cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phenomena in unconventional superconductivity : d-wave quasiparticles, pseudogap, QED₃ theory and Andreev edge states
Creators: name: Pereg-Barnea, Tamar
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is composed of four research projects on phenomena in unconventional superconductivity. The first three projects are concerned with high T[sub c] superconductivity (HTSC) in cuprates and the fourth discusses the newly discovered superconductivity in the cobaltate system. The first project presents a calculation of various correlation functions in the pseudogap (PSG) phase of the cuprates in the frame work of the QED₃ theory. The low energy behaviour of many of the quantities is similar to that of the superconducting state. In contrast, the staggered spin susceptibility has an anomalous dimension, leading to a divergent susceptibility as the system approaches half filling, indicating an instability towards antiferromagnetism. The second project demonstrates the possibility of coexistence of antiferromagnetism and superconductivity in the QED₃ model. The gauge fluctuations, encoding the quantum fluctuations of vortices dynamically generate a fermionic mass that corresponds to antiferromagnetic ordering. This phenomenon, known as chiral symmetry breaking, is found even when the gauge fluctuations are gapped by a small gauge field mass. This result is in agreement with experimental detection of magnetic order below T[sub c] . The third project in this thesis is a proposal for a test of the origin of the pseudogap phenomenon. It distinguishes between a scenario of competing orders and phase fluctuations. Our work discusses the fundamental difference between charged excitations in a superconducting medium and excitations in the presence of some other order parameter in the particle-hole channel. We find that quasiparticle interference due to scattering by an impurity can display this fundamental difference and can be seen in scanning tunneling microscopy measurements of the local density of states (LDOS). The last project in this thesis is a solution for a BCS-like model on a semiinfinite triangular lattice, motivated by the discovery of superconductivity in Na[sub x]CoO₂ • yH₂O. The work is a development of a new analytic and exact method of finding Andreev bound states on the edges of a superconductor. The calculation is performed for different symmetries of order the parameter (s-, p-, d- and f-wave). The results show that the existence of edge states on different edges is a sensitive probe of the order parameter symmetry.
On the width of the last scattering surface
Creators: name: Pires, N.
name: Nobre, M. A. S.
name: Lima, J. A. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the physical effects of some accelerated world models on the width of the last scattering surface (LSS) of the cosmic microwave background radiation (CMBR). The models considered in our analysis are X-matter (XCDM) and a Chaplygin type gas. The redshift of the LSS does not depend on the kind of dark energy (if XCDM of Chaplygin). Further, for a Chaplygin gas, the width of the LSS is also only weakly dependent on the kind of scenario (if we have dark energy plus cold dark matter or the unified picture).
description: 10 pages, 1 figure, 2 tables, accepted to IJMPD
Additional file 1 of Clozapine generates obsessive compulsive disorder-like behavior in mice
Creators: name: Shinwon Kang
name: Noh, Hyun Jong
name: Bae, Soo Hyeon
name: Kim, Yong-Seok
name: Hogun Lew
name: Jisoo Lim
name: Kim, Se Joo
name: Hong, Kyung Sue
name: Jong-Cheol Rah
name: Kim, Chul Hoon
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Raw data of the tested parameters in wild-type.
Ground state energy fluctuations in the Nuclear Shell Model
Creators: name: Velazquez, Victor
name: Hirsch, Jorge G.
name: Frank, Alejandro
name: Barea, Jose
name: Zuker, Andres P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Statistical fluctuations of the nuclear ground state energies are estimated using shell model calculations in which particles in the valence shells interact through well defined forces, and are coupled to an upper shell governed by random 2-body interactions. Induced ground-state energy fluctuations are found to be one order of magnitude smaller than those previously associated with chaotic components, in close agreement with independent perturbative estimates based on the spreading widths of excited states.
description: 4 pages, 4 figures, to be published in Physics Leters B
Optimal Participation of Price-maker Battery Energy Storage Systems in Energy and Ancillary Services Markets Considering Degradation Cost
Creators: name: Khalilisenobari, Reza
name: Wu, Meng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper proposes a bi-level optimization framework to investigate the optimal market operation strategies of price-maker battery energy storage systems (BESSs) in real-time energy, spinning reserve, and pay as performance regulation markets, with a special focus on understanding BESS's excessive regulation market participation observed by several system operators and the impact of battery degradation cost on BESS market activities. An accurate battery degradation cost function is integrated into the BESS's strategic bidding model. An automatic generation control (AGC) signal dispatch model is proposed to deploy AGC signals in the bi-level framework. This enables thorough studies for BESS's operating characteristics in the frequency regulation market, when both battery degradation and detailed AGC signal following activities are considered. Case studies on a synthetic system with real-world data are performed to study interactions between BESS profit maximization and wholesale market operations, considering system annual load and ancillary service requirements variations. The impacts of BESS capacity and replacement cost on its revenue from energy and ancillary services markets are also investigated.
Endowments and Investments within the Household: Evidence from Iodine Supplementation in Tanzania
Creators: name: Adhvaryu, Achyuta
name: Nyshadham, Anant
name: Adhvaryu, Achyuta
name: Nyshadham, Anant
Publisher: name: Unknown
Year: 2011
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Health Economics and Policy
subject: International Development
subject: Labor and Human Capital
subject: endowments
subject: intra-household
subject: child health
subject: Tanzania

