cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
QuaSiMo: A Composable Library to Program Hybrid Workflows for Quantum Simulation
Creators: name: Nguyen, Thien
name: Bassman, Lindsay
name: Lotshaw, Phillip C.
name: Lyakh, Dmitry
name: McCaskey, Alexander
name: Leyton-Ortega, Vicente
name: Pooser, Raphael
name: Elwasif, Wael
name: Humble, Travis S.
name: de Jong, Wibe A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a composable design scheme for the development of hybrid quantum/classical algorithms and workflows for applications of quantum simulation. Our object-oriented approach is based on constructing an expressive set of common data structures and methods that enable programming of a broad variety of complex hybrid quantum simulation applications. The abstract core of our scheme is distilled from the analysis of the current quantum simulation algorithms. Subsequently, it allows a synthesis of new hybrid algorithms and workflows via the extension, specialization, and dynamic customization of the abstract core classes defined by our design. We implement our design scheme using the hardware-agnostic programming language QCOR into the QuaSiMo library. To validate our implementation, we test and show its utility on commercial quantum processors from IBM and Rigetti, running some prototypical quantum simulations.
description: arXiv admin note: substantial text overlap with arXiv:2101.08151
Thinking transport as a twist
Creators: name: Giardina, Cristian
name: Kurchan, Jorge
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The determination of the conductivity of a deterministic or stochastic classical system coupled to reservoirs at its ends can in general be mapped onto the problem of computing the stiffness (the `energy' cost of twisting the boundaries) of a quantum-like operator. The nature of the coupling to the reservoirs determines the details of the mechanical coupling of the torque at the ends.
description: 21 pages, 1 figure. Minor corrections in Eq. (4)
Interaction-Induced Strong Localization in Quantum Dots
Creators: name: Guclu, A. D.
name: Ghosal, A.
name: Umrigar, C. J.
name: Baranger, H. U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We argue that Coulomb blockade phenomena are a useful probe of the cross-over to strong correlation in quantum dots. Through calculations at low density using variational and diffusion quantum Monte Carlo (up to r_s ~ 55), we find that the addition energy shows a clear progression from features associated with shell structure to those caused by commensurability of a Wigner crystal. This cross-over (which occurs near r_s ~ 20 for spin-polarized electrons) is, then, a signature of interaction-driven localization. As the addition energy is directly measurable in Coulomb blockade conductance experiments, this provides a direct probe of localization in the low density electron gas.
description: 4 pages, published version, revised discussion
The influence of swirl and turbulence on flames in lean gaseous mixtures
Creators: name: Bauwens, Luc
Publisher: name: University of British Columbia
Year: 2010

description: Repeated measurements were made of pressure rise, in a cylindrical constant volume combustion bomb, with central ignition, in swirling mixture, for a combination of different lean mixtures of propane and air and different swirls. The swirl was obtained by high speed charging through an eccentric port. Different flow conditions were obtained by varying the decay time between the end of charging and ignition. Two different lean mixtures of propane and air were tested. Velocity measurements provided information relating to the flow field. No large spatial variation of the turbulence intensity is observed, and its decay is approximately described by the homogeneous, isotropic laws. Computing the length scales according to such a model, one observes that for both mixtures, turbulent burning velocities appear to vary linearly with Re[sub λ] . The burning rate was found to depend strongly on the equivalence ratio. Even at the highest levels obtained of turbulence intensity, the leanest mixture burns at half the speed of the richer one. No difference in ignition delay is apparent, and the ratio of burning velocities seems to be maintained virtually over the whole combustion time.
“More questions than answers”: Ohio farmers’ perceptions of novel soil health data and their utility for on-farm management
Creators: name: Singh, Prabhjot
name: Kawa, Nicholas C.
name: Sprunger, Christine D.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Medicine
Biotechnology
Information Systems not elsewhere classified
Cancer
Science Policy

