cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Сравнительный анализ энергетических характеристик малых синхронных генераторов с электромагнитным и магнитоэлектрическим способом возбуждения
Creators: name: Владимировна, Шевченко Валентина
name: Кирисов Игорь Геннадиевич
Publisher: name: Zenodo
Year: 2006
Subjects: малые синхронные генераторы
электромагнитное возбуждение
магнитоэлектрическое возбуждение

description: Опубликовано: [Шевченко В.В. Кирисов И.Г. Сравнительный анализ энергетических характеристик малых синхронных генераторов с электромагнитным и магнитоэлектрическим способом возбуждения // Тезисы XXXIX научно-практической конференции научно-педагогических работников, ученых, аспирантов и сотрудников академии, 26-27 января 2006 г., часть 2. - Харьков: УИПА, 2006. - С. 95-96. https://doi.org/10.5281/zenodo.2527067]

Описаны преимущества и недостатки синхронных генераторов с возбуждением от постоянных магнитов для промышленного применения.

Ключевые слова: малые синхронные генераторы, электромагнитное возбуждение, магнитоэлектрическое возбуждение.
Broadband nanoelectromechanical phase shifting of light on a chip
Creators: name: Poot, Menno
name: Tang, Hong. X.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate an optomechanical phase shifter. By electrostatically deflecting the nanofabricated mechanical structure, the effective index of a nearby waveguide is changed and the resulting phase shift is measured using an integrated Mach-Zehnder interferometer. Comparing to thermo-optical phase shifters, our device does not consume power in static operation and also it can operate over large frequency, wavelength, and power ranges. Operation in the MHz range and sub-$μ$s pulses are demonstrated.
Scaling properties in the adsorption of ionic polymeric surfactants on generic nanoparticles of metallic oxides by mesoscopic simulation
Creators: name: Mayoral, E.
name: Nahmad-Achar, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the scaling of adsorption isotherms of polyacrylic dispersants on generic surfaces of metallic oxides $XnOm$ as a function of the number of monomeric units, using Electrostatic Dissipative Particle Dynamics simulations. The simulations show how the scaling properties in these systems emerge and how the isotherms rescale to a universal curve, reproducing reported experimental results. The critical exponent for these systems is also obtained, in perfect agreement with the scaling theory of deGennes. Some important applications are mentioned.
description: 10 pages, 6 figures
On the solar orientation of Ales Stenar site
Creators: name: Sparavigna, Amelia Carolina
Publisher: name: Zenodo
Year: 2013
Subjects: Archaeoastronomy

description: Ales Stenar is an ancient stone structure in Sweden. Here we discuss its solar orientation using a freely available software working on the Google Maps.
description: Article published on Scribd, 2013, May 13 . Here the link https://www.scribd.com/document/141191230/On-the-solar-orientation-of-Ales-Stenar-site
Exploring the potential of electropump feed systems for extending high thrust and deep throttle performance for CH4/LOX rocket engines
Creators: name:  SIMONA DANESCU
name:   DAN IFRIM
name:   ALEXANDRU CANCESCU
name:   THEODORA ANDREESCU
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: ELECTROPUMP
CRYOGENIC PUMPS
LIQUID-PROPELLANT
ROCKET ENGINES
LOX
LIQUID METHANE

description: The development of the current European space strategy requires basic research on the key concepts of space propulsion systems that contribute to the development and consolidation of the European space industry. Due to the increasing global demand for reusable and flexible space propulsion concepts, there is a growing trend to replace turbopump systems with electric pump systems. In order to accomplished the European space strategy, the main goal is to develop two compact electric pumps for a 25 kN LOX/CH4 bipropellant engine, in order to apply them on a number of potential applications, from placing payload on Low Earth Orbit to resupplying International Space Station. Electric pump feed system has a high potential for the future, because of their compact size and modular design with lower complexity and higher flexibility, also capable for long operations and unlimited number of restarts without any complications added to the system. This paper is dedicated to evaluate the pumps critical points identification and solution trade-off in order to obtained sustainable overall architecture of the electro-pumps, including all the hydraulic and mechanical components necessary for their operation. In order to achieve this goal, have been evaluated several empirical methods and the preliminary pumps designs were evaluated and optimize using computational fluid dynamics (CFD) methods. Another of the key research topics is to establishment of the testing procedure and methodologies for testing the pumps by similarity with water in order to checking and validating the pumps functionality by measuring the pumps characteristics, fluid parameters and cavitation. This scientific work is based on the project funded by the European Space Agency (ESA) in the frame of the General Studies Technology Programme (GSPT), carried on through a co-engineering partnership with COMOTI, ICPE and ROSEAL, that will bring to the project its expertise in turbomachines design and analysis, in driving motors and sealing system along with expertise of the critical function of the electrically driven pumpfeed LOX/CH 4 cycle rocket engine.
Delineation of Techniques to implement on the enhanced proposed model using data mining for protein sequence classification
Creators: name: Bose, Ananya
name: Saha, Suprativ
Publisher: name: arXiv
Year: 2014
Subjects: subject: Databases (cs.DB)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: In post genomic era with the advent of new technologies a huge amount of complex molecular data are generated with high throughput. The management of this biological data is definitely a challenging task due to complexity and heterogeneity of data for discovering new knowledge. Issues like managing noisy and incomplete data are needed to be dealt with. Use of data mining in biological domain has made its inventory success. Discovering new knowledge from the biological data is a major challenge in data mining technique. The novelty of the proposed model is its combined use of intelligent techniques to classify the protein sequence faster and efficiently. Use of FFT, fuzzy classifier, String weighted algorithm, gram encoding method, neural network model and rough set classifier in a single model and in an appropriate place can enhance the quality of the classification system.Thus the primary challenge is to identify and classify the large protein sequences in a very fast and easy but intellectual way to decrease the time complexity and space complexity.
description: 8 pages, 1 figures
Repeatable and scalable Image Acquisition from Drone equipped with Multispectral and Thermal Sensor for proximal sensing processing of Nature Based Solutions
Creators: name:  FRANCESCO TUFANO
name:   CESARIO VINCENZO ANGELINO
name:   EDOARDO BUCCHIGNANI
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: PROXIMAL SENSING
NBS
MULTISPECTRAL SENSOR