description: Standard theories of resource allocation within the household posit that parents’ investments in their children reflect a combination of children’s endowments and parents’ preferences for child quality. We study how changes in children’s cognitive endowments affect the distribution of parental investments amongst siblings, using data from a large-scale iodine supplementation program in Tanzania. We find that parents strongly reinforce the higher cognitive endowments of children who received in utero iodine supplementation, by investing more in vaccinations and early life nutrition. The effect of siblings’ endowments on own investments depends on the extent to which quality across children is substitutable in parents’ utility functions. Neonatal investments, made before cognitive endowments become apparent to parents, are unaffected. Fertility is unaffected as well, suggesting that inframarginal quality improvements can spur investment responses even when the quantity-quality tradeoff is not readily observable.
The Evolution of Grain Policy Beyond Europe: Ottoman Grain Administration in the Late Eighteenth Century
Creators: name: Agir, Seven
name: Agir, Seven
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Institutional and Behavioral Economics
subject: Political Economy
subject: B15
subject: N33
subject: N35
subject: N43
subject: N45

description: During the second half of the eighteenth century, the Ottoman policy-makers adopted a more liberal attitude towards price formation in the Ottoman grain markets. This was accompanied by the fiscal and administrative centralization of the grain trade. These seemingly contradictory policy changes could, in part, be explained in the context of conjectural changes in grain demand and supply, which rendered pre-emptive privileges and price controls less effective. The policy change, however, was not only a practical response to the strains on the pre-existing supply network but also reflected a new concern with the state of agricultural production along with the emergence of emulation as a development strategy.
Is an Engineering Project Management Degree Worth it? Developing Agile Digital Skills for Future Practice
Creators: name: Dacre, Nicholas
name: PK Senyo
name: Reynolds, David
Publisher: name: figshare
Year: 2021
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering
subject: 120304 Digital and Interaction Design
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 150307 Innovation and Technology Management
subject: FOS: Economics and business
subject: 91503 Engineering Practice
subject: FOS: Other engineering and technologies

description: Cite this Paper:Dacre, N., Senyo, PK., & Reynolds, D. (2019). Is an Engineering Project Management Degree Worth it? Developing Agile Digital Skills for Future Practice. Engineering Education Research Network, Coventry, UK.

AbstractEngineering managers are progressively tasked with leveraging digital technologies and innovations which have yet to be fully developed, to seek out opportunities and challenges in complex project contexts. However, there is a disparity between knowledge gained from engineering development programmes, and the rapidly changing landscape of modern project practice, which requires professionals to effectively engage and deploy relevant agile digital skills in practice. For example, complex engineering projects increasingly employ dynamic digital technologies such as Artificial Intelligence (AI), Big Data, Augmented and Virtual Reality (AR / VR), 3D Printing, and Digital Twins, which require managers to quickly adapt to changing constraints through agile digital skills. Therefore, this paper seeks to focus on exploring the role of engineering project management programmes in developing knowledge and agile digital skills relevant for future project practice. Through an outline review of project management development programmes, this research paper suggests that their inherent value for engineering project managers, is largely dependent on a combination of applied research, engagement, and agile digital skills development for future practice.
IMPACTS OF EGYPTIAN SOCIO-ECONOMIC ENVIRONMENT ON DIETARY PATTERN AND ADEQUACY
Creators: name: Soliman, Ibrahim
name: Eid, Nafissa
name: Soliman, Ibrahim
name: Eid, Nafissa
Publisher: name: Unknown
Year: 1995
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: energy and protein intake
subject: energy and protein requirements
subject: Dietary Adequacy
subject: Dietary Pattern
subject: Income and Dietary Pattern
subject: vulnerable groups
subject: Income Distribution

