cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nonspecific transcription factor-DNA binding influences nucleosome occupancy in yeast
Creators: name: Afek, Ariel
name: Sela, Itamar
name: Musa-Lempel, Noa
name: Lukatsky, David B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Biomolecules (q-bio.BM)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Quantitative understanding of the principles regulating nucleosome occupancy on a genome-wide level is a central issue in eukaryotic genomics. Here, we address this question using budding yeast, Saccharomyces cerevisiae, as a model organism. We perform a genome-wide computational analysis of nonspecific transcription factor (TF)-DNA binding free energy landscape, and compare this landscape with experimentally determined nucleosome binding preferences. We show that DNA regions with enhanced nonspecific TF-DNA binding are statistically significantly depleted of nucleosomes. We suggest therefore that the competition between TFs with histones for nonspecific binding to genomic sequences might be an important mechanism influencing nucleosome-binding preferences in vivo. We also predict that poly(dA:dT) and poly(dC:dG) tracts represent genomic elements with the strongest propensity for nonspecific TF-DNA binding, thus allowing TFs to outcompete nucleosomes at these elements. Our results suggest that nonspecific TF-DNA binding might provide a barrier for statistical positioning of nucleosomes throughout the yeast genome. We predict that the strength of this barrier increases with the concentration of DNA binding proteins in a cell. We discuss the connection of the proposed mechanism with the recently discovered pathway of active nucleosome reconstitution.
Stick-slip in a stack: how slip dissonance reveals aging
Creators: name: Poincloux, Samuel
name: Reis, Pedro M.
name: de Geus, Tom W. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We perform physical and numerical experiments to study the stick-slip response of a stack of slabs in contact through dry frictional interfaces driven in quasistatic shear. The ratio between the drive's stiffness and the slab's shear stiffness controls the presence or absence of slip synchronization. A sufficiently high stiffness ratio leads to synchronization, comprising periodic slip events in which all interfaces slip simultaneously. A lower stiffness ratio leads to asynchronous slips and, experimentally, to the stick-slip amplitude becoming broadly distributed as the number of layers in the stack increases. We interpret this broadening in light of the combined effect of complex loading paths due to the asynchronous slips and creep. Consequently, the aging rate of the interfaces can be readily extracted from the stick-slip cycles, and it is found to be of the same order of magnitude as existing experimental results on a similar material. Finally, we discuss the emergence of slow slips and an increase in aging-rate variations when more slabs are added to the stack.
Chronological and genetic analysis of an Upper Palaeolithic female infant burial from Borsuka Cave, Poland
Creators: name: Fewlass, Helen
name: Zavala, Elena I
name: Fagault, Yoann
name: Tuna, Thibaut
name: Bard, Edouard
name: Hublin, Jean-Jacques
name: Hajdinjak, Mateja
name: Wilczyński, Jarosław
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: classificationCode: Infectious Disease
subject: Infectious Disease
classificationCode: Genetics & Genomics
subject: Genetics & Genomics
classificationCode: Ecology,Evolution & Ethology
subject: Ecology,Evolution & Ethology

description: No description supplied
Prospects for Ground-Water Irrigation: Declining Levels and Rising Energy Costs
Creators: name: Sloggett, Gordon
name: Sloggett, Gordon
Publisher: name: Unknown
Year: 1981
Subjects: subject: Crop Production/Industries
subject: Resource /Energy Economics and Policy
subject: Ground water
subject: irrigation
subject: aquifer
subject: energy

description: Ground water, an irreplaceable resource tapped from underground reservoirs, is decreasing in 11 major irrigating States. Pumping from greater depths will add to irrigation fuel costs, but rising energy prices will likely be a more serious constraint to expanded ground-water irrigation. Declining ground-water levels may not significantly reduce the irrigated area in the United States until well into the next century.
Generalized Berreman's model of the elastic surface free energy of a nematic liquid crystal on a sawtoothed substrate
Creators: name: Rojas-Gómez, O. A.
name: Romero-Enrique, J. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this paper we present a generalization of Berreman's model for the elastic contribution to the surface free-energy density of a nematic liquid crystal in presence of a sawtooth substrate which favours homeotropic anchoring, as a function of the wavenumber of the surface structure $q$, the tilt angle $α$ and the surface anchoring strength $w$. In addition to the previously reported non-analytic contribution proportional to $q\ln q$, due to the nucleation of disclination lines at the wedge bottoms and apexes of the substrate, the next-to-leading contribution is proportional to $q$ for a given substrate roughness, in agreement with Berreman's predictions. We characterise this term, finding that it has two contributions: the deviations of the nematic director field with respect to the corresponding to the isolated disclination lines, and their associated core free energies. Comparison with the results obtained from the Landau-de Gennes model shows that our model is quite accurate in the limit $wL>1$, when strong anchoring conditions are effectively achieved.
description: 13 pages, 9 figures; revised version submitted to Phys. Rev. E
Desarrollo de un sistema modular para el diseño y planificación de hospitales accesibles: bloque quirúrgico
Creators: name: Bove, Natalia Noemí Massaccesi
name: Gastón Jarén
name: Castillo, Guillermo
Publisher: name: Zenodo
Year: 2023
Subjects: Construcción modular
Área quirúrgica
Accesibilidad

