cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Temperature dependent convective parameters for RRc 1D-models
Creators: name: Kovács, Gábor B.
name: Nuspl, János
name: Szabó, Róbert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Nonlinear pulsation modeling of classical variable stars is among the first topics which were developed at the beginning of the computational era. Various developments were made, and many questions were answered in the past 60 years, and the models became more complex, describing the genuinely 3D convection in a single dimension. Despite its successes, the recent public availability of the MESA Radial Stellar Pulsations (MESA RSP) module and the emerging results from multidimensional codes made clear that the 8 free convective parameters, unique to these models, together with the underlying physical models need calibration. This could be done by comparing them against multi-dimensional codes, but before that, it is important to scrutinize the free parameters of the 1D codes using observations. This is a follow-up work of our previous calibration on the convective parameters of the Budapest-Florida and MESA RSP pulsation codes for RRab stars. In this paper, we extend the previous calibration to the RRc stars and the RR Lyrae stars in general. We found that correlations of some of the parameters are present in RRc stars as well but have a different nature, while high-temperature RRc stars' pulsation properties are very sensitive to the chosen parameter sets.
description: Accepted in MNRAS, 6 pages, 7 figures
CRS blames human error for Odisha triple rail disaster 2023
Creators: name: S. Rameshwar Rao
Publisher: name: Zenodo
Year: 2023
Subjects: Rail disaster, India, Engineering failure, Transportation Safery,

description: This research paper analyses the conclusions of the CRS investigation.into the evening of June 2 2023 when three trains — Kolkata-Chennai Coromandel Express, Bengaluru-Howrah Superfast Express and a goods train — were involved in one of the worst railway tragedies in the country in the last three decades that left at least 293 dead and nearly 1,100 injured in Balasore
UnifiedGesture: A Unified Gesture Synthesis Model for Multiple Skeletons
Creators: name: Yang, Sicheng
name: Wang, Zilin
name: Wu, Zhiyong
name: Li, Minglei
name: Zhang, Zhensong
name: Huang, Qiaochu
name: Hao, Lei
name: Xu, Songcen
name: Wu, Xiaofei
name: yang, changpeng
name: Dai, Zonghong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: The automatic co-speech gesture generation draws much attention in computer animation. Previous works designed network structures on individual datasets, which resulted in a lack of data volume and generalizability across different motion capture standards. In addition, it is a challenging task due to the weak correlation between speech and gestures. To address these problems, we present UnifiedGesture, a novel diffusion model-based speech-driven gesture synthesis approach, trained on multiple gesture datasets with different skeletons. Specifically, we first present a retargeting network to learn latent homeomorphic graphs for different motion capture standards, unifying the representations of various gestures while extending the dataset. We then capture the correlation between speech and gestures based on a diffusion model architecture using cross-local attention and self-attention to generate better speech-matched and realistic gestures. To further align speech and gesture and increase diversity, we incorporate reinforcement learning on the discrete gesture units with a learned reward function. Extensive experiments show that UnifiedGesture outperforms recent approaches on speech-driven gesture generation in terms of CCA, FGD, and human-likeness. All code, pre-trained models, databases, and demos are available to the public at https://github.com/YoungSeng/UnifiedGesture.
description: 16 pages, 11 figures, ACM MM 2023
Tetragonia
Creators: name: Manning, John
name: Klak, Cornelia
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Aizoaceae
Tetragonia

description: Series Tetragonia   Tetragonia [unranked] Fruticulosae Fenzl in Flora capensis 2: 460 (1892), nom. inval.
 Tetragonia series Fruticulosae Adamson in Journal of South African Botany 21: 112 (1955), nom. inval.
 Species: T. arbuscula Fenzl, T. arbusculoides Engl., T. calycina Fenzl, T. fruticosa L., T. glauca Fenzl, T. macroptera Pax, T. reduplicata Welw. ex Oliv., T. rangeana Engl., T. spicata L.f., T. virgata Schltr.
 Note: The Chilean species T. macrocarpa Phil. was erroneously included in this series by Klak et al. (2017) instead of the southern African T. macroptera Pax.
description: Published as part of Manning, John & Klak, Cornelia, 2022, New infrageneric taxa in Leucospermum (Proteaceae) and Tetragonia L. (Aizoaceae) and a new name in Aizoon subgenus Galenia (Aizoaceae) in southern Africa, pp. 1-5 in Bothalia (a 11) (a 11) 52 (1) on page 3, DOI: 10.38201/btha.abc.v52.i1.11, http://zenodo.org/record/10515159
(202765) Alfred Henry Barlow
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
(202767) Frederick Dumergue
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
(202768) Fanny Dumergue
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
At the frontiers of cosmic history: How ALMA and JWST Team Up to Confirm High-Redshift Galaxy Candidates
Creators: name: Gandolfi, Giovanni
Publisher: name: Zenodo
Year: 2023

