cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The relation between channel instability and sediment transport on Lower Fraser River
Creators: name: McLean, David George
Publisher: name: University of British Columbia
Year: 2011

description: This study investigates the relation between channel instability and sediment transport along an 80 km reach of lower Fraser River, British Columbia. The major processes governing instability, bank erosion and sedimentation were investigated by analyzing the patterns of morphologic change along the river over the last century. Morphologic changes were documented using historical maps and air photographs. The method of approach can be considered a "macroscopic" one since the investigation focused primarily on the gross patterns of change that occurred over periods of years to decades. It was found that this interval is the most appropriate time scale for investigating channel instability and sedimentation processes on a large stream such as the Fraser River. This is because the major features governing instability and sedimentation also develop over comparatively long time periods. Several examples are presented to illustrate how sequences of major channel instability have propagated along the river over periods of 10 to 30 years. These disturbances often initiated new patterns of sedimentation, local erosion and subsequent channel instability further downstream. The most common diagnostic feature associated with these travelling disturbances are relatively large, low amplitude, linguoidal-shaped "gravel sheets" that attach to more stable lateral bars and islands. These bars may cause strong flow impingement against previously stable banks and islands. As a result, rapid scour and erosion may be initiated even during periods of low discharge. Four different approaches were used to estimate the long term gravel transport rate along the river. These methods included direct measurements using trap samplers (carried out by Water Survey of Canada over a period of 12 years), a sediment budget calculation which related changes in transport through a reach to changes in the volume of sediment stored in the channel determined by surveys, a morphologic approach which used a simple model of sediment transfers through a reach, and finally theoretical bed load formulae. It was found that the sediment budget and the morphological model provided the most reliable and most generally applicable results. This was because the methods rely on observations of sediment movement over periods of years or decades. It was found that on Fraser River, the time scales of the major processes governing gravel bed load transport were also measured in years or decades. As a result, short term measurements such as from bed load trap samplers show only a poor correlation between transport rate and flow variables. Therefore, to estimate long term transport rates with these data, a very large number of observations is required to integrate the transport rates over time.
มาตรการทางกฎหมายในการส่งเสริมการพัฒนาพลังงานที่สะอาด
Creators: name: อุดมศักดิ์ สินธิพงษ์
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: พลังงานสะอาด, การพัฒนาที่ยั่งยืน, พลังงานหมุนเวียน, กฎหมายเชิงนโยบาย

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร
Understanding performance variability in standard and pipelined parallel Krylov solvers
Creators: name: Morgan, Hannah
name: Sanan, Patrick
name: Knepley, Matthew G.
name: Mills, Richard Tran
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Software (cs.MS)
subject: FOS: Computer and information sciences

description: In this work, we collect data from runs of Krylov subspace methods and pipelined Krylov algorithms in an effort to understand and model the impact of machine noise and other sources of variability on performance. We find large variability of Krylov iterations between compute nodes for standard methods that is reduced in pipelined algorithms, directly supporting conjecture, as well as large variation between statistical distributions of runtimes across iterations. Based on these results, we improve upon a previously introduced nondeterministic performance model by allowing iterations to fluctuate over time. We present our data from runs of various Krylov algorithms across multiple platforms as well as our updated non-stationary model that provides good agreement with observations. We also suggest how it can be used as a predictive tool.
description: 18 pages, 12 figures
Spin transverse force and quantum transverse transport
Creators: name: Zhou, Bin
name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a brief review on spin transverse force, which exerts on the spin as the electron is moving in an electric field. This force, analogue to the Lorentz force on electron charge, is perpendicular to the electric field and spin current carried by the electron. The force stems from the spin-orbit coupling of electrons as a relativistic quantum effect, and could be used to understand the Zitterbewegung of electron wave packet and the quantum transverse transport of electron in a heuristic way.
description: 4 pages, manuscript of invited talk on IAS Workshop on Spintronics at Nanyang Techological University, Singapore, 2006
Positive and negative design in stability and thermal adaptation of natural proteins
Creators: name: Berezovsky, Igor N.
name: Zeldovich, Konstantin B.
name: Shakhnovich, Eugene I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The aim of this work is to elucidate how physical principles of protein design are reflected in natural sequences that evolved in response to the thermal conditions of the environment. Using an exactly solvable lattice model, we design sequences with selected thermal properties. Compositional analysis of designed model sequences and natural proteomes reveals a specific trend in amino acid compositions in response to the requirement of stability at elevated environmental temperature, i.e. the increase of fractions of hydrophobic and charged amino acid residues at the expense of polar ones. We show that this from both ends of hydrophobicity scale trend is due to positive (to stabilize the native state) and negative (to destabilize misfolded states) components of protein design. Negative design strengthens specific repulsive nonnative interactions that appear in misfolded structures. A pressure to preserve specific repulsive interactions in non-native conformations may result in correlated mutations between amino acids which are far apart in the native state but may be in contact in misfolded conformations. Such correlated mutations are indeed found in TIM barrel and other proteins.
description: PLoS Computational Biology, in press
Open Peer Review, Collaborative Preprint Review and Opportunities to Learn and Teach Others
Creators: name: Fairhurst, Vanessa
name: Sansing, Chad
name: Dine, Roseline Dzekem
name: Elkheir, Lamis Yahia Mohamed
name: Ezeike, Ebuka
Publisher: name: My University
Year: 2024
Subjects: #openaccess
#research
#openscience
#peerreview
#preprint
#AfricArXiv
#Webinar

