cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Zur Reaktivität von intramolekular basenstabilisierten Zinn(II)- Verbindungen mit Mercaptanen, Disulfiden und Peroxiden
Creators: name: Tzschach, A.
name: Scheer, Manfred
name: Jurkschat, K.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: Die Umsetzungen von intramolekular basenstabilisierten Zinn(II)-Verbindungen des Typs E(CH2CH2S)2Sn (E = MeN, S) mit Mercaptanen RSH (R = Ph, PhCH2) und Disulfiden RSSR (R = Ph, PhCH2) führen in guten Ausbeuten zu neuen pentakoordinierten Stannaocanen. Neben der Additionsreaktion tritt als Nebenreaktion die Disproportionierung des Hauptproduktes auf, wobei die entstehenden Spiroverbindungen und Zinntetrathiolate mittels der 119Sn-NMR-Spektroskopie nachgewiesen werden konnten. Mit Peroxiden werden ausschließlich Additions-produkte erhalten. Alle neuen Verbindungen werden durch 1H-, 13C- und 119Sn-NMR-Messungen und teilweise durch IR-Untersuchungen charakterisiert.
Orbital Solutions for Two Young, Low-Mass Spectroscopic Binaries in Ophiuchus
Creators: name: Rosero, V.
name: Prato, L.
name: Wasserman, L. H.
name: Rodgers, B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the orbital parameters for ROXR1 14 and RX J1622.7-2325Nw, two young, low-mass, and double-lined spectroscopic binaries recently discovered in the Ophiuchus star forming region. Accurate orbital solutions were determined from over a dozen high-resolution spectra taken with the Keck II and Gemini South telescopes. These objects are T Tauri stars with mass ratios close to unity and periods of ~5 and ~3 days, respectively. In particular, RX J1622.7-2325Nw shows a non-circularized orbit with an eccentricity of 0.30, higher than any other short-period pre-main sequence spectroscopic binary known to date. We speculate that orbit of RX J1622.7-2325Nw has not yet circularized because of the perturbing action of a ~1" companion, itself a close visual pair. A comparison of known young spectroscopic binaries and main sequence (MS) spectroscopic binaries in the eccentricity-period plane shows an indistinguishable distribution of the two populations, implying that orbital circularization occurs in the first 1 Myr of a star's lifetime. With the results presented in this paper we are increasing by ~4% the small sample of PMS spectroscopic binary stars with known orbital elements.
description: Accepted for publication in the AJ; 8 figures. Corrected typos in Table 5
5-Aza(Oxa, Thia)-2,8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane Intramolekular basenstabilisierte Stannylene
Creators: name: Tzschach, A.
name: Scheer, Manfred
name: Jurkschat, K.
name: Zschunke, A.
name: Mügge, C.
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: Durch Umsetzung von Zinn(II)-butoxid mit Mercaptanen des allgemeinen Typs E(CH2CH2SH)2 (E N-t-Bu, NMe, O, S) werden bei Temperaturen bis 50°C die 5-Aza(Oxa, Thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane in hohen Ausbeuten erhalten. Die Verbindungen sind monomer in Lösung. Bei höheren Reaktionstemperaturen (80°C) resultieren dagegen vorzugsweise die Spiroverbindungen des Typs [E(CH2CH2S)2]2Sn (V - VIII). Einige typische Stannylenreaktionen von I - IV mit BF3, Cr(CO)6, Br2 und PhSSPh belegen die hohe Reaktivität der Verbindungen. Ihre Struktur wird durch 1H-, 13C-, 119Sn-NMR, IR- und Mößbauer-Spektren bewiesen.
Can the nuclear symmetry potential at supra-saturation densities be negative?
Creators: name: Yong, Gao-Chan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the framework of an Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, for the central $^{197}$Au+$^{197}$Au reaction at an incident beam energy of 400 MeV/nucleon, effect of nuclear symmetry potential at supra-saturation densities on the pre-equilibrium clusters emission is studied. It is found that for the positive symmetry potential at supra-saturation densities the neutron to proton ratio of lighter clusters with mass number $A\leq3$ ($(n/p)_{A\leq3}$) is larger than that of the weighter clusters with mass number $A>3$ ($(n/p)_{A>3}$), whereas for the negative symmetry potential at supra-saturation densities the $(n/p)_{A\leq3}$ is \emph{smaller} than that of the $(n/p)_{A>3}$. This may be considered as a probe of the negative symmetry potential at supra-saturation densities.
description: 5 pages, 3 figures, 1 table, to be published
Synthesis, spectroscopic investigation and molecular structure of pentacarbonyl-5-t-butyl-5-aza-2,8-dithia-1-stannobicyclo[3.3.01,5]octanechromium(0)
Creators: name: Tzschach, A.
name: Jurkschat, K.
name: Scheer, Manfred
name: Meunier-Piret, J.
name: Meerssche, M. van
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: The compound pentacarbonyl-5-t-butyl-5-aza-2,8-dithia-1-stannobicyclo-[3.3.01,5]octanechromium(0) was prepared in good yield by the reaction of 5-t-butyl-5-aza-2,8-dithia-1-stannobicyclo[3.3.01,5]octane with Cr(CO)6 in THF under UV-irradiation. The crystal and molecular structure was determined from three-dimensional X-ray data. The crystals are monoclinic, space group P21/c. The unit cell, with dimensions a 14.963(9), b 10.026(5), c 13.565(5)Å, β 114.68°(5), contains 4 molecules. The structure was solved by the Patterson-method. The full-matrix refinement with the 2734 independent reflexions gave a final R value of 0.034. The eight-membered ring adopts an asymmetric boat-boat conformation with a tin-nitrogen bond lenght of 2.40 Å; the tin-chromium bond length is 2.62 Å.
Filamin A regulates platelet shape change and contractile force generation via phosphorylation of the myosin light chain
Creators: name: Kim, Hugh
name: Hong, Felix
name: Mollica, Molly Y.
name: Golla, Kalyan
name: De Silva, Enoli
name: Sniadecki, Nathan J.
name: López, José A.
Publisher: name: Portland Press
Year: 2024