description: Soil health has become an emergent focus of contemporary agricultural research, yet little work has addressed how soil health data – and biological indicators in particular – are interpreted by farmers and potentially incorporated into their decision-making. To address this gap, in-depth interviews were conducted with 20 Ohio farmers after sharing a soil health report that detailed physical, chemical, and biological indicators from at least two sampled fields from their farms. Research findings demonstrate that while farmers expressed strong interest in soil biological health indicators specifically, the data often raised more questions than answers for participants. Specifically, three main themes emerged in the interviews: 1) uncertainties in interpreting the soil health indicators, 2) questions regarding translation of soil health data into management, and 3) affirmation of existing management choices. The first two response themes point to a need for scientists to develop greater access and exposure to soil health data to facilitate interpretation. Furthermore, researchers and extension agents can play a critical role in guiding recommendations for potential application of soil health data in on-farm management. While research on soil health has widely expanded in recent years, this study highlights the need for greater attention to its translational science and the co-production of knowledge.
The prediction of liver decompensation using hepatic collagen deposition assessed by computer-assisted image analysis with Masson’s trichrome stain
Creators: name: Yoo, Hae Won
name: Park, Jae Woo
name: Jung, Min Jung
name: Yoo, Jeong-Ju
name: Kim, Sang Gyune
name: Kim, Young Seok
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: The current pathologic system classifies structural deformation caused by hepatic fibrosis semi-quantitatively, which may lead to a disagreement among pathologists. We measured hepatic fibrosis quantitatively using collagen proportionate area (CPA) in compensated cirrhotic patients and assessed its impact on predicting the development of liver decompensation. From January 2010 to June 2018, we assessed 101 patients who went through liver biopsy and received diagnosis as compensated cirrhosis with digital image analysis of CPA. Clinical and laboratory data were collected at the baseline and at the time of the last follow-up or progression to liver decompensation (LD). The mean age was 50.8 ± 10.5 years, and the most common etiology of liver disease was chronic hepatitis B (48.5%), followed by alcoholic hepatitis (18.8%). The mean CPA was 16.91 ± 9.60%. The mean CPA values were different in patients with and without LD development (21.8 ± 11.1 vs. 15.2 ± 8.5). During the median follow-up of 60.0 months, 26 out of 101 patients experienced LD. Older age (hazard ratio [HR],1.069; p = 0.015), prolonged international normalized ratio (HR, 6.449; p = 0.019) and higher CPA (HR, 1.049; p = 0.040) were independent predictors of liver decompensation on multivariate cox-regression analysis. When patients were divided according to the optimal CPA threshold (26.8%), higher CPA predicted LD better than lower CPA. (Log-rank test: p < 0.001) CPA could be a useful quantitative prognostic value for patients with compensated cirrhosis.
The impact of proton pump inhibitors on the course of ulcerative colitis: a cohort study of over 10,000 newly diagnosed patients in Norway
Creators: name: Fossmark, Reidar
name: Lirhus, Sandre Svatun
name: Høivik, Marte Lie
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Proton pump inhibitors (PPI) affect the gastrointestinal microbiota, which is thought to play a role in the pathogenesis of ulcerative colitis (UC). Previous studies suggest an association between PPI use and risk of incident UC as well as disease course. The aim of the study was to examine if PPI exposure is associated with disease course in UC patients. A national cohort consisting of all newly diagnosed UC patients from 2010 to 2020 was defined combining data from Norwegian registries. PPI exposure was included as a time dependent variable with a 30 day time lag from starting the drug. Outcomes were starting advanced therapies including anti-TNF, systemic glucocorticoids, any additional systemic anti-inflammatory medication and undergoing colectomy during follow-up. Time-dependent Cox regressions included the variables PPI use, first systemic glucocorticoid prescription, first UC hospitalization, age-groups and sex. The study cohort consisted of 10,149 patients with median age 40 years (IQR 27–56) and 56% males. PPI use independently increased the risk of starting advanced therapies (HR 1.54, 95% CI 1.36–1.73, p < 0.005), starting systemic glucocorticoids (HR 1.20, 95% CI 1.07–1.34, p < 0.005), starting any additional anti-inflammatory treatment (HR 1.18, 95%CI 1.05–1.32, p < 0.01) and undergoing colectomy (HR 1.52, 95%CI 1.17–1.98, p < 0.005). PPI use was associated with unfavorable outcomes including advanced therapy initiation, additional anti-inflammatory medications and undergoing colectomy. Although further studies are needed, the evidence suggests that PPIs could affect the course of UC and should be used cautiously in UC patients.
Polarized superfluidity in the attractive Hubbard model with population imbalance
Creators: name: Dao, Tung-Lam
name: Ferrero, Michel
name: Georges, Antoine
name: Capone, Massimo
name: Parcollet, Olivier
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a two-component Fermi system with attractive interactions and different populations of the two species in a cubic lattice. For an intermediate coupling we find a uniformly polarized superfluid which is stable down to very low temperatures. The momentum distribution of this phase closely resembles that of the Sarma phase, characterized by two Fermi surfaces. This phase is shown to be stabilized by a potential energy gain, as in a BCS superfluid, in contrast to the unpolarized BEC which is stabilized by kinetic energy. We present general arguments suggesting that preformed pairs in the unpolarized superfluid favor the stabilization of a polarized superfluid phase.
description: 4+ pages, 4 figures, new version
The Atiyah-Singer index formula for subelliptic operators on contact manifolds, Part I
Creators: name: van Erp, Erik
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 19K56 (Primary) 58J20, 53D10 (Secondary)

description: The Atiyah-Singer index theorem is a topological formula for the index of an elliptic differential operator. The topological index depends on a cohomology class that is constructed from the principal symbol of the operator. On contact manifolds, the important Fredholm operators are not elliptic, but hypoelliptic. Their symbolic calculus is noncommutative, and involves analysis on the Heisenberg group. For a hypoelliptic differential operator in the Heisenberg calculus on a contact manifold we construct a symbol class in the K-theory of a noncommutative C*-algebra of symbols. There is a canonical map from this analytic K-theory group to the deRham cohomology of the manifold, which gives a class to which the Atiyah-Singer formula can be applied. We prove that the index formula holds for these hypoelliptic operators. Our methods derive from Connes' tangent groupoid proof of the index theorem.
description: 34 pages; to be published in Annals of Mathematics (submitted 4-14-2006, accepted 4-3-2008)
Odziaływanie łupka miedzionośnego z cieczą jonową
Creators: name: Kącka, Katarzyna
name: Drzymała, Jan
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2014
Subjects: Łupek, ciecz jonowa

