cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tachyonic de Sitter solutions of 10d type II supergravities
Creators: name: Andriot, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cosmological models of the early or late universe exhibit (quasi) de Sitter space-times with different stability properties. Considering models derived from string theory, the swampland program does not provide for now a definite characterisation of this stability. In this work we focus on de Sitter solutions of 10d type II supergravities, candidates for classical de Sitter string backgrounds: surprisingly, all known examples are unstable with $η_V < -1$. We aim at proving the existence of such a systematic tachyon, and getting formally a bound on the value of $η_V$. To that end, we develop three methods, giving us various sufficient conditions for having a tachyon upon assumptions, in analogy with de Sitter no-go theorems. Our analysis eventually indicates the existence of variety of different tachyons, and related bounds on $η_V$. We use this knowledge to find 10 new de Sitter solutions of type IIB supergravity, that have tachyons of a different kind, higher $η_V$ values and new 6d geometries. One solution even appears to be stable, with however non-compact extra dimensions.
description: v2: 31 pages + appendices; few additions, including references and 5 figures. A Mathematica Notebook is provided here as an ancillary file with all solutions of this paper arXiv:2101.06251, as well as those of arXiv:2005.12930
Light Induced Hall effect in semiconductors with spin-orbit coupling
Creators: name: Dai, Xi
name: Zhang, Fu-Chun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that optically excited electrons by a circularly polarized light in a semiconductor with spin-orbit coupling subject to a weak electric field will carry a Hall current transverse to the electric field. This light induced Hall effect is a result of quantum interference of the light and the electric field, and can be viewed as a physical consequence of the spin current induced by the electric field. The light induced Hall conductance is calculated for the p-type GaAs bulk material, and the n-type and p-type quantum well structures.
description: 5 pages, 3 figures
Low-Power IoT Communication Security: On the Performance of DTLS and TLS 1.3
Creators: name: Restuccia, Gabriele
name: Tschofenig, Hannes
name: Baccelli, Emmanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Similarly to elsewhere on the Internet, practical security in the Internet of Things (IoT) is achieved by combining an array of mechanisms, at work at all layers of the protocol stack, in system software, and in hardware. Standard protocols such as Datagram Transport Layer Security (DTLS 1.2) and Transport Layer Security (TLS 1.2) are often recommended to secure communications to/from IoT devices. Recently, the TLS 1.3 standard was released and DTLS 1.3 is in the final stages of standardization. In this paper, we give an overview of version 1.3 of these protocols, and we provide the first experimental comparative performance analysis of different implementations and various configurations of these protocols, on real IoT devices based on low-power microcontrollers. We show how different implementations lead to different compromises. We measure and compare bytes-over-the-air, memory footprint, and energy consumption. We show that, when DTLS/TLS 1.3 requires more resources than DTLS/TLS 1.2, this additional overhead is quite reasonable. We also observe that, in some configurations, DTLS/TLS 1.3 actually decreases overhead and resource consumption. All in all, our study indicates that there is still room to optimize the existing implementations of these protocols.
title: Drooniterrorismi tehnoloogiad, nende rakendamisviisid ja võimalikud kasutajad
Creators: name: Belova-Dalton, Oksana
name: Pärn, Tõnu
Publisher: name: Tallinn: Sisekaitseakadeemia
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: Tsiviildrooni kasutamine muutub järjest lihtsamaks. Samas on tsiviildrooni kättesaamine lihtne, näiteks saab seda internetis Hiina veebilehtedelt tellida. Siinne mõttepaber käsitleb drooniterrorismi tehnoloogiaid, nende rakendamisviise ning õimalikke ründajaid, kes võivad kasutada neid tehnoloogiaid Euroopas ja kitsamalt Eestis, keda nad võivad sihtida ja miks.
Võtmesõnad: droonid; terrorism
description: Sissejuhatus; Drooniterrorismi tehnoloogiad; Drooniterrorismi tehnoloogiate võimalikud rakendused, kitsaskohad ja kasutajad ; Kokkuvõte
description: Mõttepaber
title: Kosmosetehnoloogiate rakendamise võimalused siseministeeriumi haldusalas
Creators: name: Pärn, Tõnu
Publisher: name: Tallinn: Sisekaitseakadeemia
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences
classificationCode: 2.3
subject: FOS: Mechanical engineering

description: Kosmosetehnoloogiate kasutuselevõtt on küll juba toimunud, kuid samas on sellel valdkonnal suur rakenduspotentsiaal. Kosmosetehnoloogia kallidust silmas pidades ei võeta vaatluse alla võimalikke bespoke-lahendusi kosmoses paikneva riistvara osas ega mehitatud lende, vaid käsitletakse olemasolevaid või lähituleviku platvorme ning nende rakendamisvõimalusi: side, navigatsioon ja seire. Eraldi vaadeldakse seiretehnoloogiate rakendamist, seejuures pole keskseks küsimuseks mitte see, millist tehnoloogiat kasutada, vaid see, millist lisandväärtust on võimalik kosmosetehnoloogiate parema integreerimisega saavutada.