description: Platelets are critical mediators of hemostasis and thrombosis. Platelets circulate as discs in their resting form but change shape rapidly upon activation by vascular damage and/or soluble agonists such as thrombin. Platelet shape change is driven by a dynamic remodeling of the actin cytoskeleton. Actin filaments interact with the protein myosin, which is phosphorylated on the myosin light chain (MLC) upon platelet activation. Actin-myosin interactions trigger contraction of the actin cytoskeleton, which drives platelet spreading and contractile force generation. Filamin A (FLNA) is an actin-crosslinking protein that stabilizes the attachment between subcortical actin filaments and the cell membrane. In addition, FLNA binds multiple proteins and serves as a critical intracellular signaling scaffold. Here, we used platelets from mice with a megakaryocyte/platelet-specific deletion of FLNA to investigate the role of FLNA in regulating platelet shape change. Relative to controls, FLNA-null platelets exhibited defects in stress fiber formation, contractile force generation, and MLC phosphorylation in response to thrombin stimulation. Blockade of Rho kinase (ROCK) and protein kinase C (PKC) with the inhibitors Y27632 and bisindolylmaleimide (BIM), respectively, also attenuated MLC phosphorylation; our data further indicate that ROCK and PKC promote MLC phosphorylation through independent pathways. Notably, the activity of both ROCK and PKC was diminished in the FLNA-deficient platelets. We conclude that FLNA regulates thrombin-induced MLC phosphorylation and platelet contraction, in a ROCK- and PKC-dependent manner.
The Bolocam Galactic Plane Survey IV: 1.1 and 0.35 mm Dust Continuum Emission in the Galactic Center Region
Creators: name: Bally, John
name: Aguirre, James
name: Battersby, Cara
name: Bradley, Eric Todd
name: Cyganowski, Claudia
name: Dowell, Darren
name: Drosback, Meredith
name: Dunham, Miranda K
name: Evans, Neal J.
name: Ginsburg, Adam
name: Glenn, Jason
name: Harvey, Paul
name: Mills, Elisabeth
name: Merello, Manuel
name: Rosolowsky, Erik
name: Schlingman, Wayne
name: Shirley, Yancy L.
name: Stringfellow, Guy S.
name: Walawender, Josh
name: Williams, Jonathan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Bolocam Galactic Plane Survey (BGPS) data for a six square degree region of the Galactic plane containing the Galactic center is analyzed and compared to infrared and radio continuum data. The BGPS 1.1 mm emission consists of clumps interconnected by a network of fainter filaments surrounding cavities, a few of which are filled with diffuse near-IR emission indicating the presence of warm dust or with radio continuum characteristic of HII regions or supernova remnants. New 350 μm images of the environments of the two brightest regions, Sgr A and B, are presented. Sgr B2 is the brightest mm-emitting clump in the Central Molecular Zone and may be forming the closest analog to a super star cluster in the Galaxy. The Central Molecular Zone (CMZ) contains the highest concentration of mm and sub-mm emitting dense clumps in the Galaxy. Most 1.1 mm features at positive longitudes are seen in silhouette against the 3.6 to 24 μm background observed by the Spitzer Space Telescope. However, only a few clumps at negative longitudes are seen in absorption, confirming the hypothesis that positive longitude clumps in the CMZ tend to be on the near-side of the Galactic center, consistent with the suspected orientation of the central bar in our Galaxy. Some 1.1 mm cloud surfaces are seen in emission at 8 μm, presumably due to polycyclic aromatic hydrocarbons (PAHs). A ~0.2\degree (~30 pc) diameter cavity and infrared bubble between l \approx 0.0\degree and 0.2\degree surrounds the Arches and Quintuplet clusters and Sgr A. The bubble contains several clumpy dust filaments that point toward Sgr A\ast; its potential role in their formation is explored. [abstract truncated]
description: 76 pages, 22 figures, published in ApJ: http://iopscience.iop.org/0004-637X/721/1/137/
Estimation of the XUV radiation onto close planets and their evaporation
Creators: name: Sanz-Forcada, J.
name: Micela, G.
name: Ribas, I.
name: Pollock, A. M. T.
name: Eiroa, C.
name: Velasco, A.
name: Solano, E.
name: Garcia-Alvarez, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: The current distribution of planet mass vs. incident stellar X-ray flux supports the idea that photoevaporation of the atmosphere may take place in close-in planets. Integrated effects have to be accounted for. A proper calculation of the mass loss rate due to photoevaporation requires to estimate the total irradiation from the whole XUV range. Aims: The purpose of this paper is to extend the analysis of the photoevaporation in planetary atmospheres from the accessible X-rays to the mostly unobserved EUV range by using the coronal models of stars to calculate the EUV contribution to the stellar spectra. The mass evolution of planets can be traced assuming that thermal losses dominate the mass loss of their atmospheres. Methods: We determine coronal models for 82 stars with exoplanets that have X-ray observations available. Then a synthetic spectrum is produced for the whole XUV range (~1-912 Å). The determination of the EUV stellar flux, calibrated with real EUV data, allows us to calculate the accumulated effects of the XUV irradiation on the planet atmosphere with time, as well as the mass evolution for planets with known density. Results: We calibrate for the first time a relation of the EUV luminosity with stellar age valid for late-type stars. In a sample of 109 exoplanets, few planets with masses larger than ~1.5 Mj receive high XUV flux, suggesting that intense photoevaporation takes place in a short period of time, as previously found in X-rays. The scenario is also consistent with the observed distribution of planet masses with density. The accumulated effects of photoevaporation over time indicate that HD 209458b may have lost 0.2 Mj since an age of 20 Myr. Conclusions: Coronal radiation produces rapid photoevaporation of the atmospheres of planets close to young late-type stars. More complex models are needed to explain fully the observations.
description: Accepted by A&A. 10 pages, 8 figures, 7 Tables (2 online). Additional online material includes 7 pages, 6 figures and 6 tables, all included
Level ice forces on hydraulic structures during ice season
Creators: name: Politko, Valentin
name: Kantardgi, Izmail
Publisher: name: Санкт-Петербургский политехнический университет Петра Великого
Year: 2018
Subjects: subject: ice loading
subject: ice loading scenarios
subject: drifting level ice
subject: level ice parameters
subject: numerical ice model
subject: ледовая нагрузка
subject: ледовые сценарии
subject: дрейфующий лед
subject: исходные ледовые параметры
subject: численная модель льда