description: Hydro-meteorological hazards, such as floods and storm surges, are responsible for severe socioeconomic disruptions and the risks associated are projected to increase due to the climate changes, whilst traditional measures (e.g., dykes, seawalls) could not be able to cope with the expected intensifications of these events. For this reason, Nature Based Solutions (NBS) are measures encouraged by global summits in order to address environmental problems caused by climate change. The concept of OpenAir Laboratory (OAL) has been recently implemented by the H2020 project OPERANDUM, in order to demonstrate the applicability of the NBS for this kind of hazards. Monitoring of the impacts of OALs is generally done by using a combination of remote sensing at multiple scale and in situ data, including socio-economic variables aimed to acquire new insights on the bio -geophysical processes determining the impacts and vulnerability of NBS. In this work, a repeatable and scalable image acquisition method over an artificial dune built in OAL Italy is presented. The dune is aimed to reduce storm surge and consequent coastal erosion. For this purpose, a suitably equipped drone is used. Multispectral camera and an advanced drone autopilot need. High resolution spatial and temporal image sequences have been acquired in visible (RGB), red edge, near infrared and thermal infrared (L WIR) bands. Image processing allows to evaluate the surface of NBS, vegetation status and terrain temperature: based on these acquisitions, selected indicators have been computed to evaluate the NBS effectiveness e.g. NDVI (Normalized Difference Vegetation Index), GNDVI (Green Normalized Difference Vegetation Index), NIRE (Normalized Index Red Edge) based on the fact that the reflectance changes significantly between stressed and healthy vegetation. A methodology to use these indicators in other NBS of the same type, but with different dimensions and put in different locations is also discussed and analysed.
From bocce to positivity: some probabilistic linear algebra
Creators: name: Morrison, Kent E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60D05, Secondary 60C05

description: A question in geometric probability about the location of the balls in a game of bocce leads to related questions about the probability that a system of linear equations has a positive solution and the probability that a random zero-sum game favors the row player. Under reasonable assumptions we are able to find these probabilities.
description: 14 pages
Ionization rates in the heliosheath and in astrosheaths
Creators: name: Scherer, K.
name: Fichtner, H.
name: Fahr, H. -J.
name: Bzowski, M.
name: Ferreira, S. E. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the heliosphere, especially in the inner heliosheath, mass-, momentum-, and energy loading induced by the ionization of neutral interstellar species plays an important, but for some species, especially Helium, an underestimated role. We discuss the implementation of charge exchange and electron impact processes for interstellar neutral Hydrogen and Helium and their implications for further modeling. Especially, we emphasize the importance of electron impact and a more sophisticated numerical treatment of the charge exchange reactions. Moreover, we discuss the non-resonant charge exchange effects. The rate coefficients are discussed and the influence of the cross-sections in the (M)HD equations for different reactions are revised as well as their representation in the collision integrals. Electron impact is in some regions of the heliosphere, particularly in the heliotail, more effective than charge exchange, and the ionization of neutral interstellar Helium contributes about 40% to the mass- and momentum loading in the inner heliosheath. The charge exchange cross-sections need to be modeled with higher accuracy, especially in view of the latest developments in their description. The ionization of Helium and electron impact ionization of Hydrogen needs to be taken into account for the modeling of the heliosheath and, in general, astrosheaths. Moreover, the charge exchange cross-sections need to be handled in a more sophisticated way, either by developing better analytic approximations or by solving the collision integrals numerically.
description: 18 pages, 9 Figures
Filtering techniques assessment towards pose estimation enhancement for image-based proximity navigation with uncooperative space objects
Creators: name:  GAIA LETIZIA CIVARDI
name:   MICHELE LAVAGNA
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: FILTERING TECHNIQUES
POSE ESTIMATION
VISION-BASED NAVIGATION