description: JWST's ability to observe in the infrared range has pushed the limit of galaxy redshift to greater than 10. The first data release has led to the discovery of over a hundred candidate galaxies at z > 11. Some of these candidates have been identified as being heavily extinguished and feature mature stellar populations; whereas other candidates, dubbed "blue monsters", are bright and dust-free objects characterized by blue UV slopes, challenging the current theoretical models. However, some of these candidates may also be low-redshift contaminants, making it crucial to confirm their nature. After a state-of-the-art review of these JWST high-redshift galaxies candidates, I will showcase how multi-band ALMA follow-up observations can provide essential insights into the nature, physical properties, and redshift of such objects. ALMA, with its precise measurements, high resolution, and sensitivity, operating at millimetre and submillimeter wavelengths, is an essential instrument for confirming the redshift and physical properties of these JWST high-z galaxy candidates. Ultimately, I will show how the synergy between ALMA and JWST has the potential to lead to groundbreaking discoveries on the early Universe.
title: Status and recent developments at the polarized-electron injector of the superconducting Darmstadt electron linear accelerator S-DALINAC
Creators: name: Poltoratska, Y.
name: Eckardt, C.
name: Ackermann, W.
name: Aulenbacher, K.
name: Bahlo, T.
name: Barday, R.
name: Brunken, M.
name: Burandt, C.
name: Eichhorn, R.
name: Enders, J.
name: Espig, M.
name: Franke, S.
name: Ingenhaag, C.
name: Lindemann, J.
name: Müller, W. F. O.
name: Platz, M.
name: Roth, M.
name: Schneider, F.
name: Wagner, M.
name: Weber, A.
name: Weiland, T.
name: Zwicker, B.
Publisher: name: IOP Publishing
Year: 2024

description: At the superconducting Darmstadt electron linac a 100 keV source of polarized electrons has been installed. Major components had been tested prior to installation at an offline teststand. Commissioning of the new source at the S-DALINAC will take place early in 2011. We report on the performance of the teststand, simulations, developments on the laser systems, new radio-frequency components for the S-DALINAC injector, and the status of the implementation of the source.
Characterizing Speed Performance of Multi-Agent Reinforcement Learning
Creators: name: Wiggins, Samuel
name: Meng, Yuan
name: Kannan, Rajgopal
name: Prasanna, Viktor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Multi-Agent Reinforcement Learning (MARL) has achieved significant success in large-scale AI systems and big-data applications such as smart grids, surveillance, etc. Existing advancements in MARL algorithms focus on improving the rewards obtained by introducing various mechanisms for inter-agent cooperation. However, these optimizations are usually compute- and memory-intensive, thus leading to suboptimal speed performance in end-to-end training time. In this work, we analyze the speed performance (i.e., latency-bounded throughput) as the key metric in MARL implementations. Specifically, we first introduce a taxonomy of MARL algorithms from an acceleration perspective categorized by (1) training scheme and (2) communication method. Using our taxonomy, we identify three state-of-the-art MARL algorithms - Multi-Agent Deep Deterministic Policy Gradient (MADDPG), Target-oriented Multi-agent Communication and Cooperation (ToM2C), and Networked Multi-Agent RL (NeurComm) - as target benchmark algorithms, and provide a systematic analysis of their performance bottlenecks on a homogeneous multi-core CPU platform. We justify the need for MARL latency-bounded throughput to be a key performance metric in future literature while also addressing opportunities for parallelization and acceleration.
Monitoring H$α$ Emission from the Wide-orbit Brown-dwarf Companion FU Tau B
Creators: name: Wu, Ya-Lin
name: Cheng, Yu-Chi
name: Huang, Li-Ching
name: Bowler, Brendan
name: Close, Laird
name: Tseng, Wei-Ling
name: Chen, Ning
name: Chen, Da-Wei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Monitoring mass accretion onto substellar objects provides insights into the geometry of the accretion flows. We use the Lulin One-meter Telescope to monitor H$α$ emission from FU Tau B, a $\sim$19 $M_{\rm Jup}$ brown-dwarf companion at 5.7" (719 au) from the host star, for six consecutive nights. This is the longest continuous H$α$ monitoring for a substellar companion near the deuterium-burning limit. We aim to investigate if accretion near the planetary regime could be rotationally modulated as suggested by magnetospheric accretion models. We find tentative evidence that H$α$ mildly varies on hourly and daily timescales, though our sensitivity is not sufficient to definitively establish any rotational modulation. No burst-like events are detected, implying that accretion onto FU Tau B is overall stable during the time baseline and sampling windows over which it was observed. The primary star FU Tau A also exhibits H$α$ variations over timescales from minutes to days. This program highlights the potential of monitoring accretion onto substellar objects with small telescopes.
description: Published in AJ
Urban Experience And Design, (Org.) by Justin B. Hollander and Ann Sussman, Book Review
Creators: name: Neves, Pedro Soares
Publisher: name: AIS - Architecture Image Studies
Year: 2022

description: This collection of articles, turned into chapters, shows of great significance for the contribution of knowledge about the connection between User Urban Experience and our built environment. In the interception of architecture, planning, design and psychology. Although not specifically in line with the User Experience (UX) writings that blends borders between digital and physical world (such as the works of Don Norman), this book talks about the use of specific technologies and biological interpretations. In some chapters Biometric eye tracking and terms as fixation, saccade and pre-attentive processing will be the foundation for collecting data on urban conditions that respond to innate human needs. We can find insights from neuroscience such as the fact that most of our brains work, happens without any conscious awareness of control (11 billions bits of information from the body per second, conscious brain handle 50 of this bits per second (Mlodinow, L., 2013). Subliminal: How your unconscious mind rules your behaviour. New York: Vintage.) Using eye tracking to create buildings people easily take in is proposed, giving an example how art can perhaps create a positive of urban experience. Face bias, and the relevance of façade, as mammals looking at faces make us feel safe and at our best. We as social species look for relationships all the time (Porges, S. W. (2017). The pocket guide to the polyvagal theory: The transformative power of feeling safe. New York: Norton.).
description: AIS - Architecture Image Studies, Vol 2 No 2 (2021): Science Fiction Concept of Change
Maps apps, street level imagery live as traffic information
Creators: name: Neves, Pedro Soares
Publisher: name: AIS - Architecture Image Studies
Year: 2022

