cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
STUDY OF THE MORPHOLOGY AND PHYSIOLOGY OF FILAMENTOUS FUNGI DURING NUTRIENT STARVATION USING THE PARALLEL PLATE FLOW CHAMBER
Creators: name: Pollack, Judith Kadarusman
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Engineering, Chemical(0542)
nutrient starvation
morphology
autophagy
branching
Aspergillus

description: Filamentous fungi play important roles in health care, agriculture, and bioprocessing. In many situations, they experience nutrient starvation. In some cases, nutrient starvation detrimentally affects cellular morphology and physiology; in other cases, it can be beneficial. Thus, a better understanding of how starvation influences morphology may result in strategies to control morphology to our advantage. However, little is known about how individual fungal mycelia respond to nutrient starvation at the cellular and molecular level. For studies at the cellular level, we grew fungal mycelia in a parallel plate flow chamber, which allows for complete environmental control while monitoring individual mycelia over time. We discovered that the first response to carbon starvation is cessation of growth (i.e. lag time) before mycelia resume re-growth at a lower rate. During this lag time, vacuolation increases significantly, implying significant cellular restructuring and recycling. We propose a model in which the duration of the lag time is determined by the production rate of endogenous carbon and mycelial size. For studies at the molecular level, we investigated the role of autophagy using a strain of the model fungus Aspergillus nidulans
Suzaku Observation of Diffuse X-ray Emission from the Carina Nebula
Creators: name: Hamaguchi, Kenji
name: Petre, Robert
name: Matsumoto, Hironori
name: Tsujimoto, Masahiro
name: Holt, Stephan S.
name: Ezoe, Yuichiro
name: Ozawa, Hideki
name: Tsuboi, Yohko
name: Soong, Yang
name: Kitamoto, Shunji
name: Sekiguchi, Akiko
name: Kokubun, Motohide
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We studied extended X-ray emission from the Carina Nebula taken with the Suzaku CCD camera XIS on 2005 Aug. 29. The X-ray morphology, plasma temperature and absorption to the plasma are consistent with the earlier Einstein results. The Suzaku spectra newly revealed emission lines from various species including oxygen, but not from nitrogen. This result restricts the N/O ratio significantly low, compared with evolved massive stellar winds, suggesting that the diffuse emission is originated in an old supernova remnant or a super shell produced by multiple supernova remnants. The X-ray spectra from the north and south of Eta Carinae showed distinct differences between 0.3-2 keV. The south spectrum shows strong L-shell lines of iron ions and K-shell lines of silicon ions, while the north spectrum shows them weak in intensity. This means that silicon and iron abundances are a factor of 2-4 higher in the south region than in the north region. The abundance variation may be produced by an SNR ejecta, or relate to the dust formation around the star forming core.
description: 12 pages, 6 figures, accepted to PASJ
КОННОТАТИВНАЯ ЛЕКСИКА В ПРЕПОДАВАНИИ РУССКОГО ЯЗЫКА КАК ИНОСТРАННОГО
Creators: name: Хосият Назаровна Кадырова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: выделение компонентов лексического значения
методики преподавания иностранного языка
стилистике
лексикографии
ибо объектом исследования всех этих дисциплин служат системы двух или более языков. Усвоение нового языка – это процесс более трудоемкий и несравненно более трудный.

description: В современной типологии язык-эталон рассматривается как метаязыковой типологический инвариант, выявляемый на основе языковых универсалий и подразделяется на минимальный и максимальный язык-эталон, а также универсальный и частный язык-эталон. В случае генеалогического родства в результате общности языки систематизируются в «языковые семьи» (группы, макросемьи и т.д.), в случае продолжительных географических и культурных контактов они образуют «языковые союзы».
The Regulation of Cooling and Star Formation in Luminous Galaxies by AGN Feedback and the Cooling-Time/Entropy Threshold for the Onset of Star Formation
Creators: name: Rafferty, David
name: McNamara, Brian
name: Nulsen, Paul
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using broadband optical imaging and Chandra X-ray data for a sample of 46 cluster central dominant galaxies (CDGs), we investigate the connection between star formation, the intracluster medium (ICM), and the central active galactic nucleus (AGN). We report the discovery of a remarkably sharp threshold for the onset of star formation that occurs when the central cooling time of the hot atmosphere falls below ~ 5x10^8 yr, or equivalently when the central entropy falls below ~ 30 keV cm^2. In addition to this criterion, star formation in cooling flows also appears to require that the X-ray and galaxy centroids lie within ~ 20 kpc of each other, and that the jet (cavity) power is smaller than the X-ray cooling luminosity. These three criteria, together with the high ratio of cooling time to AGN outburst (cavity) age across our sample, directly link the presence of star formation and AGN activity in CDGs to cooling instabilities in the intracluster plasma. Our results provide compelling evidence that AGN feedback into the hot ICM is largely responsible for regulating cooling and star formation in the cores of clusters, leading to the significant growth of supermassive black holes in CDGs at late times.
description: 19 pages, 12 figures. Accepted for publication in ApJ. New version includes our response to minor but helpful comments by the referee. The abstract and title have been edited to better reflect the major results of the paper
Non-collinear ground state from a four-spin chiral exchange in a tetrahedral magnet
Creators: name: Ado, I. A.
name: Tchernyshyov, O.
name: Titov, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a quartic chiral term $m_x m_y m_z \nabla \cdot \mathbf{m}$ for the energy density of a cubic ferromagnet with broken parity symmetry (point group $T_d$). We demonstrate that this interaction causes a phase transition from a collinear ferromagnetic state to a non-collinear magnetic cone ground state provided its strength exceeds the geometric mean of magnetic exchange and cubic anisotropy. The corresponding non-collinear ground state may also be additionally stabilized by an external magnetic field pointing along certain crystallographic directions. The four-spin chiral exchange does also manifest itself in peculiar magnon spectra and favors spin waves with the wave vector that is perpendicular to the average magnetization direction.
description: 8 pages
The Development, Validation, And Pilot Testing of an Instrument for Coding the Client Experience of Being Listened To
Creators: name: Earley, Michael Daniel
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: alliance
coding system
empathy
listening
psychotherapy