description: La construcción modular se ha vuelto muy popular en el último año debido a la versatilidad y rapidez de la obtención de resultados. Permite alcanzar el objetivo de forma eficaz y eficiente en un tiempo reducido con una moderada inversión. Esto lo torna sumamente valioso debido a que se pueden obtener módulos hospitalarios, en este caso, totalmente útiles y funcionales para emergencias y/o necesidad, como, por ejemplo, pandemias, desastres naturales, entre otros. El presente trabajo consiste en el desarrollo del módulo accesible del área quirúrgica que cumple con todos los requisitos exigidos por las normas locales y del país vigentes. Debido al crecimiento de la población, se busca la construcción e instalación del mismo de forma rápida a fin de abastecer las necesidades de la misma. La idea surge de la inexistencia actual de hospitales inclusivos y accesibles por lo que mucha gente se encuentra excluida. Se realizó la recopilación de normativa vigente que se encuentra dispersa, a fin de facilitar el diseño de las áreas sanitarias. En este caso, se comenzó con la proyección de un quirófano al cual se le podrán adicionar otras áreas. El proyecto consta de realizar el m ́odulo implementando el dise ̃no de las instalaciones eléctricas, de los gases medicinales, de la circulación del personal, residuos, pacientes, etc., y de los elementos estructurales que lo componen.
Introductory Study of Weeds Associated with Agricultural Crops in Al-Oht and AlOhit Area of Saudia Arabia
Creators: name: Majrashi, Ali
Publisher: name: figshare
Year: 2020
Subjects: subject: 70302 Agronomy
subject: FOS: Agriculture, forestry and fisheries

description: Background:This study represents the first report about weed species in agricultural crop in Al-Oht and Al-Ohit area of Saudi Arabia. The present paper is based on the results of taxonomic research work conducted in Al-Oht and Al-Ohit District of Saudia Arabia in 2016. Twenty two (22) agricultural fields from two district of Saudi Arabia were selected for the identification and collection of weed species. All the collected weeds were cleaned, dried and prepared herbarium for identification. Objective:The area was extensively surveyed in order to identify weeds associated with agricultural crops of two area of Saudi Arabia. From the study area twenty on (21)weed species belonging to fourteen (14) families were identified in the light of available literature. Results:The results showed that Poaceae family has the highest number of weeds species which include Cynodon dactylon, Stipagrrostis bemralri and Polypogon monsepeliensis. On the other hand, Convolvulaceae family has only two weeds species viz Convolvulusarvensis and Ipomoea sp.In this study, weed density was also measured and the results showed that Portulaceae family having the highest weed density of 799. Portnlacaoleracea was recorded to be the highest density amongst other species and Euophorbiagronulata has the lowest weed density in both studied area of Saudi Arabia. Weeds on one hand causeserious problems and on the other hand they are used for various purposes. Conclusion:Data inventory consists of botanical name, family, and density of weeds which are significant in P<0.05. From the results, it can be concluded that Poaceae family having the highest number of weed species and Convolvulaceae has the lowest weed density in Al-Oht and Al-Ohit area of Saudi Arabia.
MPEC 2023-W138 : DAILY ORBIT UPDATE (2023 November 28)
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

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.
Rehashing the bit-interleaved coded modulation
Creators: name: Anhari, Alireabout:Za Kenarsari
Publisher: name: University of British Columbia
Year: 2010

description: Bit-interleaved coded modulation (BICM) is a pragmatic yet powerful approach for spectrally efficient coded transmission. BICM was originally designed as a superior alternative to the conventional trellis coded modulation in fading channels. However, its flexibility and ease of implementation also make BICM an attractive scheme for transmission over unfaded channels. In fact, a noticeable advantage of BICM is its simplicity and flexibility. Notably, most of today’s communication systems that achieve high spectral efficiency such as ADSL, Wireless LANs, and WiMax feature BICM. Perceptibly, the design of efficient BICM-based transmission strategies relies on the existence of a general analytical framework for evaluating its performance. Therefore, alongside its vast popularity and deployment, performance evaluation of BICM has attracted considerable attention. Developing such a performance evaluation framework is one of the main contributions of this thesis. In addition to conventional additive white Gaussian noise model, the practically important case of transmission over fading channels impaired by Gaussian mixture noise has also been studied. Different from previously proposed methods, our scheme results in closed-form expressions and is valid for arbitrary mapping rules and fading distributions. Furthermore, making use of the newly developed framework, we propose two novel transmission strategies. First, we consider the problem of optimal power allocation for a BICM system employing orthogonal frequency division multiplexing. In particular, we show that this problem translates into a linear program in the high signal-to-noise ratio regime. This reformulation extends the applicability and delivers considerable complexity reduction in comparison to existing algorithms. Finally, we propose novel detector architectures for a BICM system employing iterative decoding using hard-decision feedback at the receiver. We show that, taking the feedback error into account results in considerable performance improvement while retains decoding complexity.
On semiclassical analysis of pure spinor superstring in an AdS_5 x S^5 background
Creators: name: Aisaka, Yuri
name: Bevilaqua, L. Ibiapina
name: Vallilo, Brenno C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Relation between semiclassical analyses of Green-Schwarz and pure spinor formalisms in an AdS_5 x S^5 background is clarified. It is shown that the two formalisms have identical semiclassical partition functions for a simple family of classical solutions. It is also shown that, when the classical string is furthermore rigid, this in turn implies that the two formalisms predict the same one-loop corrections to spacetime energies.
description: 36 pages
A TLR7 antagonist restricts interferon-dependent and -independent immunopathology in a mouse model of severe influenza.
Creators: name: Rappe, Julie CF
name: Finsterbusch, Katja
name: Crotta, Stefania
name: Mack, Matthias
name: Priestnall, Simon L
name: Wack, Andreas
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: subject: Model organisms
subject: Infectious Disease
subject: Human Biology & Physiology
subject: Immunology
subject: FOS: Clinical medicine

