cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Jointly Managing Electrical and Thermal Energy in Solar- and Battery-powered Computer Systems
Creators: name: Bashir, Noman
name: Chandio, Yasra
name: Irwin, David
name: Anwar, Fatima M.
name: Gummeson, Jeremy
name: Shenoy, Prashant
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Computers and Society (cs.CY)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Environmentally-powered computer systems operate on renewable energy harvested from their environment, such as solar or wind, and stored in batteries. While harvesting environmental energy has long been necessary for small-scale embedded systems without access to external power sources, it is also increasingly important in designing sustainable larger-scale systems for edge applications. For sustained operations, such systems must consider not only the electrical energy but also the thermal energy available in the environment in their design and operation. Unfortunately, prior work generally ignores the impact of thermal effects, and instead implicitly assumes ideal temperatures. To address the problem, we develop a thermodynamic model that captures the interplay of electrical and thermal energy in environmentally-powered computer systems. The model captures the effect of environmental conditions, the system's physical properties, and workload scheduling on performance. In evaluating our model, we distill the thermal effects that impact these systems using a small-scale prototype and a programmable incubator. We then leverage our model to show how considering these thermal effects in designing and operating environmentally-powered computer systems of varying scales can improve their energy-efficiency, performance, and availability.
description: The 14th ACM International Conference on Future Energy Systems (e-Energy '23), June 20--23, 2023, Orlando, FL, USA
A Computational Literature Analysis of Conversational AI and Chatbots With a Focus on Coaching
Creators: name: Pande, Charuta
Publisher: name: Zenodo
Year: 2022

description: Conversational AI is an interdisciplinary field of research that involves studies on conversational agents, commonly called as chatbots. This master thesis provides quantitative evidence of an increasing interest in this research field. The thesis identifies the top venues where Conversational AI research has been published between 2016 and 2020. Additionally, this research presents the results of computational literature analysis of research publications on conversational agents from two scientific databases. Through the computational technique of topic modeling using the Latent Dirichlet Allocation algorithm, nine prominent topics in Conversational AI publications were identified, two of which are related to the domain of coaching. By performing author analysis, key contributors to the field of Conversational AI and more specifically in the domain of coaching were identified. From the affiliations, it was observed that authors from Europe have a prominent contribution in this research area. Based on the findings from the literature, a research agenda has been proposed to continue future research in Conversational AI and the domain of coaching.
The Relationship Between Molecular Gas and Star Formation in Low-Mass E/S0 Galaxies
Creators: name: Wei, Lisa H.
name: Vogel, Stuart N.
name: Kannappan, Sheila J.
name: Baker, Andrew J.
name: Stark, David V.
name: Laine, Seppo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider the relationship between molecular-gas and star-formation surface densities in 19 morphologically defined E/S0s with stellar mass
description: ApJL, accepted, 16 pages with 3 color figures, 2 tables
Analysis and Design of Ultra Thin Electromagnetic Absorbers Comprising Resistively Loaded High Impedance Surfaces
Creators: name: Costa, Filippo
name: Monorchio, Agostino
name: Manara, Giuliano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: High-Impedance Surfaces (HIS) comprising lossy Frequency Selective Surfaces (FSS) are employed to design thin electromagnetic absorbers. The structure, despite its typical resonant behavior, is able to perform a very wideband absorption in a reduced thickness. Losses in the frequency selective surface are introduced by printing the periodic pattern through resistive inks and hence avoiding the typical soldering of a large number of lumped resistors. The effect of the surface resistance of the FSS and dielectric substrate characteristics on the input impedance of the absorber is discussed by means of a circuital model. It is shown that the optimum value of surface resistance is affected both by substrate parameters (thickness and permittivity) and by FSS element shape. The equivalent circuit model is then used to introduce the working principles of the narrowband and the wideband absorbing structure and to derive the best-suited element for wideband absorption. Finally, the experimental validation of the presented structures is presented.
description: 8 pages, 10 figures
Curvature and torsion in graded geometry
Creators: name: Φωτιάδης, Αναστάσιος Αποστόλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Καμπυλότητα και στρέψη
Βαθμωτή γεωμετρία
Courant αλγεβροειδή
Curvature and torsion
Graded geometry
Courant algebroids