description: Autonomous relative navigation nearby uncooperative space objects represents a hot spot within the space engineering community. One common solution to the problem of determining a spacecraft\'s pose is to use vision-based navigation techniques. This paper explores the potential benefits of using filtering methods downstream of a vision-based pose determination pipeline to improve its accuracy. Specifically, we adopt a loosely coupled approach that utilizes two distinct filters; one for relative rotational dynamics and another for translational dynamics. The primary objective of this work is to evaluate the most suitable filtering schemes to complement image processing algorithms. To achieve this, we compare the performance of a traditional Extended Kalman Filter against an Hw filter that leverages the Yamanaka-Ankersen state transition matrix for relative position estimation. In terms of relative attitude estimation, we compare a nonlinear filter and an observer on the Special Orthogonal group with the well-known multiplicative Extended Kalman Filter. Through a simulation study, we assess and compare the different approaches using direct image processing output as measurements for the filters.
Development of a highly stable nickel-foam-based boron monosulfide–graphene electrocatalyst with a high current density for the oxygen evolution reaction
Creators: name: Li, Linghui
name: Watanabe, Norinobu
name: Jiang, Cheng
name: Yamamoto, Akiyasu
name: Fujita, Takeshi
name: Miyakawa, Masashi
name: Taniguchi, Takashi
name: Hosono, Hideo
name: Kondo, Takahiro
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified

description: As an important part of water splitting, the oxygen evolution reaction (OER) requires efficient, low-cost, and stable catalysts to overcome its sluggish kinetic barrier. In this study, based on previously reported OER catalyst materials of boron monosulfide mixed with graphene (r-BS+G), nickel foam (NF) is introduced as a supporting material for an r-BS+G electrocatalyst. The resulting r-BS+G-NF exhibits a very low overpotential at 10 (245 mV), 100 (308 mV), and 500 (405 mV) mA cm–2, with a low Tafel slope (56 mV dec–1). In addition, r-BS+G-NF exhibits high durability and can maintain high activity for more than 100 h at 100 mA cm–2. This is in sharp contrast to the catalyst without graphene (r-BS+NF), which shows lower durability. The results suggest that the unique morphology of the NF provides a large electrochemically active area and exposes more active sites on the surface of the prepared electrocatalyst, while the flexible graphene sheets play an important role as a support for effectively combining r-BS and NF. Consequently, the self-supporting structure can improve the OER performance as well as stability. Therefore, this study provides a promising strategy for use as an efficient and stable OER catalyst at high current densities.
Ultrafast electron dynamics in molecules within density-matrix-based configuration interaction framework
Creators: name: Kochetov, Vladislav
Publisher: name: Universität Rostock
Year: 2023
Subjects: subject: 530 Physics

description: The main goal of this thesis is to present the results of work concerning photon-induced ultrafast spin dynamics being theoretically modeled within the framework of ab-initio calculations. The effect of chemical structure on the ultrafast spin-flip dynamics in core-excited states of transition metal complexes has been studied. Detailed analysis of spin-orbit coupling-driven dynamics in core-excited states, based on the preselection of states and utilizing the Wigner-Eckart theorem, is conducted. A general framework to numerically simulate the ultrafast electron dynamics was developed.
title: Acute cortical necrosis in post-renal transplant: Cortical rim sign on CEUS
Creators: name: Shah, Avinash
Publisher: name: EURORAD
Year: 2023
Subjects: subject: Uroradiology & genital male imaging
subject: Kidney
subject: Urinary Tract / Bladder
subject: Clinical Cases

description: Clinical History: A 21-year-old male patient with post-renal transplant and persistently raised creatinine levels. Patient was biopsy-proven case of renal dysplasia (native kidneys) who developed hypertension and was subsequently on peritoneal dialysis. ABO-incompatible allograft from his mother was obtained, and patient was desensitised with rituximab, IVIG (intravenous immunoglobulins) and plasmapheresis. Subsequently, pre-transplant antibody titre of 1:8 (normal 1:128) was achieved. Intra-operative cold ischemia time was kept as minimum as possible with anastomosis of vessels in 18-20 mins. However, creatitine clearance was not achieved up to satisfaction with persistently raised levels of creatinine in post-operative period.