description: The current study investigated the variability of the main parameters of drifting level ice during ice season and how this variability affects the ice load. The study was carried out on the example of hydraulic protective structures of the floating nuclear thermal power plant in the city of Pevek. Numerical modeling was performed to determine the ice load reduction factor for the case when the vertical wall is formed by the consolidated ice fragments on an inclined structure. Statistical information on the main ice parameters was gathered and provided in the article. Ice loading calculations were conducted by several calculation methods. Based on the results of the study, general conclusions were made on the specifics of ice loading alternation during ice season and conclusions regarding design ice loading on hydraulic structures in the port of Pevek.
Evaluation of socio-economic contributions from the primary forestry sector using material flow analyses
Creators: name: Li, Yu
Publisher: name: University of British Columbia
Year: 2017

description: The competitiveness of the global primary forest products industry has been declining consistently compared with many other industrial sectors. This dissertation’s goal was to evaluate the performance of primary forestry sector in Canada and use wood utilization and allocation as means to improve the sector’s socio-economic outcomes. To achieve this goal, material flow analyses was used as the fundamental methodology to quantify a series of unit input employment and value added indicators to characterize the forestry sector value chains and evaluate socio-economic contributions. The substantial increase in the international trade of forest products required that trade data should be accounted for when quantifying socio-economic outcomes from national forestry sectors. A parameter termed the Apparent Industrial Input (AII) was developed to measure the wood fibre input at various stages of national primary value chains accounting for the international trade of various forest products. Normalized value added, GDP and employment indicators based on these trade-adjusted fibre inputs were employed to evaluate the comparative performance of Canada and fourteen other countries’ forestry sectors at various stages of the value chain. A primary forestry sector maturation pattern was observed as a nation’s commercial forestry sector developed. Nations that created more value per fibre input generally possessed a proportionately smaller forestry and logging subsector and a larger manufacturing subsector. A comparative study between Canada and United States of America (USA) showed that Canada historically had a larger proportional forestry and logging value added and a smaller proportional manufacturing subsector value added than the USA. It was inferred that Canada would achieve lower economic outcomes per input. Material flow analyses were completed for British Columbia’s (BC) primary forestry value chain and an integrated forestry company in BC. Both studies revealed the importance of by-products’ role in linking the wood products manufacturing and pulp and paper manufacturing subsectors. Two optimized scenarios revealed that by reallocating fibre flows, value added per unit of input for BC’s primary forestry sector could be increased by up to 35.4% compared to the base case. The enterprise level study also showed that material flow adjustment could increase the unit input value added.
Adhesive dry mix using an amorphous aluminosilicates
Creators: name: Zhegera, Kristina
name: Pyshkina, Irina
name: Martyashin, Georgiy
Publisher: name: Санкт-Петербургский политехнический университет Петра Великого
Year: 2018
Subjects: subject: construction
subject: building materials
subject: cement
subject: dry mix
subject: amorphous aluminosilicates
subject: bond strength
subject: shear strength
subject: строительство
subject: строительные материалы
subject: цемент
subject: сухая строительная смесь
subject: аморфные алюмосиликаты
subject: прочность сцепления
subject: прочность сцепления при сдвиге