description: Network security is vital to protect against unauthorized access, data breaches and malicious attacks. Authentication, encryption, network segmentation, monitoring, regular updates, physical security and user education are critical elements of a comprehensive WLAN security strategy. By implementing these measures, organizations can create a secure wireless environment that protects sensitive data, ensures network integrity, and promotes secure and reliable wireless connectivity. User awareness and education are key elements of WLAN security. Users should be educated about the risks associated with wireless networks, such as the importance of avoiding unsecure networks and being cautious when exchanging sensitive information over a wireless LAN. By promoting safe browsing habits, intensive training on attacks and providing guidelines for safe network use, organizations can raise awareness among users to actively contribute to network security
description: Η ασφάλεια των δικτύων WLAN είναι ζωτικής σημασίας για την προστασία από µη εξουσιοδοτημένη πρόσβαση, παραβιάσεις δεδομένων και κακόβουλες επιθέσεις. Η πιστοποίηση ταυτότητας, η κρυπτογράφηση, η τμηματοποίηση του δικτύου, η παρακολούθηση, οι τακτικές ενημερώσεις, η φυσική ασφάλεια και η εκπαίδευση των χρηστών αποτελούν κρίσιμα στοιχεία μιας ολοκληρωμένης στρατηγικής ασφάλειας WLAN. Με την εφαρμογή αυτών των μέτρων, οι οργανισμοί μπορούν να δημιουργήσουν ένα ασφαλές ασύρματο περιβάλλον που προστατεύει τα ευαίσθητα δεδομένα, διασφαλίζει την ακεραιότητα του δικτύου και προωθεί την ασφαλή και αξιόπιστη ασύρματη συνδεσιμότητα. Η ευαισθητοποίηση και η εκπαίδευση των χρηστών αποτελούν βασικά στοιχεία της ασφάλειας WLAN. Οι χρήστες θα πρέπει να εκπαιδεύονται σχετικά µε τους κινδύνους που συνδέονται µε ασύρματα δίκτυα, όπως η σημασία της αποφυγής µη ασφαλών δικτύων και της επιφυλακτικότητας κατά την ανταλλαγή ευαίσθητων πληροφοριών µέσω ενός ασύρματου τοπικού δικτύου. Με την προώθηση ασφαλών συνηθειών περιήγησης, την εντατική επιμόρφωση σχετικά µε τις επιθέσεις και την παροχή κατευθυντήριων γραμμών για την ασφαλή χρήση του δικτύου, οι οργανισμοί µμπορούν να ευαισθητοποιήσουν τους χρήστες ώστε να συμβάλλουν ενεργά στην ασφάλεια του δικτύου.
The integrated density of states of the random graph Laplacian
Creators: name: Aspelmeier, T.
name: Zippelius, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We analyse the density of states of the random graph Laplacian in the percolating regime. A symmetry argument and knowledge of the density of states in the nonpercolating regime allows us to isolate the density of states of the percolating cluster (DSPC) alone, thereby eliminating trivially localised states due to finite subgraphs. We derive a nonlinear integral equation for the integrated DSPC and solve it with a population dynamics algorithm. We discuss the possible existence of a mobility edge and give strong evidence for the existence of discrete eigenvalues in the whole range of the spectrum.
description: 4 pages, 1 figure. Supplementary material available at http://www.theorie.physik.uni-goettingen.de/~aspel/data/spectrum_supplement.pdf
The nature of assembly bias - I. Clues from a LCDM cosmology
Creators: name: Lacerna, Ivan
name: Padilla, Nelson
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new proxy for the overdensity peak height for which the large-scale clustering of haloes of a given mass does not vary significantly with the assembly history. The peak height, usually taken to be well represented by the virial mass, can instead be approximated by the mass inside spheres of different radii, which in some cases can be larger than the virial radius and therefore include mass outside the individual host halo. The sphere radii are defined as r = $a$ delta_t + $b$ log_10(M_vir/M_nl), where delta_t is the age relative to the typical age of galaxies hosted by haloes with virial mass M_vir, M_nl is the non-linear mass, and $a$=0.2 and $b$=-0.02 are the free parameters adjusted to trace the assembly bias effect. Note that $r$ depends on both halo mass and age. In this new approach, some of the objects which were initially considered low-mass peaks belong to regions with higher overdensities. At large scales, i.e. in the two-halo regime, this model properly recovers the simple prescription where the bias responds to the height of the mass peak alone, in contrast to the usual definition (virial mass) that shows a strong dependence on additional halo properties such as formation time. The dependence on the age in the one-halo term is also remarkably reduced. The population of galaxies whose "peak height" changes with this new definition consists mainly of old stellar populations and are preferentially hosted by low-mass haloes located near more massive objects. The latter is in agreement with recent results which indicate that old, low-mass haloes would suffer truncation of mass accretion by nearby larger haloes or simply due to the high density of their surroundings, thus showing an assembly bias effect. The change in mass is small enough that the Sheth et al. (2001) mass function is still a good fit to the resulting distribution of new masses.
description: 13 pages, 10 figures, submitted to MNRAS, comments welcome
On the Impact of Outlier Bias on User Clicks
Creators: name: Sarvi, Fatemeh
name: Vardasbi, Ali
name: Aliannejadi, Mohammad
name: Schelter, Sebastian
name: de Rijke, Maarten
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: User interaction data is an important source of supervision in counterfactual learning to rank (CLTR). Such data suffers from presentation bias. Much work in unbiased learning to rank (ULTR) focuses on position bias, i.e., items at higher ranks are more likely to be examined and clicked. Inter-item dependencies also influence examination probabilities, with outlier items in a ranking as an important example. Outliers are defined as items that observably deviate from the rest and therefore stand out in the ranking. In this paper, we identify and introduce the bias brought about by outlier items: users tend to click more on outlier items and their close neighbors. To this end, we first conduct a controlled experiment to study the effect of outliers on user clicks. Next, to examine whether the findings from our controlled experiment generalize to naturalistic situations, we explore real-world click logs from an e-commerce platform. We show that, in both scenarios, users tend to click significantly more on outlier items than on non-outlier items in the same rankings. We show that this tendency holds for all positions, i.e., for any specific position, an item receives more interactions when presented as an outlier as opposed to a non-outlier item. We conclude from our analysis that the effect of outliers on clicks is a type of bias that should be addressed in ULTR. We therefore propose an outlier-aware click model that accounts for both outlier and position bias, called outlier-aware position-based model ( OPBM). We estimate click propensities based on OPBM ; through extensive experiments performed on both real-world e-commerce data and semi-synthetic data, we verify the effectiveness of our outlier-aware click model. Our results show the superiority of OPBM against baselines in terms of ranking performance and true relevance estimation.
description: Accepted at SIGIR'23, Full Paper Track
Landau Level Broadening and Van Hove Singularities in Lateral Surface Superlattices
Creators: name: Weiss, Dieter
name: Klitzing, Klaus von
name: Ploog, K.
name: Weimann, G.
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 530 Physik