Märksõnad: kaugseire, sensorid, aegread, skaleeritavus, GNSS, side, kosmos, mehitamata süsteemid
description: Sissejuhatus ; 1. Siseministeeriumi valdkond ja kosmosetehnoloogiad ; 1.1. Side ; 1.2. Navigatsioon ; 1.3. Seire ; 1.4. Võimalikud arengud ; 2. Praktikad Siseministeeriumi valdkonnale lähedastest kosmosetehnoloogiate rakendamistest ; 2.1. Liiklusohutus ; 2.2. Kuritegevusevastane võitlus ; 2..3. Maa-alade järelevalve ; 2.4. Infrapunasatelliitide kasutamine ; 2.5. Õlisaaste otsimine merelt ; 2.6. SAR radaridetektorina ; 2.7. Erinevate platvormide kaugseire integreerimine ; Kokkuvõte
A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers
Creators: name: Jeandet, Antoine
name: Jolly, Spencer W.
name: Borot, Antonin
name: Bussière, Benoît
name: Dumont, Paul
name: Gautier, Julien
name: Gobert, Olivier
name: Goddet, Jean-Philippe
name: Gonsalves, Anthony
name: Leemans, Wim P.
name: Lopez-Martens, Rodrigo
name: Mennerat, Gabriel
name: Nakamura, Kei
name: Ouillé, Marie
name: Pariente, Gustave
name: Pittman, Moana
name: Püschel, Thomas
name: Sanson, Fabrice
name: Sylla, François
name: Thaury, Cédric
name: Zeil, Karl
name: Quéré, Fabien
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021

description: The investigation of spatio-temporal couplings (STCs) of broadband light beams is becoming a key topic for the optimization as well as applications of ultrashort laser systems. This calls for accurate measurements of STCs. Yet, it is only recently that such complete spatio-temporal or spatio-spectral characterization has become possible, and it has so far mostly been implemented at the output of the laser systems, where experiments take place. In this survey, we present for the first time STC measurements at different stages of a collection of high-power ultrashort laser systems, all based on the chirped-pulse amplification (CPA) technique, but with very different output characteristics. This measurement campaign reveals spatio-temporal effects with various sources, and motivates the expanded use of STC characterization throughout CPA laser chains, as well as in a wider range of types of ultrafast laser systems. In this way knowledge will be gained not only about potential defects, but also about the fundamental dynamics and operating regimes of advanced ultrashort laser systems.
title: Hübriidsõjad ja hübriidsed ohud: Kas nende kaardistamiseks oleks vaja andmebaasi?
Creators: name: Sazonov, Vladimir
Publisher: name: Tallinn: Sisekaitseakadeemia
Year: 2022
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: Global Terrorism Database (GDT), mis on loodud Marylandi ülikoolis (USA) ning sisaldab teavet riigisiseste ja rahvusvaheliste terrorirünnakute kohta terves maailmas ajavahemikul 1970–2019, käsitleb rohkem kui 200 000 juhtumit ja annab hea, kuid mitte ammendava ülevaate terroriaktidest (University of Maryland, 2021). Sellest andmebaasist võib leida vajalikku teavet enamiku terrorijuhtumite kohta, mis on leidnud aset viimase 50 aasta jooksul. See mõttepaber arutleb selle üle, kas sarnane hübriidsõdu ja hübriidseid ohte kaardistav andmebaas oleks asjakohane ning kas see võiks asuda Eestis ja kas seda võiks hallata näiteks Sisekaitseakadeemias asuv sisejulgeoleku instituut, kus tegeletakse julgeolekuküsimustega, sh uuritakse hübriidsõda, terrorismi, infosõda, radikaliseerumist jne.
description: Sissejuhatus ; 1. Mis on hübriidsõda? ; 2. Mis on hübriidoht? ; 3. Millised on hübriidsõja ja hübriidse ohu tunnused ja komponendid? ; 4. Hübriidsõdu ja hübriidseid ohte kaardistava andmebaasi vajadus
description: Sisekaitseakadeemia. Sisejulgeoleku instituut. Mõttepaberid
title: Foreign (terrorist) fighters and their families in Finland, Sweden, Latvia, Lithuania, (northwestern) Russia and their impact on Estonia
Creators: name: Belovba-Dalton, Oksana
Publisher: name: Tallinn: Estonian Academy of Security Sciences
Year: 2022
Subjects: classificationCode: 5
subject: FOS: Social sciences
classificationCode: 5.6
subject: FOS: Political science

description: Foreign terrorist fighters (the FTFs) or jihadist terrorists and their wives and children returning to their countries of origin after the fall of the ISIS caliphate in Syria has created a great pressure on the institutions of the EU member states. Revoking citizenship and leaving wives and children of FTFs in refugee camps leads to further radicalisation of these people, and they’re perishing in harsh conditions. Repatriation, however, puts returnees in a hazy status between national security threats and subjects of reintegration. Hence, interinstitutional, cross-sector and multi-agency cooperation is vital to deradicalise and reintegrate FTFs and their families, prosecute adults for committed offenses, and help children overcome the traumas they received during their time in ISIS. Keywords: internal security; terrorism; refugees
description: Introduction ; 1. Foreign (Terrorist) Fighters And Their Families: Background And Existing Response Measures ; 2. Foreign (Terrorist) Fighters And Their Families In Finland, Sweden, Latvia, Lithuania And (Northwestern) Russia ; 3. Impact Of The Situation With Foreign (Terrorist) Fighters And Their Families On Estonia ; Conclusion
Comment on 'Secure Communication using mesoscopic coherent states', Barbosa et al, Phys Rev Lett 90, 227901 (2003)
Creators: name: Yuan, Z. L.