description: Łupek miedzionośny, Drzymała J., Kowalczuk P.B. (red.), WGGG PWr, Wrocław, ISBN 978-83-937788-6-7
From the bench to science policy: leveraging your skills and background
Creators: name: Bankston, Adriana
Publisher: name: F1000 Research Limited
Year: 2019

description: This talk was given at Rush University on June 14, 2019 as part of the Rush University Graduate College Career Development Series. It covered Dr. Bankston's transition from the bench to science policy, and how she leveraged her scientific skills and research background towards this career path. She discussed her roles in various non-profit organizations and how these experiences built upon each other to move her career forward. The talk also included an interactive section to determine the needs of the audience in terms of career development and preparation, and provided general resources for career transitions.
title: On A Hybrid Concept for Approximating Self‐Excited Periodic Oscillations of Large‐Scaled Dynamical Systems
Creators: name: Kappauf, Jonas
name: Hetzler, Hartmut
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: 620
subject: 530
subject: Schwingung
subject: Harmonische Balance
subject: Finite-Differenzen-Methode
subject: Mechanische Eigenschaft

description: Gefördert im Rahmen des Projekts DEAL
Do farmer groups improve the situation of women in agriculture in rural Kenya?
Creators: name: Ingutia, Rose
name: Sumelius, John
name: Ingutia, Rose
name: Sumelius, John
Publisher: name: Unknown
Year: 2021
Subjects: subject: Farm Management
subject: International Development
subject: farmer groups
subject: female farmers
subject: crop yield
subject: rural Kenya
subject: productive resources

description: Production by smallholders in rural Kenya is limited by institutional, technical and investment constraints. Female farmers are the majority among smallholders and have significant roles in agriculture; nonetheless, they face constraints in accessing resources. Recent primary data of 347 farmers (proportional random sampling) was used to examine: (a) factors affecting women’s participation in agriculture; (b) factors influencing female farmers’ decision to join a farmer group; and (c) the effect of women’s membership in a farmer group on crop yield. We applied Probit and linear regression with endogenous treatment maximum likelihood methods. Results reveal that women’s participation is positively influenced by membership in a farmer group and land ownership. Women’s decision to join a farmer group is positively affected by access to credit, and negatively by limited decision-making power and lack of access to land. Crop yield is positively affected by membership years in a farmer group and ownership of mobile phones, negatively by lack of credit. Farmer groups are a particularly effective platform to improve crop yields and other constraints confronting female farmers. Surprisingly, this platform is under-utilised. Policymakers should invest in human, financial and physical capital of farmer groups as a pathway to rural development, improved rural livelihoods and reduced poverty.
Thermodynamics of free and bound magnons in graphene
Creators: name: Pierce, Andrew T.
name: Xie, Yonglong
name: Lee, Seung Hwan
name: Forrester, Patrick R.
name: Wei, Di S.
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Halperin, Bertrand I.
name: Yacoby, Amir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Symmetry-broken electronic phases support neutral collective excitations. For example, monolayer graphene in the quantum Hall regime hosts a nearly ideal ferromagnetic phase at filling factor $ν=1$ that spontaneously breaks spin rotation symmetry. This ferromagnet has been shown to support spin-wave excitations known as magnons which can be generated and detected electrically. While long-distance magnon propagation has been demonstrated via transport measurements, important thermodynamic properties of such magnon populations--including the magnon chemical potential and density--have thus far proven out of reach of experiments. Here, we present local measurements of the electron compressibility under the influence of magnons, which reveal a reduction of the $ν=1$ gap by up to 20%. Combining these measurements with estimates of the temperature, our analysis reveals that the injected magnons bind to electrons and holes to form skyrmions, and it enables extraction of the free magnon density, magnon chemical potential, and average skyrmion spin. Our methods furnish a novel means of probing the thermodynamic properties of charge-neutral excitations that is applicable to other symmetry-broken electronic phases.
An XMM-Newton survey of broad iron lines in Seyfert galaxies
Creators: name: Nandra, K.
name: O'Neill, P. M.
name: George, I. M.
name: Reeves, J. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of the X-ray spectra of a sample of 37 observations of 26 Seyfert galaxies observed by XMM-Newton in order to characterize their iron K emission. All objects show evidence for iron line emission in the 6-7 keV band. A narrow core at 6.4 keV is seen almost universally in the spectra, and we model this using a neutral Compton reflection component, assumed to be associated with distant, optically thick material such as the molecular torus. Once this, and absorption by a zone of ionized gas in the line-of-sight is accounted for, less than half of the sample observations show an acceptable fit. Approximately 2/3 of the sample shows evidence for further, broadened emission in the iron K-band. When modeled with a Gaussian, the inferred energy is close to that expected for neutral iron, with a slight redshift, with an average velocity width of ~0.1c. The mean parameters are consistent with previous ASCA results and support the idea that the broad components can be associated with the accretion disk. Before proceeding to that conclusion, we test an alternative model comprising a blend of 3-4 narrow, unshifted emission lines (including the 6.4 keV core), together with 1-2 zones of highly ionized gas in the line-of-sight. Around 1/3 of the objects are not adequately fit by this model, and in general better fits are obtained with a relativistic disk line model, which has fewer free parameters. Nonetheless we find that absorption by ionized gas affects the spectrum above 2.5 keV in approximately half the sample. There is evidence for multiple ionized zones in at least 3 objects, but in all those cases a blurred reflector is required in addition to the complex absorption. (truncated)
description: 36 pages, 13 figures, accepted for publication in MNRAS
ЁШЛАР ИЖТИМОИЙЛАШУВИДА АХЛОҚИЙ ҚАДРИЯТЛАРНИНГ ЎРНИ
Creators: name: Шамсия Курултаевна Исмаилова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: ёшлар
ижтимоийлашув жараёни
тадқиқотлар
ахлоқий қадриятлар
шахслараро муносабатлар