description: Cytokine-mediated immune-cell recruitment and inflammation contribute to protection in respiratory virus infection. However, uncontrolled inflammation and the "cytokine storm" are hallmarks of immunopathology in severe infection. Cytokine storm is a broad term for a phenomenon with diverse characteristics and drivers, depending on host genetics, age, and other factors. Taking advantage of the differential use of virus-sensing systems by different cell types, we test the hypothesis that specifically blocking TLR7-dependent, immune cell-produced cytokines reduces influenza-related immunopathology. In a mouse model of severe influenza characterized by a type I interferon (IFN-I)-driven cytokine storm, TLR7 antagonist treatment leaves epithelial antiviral responses unaltered but acts through pDCs and monocytes to reduce IFN-I and other cytokines in the lung, thus ameliorating inflammation and severity. Moreover, even in the absence of IFN-I signaling, TLR7 antagonism reduces inflammation and mortality driven by monocyte-produced chemoattractants and neutrophil recruitment into the infected lung. Hence, TLR7 antagonism reduces diverse types of cytokine storm in severe influenza.
Coleção de Resenhas Prêmio FNLIJ 2022
Creators: name: Castro, Maria Das Graças Monteiro
Publisher: name: Zenodo
Year: 2022
Subjects: Literatura infantil
Literatura juvenil
Livro
Leitura

description: Elaborada para a 48ª Seleção Anual – Prêmio FNLIJ 2022 – Produção 2021.
Extended Mixture of MLP Experts by Hybrid of Conjugate Gradient Method and Modified Cuckoo Search
Creators: name: Salimi, Hamid
name: Giveki, Davar
name: Soltanshahi, Mohammad Ali
name: Hatami, Javad
Publisher: name: arXiv
Year: 2012
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper investigates a new method for improving the learning algorithm of Mixture of Experts (ME) model using a hybrid of Modified Cuckoo Search (MCS) and Conjugate Gradient (CG) as a second order optimization technique. The CG technique is combined with Back-Propagation (BP) algorithm to yield a much more efficient learning algorithm for ME structure. In addition, the experts and gating networks in enhanced model are replaced by CG based Multi-Layer Perceptrons (MLPs) to provide faster and more accurate learning. The CG is considerably depends on initial weights of connections of Artificial Neural Network (ANN), so, a metaheuristic algorithm, the so-called Modified Cuckoo Search is applied in order to select the optimal weights. The performance of proposed method is compared with Gradient Decent Based ME (GDME) and Conjugate Gradient Based ME (CGME) in classification and regression problems. The experimental results show that hybrid MSC and CG based ME (MCS-CGME) has faster convergence and better performance in utilized benchmark data sets.
description: 13 pages, 2 figures
Transylvanosaurus Augustin, Bastiaans, Dumbravă & Csiki-Sava, 2022, gen. nov.
Creators: name: Augustin, Felix J.
name: Bastiaans, Dylan
name: Dumbravă, Mihai D.
name: Csiki-Sava, Zoltán
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ornithischia
Rhabdodontidae
Transylvanosaurus