description: A lateral periodic submicrometer potential in one direction superimposed on a two- dimensional electron gas (2DEG) lifts the degeneracy of the Landau levels (LL\'s) and leads to modulation broadened Landau bands. Due to the new band structure, singularities in the density of states (DOS) are expected which should result in a double peaked structure of the LL\'s (Van Hove singularities). Increasing the modulation amplitude of the periodic potential we observe a splitting of the Shubnikov-de Haas (SdH) maxima in magnetoresistance measurements which we believe to be the first observation of van Hove singularities in such modulated systems. In addition we report magnetotransport experiments in a weak two-dimensional periodic potential
Displacement flows of foamed cement in primary cementing of oil and gas wells
Creators: name: Rahimzadeh Hanachi, Nikoo
Publisher: name: University of British Columbia
Year: 2018

description: The idea of using foamed cement, which is essentially a bubbly liquid cement slurry, in the procedure of primary cementing of oil and gas wells is to have control over the density and be able to have lighter cements. However, some complications arise from the liquid-gas (compressible) mixture. First, there is an ongoing concern about the stability of the foamed slurry, e.g. as was queried in the enquiry into the 2010 BP Macondo incident. Secondly, there are questions regarding how the rheology of the foamed slurry should be modelled. Thirdly, there are questions regarding the stability of the placement flow itself, i.e. assuming that the foamed slurry itself remains intact. Here we have developed two preliminary models of primary cementing that include foamed cements. A one-dimensional hydraulic flow model is derived for displacement of foam flow inside the casing and annulus. In the annular region outside the casing, we modify the model developed to model laminar displacement flows of incompressible fluid, via a two-dimensional gap-averaged model. The main differences of our model compared to an incompressible fluid displacement are: (i) flow in our case is represented with a mass-flux stream function. (ii) density and rheological properties of foam are pressure dependent. Numerical simulation of displacement flows using the resulting model show that the annular flow exhibits buoyancy driven instabilities in many situations as the foam advances up the annulus.
Axinos in Cosmology and at Colliders
Creators: name: Freitas, Ayres
name: Steffen, Frank Daniel
name: Tajuddin, Nurhana
name: Wyler, Daniel
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The axino, the fermionic superpartner of the axion, is a well-motivated candidate for cold dark matter if it is the lightest supersymmetric particle. Since the axino couples very weakly to the matter multiplets, the next-to-lightest supersymmetric particle (NLSP) has a long lifetime, which has important consequences for both cosmology and collider phenomenology. Assuming that a charged slepton is the NLSP, we calculate the complete leading one- and two-loop contributions to its decay. We analyze in detail constraints on the parameters space from cosmology and discuss how this scenario can be probed at colliders. Scenarios in which both the axino and the gravitino are lighter than the long-lived charged slepton are also explored with particular emphasis on cosmological constraints and collider phenomenology.
description: 64 pages, 22 figures
Το απόρρητο των τηλεπικοινωνιών και οι νόμιμοι λόγοι άρσης του στον αντίποδα της προστασίας της ιδιωτικής ζωής. Είναι νόμιμη η χρήση λογισμικών παρακολούθησης προσώπων από κρατικούς φορείς κατ’ επίκληση λόγων εθνικής ασφάλειας;
Creators: name: Γιάννη, Μαρίνα Γεωργία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Απόρρητο
Τηλεπικοινωνίες
Λογισμικά Παρακολούθησης
Privacy
Telecommunications
Surveillance Software