name: Shields, A. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent letter, Barbosa et al [PRL 90, 227901(2003)] claim that secure communication is possible with bright coherent pulses, by using quantum noise to hide the data from an eavesdropper. We show here that the secrecy in the scheme of Barbosa et al is unrelated to quantum noise, but rather derives from the secret key that sender and receiver share beforehand.
Die Arbeit der Einheit 1 des ÖRK zwischen Vancouver und Canberra
Creators: name: Thorogood, Bernard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 3 (1990): Ökumenische Rundschau, Band 39, Heft 3
Peer Production and State Theory: Envisioning a Cooperative Partner State
Creators: name: Pazaitis, Alex
name: Drechsler, Wolfgang
Publisher: name: Zenodo
Year: 2020
Subjects: partner state
state theory
Hegel
Gramsci
peer production
open cooperativism

description: This chapter examines the concept of the Partner State, as a new form of symbiosis between state and civil society, based on the principles and practices of Peer Production. The general stance of Peer Production advocates is almost intrinsically anti-state. However, state theory arguably reveals that the examination of the state and its institutions actually helps us understand the position and potentials of Peer Production. A tentative union between Hegelian and Gramscian thought delineates why and how the State can, and arguably should, embrace and support Peer Production. Finally, a tentative framework for these prefigurative institutions is offered by Open Cooperativism.
Localization and function of UNC-52/perlecan isoforms in the nematode Caenorhabditis elegans
Creators: name: Mullen, Gregory Paul
Publisher: name: University of British Columbia
Year: 2009

description: The unc-52 gene encodes the nematode homolog of mammalian perlecan, the major heparan sulfate proteoglycan of the extracellular matrix (Rogalski et al., 1993). This protein has five domains, with similarity to the LDL-receptor (domain II), laminin (domains III and V), and the neural cell adhesion molecule (domain IV). We identified three major classes of protein products that arise through alternative splicing: short (domains I - III), medium (domains I - IV), and long (domains I - V) isoforms. Alternative splicing also generates diversity within domains III and IV (Rogalski et al., 1993, 1995). Immunolocalization studies indicate that UNC-52 is localized to basement membranes associated with contractile tissues in C. elegans. In addition, there are spatial and temporal differences in isoform localization. In embryos, short isoforms are associated with the pharynx and anal muscles, while domain IV-containing isoforms are associated with the body wall muscles. In adults, domain IV-containing isoforms become more widely distributed and are detected in basement membranes adjacent to most contractile tissues. Mutant studies indicate that domain IV-containing isoforms are essential for myofilament assembly in body wall muscles. In contrast, short isoforms are not required for myofilament lattice assembly in the pharyngeal muscles and their role in development remains unclear. Our results also suggest that alternative splicing within domain IV is associated with temporal changes in isoform expression. Recently, the mec-8 gene has been shown to encode a putative RNA-binding protein that regulates some of these splicing events (Lundquist et al., 1996). We characterized the interactions between unc-52 and mec-8, and present a model for temporal and qualitative control of isoform expression through mec-8 and a group of global regulators called heterochronic genes. Finally, we examined the distribution of perlecan in mutants lacking key muscle attachment proteins such as integrin, and our results suggest that perlecan acts upstream of membrane-associated components during muscle assembly.
Subharmonic gap structures and Josephson effect in MgB2/Nb micro-constrictions
Creators: name: Giubileo, Filippo
name: Aprili, Marco
name: Bobba, Fabrizio
name: Piano, Samanta
name: Scarfato, Alessandro
name: Cucolo, Anna Maria
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Superconducting micro-constrictions between Nb tips and high quality MgB$_{2}$ pellets have been realized by means of a point-contact inset, driven by a micrometric screw. Measurements of the current-voltage characteristics and of the dynamical conductance versus bias have been performed in the temperature range between 4.2 K and 500 K. Above the Nb critical temperature T$_{C}^{Nb}$, the conductance of the MgB$_2$/normal-metal constrictions behaves as predicted by the BTK model for low resistance contacts while high resistance junctions show quasiparticle tunneling characteristics. Consistently, from the whole set of data we infer the value $Δ_π = 2.5 \pm 0.2$ meV for the three-dimensional gap of MgB$_2$. Below T$_{C}^{Nb}$, low resistance contacts show Josephson current and subharmonic gap structures (SGS), due to multiple Andreev reflections. Simultaneous observations of both features, unambiguously indicate coupling of the 3D band of MgB$_2$ with the Nb superconducting order parameter. We found that the temperature dependence of the Josephson critical current follows the classical Ambegaokar-Baratoff behavior with a value $I_CR_N=(2.1 \pm 0.1)$ meV at low temperatures.