description: This webinar focused on the benefits of open peer review and how researchers can work together to review preprints. Vanessa Fairhurst and Chad Sansing from PREreview also shared opportunities for learning and teaching within the research community. Some members of the 2024 PREreview Champions Program also be joined to share their experiences of working with PREreview in the African research context. This was a great opportunity to understand more about collaborative review processes and their positive impact on science.
description: Open Peer Review, Collaborative Preprint Review and Opportunities to Learn and Teach Others - AfricArXiv Open Science Webinar Series 2024
Learning to Robustly Negotiate Bi-Directional Lane Usage in High-Conflict Driving Scenarios
Creators: name: Killing, Christoph
name: Villaflor, Adam
name: Dolan, John M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Recently, autonomous driving has made substantial progress in addressing the most common traffic scenarios like intersection navigation and lane changing. However, most of these successes have been limited to scenarios with well-defined traffic rules and require minimal negotiation with other vehicles. In this paper, we introduce a previously unconsidered, yet everyday, high-conflict driving scenario requiring negotiations between agents of equal rights and priorities. There exists no centralized control structure and we do not allow communications. Therefore, it is unknown if other drivers are willing to cooperate, and if so to what extent. We train policies to robustly negotiate with opposing vehicles of an unobservable degree of cooperativeness using multi-agent reinforcement learning (MARL). We propose Discrete Asymmetric Soft Actor-Critic (DASAC), a maximum-entropy off-policy MARL algorithm allowing for centralized training with decentralized execution. We show that using DASAC we are able to successfully negotiate and traverse the scenario considered over 99% of the time. Our agents are robust to an unknown timing of opponent decisions, an unobservable degree of cooperativeness of the opposing vehicle, and previously unencountered policies. Furthermore, they learn to exhibit human-like behaviors such as defensive driving, anticipating solution options and interpreting the behavior of other agents.
description: 7 pages, 7 figures
title: EFFECTS OF SEX EDUCATION AMONG PRIVATE SECONDARY SCHOOL GIRLS IN ILEKUN COMMUNITY, AKURE SOUTH LOCAL GOVERNMENT AREA, ONDO STATE, NIGERIA
title: N/A
titleType: AlternativeTitle
Creators: name: Ilegbusi, Paul
name: TOMORI, MICHAEL
Publisher: name: My University
Year: 2024
Subjects: Education
Effects
Sex education
Sexuality

description: This is an international scientific conference research paper presentation on the effects of sex education among private secondary school girls.
description: Sexuality education is a central aspect of being human throughout life and encompasses sex, gender identities and roles, sexual orientation, eroticism, pleasure, intimacy and reproduction. This study was aimed at investigating the effects of sex education among private secondary school girls in Ilekun, Akure South Local Government Area, Ondo State, Nigeria. The study design was descriptive, using simple random technique and 120 structured questionnaires were administered and retrieved for analysis, using SPSS frequency table and simple percentage. The study revealed that 97.5% of the students have heard about sex education, comprising 39% (from home), 28% (from school), 11.6% (from religious houses), 5.8% (from internet), 4% (from friends), 3% (from radio/television), 2.5% (from social media), and 2.5% (from sexual books/magazines). Those introduced to sex education between 10 and 14 years old were 65.8%; 51.6% agreed that sex education is not taught in secondary schools because of the following reasons: shy to talk about it (82.5%), not included in school curriculum (82.5%), no trained sex education counselor (72.5%), and no enough time for it in school (76.6%). Effects of sex education include: reduction of unwanted pregnancy (90.8%), reduced sexually transmitted infections (93%), changes one’s sexual attitude (91.6%), being responsible (87.5%), promotes abstinence (79%), and lacks of it leads to rape (94%). The study concludes that sex education should be integrated into the secondary school curriculum with well trained counselors. Additionally, it emphasizes the role of parents, religious institutions, communities and government in promoting sexuality education.
Complementary Experiments of the Thick Line Segment Detection Algorithm: Evaluation of ADS and ATC Concepts
Creators: name: Even, Philippe
name: Ngo, Phuc
name: Kerautret, Bertrand
Publisher: name: Zenodo
Year: 2019
Subjects: Line detection