description: In addition to empathy, warmth, and genuineness, all psychological orientations emphasize the essential role that quality listening plays in successful therapy.  However, while such therapeutic factors are universally held to be important, few tools have been designed to assess the quantity and quality of these variables.  Therefore, the present research developed a novel psychotherapy coding tool designed to reliably assess the presence or absence of data reflecting the client's experience of quality listening.  By creating new video-taped brief intervention sessions, this project produced both novel counseling material to code and also post-session assessment data to compare to resulting coding system scores.  The Experience of Being Listened To coding system was found to have excellent interrater reliability, with an ICC of .88.  The system was also moderately correlated with post sessions measures of working alliance and regard.  This coding system adds to the ability of researchers, clinicians, and trainers to evaluate the extent of quality listening, in session, with the intent of modifying in-session therapist behaviors to improve the client's experience of listening in therapy.
APPROACH TO UNWRAP A 3D FINGERPRINT TO A 2D EQUIVALENT FINGERPRINT
Creators: name: Dighade, Ravikiran Ramdas
Publisher: name: Maryland Shared Open Access Repository
Year: 2012

description: Fingerprints are the most widely used biometric feature for human identification because of their accuracy and uniqueness. Traditional fingerprint acquisition techniques are contact based and result in poor quality images. The new generation of non-contact based scanners capture high resolution and detailed 3D fingerprint scans, which addresses many of the problems of traditional fingerprint acquisition techniques. The majority of existing fingerprint databases available today are 2D, so there is a need for backward compatibility for the 3D scans captured. In order to solve this interoperability issue, I present an algorithm to unwrap the 3D fingerprint to its 2D equivalent image to be used in an Automatic Fingerprint Identification System.
Skin tone, Socioeconomic Status, and Ambulatory Blood Pressure among African-Americans: The Racism, Coping, and Ambulatory Blood Pressure Study
Creators: name: Taylor, Antione
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: Ambulatory blood pressure
Discrimination
Gender
Skin tone
Socioeconomic status