description: 21 years, male
Photoassociation of long-range $nD$ Rydberg molecules
Creators: name: Anderson, David A.
name: Miller, Stephanie A.
name: Raithel, Georg
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We observe long-range homonuclear diatomic $nD$ Rydberg molecules photoassociated out of an ultracold gas of $^{87}$Rb atoms for 34$\le n \le$40. The measured ground-state binding energies of $^{87}$Rb$(nD-5S_{1/2})$ molecular states are larger than those of their $^{87}$Rb$(nS-5S_{1/2})$ counterparts, showing the dependence of the molecular bond on the angular momentum of the Rydberg atom. We exhibit the transition of $^{87}$Rb$(nD-5S_{1/2})$ molecules from a molecular-binding-dominant regime at low $n$ to a fine-structure-dominant regime at high $n$ [akin to Hund's cases (a) and (c), respectively]. In the analysis the fine structure of the $nD$ Rydberg atom and the hyperfine structure of the $5S_{1/2}$ atom are included.
description: 5 pages, 5 figures
NuSTAR Observations of Heavily Obscured Quasars at z ~ 0.5
Creators: name: Lansbury, G. B.
name: Alexander, D. M.
name: Del Moro, A.
name: Gandhi, P.
name: Assef, R. J.
name: Stern, D.
name: Aird, J.
name: Ballantyne, D. R.
name: Balokovic, M.
name: Bauer, F. E.
name: Boggs, S. E.
name: Brandt, W. N.
name: Christensen, F. E.
name: Craig, W. W.
name: Elvis, M.
name: Grefenstette, B. W.
name: Hailey, C. J.
name: Harrison, F. A.
name: Hickox, R. C.
name: Koss, M.
name: LaMassa, S. M.
name: Luo, B.
name: Mullaney, J. R.
name: Teng, S. H.
name: Urry, C. M.
name: Zhang, W. W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present NuSTAR hard X-ray (3-79 keV) observations of three Type 2 quasars at z ~ 0.4-0.5, optically selected from the Sloan Digital Sky Survey (SDSS). Although the quasars show evidence for being heavily obscured Compton-thick systems on the basis of the 2-10 keV to [OIII] luminosity ratio and multiwavelength diagnostics, their X-ray absorbing column densities (N_H) are poorly known. In this analysis: (1) we study X-ray emission at >10 keV, where X-rays from the central black hole are relatively unabsorbed, in order to better constrain N_H; (2) we further characterize the physical properties of the sources through broad-band near-UV to mid-IR spectral energy distribution (SED) analyses. One of the quasars is detected with NuSTAR at >8 keV with a no-source probability of <0.1%, and its X-ray band ratio suggests near Compton-thick absorption with N_H \gtrsim 5 x 10^23 cm^-2. The other two quasars are undetected, and have low X-ray to mid-IR luminosity ratios in both the low energy (2-10 keV) and high energy (10-40 keV) X-ray regimes that are consistent with extreme, Compton-thick absorption (N_H \gtrsim 10^24 cm^-2). We find that for quasars at z ~ 0.5, NuSTAR provides a significant improvement compared to lower energy (<10 keV) Chandra and XMM-Newton observations alone, as higher column densities can now be directly constrained.
description: 10 pages, 6 figures, 3 tables. Accepted for publication in ApJ
Fat-tailed fluctuations in the size of organizations: the role of social influence
Creators: name: Mondani, Hernan
name: Holme, Petter
name: Liljeros, Fredrik
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Organizational growth processes have consistently been shown to exhibit a fatter-than-Gaussian growth-rate distribution in a variety of settings. Long periods of relatively small changes are interrupted by sudden changes in all size scales. This kind of extreme events can have important consequences for the development of biological and socio-economic systems. Existing models do not derive this aggregated pattern from agent actions at the micro level. We develop an agent-based simulation model on a social network. We take our departure in a model by a Schwarzkopf et al. on a scale-free network. We reproduce the fat-tailed pattern out of internal dynamics alone, and also find that it is robust with respect to network topology. Thus, the social network and the local interactions are a prerequisite for generating the pattern, but not the network topology itself. We further extend the model with a parameter $δ$ that weights the relative fraction of an individual's neighbours belonging to a given organization, representing a contextual aspect of social influence. In the lower limit of this parameter, the fraction is irrelevant and choice of organization is random. In the upper limit of the parameter, the largest fraction quickly dominates, leading to a winner-takes-all situation. We recover the real pattern as an intermediate case between these two extremes.
description: 15 pages, 4 figures
Noether's Theorem with Momentum and Energy Terms for Cresson's Quantum Variational Problems
Creators: name: Frederico, Gastao S. F.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 49K05, 49S05, 81Q05

description: We prove a DuBois-Reymond necessary optimality condition and a Noether symmetry theorem to the recent quantum variational calculus of Cresson. The results are valid for problems of the calculus of variations with functionals defined on sets of nondifferentiable functions. As an application, we obtain a constant of motion for a linear Schrodinger equation.
description: This is a preprint of a paper whose final and definite form will be published in Advances in Dynamical Systems and Applications, ISSN 0973-5321 (see http://campus.mst.edu/adsa). Submitted 15/Mar/2014; Revised 23/Apr/2014; Accepted 12/May/2014
Flash-boiling effect on spray formed by two impinging jets
Creators: name:  LUKASZ JAN KAPUSTA
name:   BARTOSZ KAZMIERSKI
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: SPRAY
INJECTION
ATOMISATION
FLASH BOILING
IMPINGING JETS

description: Although flash boiling has been highly interesting to many researchers, the vast majority of the studies have been limited to free sprays. In contrast, the effect of flash boiling on impinging jets is not yet understood. In this study, we have aimed to fill these knowledge gaps and provide new insight into the global structures of sprays formed by two impinging liquid jets injected under flash-boiling conditions. The results showed that even moderate flash boiling, in which unbroken liquid columns are still present, changes the global structure of the formed spray cloud. The colliding streams are shattered, and the spray is surrounded by the recondensing vapour.
The minimum $b_2$ problem for right-angled Artin groups
Creators: name: Hildum, Alyson
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M05

description: This paper focuses on tools for constructing 4-manifolds that have fundamental group $G$ isomorphic to a right-angled Artin group and that are also minimal, in the sense that they minimize $b_2(M)$, the dimension of $H_2(M;\mathbb{Q})$. For a finitely presented group $G$, define $h(G) = \min\{ b_2(M) | M \in \mathcal M(G) \}$. In this paper, we explore the ways in which we can bound $h(G)$ from below using group cohomology and the tools necessary to build 4-manifolds that realize these lower bounds. We give solutions for right-angled Artin groups, or RAAGs, when the graph associated to $G$ has no 4-cliques, and further we reduce this problem to the case when the graph is connected and contains only 4-cliques. We then give solutions for many infinite families of RAAGs and provide a conjecture to the solution for all RAAGs.
description: 40 pages, 46 figures, appendix containing Sage code
Анализ и выбор способа возбуждения асинхронных генераторов ветроэнергетических установок
Creators: name: Владимировна, Шевченко Валентина
Publisher: name: Zenodo
Year: 2006
Subjects: асинхронные генераторы
ветроэнергетические установки

description: Опубликовано: [Шевченко В.В. Анализ и выбор способа возбуждения асинхронных генераторов ветроэнергетических установок // Тезисы XXXIX научно-практической конференции научно-педагогических работников, ученых, аспирантов и сотрудников академии, 26-27 января 2006 г., часть 2. - Харьков: УИПА, 2006. - С. 94. https://doi.org/10.5281/zenodo.2527093]

Описаны особенности работы асинхронных и синхронных магнитоэлектрических генераторов ветроэнергетических установок и способы их возбуждения.