description: 8 pages, 5 figures. Replaced with published version
Crossing Symmetric Dispersion Relations for Mellin Amplitudes
Creators: name: Gopakumar, Rajesh
name: Sinha, Aninda
name: Zahed, Ahmadullah
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider manifestly crossing symmetric dispersion relations for Mellin amplitudes of scalar four point correlators in conformal field theories (CFTs). This allows us to set up the non-perturbative Polyakov bootstrap for CFTs in Mellin space on a firm foundation, thereby fixing the contact term ambiguities in the crossing symmetric blocks. Our new approach employs certain "locality" constraints replacing the requirement of crossing symmetry in the usual fixed-$t$ dispersion relation. Using these constraints we show that the sum rules based on the two channel dispersion relations and the present dispersion relations are identical. Our framework allows us to connect with the conceptually rich picture of the Polyakov blocks being Witten diagrams in anti-de Sitter (AdS) space. We also give two sided bounds for Wilson coefficients for effective field theories in AdS space.
description: V2: version to appear in Physical Review Letters
title: Eesti elanikkonna teadlikkus küberturvalisusest: ülevaade uuringutest ja võimalikest edasistest suundadest
Creators: name: Kont, Kate-Riin
Publisher: name: Sisekaitseakadeemia
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: Mõttepaber kaardistab teemad, mis on esile kerkinud seoses üha suurenevate küberohtudega   ettevõtete ja üksikisiku tasandil.
Siseturvalisuse avaliku arvamuse 2022. aasta uuring näitas, et kogu riiki puudutavatest ohuolukordadest peavad Eesti elanikud lähima kolme aasta jooksul kõige tõenäolisemaks küberrünnakut. Kui vaadata Eurobaromeetri uuringute trende aastatel 2012–2019, tekitab muret, et Eesti internetikasutajad ei vaheta piisava regulaarsusega oma võrguparoole ning vaid umbes 1/3 kasutab erinevaid paroole eri kontode jaoks. Kõige sagedasemad küberturvanõuete rikkumised on seotud inimlike vigadega, mida on võimalik vältida küberteadlikkust eri sihtgruppides regulaarselt hinnates-mõõtes ja selle põhjal erineva tasemega koolitusi korraldades.  Eesti riik on korraldanud mitmeid küberteadlikkuse suurendamise kampaaniaid ning välja töötanud strateegiaid, kus vähemal või rohkemal määral on paika pandud eesmärgid kasvatada nii elanike kui ka organisatsioonide teadlikkust küberkuritegevusega seotud ohtudest ja nendest hoidumise võimalustest.  Kokkuvõttes rõhutatakse olulisust keskenduda elanikkonna eri gruppide ning organisatsioonide töötajate infoturbe- ja küberturvalisusealaste teadmiste, hoiakute, oskuste ja tegeliku käitumise uurimisele ning vajadusele küberturvalisuse  lõimimiseks gümnaasiumide õppekavasse, et tagada küberteadlike kodanike järelkasv.
description: Eessõna ; 1. Küberturvalisus ja sellega seotud mõisted ; 2. Eesti riigi tegevused küberturvalisuse tagamisel ; 3. Elanikkonna küberturvalisuse teadlikkuse uuringud Euroopas ja mujal maailmas ; 4. Populaarsemad metoodikad küberteadlikkuse uurimiseks ; 5. Eestis tehtud küberturvalisuse teadlikkuse uuringud ; Kokkuvõte
description: Keywords: internal security; cyber security; cybersecurity; security
Microbial Ensemble in the Hives: Deciphering the Intricate Gut Ecosystem of Hive and Forager bees of Apis mellifera
Creators: name: M.N., Rudra Gouda
name: Sabtharishi, Subramanian
Publisher: name: Zenodo
Year: 2023

description: We obtained 25152063 paired reads from Illumina Miseq paired-end sequencing. The median length of the raw sequencing reads was 150. We processed these raw sequences using the freely available bioinformatics software, QIIME 2 version 2021.4.0. In brief, we imported demultiplexed forward and reverse reads into QIIME 2. We then used the DADA2 plugin to denoise (i.e. filter out noisy sequences, correct errors in marginal sequences, remove chimeric sequences/primer sequences, remove singletons, join denoised paired-end reads, and then dereplicate filtered sequences), and cluster sequences. Overall, 9523110 paired sequences with 62,855 assigned features passed the DADA2 quality filtering After filtering, an open-reference OTU picking process from qiime where reads are clustered against a reference sequence database (Green_genes_13_8_97) with 97% similarity and unmapped reads are clustered by de novo method. Further OTUs are classified using an alignment-based method classify-consensus-vsearch classifier. Overall, 22756 OTUs are assigned. All plots have been generated in the R ggplot2 package. Complex heatmap was used to create the heatmap. Diversity metrices were calculated by qiime diversity command with minimum depth of 500000. Statistical analysis was done using the ggpubr R package. Multiple groups p-value was calculated with Kruscal-Wallis and comparisons between two groups were done with the Wilcoxon test. DEICODE (Robust Aitchison PCA) was used to link specific features to beta-diversity ordination.
description: raw data for this analysis had been made publically available in NCBI bioproject ID: PRJNA786615.