description: Ушбу мақолада замонавий ёшлар ахлоқий қадриятларини ўрганиш бўйича ўтказилган ижтимоий сўровнома натижалари келтирилган. Ёшларнинг ахлоқ, оила қадриятлари, замонавийлик тушунчаларига муносабати ижтимоий-педагогик ҳамда психологик жиҳатдан таҳлил қилинган, муайян хулосалар ишлаб чиқилган.
ЎҚИТИШНИНГ МУАММОЛИ ШАКЛИ ВА УНИНГ ЎҚУВ ЖОРИЙ ЭТИШНИНГ НАЗАРИЙ-МЕТОДИК ЖИҲАТЛАРИ
Creators: name: Усмон Аллакулович Нуруллаев
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Ўқитувчи
талаба
муаммоли вазият
метод
муаммоли таълим
ишонч
хурмат
таълим
мустақил.

description: Ушбу мақолада муаммоли ўқитиш орқали талабани ўз фикрини айта олиши, уни ҳимоя қилиши, машғулот жараёнида бир-бирига ҳурмат билан ёндашиши, талабаларда ишонч ва ишчанлик руҳи ҳукмрон бўлиши ёритилган. Талаба ўқитувчининг ўргатишга самимий интилаётганлиги, уни ўзига тенг кўраётганини яққол ҳис қилиши, ўқитишда шахс омилини ҳисобга олган ҳолда ўқитувчининг ишлаш педагогикасини қўллаш ва дарс машғулотларини муаммоли таълим билан ўтказиш талабаларда ўз устида ишлашиши, илмий билиш методларини ўзлаштириб, тадқиқотчилик фаолиятини олиб бориш кўникмаси, эга бўлаши келтирилиб ўтилган.
ФИЗИЧЕСКАЯ КУЛЬТУРА КАК ОСНОВОПОЛАГАЮЩИЙ КОМПОНЕНТ ЗДОРОВОГО ОБРАЗА ЖИЗНИ СОВРЕМЕННОГО ЧЕЛОВЕКА
Creators: name: Шамиль Хамидович Кожбахтеев
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: система образования
физическая культура
здоровый образ жизни
спорт
учебно-воспитательный процесс

description: В статье физическая культура как компонент здорового образа жизни рассматривается тема активности, и её включения здоровый образ жизни человека объясняется польза физической активности организма. Также физическая культура и спорт в учебно-воспитательном процессе студенческой молодёжи.
МАКТАБ МЕНЕЖМЕНТИ – ТАЪЛИМНИ ЯНГИ БОСҚИЧГА КЎТАРИШ ОМИЛИ
Creators: name: А. Расулов
name: Р. Мусурмонов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Таълим
педагогика
мактаб мененжменти
инновация
педогогик кадр.