description: Map applications use very distinct times for updating satellite, traffic information or street level imagery. Street level imagery is the less updated and traffic information is updated continuously. Having as departure point the analysis of traffic data consistency facing reality (using as case study a group of streets in Lisbon). This article explores the traffic information updating processes and places them in relation with the state of the art street level imagery renovation efforts. References, about traffic sources of information and crowd sourcing street level imagery, will be analysed and placed in relation with the potential role of crowd sourcing trough specific creative communities.
description: AIS - Architecture Image Studies, Vol 2 No 2 (2021): Science Fiction Concept of Change
title: Applications of quantitative spatial models in spatial and urban planning
Creators: name: Makovsky, Lukas
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2023

description: In the three chapters of this thesis I analyse issues related to spatial and urban planning in the context of the Czech Republic. Besides standard reduced-form methods, I employ quantitative spatial models that are gradually more commonly used in the urban and regional economic research. First, quantitative spatial models allow to circumvent problem of not observing some data, and second, to study second-order general equilibrium adjustment effects that cannot be captured within reduced-form empirical methods. In the first chapter I estimate agglomeration wage economies across the country. As wage data at a sufficiently detailed geographical level are not available, I have used a quantitative spatial model to infer them from commuting patterns. In the second stage, I then estimated the effect of labour market size and density of employment on wages. Labour-market level wage elasticity of 0.07 is somewhat larger, but comparable with existing literature. Additionally, I show agglomeration economies are rising with level of education achieved. The second chapter analyses housing construction constraints caused by spatial planning and building permitting processes. First, I show reduced-form evidence indicates that an increase in stringency of these two types of policies decreases new construction. Second, I embed a realistic housing production function into an existing quantitative spatial model framework and calibrate it on data from 1991 to 2011 to predict counterfactual scenarios. Realistic relaxation of policies could increase households’ indirect utility by up to 4%. In the third chapter I investigate effects of noise on open green spaces amenity value in the city of Prague. To control for unobserved quality of greenery I use a quantitative spatial model to back-out their quality using survey data of places used for recreation. The results show noise decreases value of greenery, but only if accessible greenery is spatially concentrated.
Evaluating Concept of Intervention on Historical Environment over Nieto& Sobejano Architects’ Practices
Creators: name: Tabak, Pınar
name: Sirel, Ayse
Publisher: name: AIS - Architecture Image Studies
Year: 2022

description: Historical structures’ functions may not be sufficient in today’s conditions. Designers’ duty is to support transformations of historical structures that grew multi-layered until today. Purpose of this research is to show that it is possible making contemporary interventions respectful towards original characteristics to prevent them become isolated and to enable sustainable conservation. Interventions show differences due to increasing materials’ variety and improved technologies. These type of interventions especially in Europe have widened. It has become a common practice restoring historical structures using contemporary construction techniques. In the context of the research, the integrity of contemporary interventions in historical environment and the success of these over three cases of Nieto Sobejano Architects’ Office in Europe are analysed. Nieto&Sobejano Architects is a Spanish oriented architectural office established by Fuensanto Nieto and Enrique Sobejano. In the context, case studies- Moritzburg Museum, Joanneum Museum and San Telmo Museum are discussed. Contemporary interventions are inspected over the design approach criteria, place of addition, formative design criteria and other parameters. Additions of case studies give positive impact on historical structures, promote them to become attraction points in urban context
description: AIS - Architecture Image Studies, Vol 2 No 2 (2021): Science Fiction Concept of Change
D6.4 – Gendering Scientific Publications Guidelines
Creators: name: Santinhos, Miguel
name: Colaiacomo, Claudio
name: Rosetta, Federica
name: Żadkowska, Magdalena
name: Kosakowska-Berezecka, Natasza
name: BALZANO, ANGELA
name: SOLERA, Cristina
Publisher: name: Zenodo
Year: 2024

description: This deliverable presents a set of recommended guidelines for promoting gender sensitivity in scientific publications. The objective is to provide clear and shareable instructions on conducting gender-sensitive reviews and promoting gender-aware publications. The guidelines aim to foster a more equitable and diverse scientific community by helping to mitigate biases, drive innovation, and address societal challenges by promoting gender equity in research outputs. The deliverable outlines and discusses the conduction of a workshop on gendering scientific publications guidelines, which brought together stakeholders and resulted in recommendations for enhancing the guidelines' effectiveness and impact. The recommendations emphasise cross-functional collaboration, education and training, role models and keynote speakers, accessible communication, and inclusivity in the review process. The report concludes with the next steps, including stakeholder engagement, resource development, implementation strategies, monitoring and evaluation, and dissemination of knowledge. By prioritising these steps, the scientific community can work towards a future of equitable and inclusive scientific publishing that reflects diverse perspectives and experiences.
Editorial
Creators: name: Neves, Pedro Soares
Publisher: name: AIS - Architecture Image Studies
Year: 2022