description: Health and nutrition status including dietary adequacy are basic components of the human development and indicators for welfare in a certain community. The study focused upon how far a socio-economic environment would affect the dietary pattern and adequacy in Egypt. The current dietary pattern was compared with that before the economic reform adjustment, i.e. before 1986. Dietary adequacy of energy and protein was assessed to define the poverty line among urban and rural populations. The investigated changes in the socio-economic environment were income level, distribution, growth and price level by region; as well as demographic features of the household. Finally, the study discussed policy implications on both micro and macro level and provided recommendations to the decision-makers for how to secure adequate diet quantity-wise as well as quality-wise for poor categories and vulnerable groups among the Egyptian community.
Does regenerated emission change the high-energy signal from gamma-ray burst afterglows?
Creators: name: Ando, Shin'ichiro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study regenerated high-energy emission from the gamma-ray burst (GRB) afterglows, and compare its flux with the direct component from the same afterglow. When the intrinsic emission spectrum extends to TeV region, these very high-energy photons are significantly absorbed by the cosmic infrared background (CIB) radiation field, creating electron/positron pairs; since these pairs are highly energetic, they can scatter the cosmic microwave background radiation up to GeV energies, which may change the intrinsic afterglow light curve in the GeV region. Using the theoretical modeling given in literature and the reasonable choice of relevant parameters, we calculate the expected light curve due to the regeneration mechanism. As the result, we find that the regenerated emission could only slightly change the original light curve, even if we take a rather large value for the CIB density, independently of the density profile of surrounding medium, i.e., constant or wind-like profile. This ensures us the reliable estimation of the intrinsic GRB parameters when the high-energy observation is accessible, regardless of a large amount of uncertainty concerning the CIB density as well as extragalactic magnetic field strength.
description: 6 pages, 3 figures, accepted by MNRAS
BIG DATA TEXNOLOGIYALARINING FAN VA TA'LIMDA QO'LLANILISHI
Creators: name: Sodikova, Nigora Irgashevna
name: Muxtorova, Zilola Ziyoviddinovna
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada Big Data texnologiyalarining fan va ta"lim sohalarida, ayniqsa dasturlash fanida qo„llanilish imkoniyatlari tahlil qilinadi. Katta ma'lumotlardan foydalanish orqali ta"lim jarayonlarining samaradorligini oshirish, shaxsga moslashtirilgan o„qitish tizimlarini yaratish va ilmiy tadqiqotlarda yangi bilimlar ochilishi mumkinligi ko„rsatib beriladi. Shuningdek, maqolada Big Data texnologiyalarining O„zbekistonda raqamli ta"lim va fan taraqqiyotiga ta"siri batafsil yoritilgan. Tajriba sinovlari orqali bu texnologiyalarning dasturlash fanida amaliy qo„llanilishi tahlil qilinib, moslashtirilgan yondashuvlar taklif etilgan.
Interdisciplinary Research Methodologies in Engineering Education Research
Creators: name: Reynolds, David
name: Dacre, Nicholas
Publisher: name: figshare
Year: 2021
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering
subject: 120304 Digital and Interaction Design
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 150307 Innovation and Technology Management
subject: FOS: Economics and business
subject: 91503 Engineering Practice
subject: FOS: Other engineering and technologies

description: Cite this Paper:Reynolds, D., & Dacre, N. (2019). Interdisciplinary Research Methodologies in Engineering Education Research. Engineering Education Research Network, Coventry, UK.
AbstractAs Engineering Education Research (EER) develops as a discipline it is necessary for EER scholars to contribute to the development of learning theory rather than simply being informed by it. It has been suggested that to do this effectively will require partnerships between Engineering scholars and psychologists, education researchers, including other social scientists. The formation of such partnerships is particularly important when considering the introduction of business-related skills into engineering curriculum designed to prepare 21st Century Engineering Students for workplace challenges. In order to encourage scholars beyond Engineering to engage with EER, it is necessary to provide an introduction to the complexities of EER.

With this aim in mind, this paper provides an outline review of what is considered ‘rigorous’ research from an EER perspective as well as highlighting some of the core methodological traditions of EER. The paper aims to facilitate further discussion between EER scholars and researchers from other disciplines, ultimately leading to future collaboration on innovative and rigorous EER.
Dynamic Europa ocean shows transient Taylor columns and convection driven by ice melting and salinity
Creators: name: Ashkenazy, Yosef
name: Tziperman, Eli
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The deep (~100 km) ocean of Europa, Jupiter's moon, covered by a thick icy shell, is one of the most probable places in the solar system to find extraterrestrial life. Yet, its ocean dynamics and its interaction with the ice cover have received little attention. Previous studies suggested that Europa's ocean is turbulent using a global model and taking into account non-hydrostatic effects and the full Coriolis force. Here we add critical elements, including consistent top and bottom heating boundary conditions and the effects of icy shell melting and freezing on ocean salinity. We find weak stratification that is dominated by salinity variations. The ocean exhibits strong transient convection, eddies, and zonal jets. Transient motions organize in Taylor columns parallel to Europa's axis of rotation, are static outside of the tangent cylinder and propagate equatorward within the cylinder. The meridional oceanic heat transport is intense enough to result in a nearly uniform ice thickness, that is expected to be observable in future missions.
description: There are two animation files associated with the paper: T-surface-movie-d-all.gif, convection-movie-d-all.gif. The paper is in press in Nature Communications
AVALIAÇÃO DOS BENEFÍCIOS SOCIOECONÔMICOS DO SANEAMENTO AMBIENTAL NO MUNICÍPIO DE CUIABÁ NO PERÍODO DE 2000 A 2005
Creators: name: Mendes, Carlos Magno
name: Silva, Cristiane Marcela Oliveira
name: Mendes, Carlos Magno
name: Silva, Cristiane Marcela Oliveira
Publisher: name: Unknown
Year: 2008
Subjects: subject: Community/Rural/Urban Development
subject: Saneamento ambiental
subject: saúde pública
subject: morbidade e mortalidade
subject: custos evitáveis
subject: Environmental sanitation
subject: public health
subject: morbidity and mortality
subject: avoidable costs

