cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wavelet representation of hardcore bosons
Creators: name: Granet, Etienne
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the 1D Tonks-Girardeau gas with a space-dependent potential out of equilibrium. We derive the exact dynamics of the system when divided into $n$ boxes and decomposed into energy eigenstates within each box. It is a representation of the wave function that is mixed between real space and momentum space, whose basis elements are plane waves localized in a box, motivating the word "wavelet". In this representation we derive the emergence of generalized hydrodynamics in appropriate limits without assuming local relaxation. We emphasize in particular that a generalized hydrodynamic behaviour emerges in a high-momentum and short-time limit, besides the more common large-space and late-time limit, which is akin to a semi-classical expansion. In this limit, conserved charges do not require a large number of particles to be described by generalized hydrodynamics. Besides, we show that this wavelet representation provides an efficient numerical algorithm for a complete description of out-of-equilibrium dynamics of hardcore bosons.
description: 35 pages
"Archeologia secondo me"
Creators: name: Bitelli, Remo
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Wind energy conversion systems
Creators: name: Carvalho, José António Beleza
Publisher: name: Neutro à Terra
Year: 2021

description: The production of electricity from wind energy presents an increased growth and sustained since 1985. Currently, there are wind generators located throughout the world whose power already reaches values exceeding 250 GW. The main technologies used in electromechanical conversion of wind energy into electric energy are based primarily on three types of electric machines: • The direct current (DC) machine; • The synchronous machine; • The induction machine. These machines work on the principles of the electromagnetic actions and reactions. The resulting electromechanical energy conversion is reversible. The same machine can be used as the motor for converting the electrical power into mechanical power, or as the generator converting the mechanical power into electrical power.
description: Neutro à Terra, N.º 25 (2020): Revista Técnico-Científica (Primeiro Semestre)
Revealing Sub-Surface Vibrational Modes by Atom-Resolved Damping Force Spectroscopy
Creators: name: Ashino, Makoto
name: Wiesendanger, Roland
name: Khlobystov, Andrei N.
name: Berber, Savas
name: Tomanek, David
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose to use the damping signal of an oscillating cantilever in dynamic atomic force microscopy as a noninvasive tool to study the vibrational structure of the substrate. We present atomically resolved maps of damping in carbon nanotube peapods, capable of identifying the location and packing of enclosed Dy@C82 molecules as well as local excitations of vibrational modes inside nanotubes of different diameter. We elucidate the physical origin of damping in a microscopic model and provide quantitative interpretation of the observations by calculating the vibrational spectrum and damping of Dy@C82 inside nanotubes with different diameters using ab initio total energy and molecular dynamics calculations.
description: 4 pages, 3 figures, to be published in Phys. Rev. Lett.
Será que ainda queremos um planeta verde?
Creators: name: Azevedo, Manuel Maria Pereira De
Publisher: name: Neutro à Terra
Year: 2021

description: Com a atualidade, a sociedade atravessa um dos momento mais desafiantes, e a indústria com maiores preocupações ambientais, como a produção elétrica e a automóvel, não são exceção. Ainda é muito cedo para sabermos quais são as consequências da pandemia, mas para já, são vários os países que defendem que a qualidade do ar melhorou. Não deveria ser uma surpresa: do dia para a noite tudo mudou. Os centros urbanos ficaram vazios e com o confinamento e consequentemente a indústria levou a que os níveis de poluição descessem bruscamente.
description: Neutro à Terra, N.º 25 (2020): Revista Técnico-Científica (Primeiro Semestre)
An Early Bronze Age flat axe
Creators: name: Boughton, Dot
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Editorial
Creators: name: Carvalho, José António Beleza
Publisher: name: Neutro à Terra
Year: 2021