description: Мақолада мактаб менежменти фанига кириш, менежмент фани мазмун-моҳияти, мактаб менежменти асослари фанининг вазифаси, замонавий таълим тушунчасига изоҳ, инновация ва инновацион таълим, таълим самарадорлигига эришишнинг инновацион аспектлари атрофлича тўғрисида фикр юритилган, тавсиялар берилган.
A self-lensing binary massive black hole interpretation of quasi-periodic eruptions
Creators: name: Ingram, Adam
name: Motta, Sara
name: Aigrain, Suzanne
name: Karastergiou, Aris
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Binary supermassive black hole (SMBH) systems result from galaxy mergers, and will eventually coalesce due to gravitational wave (GW) emission if the binary separation can be reduced to $\lesssim 0.1$ pc by other mechanisms. Here, we explore a gravitational self-lensing binary SMBH model for the sharp (duration $\sim 1$ hr), quasi-regular X-ray flares -- dubbed quasi-periodic eruptions -- recently observed from two low mass active galactic nuclei: GSN 069 and RX J1301.9+2747. In our model, the binary is observed $\sim$edge-on, such that each SMBH gravitationally lenses light from the accretion disc surrounding the other SMBH twice per orbital period. The model can reproduce the flare spacings if the current eccentricity of RX J1301.9+2747 is $ε_0 \gtrsim 0.16$, implying a merger within $\sim 1000$ yrs. However, we cannot reproduce the observed flare profiles with our current calculations. Model flares with the correct amplitude are $\sim 2/5$ the observed duration, and model flares with the correct duration are $\sim 2/5$ the observed amplitude. Our modelling yields three distinct behaviours of self-lensing binary systems that can be searched for in current and future X-ray and optical time-domain surveys: i) periodic lensing flares, ii) partial eclipses (caused by occultation of the background mini-disc by the foreground mini-disc), and iii) partial eclipses with a very sharp in-eclipse lensing flare. Discovery of such features would constitute very strong evidence for the presence of a supermassive binary, and monitoring of the flare spacings will provide a measurement of periastron precession.
description: Accepted for publication in MNRAS
MAGMA: a 3D, Lagrangian magnetohydrodynamics code for merger applications
Creators: name: Rosswog, S.
name: Price, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new, completely Lagrangian magnetohydrodynamics code that is based on the SPH method. The equations of self-gravitating hydrodynamics are derived self-consistently from a Lagrangian and account for variable smoothing length (``grad-h''-) terms in both the hydrodynamic and the gravitational acceleration equations. The evolution of the magnetic field is formulated in terms of so-called Euler potentials which are advected with the fluid and thus guarantee the MHD flux-freezing condition. This formulation is equivalent to a vector potential approach and therefore fulfills the $\vec{\nabla}\cdot\vec{B}=0$-constraint by construction. Extensive tests in one, two and three dimensions are presented. The tests demonstrate the excellent conservation properties of the code and show the clear superiority of the Euler potentials over earlier magnetic SPH formulations.
description: 18 pages, 17 Figures, a high resolution copy of the paper can be found at http://www.faculty.iu-bremen.de/srosswog/MAGMA.pdf
O'ZBEK TILSHUNOSLIGIDA MORFONOLOGIYAGA DOIR TALQINLARI
Creators: name: Tohir Fazliddinovich Galiyev
name: Fazliddin Galiyevich Sharipov
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: fonologiya
morfonologiya
morfologiya
sintaksis
leksika
stilistika

description: Maqolada o‘zbek tilining morfonologiyasini yoritishda ustoz A.G‘ulomning chuqur ilmiy g ‘oyalari katta yordam bo‘lganligi, bundan tashqari, o‘zbek tilining morfonologik sistemasi ham boshqa turkiy tillardagi ayrim xususiyatlari bilan farq qilishi yoritib berilgan.
L'ILLUMINAZIONE NATURALE PER IL RISPARMIO ENERGETICO ED IL COMFORT VISIVO. ANALISI TEORICA E SPERIMENTALE
Creators: name: Iuliano, Giuseppe Fabio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: L’illuminazione naturale costituisce una risorsa importante per la progettazione e la realizzazione di edifici energeticamente sostenibili e qualitativamente comfortevoli.
Un’adeguata illuminazione diurna ed una integrazione ottimale di luce naturale/ artificiale possono contribuire in maniera significativa al risparmio energetico negli edifici.
La presenza di luce naturale in un ambiente di lavoro influisce sulla soddisfazione, sulla prestazione e, quindi, anche sulla produttività dell’utente.
Nel contempo, una disponibilità di luce naturale particolarmente elevata in un ambiente chiuso può creare alcuni svantaggi:
•Per le condizioni climatiche. Infatti, un elevato irraggiamento comporta un incremento notevole dei carichi frigoriferi e quindi un conseguente incremento del fabbisogno energetico in fase di climatizzazione.
•Per le condizioni visive ottimali, sia per le reazioni di ordine psicologico che si avrebbero per effetto di un eccesso di luce diretta, sia per la variabilità nel tempo delle caratteristiche proprie della luce naturale.
Il panorama scientifico internazionale presenta approfondite ricerche finalizzate alla individuazione ed all’analisi dei vantaggi e degli svantaggi della luce naturale negli ambienti confinati. Di riflesso, anche il quadro normativo internazionale, europeo e nazionale, negli anni, si è arricchito di direttive e linee guida per progettisti e tecnici del settore.
Tuttavia, esistono ancora alcuni problemi tecnico-scientifici da risolvere prima che la metodologia d’impiego dell’illuminazione naturale possa raggiungere il livello delle procedure routinarie della progettazione.
Una delle priorità è l’approfondimento e la ricerca per rendere applicabili ed affidabili metodi, procedure ed indici di valutazione del comfort visivo in presenza di luce naturale.
Infatti, uno dei problemi che maggiormente si può verificare, in termini di comfort visivo, in ambienti caratterizzati da una significativa illuminazione naturale, è l’abbagliamento. In particolare, l’abbagliamento psicologico o molesto, anche detto Discomfort Glare.
La presente ricerca si è focalizzata su analisi e valutazioni, da un lato di carattere energetico riguardo un’integrazione ottimale di luce naturale/ artificiale, come previsto anche dal più attuale quadro normativo europeo (EN 15193 : 2007), dall’altro sul comfort visivo in presenza di luce naturale, attraverso il confronto di un indice di valutazione dell’abbagliamento da luce naturale, il DGI, con i risultati di valutazioni percettive in situazioni reali di abbagliamento da luce naturale, al fine di trarne utili elementi per chiarirne applicabilità e limiti e prospettarne eventuali modifiche.
Coverings, correspondences, and noncommutative geometry
Creators: name: Marcolli, Matilde
name: al-Yasry, Ahmad Zainy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 57M12, 82A15, 57M27, 58B34