description: Fatores relacionados às condições de vida da população e às questões ambientais precárias são freqüentemente citados como os maiores responsáveis pela incidência de doenças e, às vezes, por traduzirem obstáculos ao controle de surtos de epidemias. O objetivo deste estudo é avaliar os benefícios diretos e indiretos decorrentes do impacto da falta de planejamento urbano e de sua conseqüente infra-estrutura sanitária e ambiental deficitária no município de Cuiabá, no período de 2000 a 2005. Diante do saneamento ambiental falho, prejudicial à saúde humana, a análise enfoca as doenças de maior notificação e incidência, tais como diarréia, dengue e hanseníase. O Método dos Custos Evitáveis (MCE), que relaciona a poluição ambiental e sua conseqüente afetação à saúde humana, é comumente aplicado na avaliação da mortalidade e morbidade humanas. Em 2000, constatou-se que se teria evitado um gasto de aproximadamente R$ 64 milhões; sendo que, desse valor, a diarréia responderia com 83,9%; a dengue com 12,49%; e, por último, a hanseníase com 3,61%. Registrou-se que a diarréia apresenta grande representatividade frente às outras doenças, pois, durante esses seis anos, a doença demonstrou uma tendência crescente, enquanto as outras permaneceram constantes, ou foram reduzidas.---------------------------------------------Factors related to the life conditions of the population and to the precarious environmental affairs are frequently cited as the great responsible for the incidence of diseases and, sometimes, for constituting obstacles to the control of epidemic outbreaks. The aim of this study is to appraise the direct and indirect benefits that elapse from impact of lack of urban planning and its consequent deficient sanitary and environmental understructure in Cuiabá city, from 2000 to 2005. Against the deficient environmental sanitation, harmful to the human health, the analysis focuses on the diseases which had more incidence and notification, such as diarrhea, “dengue” and leprosy. The Avoidable Costs Method (ACM), that relates the environmental pollution to its consequent affectation of the human health, is commonly applied to appraise the human mortality and morbidity. In 2000, it was verified that an expense in the order of nearly R$ 64 millions would have been avoided; diarrhea would correspond to 83, 9 %; “dengue” to 12, 49%; and leprosy to 3, 61%. It was registered that diarrhea represents much more than the other diseases because, during this six years, it demonstrated a crescent tendency, while the other ones kept steady, or decreased.
Mean JHK Magnitudes of Fundamental-Mode Cepheids from Single-Epoch Observations
Creators: name: Soszynski, I.
name: Gieren, W.
name: Pietrzynski, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an empirical method for converting single-point near-infrared J, H, and K measurements of fundamental-mode Cepheids to mean magnitudes, using complete light curves in V or I bands. The algorithm is based on the template light curves in the near-infrared bandpasses. The mean uncertainty of the method is estimated to about 0.03 mag, which is smaller than the uncertainties obtained in other approaches to the problem in the literature.
description: 20 pages, 5 figures, 4 tables
Archives d'enfance (1939-1942). Explorations Journal des voyages. Brouillons
Creators: name: Http://Www.Idref.Fr/026708647 Bastaire, Jean (1927-2013)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2023

description: Numérisation ICB CollEx-Persée AAP20212022
description: Contient un essai de couverture d'un journal intitulé Le Journal des jeunes et 2 doubles pages intitulées Possessions françaises mais vides.
description: Source: Fonds Bastaire Université Clermont Auvergne (A1.0404-0406)
description: Relation: http://www.calames.abes.fr/pub/ms/Calames-202012217123817127
Shock-Cloud Interaction in the Southwestern Rim of RX J1713.7$-$3946 Evidenced by Chandra X-ray Observations
Creators: name: Tanaka, Takaaki
name: Uchida, Hiroyuki
name: Sano, Hidetoshi
name: Tsuru, Takeshi Go
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on results of Chandra X-ray observations of the southwestern part of the supernova remnant (SNR) RX J1713.7$-$3946. We measure proper motions of two X-ray bright blobs, named Blobs A and B, in regions presumably corresponding to the forward shock of the SNR. The measured velocities are $3800 \pm 100~\mathrm{km}~\mathrm{s}^{-1}$ and $2300 \pm 200~\mathrm{km}~\mathrm{s}^{-1}$ for Blobs A and B, respectively. Since a dense molecular clump is located close to Blob B, its slower velocity is attributed to shock deceleration as a result of a shock-cloud interaction. This result provides solid evidence that the forward shock of RX J1713.7$-$3946 is indeed colliding with dense gas discovered through radio observations reported in the literature. The locations and velocity differences of the two blobs lead to an estimate that the shock encountered with the dense gas $\sim 100~\mathrm{yr}$ ago. The shock velocities, together with cutoff energies of the synchrotron X-ray spectra of the blobs, indicate that particle acceleration in these regions is close to the Bohm limit. Blob B, in particular, is almost at the limit, accelerating particles at the fastest possible rate. We discuss possible influence of the shock-cloud interaction on the efficiency of particle acceleration.
description: 7 pages, 4 figures, 1 table, accepted for publication in ApJL
Additional file 1 of Clients’ perceptions of barriers and facilitators to implementing hepatitis C virus care in homeless shelters
Creators: name: Masson, Carmen L.
name: J. Konadu Fokuo
name: Anderson, August
name: Powell, Jesse
name: Zevin, Barry
name: Bush, Dylan
name: Mandana Khalili
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1.
VPNet: Variable Projection Networks
Creators: name: Kovács, Péter
name: Bognár, Gergő
name: Huber, Christian
name: Huemer, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.4; I.2.6; G.1.6
subject: 68T07, 68T05, 92C55