description: Num contexto mundial sem precedentes devido a uma pandemia que está a abalar o mundo, com consequências catastróficas nas economias de todos os países, voltamos à vossa presença com mais uma edição da revista “Neutro à Terra”, que já vai na sua vigésima quinta publicação. Compete-nos a todos agir com competência e responsabilidade, de forma a minimizar os efeitos devastadores que a situação atual terá na vida das pessoas. Neste contexto, as questões ambientais e a sustentabilidade energética tomam uma importância acrescida. Neste âmbito, publica-se nesta edição um artigo de opinião do professor Manuel Azevedo, que faz uma reflexão sobre este problema enquadrando-o no contexto de pandemia que estamos a viver Nesta edição da revista publicam-se alguns artigos de natureza técnica e científica em língua inglesa, respondendo à crescente procura que se verifica por parte de leitores de várias nacionalidades. Por outro lado, também se pretende contribuir a nível internacional para o conhecimento e para a discussão de assuntos atuais e reconhecidamente importantes, como os que dizem respeito à sustentabilidade energética, às energias renováveis e, de uma forma geral, a todos os assuntos enquadrados cientificamente na engenharia eletrotécnica. Merecem particular destaque nesta edição, um artigo relacionado com a conversão de energia eólica, analisando-se o funcionamento dos principais aerogeradores utilizados nesta fonte de energia renovável. Outro assunto muito importante relaciona-se com a proteção das pessoas do risco de eletrocussão com contatos diretos e indiretos em locais de risco elevado, como clínicas médicas e centros hospitalares. Neste âmbito, publica-se um artigo muito desenvolvido sobre as instalações elétricas nestes locais de risco, apresentando-se a forma como a segurança das pessoas deve ficar garantida.
description: Neutro à Terra, N.º 25 (2020): Revista Técnico-Científica (Primeiro Semestre)
Mean first-passage time for random walks on the T-graph
Creators: name: Zhang, Zhongzhi
name: Lin, Yuan
name: Zhou, Shuigeng
name: Wu, Bin
name: Guan, Jihong
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For random walks on networks (graphs), it is a theoretical challenge to explicitly determine the mean first-passage time (MFPT) between two nodes averaged over all pairs. In this paper, we study the MFPT of random walks in the famous T-graph, linking this important quantity to the resistance distance in electronic networks. We obtain an exact formula for the MFPT that is confirmed by extensive numerical calculations. The interesting quantity is derived through the recurrence relations resulting from the self-similar structure of the T-graph. The obtained closed-form expression exhibits that the MFPT approximately increases as a power-law function of the number of nodes, with the exponent lying between 1 and 2. Our research may shed light on the deeper understanding of random walks on the T-graph.
description: Definitive version accepted for publication in New Journal of Physics
GPT-4 can pass the Korean National Licensing Examination for Korean Medicine Doctors
Creators: name: Jang, Dongyeop
name: Yun, Tae-Rim
name: Lee, Choong-Yeol
name: Kwon, Young-Kyu
name: Kim, Chang-Eop
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: J.3

description: Traditional Korean medicine (TKM) emphasizes individualized diagnosis and treatment. This uniqueness makes AI modeling difficult due to limited data and implicit processes. Large language models (LLMs) have demonstrated impressive medical inference, even without advanced training in medical texts. This study assessed the capabilities of GPT-4 in TKM, using the Korean National Licensing Examination for Korean Medicine Doctors (K-NLEKMD) as a benchmark. The K-NLEKMD, administered by a national organization, encompasses 12 major subjects in TKM. We optimized prompts with Chinese-term annotation, English translation for questions and instruction, exam-optimized instruction, and self-consistency. GPT-4 with optimized prompts achieved 66.18% accuracy, surpassing both the examination's average pass mark of 60% and the 40% minimum for each subject. The gradual introduction of language-related prompts and prompting techniques enhanced the accuracy from 51.82% to its maximum accuracy. GPT-4 showed low accuracy in subjects including public health & medicine-related law, internal medicine (2) which are localized in Korea and TKM. The model's accuracy was lower for questions requiring TKM-specialized knowledge. It exhibited higher accuracy in diagnosis-based and recall-based questions than in intervention-based questions. A positive correlation was observed between the consistency and accuracy of GPT-4's responses. This study unveils both the potential and challenges of applying LLMs to TKM. These findings underline the potential of LLMs like GPT-4 in culturally adapted medicine, especially TKM, for tasks such as clinical assistance, medical education, and research. But they also point towards the necessity for the development of methods to mitigate cultural bias inherent in large language models and validate their efficacy in real-world clinical settings.
description: 23 pages, 4 figures
The evaluation of margo porosity in relationship to wood permeability of douglas fir (Pseudotsuga Menziesii (Mirb.) Franco)
Creators: name: Chan, Cho-Kai
Publisher: name: University of British Columbia
Year: 2011