description: The purpose of the present study was to examine the potential relation between skin tone and ambulatory blood pressure (ABP), and if this relation was moderated by socioeconomic status (SES) among participants enrolled in the Racism, Coping, and Ambulatory Blood Pressure Study. 332 participants aged to 65 years old (M = 40 years, SD = 9.40). The main analyses consisted of multiple regressions with skin tone as a predictor of ABP (24hr, daytime, nighttime and dipping blood pressure). The main analyses also consisted of interactions of skin tone and SES indicators (poverty level, education and a composite) as predictors of ABP. Additional exploratory analyses investigated a three-way interaction between skin tone, SES indicators and gender as predictors of ABP. Controlling for standard cardiovascular risk factors, results indicated no association between skin tone and ABP or an interaction effect between skin tone and the SES indicators. However, controlling for standard cardiovascular risk factors, results indicated complex associations between skin tone, the SES indicators and gender as predictors of ABP. It is concluded that the relation between skin tone, SES indicators and gender as predictors of ABP is complex and may support the notion that the social experience at various permutations of these predictors may distinctly differ and affect ABP.
An old stellar population or diffuse nebular continuum emission discovered in green pea galaxies
Creators: name: Clarke, Leonardo
name: Scarlata, Claudia
name: Mehta, Vihang
name: Keel, William C.
name: Cardamone, Carolin
name: Hayes, Matthew
name: Adams, Nico
name: Dickinson, Hugh
name: Fortson, Lucy
name: Kruk, Sandor
name: Lintott, Chris
name: Simmons, Brooke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use new HST images of nine Green Pea Galaxies (GPGs) to study their resolved structure and color. The choice of filters, F555W and F850LP, together with the redshift of the galaxies ($z\sim 0.25$), minimizes the contribution of the nebular [O\thinspace{\sc iii}] and H$α$ emission lines to the broad-band images. While these galaxies are typically very blue in color, our analysis reveals that it is only the dominant stellar clusters that are blue. Each GPG does clearly show the presence of at least one bright and compact star-forming region, but these are invariably superimposed on a more extended and lower surface brightness emission. Moreover, the colors of the star forming regions are on average bluer than those of the diffuse emission, reaching up to 0.6 magnitudes bluer. Assuming that the diffuse and compact components have constant and single burst Star Formation Histories, respectively, the observed colors imply that the diffuse components (possibly the host galaxy of the star-formation episode) have, on average, old stellar ages ($>1$Gyr), while the star-clusters are younger than 500Myrs. We also discuss the possibility that the diffuse red emission is due to a varying relative contribution of nebular continuum, rather than a different stellar population. With the available data, however, it is not possible to distinguish between these two interpretations. A substantial presence of old stars would indicate that the mechanisms that allow large escape fractions in these local galaxies may be different from those at play during the reionization epoch.
description: 10 pages, 4 figures, submitted to ApJL
Bäcklund transformations for the constrained dispersionless hierarchies and dispersionless hierarchies with self-consistent sources
Creators: name: Xiao, Ting
name: Zeng, Yunbo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Bäcklund transformations between the constrained dispersionless KP hierarchy (cdKPH) and the constrained dispersionless mKP hieararchy (cdmKPH) and between the dispersionless KP hieararchy with self-consistent sources (dKPHSCS) and the dispersionless mKP hieararchy with self-consistent sources (dmKPHSCS) are constructed. The auto-Bäcklund transformations for the cdmKPH and for the dmKPHSCS are also formulated.
description: 11 pages
Direct numerical simulation of an evaporating turbulent diluted jet-spray at moderate Reynolds number
Creators: name: Wang, Jietuo
name: Barba, Federico Dalla
name: Picano, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The evaporation of dispersed, liquid droplets in jet-sprays occurs in several industrial applications and in natural phenomena. Despite the relevance of the problem, a satisfactory comprehension of the mechanisms involved has not still be achieved because of the wide range of turbulent scales and the huge number of droplets involved. In this context, we address a DNS of a turbulent jet spray at relatively high Reynolds number, i.e. Re=10,000. We focus on the effect of the jet Re on the evaporation process and the preferential segregation of droplets, comparing the outcomes also with a DNS at lower Reynolds number, Re = 6,000, in corresponding conditions. The problem is addressed in the hybrid Eulerian-Lagrangian framework employing the point-droplet approximation. Detailed statistical analysis on both the gas and dispersed phases are presented. We found that the droplet vaporization length grows as the bulk Re is increased from Re = 6,000 to Re = 10,000 keeping other conditions fixed. We attribute this result to the complex interaction between the inertia of the droplets and the turbulent gaseous phase dynamics. In particular, at higher Re, the slower droplet mass transfer is not able to comply with the faster turbulent fluctuations of the mixing layer that tend to fasten the process. We also found an intense droplet clustering which is originated by entrainment of dry air in the mixing layer and intensified by the small-scale clustering mechanism in the far-field region. We will show how clustering creates a strongly heterogeneous droplet Lagrangian evolution. All these aspects contribute to the Re dependence of the overall droplet evaporation rate. Finally, we discuss the accuracy of the d-square law, often used in spray modeling, for present cases. We found that using this law based on environmental conditions the droplet evaporation rate is overestimated.
description: 18 pages, 13 figures
ANDROID MALWARE DETECTION AND CLASSIFICATION USING MACHINE LEARNING TECHNIQUES
Creators: name: Padalkar, Satyajit
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: Andriod Malwares
Machine Learning
Stacked Denoising Autoencoder

description: Android is popular mobile operating system and there are multiple marketplaces for android applications. Most of these market places allow applications to be signed using self-signed certificates. Due to this practice there exists little or very limited control over the kind of applications that are being distributed. Also advancement of android root kits is making it increasingly easier to repackage existing android applications with malicious code. Conventional signature based techniques fail to detect these malwares. So detection and classification of android malwares is a very difficult problem to solve. We present a method to classify and detect such malwares by performing dynamic analysis of the system call sequences. Here we make use of machine learning techniques to build multiple models using distributions of syscalls as features. Using these models we predict whether given application is malicious or benign. Also we try to classify given application to specific known malware family. We also explore deeplearning methods such as stacked denoising autoencoder (SdA) algorithms and its effectiveness. We experimentally evaluate our methods using a real dataset of 600 malicious applications spread across 38 malware families along with 25 popular benign applications from various areas. We find that deeplearning algorithm (SdA) is most accurate in detecting a malware with lowest false positives while AdaBoost performs better in classifying a malware family.
UMUMIY O'RTA TA'LIM MAKTABLARIDA MATEMATIKANI O'QITISHNING O'QUVCHILARNI TARBIYALOVCHI AHAMIYATI
Creators: name: Razokova, Nargiza Kamarovna
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: iqtisodiy masala
diagramma
geometriya
mavhumlik
krvadrat tenglama
teorema
koordinatalar sistemasi
aylana

description: Ushbu maqolada matematika o‟qitish orqali o‟quvchilarni o‟z o‟rnini anglashi, yurt ravnaqi yo‟lida harakat qila olishni ko‟rsatishdir. Bunda o‟qituvchi o‟z ustida ishlashi, matematika sohasidagi fan taraqqiyotiga hissa qo‟shishi tenglama va teoremalarga oid g‟oyalarini va hakazolarni kengaytirishi lozim
Relation of Need for Cognition to Intention to Enter the Professoriate and Graduate Program Level and Field
Creators: name: Mahdi, Tahira Chloe
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: graduate education
need for cognition
professoriate