Ключевые слова: асинхронные генераторы, ветроэнергетические установки.
Nuclear aspects of neutral current non-standard $ν$-nucleus reactions and the role of the exotic $μ^-\to e^{-}$ transitions experimental limits
Creators: name: Papoulias, D. K.
name: Kosmas, T. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The nuclear aspects of flavour changing neutral current (FCNC) processes, predicted by various new-physics models to occur in the presence of nuclei, are examined by computing the relevant nuclear matrix elements within the context of the quasi-particle RPA using realistic strong two-body forces. One of our aims is to explore the role of the non-standard interactions (NSI) in the leptonic sector and specifically: (i) in lepton flavour violating (LFV) processes involving the neutral particles $ν_\ell$ and $\tildeν_\ell$, $\ell = e,μ,τ$ and (ii) in charged lepton flavour violating (cLFV) processes involving the charged leptons $\ell^-$ or $\ell^+$. As concrete nuclear systems we have chosen the stopping targets of $μ^-\rightarrow e^-$ conversion experiments, i.e. the $^{48}\mathrm{Ti}$ nucleus of the PRIME/PRISM experiment at J-PARC and the $^{27}\mathrm{Al}$ of the COMET at J-PARC as well as of the Mu2e at Fermilab. These experiments have been designed to reduce the single event sensitivity down to $10^{-16}$--$10^{-18}$ in searching for charged lepton mixing events. Our goal is, by taking advantage of our detailed nuclear structure calculations and using the present limits or the sensitivity of the aforementioned exotic $μ^- \rightarrow e^-$ experiments, to put stringent constraints on the parameters of NSI Lagrangians.
description: 8 pages, 4 figures, 3 Tables, Physics Letters B accepted
Spectator Effects during Leptogenesis in the Strong Washout Regime
Creators: name: Garbrecht, Bjorn
name: Schwaller, Pedro
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: By including spectator fields into the Boltzmann equations for Leptogenesis, we show that partially equilibrated spectator interactions can have a significant impact on the freeze-out value of the asymmetry in the strong washout regime. The final asymmetry is typically increased, since partially equilibrated spectators "hide" a part of the asymmetry from washout. We study examples with leptonic and non-leptonic spectator processes, assuming thermal initial conditions, and find up to 50% enhanced asymmetries compared to the limit of fully equilibrated spectators. Together with a comprehensive overview of the equilibration temperatures for various Standard Model processes, the numerical results indicate the ranges when the limiting cases of either fully equilibrated or negligible spectator fields are applicable and when they are not. Our findings also indicate an increased sensitivity to initial conditions and finite density corrections even in the strong washout regime.
description: 23 pages, 4 figures
Перспективы использования высокотемпературной сверхпроводимости в энергетике
Creators: name: Владимировна, Шевченко Валентина
name: Литкина М.А.
Publisher: name: Zenodo
Year: 2006
Subjects: высокотемпературная сверхпроводимость

description: Опубликовано: [Шевченко В.В., Литкина М.А. Перспективы использования высокотемпературной сверхпроводимости в энергетике // Тезисы XXXIX научно-практической конференции научно-педагогических работников, ученых, аспирантов и сотрудников академии, 26-27 января 2006 г., часть 2. - Харьков: УИПА, 2006. - С. 95. https://doi.org/10.5281/zenodo.2527112]

Описаны особенности использования металлических и неметаллических высокотемпературных сверхпроводников.

Ключевые слова: высокотемпературная сверхпроводимость.
The higher order regularity Dirichlet problem for elliptic systems in the upper-half space
Creators: name: Martell, José María
name: Mitrea, Dorina
name: Mitrea, Irina
name: Mitrea, Marius
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: Primary: 35B65, 35J45, 35J57, Secondary: 35C15, 74B05, 74G05

description: We identify a large class of constant (complex) coefficient, second order elliptic systems for which the Dirichlet problem in the upper-half space with data in $L^p$-based Sobolev spaces, $1
Experimentelle Analyse des Verschleißverhaltens künstlicher Hüftendoprothesen unter dem Einfluss von Drittkörperpartikeln
Creators: name: Hembus, Jessica
Publisher: name: Universität Rostock
Year: 2022
Subjects: subject: 500 Natural sciences
subject: 610 Medical sciences Medicine
subject: 620 Engineering & allied operations