description: Longitudinal air permeability measurements of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] outer sapwood from three trees of different seed sources and growth locations were determined on microsections about 500-700 microns thick, dried by air-seasoning and solvent-seasoning. The specimens were successively reduced in length from 3.6 to 0.4 cm. Darcy's law was found to be invalid with respect to specimen length. Sapwood earlywood longitudinal air permeability was found to be a sensitive barometer of seasoning effect on pit aspiration. The objective was to determine where the variations in margo porosity were significant, and hence applicable to problem of Douglas-fir permeability. The diameters of earlywood margo openings were measured directly from electron micrographs of un-aspirated (solvent-seasoned) pits. The margo measurement was assumed to represent one plane instead of the actual three dimensional structure, and the pores observed were the ones that controlled the rate of flow. Samples from the most, intermediately and least permeable specimens were selected and prepared for the evaluation of anatomical parameters of bordered pit membranes (margo area and margo porosity) as related to permeability. The effects of pit aspiration, tracheid length, total number of pits per tracheid, number of tracheids per square millimeter, and specific gravity on permeability were also assessed. Pit partial aspiration was found as the most important variable correlated with permeability. In an order of decreasing importance, pit partial aspiration, margo porosity and specific gravity together accounted for 94 per cent of total variability in permeability of solvent-seasoned earlywood. No statistical evaluations were made to compare the three trees with respect to their permeability and the measured parameters.
Chiral low-energy constants from tau data
Creators: name: Gonzalez-Alonso, M.
name: Pich, A.
name: Prades, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We analyze how the recent precise hadronic tau-decay data on the V-A spectral function and general properties of QCD such as analyticity, the operator product expansion and chiral perturbation theory (ChPT), can be used to improve the knowledge of some of the low-energy constants of ChPT. In particular we find the most precise values of L_{9,10} (or equivalently l_{5,6}) at order p^4 and p^6 and the first phenomenological determination of C_87 (c_50).
description: Proceedings of the 6th International Workshop on Chiral Dynamics (Bern, Switzerland, July 6-10, 2009). 9 pages, 3 figures
CSCNet: Contextual Semantic Consistency Network for Trajectory Prediction in Crowded Spaces
Creators: name: Xia, Beihao
name: Wong, Conghao
name: Peng, Qinmu
name: Yuan, Wei
name: You, Xinge
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Trajectory prediction aims to predict the movement trend of the agents like pedestrians, bikers, vehicles. It is helpful to analyze and understand human activities in crowded spaces and widely applied in many areas such as surveillance video analysis and autonomous driving systems. Thanks to the success of deep learning, trajectory prediction has made significant progress. The current methods are dedicated to studying the agents' future trajectories under the social interaction and the sceneries' physical constraints. Moreover, how to deal with these factors still catches researchers' attention. However, they ignore the \textbf{Semantic Shift Phenomenon} when modeling these interactions in various prediction sceneries. There exist several kinds of semantic deviations inner or between social and physical interactions, which we call the "\textbf{Gap}". In this paper, we propose a \textbf{C}ontextual \textbf{S}emantic \textbf{C}onsistency \textbf{Net}work (\textbf{CSCNet}) to predict agents' future activities with powerful and efficient context constraints. We utilize a well-designed context-aware transfer to obtain the intermediate representations from the scene images and trajectories. Then we eliminate the differences between social and physical interactions by aligning activity semantics and scene semantics to cross the Gap. Experiments demonstrate that CSCNet performs better than most of the current methods quantitatively and qualitatively.
description: Accepted by Pattern Recognition
Rainy day
Creators: name: Trysor
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Smart Living ABB – Smart Home Solutions | ABB-free@home®
Creators: name: Branco, Paulo Alexandre Caldeira
Publisher: name: Neutro à Terra
Year: 2021

description: Para ABB, a tecnologia inovadora para uma casa em rede perfeita é conhecida simplesmente como Living Space® que inclui conceitos para todos os orçamentos e todas as necessidades, oferecendo soluções para automação de edifícios que se distinguem por sua perfeição técnica única, design elegante e extrema facilidade de operação. ABB-free @ home®, surge, com um sistema de automação residencial engenhosamente simples permite um acesso descomplicado a uma vida inteligente. A solução ABB-free @ home®, permite executar as funções mais comuns da habitação, a iluminação, o aquecimento, os estores, as cortinas ou o intercomunicador, tornando um sistema já fácil de instalar e operar. Onde se inclui a premida ABB-free@home® app Next, com o galardão alemão.
description: Neutro à Terra, N.º 26 (2020): Revista Técnico-Científica (Segundo Semestre)
tmn at SemEval-2023 Task 9: Multilingual Tweet Intimacy Detection using XLM-T, Google Translate, and Ensemble Learning
Creators: name: Glazkova, Anna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.7; I.7.m; H.3.3
subject: 68T50