description: TRANSYLVANOSAURUS gen. nov.
 Type Species — Transylvanosaurus platycephalus sp. nov.
 Etymology —‘Trans’ (Latin) meaning across, ‘silva’ (Latin) meaning forest, and ‘sauros’ (Greek σαύρος) meaning lizard (‘Lizard from across the forest’). The genus is named after Transylvania, the historical region that includes the Hateg Basin and the type locality of the genus.
 Diagnosis —As for the type and only species.
description: Published as part of Augustin, Felix J., Bastiaans, Dylan, Dumbravă, Mihai D. & Csiki-Sava, Zoltán, 2022, A new ornithopod dinosaur,  Transylvanosaurus platycephalus  gen. et sp. nov. (Dinosauria: Ornithischia), from the Upper Cretaceous of the Haţeg Basin, Romania, pp. 1-23 in Journal of Vertebrate Paleontology (e 2133610) (e 2133610) 42 (2) on page 4, DOI: 10.1080/02724634.2022.2133610, http://zenodo.org/record/7503790
Relationship between Pushing Behavior and Crowd Dynamics
Creators: name: Üsten, Ezel
name: Schumann, Jette
name: Sieben, Anna
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: 11th Pedestrian and Evacuation Dynamics Conference, PED2023, Eindhoven, Netherlands, 28 Jun 2023 - 30 Jun 2023
description: Crowds often form due to limited capacities of walking facilities, causing people to gather in close proximity. Without any clear guidance for queueing, crowds are susceptible to pushing behavior by pedestrians who want to quickly access their goal. It is especially common in scenarios where there is only one main exit or entrance, such as for entrance systems for events. When people push their way through a crowd, it can create a dense environment [1, 2] that can be hazardous to the person being pushed. However, pushing behavior in crowds is not always present and can vary depending on social context and norms [2]. It may decrease or disappear if the environment promotes unity and helping others [3], but can also increase or appear as motivations shift. Pushing behavior is therefore dynamic and can change over time. Lügering et al. [4] developed a forward motion category system that includes the following categories of pushing: strong pushing, mild pushing, just walking, and falling behind. This system allows researchers to rate individual pushing behavior which can be combined with pedestrian trajectories, allowing the individual effects to be seen throughout the sequence. The proposed work aims to use this rating system and to examine the relationship between pushing behavior and the physical properties of a crowd. To do this, we will observe pushing occurrences from laboratory studies using trajectory data extended by pushing states and link them with properties such as distance to the goal, density and flow (see Fig.1). This will allow us to identify individual pushing occurrences on a large scale and collective patterns, and to understand the causal relationship between pushing behavior and changes in the crowd. This understanding can later be used to inform the design of crowd management strategies and improve safety in crowded environments.
Realigning random states
Creators: name: Aubrun, Guillaume
name: Nechita, Ion
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study how the realignment criterion (also called computable cross-norm criterion) succeeds asymptotically in detecting whether random states are separable or entangled. We consider random states on $\C^d \otimes \C^d$ obtained by partial tracing a Haar-distributed random pure state on $\C^d \otimes \C^d \otimes \C^s$ over an ancilla space $\C^s$. We show that, for large $d$, the realignment criterion typically detects entanglement if and only if $s \leq (8/3π)^2 d^2$. In this sense, the realignment criterion is asymptotically weaker than the partial transposition criterion.
title: FLAVODOXIN, THE HYDROGEN ATOM OF FLAVOPROTEINS
title: A 19F NMR STUDY OF DYNAMICS AND CONFORMATIONAL CHANGES UTILIZING FLAVODOXIN FROM RHODOPSEUDOMONAS PALUSTRIS
titleType: Subtitle
Creators: name: Varner , Taylor
Publisher: name: University of Kentucky Libraries
Year: 2020
Subjects: subject: FOS: Chemical sciences

description: Flavodoxin is a small, highly stable protein that contain a single FMN cofactor used to transfer single electrons at low potentials. The organism Rhodopseudomonas palustris contains a long-chain flavodoxin. Long-chain flavodoxins are characterized by a 20 amino acid loop that is proposed to allow interactions with partner proteins. We plan to utilize this protein as a model to build our repertoire with protein fluorination and fluorine NMR in flavoproteins. This tool kit will then be applied to the study of a partner protein of interest that is capable of performing electron bifurcation. We have incorporated m-fluoro tyrosine into flavodoxin and carried out 19F NMR studies. We have completed peak assignment via mutation, observed temperature-based dynamics, observed flavin tyrosine interactions during flavin reduction, monitored reduction titrations optically, and observed a single residue in slow exchange which was studied using 2D exchange spectroscopy. All of these studied have worked to further our understanding of flavodoxin. Our hope is that these works can be used to further understand of protein conformational changes, dynamics, and partner protein interactions in bifurcating electron transfer proteins from Rhodopseudomonas palustris
description: © 2020 Taylor Varner
JUNO's sensitivity to 7Be, pep and CNO solar neutrinos
Creators: name: Singhal, Apeksha
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: European Physical Society Conference on High Energy Physics, EPS-HEP 2023, Hamburg, Germany, 21 Aug 2023 - 25 Aug 2023
description: JUNO Experiment is a 20 kt multipurpose liquid scintillator detector located in China, with planned completion of construction in 2023. Its main goal is the Neutrino Mass Ordering determination, exploiting its large target mass and excellent energy resolution of 3% at 1 MeV. Due to its unique properties, JUNO will have a large potential for real-time solar neutrino measurement. A sensitivity study is performed by considering all possible sources of backgrounds including their various concentration levels and a full simulation of the detector response with the usage of reconstructed variables. Results have shown that $^7$Be, pep and CNO solar neutrinos will be measured with an uncertainty highly competitive with respect to the current state-of-the-art in the solar neutrino field obtained by Borexino after a few years of data taking. Furthermore, JUNO has the potential to measure individually for the first time the rate of the two main components of the CNO neutrino flux, $^{13}$N and $^{16}$O solar neutrinos, given that the backgrounds are kept under control. This poster will summarize the strategy used for the estimation of the JUNO sensitivity to $^7$Be, $pep$, and CNO solar neutrinos above the 0.45 MeV threshold and the final results.
Einfluss von Druckmittelspannungen auf die Betriebsfestigkeit von geschweißten Schiffskonstruktionen
Creators: name: Rörup, Jörg
Publisher: name: TUHH Universitätsbibliothek
Year: 2003
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Einfluss von Druckmittelspannungen auf die Betriebsfestigkeit von geschweißten Schiffskonstruktionen
The Effects of Tax Policy on American Agriculture
Creators: name: Davenport, Charles
name: Boehlje, Michael D.
name: Martin, David B. H.
name: Davenport, Charles
name: Boehlje, Michael D.
name: Martin, David B. H.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Agricultural Finance
subject: Farm Management
subject: Land Economics/Use
subject: Public Economics
subject: Tax shelter
subject: land prices
subject: growth of firm
subject: cash accounting
subject: special use valuation
subject: deferred payment of estate taxes
subject: tax preferences
subject: management practices