description: The uncertainties surrounding the future have tended to result in popular narratives that are nihilistic and reductive, if only for dramatic value, and It is clear that alternatives are necessary if we are to make positive sense of the increasingly complex technological opportunities that shape the world around us and the range of possible outcomes that we face. Architectural design and Science Fiction (SF) share an important characteristic, in that they both, conceptually, take place in an imagined future, and potentially ask ‘what-if’ questions about the way we inhabit those futures.
description: AIS - Architecture Image Studies, Vol 2 No 2 (2021): Science Fiction Concept of Change
Visual Notation as a Narrative Development of the Perception of Change
Creators: name: Croft, Michael
Publisher: name: AIS - Architecture Image Studies
Year: 2022

description: The Casa da Musica on Av. da Boavista, Porto, is a commanding iconic building at first sight in its own space. Two roads from the building, tangential to Rotunda da Boavista, is a huge area of cleared land for a new development on the site of the former Boavista Railway Station. On the next tangential road is a café whose customers look across the road towards the exposure of the Casa da Musica to a surprising comparison of the building’s roof incline with the regular urban skyline. The article takes this detail as an instance of the potentiality to be found in casual perceptions that can be encountered in moments of urban change that punctuate a city’s life. The author’s means of visualising such perception is through a form of visual notation. Such notations as the author presents in illustration of his argument employ a transitional mode of visualising that is instructional to the viewer that can communicate the transitory perception of change pertinent to the site under consideration. The visuals were being made as the first draft of the article was being written. Since the article started to suggest a direction for what started as focused recreational activity, the visuals culminate in, and the possibility is posed, of how the Casa… could itself cast a net across and accommodate the void space temporarily opened up by the development site.
description: AIS - Architecture Image Studies, Vol 2 No 2 (2021): Science Fiction Concept of Change
KALAMUSHLARDA ALKOGOLLI NEFROPATIYANING EKSPERIMENTAL MODELI
Creators: name: Hamroev, Izzat
Publisher: name: Zenodo
Year: 2024

description: Maqolada surunkali alkogolizmda buyraklardagi morfometrik va morfologik o'zgarishlar tahlil qilinadi. Etanol bilan zaharlanish buyrakning kapsulasi, qatlamlari va qismlarining morfometrik parametrlarining sezilarli reaktiv o'sishiga olib keladi. Eng katta o'sish 3 oylikda, eng kichiki esa 12 oylikda kuzatiladi. Polaren siropini tuzatish sifatida ishlatish buyrakning morfometrik parametrlariga ijobiy ta'sir ko'rsatadi, bu erda ko'rsatkichlar nazorat guruhiga yaqin.
On $H$-simple not necessarily associative algebras
Creators: name: Gordienko, Alexey
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17A30 (Primary), 16R10, 16R50, 16T05, 17A36, 17A50, 18A40, 20C30 (Secondary)

description: An algebra A with a generalized H-action is a generalization of an H-module algebra where H is just an associative algebra with 1 and a relaxed compatibility condition between the multiplication in A and the H-action on A holds. At first glance this notion may appear too general, however it enables to work with algebras endowed with various kinds of additional structures (e.g. (co)module algebras over Hopf algebras, graded algebras, algebras with an action of a (semi)group by (anti)endomorphisms). This approach proves to be especially fruitful in the theory of polynomial identities. We show that if A is a finite dimensional (not necessarily associative) algebra over a field of characteristic 0 and A is simple with respect to a generalized H-action, then there exists an exponent of the codimension growth of polynomial H-identities of A. In particular, if A is a finite dimensional (not necessarily group graded) graded-simple algebra, then there exists an exponent of the codimension growth of graded polynomial identities of A. In addition, we study the free-forgetful adjunctions corresponding to (not necessarily group) gradings and generalized H-actions.
description: 16 pages. The classification of Lie algebras simple with respect to a Taft algebra action has been moved to arXiv:1705.05809. The sections related to gradings by sets and free-forgetful adjunctions have been added. The misprints found by the referee have been corrected and several clarifications have been made. (To appear in Journal of Algebra and Its Applications.)
Lie algebras simple with respect to a Taft algebra action
Creators: name: Gordienko, Alexey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B40 (Primary), 17B01, 17B05, 17B40, 17B70, 16T05, 20C30 (Secondary)