description: This document presents complementary experiments on the published algorithm of Thick Line Segment Detection with Fast Directional Tracking. The main paper is actually published at ICIAP 2019. First tests compare the performance of the detector with and without adaptive directional scans (ADS) and assigned thickness control (ATC). On the detector without ADS, the fine tracking step must be performed twice to get less risk of growing blurred segment escape from the scan strip.
A INTERDISCIPLINARIDADE COMO FERRAMENTA DE SUCESSO NO ENSINO DE MATEMÁTICA E EDUCAÇÃO FÍSICA NO PROEJA
Creators: name: Avaetê de Lunetta e Rodrigues Guerra
name: Jefferson Florencio Rozendo
Publisher: name: Zenodo
Year: 2023

description: O presente artigo aborda a interdisciplinaridade, que é uma poderosa ferramenta no ensino de matemática e educação física no Programa Nacional de Integração da Educação Profissional com a Educação Básica na Modalidade de Educação de Jovens e Adultos (PROEJA). No caso do ensino de matemática e educação física no PROEJA, essa perspectiva permite que os estudantes explorem conceitos matemáticos e suas aplicações no contexto da educação física, além de desenvolver competências e habilidades relacionadas às duas disciplinas. A metodologia utilizada na presente pesquisa, será a pesquisa bibliográfica, utilizando como base, materiais acadêmicos e científicos, publicados anteriormente, que servirão de apoio à pesquisa em curso. Conclui-se que a interdisciplinaridade também contribui para a formação de cidadãos críticos e reflexivos, capazes de compreender a importância da Matemática e da Educação Física em diferentes contextos e situações. Portanto, investir na interdisciplinaridade é investir no sucesso do ensino no PROEJA, preparando os estudantes para os desafios do mundo contemporâneo.
The SIBELIUS Project: E Pluribus Unum
Creators: name: Sawala, Till
name: McAlpine, Stuart
name: Jasche, Jens
name: Lavaux, Guilhem
name: Jenkins, Adrian
name: Johansson, Peter H.
name: Frenk, Carlos S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We introduce "Simulations Beyond The Local Universe" (SIBELIUS) that connect the Local Group to its cosmic environment. We show that introducing hierarchical small-scale perturbations to a density field constrained on large scales by observations provides an efficient way to explore the sample space of Local Group analogues. From more than 60 000 simulations, we identify a hierarchy of Local Group characteristics emanating from different scales: the total mass, orientation, orbital energy and the angular momentum are largely determined by modes above $λ$ = 1.6 comoving Mpc (cMpc) in the primordial density field. Smaller scale variations are mostly manifest as perturbations to the MW-M31 orbit, and we find that the observables commonly used to describe the Local Group -- the MW-M31 separation and radial velocity -- are transient and depend on specifying scales down to 0.2 cMpc in the primordial density field. We further find that the presence of M33/LMC analogues significantly affects the MW-M31 orbit and its sensitivity to small-scale perturbations. We construct initial conditions that lead to the formation of a Local Group whose primary observables precisely match the current observations.
description: 14 pages, 15 figures. Submitted to MNRAS, comments welcome!
On the Dirac and Pauli operators with several Aharonov-Bohm solenoids
Creators: name: Persson, Mikael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 35P15, 35Q40, 81Q10