description: Federal tax policy appears to have a significant impact on American agriculture. Generally, tax policy has led to upward pressure on farmland prices, larger farm sizes, incentives for farm incorporation, altered management practices, and increased use of farmland as a tax shelter—by both farmers and nonfarmers.
Modeling the Infrared Spectrum of the Earth-Moon System: Implications for the Detection and Characterization of Earthlike Extrasolar Planets and their Moonlike Companions
Creators: name: Robinson, Tyler D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Large surface temperatures on the illuminated hemisphere of the Moon can lead it to contribute a significant amount of flux to spatially unresolved infrared (IR) observations of the Earth-Moon system, especially at wavelengths where Earth's atmosphere is absorbing. We have paired the NASA Astrobiology Institute's Virtual Planetary Laboratory three-dimensional spectral Earth model with a model of the phase dependent IR spectrum of a Moonlike satellite to investigate the effects of an unresolved companion on IR observations of Earthlike extrasolar planets. For an extrasolar twin Earth-Moon system observed at full phase at IR wavelengths, the Moon consistently comprises about 20% of the total signal, approaches 30% of the signal in the 9.6 micron ozone band and the 15 micron carbon dioxide band, makes up as much as 80% of the total signal in the 6.3 micron water band, and more than 90% of the signal in the 4.3 micron carbon dioxide band. These excesses translate to inferred brightness temperatures for Earth that are too large by about 20-40 K, and demonstrate that the presence of an undetected satellite can have a significant impact on the spectroscopic characterization of terrestrial exoplanets. The thermal flux contribution from an airless companion depends strongly on the star-planet-observer angle (i.e., the phase angle), allowing moons to mimic or mask seasonal variations in the host planet's IR spectrum, and implying that observations of exoplanets should be taken when the phase angle is as small as feasibly possible if contributions from airless companions are to be minimized. We show that, by differencing IR observations of an Earth twin with a companion taken at both gibbous phase and at crescent phase, Moonlike satellites may be detectable by future exoplanet characterization missions for a wide range of system inclinations.
description: 23 pages, 1 table, 5 figures; appearing in ApJ
Einfluss aller Erhebungen am Schiffskörper auf den Wellenwiderstand, insbesondere Wulst am Bug und Keil am Heck : Bericht
Creators: name: Kracht, Alfred
Publisher: name: TUHH Universitätsbibliothek
Year: 1961
Subjects: subject: Wellenwiderstand
subject: Bugwulst
classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Einfluss aller Erhebungen am Schiffskörper auf den Wellenwiderstand, insbesondere Wulst am Bug und Keil am Heck
A Multi-Class SWAP-Test Classifier
Creators: name: Pillay, S M
name: Sinayskiy, I
name: Jembere, E
name: Petruccione, F
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multi-class classification problems are fundamental in many varied domains in research and industry. To solve multi-class classification problems, heuristic strategies such as One-vs-One or One-vs-All can be employed. However, these strategies require the number of binary classification models developed to grow with the number of classes. Recent work in quantum machine learning has seen the development of multi-class quantum classifiers that circumvent this growth by learning a mapping between the data and a set of label states. This work presents the first multi-class SWAP-Test classifier inspired by its binary predecessor and the use of label states in recent work. With this classifier, the cost of developing multiple models is avoided. In contrast to previous work, the number of qubits required, the measurement strategy, and the topology of the circuits used is invariant to the number of classes. In addition, unlike other architectures for multi-class quantum classifiers, the state reconstruction of a single qubit yields sufficient information for multi-class classification tasks. Both analytical results and numerical simulations show that this classifier is not only effective when applied to diverse classification problems but also robust to certain conditions of noise.
description: 13 pages, 9 figures
Space Shift Keying (SSK-) MIMO with Practical Channel Estimates
Creators: name: Di Renzo, Marco
name: De Leonardis, Dario
name: Graziosi, Fabio
name: Haas, Harald
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we study the performance of space modulation for Multiple-Input-Multiple-Output (MIMO) wireless systems with imperfect channel knowledge at the receiver. We focus our attention on two transmission technologies, which are the building blocks of space modulation: i) Space Shift Keying (SSK) modulation; and ii) Time-Orthogonal-Signal-Design (TOSD-) SSK modulation, which is an improved version of SSK modulation providing transmit-diversity. We develop a single-integral closed-form analytical framework to compute the Average Bit Error Probability (ABEP) of a mismatched detector for both SSK and TOSD-SSK modulations. The framework exploits the theory of quadratic-forms in conditional complex Gaussian Random Variables (RVs) along with the Gil-Pelaez inversion theorem. The analytical model is very general and can be used for arbitrary transmit- and receive-antennas, fading distributions, fading spatial correlations, and training pilots. The analytical derivation is substantiated through Monte Carlo simulations, and it is shown, over independent and identically distributed (i.i.d.) Rayleigh fading channels, that SSK modulation is as robust as single-antenna systems to imperfect channel knowledge, and that TOSD-SSK modulation is more robust to channel estimation errors than the Alamouti scheme. Furthermore, it is pointed out that only few training pilots are needed to get reliable enough channel estimates for data detection, and that transmit- and receive-diversity of SSK and TOSD-SSK modulations are preserved even with imperfect channel knowledge.
description: IEEE Transactions on Communications (to appear, 2012)
Identification, isolation and characterization of murine adult adipogenic progenitor cells
Creators: name: Joe, Aaron Wai Bun
Publisher: name: University of British Columbia
Year: 2010