description: We construct an additive category where objects are embedded graphs in the 3-sphere and morphisms are geometric correspondences given by 3-manifolds realized in different ways as branched covers of the 3-sphere, up to branched cover cobordisms. We consider dynamical systems obtained from associated convolution algebras endowed with time evolutions defined in terms of the underlying geometries. We describe the relevance of our construction to the problem of spectral correspondences in noncommutative geometry.
description: 31 pages, LaTeX
Differential rotation on both components of the pre main-sequence binary system HD 155555
Creators: name: Dunstone, N. J.
name: Hussain, G. A. J.
name: Cameron, A. Collier
name: Marsden, S. C.
name: Jardine, M.
name: Barnes, J. R.
name: Vlex, J. C. Ramirez
name: Donati, J. -F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first measurements of surface differential rotation on a pre-main sequence binary system. Using intensity (Stokes I) and circularly polarised (Stokes V) timeseries spectra, taken over eleven nights at the Anglo-Australian Telescope (AAT), we incorporate a solar-like differential rotation law into the surface imaging process. We find that both components of the young, 18 Myr, HD 155555 (V824 Ara, G5IV + K0IV) binary system show significant differential rotation. The equator-pole laptimes as determined from the intensity spectra are 80 days for the primary star and 163 days for the secondary. Similarly for the magnetic spectra we obtain equator-pole laptimes of 44 and 71 days respectively, showing that the shearing timescale of magnetic regions is approximately half that found for stellar spots. Both components are therefore found to have rates of differential rotation similar to those of the same spectral type main sequence single stars. The results for HD 155555 are therefore in contrast to those found in other, more evolved, binary systems where negligible or weak differential rotation has been discovered. We discuss two possible explanations for this; firstly that at the age of HD 155555 binary tidal forces have not yet had time to suppress differential rotation, secondly that the weak differential rotation previously observed on evolved binaries is a consequence of their large convection zone depths. We suggest that the latter is the more likely solution and show that both temperature and convection zone depth (from evolutionary models) are good predictors of differential rotation strength. Finally, we also examine the possible consequences of the measured differential rotation on the interaction of binary star coronae.
description: 13 pages, 10 figures, accepted for publication in MNRAS
Applicazioni di sistemi di visione ad una cella robotizzata
Creators: name: Strano, Salvatore
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: In questa tesi è stato sviluppato un sistema costituito da un robot ed un laser scanner capace di acquisire e realizzare superfici di interesse, con  la possibilità di verificare il risultato ottenuto mediante l’acquisizione della forma della copia realizzata. La motivazione di questo lavoro consiste nel vantaggio di avere un unico dispositivo mediante il quale è possibile scannerizzare e realizzare un prototipo a partire da un oggetto del quale non si dispone di un modello CAD.
Gapless Spin Wave Transport through a Quantum Canted-Antiferromagnet
Creators: name: Fu, Hailong
name: Huang, Ke
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Zhu, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the Landau levels of a two-dimensional electron system or when flat bands are present, e.g. in twisted van der Waals bilayers, strong electron-electron interaction gives rise to quantum Hall ferromagnetism with spontaneously broken symmetries in the spin and isospin sectors. Quantum Hall ferromagnets support a rich variety of low-energy collective excitations that are instrumental to understand the nature of the magnetic ground states and are also potentially useful as carriers of quantum information. Probing such collective excitations, especially their dispersion ω(k), has been experimentally challenging due to small sample size and measurement constraints. In this work, we demonstrate an all-electrical approach that integrates a Fabry-Pérot cavity with non-equilibrium transport to achieve the excitation, wave vector selection and detection of spin waves in graphene heterostructures. Our experiments reveal gapless, linearly dispersed spin wave excitations in the E = 0 Landau level of bilayer graphene, thus providing direct experimental evidence for a predicted canted antiferromagnetic order. We show that the gapless spin wave mode propagates with a high group velocity of several tens of km/s and maintains phase coherence over a distance of many micrometers. Its dependence on the magnetic field and temperature agree well with the hydrodynamic theory of spin waves. These results lay the foundation for the quest of spin superfluidity in this high-quality material. The resonant cavity technique we developed offers a powerful and timely method to explore the collective excitation of many spin and isospin-ordered many-body ground states in van der Waals heterostructures and open the possibility of engineering magnonic devices.
description: 17 figures. To appear in PRX
Solar neutrino limit on axions and keV-mass bosons
Creators: name: Gondolo, Paolo
name: Raffelt, Georg
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The all-flavor solar neutrino flux measured by the Sudbury Neutrino Observatory (SNO) constrains nonstandard energy losses to less than about 10% of the Sun's photon luminosity, superseding a helioseismological argument and providing new limits on the interaction strength of low-mass particles. For the axion-photon coupling strength we find g_aγ< 7E-10 1/GeV. We also derive explicit limits on the Yukawa coupling to electrons of pseudoscalar, scalar and vector bosons with keV-scale masses.
description: 4 pages, 1 figure, version accepted by PRD. Results corrected for erroneous axio-electric and Compton cross sections in the literature
Atmosphere of Betelgeuse before and during the Great Dimming event revealed by tomography
Creators: name: Kravchenko, K.
name: Jorissen, A.
name: Van Eck, S.
name: Merle, T.
name: Chiavassa, A.
name: Paladini, C.
name: Freytag, B.
name: Plez, B.
name: Montargès, M.
name: Van Winckel, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Despite being the best studied red supergiant star in our Galaxy, the physics behind the photometric variability and mass loss of Betelgeuse is poorly understood. Moreover, recently the star has experienced an unusual fading with its visual magnitude reaching a historical minimum. We investigate the nature of this event with the help of a recently developed tomographic technique. Tomography allows us to probe different depths in the stellar atmosphere and to recover the corresponding disk-averaged velocity field. We apply the tomographic method to a few-year time-series high-resolution spectroscopic observations of Betelgeuse in order to relate its atmospheric dynamics to the photometric variability. Our results show that a sudden increase of the molecular opacity in the cooler upper atmosphere of Betelgeuse is likely the reason of the observed unusual decrease of the star's brightness.
description: A&A Letters, accepted for publication
The Atiyah-Singer index formula for subelliptic operators on contact manifolds, Part II
Creators: name: van Erp, Erik
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 19K56 (Primary) 58J20, 53D10 (Secondary)