description: Σκοπός της παρούσας διπλωματικής εργασίας συνιστά μία απόπειρα ανάδειξης της σπουδαιότητας του απορρήτου των επικοινωνιών, των διαδικασιών που ακολουθούνται προκειμένου να επιτευχθεί νόμιμα η άρση αυτού και να διερευνηθούν οι σκοποί που εξυπηρετεί. Περαιτέρω, εξετάσθηκε διεξοδικά το μείζονος σημασίας ζήτημα, που αφορά στη σύγκρουση των δικαιωμάτων που ανακύπτει στις περισσότερες εκ των περιπτώσεων άρσης του απορρήτου επικοινωνιών, με χρήση νομολογιακών παραδειγμάτων, τα οποία θα συνεισφέρουν στη τεκμηρίωση της νομικής ανάλυσης που θα λάβει χώρα. Συγχρόνως, κατόπιν της θερμής επικαιρότητας αναφορικά με την υπόθεση της πρόσφατης παρακολούθησης αρχηγού πολιτικού κόμματος από την Εθνική Υπηρεσία Πληροφοριών, επιχειρήθηκε η παρουσίαση και η ανάλυση πρακτικών που ακολουθούνται από διάφορους κρατικούς φορείς, οι οποίες διαφαίνεται ότι εκφεύγουν από τις νόμιμες εξαιρέσεις, με την παράθεση παραδειγμάτων χρήσης λογισμικών παρακολούθησης από κρατικούς φορείς.
description: The aim of the present thesis was an attempt to highlight the importance of the privacy of communications, the procedures followed in order to legally achieve its removal and to investigate the purposes it serves. Furthermore, the major conflict of rights issue that arises in most communications declassification cases was examined in detail, using case law examples, which will contribute to the legal analysis that will take place. At the same time, following the hot news regarding the case of the recent surveillance of a political party leader by the National Intelligence Service, an attempt has been made to present and analyze practices followed by various government agencies, which appear to escape the legal exceptions, by providing examples of the use of tracking software from government agencies.
Influence of the depletion length on the commensurability effects in tunable antidots
Creators: name: Deruelle, T.
name: Meurer, B.
name: Guldner, Y.
name: Vieren, J.
name: Riek, M.
name: Weiss, Dieter
name: Klitzing, K. v.
name: Eberl, K.
name: Ploog, K.
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: 530 Physik
subject: 72.20.My
subject: 73.20.Dx
subject: 73.40.Kp

description: Commensurability effects between the period of an artificial array of scatterers (antidots) in a two-dimensional electron gas and the classical cyclotron radius are found to depend strongly on the size of the antidots in comparison with the period. Magnetotransport experiments on tunable antidot arrays are reported and analyzed. In the region of large depletion zones we find strong deviations of the Hall effect from the Drude slope in magnetic fields up to several teslas. From this, we deduce undepleted regions of less than 60 nm in typical 500-nm period structures. The suppression of the commensurability motion around several antidots observed in the longitudinal magnetoresistance in the case of strong depletion has the same origin and allows us to determine independently and consistently the depletion radius of the antidots.
title: Goniomitrium acuminatum subsp. enerve
title: Version 1
titleType: Subtitle
Creators: name: Fife, Allan J.
Publisher: name: Bryophytes of Australia
Year: 2019
Subjects: Goniomitrium acuminatum subsp. enerve

description: Taxonomic treatment for Goniomitrium acuminatum subsp. enerve
Using membrane-supported liquid–liquid extraction for the measurement of extraction kinetics
Creators: name: Riedl, Wolfgang
name: Mollet, Daniel
name: Grundler, Gerhard
Publisher: name: Swiss Chemical Society
Year: 2011
Subjects: subject: Caprolactam
subject: Diffusion coefficient
subject: Membrane extraction
subject: Overall mass transfer coefficient
subject: 500 - Naturwissenschaften

description: Membrane-supported liquid–liquid extraction uses artificial membranes for the generation of a phase interface between the two liquid phases involved in extraction. Additional equipment for the generation of droplets as well as phase separation afterwards is no longer necessary. Since the membranes used for this special type of extraction are quite well described concerning thickness, porosity, tortuosity and material it is possible to generate information about the diffusion coefficient of the component to be extracted within the preferred solvent from extraction trails easily. This article describes an experimental set-up for both the proof of principle of membrane-supported liquid–liquid extraction and, using a dedicated computer-aided data treatment, how to calculate the overall mass transfer coefficient as well as the diffusion coefficient for a given system within moderate testing duration.
HPLC-PDA-ESI-MSn profiling of polyphenolics in different parts of Capparis spinosa and Capparis decidua as function of harvesting seasons
Creators: name: Gull, Tehseen
name: Sultana, Bushra
name: Anwar, Farooq
name: Nouman, Wasif
name: Rosa, Eduardo Augusto Dos Santos
name: Domínguez-Perles, Raúl
Publisher: name: Journal of Applied Botany and Food Quality
Year: 2019