description: White adipose tissue, or fat, is a complex endocrine tissue important for energy storage and metabolism, and has significant effects on various physiological phenomena, including growth, behaviour, reproduction and immune-modulation. It has been proposed that fat cells, or adipocytes, arise from connective tissue cells that fill with lipid; however, mounting evidence suggests that adipocytes represent a distinct lineage with its own cellular origins. Yet very little is known about the cells that give rise to new adipocytes. Here, my colleagues and I developed a strategy to isolate purified populations of adipogenic progenitor (AP) cells from subcutaneous fat, visceral fat and skeletal muscle, using fluorescence-activated cell sorting. These cells are capable of robust adipogenic differentiation, even at the single cell level. We confirmed their commitment to the adipogenic lineage using a variety of assays, and reveal that they are lineage-restricted cells, incapable of osteogenic, chondrogenic or myogenic differentiation. Thus, we have developed an enabling technology to allow interrogation of the adipocyte lineage among different tissues and fat depots, during different physiological, pathological or developmental stages. Recent evidence suggests that fat depots with a greater ability to generate new adipocytes are associated with lower metabolic risk. Using our isolation strategy, we confirmed that metabolically healthier depots are associated with greater AP abundance and activity, uncovering a link between stem cell biology and metabolic disease. However, adipocyte production in non-adipose tissues, such as skeletal muscle and bone marrow, is associated with chronic disease and aging. To explore possible reasons for this dichotomy, we examined the role of APs in a model of skeletal muscle injury. Our results suggest that APs expand after damage to assist in muscle regeneration by establishing a pro-myogenic niche, ascribing to them a novel function that is independent of adipogenesis. Together, our strategy to interrogate the adipogenic lineage has allowed us to formulate new hypotheses to explain adipose and skeletal muscle physiology. This technology forms the basis for future work that will to allow us to understand how new adipocytes are formed, and perhaps permit the manipulation of adipogenic progenitors for therapeutic benefit.
Weeds Surveyof Developing Agricultural Crops in Al-Shafa Area of Saudi Arabia
Creators: name: Majrashi, Ali
Publisher: name: figshare
Year: 2020
Subjects: subject: 70302 Agronomy
subject: FOS: Agriculture, forestry and fisheries

description: Background: Weeds are developing wild plants grown in different areas without the human will or desire than the consequences of this growth, different things, including what is positive and some are negative. This study represents the first report about the identified weed species in agricultural crop field in Al-Shafa area of Saudi Arabia. A survey was conducted to investigate the weed flora in agricultural fields of Al-Shafa region of Saudi Arabia. Weeds are common in many landscape situations including agricultural fields for commercial cultivation in Al- Shafa region of Saudi Arabia. Twenty two (22) agricultural fields from two district of Saudi Arabia were selected for the identification and collection of weed species. All the collected weeds were cleaned, dried and prepared herbarium for identification. Objectives: The aim of this study was identify the common weeds of agricultural crops in the Al- Shafa region. Results: The results showed that the existence of a vital diversity to a group of developing weeds, where were identified weeds that belong to the family 18, and 35 species of weeds. The results showed that the highest density weeds of was recorded from Brassicaceae family, whereas, the lowest weed density was recorded in lamiaceae family. Ten weed species Asteraceae family, four (4) species from both Amaranthaceae and from Brassicaceae family were recorded from the Al-Shafa region. Whereas, only one species were found from lamiaceae family. Conclusion: This study has shown that the most prevalent of the weed family: Brassicaceae and the most widespread weed is Brassica tournefortii. This study has great significant value to develop Al-shafa agricultural industry.
title: Die Rolle von Gαi3 in murinen Thrombozyten
Creators: name: Spitzhüttl, Haito Konrad
Publisher: name: Universität Tübingen
Year: 2025
Subjects: subject: 000
subject: 610
subject: Plättchen