description: Das Ziel der vorliegenden Arbeit war es, den Einfluss verschiedener Drittkörperpartikel auf Abrieb und Verschleiß von Hüftendoprothesen in standardisierten Abriebsimulator-Untersuchungen zu evaluieren und den Materialtransfer auf explantierten Implantaten zu charakterisieren. Dabei wurde der gesteigerte Verschleiß von Gleitpaarungen im Hüftabriebsimulator unter dem Einfluss verschiedener Drittkörperpartikel deutlich. Es konnte die Entstehung einiger Auftragsmuster geklärt und die Zusammensetzung des Materialauftrages analysiert werden.
STIMONT: A core ontology for multimedia stimuli description
Creators: name: Horvat, Marko
name: Bogunović, Nikola
name: Ćosić, Krešimir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Multimedia (cs.MM)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Affective multimedia documents such as images, sounds or videos elicit emotional responses in exposed human subjects. These stimuli are stored in affective multimedia databases and successfully used for a wide variety of research in psychology and neuroscience in areas related to attention and emotion processing. Although important all affective multimedia databases have numerous deficiencies which impair their applicability. These problems, which are brought forward in the paper, result in low recall and precision of multimedia stimuli retrieval which makes creating emotion elicitation procedures difficult and labor-intensive. To address these issues a new core ontology STIMONT is introduced. The STIMONT is written in OWL-DL formalism and extends W3C EmotionML format with an expressive and formal representation of affective concepts, high-level semantics, stimuli document metadata and the elicited physiology. The advantages of ontology in description of affective multimedia stimuli are demonstrated in a document retrieval experiment and compared against contemporary keyword-based querying methods. Also, a software tool Intelligent Stimulus Generator for retrieval of affective multimedia and construction of stimuli sequences is presented.
description: 27 pages, 13 figures
A liquid reusable strap-on booster system discussion for future European launch vehicles
Creators: name: MORITZ ELLERBECK, KEITH-NOAH JURKE
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: REUSABLE
STRAP-ON
BOOSTER
LAUNCH
VEHICLE

description: A liquid reusable strap-on booster for a future launch-vehicle concept is discussed and benchmarked against an equivalent solid strap-on booster launch vehicle system design. Therefore, a reference vehicle, equipped with solid strap-on boosters, is established to fulfil certain aspects of current European space transportation needs. Those solid boosters are subsequently replaced by a liquid LOX/LCH4 reusable alternative. Both launch vehicle concepts are compared and evaluated from perspective of current RD activities, environmental impacts and future needs.
Magnetic excitations and anomalous spin wave broadening in multiferroic FeV2O4
Creators: name: Zhang, Qiang
name: Ramazanoglu, Mehmet
name: Chi, Songxue
name: Liu, Yong
name: Lograsso, Thomas. A.
name: Vaknin, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report on the different roles of two orbital-active Fe$^{2+}$ at the A site and V$^{3+}$ at the B site in the magnetic excitations and on the anomalous spin wave broadening in FeV$_{2}$O$_{4}$. FeV$_{2}$O$_{4}$ exhibits three structural transitions and successive paramagnetic (PM)-collinear ferrimagnetic (CFI)-noncollinear ferrimagnetic (NCFI) transitions. The high-temperature tetragonal/PM -orthorhombic/CFI transition is accompanied by the appearance of an energy gap with a high magnitude in the magnetic excitations due to strong spin-orbit coupling induced anisotropy at the Fe$^{2+}$ site. While there is no measurable increase in the energy gap from the orbital ordering of V$^{3+}$ at the orthorhombic/CFI-tetragonal/NCFI transition, anomalous spin wave broadening is observed in the orthorhombic/CFI state due to V$^{3+}$ spin fluctuations at the B site. The spin wave broadening is also observed at the zone boundary without softening, which is discussed in terms of magnon-phonon coupling.
description: 4 pages, 3 figures, including one supplemental material
Corrugation, flexibility and wear of fly wings
Creators: name: Wehmann, Henja-Niniane
Publisher: name: Universität Rostock
Year: 2023
Subjects: subject: 500 Natural sciences
subject: 570 Life science
subject: 590 Zoological sciences

description: The properties of insect wings are important for insect flight. This doctoral thesis uses biomechanical and behavioural approaches to quantify properties of wings that affect flight performance. It encompasses investigations into the three-dimensional structure, flexibiltiy and wear of fly wings. The results of this thesis help to further understand the mechanisms and limits of flight force production in insects and thus serve as a valuable basis for further research on insect flight.
Optimized Active Flow Separation Control in the Slat-cut Region Using Low Duty Cycle Pulsed Jets.
Creators: name:  FAYCAL BAHRI
name:   QIANGQIANG SUN
name:   MARK JABBAL
name:   RICHARD JEFFERSON-LOVEDAY
name:   WIT STRYCZNIEWICZ
name:   WIEN STALEWSKI
name:   BRUNO STEFES
name:   ALEXANDER BUESCHER.
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: FLOW SEPARATION
TURBULENT BOUNDARY LAYER CONTROL
PULSED-JETS
AEROFOIL.