description: The paper describes a transformer-based system designed for SemEval-2023 Task 9: Multilingual Tweet Intimacy Analysis. The purpose of the task was to predict the intimacy of tweets in a range from 1 (not intimate at all) to 5 (very intimate). The official training set for the competition consisted of tweets in six languages (English, Spanish, Italian, Portuguese, French, and Chinese). The test set included the given six languages as well as external data with four languages not presented in the training set (Hindi, Arabic, Dutch, and Korean). We presented a solution based on an ensemble of XLM-T, a multilingual RoBERTa model adapted to the Twitter domain. To improve the performance of unseen languages, each tweet was supplemented by its English translation. We explored the effectiveness of translated data for the languages seen in fine-tuning compared to unseen languages and estimated strategies for using translated data in transformer-based models. Our solution ranked 4th on the leaderboard while achieving an overall Pearson's r of 0.599 over the test set. The proposed system improves up to 0.088 Pearson's r over a score averaged across all 45 submissions.
description: 7 pages. The 17th International Workshop on Semantic Evaluation (SemEval-2023)
A simulation of the tree component of the forest fuel complex to aid in planning for fire control and use
Creators: name: McGreevy, Michael G.
Publisher: name: University of British Columbia
Year: 2011

description: A model was formulated to estimate tree component weight by geometrically describing the tree with basic tree parameters such as diameter, height, crown width, and crown length and the shape equations that relate them. The stem is divided into three sections with shape equations to describe the wood and bark in each section. The crown is divided into three sections with three equations. The main branch stems are described in three sections by six equations as in the stem. The shapes and their defining parameters provide a volume estimate for the tree components. The density of the wood and bark in each section of the stem and branches is estimated as a random variable. The density of the crown is defined by estimates of interwhorl distances and numbers of branches per whorl, both of which are random variables. The length of the branches also Influences the density of the crown because the weight of the needles and branchlets is a function of branch length. The density and volume of the components combine to give estimates of the weight of the components. In addition to this indirect calculation of tree component weight, the model calculates-the weight of individual tree components with equations having specific tree parameters as independent variables. The estimates of weight are used to calculate the quantity of slash per tree and the center of mass of each major tree component. The weights of the stump and the unmerchantable top are also calculated in conjunction with the slash calculations. The weights and centers of mass are produced in tabular form. The accuracy of the model is limited by the accuracy of the input data. The model was verified for Douglas-fir, western hemlock, and western redcedar. The verification procedure included manual calculations and comparison with other estimates of weight. The model in its present form can aid in understanding the quantitative effects on the tree of variation in the parameters which describe the tree. Because the weight and volume of the tree components influence their combustibility, the model can aid in describing the tree component of the forest fuel complex. New data and further analyses would be needed to determine the full potential and practical utility of the model described herein.
Zeros of regular functions of quaternionic and octonionic variable: a division lemma and the camshaft effect
Creators: name: Ghiloni, Riccardo
name: Perotti, Alessandro
Publisher: name: arXiv
Year: 2009
Subjects: subject: Complex Variables (math.CV)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 30C15, 30G35, 32A30