Refinement and modularity of immortal dyons
Creators: name: Alexandrov, Sergei
name: Nampuri, Suresh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Extending recent results in ${\cal N}=2$ string compactifications, we propose that the holomorphic anomaly equation satisfied by the modular completions of the generating functions of refined BPS indices has a universal structure independent of the number ${\cal N}$ of supersymmetries. We show that this equation allows to recover all known results about modularity (under $SL(2,\mathbb{Z})$ duality group) of BPS states in ${\cal N}=4$ string theory. In particular, we reproduce the holomorphic anomaly characterizing the mock modular behavior of quarter-BPS dyons and generalize it to the case of non-trivial torsion invariant.
description: 32 pages; references and clarifications added
Dynamics of learning in coupled oscillators tutored with delayed reinforcements
Creators: name: Trevisan, Marcos A.
name: Bouzat, Sebastian
name: Samengo, Ines
name: Mindlin, Gabriel B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: In this work we analyze the solutions of a simple system of coupled phase oscillators in which the connectivity is learned dynamically. The model is inspired in the process of learning of birdsong by oscine birds. An oscillator acts as the generator of a basic rhythm, and drives slave oscillators which are responsible for different motor actions. The driving signal arrives to each driven oscillator through two different pathways. One of them is a "direct" pathway. The other one is a "reinforcement" pathway, through which the signal arrives delayed. The coupling coefficients between the driving oscillator and the slave ones evolve in time following a Hebbian-like rule. We discuss the conditions under which a driven oscillator is capable of learning to lock to the driver. The resulting phase difference and connectivity is a function of the delay of the reinforcement. Around some specific delays, the system is capable to generate dramatic changes in the phase difference between the driver and the driven systems. We discuss the dynamical mechanism responsible for this effect, and possible applications of this learning scheme.
description: 10 pages, 6 figures, to be published in Phys. Rev. E
A Symmetry Breaking Model for X Chromosome Inactivation
Creators: name: Nicodemi, M.
name: Prisco, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: In mammals, dosage compensation of X linked genes in female cells is achieved by inactivation of one of their two X chromosomes which is randomly chosen. The earliest steps in X-inactivation (XCI), namely the mechanism whereby cells count their X chromosomes and choose between two equivalent X, remain mysterious. Starting from the recent discovery of X chromosome colocalization at the onset of X-inactivation, we propose a Statistical Mechanics model of XCI, which is investigated by computer simulations and checked against experimental data. Our model describes how a `blocking factor' complex is self-assembled and why only one is formed out of many diffusible molecules, resulting in a spontaneous symmetry breaking (SB) in the binding to two identical chromosomes. These results are used to derive a scenario of biological implications describing all current experimental evidences, e.g., the importance of colocalization.
description: See also Nature Physics N&V April 2007
Characterization of the mannan-degrading system of cellulomonas fimi
Creators: name: Stoll, Dominik
Publisher: name: University of British Columbia
Year: 2009

description: In this study the mannan-degrading system of the Gram positive bacterium Cellulomonas fimi was characterised. C. fimi can degrade different forms of mannan and can use the degradation products as carbon and energy source. This study focuses on the galactomannan-degrading system which was found to be composed of one secreted endo- 1,4- β -mannanase (Man26A), one intracellular l,4-β-mannosidase (Man2A) and one intracellular 1,6-α-galactosidase. The genes encoding Man26A and Man2A have been isolated and sequenced, and the enzyme activities were investigated. The endo-l,4- β -mannanase (Man26A) has a multidomain structure and comprises a family 26 catalytic domain, a mannan-binding domain (MBD), a S-layer homology domain (SLH domain) and a domain of yet unknown function. Mannanase activity was detected on the cell surface and in the culture supernatant. It is believed that the SLH domain mediates transient binding of Man26A to the cell surface and the MBD mediates binding to the substrate. Strong binding of the MBD to soluble mannan was detected and its potential as an affinity tag for protein purification in aqueous 2-phase systems was tested. The 1,4- β -mannosidase (Man2A), cleaves β -1,4 mannosidic linkages with net retention of the anomeric configuration. Man2A was transformed into the glycosynthase Man2A E519A by mutating the catalytic nucleophile, E519 to alanine. Glycosynthases are retaining glycosidases without hydrolytic but with synthetic activity. Using α-mannosyl fluoride as donor and p-nitrophenyl sugars as acceptors, the glycosynthase Man2A E519A catalyzed the synthesis of β -1,4 and β -1,3 mannosidic linkages. In this study the biology of mannan-degradation by C. fimi was investigated and the biotechnological potential of its components was explored.
К вопросу об идентификации и датировке дагестанских рукописей
Creators: name: Ибрагимова Заира Багаудиновна
Publisher: name: Acta Historica: труды по истории, археологии, этнографии и обществознанию
Year: 2018
Subjects: ДАГЕСТАНСКИЕ РУКОПИСИ
БУМАГА
ИДЕНТИФИКАЦИЯ
ДАТИРОВКА
DAGESTAN MANUSCRIPTS
PAPER
IDENTIFICATION
DATING

description: Статья посвящена вопросу идентификации и датировки бумаги рукописей, как одного из значимых аспектов кодикологического анализа. В ходе работы с материалами Фонда восточных рукописей ИИАЭ ДНЦ РАН, а также во время археографических экспедиций определены предварительные хронологические границы использования бумаги разного вида при изготовлении дагестанских рукописей. С наибольшими трудностями исследователи сталкиваются при изучении бумаги восточной и дагестанской, так как ни них отсутствуют какие-либо маркировочные знаки.