description: We classify finite dimensional $H_{m^2}(ζ)$-simple $H_{m^2}(ζ)$-module Lie algebras $L$ over an algebraically closed field of characteristic $0$ where $H_{m^2}(ζ)$ is the $m$th Taft algebra. As an application, we show that despite the fact that $L$ can be non-semisimple in ordinary sense, $\lim_{n\to\infty}\sqrt[n]{c_n^{H_{m^2}(ζ)}(L)} = \dim L$ where $c_n^{H_{m^2}(ζ)}(L)$ is the codimension sequence of polynomial $H_{m^2}(ζ)$-identities of $L$. In particular, the analog of Amitsur's conjecture holds for $c_n^{H_{m^2}(ζ)}(L)$.
description: 20 pages. This text was previously a part of arXiv:1508.03764. A gap in the proof has been filled, many misprints have been corrected. (To appear in J.Algebra.)
Black-box optimization on hyper-rectangle using Recursive Modified Pattern Search and application to ROC-based Classification Problem
Creators: name: Das, Priyam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In statistics, it is common to encounter multi-modal and non-smooth likelihood (or objective function) maximization problems, where the parameters have known upper and lower bounds. This paper proposes a novel derivative-free global optimization technique that can be used to solve those problems even when the objective function is not known explicitly or its derivatives are difficult or expensive to obtain. The technique is based on the pattern search algorithm, which has been shown to be effective for black-box optimization problems. The proposed algorithm works by iteratively generating new solutions from the current solution. The new solutions are generated by making movements along the coordinate axes of the constrained sample space. Before making a jump from the current solution to a new solution, the objective function is evaluated at several neighborhood points around the current solution. The best solution point is then chosen based on the objective function values at those points. Parallel threading can be used to make the algorithm more scalable. The performance of the proposed method is evaluated by optimizing up to 5000-dimensional multi-modal benchmark functions. The proposed algorithm is shown to be up to 40 and 368 times faster than genetic algorithm (GA) and simulated annealing (SA), respectively. The proposed method is also used to estimate the optimal biomarker combination from Alzheimer's disease data by maximizing the empirical estimates of the area under the receiver operating characteristic curve (AUC), outperforming the contextual popular alternative, known as step-down algorithm.
Be Selfish and Avoid Dilemmas: Fork After Withholding (FAW) Attacks on Bitcoin
Creators: name: Kwon, Yujin
name: Kim, Dohyun
name: Son, Yunmok
name: Vasserman, Eugene
name: Kim, Yongdae
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In the Bitcoin system, participants are rewarded for solving cryptographic puzzles. In order to receive more consistent rewards over time, some participants organize mining pools and split the rewards from the pool in proportion to each participant's contribution. However, several attacks threaten the ability to participate in pools. The block withholding (BWH) attack makes the pool reward system unfair by letting malicious participants receive unearned wages while only pretending to contribute work. When two pools launch BWH attacks against each other, they encounter the miner's dilemma: in a Nash equilibrium, the revenue of both pools is diminished. In another attack called selfish mining, an attacker can unfairly earn extra rewards by deliberately generating forks. In this paper, we propose a novel attack called a fork after withholding (FAW) attack. FAW is not just another attack. The reward for an FAW attacker is always equal to or greater than that for a BWH attacker, and it is usable up to four times more often per pool than in BWH attack. When considering multiple pools - the current state of the Bitcoin network - the extra reward for an FAW attack is about 56% more than that for a BWH attack. Furthermore, when two pools execute FAW attacks on each other, the miner's dilemma may not hold: under certain circumstances, the larger pool can consistently win. More importantly, an FAW attack, while using intentional forks, does not suffer from practicality issues, unlike selfish mining. We also discuss partial countermeasures against the FAW attack, but finding a cheap and efficient countermeasure remains an open problem. As a result, we expect to see FAW attacks among mining pools.
description: This paper is an extended version of a paper accepted to ACM CCS 2017
title: Reactions with polarized electrons and photons at low momentum transfers at the superconducting Darmstadt electron linear accelerator S–DALINAC
Creators: name: Enders, J.
name: Bahlo, T.
name: Bangert, P.
name: Barday, R.
name: Brunken, M.
name: Eckardt, C.
name: Eichhorn, R.
name: Espig, M.
name: Freudenberger, M.
name: Göök, A.
name: Ingenhaag, C.
name: Lindemann, J.
name: Neumann-Cosel, P. von
name: Oberstedt, A.
name: Oberstedt, S.
name: Poltoratska, Y.
name: Richter, A.
name: Roth, M.
name: Schneider, F.
name: Wagner, M.
name: Weber, A.
name: Zwicker, B.
Publisher: name: IOP Publishing
Year: 2024

description: A source of polarized electrons has been installed at the superconducting Darmstadt electron linear accelerator S-DALINAC. Experiments with polarized electrons from 100 keV to about 80 MeV are expected to commence in early 2011. This contribution summarizes the status of the polarized source as well as ongoing preparations for the experimental program with polarized beams. In particular, we present results on unpolarized test experiments of the, ²³⁴,²³⁸U(γ,f) reactions and considerations for the reactions.
Discrete field theory: symmetries and conservation laws
Creators: name: Skopenkov, Mikhail
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Algebraic Topology (math.AT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 49M25, 49S05, 55N45, 81T25

description: We present a general algorithm constructing a discretization of a classical field theory from a Lagrangian. We prove a new discrete Noether theorem relating symmetries to conservation laws and an energy conservation theorem not based on any symmetry. This gives exact conservation laws for several theories, e.g., lattice electrodynamics and gauge theory. In particular, we construct a conserved discrete energy-momentum tensor, approximating the continuum one at least for free fields. The theory is stated in topological terms, such as coboundary and products of cochains.
description: 46 pages, 10 figures; exposition improved: more detailed comparison to the existing literature added, text reordered to minimize forward references
A review and integration of research on serial arguments
Creators: name: Li, Yuwei
name: Worley, Timothy
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Cancer
subject: Science Policy
subject: Mental Health
subject: Plant Biology
subject: Computational Biology