description: The design of Ultra High Bypass Ratio (UHBR) engines requires a large leading-edge slat cut-out to maintain clearance between the nacelle and the ground. During the take-off and landing, when the slats are deployed, the maximum lift coefficient is undermined not only by the missing slat and the geometry changes in the cut-out area, but it is also noticeably affected by a local separation observed at the back of the cut-out at high angles of attack. The effect of active flow control (AFC) by pulsed jets on a separated flow developed at high angle of attack of a DLR-FIS wing model is investigated experimentally. A swept wing model of a chord of 0.34 m and length of 3.33 chords, in a landing configuration, is considered. A built-in Pulsed Jet Actuator (PJA) module enables 88 nozzles controlled by solenoid valves embedded in the wing model to control the flow separation. The PJA module is designed to control each valve independently in duty cycle, frequency, and starting time relative to the first valve. Flow visualisation, as well as force measurements and pressure distribution, are conducted to examine the effect of the AFC on the separation developed at a high angle of attack of the wing model. It is shown that the lift coefficient is governed mainly by the dimensionless frequency F + of the pulsing, the pulsing duty cycle DC, and the velocity ratio Vr. The impact of DC and the dimensionless frequency p+ on the lift improvement are examined. Also, it is found that reducing DC and F+ of the pulses are remarkably improving the lift coefficient. In addition, the effect of themomentum coefficient ???? on the stall angle is analysed.
6kN green fuel throttleable development engine Design and Manufacturing
Creators: name:  JAN STURLA HEGRE
name:   ADRIEN BOIRON
name:   JORN-INGE RUUD
name:   ELLIOTT WORSLEY
name:   MATT SHAW
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: BI-PROPELLANT
GREEN
PEROXIDE
PINTLE
ADDITIVE MANUFACTURING

description: Nammo (in Norway and the UK) has been developing a green bi-propellant liquid rocket engine within a GSTP Building Block activity with the European Space Agency (ESA). This development has three main potential applications: Moon lander main engine, an ESA Earth based Moon lander flight demonstrator and an upper stage launcher main engine. The use of green propellants enable the rapid prototyping and development of an engine with advanced features. This paper describes initial engine concepts, the design of the moving pintle injector and regen chamber, the hardware builds, for a breadboard engine design soon to be tested in Q3 2023.
Thermal image generation tool for spacecraft relative navigation in proximity maneouvering phases
Creators: name:  MATTEO QUIRINO
name:   MICHELE LAVAGNA
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: THERMAL IMAGE GENERATION
RADIATIVE HEAT TRANSFER
OPENFOAM
FINITE VOLUME THERMAL MODEL
DIGITAL TERRAIN MODEL

description: On-orbit autonomous relative navigation performance strongly depends on both sensor suite and state reconstruction selection. Whenever that suite relies on image-based sensors working on visible spectral band, the illumination conditions strongly affect the accuracy and robustness of the state reconstruction outputs. To cope with that limitation the ASTRA PoliMi team started investigating the effectiveness of exploiting image sensors active in the IR spectral band, not limited by the lighting conditions. To run effective and comprehensive testing and validation campaigns on navigation algorithms a large dataset of images is requested, either available or easy to settle in the visible band, not trivial and not accessible for the thermal band. The paper presents the full open-source tool under development at PoliMi-ASTRA that exploits an accurate finite volume thermal model of a celestial object and creates thermal images based on the camera dynamic. In particular, a use case of flight proximity with small celestial bodies is discussed. The thermal model relies on open CFD code (OpenFOAM) pushed to catch the finest details of the terrain the temperature field is processed in order to compute the view factors between the camera and each face of the mesh, thus the radiative flux emitted by each face is extracted. Such data feeds the rendering engine (Blender) that together with the camera position and attitude outputs the thermal image. The complete pipeline, fed by orbiting target and the imaging sensor kinematic, outputs a proper synthetic thermal image dataset, exploitable either by a relative navigation block or any other scope of research. Furthermore, in the same framework, the dataset could be used as input for a thermal sensor model providing full customization of the output. The tool performance is critically discussed and applied for two typical proximity scenarios, asteroid and artificial satellite, for both cases challenges and capabilities of the implemented tool for synthetic thermal images are highlighted.
Novel Scalable Infusion Approach, Utilizing Automated Preforming and Smart Mold with Microvibrations for Manufacture of Integral Aerospace Structures
Creators: name:  ZVICKA DEUTSCH
name:   FLORIAN HELBER
name:   HANNAH LINNE
name:   FRIEDRICH DUNGERN
name:   PETER MIDDENDORF
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: COMPOSITE MATERIALS
DRY FIBER PLACEMENT
BINDER MATERIALS
MICROVIBRATIONS
VACUUM INFUSION
INTEGRAL HEATING