description: In the paper, it is proposed to use synthesized amorphous aluminosilicates as a modifying supplement in cement adhesive dry mixes. The results of the analysis of the chemical composition and microstructure of the developed supplement based on amorphous aluminosilicates used as a modifying supplement in the recipe of adhesive dry mixes are given. A method for evaluating the shear strength of a solution layer using the device GT 2.2.3 is proposed. The methods of testing and instrumentation for evaluating the bond strength of the solution layer are described. In the paper, the bond strength of the developed composition of tile adhesive based on cement with substrates made of gypsum, polystyrene foam (with reinforcing mesh) and foam concrete was evaluated. The results of the evaluation of the shear strength of a solution adhesive layer based on the developed recipe and the prototype relative to the substrate obtained using the developed method and the device GT 2.2.3 are presented. The obtained results were compared with the values of DIN EN 12004. It is established that the adhesive joint based on the developed recipe of the adhesive dry mix is resistant to peeling.
Constructive-technological decisions in regulating the flow of atmospheric precipitation
Creators: name: Degtyareva, Olga
name: Degtyarev, Georgy
name: Lavrov, Nikolai
name: Aliev, Djouhar
Publisher: name: Санкт-Петербургский политехнический университет Петра Великого
Year: 2018
Subjects: subject: flow regulation
subject: above-ground reservoir
subject: underground reservoir
subject: bearing capacity
subject: регулирование стока
subject: надземное водохранилище
subject: подземное водохранилище
subject: несущая способность

description: Practically all sources of fresh water suitable for agriculture, water supply to the population and vacationists, as well as for industrial development on the Black Sea coast of the Caucasus either have completely exhausted themselves or are on the verge of their possibilities. Further development of the region is directly related to the resolution of this problem. The solution of the problem is possible when the system for regulating precipitation flow is implemented. The proposed system includes small reservoirs located in canyons of mountain gorges. Moreover, it is proposed to create in the gorge both above-ground and underground reservoirs for accumulation of surface and underground flow. Complex hydro-geological conditions of construction, seismicity of the zone, suggest the construction of lightweight buttress dams in the structure of hydrosystems, when the pile foundation directly perceives horizontal shear forces. Complex formulation of the issue required the use of mathematical modeling of the situation on the basis of 3D production, with the analysis of the stress-strain state of the "foundation-dam" system. Dynamic analysis (calculation of eigenvalues) and analysis of seismic impact on the dam are carried out. The carrying capacity of the buttress dam was estimated and the degree of reinforcement was determined, as a result of which it was established that the proposed construction complies with regulatory requirements. Design solutions for the system of regulation of precipitation flow were introduced in production in 2016 in the suburbs of the resort town of Gelendzhik. Successful operation of the system confirms the correctness of theoretical and technological prerequisites and opens up new opportunities in the intensive development of the Black Sea coast of the Caucasus. The proposed system for regulating atmospheric runoff can find application in other regions of the mountain-foothill zone, for example, in the countries of Central Asia.
Different Transformation Pathways in the Photolysis of [Cp*P{W(CO)5}2]
Creators: name: Schiffer, Michael
name: Leiner, Eva
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: Photolysis; Cyclopentadienyl ligands; Tungsten; P ligands
subject: 540 Chemie

description: Photolysis of [Cp*P{W(CO)5}2] (1) leads to the novel complex [{Cp*(CO)6W2}(µ-H)(-1:1:1-P2){W(CO)5}2] (4), which was structurally and spectroscopically characterised. The product is formed by a Cp* migration within 1 to give the phosphido complex intermediate [Cp*(CO)2WPW(CO)5], as well as by a Cp* elimination to form an intermediate of the type [P{W(CO)5}2], both of which dimerise to yield product 4.
Inelastic cotunneling in quantum dots and molecules with weakly broken degeneracies
Creators: name: Begemann, Georg
name: Koller, Sonja
name: Grifoni, Milena
name: Paaske, Jens
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik
subject: 85.35.Be
subject: 73.63.Kv