description: We study the self-adjoint Pauli operators that can be realized as the square of a self-adjoint Dirac operator and correspond to a magnetic field consisting of a finite number of Aharonov-Bohm solenoids and a regular part, and prove an Aharonov-Casher type formula for the number of zero-modes for these operators. We also see that essentially only one of the Pauli operators are spin-flip invariant, and this operator does not have any zero-modes.
Confinement of fractional quantum Hall states in narrow conducting channels
Creators: name: Willett, R. L.
name: Manfra, M. J.
name: Pfeiffer, L. N.
name: West, K. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Confinement of small-gapped fractional quantum Hall states facilitates quasiparticle manipulation and is an important step towards quasiparticle interference measurements. Demonstrated here is conduction through top gate defined, narrow channels in high density, ultra-high mobility heterostructures. Transport evidence for the persistence of a correlated state at filling fraction 5/3 is shown in channels of 2micron length but gated to near 0.3micron in width. The methods employed to achieve this confinement hold promise for interference devices proposed for studying potential non-Abelian statistics at filling fraction 5/2.
Formation of 24Mg* in the Splitting of 28Si Nuclei by 1-GeV Protons
Creators: name: Vasenko, A. A.
name: Galanina, N. D.
name: Gusev, K. E.
name: Demidov, V. S.
name: Demidova, E. V.
name: Kirpichnikov, I. V.
name: Sokolov, A. Yu.
name: Starostin, A. S.
name: Khaldeeva, N. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The 28Si(p, p' gamma)24Mg reaction has been studied at the ITEP accelerator by the hadron-gamma coincidence method for a proton energy of 1 GeV. Two reaction products are detected: a 1368.6-keV gamma-ray photon accompanying the transition of the 24Mg* nucleus from the first excited state to the ground state and a proton p' whose momentum is measured in a magnetic spectrometer. The measured distribution in the energy lost by the proton in interaction is attributed to five processes: the direct knockout of a nuclear alpha cluster, the knockout of four nucleons with a total charge number of 2, the formation of the DeltaSi isobaric nucleus, the formation of the Delta isobar in the interaction of the incident proton with a nuclear nucleon, and the production of a pi meson, which is at rest in the nuclear reference frame. The last process likely corresponds to the reaction of the formation of a deeply bound pion state in the 28P nucleus. Such states were previously observed only on heavy nuclei. The cross sections for the listed processes have been estimated.
description: 14 pages, 3 figures submitted to JETP Letters
Quantum Markovian activated surface diffusion of interacting adsorbates
Creators: name: Martinez-Casado, R.
name: Sanz, A. S.
name: Miret-Artes, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum Markovian activated atom-surface diffusion model with interacting adsorbates is proposed for the intermediate scattering function, which is shown to be complex-valued and factorizable into a classical-like and a quantum-mechanical factor. Applications to the diffusion of Na atoms on flat (weakly corrugated) and corrugated-Cu(001) surfaces at different coverages and surface temperatures are analyzed. Quantum effects are relevant to diffusion at low surface temperatures and coverages even for relatively heavy particles, such as Na atoms, where transport by tunneling is absent.
description: 6 pages, 4 figures
FACTORS RESPONSIBLE FOR EARLY PREGNANCY AMONG FEMALE TEENAGERS IN ESURE, AKURE SOUTH LOCAL GOVERNMENT AREA, ONDO STATE
Creators: name: Ilegbusi, Paul
name: Adenuga, Dr. Kayode Ibrahim
Publisher: name: My University
Year: 2024
Subjects: Early pregnancy
Female teenagers
Pregnancy
Sex education
Teenage pregnancy.

description: This is an international scientific conference research paper presentation on the factors responsible for teenage pregnancies in the community.
description: Teenage pregnancy has recently gained popularity due to its numerous negative effects on the overall health of the adolescent nursing mother, the child, the family, and the entire community. The study investigated factors responsible for early pregnancy among female teenagers in Esure, Akure South Local Government, Ondo State, Nigeria. The study employed a descriptive design, administering 108 questionnaires for analysis using IBM SPSS Version 25. The findings revealed that 92.6% of the respondents are knowledgeable about teenage pregnancy; 86% have given birth; age at first sexual intercourse was highest between 17 19 years (44%); Primary causes of teenage pregnancy include a lack of sex education (70%), followed by peer pressure (35%), poverty (20%), and low self-esteem (19%). Other associated factors include a lack of self-control (28%), a lack of parenting (24%), and poverty (23%). The vulnerable groups include orphans (82.4%), children from single parents (74%), sexually active teenagers (92.6%), and gifts from the opposite sex (83.3%). The implications of teenage pregnancy include sexually transmitted infections (40%), abortion (23%), bleeding after birth (15%), death (14%), and infertility (8%). Other factors include school dropout (35.2%) and stigmatisation (34.3%). Prevention of teenage pregnancy includes health education (33.3%), abstinence (22.2%), use of contraceptives (18.5%), prevention of early marriage (9.3%), sex education (8.3%). The study recommends the introduction of youth-friendly health services, continuous health education, and the incorporation of human sexuality education into school curricula. The study also advocates for government support in establishing youth counselling centres and providing resources for pregnant and parenting teenagers.
ULTRACAM observations of SDSS J170213.26+322954.1 - an eclipsing cataclysmic variable in the period gap
Creators: name: Littlefair, S. P.
name: Dhillon, V. S.
name: Marsh, T. R.
name: Gaensicke, B. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high-speed, three-colour photometry of the eclipsing cataclysmic variable SDSS J170213.26+322954.1 (hereafter SDSS J1702+3229). This system has an orbital period of 2.4 hours, placing it within the ``period gap'' for cataclysmic variables. We determine the system parameters via a parameterized model of the eclipse fitted to the observed light curve by chi-squared minimization. We obtain a mass ratio of q = 0.215 +/- 0.015 and an orbital inclination i = 82.4 +- 0.4 degrees. The primary mass is M_w = 0.94 +/- 0.01 Msun. The secondary mass and radius are found to be Mr = 0.20 +/- 0.01 Msun and Rr = 0.243 +/- 0.013 Rsun respectively. We find a distance to the system of 440 +/- 30 pc, and an effective temperature for the secondary star of 3800 +/- 100 K (corresponding to a spectral type of M0 +/- 0.5V). Both the distance and effective temperature are consistent with previous values derived via spectroscopy of the red star. The secondary star is significantly less massive than expected for the orbital period, and significantly warmer than expected for its mass. This can be explained if the secondary star is significantly evolved: the mass and effective temperature are consistent with a secondary star that began mass transfer with a greatly reduced central hydrogen fraction. The nature of the secondary star in SDSS J1702+3229 supports predictions that CVs with evolved secondary stars might be found accreting within the period gap.
description: To be puclished in MNRAS. 7 pages, 2 figures and 4 tables. Accepted 2006 July 4
Dynamical phases in a "multifractal" Rosenzweig-Porter model
Creators: name: Khaymovich, I. M.
name: Kravtsov, V. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the static and dynamic phases in a Rosenzweig-Porter (RP) random matrix ensemble with the tailed distribution of off-diagonal matrix elements of the form of the large-deviation ansatz. We present a general theory of survival probability in such a random-matrix model and show that the {\it averaged} survival probability may decay with time as the simple exponent, as the stretch-exponent and as a power-law or slower. Correspondingly, we identify the exponential, the stretch-exponential and the frozen-dynamics phases. As an example, we consider the mapping of the Anderson model on Random Regular Graph (RRG) onto the "multifractal" RP model and find exact values of the stretch-exponent $κ$ depending on box-distributed disorder in the thermodynamic limit. As another example we consider the logarithmically-normal RP (LN-RP) random matrix ensemble and find analytically its phase diagram and the exponent $κ$. In addition, our theory allows to compute the shift of apparent phase transition lines at a finite system size and show that in the case of RP associated with RRG and LN-RP with the same symmetry of distribution function of hopping, a finite-size multifractal "phase" emerges near the tricritical point which is also the point of localization transition.
description: 31 pages, 8 figures, 73 references + 10 pages, 5 figures in Appendices and references; Conclusions and Appendix C added, File style changed
Understanding the Impacts of China’s Belt and Road Initiative (BRI) over the Program for Infrastructure Development in Africa (PIDA) (2013-2023)
Creators: name: Raza, Muhammad Amjad
name: Dr. Abdul Basit Khan
Publisher: name: Pakistan Social Sciences Review
Year: 2024
Subjects: Belt and Road Initiative (BRI)
Program for Infrastructure Development in Africa (PIDA)
China-African Union Relations