description: Research shows that need for cognition, a construct that reflects enjoyment of and inclination to engage in effortful cognitive activity, has implications for academic achievement and career choice.  These studies, including those demonstrating need for cognition's significant, positive relation to level of education and to course grades, have typically involved college undergraduates.  The present study used a graduate student sample to examine the relation of need for cognition to graduate level of education (master's versus Ph.D.), field of study (Science, Technology, Engineering, and Math [STEM] versus non-STEM), and desire to enter the professoriate.  Results indicated no significant between-group differences in need for cognition among primary variables, but secondary analyses yielded differences based on ethnicity, as well as significant relations among other variables, such as interest in the professoriate, age, and field of study.  Implications include the need to examine perceptions of faculty careers among STEM graduate students and the value of exploring multicultural interpretations of the Need for Cognition Scale.
Asymptotic behaviour of randomly reflecting billiards in unbounded tubular domains
Creators: name: Menshikov, Mikhail V.
name: Vachkovskaia, Marina
name: Wade, Andrew R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60J25, 60J05 (Primary); 60F15, 60G17, 37D50, 82C40 (Secondary)

description: We study stochastic billiards in infinite planar domains with curvilinear boundaries: that is, piecewise deterministic motion with randomness introduced via random reflections at the domain boundary. Physical motivation for the process originates with ideal gas models in the Knudsen regime, with particles reflecting off microscopically rough surfaces. We classify the process into recurrent and transient cases. We also give almost-sure results on the long-term behaviour of the location of the particle, including a super-diffusive rate of escape in the transient case. A key step in obtaining our results is to relate our process to an instance of a one-dimensional stochastic process with asymptotically zero drift, for which we prove some new almost-sure bounds of independent interest. We obtain some of these bounds via an application of general semimartingale criteria, also of some independent interest.
description: 41 pages, 5 figures; v3: some typos corrected
Plunging in the Dirac sea using graphene quantum dots
Creators: name: Fillion-Gourdeau, F.
name: Levesque, P.
name: MacLean, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The dynamics of low energy charge carriers in a graphene quantum dot subjected to a time-dependent local field is investigated numerically. In particular, we study a configuration where a Coulomb electric field is provided by an ion traversing the graphene sample. A Galerkin-like numerical scheme is introduced to solve the massless Dirac equation describing charge carriers subjected to space- and time-dependent electromagnetic potentials and is used to evaluate the field induced interband transitions. It is demonstrated that as the ion goes through graphene, electron-hole pairs are generated dynamically via the adiabatic pair creation mechanism around avoided crossings, similar to electron-positron pair generation in low energy heavy ion collisions.
description: 16 pages, 9 figures
ДАВЛАТЛАРНИНГ ИЧКИ ИШЛАРИГА АРАЛАШМАСЛИК ТАМОЙИЛНИНГ ХАЛҚАРО ҲУҚУҚИЙ ТАВСИФИ
Creators: name: Саттаров, Д.
Publisher: name: Zenodo
Year: 2024

description: Мазкур мақолада  давлатларнинг ички ишларига аралашмаслик тамойилнинг халқаро‑ҳуқуқий тавсифи билан боғлиқ масалалар таҳлил этилган. Шунингдек, мақолада халқаро ҳуқуқ тамойиллари  жаҳон ҳамжамиятининг тинчлик ва хавфсизлигини таъминлаш, глобаллашув жараёнларининг салбий ҳодисалардан ҳоли бўлишига эришишда муҳим аҳамиятига эга эканлиги баён этилган.
ТАЪЛИМ СОҲАСИДА ЭЛЕКТРОН ТАЪЛИМ ТРЕНАЖЁРЛАРИДАН ФОЙДАЛАНИШ МУАММОЛАРИ ВА САБАБЛАРИ
Creators: name: Суннат Ҳатамович Қосимов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Замонавий педагoгик технологиялар
замонавий ахборот технологиялари
илмий ва ўкув-методик
ихтиро
таълим
дидактик
касб махорати

description: Мақолада таълим сохасида электрон таълим тренажѐрларидан фойдаланиш тарихи унинг муаммолари сабаблари кўрсатилиб ўтилган. Шу билан бирга ушбуларни амалга оширишда ўқитишни такомиллаштириш, яъни янги педагогик технологияларни ўқув жараѐнига тарғиб қилиш, компьютерли автоматлаштирилган ўқитиш тизимини таълимда қўллаш лозимлиги ѐритилган
Analyzing the Growth of Hoeffding Trees
Creators: name: Sawhney, Mayank
Publisher: name: Maryland Shared Open Access Repository
Year: 2011
Subjects: Data Stream
Hoeffding Tree