description: We calculate the nonlinear cotunneling conductance through interacting quantum-dot systems in the deep Coulomb blockade regime using a rate equation approach based on the T-matrix formalism, which shows in the concerned regions very good agreement with a generalized master equation approach. Our focus is on inelastic cotunneling in systems with weakly broken degeneracies, such as complex quantum dots or molecules. We find for these systems a characteristic gate dependence of the nonequilibrium cotunneling conductance. While on one side of a Coulomb diamond the conductance decreases after the inelastic cotunneling threshold toward its saturation value, on the other side it increases monotonously even after the threshold. We show that this behavior originates from an asymmetric gate voltage dependence of the effective cotunneling amplitudes.
Features of the Refined Gribov-Zwanziger theory: propagators, BRST soft symmetry breaking and glueball masses
Creators: name: Sorella, Silvio P.
name: Dudal, David
name: Guimaraes, Marcelo S.
name: Vandersickel, Nele
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The present work discusses an approach to access the physical spectrum of the Yang-Mills theory quantized in the Landau gauge. By using recent lattice data on the gluon propagator, it is possible to study the two-point functions of gauge invariant composite operators, from which masses of glueballs can be extracted. It turns out that the momentum dependence of the gluon propagator is very well reproduced by the corresponding tree-level gluon propagator obtained from the Refined Gribov-Zwanziger theory, which takes into account the presence of the Gribov horizon as well as the effect of condensates of mass dimension two. The resulting glueball masses are in good agreement with the available lattice data
description: Contribution to the proceedings of the conference "The many faces of QCD", November 1-5, 2010, Ghent, Belgium, 9 pages
Zur Reaktivität von intramolekular basenstabilisierten Zinn(II)-Verbindungen mit Halogenen, Zinntetrachlorid und Chloroform
Creators: name: Tzschach, A.
name: Scheer, Manfred
name: Jurkschat, K.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: Intramolekular basenstabilisierte Zinn(II)-Verbindungen des Typs RN(CH2CH2Y)2Sn (Y = O, S und R = Me, t-Bu) reagieren bei Raumtemperatur mit Halogenen, Zinntetrachlorid und Chloroform im Sinne von oxydativen Additionsreaktionen zu Zinn(IV)-Derivaten. Diese Derivate werden durch NMR-Untersuchungen und durch Mößbauerstudien charakterisiert.
Internalization of interleukin 1 (IL 1) correlates with IL 1-induced IL 2 receptor expression and IL 2 secretion of EL4 thymoma cells
Creators: name: von Hoegen, I.
name: Falk, Werner
name: Kojouharoff, G.
name: Krammer, P. H.
Publisher: name: Universität Regensburg
Year: 1989
Subjects: subject: 610 Medizin
subject: Animals
subject: Cell Line
subject: Clone Cells/metabolism
subject: Cross-Linking Reagents
subject: Interleukin-1/physiology
subject: Interleukin-2/metabolism
subject: Iodine Radioisotopes
subject: Mice
subject: RNA, Messenger/biosynthesis
subject: Receptors, Immunologic/analysis
subject: Receptors, Interleukin-1
subject: Receptors, Interleukin-2/biosynthesis
subject: Thymoma/secretion
subject: Thymus Neoplasms/secretion

description: The cytokine interleukin 1 (IL 1) plays an important role in the induction of IL 2 secretion and high-affinity IL 2 receptor (IL 2R) expression by T cells. The events that follow binding of IL 1 to IL 1R, however, are still unknown. In this study we describe two variants of the murine thymoma EL4 (5D3 and D6/76) that express comparable numbers of cell surface IL 1 receptors and bind IL 1 with the same affinity, but show distinct IL 1-dependent IL 2 secretion and IL 2R expression. In the presence of the tumor promoter phorbol 12-myristate 13-acetate IL 1 augments IL 2 secretion and IL 2R expression of EL4 5D3 but not of EL4 D6/76 cells. Comparison of the internalization of IL 1 by both clones revealed that EL4 D6/76 was unable to transport cell surface-bound IL 1 to the cytoplasm. These findings suggest that internalization of receptor-bound IL 1 is required for the action of this cytokine.
Response solutions for arbitrary quasi-periodic perturbations with Bryuno frequency vector
Creators: name: Corsi, Livia
name: Gentile, Guido
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58F27, 37J20, 37J40

description: We study the problem of existence of response solutions for a real-analytic one-dimensional system, consisting of a rotator subjected to a small quasi-periodic forcing. We prove that at least one response solution always exists, without any assumption on the forcing besides smallness and analyticity. This strengthens the results available in the literature, where generic non-degeneracy conditions are assumed. The proof is based on a diagrammatic formalism and relies on renormalisation group techniques, which exploit the formal analogy with problems of quantum field theory; a crucial role is played by remarkable identities between classes of diagrams.
description: 30 pages, 12 figures
Critical behavior of three-dimensional Ising spin-glass model
Creators: name: Morgenstern, Ingo
name: Ogielski, Andrew T.
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 530 Physik
subject: 75.10.Hk, 05.50.+q

description: First results of massive Monte Carlo simulations of the d=3 Ising spin-glass with ±J bond distribution, performed on a fast special purpose computer, are presented. A qualitative change in the behavior of the system and best fits for the spin-glass correlation length and relaxation time favor equilibrium phase transition at Tc/J≊1.2. .AE
Reactions of [Fe3(µ3-Q)(CO)9]2–(Q = Se, Te) with organic and organometallic dihalides of group 15 elements – an approach to functionalised clusters
Creators: name: Konchenko, Sergei N.
name: Pushkarevsky, Nikolai A.
name: Virovets, Alexander V.
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 540 Chemie