description: Serial arguments are conflict interactions that recur about the same topic, within the same relationship, and without achieving resolution. A consequential form of interpersonal communication, serial arguments have captured over 30 years of research interest, and the knowledge generated about this phenomenon is robust yet scattered. In this essay, we organize this research landscape by reviewing key findings and identifying unanswered questions related to defining and characterizing serial arguments, intrapersonal and interpersonal processes, and within-episode and between-episode dynamics of serial arguments. We then present a roadmap that synthesizes extant literature and advances an agenda for future research on serial arguments. We conclude with a discussion to highlight opportunities for generating new insights into serial arguments.
How open is communication science? Open-science principles in the field
Creators: name: Haim, Mario
name: Jungblut, Marc
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Science Policy

description: Open-science principles, such as open data, shared materials, and pre-registration, are expected to encourage a culture of replication in scientific research. Yet, with its topical and methodological heterogeneity, communication science has been described to fall short of such principles. We analyze the extent to which open-science principles were used in publications from 20 leading communication journals between 2010 and 2020, and compare the results to benchmarks from psychology. Results show that open-science principles were little used in communication science with some variation across methods, but were more consistently used in psychology papers. There was no relationship with scientific impact. This suggests a need for greater attention to open-science principles in communication science, while considering their appropriateness for different study designs.
Derived equivalence and fibrations over curves and surfaces
Creators: name: Lombardi, Luigi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F05, 14E05

description: We prove that the bounded derived category of coherent sheaves on a smooth projective complex variety reconstructs the isomorphism classes of fibrations onto smooth projective curves of genus $g\geq 2$. Moreover, in dimension at most four, we prove that the same category reconstructs the isomorphism classes of fibrations onto normal projective surfaces with positive holomorphic Euler characteristic and admitting a finite morphism to an abelian variety. Finally, we study the derived invariance of a class of fibrations with minimal base-dimension under the condition that all the Hodge numbers of type $h^{0,p}(X)$ are derived invariant.
description: 18 pages, comments welcome. Final version
title: A Study of the Challenges and Prospects arising from the Privatisation of the Oil Industry in the State of Kuwait
titleType: Other
Creators: name: Al-Hashash, Hanan Musaed
Publisher: name: University of Dundee
Year: 2023

description: The oil industry is one of the most important industrial sectors in the world economy and, for the State of Kuwait, oil has been and continues to be its most precious natural resource. Being a founding member of the Organization of the Petroleum Exporting Countries (OPEC), Kuwait has the 6th largest oil reserves in the world with approximately 101.5 billion barrels per year. The oil industry contributes over a half of Kuwait’s Gross Domestic Product (GDP), and 90% of the country’s export revenues, thus signifying the importance of the oil industry in the State of Kuwait’s integrated socio-economic development in the context of the changing global economy. Though there is abundant literature on the subject of privatisation in Kuwait, this is perhaps the first attempt to address the study of privatisation in a holistic manner, analysing the legal aspects of privatisation laws in the context of oil and gas industry.

The study aims to undertake a systematic analysis of the scenario of privatisation of some of the areas of the oil sector in the State of Kuwait, and thereafter examine the model/s that would be appropriate to uphold the State sovereignty over its natural resources and to achieve the country’s economic development goals through privatisation as envisioned under the Kuwait Vision 2035. In this regard, the study provides a detailed account of the Constitutional provisions and other Kuwaiti Laws and their application to protect the sovereign interests for the Kuwait government and its citizens and the legal provisions relating to the privatisation and public-private partnership (PPP) for the oil industry in the State of Kuwait, and the classification of PPP agreements. The study focuses on the challenges and opportunities facing the oil industry in the State of Kuwait, along with the PPP models, given the context of the 3rd Kuwait National Development Plan (2020-2025).

The study provides a brief account of the challenges to the privatisation of the oil industry in the State of Kuwait. The discussion consists of two main sub-sections viz., legal challenges and other challenges (which include economic, social and political challenges) to the process of privatisation of the oil industry in the State of Kuwait. Further, on analysing the issue and the key aspects of privatisation along with lessons and experiences from various countries, the study proposes some legal and regulatory recommendations for the establishment of a framework for effective privatisation of the oil industry in the State of Kuwait and thereby establishes an agenda for the future.
title: ÐÐ°ÑÑÐ½Ð¾-Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÐ¹ ÑÐµÐ½ÑÑ "ÐÐ¾Ð·Ð¾Ð±Ð½Ð¾Ð²Ð»ÑÐµÐ¼ÑÐµ Ð²Ð¸Ð´Ñ ÑÐ½ÐµÑÐ³Ð¸Ð¸ Ð¸ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð½Ð° Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ðµ"
title: Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ð¸ Ñ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐ¼ ÑÑÐ°ÑÑÐ¸ÐµÐ¼, 2-7 Ð´ÐµÐºÐ°Ð±ÑÑ 2013 Ð³Ð¾Ð´Ð°
titleType: Subtitle
Creators: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½ÑÐ¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ
Publisher: name: ÐÐ·Ð´-Ð²Ð¾ ÐÐ¾Ð»Ð¸ÑÐµÑÐ½. ÑÐ½-ÑÐ°
Year: 2014
Subjects: ÐÐ¾Ð·Ð¾Ð±Ð½Ð¾Ð²Ð»ÑÐµÐ¼ÑÐµ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ¸ ÑÐ½ÐµÑÐ³Ð¸Ð¸