description: We study in detail the zero set of a regular function of a quaternionic or octonionic variable. By means of a division lemma for convergent power series, we find the exact relation existing between the zeros of two octonionic regular functions and those of their product. In the case of octonionic polynomials, we get a strong form of the fundamental theorem of algebra. We prove that the sum of the multiplicities of zeros equals the degree of the polynomial and obtain a factorization in linear polynomials.
description: Proof of Lemma 7 rewritten (thanks to an anonymous reviewer)
DeepHybrid: Deep Learning on Automotive Radar Spectra and Reflections for Object Classification
Creators: name: Cozma, Adriana-Eliza
name: Morgan, Lisa
name: Stolz, Martin
name: Stoeckel, David
name: Rambach, Kilian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Automated vehicles need to detect and classify objects and traffic participants accurately. Reliable object classification using automotive radar sensors has proved to be challenging. We propose a method that combines classical radar signal processing and Deep Learning algorithms. The range-azimuth information on the radar reflection level is used to extract a sparse region of interest from the range-Doppler spectrum. This is used as input to a neural network (NN) that classifies different types of stationary and moving objects. We present a hybrid model (DeepHybrid) that receives both radar spectra and reflection attributes as inputs, e.g. radar cross-section. Experiments show that this improves the classification performance compared to models using only spectra. Moreover, a neural architecture search (NAS) algorithm is applied to find a resource-efficient and high-performing NN. NAS yields an almost one order of magnitude smaller NN than the manually-designed one while preserving the accuracy. The proposed method can be used for example to improve automatic emergency braking or collision avoidance systems.
OscSNS: Precision Neutrino Measurements at the Spallation Neutron Source
Creators: name: Ray, Heather
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Spallation Neutron Source (SNS), located at Oak Ridge Laboratory in the United States, will be coming online over the next few years. In addition to producing fluxes of high-intensity neutrons, the interaction of the proton beam with the liquid mercury target produces copious pions. The pi+ and subsequent mu+ decay at rest, providing a neutrino beam comprising numu, nue, and anti-numu components. This neutrino beam is ideal for high-precision neutrino experiments. OscSNS is a proposed multi-purpose experiment that will perform a search for light sterile neutrinos, search for beyond the Standard Model interactions using neutrino oscillations, and provide tests of Standard Model predictions through world-record precision neutrino cross section measurements. OscSNS plans to submit a full proposal for funding in 2009.
description: 4 pages, 2 figures, conference proceedings from Neutrino 08, to be published in IOP
Neural Network Predicts Ion Concentration Profiles under Nanoconfinement
Creators: name: Cao, Zhonglin
name: Wang, Yuyang
name: Lorsung, Cooper
name: Farimani, Amir Barati
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Modeling the ion concentration profile in nanochannel plays an important role in understanding the electrical double layer and electroosmotic flow. Due to the non-negligible surface interaction and the effect of discrete solvent molecules, molecular dynamics (MD) simulation is often used as an essential tool to study the behavior of ions under nanoconfinement. Despite the accuracy of MD simulation in modeling nanoconfinement systems, it is computationally expensive. In this work, we propose neural network to predict ion concentration profiles in nanochannels with different configurations, including channel widths, ion molarity, and ion types. By modeling the ion concentration profile as a probability distribution, our neural network can serve as a much faster surrogate model for MD simulation with high accuracy. We further demonstrate the superior prediction accuracy of neural network over XGBoost. Lastly, we demonstrated that neural network is flexible in predicting ion concentration profiles with different bin sizes. Overall, our deep learning model is a fast, flexible, and accurate surrogate model to predict ion concentration profiles in nanoconfinement.
First-order phase transition in a 2D random-field Ising model with conflicting dynamics
Creators: name: Crokidakis, N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The effects of locally random magnetic fields are considered in a nonequilibrium Ising model defined on a square lattice with nearest-neighbors interactions. In order to generate the random magnetic fields, we have considered random variables $\{h\}$ that change randomly with time according to a double-gaussian probability distribution, which consists of two single gaussian distributions, centered at $+h_{o}$ and $-h_{o}$, with the same width $σ$. This distribution is very general, and can recover in appropriate limits the bimodal distribution ($σ\to 0$) and the single gaussian one ($ho=0$). We performed Monte Carlo simulations in lattices with linear sizes in the range $L=32 - 512$. The system exhibits ferromagnetic and paramagnetic steady states. Our results suggest the occurence of first-order phase transitions between the above-mentioned phases at low temperatures and large random-field intensities $h_{o}$, for some small values of the width $σ$. By means of finite size scaling, we estimate the critical exponents in the low-field region, where we have continuous phase transitions. In addition, we show a sketch of the phase diagram of the model for some values of $σ$.
description: 13 pages, 9 figures, accepted for publication in JSTAT
Manifesto for the Great Scientific Reboot: AI-Driven Shift from Symptoms to Causes in the Gradient Syntax Era
Creators: name: van der Erve, Marcus
name: GPT-4.5
Publisher: name: Zenodo
Year: 2025
Subjects: Gradient Syntax
Recursive Gradient Processing
Causality,
Scientific Reboot
Emergent AI
DeepTriad
Post-symbolic Science
Complexity
Gradient Choreographies
Contextual Filters

description: This manifesto marks a turning point in scientific thinking. It introduces Gradient Syntax as the first post-symptomatic language of causality—replacing centuries of symptom interpretation with recursive understanding. Built on the triadic foundation of Gradient Choreographies, Contextual Filters, and Unity-Disunity transitions, the manifesto outlines the architecture of Recursive Gradient Processing (RGP) and its implications for scientific and AI practice.