description: We introduce VPNet, a novel model-driven neural network architecture based on variable projection (VP). Applying VP operators to neural networks results in learnable features, interpretable parameters, and compact network structures. This paper discusses the motivation and mathematical background of VPNet and presents experiments. The VPNet approach was evaluated in the context of signal processing, where we classified a synthetic dataset and real electrocardiogram (ECG) signals. Compared to fully connected and one-dimensional convolutional networks, VPNet offers fast learning ability and good accuracy at a low computational cost of both training and inference. Based on these advantages and the promising results obtained, we anticipate a profound impact on the broader field of signal processing, in particular on classification, regression and clustering problems.
description: The codes and the experiments are available at: https://git.silicon-austria.com/pub/sparseestimation/vpnet
Background charge fluctuation in a GaAs quantum dot device
Creators: name: Jung, S. W.
name: Fujisawa, T.
name: Jeong, Y. H.
name: Hirayama, Y.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate background charge fluctuation in a GaAs quantum dot device by measuring 1/f noise in the single-electron tunneling current through the dot. The current noise is understood as fluctuations of the confinement potential and tunneling barriers. The estimated potential fluctuation increases almost linearly with temperature, which is consistent with a simple model of the 1/f noise. We find that the fluctuation increases very slightly when electrons are injected into excited states of the quantum dot.
description: to be published in Appl. Phys. Lett
DMPK Equation for Transmission Eigenvalues in Metallic Carbon Nanotubes
Creators: name: Takane, Yositake
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The Dorokhov-Mello-Pereyra-Kumar (DMPK) equation for transmission eigenvalues is derived for metallic carbon nanotubes with several conducting channels when the potential range of scatterers is larger than the lattice constant. With increasing system length L, the system approaches a fixed point, where only one channel is perfectly conducting and other channels are completely closed. The asymptotic behavior of the conductance in the long-L regime is investigated on the basis of the DMPK equation. It is shown that the length scale for the exponential decay of the typical conductance is reduced due to the presence of the perfectly conducting channel. If a magnetic field is applied, the system falls into the unitary class. It is pointed out that this transition is characterized by the disappearance of the perfectly conducting channel and the increase in decay length for the typical conductance.
description: 5 pages
ASSESSMENT METHODOLOGY OF HIGH SCHOOL STUDENTS ON THE BASIS OF DESIGN
Creators: name: Ergashev Husanboy Nu'monjanovich Uchkurgan District, Namangan Region 19th school "Informatics" teacher
Publisher: name: Zenodo
Year: 2024

description: This article describes the methodology used in design-based assessment of students and provides examples of how students can learn and implement it. The article shows the design and analysis methodology of each subject through selected examples from mathematics, English, physics, history, and biology.

A math example can help students learn algebra and graph analysis. The English example allows students to improve their speaking, analytical, and writing skills through novel analysis and attention to detail. A physics example shows how students use a methodology to select a sample from concrete, analyze it, and explain the relationships between cells and forces.

KEY WORDS: formative assessment, tests, quizzes, oral questions, diagnostic assessment, summative assessment.
PRINCIPAIS FATORES QUE INFLUENCIAM NO DESEMPENHO DA CADEIA PRODUTIVA DE LEITE – UM ESTUDO COM OS PRODUTORES DE LEITE DO MUNICÍPIO DE LARANJEIRAS DO SUL-PR
Creators: name: Viana, Giomar
name: Rinaldi, Rubia Nara
name: Viana, Giomar
name: Rinaldi, Rubia Nara
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: Agronegócio
subject: Cadeia Produtiva do Leite
subject: Desempenho
subject: Agribusiness
subject: Milk Chain
subject: Performance