description: Ð ÑÐ±Ð¾ÑÐ½Ð¸ÐºÐµ Ð¿ÑÐ±Ð»Ð¸ÐºÑÑÑÑÑ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ Ð´Ð¾ÐºÐ»Ð°Ð´Ð¾Ð² ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ¾Ð², Ð¼Ð¾Ð»Ð¾Ð´ÑÑ ÑÑÐµÐ½ÑÑ Ð¸ ÑÐ¾ÑÑÑÐ´Ð½Ð¸ÐºÐ¾Ð² ÐÐ¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°, Ð²ÑÐ·Ð¾Ð² Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³Ð°, Ð Ð¾ÑÑÐ¸Ð¸ Ð¸ Ð´ÑÑÐ³Ð¸Ñ ÑÑÑÐ°Ð½, Ð° ÑÐ°ÐºÐ¶Ðµ ÑÑÑÐµÐ¶Ð´ÐµÐ½Ð¸Ð¹ Ð ÐÐ, Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð½ÑÐµ Ð½Ð° Ð½Ð°ÑÑÐ½Ð¾- Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÑÑ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ, Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸Ð¼ÑÑ Ð² ÑÐ°Ð¼ÐºÐ°Ñ ÐµÐ¶ÐµÐ³Ð¾Ð´Ð½Ð¾Ð¹ ÐÐµÐ´ÐµÐ»Ð¸ Ð½Ð°ÑÐºÐ¸ Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°. ÐÐ¾ÐºÐ»Ð°Ð´Ñ Ð¾ÑÑÐ°Ð¶Ð°ÑÑ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÐ¹ ÑÑÐ¾Ð²ÐµÐ½Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÑÐ°ÑÑÐ½Ð¸ÐºÐ¾Ð² ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ð¸ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð³Ð¸Ð´ÑÐ¾ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÑÐ²Ð°, Ð¿ÑÐ¸ÑÐ¾Ð´Ð¾Ð¾Ð±ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°, Ð»Ð°Ð½Ð´ÑÐ°ÑÑÐ½Ð¾Ð¹ Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÑ, ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÑÐ²Ð° Ð¾Ð±ÑÐµÐºÑÐ¾Ð² Ð²Ð¾Ð·Ð¾Ð±Ð½Ð¾Ð²Ð»ÑÐµÐ¼Ð¾Ð¹ ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÐºÐ¸. ÐÑÐµÐ´ÑÑÐ°Ð²Ð»ÑÐµÑ Ð¸Ð½ÑÐµÑÐµÑ Ð´Ð»Ñ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð² Ð² ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð¾Ð±Ð»Ð°ÑÑÑÑ Ð·Ð½Ð°Ð½Ð¸Ð¹, ÑÑÐ°ÑÐ¸ÑÑÑ Ð¸ ÑÐ°Ð±Ð¾ÑÐ½Ð¸ÐºÐ¾Ð² ÑÐ¸ÑÑÐµÐ¼Ñ Ð²ÑÑÑÐµÐ³Ð¾ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð°ÐºÐ°Ð´ÐµÐ¼Ð¸Ð¸ Ð½Ð°ÑÐº.
description: ÐÐµÑÐ°ÑÐ°ÐµÑÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐµÐ´Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾-Ð¸Ð·Ð´Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ ÑÐ¾Ð²ÐµÑÐ° Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°.
Complete positivity and distance-avoiding sets
Creators: name: DeCorte, Evan
name: Filho, Fernando Mário de Oliveira
name: Vallentin, Frank
Publisher: name: arXiv
Year: 2018
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 46N10, 52C10, 51K99, 90C22, 90C34

description: We introduce the cone of completely-positive functions, a subset of the cone of positive-type functions, and use it to fully characterize maximum-density distance-avoiding sets as the optimal solutions of a convex optimization problem. As a consequence of this characterization, it is possible to reprove and improve many results concerning distance-avoiding sets on the sphere and in Euclidean space.
description: 57 pages; final version published at Math. Program
title: Ð Ð°ÑÑÐµÑ Ð½Ð°Ð³ÑÑÐ·Ð¾Ðº Ð½Ð° ÑÐ»ÐµÐ¼ÐµÐ½ÑÑ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ Ð³ÑÐ°Ð²Ð¸ÑÐ°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ð¹ Ð¿ÑÐ¸ Ð¿Ð¾ÑÑÐ°Ð½Ð¾Ð²ÐºÐµ Ð½Ð° Ð¼Ð¾ÑÑÐºÐ¾Ðµ Ð´Ð½Ð¾
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐ»Ð¾ÑÐ¸Ð½Ð°, Ð¢Ð°ÑÑÑÐ½Ð°
name: ÐÐ¸ÑÐ°Ð»ÐµÐ½ÐºÐ¾, ÐÐ²Ð³ÐµÐ½Ð¸Ð¹
name: Ð¨ÑÐ¸Ð½ÐµÐº, ÐÐ°ÑÐ»
Publisher: name: [ÐÐ·Ð´-Ð²Ð¾ Ð¡ÐÐ±ÐÐ¢Ð£]
Year: 1996
Subjects: ÐÐ¸Ð´ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¼Ð¾ÑÑÐºÐ¸Ðµ