description: A number of novel nido-clusters of the type [Fe3(µ3-SbR)(µ3-Q)(CO)9] containing the heavier group 16 elements (Q = Se, Te) and Sb as group 15 element with attached functional groups (R = Cp*, (5-C5H4tBu)Fe(CO)2) have been obtained by the reaction of K2[Fe3(µ3-Q)(CO)9](Q = Se, Te) with RSbX2(X = Br, I). Furthermore, a first cluster [Fe3(µ3-BiFe(CO)2(5-C5H4tBu))(µ3-Se)(CO)9] containing a Bi/Se combination has also been synthesised in a similar manner. The novel complexes were comprehensively characterised by various spectroscopic methods as well as by single crystal X-ray diffraction methods.
The structure of 5-aza-2,8-dioxa-1-stanna(II)bicyclo[3.3.0]octane
Creators: name: Zschunke, A.
name: Mügge, C.
name: Scheer, Manfred
name: Jurkschat, K.
name: Tzschach, A.
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: From the1H,13C, and119Sn NMR spectra at different temperatures, it is concluded that the 5-alkyl-5-aza-2,8-dioxa-1-stanna(II)bicyclo[3.3.0]octanes dimerize in nonpolar solvents. The barrier for dimerization is lower (G =40 kJ/mol) than the barrier for simultaneous dissociation-inversion (G =70 kJ/mol). The dimers studied are sterically uniform.
Controlling the nuclear polarization in quantum dots using optical pulses with a modest bandwidth
Creators: name: Carter, S. G.
name: Economou, Sophia E.
name: Shabaev, A.
name: Bracker, A. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that detuned optical pulse trains with a modest spectral width can polarize nuclear spins in InAs quantum dots. The pulse bandwidth is large enough to excite a coherent superposition of both electron spin eigenstates in these negatively charged dots but narrow enough to give partial spectral selectivity between the eigenstates. The coherent precession of electron spin states and periodic excitation focuses the nuclear spin distribution, producing a discrete set of precession modes. The spectral selectivity generates a net nuclear polarization, through a mechanism that relies on optical spin rotations rather than electron spin relaxation.
description: 7 pages, 7 figures
Sources of Nonlinearity in Phase Noise of MUTC Photodetectors at Comb-Line Frequencies
Creators: name: Anjum, Ishraq
name: Simsek, Ergun
name: Mahabadi, Seyed Ehsan Jamali
name: Carruthers, Thomas F.
name: Menyuk, Curtis
Publisher: name: Maryland Shared Open Access Repository
Year: 2024
Subjects: UMBC Optical Fiber Communications Laboratory

description: We calculate the phase noise of two high current modified uni-traveling carrier (MUTC) photodetectors at the first 100 comb-line frequencies. We observe a non-monotonic increase of phase noise. We investigate the underlying physics. Insights gained inform MUTC photodetector design and optimization for frequency-comb applications.
Face Registration and Student’s Class Attending Monitoring System using Image Processing with Library Face Recognition
Creators: name: Aekkarat Suksukont
Publisher: name: The Association of Council of IT Deans (CITT)
Year: 2021
Subjects: Image processing
Face detection
Face recognition
Computer vision
Local Binary Pattern Histograms

description: Journal of Information Science and Technology, 11, 2, 21-28
6-(N-Methyl)aza-2,10-dithia-1-stanna(II)-bicyclo[4,4,01,6]decan - ein Zehnring mit transannularer Zinn-Stickstoff-Wechselwirkung
Creators: name: Tzschach, A.
name: Jurkschat, K.
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: Durch Umsetzung von Zinn(II)-butoxid mit N-Methyl-bis(-mercaptopropyl)amin in Toluen wird die Titelverbindung in guter Ausbeute erhalten. Ihre Struktur wird 1H-, 13C- und 119Sn-NMR-spektroskopisch und massenspektrometrisch aufgeklärt.
Permutation Orbifold of N=2 Supersymmetric Minimal Models
Creators: name: Maio, M.
name: Schellekens, A. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we apply the previously derived formalism of permutation orbifold conformal field theories to N=2 supersymmetric minimal models. By interchanging extensions and permutations of the factors we find a very interesting structure relating various conformal field theories that seems not to be known in literature. Moreover, unexpected exceptional simple currents arise in the extended permuted models, coming from off-diagonal fields. In a few situations they admit fixed points that must be resolved. We determine the complete CFT data with all fixed point resolution matrices for all simple currents of all Z_2-permutations orbifolds of all minimal N=2 models with k\neq 2 mod 4.
description: 48 pages
MPEC 2023-X147 : 2023 XF4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 XF4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The Accuracy Comparison of Time Series Classification in Vector Space between SAX and BOSS Methods: A Case Study of Electrocardiogram
Creators: name: Napatsorn Kaewkla
Publisher: name: The Association of Council of IT Deans (CITT)
Year: 2021
Subjects: Time Series Classification
SAX
BOSS
Vector Space
Electrocardiogram

description: Journal of Information Science and Technology, 11, 2, 49-61
Chemical composition of the old globular clusters NGC 1786, NGC 2210 and NGC 2257 in the Large Magellanic Cloud
Creators: name: Mucciarelli, A.
name: Origlia, L.
name: Ferraro, F. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper presents the chemical abundance analysis of a sample of 18 giant stars in 3 old globular clusters in the Large Magellanic Cloud, namely NGC 1786, NGC 2210 and NGC 2257. The derived iron content is [Fe/H]= --1.75+-0.01 dex (sigma= 0.02 dex), --1.65+-0.02 dex (sigma= 0.04 dex) and --1.95+-0.02 dex (sigma= 0.04 dex) for NGC 1786, NGC 2210 and NGC 2257, respectively. All the clusters exhibit similar abundance ratios, with enhanced values (+0.30 dex) of [alpha/Fe], consistent with the Galactic Halo stars, thus indicating that these clusters have formed from a gas enriched by Type II SNe. We also found evidence that r-process are the main channel of production of the measured neutron capture elements (Y, Ba, La, Nd, Ce and Eu). In particular the quite large enhancement of [Eu/Fe] (+0.70 dex) found in these old clusters clearly indicates a relevant efficiency of the r-process mechanism in the LMC environment.
description: Accepted for pbblication in ApJ
Spin edge helices in a perpendicular magnetic field
Creators: name: Badalyan, Samvel
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik
subject: 72.25.-b, 72.15. Gd, 85.75.-d