description: We present a new solution to the index problem for hypoelliptic operators in the Heisenberg calculus on contact manifolds, by constructing the appropriate topological K-theory cocycle for such operators. Its Chern character gives a cohomology class to which the Atiyah-Singer index formula can be applied. Such a K-cocycle has already been constructed by Boutet de Monvel for Toeplitz operators, and, more recently, by Melrose and Epstein for the class of Hermite operators. Our construction applies to general hypoelliptic pseudodifferential operators in the Heisenberg calculus. As in the Hermite Index Formula of Melrose and Epstein, our construction gives a vector bundle automorphism of the symmetric tensors of the contact hyperplane bundle. This automorphism is constructed directly from the invertible Heisenberg symbol of the operator, and is easily computed in the case of differential operators.
description: 22 pages; to be published in Annals of Mathematics (submitted 4-14-2006, accepted 4-3-2008); correction of a gap in the proof of Lemma 3 (2-5-2009)
BIOLOGIA E BIOETICA DELLA CRIOPRESERVAZIONE DI OVOCITI E TESSUTO OVARICO NELL'UOMO
Creators: name: Mollo, Valentina
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Nel nostro Paese le tecniche di Procreazione medicalmente assistita (PMA) sono disciplinate dalla legge 40 del2004. Tale legge tra le varie limitazioni, vieta il congelamento embrionario e riduce a 3 il n° di ovociti da inseminare. Ciò determina una diminuzione delle rese % delle tecniche di PMA. Inoltre, grazie agli innumerevoli passi avanti fatti nell’ambito delle cure antitumorali, riuscire a preservare la fertilità delle giovani pazienti è di fondamentale importanza. Pertanto il congelamento di ovociti e tessuto ovarico trova terreno fertile, in quanto sfugge da qualsiasi problema di natura etica. Purtroppo però poco si sa a riguardo della tecnica, di quali siano i protocolli da preferire: infatti manca una specifica e dettagliata ricerca di base. Lo scopo del presente lavoro è quello di studiare gli effetti dei vari protocolli di congelamento già in uso nella clinica medica sugli ovociti, sul tessuto ovarico e sui follicoli, in modo da evidenziare i danni indotti dal congelamento e individuare eventuali modifiche alle biotecnologie applicate. Tali metodiche saranno altresì valutate ed inquadrate da un punto di vista etico-morale.
ENZIMLARNING FAOLLANISH ENERGIYASI. BIOKATALIZATOR – OKSIREDUKTAZALAR
Creators: name: Voxid Baxromovich Fayziyev
name: Ezoza Elmurod Qizi Bekmatova
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: biokatalizator
enzimologiya
ekzergonik reaksiya
faollanish energiyasi
kofaktor
substrat

description: Reaksiyaning faollanish energiyasi qancha yuksak bo’lsa, uning sur’ati ham shuncha sekin va aksincha, faollanish energiyasi qanchalik kam bo’lsa reaksiya ham shu qadar tez boradi. Biokatalizatorlardan hisoblangan oksireduktaza va peroksidazaning vazifasi faollanish enargiyasini pasaytirishdan iborat.
Satsense: a python library for land-use and landcover classification of earth observation data
Creators: name: Andela Bouwe
name: Weel Berend
name: Ranguelova, Elena
name: Drost, Niels
name: Filtenborg, Maximilian
name: Barten, Derk
name: Debraj Roy
name: Lees, Mike
Publisher: name: Zenodo
Year: 2019