description: HPLC-PDA-ESI-MSn analysis of different parts such as stem bark, shoot, flower, fruit and root of Capparis spinosa (C. spinosa) and Capparis decidua (C. decidua), collected in rainy and dry seasons from the Cholistan desert of Pakistan, depicted the occurrence of a wide array of phenolics with quercetin, apigenin and kaempferol derivatives along with dicaffeoylquinic acid, caffeoylquinic acid and feruloylquinic acid as the main compounds. Kaempferol-3-glucoside (28.02-167.21 μg g-1dw) was found to be the principal component in all tested parts of both species while dicaffeoylquinic acid was detected only in the flowers and roots. The roots exhibited maximum contents of flavonoids and hydroxycinnamic acid derivatives. The harvesting period significantly (p<0.05) affected the concentration of phenolics wherein the samples collected in rainy season offered greater levels of phenolics than their counterpart. The roots and fruits of both species were found to be rich sources of phenolics. The findings of this research suggest the harvesting of the selected wild Capparis species in rainy season to maximize their antioxidant and nutraceutical benefits.
description: Journal of Applied Botany and Food Quality, Vol 92 (2019): Journal of Applied Botany and Food Quality
Finish the eulogy, Brazil : a call for the end of the subject
Creators: name: Daher, Pedro
Publisher: name: University of British Columbia
Year: 2018

description: Difference speaks. This much can be readily assessed when one surveys the global politicaleconomic landscape. In the context of the Americas, difference screams; whether from black or indigenous populations (or other marginalized and subjugated communities), their words have been receiving some attention in the era of widespread faith in Liberalism. The goal of this thesis is to interrogate what difference has meant, what it means, and what it can mean. By reviewing major works that tried to rearticulate difference in the 20th century and tracing the construction of the current global reality through the articulation of the Modern Subject through difference, this work seeks to provide a critical account of how difference is deployed today, why it still means violence, and why it can only signify death and dispossession while it is articulated through differentiation. Finally, this thesis argues that something else is possible. That is, it postulates that difference can be something other than differentiation and self-determination. By engaging philosophy and critical race theory, I hope to excavate what lies within difference. I also examine two recent cases of violence in Brazil against its always already subjugated people - namely, black and indigenous populations. Finally, I propose that a shift in how difference is thought about, conceived of, perceived, and experienced is possible. To argue for this change, I try to show that reality actually means something else through quantum physics, indigenous thought, and critical theory works which call for the release of imagination and from certainty. With this, I hope to reflect and provide help for the project of social justice.
Ionization potentials of crystalline organic thin films: Position dependence due to molecular shape and charge redistribution
Creators: name: Topham, Benjamin J.
name: Kumar, Manoranjan
name: Soos, Zoltán G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In addition to electronic polarization or charge redistribution, the shape of neutral conjugated molecules yields position-dependent ionization potentials and electron affinities in organic thin films. Self-consistent I(n) and A(n) are computed in each layer n of 10-layer films of prototypical organics on a metal. The depth dependence of I(n) is discussed at surfaces of anthracene, C60 and PTCDA. The shape contribution can be substantial, up to 0.5 eV, and comes primarily from charge-quadrupole interactions.
description: 13 pages, 4 figures, Accepted in Chem. Phys. Letters
Anti-inflammatory coumarins from Paramignya trimera
Creators: name: Anh, Hoang Le Tuan
name: Kim, Dong-Cheol
name: Wonmin Ko
name: Ha, Tran Minh
name: Nguyen Xuan Nhiem
name: Pham Hai Yen
name: Bui Huu Tai
name: Truong, Luu Hong
name: Long, Vu Ngoc
name: Gioi, Tran
name: Quang, Tran Hong
name: Van Minh, Chau
name: Hyuncheol Oh
name: Youn-Chul Kim
name: Van Kiem, Phan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified

description: Context:Paramignya trimera (Oliv.) Burkill (Rutaceae) has been used to treat liver diseases and cancer. However, the anti-inflammatory effects of this medicinal plant and its components have not been elucidated. Objective: This study investigated chemical constituents of the P. trimera stems and evaluated anti-inflammatory effects of isolated compounds. Materials and methods: Cytotoxicity of isolated compounds (5–40 μM) toward BV2 cells was tested using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) for 24 h. Inhibitory effects of isolated compounds (5-40 μM) on nitrite and PGE2 concentrations were determined using Griess reaction and PGE2 ELISA kit, respectively (pretreated with the compounds for 3 h and then stimulated for 18 h with LPS). Inhibitory effects of compounds (5-40 μM) on iNOS and COX-2 protein expression were evaluated by Western blot analysis (pretreated with the compounds for 3 h and then stimulated for 24 h with LPS). Results: Seven coumarins were isolated and identified as: ostruthin (1), ninhvanin (2), 8-geranyl-7-hydroxycoumarin (3), 6-(6′,7′-dihydroxy-3′,7′-dimethylocta-2′-enyl)-7-hydroxycoumarin (4), 6-(7-hydroperoxy-3,7-dimethylocta-2,5-dienyl)-7-hydroxycoumarin (5), 6-(2-hydroxyethyl)-2,2-dimethyl-2H-1-benzopyran (6), and luvangetin (7). Compounds 1–4 and 7 inhibited NO and PGE2 production in LPS-stimulated BV2 cells, with IC50 values ranging from 9.8 to 46.8 and from 9.4 to 52.8 μM, respectively. Ostruthin (1) and ninhvanin (2) were shown to suppress LPS-induced iNOS and COX-2 protein expression. Discussion and conclusion: The present study provides a scientific rationale for the use of P. trimera in the prevention and treatment of neuroinflammatory diseases. Ostruthin and ninhvanin might have potential therapeutic effects and should be considered for further development as new anti-neuroinflammatory agents.
Effect of harvest date on yield and secondary compounds of lemon balm (Melissa officinalis L.)
Creators: name: Németh-Zámboriné, Éva
name: Seidler-Łożykowska, Katarzyna
name: Szabó, Krisztina
Publisher: name: Journal of Applied Botany and Food Quality
Year: 2019