description: G-Proteine nehmen eine zentrale Rolle in der interzellulären Kommunikation im menschlichen Körper ein. Die Funktion dieser Kommunikationsmechanismen ist von besonderem wissenschaftlichen als auch medizinischem Interesse. In dieser Arbeit wurde die Rolle von Gαi3 in Thrombozyten mit Hilfe von Mäusen mit Plättchen-spezifischer Gnai3-, globaler Gnai3-, Plättchen-spezifischer Gnai2- und Gnai2/i3-Defizienz, sowie korrespondierenden Kontrolltieren untersucht. Zunächst wurde die Expression der Oberflächenproteine GPV GPVI GPIX, α5 und β3 auf ruhenden Thrombozyten analysiert. Um den Grad der Aktivierung der Thrombozyten zu bestimmen, wurde der Anstieg der CD62P-Expression und JON/A-Bindung nach Aktivierung mit verschiedenen Substanzen (ADP, CRP, Thrombin und U46619) betrachtet. Das Mitochondriale Membranpotential ist der grundlegende Schlüssel für die Energiegewinnung in der Zelle und wurde mit dem Farbstoff TMRE, der Änderungen dieses Potentials anzeigt, detektiert. Je nach Aktivierungsgrad gehen die Thrombozyten unterschiedlich schnell in den Zustand des geregelten Zelltods. AnnexinV fungiert hierbei als Apoptosemarker, der an externalisiertes Phosphatidylserin bindet. Zuletzt wurde noch die Komplexbildung zwischen Gnai-defizienten Thrombozyten und neutrophilen Granulozyten nach Aktivierung bestimmt. Beim Betrachten der Expression der Oberflächenproteine in Ruhe konnten keine Unterschiede zwischen Thrombozyten mit und ohne Gnai2-, Gnai3- oder Gnai2/i3-Defizienz festgestellt werden. Bei einer Gαi2-Defizienz ist eine geringere CD62P- und JON/A-Bindung nach Aktivierung mit ADP zu registrieren. Nach CRP- und Thrombin-Aktivierung konnten in Gnai3-defizienten Thrombozyten ebenfalls geringere Mengen an aktiviertem αIIbβ3 festgestellt werden. Bei der Untersuchung des mitochondrialen Membranpotentials wurden keinerlei Auswirkungen der Gnai2- und/oder Gnai3-Defizienz registriert. Bei der Einleitung der Apoptose, zeigte eine Gnai3-Defizienz einen protektiven Effekt. Die Komplexbildung zwischen neutrophilen Granulozyten und Thrombozyten zeigte nur bei Gnai2-Defizienz der Thrombozyten eine geringere Anzahl nach CRP-Aktivierung.
On the Boundary Value Problem with the Operator in Boundary Conditions for the Operator-Differential Equation of the Third Order
Creators: name: Aliev, Araz R.
name: Babayeva, Sevindj F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 34B40, 35J40, 47D03

description: In this paper the boundary value problem for one class of the operator-differential equations of the third order on a semi-axis, where one of the boundary conditions is perturbed by some linear operator is researched. There are received sufficient conditions on the operator coefficients of the considered boundary value problem, providing its correct and univalent resolvability in Sobolev type space.
title: Transfemoral access in trans-catheter aortic valve implantation: surgical cut-down vs. percutaneous with the ProGlide system. Evaluation of 1,600 patients
Creators: name: Fiala, Anna
Publisher: name: Universität Tübingen
Year: 2025
Subjects: subject: Transkatheter-Aortenklappenimplantation
subject: 610

description: Hintergrund: Die perkutane Gefäßverschlussmethode hat sich zunehmend als bevorzugter Standard im Vergleich zur chirurgischen cut-down Technik bei Transkatheter-Aortenklappenimplantationen (TAVI) etabliert. Allerdings fehlt für diesen Wandel in der Therapie die ausreichende evidenzbasierte Datenlage. Zielsetzungen: Ziel dieser retrospektiven Kohortenstudie war es, die Häufigkeit vaskulärer-, blutungs- und wundheilungs- Komplikationen bei zwei verschiedenen Gefäßverschlussmethoden für TF-TAVI zu bewerten: die vollständig perkutane Methode mit dem ProGlide-Verschlusssystem und die chirurgische cut-down Technik. Studiendesign: Retrospektive Kohortenstudie. Rahmen: Alle TF-TAVI-Eingriffe zwischen 2010 und 2020 in dem Herzzentrum Klinikum Stuttgart. Studienteilnehmer: Die Auswahl der Patienten für die perkutanen und chirurgischen Verschlusskohorten erfolgte unter Verwendung präoperativer Variablen wie Alter, BMI, Diabetes mellitus mittels Propensity-Score-Matching. Messmethoden: Die adjustierte Odds-Ratio für diese Endpunkte wurde mithilfe multivariater logistischer Regression unter Verwendung von Faktoren, die mittels univariater logistischer Regression identifiziert wurden, berechnet. Dieser Ansatz wurde auf den gesamten Datensatz angewendet und anschließend zur Analyse von Untergruppen basierend auf der Schleusengröße verwendet. Ergebnisse: Von den 1600 TAVI-Eingriffen blieben nach Propensity-Matching 704 Patienten sowohl in den perkutanen als auch in den chirurgischen Kohorten erhalten. Die chirurgische Verschlussmethode war mit einer erhöhten innerklinischen Sterblichkeitsrate assoziiert (OR=3,88, 95%-KI 1,44–10,44, p=0,01), während der perkutane Verschluss ein erhöhtes Blutungsrisiko aufwies (OR=3,57, 95%-KI 1,69– 7,69, p<0,001). Die Wahl des Gefäßverschlusses hatte keine signifikante Auswirkung auf die intraoperative Mortalität, vaskuläre Komplikationen oder Wundheilungskomplikationen. Die einzige signifikante Beobachtung in der Untergruppenanalyse war die Assoziation zwischen dem perkutanen Verschluss mit Schleusengröße 18 Fr und Blutungen (OR=12,5, 95%-KI 1,64–100, p=0,01).
Optimal Choices of Reference for a Quasi-local Energy: Spherically Symmetric Spacetimes
Creators: name: Wu, Ming-Fan
name: Chen, Chiang-Mei
name: Liu, Jian-Liang
name: Nester, James M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: For a given timelike displacement vector the covariant Hamiltonian quasi-local energy expression requires a proper choice of reference spacetime. We propose a program for determining the reference by embedding a neighborhood of the two-sphere boundary in the dynamic spacetime into a Minkowski reference, so that the two sphere is embedded isometrically, and then extremizing the energy to determine the embedding variables. Applying this idea to Schwarzschild spacetime, we found that for each given future timelike displacement vector our program gives a unique energy value. The static observer measures the maximal energy. Applied to the Friedmann-Lemaitre-Robertson-Walker spacetime, we find that the maximum energy value is nonnegative; the associated displacement vector is the unit dual mean curvature vector, and the expansion of the two-sphere boundary matches that of its reference image. For these spherically symmetric cases the reference determined by our program is equivalent to isometrically matching the geometry at the two-sphere boundary and taking the displacement vector to be orthogonal to the spacelike constant coordinate time hypersurface, like the timelike Killing vector of the Minkowski reference.
description: 12 pages
title: Chatbots as Social Actors: Towards a Better Understanding of Social Responses to Text-Based Conversational Service Agents
Creators: name: Klein, Stefanie Helene
Publisher: name: Universität Tübingen
Year: 2025
Subjects: subject: Chatbot , Mensch-Maschine-Kommunikation , Künstliche Intelligenz , Anthropomorphismus
subject: 300
subject: 330
subject: conversational agent
subject: human-machine communication
subject: human-computer interaction
subject: artificial intelligence
subject: communicative AI
subject: anthropomorphism