Данные письменных источников об оборонительных сооружениях на Восточном Кавказе в эпоху великого переселения народов
Creators: name: Гмыря Людмила Борисовна
Publisher: name: Acta Historica: труды по истории, археологии, этнографии и обществознанию
Year: 2018
Subjects: WESTERN CASPIAN SEA
DEFENSIVE STRUCTURES
SOURCES
THE GREAT MIGRATION
FORTIFICATION
DAGESTAN

description: В статье анализируются данные письменных источников V-XIII вв. о возведении оборонительных сооружений в Каспийском проходе (южный участок Западного Прикаспия). Основное внимание уделено полноте информативности сведений, их достоверности и конкретности. Учет важности факторов осуществлялся, исходя из наличия множества компонентов (время возведения объекта и длительность его функционирования, топография места расположения, архитектурные и инженерно-технические особенности сооружений, характер строительных материалов и места их добычи, система функционирования фортификации, объем финансирования, наличие международного характера организации обороны в исследуемом регионе и др.). Проведенными исследованиями выявлены мало информативность и противоречивость данных письменных источников по проблеме исследования, обусловленных значительной отдаленностью, неосвоенностью и недоступностью мест их нахождения для получения объективной информации.
A unified accretion-ejection paradigm for Black Hole X-ray Binaries
Creators: name: Ferreira, J.
name: Petrucci, P. O.
name: Henri, G.
name: Sauge, L.
name: Pelletier, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new picture for the central regions of Black Hole X-ray Binaries. In our view, these central regions have a multi-flow configuration which consists in (1) an outer standard accretion disc down to a transition radius r_J, (2) an inner magnetized accretion disc below r_J driving (3) a non relativistic self-collimated electron-proton jet surrounding, when adequate conditions for pair creation are met, (4) a ultra relativistic electron-positron beam. This accretion-ejection paradigm provides a simple explanation to the canonical spectral states by varying the transition radius r_J and disc accretion rate independently. Large values of r_J correspond to the Quiescent state for low $\dot m$ and the Hard state for larger $\dot m$. These states are characterized by the presence of a steady electron-proton MHD jet emitted by the disc below r_J. The hard X-ray component is expected to form at the jet basis. When r_j becomes smaller than the marginally stable orbit r_i, the whole disc resembles a standard accretion disc, characteristic of the Soft state. Intermediate states correspond to situations where r_J ~ r_i. At large $\dot m$, an unsteady pair cascade process is triggered within the jet axis, giving birth to ejection of relativistic pair blobs. This would correspond to the luminous intermediate state, with its associated superluminal motions. The variation of r_J independently of $\dot m$ is a necessary ingredient in this picture, arising from the presence of a large scale vertical magnetic field threading the disc.
description: 15 pages, 2 figures. Accepted by A&A main journal
$k$-Uniform states and quantum information masking
Creators: name: Shi, Fei
name: Li, Mao-Sheng
name: Chen, Lin
name: Zhang, Xiande
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A pure state of $N$ parties with local dimension $d$ is called a $k$-uniform state if all the reductions to $k$ parties are maximally mixed. Based on the connections among $k$-uniform states, orthogonal arrays and linear codes, we give general constructions for $k$-uniform states. We show that when $d\geq 4k-2$ (resp. $d\geq 2k-1$) is a prime power, there exists a $k$-uniform state for any $N\geq 2k$ (resp. $2k\leq N\leq d+1$). Specially, we give the existence of $4,5$-uniform states for almost every $N$-qudits. Further, we generalize the concept of quantum information masking in bipartite systems given by [Modi \emph{et al.} {Phys. Rev. Lett. \textbf{120}, 230501 (2018)}] to $k$-uniform quantum information masking in multipartite systems, and we show that $k$-uniform states and quantum error-correcting codes can be used for $k$-uniform quantum information masking.
title: Analysis of Accident Data in Kentucky
title: (1983-1987)
titleType: Subtitle
Creators: name: Agent, Kenneth R.
name: Pigman, Jerry G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1988
Subjects: subject: Transportation Engineering

description: Kentucky has a systematic procedure to identify locations that have abnormal rates or numbers of accidents. This procedure utilizes average accident rates and numbers. A primary objective of this study was to determine average accident statistics in Kentucky. An annual safety program for Kentucky, which includes the identification, programming, budgeting, and evaluation of safety projects, is prepared each year. The data presented in this report may be included as the problem identification portion of Kentucky's Annual Highway Safety Plan.  Average and critical accident rates were calculated by highway type for rural and urban highways. A summary of results and recommendations in several problem identification areas is presented. These general areas include alcohol, occupant protection, speed, pedestrians, bicycles, and vehicle defects.