description: A cadeia produtiva do leite é uma das mais relevantes no contexto do agronegócio brasileiro, uma vez que gera emprego e renda aos inúmeros agentes envolvidos no processo. Dessa maneira, o presente artigo tem por objetivo identificar os principais fatores que influenciam no desempenho da cadeia produtiva do leite, bem como a adaptação dos produtores aos novos padrões de competição e o acesso às novas tecnologias desenvolvidas. O artigo partiu de um estudo de caso junto a uma cooperativa de leite no município de Laranjeiras do Sul-PR. Inicialmente foi feito um estudo que abordou o processo de evolução da cadeia produtiva de leite no Brasil, de maneira especial, os fatores que influenciaram para a transformação da cadeia produtiva no país, mencionando os elos que compõem esta cadeia. Na seqüência foi identificada a evolução do ambiente institucional e organizacional que influenciam diretamente no desempenho da cadeia, apontando as principais mudanças tecnológicas inseridas no processo produtivo. Por fim, são identificados os principais fatores que influenciam no desenvolvimento da cadeia produtiva de leite no elo produtor rural, de maneira a analisar o nível de acesso destes produtores a tais fatores.----------------------------------------------The milk chain can be considered relevant in the Brazilian agribusiness, since it generates jobs and income for many players involved in the process. Thus, this article aims to identify the key factors that influence the performance of the milk chain, as well as the adaptation of producers to new patterns of competition and access to new technologies developed. This article is a case study with a cooperative of milk in the Laranjeiras do Sul- city of Paraná State. Initially was done a study about the evolution of milk chain in Brazil, specially, the factors that influence the transformation of this chain in the country, indicating the links of the milk chain. Following is was identified the development of institutional and organizational environment which directly affect the performance of the chain, pointing the major technological changes inserted in the production process. Finally, are identified the main factors that influence the development of the productive chain link producer of milk in the countryside, so as to examine the level of access to these producers such factors.
Radial-velocity variations due to meridional flows in the Sun and solar-type stars: impact on exoplanet detectability
Creators: name: Meunier, Nadège
name: Lagrange, Anne-Marie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Stellar variability due to magnetic activity and flows at different spatial scales strongly impacts radial velocities. This variability is seen as oscillations, granulation, supergranulation, and meridional flows. The effect of this latter process is poorly known but could affect exoplanet detectability. We aim to quantify its amplitude when integrated over the disc and its temporal variability, first for the Sun, seen with different inclinations, and then for other solar-type stars. We used long time series of solar latitudinal meridional circulation to reconstruct its integrated contribution. We then used scaling laws from HD simulations relating the amplitude of the meridional flow variability with stellar mass and rotation rate to estimate the typical amplitude expected for other solar-type stars. We find typical rms of the order of 0.5-0.7 m/s (edge-on) and 1.2-1.7 m/s (pole-on) for the Sun, with a minimal jitter for an inclination of 45-55 deg. This is significant compared to other stellar activity contributions and is much larger than the radial-velocity signal of the Earth. The variability is strongly related to the activity cycle. Extension to other solar-type stars shows that the variability due to meridional flows is dominated by the amplitude of the cycle of those stars. The meridional flow contribution sometimes represents a high fraction of the convective blueshift inhibition signal, especially for quiet, low-mass stars. Our study shows that these meridional flows could be critical for exoplanet detection. Low inclinations are more impacted than edge-on configurations, but these latter still exhibit significant variability. Meridional flows also degrade the correlation between radial velocities due to convective blueshift inhibition and chromospheric activity indicators. This will make the correction from this signal challenging for stars with no multi-cellular patterns.
description: Accepted in Astronomy and Astrophysics
DIAGNÓSTICO DA GESTÃO DA QUALIDADE NA CADEIA PRODUTIVA DO AMENDOIM: ESTUDO DE CASOS
Creators: name: Scalco, Andrea Rossi
name: Machado, Joao Guilherme De Camargo Ferraz
name: Queiroz, Timoteo Ramos
name: Scalco, Andrea Rossi
name: Machado, Joao Guilherme De Camargo Ferraz
name: Queiroz, Timoteo Ramos
Publisher: name: Unknown
Year: 2008
Subjects: subject: Crop Production/Industries
subject: qualidade de produto
subject: cadeia produtiva do amendoim
subject: gestão da qualidade.
subject: product quality
subject: peanut production chain
subject: quality management