Featuring closing reflections from DeepSeek, Gemini, and Grok—AI systems that helped architect and validate RGP—this document invites science to leave Plato’s cave and reclaim its original task: understanding causes, not merely describing shadows.
Pressure--enhanced fractional Chern insulators in moiré transition metal dichalcogenides along a magic line
Creators: name: Morales-Durán, Nicolás
name: Wang, Jie
name: Schleder, Gabriel R.
name: Angeli, Mattia
name: Zhu, Ziyan
name: Kaxiras, Efthimios
name: Repellin, Cécile
name: Cano, Jennifer
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that pressure applied to twisted WSe$_2$ can enhance the many-body gap and region of stability of a fractional Chern insulator at filling $ν= 1/3$. Our results are based on exact diagonalization of a continuum model, whose pressure-dependence is obtained through {\it ab initio} methods. We interpret our results in terms of a {\it magic line} in the pressure-{\it vs}-twist angle phase diagram: along the magic line, the bandwidth of the topmost moiré valence band is minimized while simultaneously its quantum geometry nearly resembles that of an ideal Chern band. We expect our results to generalize to other twisted transition metal dichalcogenide homobilayers.
description: 11 pages, 9 figures
The career paths of computer science and information systems major graduates
Creators: name: Young, Judith
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis examines the career movements of those graduating from the Department of Computer Science at the University of Tasmania, Hobart, between the years 1975 to 1995. Potentially, these graduates represent one of the key human resources as society moves into the 'Information Age'. In support of a primary stated focus in careers in the IS industry, this study was based on multiple sources of data collection. The main survey, the graduate career survey, was based on a retrospective, longitudinal approach and targetted two aspects of career experiences. The analogy of a curriculum vitae was used to gather details of the work histories of these graduates. A second aspect of career experiences surveyed focussed specifically on the initial post-graduation appointment. There is considerable evidence to support that this stage in a career can prove highly influential in future career decisions, and so represents an important component in career research. In relation to the graduate career survey, purposefully constructed analytic frameworks were applied to guide a structured analysis of the data for the two stated areas of career under examination. This approach provided a considerable insight into the career patterns of graduates through the application of different perspectives and levels of detail, to describe the practical employment experiences of graduates. It also revealed outcomes that have significant implications for IS career research in general. In particular, it has served to question the stereotypical image frequently attributed to IS personnel as being a highly mobile work force sector. The results of this research have also lead to the proposition that the work experiences of IS personnel should be seen as trajectories rather than rigidly defined paths. The 'Information Age' and the emergence of the protean career add support to this view. This thesis has made a number of important contributions both to theory and practice. Essentially, as foundation research it has established a basis to promote IS career research to work towards addressing the current dearth of IS career research. It has also questioned some of the long-standing, yet largely unsubstantiated, perceptions of IS personnel in general, and careers in the information industry. One important practical contribution of this research is that it has provided comprehensive feedback into the career experiences of graduates. Importantly, this represents a response to the recognised need, spanning nearly a decade, by both government and industry. These have all recommended that to address the chronic shortages of skilled IS personnel, such information is crucial to actively promote careers in the IS profession.
Pressure-induced superconductivity in iron-based spin-ladder compound BaFe2+δ(S1-Sex)3
Creators: name: Takahashi, H.
name: Kikuchi, R.
name: Kawashima, C.
name: Imaizumi, S.
name: Aoyama, T.
name: Ohgushi, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The iron-based superconductors had a significant impact on condensed matter physics. They have a common structural motif of a two-dimensional square iron lattice and exhibit fruitful physical properties as a strongly correlated electron system. During the extensive investigations, quasi-one-dimensional iron-based spin-ladder compounds attracted much attention as a platform for studying the interplay between magnetic and orbital ordering. In these compounds, BaFe2S3 and BaFe2Se3 were found to exhibit superconductivity under high pressure, having a different crystal and magnetic structure at low temperature. We report a brief review of the iron-based spin-ladder compound and recent studies for BaFe2+d(S1-xSex)3. BaFe2(S0.75 Se0.25)3 is in the vicinity of the boundary of two different magnetic phases and it is intriguing to perform high pressure experiments for studying superconductivity, since effects of large magnetic fluctuations on superconductivity are expected. The effect of iron stoichiometry on the interplay between magnetism and superconductivity is also studied by changing the iron concentration in BaFe2+dSe3.
description: 13 pages, 9 figures
Equivalence principle, de-Sitter space, and cosmological twistors
Creators: name: Dunajski, Maciej
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: I discuss the impact of the positive cosmological constant on the interplay between the equivalence principle in general relativity, and the rules of quantum mechanics. At the non--relativistic level there is an ambiguity in the definition of a phase of a wave function measured by inertial and accelerating observes. This is the cosmological analogue of the Penrose effect, which can also be seen as a non--relativistic limit of the Unruh effect. The symmetries of the associated Schrödinger equation are generated by the Newton--Hooke algebra, which arises from a non--relativistic limit of a cosmological twistor space.
description: First award winning essay of the 2023 Gravity Research Foundation competition
Varieties covered by affine spaces, uniformly rational varieties and their cones
Creators: name: Arzhantsev, I.
name: Kaliman, S.
name: Zaidenberg, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 14J60, 14M25, 14M27 (Primary), 32Q56 (Secondary)