Diluted 3d-Random Field Ising Model at zero temperature with metastable dynamics
Creators: name: Illa, Xavier
name: Vives, Eduard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the influence of vacancy concentration on the behaviour of the three dimensional Random Field Ising model with metastable dynamics. We focus our analysis on the number of spanning avalanches which allows for a clean determination of the critical line where the hysteresis loops change from continuous to discontinuous. By a detailed finite size scaling analysis we determine the phase diagram and prove numerically the critical exponents along the whole critical line. Finally we discuss the origin of the curvature of the critical line at high vacancy concentration.
description: 9 pages, 14 figures, submitted to PRB
The extended binary quadratic residue code of length 42 holds a 3-design
Creators: name: Bonnecaze, Alexis
name: Solé, Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94 B15, 62K10

description: The codewords of weight $10$ of the $[42,21,10]$ extended binary quadratic residue code are shown to hold a design of parameters $3-(42,10,18).$ Its automorphism group is isomorphic to $PSL(2,41)$. Its existence can be explained neither by a transitivity argument, nor by the Assmus-Mattson theorem.
description: 6 pages. Second version
Müller, Gerhard (Hrsg.), Theologische Realenzyklopädie (TRE)
Creators: name: Krüger, Hanfried
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 2 (1990): Ökumenische Rundschau, Band 39, Heft 2
Non-monotone travelling waves in a single species reaction-diffusion equation with delay
Creators: name: Faria, Teresa
name: Trofimchuk, Sergei
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 35K57, 35R10 (primary) 92D25 (secondary)

description: We prove the existence of a continuous family of positive and generally non-monotone travelling fronts in delayed reaction-diffusion equations $u_t(t,x) = Δu(t,x)- u(t,x) + g(u(t-h,x)) (*)$, when $g \in C^2(R_+,R_+)$ has exactly two fixed points: $x_1= 0$ and $x_2= a >0$. Recently, non-monotonic waves were observed in numerical simulations by various authors. Here, for a wide range of parameters, we explain why such waves appear naturally as the delay $h$ grows. For the case of $g$ with negative Schwarzian, our conditions are rather optimal; we observe that the well known Mackey-Glass type equations with diffusion fall within this subclass of $(*)$. As an example, we consider the diffusive Nicholson's blowflies equation.
description: 23 pages, several important modifications are made. Some references and comments added to the previous version. To appear in the Journal of Differential Equations
Hubbard models and state preparation in an optical Lieb lattice
Creators: name: Flannigan, Stuart
name: Madail, Luisa
name: Dias, Ricardo G.
name: Daley, Andrew J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Inspired by the growing interest in probing many-body phases in novel two-dimensional lattice geometries we investigate the properties of cold atoms as they could be observed in an optical Lieb lattice. We begin by computing Wannier functions localised at individual sites for a realistic experimental setup, and determining coefficients for a Hubbard-like model. Based on this, we show how experiments could probe the robustness of edge states in a Lieb lattice with diagonal boundary conditions to the effects of interactions and realise strongly correlated many-body phases in this geometry. We then generalise this to interacting particles in a half-filled 1D Lieb ladder, where excitations are dominated by flat band states. We show that for strong attractive interactions, pair correlations are enhanced even when there is strong mixing with the Dirac cone. These findings in 1D raise interesting questions about the phases in the full 2D Lieb lattice which we show can be explored in current experiments.
description: 10 pages, 8 figures
Lorentzian Vacuum Transitions: Open or Closed Universes?
Creators: name: Cespedes, Sebastian
name: de Alwis, Senarath P.
name: Muia, Francesco
name: Quevedo, Fernando
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the generalisation of quantum tunneling transitions in the WKB approximation to the time-independent functional Schrödinger and Wheeler-DeWitt equations. Following a Lorentzian approach, we compute the transition rates among different scalar field vacua and compare with those performed by Coleman and collaborators using the Euclidean approach. For gravity, we develop a general formalism for computing transition rates in Wheeler's superspace. This is then applied to computing decays in flat space and then to transitions in the presence of gravity. In the latter case we point out the complexities arising from having non-positive definite kinetic terms illustrating them in the simplified context of mini-superspace. This corresponds to a generalisation of the well-known `tunneling from nothing' scenarios. While we can obtain the leading term for the transitions obtained by Euclidean methods we also point out some differences and ambiguities. We show that there is no obstruction to keeping the spherically ($SO(4)$) symmetric closed slicing for the new vacuum after a de Sitter to de Sitter transition. We argue that this is the natural Lorentzian realisation of the Coleman-De Luccia instanton and that a closed universe is also obtained if the mini-superspace assumption is relaxed. This is contrary to the open universe predicted by Coleman-De Luccia which relies on an analytic continuation performed after bubble nucleation. Our findings may have important cosmological implications related to the origin of inflation and to the string landscape. In particular, they question the widespread belief that evidence for a closed universe would rule out the string landscape.