description: To fulfil her ever-growing commercial and economic needs, the 21st century China is undertaking multiple assignments and involved in several mega developmental projects across the globe nevertheless the South Asia, Central Asia and African Union (AU) have been enjoying primary importance in this regard and have attracted billions of dollars during the term of current Chinese President Xi Jinping. Keeping the preceding fact in view, the instant study focuses on the engagements of China with the member states of AU to understand the nature and scope of various projects being undertaken to increase the regional and intercontinental connectivity aligned with Belt & Road Initiative (BRI) and the Program for Infrastructure Development in Africa (PIDA) during 2013-2023 across five African geographical regions. By qualitatively evaluating relevant academic literature, project reports, and financial documents, it finds that China and the AU are mutually engaged in infrastructure development, establishing trade routes along with economic zones to promote industrialization and ensure economic growth. It establishes that substantial Chinese investment in the length and breadth of AU has contributed to regional integration and social prosperity whereas China, in return, has secured a deep-rooted as well as long-lasting penetration into the region which, for centuries, had commonly been dubbed as the dark continent.
$A_{FB}$ in the SMEFT: precision Z physics at the LHC
Creators: name: Bresó-Pla, Víctor
name: Falkowski, Adam
name: González-Alonso, Martín
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the forward-backward asymmetry $A_{FB}$ in $pp \to \ell^+\ell^-$ at the Z peak within the Standard Model Effective Field Theory (SMEFT). We find that this observable provides per mille level constraints on the vertex corrections of the Z boson to quarks,which close a flat direction in the electroweak precision SMEFT fit. Moreover, we show that current $A_{FB}$ data is precise enough so that its inclusion in the fit improves significantly LEP bounds even in simple New Physics setups. This demonstrates that the LHC can compete with and complement LEP when it comes to precision measurements of the Z boson properties
description: 24 pages, 5 figures
Exploiting multi-temporal information for improved speckle reduction of Sentinel-1 SAR images by deep learning
Creators: name: Dalsasso, Emanuele
name: Meraoumia, Inès
name: Denis, Loïc
name: Tupin, Florence
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Deep learning approaches show unprecedented results for speckle reduction in SAR amplitude images. The wide availability of multi-temporal stacks of SAR images can improve even further the quality of denoising. In this paper, we propose a flexible yet efficient way to integrate temporal information into a deep neural network for speckle suppression. Archives provide access to long time-series of SAR images, from which multi-temporal averages can be computed with virtually no remaining speckle fluctuations. The proposed method combines this multi-temporal average and the image at a given date in the form of a ratio image and uses a state-of-the-art neural network to remove the speckle in this ratio image. This simple strategy is shown to offer a noticeable improvement compared to filtering the original image without knowledge of the multi-temporal average.
The economics of seemingly abundant resource : efficient water pricing in Vancouver, Canada
Creators: name: Renzetti, Steven
Publisher: name: University of British Columbia
Year: 2011

