further improve the retention strategy. A descriptive survey design was used and a purposive sample of two respondent groups was involved. Interview questions conducted for officials and experts of human resource management of Commercial Bank of Ethiopia and questionnaires were filled by employees of CBE. The purpose of the interviewing of the first respondent group was to discover what retention strategies are being practiced at commercial Bank of Ethiopia and its contribution to achieve organizational goals and other related issues as they are responsible for designing and implementing the retention strategies. Questionnaire filled by employees of Commercial Bank of Ethiopia to learn how the retention strategies are designed and implemented, its role in achieving organizational goals and employees satisfaction with the retention strategy. The result shows that there is a well-designed employee retention strategy in Commercial Bank of Ethiopia which made CBE successful in meeting its objectives. More than seventy percent of the participants were satisfied with the overall employee retention strategy of their organization. However, both employees and officials of CBE still believe that there are some retention factors that affect employees on which CBE has to work. Both respondent groups believed that there is a direct relationship between employee retention and organizational success and having effective employee retention strategies is vital for the success of the organization
Delayed Choice, Complementarity, Entanglement and Measurement
Creators: name: Zwirn, Hervé
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is well known that Wheeler proposed several delayed choice experiments in order to show the impossibility to speak of the way a quantum system behaves before being detected. In a double-slit experiment, when do photons decide to travel by one way or by two ways? Delayed choice experiments seem to indicate that, strangely, it is possible to change the decision of the photons until the very last moment before they are detected. This led Wheeler to his famous sentence: No elementary quantum phenomenon is a phenomenon until it is a registered phenomenon, brought to a close by an irreversible act of amplification. Nevertheless some authors wrote that backward in time effects were needed to explain these results. I will show that in delayed choice experiments involving only one particle, a simple explanation is possible without invoking any backward in time effect. Delayed choice experiments involving entangled particles such as the so called quantum eraser can also be explained without invoking any backward in time effect but I will argue that these experiments cannot be accounted for so simply because they rise the whole problem of knowing what a measurement and a collapse are. A previously presented interpretation, Convivial Solipsism, is a natural framework for giving a simple explanation of these delayed choice experiments with entangled particles. In this paper, I show how Convivial Solipsism helps clarifying the puzzling questions raised by the collapse of the wave function of entangled systems.
description: 3 figures
The evolution of the Milky Way's thin disc radial metallicity gradient with K2 asteroseismic ages
Creators: name: Willett, Emma
name: Miglio, Andrea
name: Mackereth, J. Ted
name: Chiappini, Cristina
name: Lyttle, Alexander J.
name: Elsworth, Yvonne
name: Mosser, Benoît
name: Khan, Saniya
name: Anders, Friedrich
name: Casali, Giada
name: Grisoni, Valeria
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The radial metallicity distribution of the Milky Way's disc is an important observational constraint for models of the formation and evolution of our Galaxy. It informs our understanding of the chemical enrichment of the Galactic disc and the dynamical processes therein, particularly radial migration. We investigate how the metallicity changes with guiding radius in the thin disc using a sample of red-giant stars with robust astrometric, spectroscopic and asteroseismic parameters. Our sample contains $668$ stars with guiding radii $4$ kpc < $R_\mathrm{g}$ < $11$ kpc and asteroseismic ages covering the whole history of the thin disc with precision $\approx 25\%$. We use MCMC analysis to measure the gradient and its intrinsic spread in bins of age and construct a hierarchical Bayesian model to investigate the evolution of these parameters independently of the bins. We find a smooth evolution of the gradient from $\approx -0.07$ dex/kpc in the youngest stars to $\approx -0.04$ dex/kpc in stars older than $10$ Gyr, with no break at intermediate ages. Our results are consistent with those based on asteroseismic ages from CoRoT, with that found in Cepheid variables for stars younger than $1$ Gyr, and with open clusters for stars younger than $6$ Gyr. For older stars we find a significantly lower metallicity in our sample than in the clusters, suggesting a survival bias favouring more metal-rich clusters. We also find that the chemical evolution model of Chiappini (2009) is too metal-poor in the early stages of disc formation. Our results provide strong new constraints for the growth and enrichment of the thin disc and radial migration, which will facilitate new tests of model conditions and physics.
description: 15 pages, 16 figures. Accepted for publication in MNRAS
Novel Broken Symmetry Phase from N2O at High Pressures and High Temperatures
Creators: name: Goncharov, Alexander F.
name: Madduri, Achintya
name: McMillan, Paul F.
name: Somayazulu, Maddury
name: Tschauner, Oliver
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
A 3D view of environmental quenching across cosmic time
Creators: name: Amos, Nick
Publisher: name: Lancaster University
Year: 2024
Subjects: Galaxy evolution
Galaxy clusters
Galaxy kinematics
Galaxy quenching
Brightest cluster galaxies