description: 41 pages+ appendices, 15 figues. Minor rewording and references added
Mathematical modelling of glass melting fumace design with regard to ΝΟₓ formation
Creators: name: May, Frank
name: Kremer, Hans
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Α three-dimensional mathematical model for turbulent flow and combustion on the basis of turbulence/chemistry interactions and radiative heat transfer taking into account spectral effects of surrounding walls and combustion gases is described. For this the transport equation for radiative intensity was split into different wavelength ranges. Α block-structured finite volume grid with local refmements was used to solve the governing equations. The calculation domain is subdivided into a number of subdomains which are linked within the solver based on the Message Passing Interface library Computed distributions of velocity, temperature, and heat fluxes are given. Results of a parametric study in a producing horseshoe furnace by increasing the height of the furnace with regard to ΝΟₓ concentration distributions are presented.
stress distribution in thermally tempered glass panes near the edges, corners and holes : Part 1. Temperature distributions during the tempering process of glass panes
Creators: name: Laufs, Wilfried
name: Sedlacek, Gerhard
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: While theoretical and experimental analyses of temper Stresses within the central areas of glass plates, i.e. for the theoretically "infinite plate", have been carried out in the past, the distributions of the induced Stresses near the edges and holes have yet to be examined in order to give a complete description of the stress field in the entire plate. The build-up of temper stresses depends on the temperature distribution as a function of time. For this reason, in part 1 of this paper the two- and three-dimensional cooling phenomena during the tempering process have been studied for all zones of a pane by means of analytical Solutions of the equation of heat conduction as well as by means of a discrete Simulation (Finite Element Method). The latter method allows for studying the temperature distributions in the vicinity of arbitrarily shaped holes. The influence of the tempering parameters (coefficient of heat transfer) and of the material constants on the temperature distribution is described, too. Part 2 of this paper deals with the induced distributions of temper stresses resulting from the thermal history of glass plates as defined in part 1.
Phase chemistry study of products from the vitrification processes AshArc and Deglor
Creators: name: Traber, Daniel
name: Mäder, Urs
name: Eggenberger, Urs
name: Simon, Franz-Georg
name: Wieckert, Christian
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: AshArc and Deglor are two new complementary vitrification processes for residues from incineration of municipal solid waste. The hazardous fly ash and bottom ash are converted into a glassy product (main product), a heavy metal salt fraction, a metal fraction (AshArc only) and an off-gas. AshArc is a reductive melting process based on DC arc furnace technology, whereas the Deglor process is based on a glass tank furnace with a more oxidizing gas atmosphere. Samples from pilot and technical scale Operations of both processes were analyzed in detail using methods from petrography and chemical analysis by electron microprobe and X-ray fluorescence. Both processes produce homogeneous glassy melts with variable amounts of metal-rich minute inclusions. For the reductive AshArc process with a relatively short retention time in the furnace the melt contains a minor fraction of metal and metal sulfide inclusions enriched in iron, copper and lead, as well as traces of chromium spinel. Deglor samples are either free of inclusions or contain traces of metal sulfide enriched in copper, iron, nickel and lead. The residues contain heavy metal concentrations below those stipulated for inert waste materials according to Swiss legislation except for zinc in some samples.
Does Shelyubskii's evaluation method characterize the homogeneity of glass?
Creators: name: Hoffmann, Hans-Jürgen
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Α formula given by Shelyubskii has been used in several publications to characterize the homogeneity of glasses from internal spectral transmittance curves of Christiansen filters. It is shown that this evaluation method cannot provide any useful data on the homogeneity of glass.
Optical and Near-Infrared Integral Field Spectroscopy of the SCUBA Galaxy N2-850.4
Creators: name: Swinbank, Mark
name: Smail, Ian
name: Bower, Richard
name: Borys, Colin
name: Chapman, Scott
name: Blain, Andrew
name: Ivison, Rob
name: Ramsay-Howat, Suzie
name: Keel, William
name: Bunker, Andrew
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical and near-infrared integral field spectroscopy of the SCUBA galaxy SMM J163650.43+405734.5 (ELAIS N2 850.4) at z=2.385. We combine Ly-alpha and H-alpha emission line maps and velocity structure with high resolution HST ACS and NICMOS imaging to probe the complex dynamics of this vigorous star-burst galaxy. The imaging data shows a complex morphology, consisting of at least three components separated by ~1'' (8kpc) in projection. When combined with the H-alpha velocity field from UKIRT UIST IFU observations we identify two components whose redshifts are coincident with the systemic redshift, measured from previous CO observations, one of which shows signs of AGN activity. A third component is offset by 220+/-50km/s from the systemic velocity. The total star formation rate of the whole system (estimated from the narrow-line H-alpha and uncorrected for reddening) is 340+/-50Mo/yr. The Ly-alpha emission mapped by the GMOS IFU covers the complete galaxy and is offset by +270+/-40km/s from the systemic velocity. This velocity offset is comparable to that seen in rest-frame UV-selected galaxies at similar redshifts and usually interpreted as a star-burst driven wind. The extended structure of the Ly-alpha emission suggests that this wind is not a nuclear phenomenon, but is instead a galactic scale outflow. Our observations suggest that the vigorous activity in N2 850.4 is arising as a result of an interaction between at least two dynamically-distinct components, resulting in a strong starburst, a starburst-driven wind and actively-fuelled AGN activity. [abridged]
description: Accepted for publication in MNRAS; 8 pages, 2 figure