description: One of the ongoing paradigm-shifts in manufacture of civilian aerostructures is the gradual departure from classic prepreg-autoclave manufacturing, and the identification of less energy intensive manufacturing routes. To that end, a set of innovative technologies and alternate materials were implemented in a novel unified thermoset composite manufacturing scheme based on Liquid Resin Infusion. The individual technologies involved were -1) Novel automated preforming strategies with dry unidirectional fabrics (IFB), 2) Optimized infusion processes at room temperature, with sustainable polymer resin (IA!), 3) A novel Smart Mold with micro-vibrations for improved fiber wetting and integrated sensors (INVENT). Each technology was developed and matured, independently and in confluence with the others. Finally, a 1700 mm x 700 mm stabilizer panel, with slight curvature and integrated Omega stiffener elements, was manufactured -demonstrating and validating the various technology developments.
Constraints on the CMB Temperature Evolution using Multi-Band Measurements of the Sunyaev Zel'dovich Effect with the South Pole Telescope
Creators: name: Saro, A.
name: Liu, J.
name: Mohr, J. J.
name: Aird, K. A.
name: Ashby, M. L. N.
name: Bayliss, M.
name: Benson, B. A.
name: Bleem, L. E.
name: Bocquet, S.
name: Brodwin, M.
name: Carlstrom, J. E.
name: Chang, C. L.
name: Chiu, I.
name: Cho, H. M.
name: Clocchiatti, A.
name: Crawford, T. M.
name: Crites, A. T.
name: de Haan, T.
name: Desai, S.
name: Dietrich, J. P.
name: Dobbs, M. A.
name: Dolag, K.
name: Dudley, J. P.
name: Foley, R. J.
name: Gangkofner, D.
name: George, E. M.
name: Gladders, M. D.
name: Gonzalez, A. H.
name: Halverson, N. W.
name: Hennig, C.
name: Holzapfel, W. L.
name: Hrubes, J. D.
name: Jones, C.
name: Keisler, R.
name: Lee, A. T.
name: Leitch, E. M.
name: Lueker, M.
name: Luong-Van, D.
name: Mantz, A.
name: Marrone, D. P.
name: McDonald, M.
name: McMahon, J. J.
name: Mehl, J.
name: Meyer, S. S.
name: Mocanu, L.
name: Montroy, T. E.
name: Murray, S. S.
name: Nurgaliev, D.
name: Padin, S.
name: Patej, A.
name: Pryke, C.
name: Reichardt, C. L.
name: Rest, A.
name: Ruel, J.
name: Ruhl, J. E.
name: Saliwanchik, B. R.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Shirokoff, E.
name: Spieler, H. G.
name: Stalder, B.
name: Staniszewski, Z.
name: Stark, A. A.
name: Story, K.
name: van Engelen, A.
name: Vanderlinde, K.
name: Vieira, J. D.
name: Vikhlinin, A.
name: Williamson, R.
name: Zahn, O.
name: Zenteno, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The adiabatic evolution of the temperature of the cosmic microwave background (CMB) is a key prediction of standard cosmology. We study deviations from the expected adiabatic evolution of the CMB temperature of the form $T(z) =T_0(1+z)^{1-α}$ using measurements of the spectrum of the Sunyaev Zel'dovich Effect with the South Pole Telescope (SPT). We present a method for using the ratio of the Sunyaev Zel'dovich signal measured at 95 and 150 GHz in the SPT data to constrain the temperature of the CMB. We demonstrate that this approach provides unbiased results using mock observations of clusters from a new set of hydrodynamical simulations. We apply this method to a sample of 158 SPT-selected clusters, spanning the redshift range $0.05 < z < 1.35$, and measure $α= 0.017^{+0.030}_{-0.028}$, consistent with the standard model prediction of $α=0$. In combination with other published results, we constrain $α= 0.011 \pm 0.016$, an improvement of $\sim 20\%$ over published constraints. This measurement also provides a strong constraint on the effective equation of state in models of decaying dark energy $w_\mathrm{eff} = -0.987^{+0.016}_{-0.017}$.
description: Submitted to MNRAS Letters
Sketchbook 03
Creators: name: Ceska, Oldriska
Publisher: name: University of Victoria Libraries
Year: 2024
Subjects: subject: Plants
valueUri: http://id.worldcat.org/fast/1065823
subject: Biology
valueUri: http://id.worldcat.org/fast/832383
subject: Mushrooms
valueUri: http://id.worldcat.org/fast/1030235
subject: Mushrooms--Identification
valueUri: http://id.worldcat.org/fast/1030238
subject: Botanical illustration
valueUri: http://id.worldcat.org/fast/836840
subject: Botany
valueUri: http://id.worldcat.org/fast/836869
subject: Mushrooms--Research
valueUri: http://id.worldcat.org/fast/1030247
subject: Fungi
valueUri: http://id.worldcat.org/fast/936289
subject: Art
valueUri: http://id.worldcat.org/fast/815177

description: Field journal of mycofloristic (mushroom) surveys with detailed illustrations by Oluna Ceska. Each specimen has been labelled by name, as well as by the location, date, and substrate where it was found. Additional observations include physical characteristics, smell, size, and spore size. The research focuses primarily on the southern Vancouver island region. Many of the studied specimens are from Observatory Hill, Victoria. Additional research locations include the Gulf Islands, Haida Gwaii, the BC mainland, the Yukon, Washington, and Oregon. Locations visited in the journal include: Long Beach, Rainforest Trail, Comber’s Beach, Ucluelet; Elkington property, Duncan; Metchosin Park; Rocky Point; Koksilah Ridge; Royal Roads; Montreul Hill; Mary Hill, Metchosin; Government House; Tod Inlet; Freeman King Park; Salt Spring Island; Discovery Island; Highlands; Wenatchee Forest, WA; Suttle Lake, OR; San Juan Ridge; Coquitlam; Cottle Creek; Nanaimo; Port Renfrew; Rithet’s Bog; Cowichan Lake; Layritz Park; Devonian Park; Albert Head; Heal’s Rifle Range; Matheson Lake; Beacon Hill Park; Incomappleux Valley; East Sooke Park; Mill Hill Park; Thetis Lake Park; SVIMS Show; Observatory Hill; Skirt Mountain; Trout Lake, WA; Mount Adams; Shawinigan Lake.