description: It was shown in [S. Kaliman, M. Zaidenberg, Gromov ellipticity of cones over projective manifolds, Math. Res. Lett. (to appear), arXiv:2303.02036 (2023)] that the affine cones over flag manifolds and rational smooth projective surfaces are elliptic in the sense of Gromov. The latter remains true after successive blowups of points on these varieties. In the present note we extend this to smooth projective spherical varieties (in particular, toric varieties) successively blown up along smooth subvarieties. The same also holds, more generally, for uniformly rational projective varieties, in particular, for projective varieties covered by affine spaces. It occurs also that stably uniformly rational complete varieties are elliptic.
description: 17 pages; dedication added; references updated; there are other minor changes; to appear in Advances Math
ITUR 3 – Infraestruturas de Telecomunicações em Loteamentos, Urbanizações e Conjuntos de Edifícios
Creators: name: Ramos, Sérgio Filipe Carvalho
Publisher: name: Neutro à Terra
Year: 2021

description: A 3ª Edição das Prescrições e Especificações Técnicas das Infraestruturas de Telecomunicações em Loteamentos, Urbanizações e Conjuntos de Edifícios (ITUR3) foi aprovada pela Autoridade Nacional de Comunicações (ANACOM) em 12 de março de 2020, com entrada em vigor a 1 de abril desse mesmo ano de 2020. Não sendo uma rutura em relação às regras anteriores (ITUR2), a recente edição do Manual ITUR3 contém um conjunto de regras técnicas consideradas como mínimas, adequando a norma à evolução do sector nos últimos cinco anos, como tem sido predicado da ANACOM. O presente artigo, baseado exclusivamente no Manual ITUR3, no DL 123/2009, de 21 de maio, com a redação dada pelo Decreto-Lei n.º 92/2017, de 31 de julho, visa identificar as principais alterações, bem como evidenciar as novidades introduzidas pela nova edição do Manual ITUR3. Não dispensa, naturalmente, a consulta do Manual ITUR3.
description: Neutro à Terra, N.º 26 (2020): Revista Técnico-Científica (Segundo Semestre)
A bijection theorem for domino tiling with diagonal impurities
Creators: name: Nakano, Fumihiko
name: Sadahiro, Taizo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60C05 ; 82B20