description: The quality of the drug of lemon balm (Melissa officinalis L.) is influenced by several factors, among which the effect of ontogenesis has practically not been studied before. Five varieties (‘Lorelei’, ‘Lemona’, ‘Quedlinburger Niederliegende,’, ‘Gold Leaf’, ‘Soroksár’) were sampled at vegetative, budding, full flowering and after flowering phases at two locations (Budapest and Poznań) and their dried leaves analysed.
The accumulation of volatile compounds showed maximum values (0.08-0.46 ml/100 g dry weight) in budding phase (Budapest) or during flowering (Poznań). The content of total phenolics was highest (226-431 mg gallic acid equivalent/g dry weight) in vegetative stage and in some cases similar values were measured until budding. After a sharp decrease at flowering time in several cases, a second peak was detected at the end of the vegetation period. Similarly to the total phenolics, also the total flavonoid content reached the highest level (0.239-1.152% dry weight) at the first half of the vegetation period however, with characteristic differences between habitats.
In cultivation, the highest essential oil content may be reached later than highest polyphenol content, however harvesting at budding time may assure a good quality from both aspects with advantageous fresh and drug yields. The described dynamics of the accumulation of the investigated secondary metabolites was depending more on the habitat and less from the cultivar.
description: Journal of Applied Botany and Food Quality, Vol 92 (2019): Journal of Applied Botany and Food Quality
Quantum phase transitions in coupled two-level atoms in a single-mode cavity
Creators: name: Chen, Qing-Hu
name: Liu, Tao
name: Zhang, Yu-Yu
name: Wang, Ke-Lin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dipole-coupled two-level atoms(qubits) in a single-mode resonant cavity is studied by extended bosonic coherent states. The numerically exact solution is presented. For finite systems, the first-order quantum phase transitions occur at the strong interatomic interaction. Similar to the original Dicke model, this system exhibits a second-order quantum phase transition from the normal to the superradiant phases. Finite-size scaling for several observables, such as the average fidelity susceptibility, the order parameter, and concurrence are performed for different interatomic interactions. The obtained scaling exponents suggest that interatomic interactions do not change the universality class.
description: 13 pages, 5 figures
Estimating the Density Ratio between Distributions with High Discrepancy using Multinomial Logistic Regression
Creators: name: Srivastava, Akash
name: Han, Seungwook
name: Xu, Kai
name: Rhodes, Benjamin
name: Gutmann, Michael U.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Functions of the ratio of the densities $p/q$ are widely used in machine learning to quantify the discrepancy between the two distributions $p$ and $q$. For high-dimensional distributions, binary classification-based density ratio estimators have shown great promise. However, when densities are well separated, estimating the density ratio with a binary classifier is challenging. In this work, we show that the state-of-the-art density ratio estimators perform poorly on well-separated cases and demonstrate that this is due to distribution shifts between training and evaluation time. We present an alternative method that leverages multi-class classification for density ratio estimation and does not suffer from distribution shift issues. The method uses a set of auxiliary densities $\{m_k\}_{k=1}^K$ and trains a multi-class logistic regression to classify the samples from $p, q$, and $\{m_k\}_{k=1}^K$ into $K+2$ classes. We show that if these auxiliary densities are constructed such that they overlap with $p$ and $q$, then a multi-class logistic regression allows for estimating $\log p/q$ on the domain of any of the $K+2$ distributions and resolves the distribution shift problems of the current state-of-the-art methods. We compare our method to state-of-the-art density ratio estimators on both synthetic and real datasets and demonstrate its superior performance on the tasks of density ratio estimation, mutual information estimation, and representation learning. Code: https://www.blackswhan.com/mdre/
Versioning of published articles in OJS 3
Creators: name: Lilienthal, Svantje
Publisher: name: Zenodo
Year: 2017
Subjects: ojs
pkp
versioning
ojsdenet

description: The option to publish multiple versions of one research paper, while maintaining the original version and allowing for a version history, is a much seeked-after feature for open access publishing. OJS did not support this kind of agile publishing - until now. The German OJS network project OJS-de.net has created a solution to add versioning of published articles in OJS 3. In this lightning talk, I will briefly outline the main functions of the new versioning feature, while also mentioning some of the complex workflow decision that had to be made while designing and developing it.