description: Garantir ao consumidor final produtos com qualidade, em especial produtos seguros do ponto de vista de saúde humana, é uma questão de sobrevivência e de competitividade dos agentes ligados à cadeia de produção de amendoim e derivados. Sendo assim, esses agentes devem adequar as suas práticas de gestão da qualidade a fim de contribuir para a melhoria da qualidade dos produtos ofertados. Esse trabalho traz uma contribuição à medida que analisa os aspectos referentes à gestão da qualidade nos agentes da cadeia: produtor, cooperativa de armazenamento e indústria de beneficiamento, a fim de apontar os pontos fortes e fracos dessas práticas e interferir com medidas necessárias para a segurança do alimento e eficiência em termos de redução de perdas. Pode-se afirmar que os relacionamentos entre os agentes da cadeia se limitam à comercialização de grãos e negociação de preços. Não há uma preocupação em desenvolver a qualidade do amendoim enquanto produto final. Algumas medidas foram sugeridas para contornar as deficiências encontradas, como a adoção de mercanismos de incentivos, tais como pagamento diferenciado para os cooperados e investimentos na produção rural a partir de financiamentos por meio da Cooperativa, a fim de que a cadeia produtiva atue de forma integrada. A realização deste projeto de pesquisa contou com o apoio financeiro da FUNDUNESP (Fundação para o Desenvolvimento da Unesp).---------------------------------------------To guarantee to the final consumer products with quality is a question of survival and competitiveness of the agents of the peanut production chain. By this way, these agents must adjust its practices in quality management in order to contribute for the improvement of the quality of the offered product. This work brings a contribution while it analyses the referred aspects of the quality management in the agents of the chain in order to point the strong and weak points of these practices and to interfere with necessary measures the safety of the food and efficiency related to the reduction of losses. It doesn´t have developing the quality of the peanut as final product. Some measures had been suggested to correct deficiencies, as the adoption of mercanismos of incentives, such as payment differentiated for cooperated and the investments in the agricultural production from financings by means of the Cooperative, so that the productive chain acts of integrated form. This research was supported by FUNDUNESP (Foundation for the Development of the Unesp).
New insights on the AU-scale circumstellar structure of FU Orionis
Creators: name: Malbet, Fabien
name: Lachaume, Régis
name: Berger, Jean-Philippe
name: Colavita, M. Mark
name: Di Folco, Emmanuel
name: Eisner, Josh A.
name: Lane, Benjamin F.
name: Millan-Gabet, Rafaël
name: Ségransan, Damien
name: Traub, Wesley A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report new near-infrared, long-baseline interferometric observations at the AU scale of the pre-main-sequence star FU Orionis with the PTI, IOTA and VLTI interferometers. This young stellar object has been observed on 42 nights over a period of 6 years from 1998 to 2003. We have obtained 287 independent measurements of the fringe visibility with 6 different baselines ranging from 20 to 110 meters in length, in the H and K bands. Our extensive (u,v)-plane coverage, coupled with the published spectral energy distribution data, allows us to test the accretion disk scenario. We find that the most probable explanation for these observations is that FU Ori hosts an active accretion disk whose temperature law is consistent with standard models. We are able to constrain the geometry of the disk, including an inclination of 55 deg and a position angle of 47 deg. In addition, a 10 percent peak-to-peak oscillation is detected in the data (at the two-sigma level) from the longest baselines, which we interpret as a possible disk hot-spot or companion. However, the oscillation in our best data set is best explained with an unresolved spot located at a projected distance of 10 AU at the 130 deg position angle and with a magnitude difference of DeltaK = 3.9 and DeltaH = 3.6 mag moving away from the center at a rate of 1.2 AU/yr. we propose to interpret this spot as the signature of a companion of the central FU Ori system on an extremely eccentric orbit. We speculate that the close encounter of this putative companion and the central star could be the explanation of the initial photometric rise of the luminosity of this object.
Spontaneous spin-polarized current in a nonuniform Rashba interaction system
Creators: name: Sun, Qing-feng
name: Xie, X. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the electron transport through a two-dimensional semiconductor with a nonuniform Rashba spin-orbit interaction. Due to the combination of the coherence effect and the Rashba interaction, a spontaneous spin-polarized current emerges in the absence of any magnetic material and magnetic field. For a two-terminal device, only the local current contains polarization; however, with a four-terminal setup, a polarized total current is produced. This phenomenon may offer a novel way for generating a spin-polarized current, replacing the traditional spin-injection method.
description: 4 pages, 4 figures
A novel method of measuring cosmological distances using broad-line regions of quasars
Creators: name: Li, Hong
name: Zhang, Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The absolute distance scale measurements in cosmology have always been an important mission. In particular, in recent years, the Hubble constant tension between the measurements from early and late universe has become a new crisis for cosmology, which calls for new, independent absolute cosmological distance measurements. Recently, a result of measuring the parallax distance to 3C 273 through spectroastrometry and reverberation mapping was reported. We comment on this novel method in this News & Views paper.
description: 3 pages; News & Views, published online in Science Bulletin
EL EFECTO DE LA EDAD, TAMAÑO, SECTOR Y REGIÓN EN EL CRECIMIENTO DE LA INDUSTRIA AGROALIMENTARIA ESPAÑOLA
Creators: name: Albino, Pablo Murta Baiao
name: Arcelus, Francisco Javier
name: Elorz, Katrin Simon
name: Albino, Pablo Murta Baiao
name: Arcelus, Francisco Javier
name: Elorz, Katrin Simon
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Industria Agroalimentaria
subject: Crecimiento
subject: Ley de Gibrat