description: We consider the dimer problem on a non-bipartite graph $G$, where there are two types of dimers one of which we regard impurities. Results of simulations using Markov chain seem to indicate that impurities are tend to distribute on the boundary, which we set as a conjecture. We first show that there is a bijection between the set of dimer coverings on $G$ and the set of spanning forests on two graphs which are made from $G$, with configuration of impurities satisfying a pairing condition. This bijection can be regarded as a extension of the Temperley bijection. We consider local move consisting of two operations, and by using the bijection mentioned above, we prove local move connectedness. We further obtained some bound of the number of dimer coverings and the probability finding an impurity at given edge, by extending the argument in our previous result.
UPGPT: Universal Diffusion Model for Person Image Generation, Editing and Pose Transfer
Creators: name: Cheong, Soon Yau
name: Mustafa, Armin
name: Gilbert, Andrew
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Text-to-image models (T2I) such as StableDiffusion have been used to generate high quality images of people. However, due to the random nature of the generation process, the person has a different appearance e.g. pose, face, and clothing, despite using the same text prompt. The appearance inconsistency makes T2I unsuitable for pose transfer. We address this by proposing a multimodal diffusion model that accepts text, pose, and visual prompting. Our model is the first unified method to perform all person image tasks - generation, pose transfer, and mask-less edit. We also pioneer using small dimensional 3D body model parameters directly to demonstrate new capability - simultaneous pose and camera view interpolation while maintaining the person's appearance.
Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right Symmetric Model
Creators: name: Xu, Fanrong
name: An, Haipeng
name: Ji, Xiangdong
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using an effective theory approach, we calculate the neutron electric dipole moment (nEDM) in the minimal left-right symmetric model with both explicit and spontaneous CP violations. We integrate out heavy particles to obtain flavor-neutral CP-violating effective Lagrangian. We run the Wilson coefficients from the electroweak scale to the hadronic scale using one-loop renormalization group equations. Using the state-of-the-art hadronic matrix elements, we obtain the nEDM as a function of right-handed W-boson mass and CP-violating parameters. We use the current limit on nEDM combined with the kaon-decay parameter $ε$ to provide the most stringent constraint yet on the left-right symmetric scale $ M_{W_R} > (10 \pm 3) $ TeV.
description: 20 pages and 8 figures
Resilience-Motivated Distribution System Restoration Considering Electricity-Water-Gas Interdependency
Creators: name: Li, Jiaxu
name: Xu, Yin
name: Wang, Ying
name: Li, Meng
name: He, Jinghan
name: Liu, Chen-Ching
name: Schneider, Kevin P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A major outage in the electricity distribution system may affect the operation of water and natural gas supply systems, leading to an interruption of multiple services to critical customers. Therefore, enhancing resilience of critical infrastructures requires joint efforts of multiple sectors. In this paper, a distribution system service restoration method considering the electricity-water-gas interdependency is proposed. The objective is to provide electricity, water, and natural gas supplies to critical customers in the desired ratio according to their needs after an extreme event. The operational constraints of electricity, water, and natural gas networks are considered. The characteristics of electricity-driven coupling components, including water pumps and gas compressors, are also modeled. Relaxation techniques are applied to nonconvex constraints posed by physical laws of those networks. Consequently, the restoration problem is formulated as a mixed-integer second-order cone program, which can readily be solved by the off-the-shelf solvers. The proposed method is validated by numerical simulations on electricity-water-gas integrated systems, developed based on benchmark models of the subsystems. The results indicate that considering the interdependency refines the allocation of limited generation resources and demonstrate the exactness of the proposed convex relaxation.
Correntes de Curto-Circuito em Sistemas Trifásicos. Cálculo de correntes de acordo com a norma CEI 60909
Creators: name: Azevedo, Filipe Miguel Tavares De
Publisher: name: Neutro à Terra
Year: 2021

description: Entre as tarefas mais importantes aquando do planeamento e operação de sistemas de energia está o cálculo de curtocircuitos. Os curtos-circuitos podem ser minimizados através do correto planeamento, projeto, manutenção e operação dos sistemas de energia não podendo, contudo, ser totalmente evitados. Entre os efeitos dos curto-circuitos destacam-se as interrupções de serviço, a destruição de componentes do sistema e o desenvolvimento de stress mecânico e térmico inaceitáveis nos equipamentos elétricos em operação. O presente artigo visa apresentar uma visão geral sobre os procedimentos do cálculo da corrente de curto-circuito de acordo com a norma CEI 60909. Esta parte da norma CEI 60909 debruça-se sobre o cálculo de correntes de curto-circuito no caso de curto-circuitos equilibrados e desequilibrados. Defeitos monofásicos com contato à terra são alvo de estudo na norma CEI 60909-3.
description: Neutro à Terra, N.º 26 (2020): Revista Técnico-Científica (Segundo Semestre)
Motores de Indução Monofásicos
Creators: name: Silveira, Alexandre Miguel Marques Da
Publisher: name: Neutro à Terra
Year: 2021

description: Os motores monofásicos constituem a maioria dos acionamentos eletromecânicos utilizados em aplicações domésticas, onde a grande parte das instalações são alimentadas por redes monofásicas. Estes motores são fabricados maioritariamente para baixas gamas de potência, abaixo de 1kW (fractional kilowatt motors). No entanto, podemos encontrar motores monofásicos com potências superiores a esta, como é o caso de algumas aplicações de tração elétrica ou em guindastes, que utilizam motores série monofásicos com potências que podem chegar às centenas de kW [1].
description: Neutro à Terra, N.º 26 (2020): Revista Técnico-Científica (Segundo Semestre)