description: We present an exact solution to the problem of the spin edge states in the presence of equal Bychkov-Rashba and Dresselhaus spin-orbit fields in a two-dimensional electron system, restricted by a hard-wall confining potential and exposed to a perpendicular magnetic field. We find that the spectrum of the spin edge states depends critically on the orientation of the sample edges with respect to the crystallographic axes. Such a strikingly different spectral behavior generates new modes of the persistent spin helix—spin edge helices with novel properties, which can be tuned by the applied electric and magnetic fields.
Low-Cost Water Filtration System
Creators: name: Adams, Jabin
name: Kisner, Zane
Publisher: name: Unknown
Year: 2023
Subjects: subject: Water
subject: Filters and filtration
subject: Water
subject: Potable Water
subject: Contanimated
subject: Deaths
subject: Rural Areas
subject: Heavy Metals

description: Water is essential to all life on Earth. Humans use water every day for drinking, bathing, cleaning, and in many other different ways. However, only 2.5% of the total water on Earth is considered fresh potable water, but only 0.775% of this water is accessible to humans (Misachi). Contaminated water sources are responsible for 1.2 million deaths per year. These contaminants can be anything from bacteria to heavy metals or even radioactive materials. This report will explain how the team plans to help mitigate the issues presented with access to clean water. This product will be able to supply potable water to rural areas that are not connected to municipality utilities, and this product also has the capacity to be used globally in the future.
FEER Coefficient of Emission (Cₑ) Product User Manual
Creators: name: Ellison, Luke
name: Ichoku, Charles
Publisher: name: Maryland Shared Open Access Repository
Year: 2015

description: The relatively new ability to measure radiant energy on a global scale with the use of powerful sensors aboard earth-observing satellites is revolutionizing the science of fire research. The advent of mid-infrared (MIR) narrowband channels on these orbital platforms has brought about the ability to quantitatively characterize fire on a global basis and for an extended period of time. By putting this unprecedented satellite capability to advantageous use, new emissions inventories based on remotely sensed fire data have continued to be created ever since it was established that there is a linear relationship between biomass consumed and emissions output (e.g. Seiler and Crutzen 1980). However, most of the initial satellite-derived inventories were based on the qualitative use of fire detects to estimate emissions. New inventories that are based on the quantitative use of fire radiative power (FRP) measurements are now being developed, although they use the common bottom-up methodologies that by their very nature are complex and prone to compounding uncertainties. The Fire Energetics and Emissions Research (FEER) coefficient of emission (Cₑ) version 1.0 dataset is the first global gridded product in the family of ‘emission factors,’ that is based essentially on satellite measurements, and requires only direct satellite FRP measurements of an actively burning fire anywhere to evaluate its emission rate in near real time, which is essential for operational activities, such as the monitoring and forecasting of smoke emission impacts on air quality (Ichoku and Kaufman 2005; Ichoku and Ellison 2014). Therefore, the FEER Cₑ product is a revolutionary idea and product. This FEER Cₑ product user manual is provided to help the user in understanding the FEER Cₑ product and guide the user in extracting and using the data.
Factors Affecting Elderly's Intention to use Financial Services Application During the COVID-19 Pandemic
Creators: name: Pakjira Sukassathit
Publisher: name: The Association of Council of IT Deans (CITT)
Year: 2021
Subjects: Financial Service Application
Elderly Adults
Technology Acceptance Model
Diffusion of innovation theory
COVID-19

description: Journal of Information Science and Technology, 11, 2, 62-71
Properties of odd nuclei and the impact of time-odd mean fields: A systematic Skyrme-Hartree-Fock analysis
Creators: name: Pototzky, K. J.
name: Erler, J.
name: Reinhard, P. -G.
name: Nesterenko, V. O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a systematic analysis of the description of odd nuclei by the Skyrme-Hartree-Fock approach augmented with pairing in BCS approximation and blocking of the odd nucleon. Current and spin densities in the Skyrme functional produce time-odd mean fields (TOMF) for odd nuclei. Their effect on basic properties (binding energies, odd-even staggering, separation energies and spectra) is investigated for the three Skyrme parameterizations SkI3, SLy6, and SV-bas. About 1300 spherical and axially-deformed odd nuclei with 16 < Z < 92 are considered. The calculations demonstrate that the TOMF effect is generally small, although not fully negligible. The influence of the Skyrme parameterization and the consistency of the calculations are much more important. With a proper choice of the parameterization, a good description of binding energies and their differences is obtained, comparable to that for even nuclei. The description of low-energy excitation spectra of odd nuclei is of varying quality depending on the nucleus.
5-Thia-2,8(N-alkyl)diaza-1-stanna(II)-bicyclo[3.3.01,5]octane - Intramolekular basenstabilisierte Diazastannylene
Creators: name: Tzschach, A.
name: Scheer, Manfred
name: Jurkschat, K.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: Die Titelverbindungen werden durch Umaminierung von Zinn(II)-dimethylamid mit den NH-funktionellen Verbindungen des Typs S(CH2CH2N(R)H)2 (R = t-Bu, i-Pr) bzw. durch Reaktion von Zinn(II)-chlorid mit den entsprechenden Lithiumamiden erhalten. Ihre monomere Struktur wird durch temperaturabhängige 1H-, 13C-, 119Sn-NMR- und Mößbauermessungen bewiesen.
Novel measurement of solids circulation rate in pilot-scale dual fluidized bed gasifier at high temperature
Creators: name: Rahman, Md. Hafizur
Publisher: name: University of British Columbia
Year: 2017