description: The study of galaxy evolution is crucial to our understanding of the Uni-

 verse. It determines how galaxies got from where they started and what

 their likely end will be. Also crucial is our understanding of how
 galaxies

 in denser environments evolve compared to those that are more isolated.

 A large proportion of the galaxies in the Universe are found in galaxy

 clusters and so they form a significant population. Significantly, we see
 at

 the so called cosmic noon that these galaxies begin to change from largely

 star-forming to more quiescent systems. This is true both in the field and

 cluster environment but the significance of the latter on quenching must
 be

 understood.

 In this thesis we investigate star-forming galaxies in clusters at cosmic

 noon using spatially resolved spectroscopy of the gas content in these

 galaxies alongside near-infrared photometry. Using these complimentary

 data we demonstrate that while the cluster environment does not appear to

 impact these galaxies significantly in some ways compared to their field

 counterparts, it may be changing their morphology, which in turn may

 impact their star-formation-rate. We also find that the metallicities of
 these

 cluster galaxies deviate from relationships derived from samples of field

 galaxies, which may indicate the environmental impact of gas exchange

 between the galaxies and their host cluster but more data is needed to

 determine if these conclusions are statistically significant.

 Finally, we report on the serendipitous discovery of a likely Brightest

 Cluster Galaxy caught in the act of formation. Analysis of the kinematics

 of two of the four potential merger components indicates that these are

 likely to merge. Alongside this assessing various combinations of the
 finalgalaxy stellar masses using these four components demonstrate the
 final

 BCG would be well within the mass ranges expected for a BCG at z ∼ 1.4.
Berlin Universities Publishing: Ein kooperativer und wissenschaftsgeführter Open-Access-Verlag
Creators: name: Wiese, Robert
name: Kleineberg, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Open Access
Open Research
Berlin Universities Publishing
Universitätsverlag

description: Präsentation auf dem Workshop "Open-Access-Publizieren durch wissenschaftliche Einrichtungen: Maßnahmen für die Open-Research-Strategie Berlin" organisiert vom Open-Access-Büro Berlin an der Berlin-Brandenburgischen Akademie der Wissenschaften am 4.7.2023.
Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in multilepton final states using 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton collisions at $\sqrt{s} = 13$ TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb$^{-1}$. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in $σ_{t\bar{t}Z} = 0.9 \pm 0.3$ pb and $σ_{t\bar{t}W} = 1.5 \pm 0.8$ pb, in agreement with the Standard Model predictions.
description: 25 pages, plus author list - 42 pages in total, 8 figures, 5 tables. Published in Eur. Phys. J. C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-22/
title: Физическая культура. Теоретический зачет для студентов III курса специальной медицинской группы «Б»
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2022

description: В учебном пособии представлены материалы теоретического зачета V и VI семестров для студентов III курса специальной медицинской группы «Б». Конкретизированы основные требования к зачету III курса по семестрам, критерии оценок. Подготовлено с учетом требований Федерального государственного образовательного стандарта высшего образования. Предназначено для студентов III курса специальной медицинской группы «Б», обучающихся по всем направлениям подготовки бакалавриата, для самостоятельной подготовки к теоретическому зачету по дисциплине «Физическая культура».
title: Основы теории конкурентоспособности
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2021

description: В учебном пособии изложены теоретические, методические и практические аспекты управления конкурентоспособностью объектов различного уровня. Раскрыты сущность и конкуренции и конкурентоспособности; рассмотрены проблемы оценки и прогнозирования конкурентоспособности объектов различного уровня: товара, предприятия, отрасли, страны. Особое внимание уделено методологическим основам формирования системы управления конкурентоспособностью предприятия. Учебное пособие предназначено для студентов, обучающихся по направлению подготовки 38.03.02 «Менеджмент», изучающих дисциплину «Основы теории конкурентоспособности».