We decided to implement an option to centrally enable or disable versioning for the entire journal. Once activated, the editors can outline their versioning policy in the "About" section of the journal. The design of the versioning workflow is similar to the concept of review rounds and new article versions can be created by the push of a button. Once a new version is created, older versions cannot be edited anymore, in order to encourage editors to transparently label all changes in an article - rather than just changing an existing article, like before. Versions are linked at the article page under the heading “version history” and the corresponding metadata and files are displayed at its own page, while old versions have a notice and a link to the recent version.
Piqueria trinervia as a source of metabolites against Giardia intestinalis
Creators: name: Rufino-González, Yadira
name: Ponce-Macotela, Martha
name: Jiménez-Estrada, Manuel
name: Jiménez-Fragoso, Candy N.
name: Palencia, Guadalupe
name: Sansón-Romero, Gabriel
name: Anzo-Osorio, Anahi
name: Martínez-Gordillo, Mario N.
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Context:Piqueria trinervia Cav. (Asteraceae) is a plant species with a long history in traditional medicine to cure diarrhoea and other digestive disorders. Objective: The study investigates the antigiardial activity of piquerol, trinervinol, red oil and two fractions (F1 and F2) from P. trinervia. Materials and methods:P. trinervia was collected in the Ajusco in Mexico City. Aerial parts were ground and mixed with water to obtain the extract, which was treated with dichloromethane to isolate piquerol and trinervinol (P & T). Remnants were the red oil, fractions 1 and 2 (RO, F1 & F2). Trophozoites of Giardia intestinalis were treated with P, T, RO, F1 and F2 at different concentrations (0.78–200 μg/mL) for 48 h. Antigiardial activity was measured using the methylene blue reduction, and the cytotoxicity assayed on human fibroblasts and Vero cells by reduction of tetrazolium salts. Results: Trinervinol and piquerol showed antigiardial activity with an IC50 = 2.03 and 2.42 μg/mL, and IC90 = 13.03 and 8.74 μg/mL, respectively. The concentrations of trinervinol (CC50 = 590 μg/mL) and piquerol (CC50 = 501 μg/mL) were not cytotoxic to human fibroblasts. Conclusions: Compounds from P. trinervia showed antigiardial activity; to enhance this activity, piquerol and trinervinol can be chemically modified.
Particle Physics Implications for CoGeNT, DAMA, and Fermi
Creators: name: Buckley, Matthew R.
name: Hooper, Dan
name: Tait, Tim M. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent results from the CoGeNT collaboration (as well as the annual modulation reported by DAMA/LIBRA) point toward dark matter with a light (5-10 GeV) mass and a relatively large elastic scattering cross section with nucleons (σ~ 10^{-40} cm^2). In order to possess this cross section, the dark matter must communicate with the Standard Model through mediating particles with small masses and/or large couplings. In this Letter, we explore with a model independent approach the particle physics scenarios that could potentially accommodate these signals. We also discuss how such models could produce the gamma rays from the Galactic Center observed in the data of the Fermi Gamma Ray Space Telescope. We find multiple particle physics scenarios in which each of these signals can be accounted for, and in which the dark matter can be produced thermally in the early Universe with an abundance equal to the measured cosmological density.
description: 4 pages, 2 figures
Composite metamorphic relations for integration testing
Creators: name: Yakusheva, Sofia F.
name: Khritankov, Anton S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Metamorphic testing is a testing method for problems without test oracles. Integration testing allows for detecting errors in complex systems that may not be found during the testing of their components. In this paper, we propose a novel approach that applies metamorphic testing in integration testing. The main idea is to develop a composite metamorphic relation for the system represented as an acyclic graph. This relation is a logical function of metamorphic relations for the parts of the system (vertices of the graph). It takes into account the features of the parts. Also, it can simplify the search for failure by identifying the subsystem with error. In this paper's theoretical part, we describe an algorithm of relation design. Then, we apply our method to a bioinformatics system for comparative genetic analysis of tissues using production tools. This experiment proves our method can be applied to real-life pipelines and find errors in them.
description: 11 pages, 5 figures
РАЗВИТИЕ ТУРИЗМА В САМАРКАНДЕ В ГОДЫ НЕЗАВИСИМОСТИ
Creators: name: Абдураимова, М.Ш.
Publisher: name: Zenodo
Year: 2025

description: В данной статье представлена кодикология развития туристической отрасли в Самарканде и этапы развития, а также освещены сведения о традициях, памятниках культуры, святых местах паломничества.
Biophysical insights into the regulatory and DNA-binding mechanisms of the eukaryotic transcription factors Pax5 and Ets1
Creators: name: Perez-Borrajero, Cecilia
Publisher: name: University of British Columbia
Year: 2018