description: A number of fluidized bed reactor processes operating at high temperature require that solid particles be circulated back and forth between two reactor vessels. Since the circulation rate strongly affects mass and energy balances, and therefore greatly influences hydrodynamics and performance of the system, a reliable technique for its accurate measurement would be helpful in monitoring and modeling the process. However, there are no reported techniques suitable for measuring this critical hydrodynamic parameter at elevated temperatures typical of gasification systems. A novel thermal-tracing technique was developed for measuring the solids circulation rate between two vessels. Packets of particles at lower temperatures are injected into a downward-moving packed bed of solids at elevated temperature, creating reduced-temperature zones inside the moving bed. The transit time of the cold-particle-clusters between pairs of thermocouples is determined by cross correlation, allowing the flux to be estimated. The technique was shown to provide sensitive and reproducible data for a cold model unit with injection of dry ice. The technique was then applied to determine solids circulation rates between the bubbling bed gasifier and the riser combustor of a pilot scale dual fluidized bed gasification system. A number of conditions are imposed on the data to eliminate unsatisfactory data at high temperatures. Data which satisfy the discrimination criteria led to measured solids circulation fluxes up to 133 kg/m²s at temperatures up to 856°C in the gasifier test section. A novel butterfly valve technique was developed to validate the thermal-tracing technique at high temperatures. Closing the valve causes solids to accumulate in the downcomer section of the pilot gasifier. The elevation of the top surface of these solids was tracked with high-temperature capacitance sensors, facilitating determination of the solids circulation flux between the two reactors of the pilot plant. The fluxes were also estimated using two indirect methods based on pressure balance and energy balance techniques. Agreement among the fluxes obtained from applying these four techniques are reasonable given the difficulty in measuring solids circulation rates.
Mellin representation of the graviton bulk-to-bulk propagator in AdS
Creators: name: Balitsky, Ian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A Mellin-type representation of the graviton bulk-to-bulk propagator from Ref. 1 in terms of the integral over the product of bulk-to-boundary propagators is derived.
description: 3 pages
Phase transitions of hadronic to quark matter at finite T and μ_B
Creators: name: Liu, B.
name: Di Toro, M.
name: Shao, G. Y.
name: Greco, V.
name: Shen, C. W.
name: Li, Z. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The phase transition of hadronic to quark matter and the boundaries of the mixed hadron-quark coexistence phase are studied within the two Equation of State (EoS) model. The relativistic effective mean field approach with constant and density dependent meson-nucleon couplings is used to describe hadronic matter, and the MIT Bag model is adopted to describe quark matter. The boundaries of the mixed phase for different Bag constants are obtained solving the Gibbs equations. We notice that the dependence on the Bag parameter of the critical temperatures (at zero chemical potential) can be well reproduced by a fermion ultrarelativistic quark gas model, without contribution from the hadron part. At variance the critical chemical potentials (at zero temperature) are very sensitive to the EoS of the hadron sector. Hence the study of the hadronic EoS is much more relevant for the determination of the transition to the quark-gluon-plasma at finite baryon density and low-T. Moreover in the low temperature and finite chemical potential region no solutions of the Gibbs conditions are existing for small Bag constant values, B < (135 MeV)^4. Isospin effects in asymmetric matter appear relevant in the high chemical potential regions at lower temperatures, of interest for the inner core properties of neutron stars and for heavy ion collisions at intermediate energies.
description: 24 pages and 16 figures (revtex4)
Effects of Shear Forces and Pressure on Blood Vessel Function and Metabolism in a Perfusion Bioreactor.
Creators: name: Hoenicka, Markus
name: Wiedemann, Ludwig
name: Puehler, Thomas
name: Hirt, Stephan
name: Birnbaum, Dietrich E.
name: Schmid, Christof
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: Bovine saphenous veins (BSV) were incubated in a perfusion bioreactor to study vessel wall metabolism and wall structure under tissue engineering conditions. Group 1 vessels were perfused for 4 or 8 days. The viscosity of the medium was increased to that of blood in group 2. Group 3 vessels were additionally strained with luminal pressure. Groups 1-d through 3-d were similar except that BSV were endothelium-denuded before perfusion. Groups 1-a through 3-a used native vessels at elevated flow rates. Group 3 vessels responded significantly better to noradrenaline on day 4, whereas denuded vessels showed attenuated responses (p < 0.001). Tetrazolium dye reduction did not depend on perfusion conditions or time except for denuded vessels. pO(2) gradients across the vessels were independent of time and significantly higher in group 2 (p < 0.001). BSV converted glucose stoichiometrically to lactate except vessels of groups 3, 1-d, and 3-d which released more lactate than glucose could supply (p < 0.001). Group 1 vessels as well as all vessels perfused with elevated flow rates showed a loss of endothelial cells after 4 days, whereas group 2 and 3 vessels retained most of the endothelium. These data suggest that vessel metabolism was not limited by oxygen supply. Shear forces did not affect glucose metabolism but increased oxygen consumption and endothelial cell survival. Luminal pressure caused the utilization of energy sources other than glucose, as long as the endothelium was intact. Therefore, vessel metabolism needs to be monitored during tissue engineering procedures which challenge the constructs with mechanical stimuli.