description: Satsense is an open source Python library for patch based land-use and land-cover classification, initially developed for a project on deprived neighborhood detection. However, many of the algorithms made available through Satsense can be applied in other domains, such as ecology and climate science
Twistor formulation of massless $6D$ infinite spin fields
Creators: name: Buchbinder, I. L.
name: Fedoruk, S. A.
name: Isaev, A. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct massless infinite spin irreducible representations of the six-dimensional Poincaré group in the space of fields depending on twistor variables. It is shown that the massless infinite spin representation is realized on the two-twistor fields. We present a full set of equations of motion for two-twistor fields represented by the totally symmetric $\mathrm{SU}(2)$ rank $2s$ two-twistor spin-tensor and show that they carry massless infinite spin representations. A field twistor transform is constructed and infinite spin fields are found in the space-time formulation with an additional spinor coordinate.
description: v3: 1+19 pages, minor revision, published version
Theoretical study of dark resonances in micro-metric thin cells
Creators: name: Failache, Horacio
name: Lenci, Lorenzo
name: Lezama, Arturo
name: Bloch, Daniel
name: Ducloy, Martial
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate theoretically dark resonance spectroscopy for a dilute atomic vapor confined in a thin (micro-metric) cell. We identify the physical parameters characterizing the spectra and study their influence. We focus on a Hanle-type situation, with an optical irradiation under normal incidence and resonant with the atomic transition. The dark resonance spectrum is predicted to combine broad wings with a sharp maximum at line-center, that can be singled out when detecting a derivative of the dark resonance spectrum. This narrow signal derivative, shown to broaden only sub-linearly with the cell length, is a signature of the contribution of atoms slow enough to fly between the cell windows in a time as long as the characteristic ground state optical pumping time. We suggest that this dark resonance spectroscopy in micro-metric thin cells could be a suitable tool for probing the effective velocity distribution in the thin cell arising from the atomic desorption processes, and notably to identify the limiting factors affecting desorption under a grazing incidence.
description: 12 pages, 11 figures theoretical article
"La scrittura cinematografica. Le categorie di genere fra cinema e letteratura: il caso Orlando".
Creators: name: Caruso, Giuseppe
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Avvalendosi di strumenti teorici provenienti da differenti ambiti disciplinari quali la semiotica e la psicoanalisi, il presente lavoro intende muoversi seguendo due principali direzioni di ricerca: 1) osservare in che modo determinati dispositivi retorico-formali possano iscrivere la differenza fra le categorie di genere e quali i punti di vista sul rapporto maschile-femminile alcuni film presi in esame nell'arco di tale lavoro veicolerebbero; 2) analizzare l'insieme di teorie elaborate sulla figura della spettatrice, che concepiscono l'identità di genere come specificità fondante/fondativa dell'esperienza spettatoriale. In base alla rilettura dei parametri di analisi, si passa poi ad analizzare un testo che è sembrato rappresentare un esempio paradigmatico dei nuovi scenari identitari posti in evidenza dalle studiose di cinema deegli ultimi anni. L'analisi, infatti, si focalizza sulla lettura comparata fra la trasposizone cinematografica di Orlando, operata nel 1992 dalla regista inglese Sally Potter, e l'originario romanzo del 1928 di Virginia Woolf.
АЁЛ – ОИЛА ҚУРҒОНИНИНГ ҚУРИҚЧИСИ
Creators: name: Дилноза Орзиқуловна Норбоева
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: аёллар ҳуқуқлари
гендер тенлик
сиёсат
оила
ахлоқшунослик жамғармаси

description: Ушбу мақолада бугунги кунда хотин-қизлар хуқуқларини химоя қилиш ва гендер тенгликни таьминлаш борасида юртимизда олиб борилаётган ишлар ёритиб берилган
СУЩЕСТВОВАНИЕ И СВОБОДА ЧЕЛОВЕКА КАК ТВОРЕНИЕ БОГА В ЕВРОПЕЙСКОЙ ФИЛОСОФСКОЙ МЫСЛИ
Creators: name: Камола Усканбаевна Саидова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: человек
существование
свобода
Бог
общество
экзистенциализм
философия
жизнь
природа
государство

description: В статье автором рассматривается и анализируется проблема существования человека в качестве возможного творения Бога, что способно особенным образом отразиться на свободе личности. При этом жизнь человека определяется не только отношением к Богу, но и отношением к обществу. Однако общество путём организация жизни человека способно накладывать ограничения на свободу личности, и потому в общественной сфере человек способен абстрагироваться от самого себя. Очевидным становится то, что конечное назначение человека не социальное, а духовное, и сам человек должен принадлежать не только времени, но и вечности.
Francesco Valenti e la cultura del restauro nel primo Novecento in Sicilia.
Creators: name: Genovese, Maria Carmen
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: La tesi affronta la cultura del restauro del primo Novecento in Sicilia e la figura di Francesco Valenti (1868 – 1953), Soprintendente ai Monumenti dell’isola tra il 1920 ed il 1935. L’obiettivo principale della ricerca è stato l’inquadramento critico della figura di Valenti, che incise fortemente sulla tutela dei monumenti dell’isola, verificandone il ruolo nell’ambito della cultura coeva. L’analisi è condotta attraverso la trattazione di alcuni casi di studio, scelti tra i numerosissimi restauri eseguiti dal Soprintendente; un aspetto importante della ricerca, infine, è costituito dall’analisi critica, svolta attraverso la disamina del ricco patrimonio documentario dell’epoca, della cultura “ingegneristica” di Valenti, espressa attraverso il largo uso del cemento armato nel consolidamento delle architetture siciliane.