description: Mining high speed data streams has become a necessity because of the enormous growth in the volume of electronic data. In the past decade, researchers have suggested various models for learning both stationary and concept drifting data streams. Hoeffding Trees (Domingos & Hulten 2000) are one such model for mining stationary data streams. Several modifications of the naive Hoeffding Tree algorithm have been proposed to study data streams. Our work analyzes the behavior of Hoeffding Trees when they are trained on infinite and non-drifting data streams. Through a series of experiments, we show that the Hoeffd-ing bound suffers from an inherent shortcoming of unbounded growth. Even after reaching a stage where accuracy asymptotes, Hoeffding Trees continue to grow. We examine this behavior in streams having both nominal and numeric attributes. We also study enhance-ments made to the naive Hoeffding Tree algorithm and also evaluate different discretization methods. We use the Massive Online Analysis framework for our experiments.  In our work, we analyze how the Hoeffding bound relates to the information gain when splits are made and also when we send a random distribution as a data stream. We conclude that this behavior is a result of decisions made for the early growth of Hoeffding Trees and the randomness induced by discretization of attributes in an online setting. We also argue that presence of this behavior will impact the use of Hoeffding tree-based algorithms in real world online applications.
Stellar Initial Mass Function over a range of redshifts
Creators: name: Riaz, Rafeel
name: Schleicher, Dominik R. G.
name: Vanaverbeke, Siegfried
name: Klessen, Ralf S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The stellar Initial Mass Function (IMF) seems to be close to universal in the local star-forming regions. However, this quantity of a newborn stellar population responds differently at gas metallicities $Z \sim$ $Z_\odot$ than $Z$ = 0. A view on the cosmic star formation history suggests that the cooling agents in the gas vary both in their types and molecular abundances. For instance, in the primordial gas environment, the gas temperature can be higher by a factor of 30 as compared to the present day. Stellar radiation feedback and cosmic microwave background (CMB) radiation may even contribute towards increasing the floor temperature of the star-forming gas which subsequently can leave profound impacts on the IMF. We present the contribution of the radiation sources towards the thermodynamical evolution of the Jeans unstable gas cloud which experiences fragmentation and mass accretion. We find evidence which suggests that the latter becomes the dominant process for star formation efficiencies (SFE) above 5 - 7 %, thus increasing the average mass of the stars. We focus on the isolated and binary stellar configurations emerging during the gas collapse. The binary fraction on average remains 0.476 and contributes significantly towards the total SFE of 15 %.
description: Accepted for publication in Astronomische Nachrichten. 6 pages, 5 figures, and 1 table. arXiv admin note: text overlap with arXiv:2003.07639
Base de Datos de artículos sobre RSL
Creators: name: Alfaro, Ramiro
name: Pereda, Ana
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 461103
subject: Deep learning

description: Base de datos en ZOTERO, que contiene artículos sobre la investigación de Machine Learning para detección fraudulenta en transacciones en línea: Una revisión sistemática de la literatura.
Quantum study of information delay in electromagetically induced transparency
Creators: name: Hsu, Magnus T. L.
name: Hetet, Gabriel
name: Glockl, Oliver
name: Longdell, Jevon J.
name: Buchler, Ben C.
name: Bachor, Hans-A.
name: Lam, Ping Koy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using electromagnetically induced transparency (EIT), it is possible to delay and store light in atomic ensembles. Theoretical modelling and recent experiments have suggested that the EIT storage mechanism can be used as a memory for quantum information. We present experiments that quantify the noise performance of an EIT system for conjugate amplitude and phase quadratures. It is shown that our EIT system adds excess noise to the delayed light that has not hitherto been predicted by published theoretical modelling. In analogy with other continuous-variable quantum information systems, the performance of our EIT system is characterised in terms of conditional variance and signal transfer.
description: 4 pages, 4 figures
Refinement of a Food Allergy Knowledge Test
Creators: name: Hahn, Amy
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: food allergy
knowledge
measurement
pediatrics

description: For parents of children with food allergy, illness knowledge includes a detailed understanding of the diagnosis, treatment, and responses to allergen exposure. Illness knowledge is essential for proper management of food allergy, especially due to its potentially life-threatening nature. Food allergy knowledge is a key concept for this chronic illness population. The current study aimed to contribute such a tool to the literature by building on a past study (Hahn, Dahlquist, & Bollinger, 2011) in which a food allergy test (The FAKT) was developed following rigorous measurement guidelines. The current study further developed this measure by testing it on a representative sample and, through revisions, established a final version of the test. The final version of the FAKT was determined to have strong psychometrics, as well as determined to be appropriately reliable and valid.
Letter from the Land Registry Office to I. H. Hallot Esq, Barrister & Co., April 10, 1909
Creators: name: Land Registry Office
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to I. H. Hallot Esq, Barrister & Co. from the Land Registry Office, dated April 10, 1909, regarding Rainbow Ranche, a receipt, and fees.
AQLI ZAIF BOLALARGA MATEMATIKANI O'QITISH XUSUSIYATLARI
Creators: name: Razokova, Nargiza Kamarovna
name: Bahtiyor Iskandarovich Ashurov
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: inklyuziv ta’lim
aqli zaif bolalarga matematikani o’rgatish