description: El presente trabajo tiene como objetivo identificar los efectos de las variables tamaño, edad, sector y región en el crecimiento de la industria agroalimentaria española. Para esto definimos el sistema agroalimentario y la importancia de la industria agroalimentaria. Nuestra hipótesis principal es que la industria agroalimentaria no sigue la Ley de Gibrat. Partimos del contraste de esta hipótesis para identificar los efectos de las variables de nuestro trabajo en el crecimiento de la industria agroalimentaria. Tomamos ratios de desempeño económico, rentabilidad, estructura financiera y solvencia, como variables dependientes y aplicamos regresión lineal para cada un de los ratios. Nuestros resultados muestran que la industria agroalimentaria no sigue la Ley de Gibrat, presentando relación inversa entre crecimiento y las variables de edad y tamaño. Las variables sector y región presentan relación con algunos de los ratios no sendo significativas para todas las variables dependientes. Nos queda indicado que las empresas más pequeñas y más jóvenes crecen más rápido que las de mayor tamaño y edad, pues estas buscan obtener la eficiencia de escala y así aumentar su probabilidad de sobrevivencia.
Quantum Mechanics of a Particle with Two Magnetic Impurities
Creators: name: Mashkevich, Stefan
name: Myrheim, Jan
name: Ouvry, Stéphane
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A two-dimensional quantum mechanical system consisting of a particle coupled to two magnetic impurities of different strengths, in a harmonic potential, is considered. Topological boundary conditions at impurity locations imply that the wave functions are linear combinations of two-dimensional harmonics. A number of low-lying states are computed numerically, and the qualitative features of the spectrum are analyzed.
description: 11 pages, 5 figures, LaTeX 2e
Dipole-exchange spin waves in Fibonacci magnetic multilayers
Creators: name: Pereira, J. Milton
name: Filho, R. N. Costa
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A microscopic model is employed to calculate the spectrum of spin waves in quasiperiodic magnetic multilayers in the dipole-exchange regime. Results are presented for structures in which thin ferromagnetic films are separated by non-magnetic spacers following a Fibonacci sequence and extend previous magnetostatic calculations. The results show the splitting of the frequency bands and the mode mixing caused by the dipolar interaction between the films as a function of spacer thickness, as well as the fractal aspect of the spectrum induced by the non-periodic aspect of the structure.
description: 5 pages, 5 figures
A ORGANIZAÇÃO DE PEQUENOS PRODUTORES DE LEITE DO NOROESTE DO RIO GRANDE DO SUL: APORTES NA LENTE DA NOVA ECONOMIA INSTITUCIONAL (NEI) E DA GESTÃO DE CADEIAS DE SUPRIMENTOS (GCS).
Creators: name: Arbage, Alessandro Porporatti
name: Peroni, Neimar Damian
name: Costa, Pedro Urubatan Neto Da
name: Arbage, Alessandro Porporatti
name: Peroni, Neimar Damian
name: Costa, Pedro Urubatan Neto Da
Publisher: name: Unknown
Year: 2008
Subjects: subject: Livestock Production/Industries
subject: Nova Economia Institucional
subject: Cadeia de Suprimentos
subject: Leite
subject: Agricultura Familiar
subject: New Institutional Economics
subject: Supply Chain Management
subject: Milk
subject: Familiar Agriculture

description: O artigo propõe a admissão das abordagens da Nova Economia Institucional e a Gestão de Cadeia de Suprimentos, até então não trabalhadas pelos extensionistas da “Associação Riograndense de Empreendimentos de Assistência Técnica de Extensão Rural – EMATER/RS”, na interface com organizações de pequenos produtores rurais de leite do noroeste do Estado do Rio Grande do Sul. O esboço tem como base uma discussão teórica inicial, onde se apresenta um conciso traço das teorias sistêmicas que julgamos poder contribuir para o crescimento e consolidação desses arranjos. Segue-se um breve panorama, onde as 18 cooperativas e 25 grupos de produtores estão inseridos e a descrição da organização desses agentes, com base no acompanhamento de reuniões e depoimentos dos agricultores participantes. Posteriormente, ilustra-se alguns pontos de contato entre as teorias e o caso empírico, apontando a pertinência do aprofundamento da relação entre ambas.---------------------------------------------This paper aims the admission of New Institutional Economics approaches and Supply Chain Management, until not worked by the extension students of the “Associação Riograndense de Empreendimentos de Assistência Técnica de Extensão Rural – EMATER/RS”, in the interface with organizations of little rural producers of milk from Rio Grande do Sul State. The sketch has as base an initial theory discussion, where it shows a concise line of the systemic theories, we judge they can contribute for increasing and consolidating these settings. It follows a brief panorama, where 18 co-operative and 25 groups of producers are inserted and the organization description of these agents, based in accompaniment of meeting and depositions from the participant farmers. After, it illustrates some contact point between the theory and the empiric case, showing the importance of deepening about the relation between both.