description: Transcription factors are proteins that bind at promoter and enhancer sites to regulate gene expression. In this thesis, I used NMR spectroscopy and other methods to investigate the structural and biophysical basis of DNA binding by two eukaryotic transcription factors that are crucial in the development of lymphocytes, Pax5 and Ets1. In chapter 2, I describe how the two subdomains comprising the bipartite DNA-binding Paired domain of Pax5 cooperate to mediate transcriptional regulation. The N-terminal subdomain recognizes DNA sequences in a highly specific manner, whereas the C-terminal subdomain shows little sequence discrimination. The more rigid C-terminal subdomain binds DNA primarily though non-specific electrostatic interactions. In contrast, association with specific DNAs by the dynamic N-terminal subdomain involves relatively large and compensating changes in enthalpy and entropy that point to structural rearrangements upon binding. I propose that the distinct behaviors of the subdomains allow the Pax5 protein to rapidly scan non-specific genomic DNA while retaining specificity for functional regulatory sites. In chapter 3, I expand our understanding of the structural and thermodynamic basis of Ets1 autoinhibition. Previously it was reported that an intrinsically disordered serine-rich region (SRR) interacts transiently with the adjacent ETS domain to attenuate DNA binding. Although forming a dynamic fuzzy complex, I was able to use NMR spectroscopy and X-ray crystallography to provide a detailed mechanism for this inhibitory interaction. In particular, I exploited a trans peptide system to show that the SRR uses a combination of electrostatic and hydrophobic-driven interactions to sterically block the ETS domain DNA-binding interface. I also show how phosphorylation of the SRR strengthens its association with the ETS domain. Altogether, these results explain how the activity of Ets1 is regulated at the level of DNA binding through post-translational modifications that impinge upon the SRR.
Equilibration Length of Electrons in Spin Polarized Edge Channels
Creators: name: Müller, G.
name: Weiss, Dieter
name: Khaetskii, A. V.
name: Klitzing, Klaus von
name: Koch, S.
name: Nickel, H.
name: Schlapp, W.
name: Lösch, R.
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 530 Physik
subject: 3.20.Dx
subject: 73.50.Jt
subject: 73.60.Br

description: We investigate experimentally the "mean free path" of electrons injected selectively into the outer spin-polarized edge channel of the lowest Landau level. A simple model allows us to determine the characteristic length between two spin-flip scattering events directly from the measured resistance plateaus. Typical spin-flip equilibration lengths between 100 ìm and 1 mm are found. The size of the observed equilibration lengths is interpreted in terms of the spin-orbit interaction, which also leads to a local g-factor enhancement at the edge.
A powerful computational crystallography method to study ice polymorphism
Creators: name: Cogoni, M.
name: D'Aguanno, B.
name: Kuleshova, L. N.
name: Hofmann, D. W. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Classical Molecular Dynamics (MD) simulations are employed as a tool to investigate structural properties of ice crystals under several temperature and pressure conditions. All ice crystal phases are analyzed by means of a computational protocol based on a clustering approach following standard MD simulations. The MD simulations are performed by using a recently published classical interaction potential for oxygen and hydrogen in bulk water, derived from neutron scattering data, able to successfully describe complex phenomena such as proton hopping and bond formation/breaking. The present study demonstrates the ability of the interaction potential model to well describe most ice structures found in the phase diagram of water and to estimate the relative stability of sixteen known phases through a cluster analysis of simulated powder diagrams of polymorphs obtained from MD simulations. The proposed computational protocol is suited for automated crystal structure identification.
description: RevTex 4.1, 7 figures - to be published in the Journal of Chemical Physics
Acute and sub-chronic toxicity of Cajanus cajan leaf extracts
Creators: name: Tang, Rong
name: Tian, Ru-Hua
name: Jia-Zhong Cai
name: Wu, Jun-Hui
name: Shen, Xiao-Ling
name: Hu, Ying-Jie
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology

description: Context: The leaves of Cajanus cajan (L.) Millsp. (Fabaceae) have diverse bioactivities, but little safety data are reported. Objective: This study examines the toxicological profiles of C. cajan leaf extracts. Materials and methods: The leaves were extracted by water or 90% ethanol to obtain water or ethanol extract (WEC or EEC). EEC was suspended in water and successively fractionated into dichloroform and n-butanol extracts (DEC and BEC). Marker compounds of the extracts were monitored by high-performance liquid chromatography (HPLC). Kunming mice were administered with a single maximum acceptable oral dose (15.0 g/kg for WEC, EEC and BEC and 11.3 g/kg for DEC) to determine death rate or maximal tolerated doses (MTDs). In sub-chronic toxicity investigation, Sprague–Dawley rats were orally given WEC or EEC at 1.5, 3.0 or 6.0 g/kg doses for four weeks and observed for two weeks after dosing to determine toxicological symptoms, histopathology, biochemistry and haematology. Results: Flavonoids and stilbenes in the extracts were assayed. In acute toxicity test, no mortality and noted alterations in weight and behavioural abnormality were observed, and the maximum oral doses were estimated as MTDs. In sub-chronic toxicity study, no mortality and significant variances in haematological and biochemical parameters or organ histopathology were observed, but increased kidney weight in 3.0 g/kg WEC- or 3.0 and 6.0 g/kg EEC-treated female rats, and reduced testes and epididymis weight in EEC-treated male rats were recorded. These changes returned to the level of control after recovery period. Conclusion: Acute and sub-chronic toxicity of Cajanus cajan  leaf extracts was not observed.