description: Maqolada ta’lim jarayonida innovatsion va ilg’or xorijiy tajribalarni qo’llashning yutuq va kamchiliklari intellektual nuqsonli bolalarni o’qitish jarayoni va xususan, boshlang’ich matematik tushunchalarni shakllantirish jarayoni o’ziga xos xususiyatlarini qullashning yutuq va kamchiliklari tahlil qilinib, ta’lim tizimida pedagogik texnologiyalarni qo’llash samaradorligini oshirish maqsadida takliflar berilgan
Circular Orbits Structure and Thin Accretion Disks around Kerr Black Holes with Scalar Hair
Creators: name: Collodel, Lucas G.
name: Doneva, Daniela D.
name: Yazadjiev, Stoytcho S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we first investigate the equatorial circular orbit structure of Kerr black holes with scalar hair (KBHsSH) and highlight their most prominent features which are quite distinct from the exterior region of ordinary bald Kerr black holes, i.e. peculiarities that arise from the combined bound system of a hole with an off-center, self-gravitating distribution of scalar matter. Some of these traits are incompatible with the thin disk approach, thus we identify and map out various regions in the parameter space respectively. All the solutions for which the stable circular orbital velocity (and angular momentum) curve is continuous are used for building thin and optically thick disks around them, from which we extract the radiant energy fluxes, luminosities and efficiencies. We compare the results in batches with the same spin parameter $j$ but different normalized charges, and the profiles are richly diverse. Because of the existence of a conserved scalar charge, $Q$, these solutions are non-unique in the $(M, J)$ parameter space. Furthermore, $Q$ cannot be extracted asymptotically from the metric functions. Nevertheless, by constraining the parameters through different observations, the luminosity profile could in turn be used to constrain the Noether charge and characterize the spacetime, should KBHsSH exist.
ОСОБЕННОСТИ МЕТОДИКИ ОБУЧЕНИЯ
Creators: name: М. М. Рахимов
name: Б. Ж. Мамбетов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Методы
интелектуальная подготовка
техника
задача
средства
этап
фазы
осанка
упражнение
двигательное
действия

description: Направленностъ к вышим достижениеям как принцып спортивной тренировки проявляется в стремлении спортсменов к максимально доступному для него результату в избранном виде спорта
Spaces of elliptic differentials
Creators: name: Schmoll, Martin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 14H15, 14H52, 30F30, 30F60, 37C35, 58D15, 58D27

description: We study modular fibers of elliptic differentials, which are roughly spaces of torus-coverings over a fixed base torus. For genus 2 torus covers with fixed degree we show, that the modular fibers F_d(1,1) are itself connected torus covers with Veech group SL_2(Z). Using results of Eskin, Masur and Schmoll we calculate the Euler Characteristic and the parity of the spin structure of the quadratic differential (F_d(1,1)/(-id),q_d). We state and apply formulas for the asymptotic quadratic growth rates of various types of geodesic segments on a surface S "contained" in F_d(1,1). The quadratic growth rates are expressed in terms of the SL_2(Z) orbit closure of S \in F_d(1,1) and the flat geometry of F_d(1,1).
description: 18 pages, 3 figures, published. Slightly improved version with updated references
ЎЗБЕКИСТОНДАГИ ҚАДИМИЙ МАҲАЛЛИЙ БУҒДОЙ НАВЛАРИНИ ГЛИАДИН ОҚСИЛЛАРИ ПОЛИМОРФИЗМИ
Creators: name: Мохинур Бахтияр Қизи Алимова
name: Ойбек Эгамберди Ўғли Холлиев
name: Саидмурод Кимсанбаевич Бабоев
name: Акмал Қаландар Ўғли Буронов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: қадимий маҳаллий буғдой
электрофарез
глиадин

description: Мақолада 31 та қадимий маҳаллий буғдой навларини глиадин оқсилларининг электрофоретик спектрлари бўйича 25 таси гамоген бўлиб, улардан 6 таси гетероген эканлиги аниқланган тадқиқот натижалари келтирилган
Randomized Trial of Common Elements Training in School Mental Health Care: Clinician Knowledge, Attitudes, and Practice
Creators: name: Connors, Elizabeth Halsted
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: Common Elements
dissemination
empirically-supported treatment
school mental health
workforce development

description: Empirically-supported treatments (ESTs) consistently outperform usual care in efficacy trials, but transportability to real world settings has been historically poor. The current study examined the impact of different training methods for the Common Elements approach to ESTs on school mental health (SMH) clinicians' knowledge, attitudes and use of empirically supported techniques. Random assignment of 45 SMH clinicians to one of two conditions for training in the Common Elements approach to ESTs as compared to 36 clinicians trained in a prevention program revealed within-group improvements in knowledge and familiarity with empirically supported techniques. Neither clinician attitudes toward nor self-reported use of ESTs changed over time; mean attitude scores were very positive at baseline. Between-group differences were not detected, perhaps as a function of group contamination. Qualitative interview data suggest that adoption and implementation of ESTs are more complex than existing literature indicates. The resulting grounded theory includes contextual factors of the clinicians' experience and SMH care setting which influence adoption and implementation among all training groups.
Temperature structure of the intergalactic medium within seven nearby and bright clusters of galaxies observed with XMM-Newton
Creators: name: Bourdin, H.
name: Mazzotta, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We map the temperature structure of the intra-cluster medium (ICM) within a nearly complete X-ray flux limited sample of galaxy clusters in the redshift range z=[0.045,0.096]. Our sample contains seven bright clusters of galaxies observed with XMM-Newton: Abell 399, Abell 401, Abell 478, Abell 1795, Abell 2029, Abell 2065, Abell 2256. Methods. We use a multi-scale spectral mapping algorithm especially designed to map spectroscopic observables from X-ray extended emission of the ICM. Derived from a former algorithm using Haar wavelets, our algorithm is now implemented with B-spline wavelets in order to perform a more regular analysis of the signal. Results. For the four clusters in our sample that are major mergers, we find a complex thermal structure with strong thermal variations consistent with their dynamics. For two of them, A2065 and A2256, we perform a 3-d analysis of cold front features evidenced from the gas temperature and brightness maps. Furthermore, we detect a significant non-radial thermal structure outside the cool core region of the other 3 more "regular" clusters, with relative amplitudes of about about 10%. We investigate possible implications of this structure on the mass estimates of the "regular" clusters A1795 and A2029, by extracting surface brightness and temperature profiles from sectors correspondings to the hottest and coldest regions in the maps. While compensating with surface brightness for A2029, leading to consistent mass profiles, the temperature structure leads to significant mass discrepancies in the innermost region of A1795.
description: published in A&A
TRANSLATION PROBLEMS OF PHRASAL VERBS
Creators: name: Dilafruz Razzakberdiyevna Umarova
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: phrasal verb
target language
source language
equivalency
translating strategies
idiomatic phrasal verbs