description: We are living in a world where we not only interact with other humans but also with artificial agents like chatbots and voice assistants. When communicating with companies in particular, text-based chatbots conveniently answer our questions and complete tasks for us. Although developed using technologies based on artificial intelligence (AI), chatbots often fail to fulfill users’ expectations and satisfy users’ needs, for example, because they do not understand requests. This gives rise to two questions explored in this dissertation: Do people prefer the service of a human agent or a chatbot? And if organizations decide to use chatbots, how should these agents behave towards the user? Chapter 2 experimentally finds that people would rather consult a human agent than a chatbot to receive study advice; still, the chatbot interaction was perceived as more enjoyable. In addition, human-like communication through responsive verbal cues can increase users’ perceptions of an agent’s likability and warmth as well as their overall satisfaction with the service encounter. Chapter 3 corroborates these findings in an experiment with a customer service chatbot by showing that human-like error responses improve user satisfaction. However, the appreciation for a human-like free text interaction with a chatbot is diminished by the lower perceived user-friendliness. Finally, Chapter 4 examines the relationship between human-likeness and users’ cognitive, affective, and behavioral responses from a meta-perspective. The chapter confirms the findings from Chapters 2 and 3 by demonstrating that human-likeness has a small positive overall effect, which varies depending on the social response in focus and in different circumstances. Taken together, this dissertation contributes to the research field of human-machine communication by enhancing our understanding of users’ social responses to text-based service chatbots. The dissertation provides recommendations for organizations that want to use chatbots effectively and responsibly, points out implications for politics and society and opens up an outlook for future research questions.
Supplementary Materials from Social touch deprivation during COVID-19: effects on psychological wellbeing and craving interpersonal touch
Creators: name: Von Mohr, Mariana
name: Kirsch, Louise P.
name: Fotopoulou, Aikaterini
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 179999 Psychology and Cognitive Sciences not elsewhere classified
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Supplementary Results, Tables and Figures
A resilience glossary shaped by context: Reviewing resilience-related terms for critical infrastructures
Creators: name: Mentges, Andrea
name: Halekotte, Lukas
name: Schneider, Moritz
name: Demmer, Tobias
name: Lichte, Daniel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We present a comprehensive resilience glossary, comprising a set of 91 definitions of resilience-related terms used in the context of critical infrastructures. The definition and use of many of these terms, as well as the term resilience itself, shows an enormous variability in the literature. Therefore, we draw from the diverse pool of published definitions, integrate multiple contrasting views, compare the individual terms, and provide references to adjoining or contesting views, to create a clear resilience terminology. This terminology outlines a specific understanding of resilience which supports the effective assessment and management of the resilience of critical infrastructures. The two central elements of this understanding are that (1) resilience is the ability of a system to deal with the impacts of unspecific and possibly unforeseen disruptive events, and that (2) this ability comprises three pillar capacities whose quality can be extracted from performance curves.
description: 55 pages, 4 figures
Luminescent properties of Bi-doped polycrystalline KAlCl4
Creators: name: Veber, A. A.
name: Romanov, A. N.
name: Usovich, O. V.
name: Fattakhova, Z. T.
name: Haula, E. V.
name: Korchak, V. N.
name: Trusov, L. A.
name: Kazin, P. E.
name: Sulimov, V. B.
name: Tsvetkov, V. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We observed an intensive near-infrared luminescence in Bi-doped KAlCl4 polycrystalline material. Luminescence dependence on the excitation wavelength and temperature of the sample was studied. Our experimental results allow asserting that the luminescence peaked near 1 um belongs solely to Bi+ ion which isomorphically substitutes potassium in the crystal. It was also demonstrated that Bi+ luminescence features strongly depend on the local ion surroundings.