description: Current North American water pricing practices are inefficient because they are based on average utility expenditures rather than marginal costs and because they typically neglect factors such as the cyclicity of demands, the time of consumption and the value of the water resource. Despite strong criticisms of these practices (Hirshleifer, DeHaven and Milliman, 1960; Pearse, 1985) and the presence of well articulated theoretical models of efficient pricing alternatives (eg., peak-load pricing) no empirical study has been done to document the magnitude of the efficiency gains from altering water prices. A simulation program computes the impact upon a representative water utility's output and deficit and upon aggregate consumer surplus of a move from current practice to efficient prices. The program is based on the estimated costs of supply and demand for water for the city of Vancouver, Canada. A time series of quarterly observations for the period 1975-1986 is used to estimate short and long run marginal costs. The estimated cost structure of the utility is also used to test for optimal employment of its fixed factors: water in storage and capital. Cross-sectional data sets are used to estimate market demands for residential and industrial users. The estimation results indicate that long run marginal cost exceeds short run costs by a large margin and that there is some evidence of over-capitalization by the utility. Water demands are seen to be inelastic for indoor and outdoor residential consumption but are elastic for industrial consumption. Simulation results show that a move to seasonally differentiated pricing (with an annual charge calculated to recoup the resulting deficit) raises aggregate surplus by approximately 4%. Conversely, a move from current practice to Ramsey prices leads to a decrease in aggregate consumer surplus of approximately 13%.
$W^+W^-$ production at NNLO+PS with MiNNLO$_{\rm PS}$
Creators: name: Lombardi, Daniele
name: Wiesemann, Marius
name: Zanderighi, Giulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider $W^+W^-$ production in hadronic collisions and present the computation of next-to-next-to-leading order accurate predictions consistently matched to parton showers (NNLO+PS) using the MiNNLO$_{\rm PS}$ method. Spin correlations, interferences and off-shell effects are included by calculating the full process $pp \to e^+ν_e μ^-\barν_μ$. This is the first NNLO+PS calculation for $W^+W^-$ production that does not require an a-posteriori multi-differential reweighting. The evaluation time of the two-loop contribution has been reduced by more than one order of magnitude through a four-dimensional cubic spline interpolation. We find good agreement with the inclusive and fiducial cross sections measured by ATLAS and CMS. Both NNLO corrections and matching to parton showers are important for an accurate simulation of the $W^+W^-$ signal, and their matching provides the best description of fully exclusive $W^+W^-$ events to date.
description: 45 pages, 12 figures, 2 tables
WEAK CONVERGENCE OF STOCHASTIC INTEGRALS OVER POINT PROCESSES IN SPACE D
Creators: name: Mamatov, Khusniddin
Publisher: name: Zenodo
Year: 2025

description: In this paper, we investigate the weak convergence of stochastic integrals to point processes. For clarity, we refer to several accepted assertions from the general theory of random processes, which are detailed in literature sources; therefore, we present formulations without proofs. Here, we utilize concepts from contemporary martingale theory in continuous time, including stochastic calculus in point processes.
A note on the interpretation of the statistical analysis of the $M_{\bullet}-M_{G}σ^2$ scaling relation
Creators: name: Iannella, A. L.
name: Greco, L.
name: Feoli, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the context of scaling relations between Supermassive Black Holes and host-galaxy properties, we aim to enhance the comparison between $M_{\bullet} - M_{G}σ^2$ and $M_{\bullet} - σ$ relations from a statistical point of view. First, it is suggested to take into account the predictive accuracy of the scaling relation, in addition to the classical measures of goodness of fit. Here, prediction accuracy is fairly evaluated according to a leave-one-out cross-validation strategy. Then, we spread more light on the analysis of residuals from the fitted scaling relation, in order to provide more useful information on the role played by the different variables in their correlation with the black hole mass. The findings from six samples are discussed.
description: Accepted for publication in Astrophysics and Space Science
The origin of steep vertical stellar distribution in the Galactic disk
Creators: name: Banerjee, Arunima
name: Jog, Chanda J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Over the past two decades observations have revealed that the vertical density distribution of stars in galaxies near the mid-plane is substantially steeper than the sech^2 function that is expected from an isothermal approximation. However, the physical origin for this has not been explained so far. Here we show that such steep profiles result naturally even within the isothermal regime, on taking into account the gravitational force due to the gas. Due to its low velocity dispersion the gas is concentrated closer to the galactic mid-plane than the stars, and hence it strongly affects the vertical stellar distribution even though its contribution to the total surface density is small. We apply a three-component galactic disk model consisting of gravitationally coupled stars and the HI and H_2 gas, embedded in the dark matter halo, and calculate the vertical density distribution of stars for the Galaxy. The resulting vertical density distribution of stars is shown to be steeper than the sech^2 function, and lies between the sech and an exponential function, in good agreement with observations of galaxies. We also show that a multi-component stellar disk consisting of coupled dwarfs and two populations of giants does not explain the observed steep stellar profiles.
description: 21 pages, 7 figures, accepted for publication in ApJ
BIRDS (CLASS AVES: LINNAEUS, 1758) OF INDUS RIVER DELTA, SINDH, PAKISTAN
Creators: name: DHANI BUX MASHORI
name: KALSOOM SHAIKH
name: ABDUL REHMAN SHAIKH
name: ALI RAZA SOOMRO
name: GHULAM MURTAZA MOROOJO
name: SHAKEELA ABRO
name: SABA SOOMRO
Publisher: name: Zenodo
Year: 2023
Subjects: Avifauna, Diversity, Conservation, Wetland, Sindh.