description: This article is devoted to a very current theme about the translating of English phrasal verbs to Uzbek. Translating of English phrasal verbs is very important part of the science of translation because it couldn't be a real good correct translation without correct translating of the phrasal verbs. Translation is a complicated phenomenon involving linguistics, psychological culture, literary and other factors. Different aspects of translation can be studied with the methods of the respective sciences. Up to date most of theoretical research of translation has been done with the frameworks of linguistics.
Pseudogap behaviour in Bi2212: Results of Generalized DMFT Approach
Creators: name: Kuchinskii, E. Z.
name: Nekrasov, I. A.
name: Pchelkina, Z. V.
name: Sadovskii, M. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: To describe pseudogap regime in Bi2212 we employ novel generalized ab initio LDA+DMFT+Sigma_k hybrid scheme. This scheme is based on the strategy of one of the most powerfull computational tool for real correlated materials LDA+DMFT. Here the LDA+DMFT equations are supplied by an additional (momentum dependent) self-energy Sigma_k in the spirit of our recently proposed DMFT+Sigma_k approach, accounting for pseudogap fluctuations. In the present model Sigma_k describes non-local correlations induced by short-ranged collective Heisenberg-like antiferromagnetic spin fluctuations. The effective single impurity problem of the DMFT is solved by NRG. Material specific model parameters for effective x2-y2 orbital of Cu-3d shell of Bi2212 compound, e.g. hopping integrals, local Coulomb interaction U and pseudogap potential Delta were obtained within LDA and LDA+DMFT. We report theoretical LDA+DMFT+Sigma_k quasiparticle bands dispersion and damping, Fermi surface renormalization, momentum anisotropy of (quasi) static scattering, densities of states, spectral densities and angular resolved photoemission (ARPES) spectra accounting for pseudogap and bilayer splitting effects for normal (slightly) underdoped Bi2212 (delta=0.15). We show that LDA+DMFT+Sigma_k successfully describes strong (pseudogap) scattering close to Brillouin zone boundaries. Our calculated LDA+DMFT+Sigma_k Fermi surfaces and ARPES spectra in presence of the pseudogap fluctuations are almost insensitive to the bilayer splitting strength. The LDA-calculated value of bilayer splitting is found to be rather small to describe experimentally observed peak-dip-hump structure.
description: 11 pages, 10 figures, 1 table
Spin injection characteristics of Py/graphene/Pt by gigahertz and terahertz magnetization dynamics driven by femtosecond laser pulse
Creators: name: Idzuchi, H.
name: Iihama, S.
name: Shimura, M.
name: Kumatani, A.
name: Mizukami, S.
name: Chen, Y. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin transport characteristics of graphene has been extensively studied so far. The spin transport along c-axis is however reported by rather limited number of papers. We have studied spin transport characteristics through graphene along c-axis with permalloy(Py)/graphene(Gr)/Pt by gigahertz (GHz) and terahertz (THz) magnetization dynamics driven by femtosecond laser pulses. The relatively simple sample structure does not require electrodes on the sample. The graphene layer was prepared by chemical vapor deposition and transferred on Pt film. The quality of graphene layer was characterized by Raman microscopy. Time resolved magneto-optical Kerr effect is used to characterize gigahertz magnetization dynamics. Magnetization precession is clearly observed both for Pt/Py and Pt/Gr/Py. The Gilbert damping constant of Pt/Py was 0.015, indicates spin pumping effect from Py to Pt. The Gilbert damping constant of Pt/Gr/Py is found to be 0.011, indicates spin injection is blocked by graphene layer. We have also performed the measurement of THz emission for Pt/Py and Pt/Gr/Py. While the THz emission is clearly observed for Pt/Py, a strong reduction of THz emission is observed for Pt/Gr/Py. With these two different experiments, and highly anisotropic resistivity of graphite, we conclude that the vertical spin transport is strongly suppressed by the graphene layer.
description: Submitted to AIP adv (MMM)
“GARRI POTTER” ASARIDA FANTASTIK OBRAZLAR TAHLILI
Creators: name: Saidova, Nozima Axrorovna
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: fentezi
komik
gotik
kentavr
elf
mifologiya
suv parisi
sirena
goblin