description: Ð Ð°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð¿ÑÐ¾ÑÐµÑÑ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð³ÑÐ°Ð²Ð¸ÑÐ°ÑÐ¸Ð¾Ð½Ð½ÑÑ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼ Ð½Ð° Ð¼Ð¾ÑÑÐºÐ¾Ðµ Ð´Ð½Ð¾. ÐÐ¿Ð¸ÑÑÐ²Ð°ÑÑÑÑ Ð²Ð½ÐµÑÐ½Ð¸Ðµ ÑÐ¸Ð»Ñ, Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐ¸Ðµ Ð½Ð° ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ðµ Ð½Ð° ÑÑÐ°Ð´Ð¸Ð¸
ÑÐ¾ÑÐ¼Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¸ Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÑÐµÐ³Ð¾ Ð¿Ð¾Ð³ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð² Ð³ÑÑÐ½Ñ. ÐÐ°ÑÑÑÑ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ Ð¸Ñ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ. ÐÐ¿Ð¸ÑÑÐ²Ð°ÑÑÑÑ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼ Ð¸ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð° ÑÐ°ÑÑÐµÑÐ° Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ, Ð° ÑÐ°ÐºÐ¶Ðµ Ð½Ð°Ð³ÑÑÐ·Ð¾Ðº, Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐ¸Ñ Ð½Ð° ÑÐ»ÐµÐ¼ÐµÐ½ÑÑ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ Ð¿ÑÐ¸
Ð¿Ð¾ÑÑÐ°Ð½Ð¾Ð²ÐºÐµ Ð½Ð° Ð¼Ð¾ÑÑÐºÐ¾Ðµ Ð´Ð½Ð¾. ÐÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð³Ð¸Ð´ÑÐ¾ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ°ÐºÑÐ»ÑÑÐµÑÐ° ÑÐ¿ÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾ÑÑÐ¸ 290400 âÐÐ¸Ð´ÑÐ¾ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñâ.
description: ÐÐµÑÐ°ÑÐ°ÐµÑÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐµÐ´Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾-Ð¸Ð·Ð´Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ ÑÐ¾Ð²ÐµÑÐ° Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°.
Categories and weak equivalences of graded algebras
Creators: name: Gordienko, Alexey
name: Schnabel, Ofir
Publisher: name: arXiv
Year: 2018
Subjects: subject: Rings and Algebras (math.RA)
subject: Category Theory (math.CT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16W50 (Primary), 18A20, 18A30, 18A40, 18D20 (Secondary)

description: When one studies the structure (e.g. graded ideals, graded subspaces, radicals, ...) or graded polynomial identities of graded algebras, the grading group itself does not play an important role, but can be replaced by any other group that realizes the same grading. Here we come to the notion of weak equivalence of gradings: two gradings are weakly equivalent if there exists an isomorphism between the graded algebras that maps each graded component onto a graded component. Each group grading on an algebra can be weakly equivalent to G-gradings for many different groups G, however it turns out that there is one distinguished group among them called the universal group of the grading. In this paper we study categories and functors related to the notion of weak equivalence of gradings. In particular, we introduce an oplax 2-functor that assigns to each grading its support and show that the universal grading group functor has neither left nor right adjoint.
description: 17 pages; a preliminary version of this article was previously a part of arXiv:1704.07170. (To appear in Algebra Colloquium.)
Hessian barrier algorithms for linearly constrained optimization problems
Creators: name: Bomze, Immanuel M.
name: Mertikopoulos, Panayotis
name: Schachinger, Werner
name: Staudigl, Mathias
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: Primary: 90C51, 90C30, secondary: 90C25, 90C26

description: In this paper, we propose an interior-point method for linearly constrained optimization problems (possibly nonconvex). The method - which we call the Hessian barrier algorithm (HBA) - combines a forward Euler discretization of Hessian Riemannian gradient flows with an Armijo backtracking step-size policy. In this way, HBA can be seen as an alternative to mirror descent (MD), and contains as special cases the affine scaling algorithm, regularized Newton processes, and several other iterative solution methods. Our main result is that, modulo a non-degeneracy condition, the algorithm converges to the problem's set of critical points; hence, in the convex case, the algorithm converges globally to the problem's minimum set. In the case of linearly constrained quadratic programs (not necessarily convex), we also show that the method's convergence rate is $\mathcal{O}(1/k^ρ)$ for some $ρ\in(0,1]$ that depends only on the choice of kernel function (i.e., not on the problem's primitives). These theoretical results are validated by numerical experiments in standard non-convex test functions and large-scale traffic assignment problems.
description: 27 pages, 6 figures
Legendrian Large Cables And New Phenomenon For Non-Uniformly Thick Knots
Creators: name: McCullough, Andrew
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We define the notion of a knot type having Legendrian large cables and show that having this property implies that the knot type is not uniformly thick. Moreover, there are solid tori in this knot type that do not thicken to a solid torus with integer sloped boundary torus, and that exhibit new phenomena; specifically, they have virtually overtwisted contact structures. We then show that there exists an infinite family of ribbon knots that have Legendrian large cables. These knots fail to be uniformly thick in several ways not previously seen. We also give a general construction of ribbon knots, and show when they give similar such examples.
description: Minor typos and corrections