description: Abstract

Birds have diverse forms, fascinating appearance and peculiar distribution and they are beauty of wetlands along with ecologically and economically beneficial. Indus river delta is an important wetland and prominent abode to variety of avifaunal species that are unknown to the world. For discovering avifaunal diversity and their status, we explored the world’s 5th largest delta that lies in Sindh province of Pakistan. Altogether 15avifaunal species are recorded belonging to genera: Phalacrocorax (Brisson, 1760), Himantopus (Linnaeus, 1758), Galerida (F. Boie, 1828),Larus (Linnaeus, 1758), Phoenicopterus (T. Forster, 1817), Sternula (F. Boie, 1822), Pluvialis (Brisson, 1760), Mycteria (Linnaeus, 1758), Vanellus (Brisson, 1760), Accipiter (Brisson, 1760), Calidris (Merrem, 1804), Limosa ((Brisson, 1760) under families: Accipitridae, Alaudidae, Ardeidae, Charadriidae, Ciconiidae, Laridae, Phalacrocoracidae, Phoenicopteridae, Recurvirostridaea and Scolopacidae. These species are reported for the first time from Indus River Delta. The conservation status of majority of species is of Least Concern (LC), but few species are declared as Near Threatened (NT) by the International Union for the Conservation of Nature (IUCN).
คอนสตรัคติวิซึม: วิถีปฏิบัติการสร้างความรู้ในสังคมแห่งการเรียนรู้
Creators: name: อลันด์ คงไทย
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: การสร้างความรู้ตามตามทฤษฎีคอนสตรัคติวิซึม, พระราชบัญญัติการศึกษาแห่งชาติ, สังคมแห่งการเรียนรู้

description: ฉบับพิเศษ, วารสารมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยมหาสารคาม
Finite difference schemes for second order systems describing black holes
Creators: name: Motamed, Mohammad
name: Babiuc, M.
name: Szilagyi, B.
name: Kreiss, H-O.
name: Winicour, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the harmonic description of general relativity, the principle part of Einstein's equations reduces to 10 curved space wave equations for the componenets of the space-time metric. We present theorems regarding the stability of several evolution-boundary algorithms for such equations when treated in second order differential form. The theorems apply to a model black hole space-time consisting of a spacelike inner boundary excising the singularity, a timelike outer boundary and a horizon in between. These algorithms are implemented as stable, convergent numerical codes and their performance is compared in a 2-dimensional excision problem.
description: 19 pages, 9 figures
A Glimpse of China-African Union Economic Relations during 21st Century
Creators: name: Raza, Muhammad Amjad
name: Dr. Abdul Basit Khan
Publisher: name: Journal of Development and Social Sciences
Year: 2024
Subjects: Agenda 2063
Belt and Road Initiative
China-African Union Economic Relations
FOCAC
NEPAD