description: Ushbu maqolada fentezi janriga ta‘rif berilib, ushbu janrning turlari hamda eng mashhur na‘munalari qayd etilgan va butun dunyo yozuvchilarining fantaziya janri haqida bildirgan fikrlari aks ettirilgan. Shuningdek, fentezi janriga oid asarlarda tilga olinadigan jonzotlarga qisqacha tavsif berilib, turli manbalardagi tashqi ko‘rinishlari solishtirilib, Joan Rouling asaridagi obrazlari bilan ham taqqoslangan
PROJECT-BASED LEARNING IN EFL CLASSES
Creators: name: Razova, Akhsingul
Publisher: name: Zenodo
Year: 2024

description: This article covers the theoretical background of Project-based learning as well as its benefits and drawbacks of implementing in English classrooms. Contemporary implementations of PBL becomes widespread in general education, especially in EFL (English as a Foreign Languages) classes not only to provide innovative English language acquisition through PBL but also to equip learners with 21st century skills, such as communicative competence, critical thinking, life-long learning, team-working and problem-solving skills.
ҒЎЗАНИНГ УРУҒЛИК ЧИГИТЛАРИНИНГ САҚЛАШ МУДДАТИНИ УНУВЧАНЛИГИГА ТАЪСИРИ
Creators: name: Б. Набиев
name: Н. Мирхомидова
name: Х. Эгамов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: селекция
уруғчилик
пахта
ғўза
чигит
тола
микронейр
вильвет доскасида
вариант
қайтариқ
дурагай

description: Ушбу мақолада ғўзанинг уруғлик чигитларининг сақлаш муддатини унувчанлигига таъсири ўрганилган. Жумладан Андижон-37 навини бир йил сақланган уруғлик чигитлари унувчанлиги 94, % бўлган бўлса, икки йил сақланганда белги кўрсаткичи тажрибада ўрганилган бошқа навларга нисбатан юқори бўлганлиги кузатилди ва 98,0 % га тенг бўлган
The carbon and nitrogen isotopic compositions of particulate organic matter in the subarctic northeast Pacific Ocean
Creators: name: Wu, Jinping
Publisher: name: University of British Columbia
Year: 2009

description: The aim of this study was to determine the variations of δ¹³C and δ¹⁵N of particulate organic matter (POM) and the factors that control the isotopic fractionation from inorganic substrates to zooplankton and lead to variations in the isotopic composition of suspended and sinking POM in the subarctic northeast Pacific Ocean. Along a transect from Station L (48°39'N, 126°40'W) to Station P (50°N, 145°W), surface δ¹⁵NO₃⁻ decreased from 11.2‰ to 7.6‰, while [NO₃⁻] increased from 3 to 12 pM. The δ¹⁵N trends for bulk POM, < 5 pm POM, 50-253 pm POM, < 253 pm POM and zooplankton were similar to that for nitrate. The fractionation factor (e) for the nitrogen isotopes was 5‰. Trophic enrichment of ¹⁵N was observed with mesozooplankton being isotopically heavier than suspended POM by 3.9‰ at Station P and 2.2‰ at Station L. The range of δ¹⁵N among six zooplankton groups was 3.7‰. At Station P, sinking δ¹³C[sub POM] and δ¹⁵N[sub POM] at 3800 m between 1982 and 1990 show significant annual changes. The δ¹³C[sub POM] ranges from -25.3‰ to -22.0‰ and the δ¹⁵N[sub POM] ranges from 10.2‰ to 7.7‰, isotopically depleted values occurring in summer and heavier values occurring in winter. The change in trophic length may be the principal controlling factor of the variations. The δ¹³C[sub POM] at 200,1000 and 3800 m show a ¹³C enrichment with depth. Suspended POM δ¹³C and δ¹⁵N increased with depth and were higher than those of sinking POM, suggesting that the two types of POM did not interact in deep water. At Station L, high frequency variations of δ¹³C and δ¹⁵N in summer are due to the periodic injection of subsurface nitrate by upwelling, which leads to diatom blooms, resulting in a heavier δ¹³C and a lighter δ¹⁵N in sinking POM. The sinking δ¹⁵N[sub POM] value (8%c) is much heavier than that of nitrate (4%c) at 500 m, suggesting that the lateral input of lower nitrate δ¹⁵N from the open ocean (3‰) was important. This study develop our understanding of the isotopic biogeochemistry of carbon and nitrogen in the ocean.
ЎҚИТИШДА ТАЖРИБАЛАР: СОДДАЛИК ВА ҚИЗИҚАРЛИЛИК
Creators: name: Р. Жўрақулов
name: З. Запаров
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Ўқитиш
тажриба
соддалик
қизиқарлилик
дарслик
умумийлик
хусусийлик
сонли қаторлар
эҳтимоллик тушунчаси

description: Мақолада математикaфанларини ўқитиш, ўргатиш масалалари муҳокама қилинади. Математик мавзу ва тушунчаларнинг ўқувчи ва талабалартомонидан осонроқ ўзлаштиришлари ҳамда уларнинг қизиқишларини орттириш ҳақида гап боради