description: The ever-prospering China-African Union (AU) economic relations are the outcome of their long-term interaction. The dawn of 21st century marked a significant boost in this relationship with the establishment of the Forum on China-Africa Cooperation (FOCAC) and the New Partnership for Africa’s Development (NEPAD). Chinese Presidents Hu Jin Tao (2003-2013) and President Xi Jinping (2013- ) preferred to follow a multilateral approach towards African continent and interacted with AU through inter-regional organizations which policy radically transformed the level of Chinese penetration into the continent. The Agenda 2063 of AU has also been designed to maximize the benefits from China’s Belt & Road Initiative (BRI) of 2013. As a consequence of integrated efforts from China and the AU for the economic development of the continent, the collective economy of Africa had reached at a magnificent amount of $3 trillion in 2023. In this scenario, the current study, while reviewing policy documents and available literature, explores the nature of China's enhanced cooperation with Africa through regional and multilateral organizations such as the AU, FOCAC and NEPAD. It elucidates how China and AU had committed and cooperated in pursuit of the mantra 'build an even stronger community with a shared future'. Applying an explanatory and descriptive approach, the study concludes that China's extensive engagement with the AU to promote infrastructure development and connectivity has profoundly impacted African economic growth. Finally, it goes without saying that the analytics, assessments and outcomes of the study would help future researchers, academia and experts working on China’s economic engagements with the AU to rationally understand the impact of these relations.
Gravity as an ensemble and the moment problem
Creators: name: Janssen, Oliver
name: Mirbabayi, Mehrdad
name: Zograf, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: If a bulk gravitational path integral can be identified with an average of partition functions over an ensemble of boundary quantum theories, then a corresponding moment problem can be solved. We review existence and uniqueness criteria for the Stieltjes moment problem, which include an infinite set of positivity conditions. The existence criteria are useful to rule out an ensemble interpretation of a theory of gravity, or to indicate incompleteness of the gravitational data. We illustrate this in a particular class of 2D gravities including variants of the CGHS model and JT supergravity. The uniqueness criterium is relevant for an unambiguous determination of quantities such as $\overline{\log Z(β)}$ or the quenched free energy. We prove in JT gravity that perturbation theory, both in the coupling which suppresses higher-genus surfaces and in the temperature, fails when the number of boundaries is taken to infinity. Since this asymptotic data is necessary for the uniqueness problem, the question cannot be settled without a nonperturbative completion of the theory.
description: 11+12 pages
Dynamically Induced Exceptional Phases in Quenched Interacting Semimetals
Creators: name: Lehmann, Carl
name: Schüler, Michael
name: Budich, Jan Carl
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the dynamical formation of exceptional degeneracies in basic correlation functions of non-integrable one- and two-dimensional systems quenched to the vicinity of a critical point. Remarkably, fine-tuned semi-metallic points in the phase diagram of the considered systems are thereby promoted to topologically robust non-Hermitian (NH) nodal phases emerging in the coherent long-time evolution of a dynamically equilibrating system. In the framework of non-equilibrium Green's function methods within the conserving second Born approximation, we predict observable signatures of these novel NH nodal phases in simple spectral functions as well as in the time-evolution of momentum distribution functions.
Creation operators and algebraic Bethe ansatz for the elliptic quantum group $E_{τ,η}(so_3)$
Creators: name: Manojlovic, Nenad
name: Nagy, Zoltan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82B23; 81R12; 81R50

description: We define the elliptic quantum group $E_{τ,η}(so_3)$ and the transfer matrix corresponding to its simplest highest weight representation. We use Bethe anstaz method to construct the creation operators as polynomials of the Lax matrix elements expressed through a recurrence relation. We give common eigenvectors and eigenvalues of the family of commuting transfer matrices.
description: 13 pages
Integrative Synergies between BRI of China and Agenda 2063 of African Union: Reviewing the Policy Documents and Analyzing the Program for Infrastructure Development in Africa-Priority Action Plan 2 (PIDA-PAP 2) (2021-2030)
Creators: name: Muhmmad Amjad Raza
name: Dr. Abdul Basit Khan
Publisher: name: Journal of Development and Social Sciences
Year: 2024
Subjects: Agenda 2063
Belt & Road Initiative
China-African Union Economic Cooperation
Program for Infrastructure Development in Africa-Priority Action Plan 2

description: This study analyzes the diverse and burgeoning relationship between China and the African Union (AU) which has significant global implications. The primary focus of the study is to explore Chinese policy commitments, competitive dynamics, capacity-building plug-ins as well as measures taken for the development of infrastructure under Priority Action Plan 2 (PAP 2) which is a landmark initiative of Program for Infrastructure Development in Africa (PIDA) to develop hydroelectric power, railways, roads, ports and information and communications technology (ICT) sectors. Furthermore, the study reviews the interconnection between the AU’s African Integrated High-Speed Railway Network (AIHSRN) Project as a case-study of China’s endeavors for the development of railways within the AU member countries. This assessment propounds an understanding of the importance of infrastructure and logistics to form collaborations, boost connectivity, and promote African economic development. The study uses a qualitative method of reasoning to investigate the basis and impact of Chinese interest and involvement within the AU. It provides the relevant researchers, experts from academia and policy makers a deep insight into the true nature of Chinese engagement within the AU which makes this study a significant addition to the currently existing literature about China-AU economic relations.
มาตรการป้องกันและปราบปรามการทารุณกรรมสัตว์ กรณีศึกษาการค้าสุนัขข้ามชาติ
Creators: name: สุพรรณิการ์ กิ่งทอง
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: ป้องกันและปราบปราม, ทารุณกรรมสัตว์, ค้าสุนัขข้ามชาติ

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร