cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Using a spectral/hp element method for high-order implicit-LES of bluff automotive geometries
Creators: name: F. F Buscariolo
name: W. Hambli
name: J. Slaughter
name: S. Sherwin
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: The combination of High-order methods and Large-Eddy Simulation (LES) is an ongoing research focus in turbulence due to the attractive dissipation characteristics of high-order methods. Whilst numerically speaking these methodologies are advantageous, their application is inhibited on industrial cases due to the inherent geometric complexities of such problems. Spectral/hp Element (SEM) solvers such as Nektar++, have potential to be bridge the gap between high-order methods and industrial geometric complexity. This study focuses on the intersection of the application of the SEM solver Nektar++ to an automotive geometry as well as the presentation of high-order mean flow characteristics for the SAE Notchback body. Using a 5th order polynomial expansion at ReL = 2.3 × 106 on a curvilinear grid, results are compared with those empirically achieved in other works. Implicit Sub-Grid scale modelling along with a novel Spectral-Vanishing Viscosity (SVV) approach is employed acting as an artificial diffusion operator preventing high-frequency instabilities and spurious oscillations. Suitable qualitative agreement between PIV and CFD methods is obtained, and quantitative agreement is demonstrated on CD with 9% difference. More extensive backlight separation and subsequent bootlid impingement is observed in CFD than presented in the literature. This might be caused due to differing inflow characteristics, resulting in CM and CL variance to experimental values. Along with the mean flow field characteristics, the methodology and the pipeline used to achieve such results and agreement is presented. The use of a wall-conforming unstructured curvilinear grid allows for significantly greater geometric flexibility whilst retaining the advantages of the high-order polynomial expansion.
Additional file 1 of Mice with mutations in Trpm1, a gene in the locus of 15q13.3 microdeletion syndrome, display pronounced hyperactivity and decreased anxiety-like behavior
Creators: name: Tesshu Hori
name: Ikuta, Shohei
name: Hattori, Satoko
name: Takao, Keizo
name: Miyakawa, Tsuyoshi
name: Koike, Chieko
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Figure S1. Behavioral and physiological characteristics of Trpm1−/− mice. (A–E) General health and neurological screen; (A) body weight, (B) body temperature, (C) grip strength, (D) wire hang test, (E) latency to fall in the rotarod test. n = 4 for both genotypes (A–D), n = 23 for both genotypes (E). (F–K) Gait analysis of front and hind paws; (F) stride duration, (G) stance duration, (H) stride length, (I) stance width, (J) step angle, (K) paw angle. n = 24 Trpm1−/−, n = 23 WT. (L, M) Porsolt forced swimming test; (L) distance traveled, and (M) proportion of time spent immobile in each 1-min period. n = 24 for both genotypes. (N) Percentage of time spent immobile in each 1-min period in the tail suspension test. n = 24 for both genotypes. (O) Serum corticosterone was measured at 4 months of age. n = 4 for both genotypes. (P) Social activity averaging 3 days in home cage test. n = 22 Trpm1−/−, n = 21 WT. *P
FINANCIAL EVALUATION OF TILLAGE SYSTEMS FOR MAIZE ON SANDY SOILS IN THE NORTH-WESTERN FREE STATE
Creators: name: Hough, J.
name: Groenewald, J. A.
name: Hough, J.
name: Groenewald, J. A.
Publisher: name: Unknown
Year: 1989
Subjects: Crop Production/Industries
Financial Economics
Land Economics/Use

description: Various tillage systems (including conventional and top-layer practices) were identified and financially analysed by determining income and cost effects of the systems. Net margin analyses provided illuminating rank-order shifts. The rip-on-row methods are the most economic tillage systems in the North-Western Free State. The best three systems (all top-layer systems) performed on average 111 % better than the conventional systems in respect of net margin per R100 of capital invested.
Hidden security threat identification: A reduced order model for the rapid computation of object characterisations
Creators: name: B. A. Wilson
name: P. D. Ledger
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: This work presents computational results of a reduced order model for the rapid calculation of conducting object characterisations as a function of frequency in metal detection. Such characterisations are called their spectral signature. We present a brief description of the eddy-current model and the magnetic polarizability tensor (MPT) used for our object characterisations. The transmission problem required for the computation of the MPT and its discretisation is then described followed by a summary of the reduced order model. As an illustration of the capabilities of the approach for characterising realistic objects, we show MPT spectral signatures of a British £1 coin.
Which Risks get Managed? addressing Climate Effects in the context of evolving Water-Governance Institutions
Creators: name: Conca, Kenneth
Publisher: name: Water Alternatives
Year: 2023
Subjects: classificationCode: 4101
subject: Climate change impacts and adaptation

description: Warnings about climate change invariably stress water-related effects. Such effects are typically framed as both unpredictable and disruptive, and are thus said to create large new risks to the water sector demanding adaptive responses. This article examines how such responses are mediated by, and also compromised by, two dominant trends in the evolution of water governance institutions: (1) the rise of an “integrated” paradigm of water resources management, which has encouraged the development of more complex and interconnected water institutions, and (2) the rapidly changing political economy of water financing and investment. Each of these trends carries its own strong presumptions about what constitutes water-related risk and how such risk is properly managed. The article uses the specific example of large dam projects to illustrate how these ongoing trends in water governance shape and complicate the prospect of managing climate-water risks.
Critical evaluation of common claims in loop quantum cosmology
Creators: name: Bojowald, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A large number of models have been analyzed in loop quantum cosmology, using mainly minisuperspace constructions and perturbations. At the same time, general physics principles from effective field theory and covariance have often been ignored. A consistent introduction of these ingredients requires substantial modifications of existing scenarios. As a consequence, none of the broader claims made mainly by the Ashtekar school --- such as the genericness of bounces with astonishingly semiclassical dynamics, robustness with respect to quantization ambiguities, the realization of covariance, and the relevance of certain technical results for potential observations --- hold up to scrutiny. Several useful lessons for a sustainable version of quantum cosmology can be drawn from this outcome.
description: 32 pages, invited contribution to Special Issue "Quantum Models for Cosmology"
Perspectives on quality mental health care from Brazilian and Cape Verdean outpatients: Implications for effective patient-centered policies and models of care
Creators: name: De Jesus, Maria
name: Earl, Tara R.
Publisher: name: American University
Year: 2023

description: Mental health providers are increasingly coming into contact with large and growing multi-racial/ethnic and immigrant patient populations in the United States. Knowledge of patient perspectives on what constitutes quality mental health care is necessary for these providers. The aim of this study was to identify indicators of quality of mental health care that matter most to two underrepresented immigrant patient groups of Portuguese background: Brazilians and Cape Verdeans. A qualitative design was adopted using focus group discussions. Six focus groups of patients (n=24 Brazilians; n=24 Cape Verdeans) who received outpatient mental health treatment through public safety net clinics in the northeast region of the United States were conducted. The Consensual Qualitative Research analytic method allowed us to identify three quality of care domains: provider performance, aspects of mental health care environment, and effectiveness of mental health care treatment. Provider performance was associated with five categories: relational, communication, linguistic, cultural, and technical competencies. Aspects of mental health care environment were linked to two categories: psychosocial and physical environment. Effectiveness of mental health care treatment was related to two categories: therapeutic relationship and treatment outcomes. Study findings provide useful data for the development of more culturally appropriate and effective patient-centered models and policies in mental health care.
RISK ANALYSIS OF MAIZE CULTIVATION SYSTEMS IN THE NORTH-WESTERN FREE STATE
Creators: name: Hough, J.
name: Groenewald, J. A.
name: Hough, J.
name: Groenewald, J. A.
Publisher: name: Unknown
Year: 1989
Subjects: Crop Production/Industries
Risk and Uncertainty

description: The risks involved in seven different cultivation systems as regards yield, net margins and net margins per R100 of capital invested were analysed and ordered using stochastic dominance (SD). Mulch systems are less risky than the conventional systems. This finding agrees with those of similar overseas studies. First-order and second-order SD produced enough proof of dominance in order to exercise choices. Thirdorder SD did not provide any additional dominance results. Rank shifts between net margins and net margins per R100 of capital invested occurred.
Perspectives on quality mental health care from Brazilian and Cape Verdean outpatients: Implications for effective patient-centered policies and models of care
Creators: name: De Jesus, Maria
name: Earl, Tara R.
Publisher: name: International Journal of Qualitative Studies on Health and Well-Being
Year: 2023
Subjects: classificationCode: 4203
subject: Health services and systems

description: Mental health providers are increasingly coming into contact with large and growing multi-racial/ethnic and immigrant patient populations in the United States. Knowledge of patient perspectives on what constitutes quality mental health care is necessary for these providers. The aim of this study was to identify indicators of quality of mental health care that matter most to two underrepresented immigrant patient groups of Portuguese background: Brazilians and Cape Verdeans. A qualitative design was adopted using focus group discussions. Six focus groups of patients (n=24 Brazilians; n=24 Cape Verdeans) who received outpatient mental health treatment through public safety net clinics in the northeast region of the United States were conducted. The Consensual Qualitative Research analytic method allowed us to identify three quality of care domains: provider performance, aspects of mental health care environment, and effectiveness of mental health care treatment. Provider performance was associated with five categories: relational, communication, linguistic, cultural, and technical competencies. Aspects of mental health care environment were linked to two categories: psychosocial and physical environment. Effectiveness of mental health care treatment was related to two categories: therapeutic relationship and treatment outcomes. Study findings provide useful data for the development of more culturally appropriate and effective patient-centered models and policies in mental health care.
About the Study of the $n$-dimensional Boolean Cube in the Bachelor's Programs in Computer Science
Creators: name: Bakoev, Valentin
Publisher: name: arXiv
Year: 2022
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: G.2.1
subject: 68R01, 97N70

description: Here we present our arguments for a more in-depth study of the Boolean cube, which is one of the most important discrete structures. The article contains a case study that analyses how the Boolean cube has been included and explained in more than 80 different sources. However, organized material on the Boolean cube is lacking. We examine and show why the topic of the Boolean cube deserves to be studied in the course on Discrete Structures -- a basic part of the Computer Science curriculum. The benefits of mastering such knowledge and programming skills are pointed out. A sample lecture on the $n$-dimensional Boolean cube (including selected exercises, their answers, hints or solutions) is developed and discussed. It introduces, generalizes and relates many concepts from different subjects in the area of Discrete Mathematics and outside it. So the lecturers can use the sample lecture when teaching those subjects. In this way, all these concepts become more understandable, applicable and useful to the students. The lecture can be taught in a form of presentation or given to the students for "Online self-learning", in order to write homework, or develop a course project related to the topic, etc. All supporting resources to the lecture are available for free use at \cite{VB_Lect}.
Technological Capabilities of Brazilian Shipbuilding Suppliers
Creators: name: Mendes Primo, Marcos André
name: DuBois, Frank
Publisher: name: Journal of Technology Management & Innovation
Year: 2023
Subjects: classificationCode: 35
subject: Commerce, management, tourism and services

description: Technological capabilities (TC) play a key role in the competitiveness of firms in industrial sectors. Suppliers in emerging economies often acquire technological capabilities by operating and mastering technologies developed by others and then leveraging this learning to develop indigenous technologies. By reviewing research on firm specific technological capabilities, the development of global value chains and industrial clusters in emerging markets we discuss local suppliers’ insertion and upgrading in the supply chains of new large industrial enterprises. Using the Brazilian shipbuilding industry as context, we investigate and develop propositions related to the ability of local suppliers to develop technological capabilities that permit eventual insertion into the local supply chain. This research has applications for managers and policy makers from other emerging market countries seeking to increase local sourcing through development of local suppliers.
Tall wheatgrass (Thinopyrum ponticum (Podp)) in a real farm context, a sustainable perennial alternative to rye (Secale cereale L.) cultivation in marginal lands
Creators: name: Ciria, Carlos S.
name: Sastre, Carlos M.
name: Carrasco, Juan
name: Ciria, Pilar
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: In order to face the expected increasing demand of energy crops without creating conflicts of land occupation sustainability, farmers need to find reliable alternatives in marginal agricultural areas where the production of food hardly ever is economically and environmentally sustainable. The purpose of this work was the study of the viability of the introduction of new non food crops in marginal areas of real farms. This study compares the profit margin and the energy and environmental performance of growing tall wheatgrass, in the marginal area of a rainfed farm versus rye, the annual crop sowed traditionally in the marginal area of the farm. The cited farm owned 300 ha of which about 13 percent was marginal. The methodology was based on the use of the profit margin of the crops as indicator for the economic assessment and Life Cycle Assessment LCA as technique for the energy and the environmental evaluations. Results of the economic analysis showed a slight enhancement of the profit margin for tall wheatgrass 156 Euro ha-1 y-1 compared to rye 145 Euro ha-1 y-1. Environmental LCA was driven by CO2 fixation due to soil organic matter increase and reduced inputs consumption for tall wheatgrass that produced a Global Warming Potential GWP of -1.9 Mg CO2 eq ha-1 y-1 versus 1.6 Mg CO2 eq ha-1 y-1 obtained for rye. Tall wheatgrass cultivation primary energy consumption was less than 40 percent of rye s consumption. According to the results achieved it was concluded that tall wheatgrass is better option than rye from the energy and the environmental point of views and slight better option from the economic view. Considering these results, monetarization of the CO2 eq reductions of tall wheatgrass compared to rye is essential to improve its profit margin and promote the implantation of this new crop in marginal areas of farms.
description: 8 pages, 4 figures, 2 tables
Simple Interactive Image Segmentation using Label Propagation through kNN graphs
Creators: name: Breve, Fabricio Aparecido
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Many interactive image segmentation techniques are based on semi-supervised learning. The user may label some pixels from each object and the SSL algorithm will propagate the labels from the labeled to the unlabeled pixels, finding object boundaries. This paper proposes a new SSL graph-based interactive image segmentation approach, using undirected and unweighted kNN graphs, from which the unlabeled nodes receive contributions from other nodes (either labeled or unlabeled). It is simpler than many other techniques, but it still achieves significant classification accuracy in the image segmentation task. Computer simulations are performed using some real-world images, extracted from the Microsoft GrabCut dataset. The segmentation results show the effectiveness of the proposed approach.
Protocol for generation of high-dimensional entanglement from an array of non-interacting photon emitters
Creators: name: Bell, Thomas J.
name: Bulmer, Jacob F. F.
name: Jones, Alex E.
name: Paesani, Stefano
name: McCutcheon, Dara P. S.
name: Laing, Anthony
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Encoding high-dimensional quantum information into single photons can provide a variety of benefits for quantum technologies, such as improved noise resilience. However, the efficient generation of on-demand, high-dimensional entanglement was thought to be out of reach for current and near-future photonic quantum technologies. We present a protocol for the near-deterministic generation of $N$-photon, $d$-dimensional photonic Greenberger-Horne-Zeilinger (GHZ) states using an array of $d$ non-interacting single-photon emitters. We analyse the impact on performance of common sources of error for quantum emitters, such as photon spectral distinguishability and temporal mismatch, and find they are readily correctable with time-resolved detection to yield high fidelity GHZ states of multiple qudits. When applied to a quantum key distribution scenario, our protocol exhibits improved loss tolerance and key rates when increasing the dimensionality beyond binary encodings.
description: 15 pages, 6 figures
Pattern formation driven by nematic ordering of assembling biopolymers
Creators: name: Ziebert, Falko
name: Zimmermann, Walter
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The biopolymers actin and microtubules are often in an ongoing assembling/disassembling state far from thermal equilibrium. Above a critical density this leads to spatially periodic patterns, as shown by a scaling argument and in terms of a phenomenological continuum model, that meets also Onsager's statistical theory of the nematic--to--isotropic transition in the absence of reaction kinetics. This pattern forming process depends much on nonlinear effects and a common linear stability analysis of the isotropic distribution of the filaments is often misleading. The wave number of the pattern decreases with the assembling/disassembling rate and there is an uncommon discontinuous transition between the nematic and the periodic state.
description: 4 pages, 3 figures
Additional file 2 of Mice with mutations in Trpm1, a gene in the locus of 15q13.3 microdeletion syndrome, display pronounced hyperactivity and decreased anxiety-like behavior
Creators: name: Tesshu Hori
name: Ikuta, Shohei
name: Hattori, Satoko
name: Takao, Keizo
name: Miyakawa, Tsuyoshi
name: Koike, Chieko
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2: Figure S2. Normal biomonoamine levels in the brains (except the cerebellum) of Trpm1−/− mice. Quantification of monoamine neurotransmitters in brain regions except the cerebellum at 4 months old. n = 24 for both genotypes. No significant changes; Student’s t test or Welch’s t test.
Technological Capabilities of Brazilian Shipbuilding Suppliers
Creators: name: Mendes Primo, Marcos André
name: DuBois, Frank
Publisher: name: American University
Year: 2023

description: Technological capabilities (TC) play a key role in the competitiveness of firms in industrial sectors. Suppliers in emerging economies often acquire technological capabilities by operating and mastering technologies developed by others and then leveraging this learning to develop indigenous technologies. By reviewing research on firm specific technological capabilities, the development of global value chains and industrial clusters in emerging markets we discuss local suppliers’ insertion and upgrading in the supply chains of new large industrial enterprises. Using the Brazilian shipbuilding industry as context, we investigate and develop propositions related to the ability of local suppliers to develop technological capabilities that permit eventual insertion into the local supply chain. This research has applications for managers and policy makers from other emerging market countries seeking to increase local sourcing through development of local suppliers.
FACTORS INFLUENCING CROP INSURANCE PARTICIPATION IN MAIZE FARMING
Creators: name: Jarvie, E. M.
name: Nieuwoudt, W. L.
name: Jarvie, E. M.
name: Nieuwoudt, W. L.
Publisher: name: Unknown
Year: 1989
Subjects: Agricultural and Food Policy
Crop Production/Industries
Farm Management

description: Crop insurance has been divided into comprehensive (all-risk) and hail insurance and these have been analysed separately. A discriminant analysis of 82 farmers surveyed in the Highveld Region during July and August 1987 indicates that it is the farmer more exposed to risk, with lower liquidity, greater experience and more debt, who insures comprehensively. The latter producer also tends to have an unfavourable return on assets with a small or non-existent livestock enterprise. With respect to hail insurance, results indicate that it is the older farmer with low gross farm and off-farm income that tends to insure. Further insight into economic forces influencing farmer participation is important as it may aid policy-makers in the adjustment of present and the formation of future policies regarding such risk management strategies as crop insurance.
CONSIDERATION OF THE SUGAR-CANE STUBBLE REPLACEMENT DECISION AT MHLUME, SWAZILAND
Creators: name: Hill, J. N. S.
name: Hill, J. N. S.
Publisher: name: Unknown
Year: 1989
Subjects: Agricultural and Food Policy
Crop Production/Industries

description: The decline in per hectare sugar-cane yields with increasing ratoons at Mhlume led to an investigation into various replant policies. Analysis of field history data from commercial fields identified distinctly different yield decline patterns for different land classes and the influence of fallowing and green manuring was also isolated. Net present value analyses of net benefit streams from yield models derived from these data have indicated the optimum stages (ratoon) at which replanting should occur.
Establishing simple relationship between eigenvector and matrix elements
Creators: name: Pan, Wei
name: Wang, Jing
name: Sun, Deyan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A simple approximate relationship between the ground-state eigenvector and the sum of matrix elements in each row has been established for real symmetric matrices with non-positive off-diagonal elements. Specifically, the $i$-th components of the ground-state eigenvector could be calculated by $(-S_i)^p+c$, where $S_i$ is the sum of elements in the $i$-th row of the matrix with $p$ and $c$ being variational parameters. The simple relationship provides a straightforward method to directly calculate the ground-state eigenvector for a matrix. Our preliminary applications to the Hubbard model and the Ising model in a transverse field show encouraging results.The simple relationship also provide the optimal initial state for other more accurate methods, such as the Lanczos method.
description: 17 pages, 7 figures
Modelling of RC beam-column sub-assemblages under sudden column loss scenario
Creators: name: J. Sio
name: B. A. Izzuddin
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: The design of structures against disproportionate collapse is commonly achieved through structural assessment under a sudden column loss scenario. In this regard, a novel framework has been previously developed at Imperial College London, aiming to improve the accuracy of robustness assessment whilst maintaining a certain level of practicality. To predict the dynamic behaviour under sudden column loss, the framework transforms the nonlinear static response of a structure into a pseudo-static response through principles of energy balance. Furthermore, the response of an entire structure can be obtained based on the assemblage of its individual components. As such, the structural assessment under sudden column loss can be performed, for example, by simply providing the nonlinear static response of a beam-column sub-assemblage (BCSA) extracted from the structure. Complement to the above framework, this paper aims to propose efficient numerical models to predict the nonlinear static response of RC BCSAs under column loss scenarios. The BCSAs are modelled in the nonlinear finite element analysis program ADAPTIC using one-dimensional fibre-beam elements and a combination of joint/link elements. To reproduce the fracture of reinforcement, a uniaxial steel constitutive model is developed, in which a tensile softening branch follows an exponential degrading function. Two approaches are employed to assess the relevance of considering bond-slip. The first approach, which uses conventional fibre-beam elements, is more simplistic, with the inherent assumptions of linear cross-sectional strain distribution and full-bond between reinforcement and concrete. The second approach is more sophisticated since it relies on two separate elements for the modelling of concrete and reinforcement/bond, respectively. Lastly, parametric studies are performed to assess the sensitivity of the predicted nonlinear static response to various model parameters, including the tensile softening rate of reinforcement and the bond strength.
Additional file 3 of Mice with mutations in Trpm1, a gene in the locus of 15q13.3 microdeletion syndrome, display pronounced hyperactivity and decreased anxiety-like behavior
Creators: name: Tesshu Hori
name: Ikuta, Shohei
name: Hattori, Satoko
name: Takao, Keizo
name: Miyakawa, Tsuyoshi
name: Koike, Chieko
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3: Table S1. 15q13.3 microdeletion syndrome and corresponding mutant mice. –: not assessed, n.s.: no significant difference, M: male, F: female, Ref: references.
Chiral quark model spin filtering mechanism and hyperon polarization
Creators: name: Troshin, S. M.
name: Tyurin, N. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The model combined with unitarity and impact parameter picture provides simple mechanism for generation of hyperon polarization in collision of unpolarized hadrons. We concentrate on a particular problem of $Λ$-hyperon polarization and derive its linear $x_F$-dependence as well as its energy and transverse momentum independence at large $p_\perp$ values. Mechanism responsible for the single--spin asymmetries in pion production is also discussed.
description: 8 pages, 3 figures, talk given by S.M. Troshin at the International Workshop on Transverse Polarisation Phenomena in Hard Processes (Transversity 2005) Villa Olmo (Como), 7-10th. September 2005
Towards Fair Recommendation in Two-Sided Platforms
Creators: name: Biswas, Arpita
name: Patro, Gourab K
name: Ganguly, Niloy
name: Gummadi, Krishna P.
name: Chakraborty, Abhijnan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many online platforms today (such as Amazon, Netflix, Spotify, LinkedIn, and AirBnB) can be thought of as two-sided markets with producers and customers of goods and services. Traditionally, recommendation services in these platforms have focused on maximizing customer satisfaction by tailoring the results according to the personalized preferences of individual customers. However, our investigation reinforces the fact that such customer-centric design of these services may lead to unfair distribution of exposure to the producers, which may adversely impact their well-being. On the other hand, a pure producer-centric design might become unfair to the customers. As more and more people are depending on such platforms to earn a living, it is important to ensure fairness to both producers and customers. In this work, by mapping a fair personalized recommendation problem to a constrained version of the problem of fairly allocating indivisible goods, we propose to provide fairness guarantees for both sides. Formally, our proposed {\em FairRec} algorithm guarantees Maxi-Min Share ($\alpha$-MMS) of exposure for the producers, and Envy-Free up to One Item (EF1) fairness for the customers. Extensive evaluations over multiple real-world datasets show the effectiveness of {\em FairRec} in ensuring two-sided fairness while incurring a marginal loss in overall recommendation quality. Finally, we present a modification of FairRec (named as FairRecPlus) that at the cost of additional computation time, improves the recommendation performance for the customers, while maintaining the same fairness guarantees.
description: ACM Transactions on the Web, Volume 16, Issue 2 May 2022, Article no 8. arXiv admin note: substantial text overlap with arXiv:2002.10764
Sex Pots of Ancient Peru : Post-Gender Reflections
Creators: name: Gero, Joan M.
Publisher: name: Publishers of British Archaeological Reports; Archaeopress
Year: 2023
Subjects: classificationCode: 4301
subject: Archaeology
classificationCode: 4401
subject: Anthropology
subject: FOS: Sociology
classificationCode: 4405
subject: Gender studies

description: Description to be added
Exploiting EEG Signals for Eye Motion Tracking
Creators: name: Kovtun, R.
name: Radchenko, S.
name: Netreba, A.
name: Sudakov, O.
name: Natarov, R.
name: Dyka, Z.
name: Kabin, I.
name: Langendörfer, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Human eye tracking devices can help to investigate principles of processing visual information by humans. The attention focus movement during the gaze can be used for behavioural analysis of humans. In this work we describe our experimental system that we designed for synchronous recording of electroencephalographic signals, events of external tests and gaze direction. As external tests we used virtual cognitive tests. We investigated the possibility to exploit electroencephalographic signals for eye motion tracking. Our experimental system is a first step for the designing an automatic eye tracking system and can additionally be used as a laboratory equipment for teaching students.
description: 5 pages
Supplementary Material from Wind drives temporal variation in pollinator visitation in a fragmented tropical forest
Creators: name: Crall, James D.
name: Brokaw, Julia
name: Gagliardi, Susan F.
name: Mendenhall, Chase D.
name: Pierce, Naomi E.
name: Combes, Stacey A.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences

description: One supplementary figure, three supplementary tables, and supplementary text
Work-efficient Batch-incremental Minimum Spanning Trees with Applications to the Sliding Window Model
Creators: name: Anderson, Daniel
name: Blelloch, Guy E.
name: Tangwongsan, Kanat
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Algorithms for dynamically maintaining minimum spanning trees (MSTs) have received much attention in both the parallel and sequential settings. While previous work has given optimal algorithms for dense graphs, all existing parallel batch-dynamic algorithms perform polynomial work per update in the worst case for sparse graphs. In this paper, we present the first work-efficient parallel batch-dynamic algorithm for incremental MST, which can insert $\ell$ edges in $O(\ell \log(1+n/\ell))$ work in expectation and $O(\text{polylog}(n))$ span w.h.p. The key ingredient of our algorithm is an algorithm for constructing a compressed path tree of an edge-weighted tree, which is a smaller tree that contains all pairwise heaviest edges between a given set of marked vertices. Using our batch-incremental MST algorithm, we demonstrate a range of applications that become efficiently solvable in parallel in the sliding-window model, such as graph connectivity, approximate MSTs, testing bipartiteness, $k$-certificates, cycle-freeness, and maintaining sparsifiers.
El acceso a la rendición de cuentas : Voces individuales o colectivas?
Creators: name: Fox, Jonathan
Publisher: name: University of California, Santa Cruz
Year: 2023
Subjects: classificationCode: 44
subject: Human society

description: Este estudio compara ejemplos paradigmáticos de dos tipos de estrategias de rendición de cuentas de carácter social. Cada estrategia es parte integral de un programa de combate a la pobreza de alcance nacional: el Programa Oportunidades, con sus inversiones en capital humano y la red de tiendas comunitarias rurales de Diconsa. En una sociedad en la que, según el Instituto Nacional de Salud Pública, casi 13% de los niños menores de cinco años padece de desnutrición crónica, los programas sociales todavía tienen que mejorar mucho su desempeño e impacto.
El acceso a la rendición de cuentas : Voces individuales o colectivas?
Creators: name: Fox, Jonathan
Publisher: name: American University
Year: 2023

description: Este estudio compara ejemplos paradigmáticos de dos tipos de estrategias de rendición de cuentas de carácter social. Cada estrategia es parte integral de un programa de combate a la pobreza de alcance nacional: el Programa Oportunidades, con sus inversiones en capital humano y la red de tiendas comunitarias rurales de Diconsa. En una sociedad en la que, según el Instituto Nacional de Salud Pública, casi 13% de los niños menores de cinco años padece de desnutrición crónica, los programas sociales todavía tienen que mejorar mucho su desempeño e impacto.
$E_{11}$, SL(32) and Central Charges
Creators: name: West, P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the $E_{11}$ representation that contains the space-time translation generators also contains the rank two and five totally anti-symmetric representations of $A_{10}$. By studying the behaviour of these latter $A_{10}$ representations under SL(32), which we argue is contained in the Cartan involution invariant sub-algebra of $E_{11}$, we find that the rank two and five totally anti-symmetric representations must be identified with the central charges of the eleven dimensional supersymmetry algebra.
description: 12 pages, plain tex, Typos corrected, one reference and three sentences added and equation (3.8) changed
The coset D-branes of SU(n)
Creators: name: Gaberdiel, Matthias R
name: Gannon, Terry
name: Roggenkamp, Daniel
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using a nested coset construction a collection of D-branes that appear to generate all the K-theory charges of string theory on SU(n) are constructed and their charges are determined.
description: 12 pages
El capital social : De la teoría a la práctica el banco mundial en el campo mexicano
Creators: name: Fox, Jonathan
Publisher: name: American University
Year: 2023

description: This work explores various interaction processes among the Mexican state, the World Bank and a series of Mexican social and civil actors, from the perspective of the evolution of six rural development projects financed by the World Bank during the 1990s. The paper documents the institutional dynamics of rural projects that were implemented after WB's socio-environmental reforms that were intended for poverty eradication or categorized as "green" programs. Outcomes reveal that goals were seldom attained, being therefore impossible to promote institutional contexts favorable to social capital's strengthening of peasant and indigenous autonomous organizations. Approaches aimed at promoting social capital should identify obstacles since the very beginning, and transcend or neutralize them in order to foster the "virtuous circles" that generate social capital accumulation.
The spin-boson model with a structured environment: A comparison of approaches
Creators: name: Wilhelm, F. K.
name: Kleff, S.
name: von Delft, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the spin-boson model, the properties of the oscillator bath are fully characterized by the spectral density of oscillators $J(ω)$. We study the case when this function is of Breit-Wigner shape and has a sharp peak at a frequency $Ω$ with width $Γ\llΩ$. We use a number of approaches such as the weak-coupling Bloch-Redfield equation, the non-interacting blip approximation (NIBA) and the flow-equation renormalization scheme. We show, that if $Ω$ is much larger than the qubit energy scales, the dynamics corresponds to an Ohmic spin-boson model with a strongly reduced tunnel splitting. We also show that the direction of the scaling of the tunnel splitting changes sign when the bare splitting crosses $Ω$. We find good agreement between our analytical approximations and numerical results. We illuminate how and why different approaches to the model account for these features and discuss the interpretation of this model in the context of an application to quantum computation and read-out.
description: 19 pages, 9 figures, accepted for publication in Chemical Physics
El capital social : De la teoría a la práctica el banco mundial en el campo mexicano
Creators: name: Fox, Jonathan
Publisher: name: El Colegio de México
Year: 2023
Subjects: classificationCode: 3502
subject: Banking, finance and investment

description: This work explores various interaction processes among the Mexican state, the World Bank and a series of Mexican social and civil actors, from the perspective of the evolution of six rural development projects financed by the World Bank during the 1990s. The paper documents the institutional dynamics of rural projects that were implemented after WB's socio-environmental reforms that were intended for poverty eradication or categorized as "green" programs. Outcomes reveal that goals were seldom attained, being therefore impossible to promote institutional contexts favorable to social capital's strengthening of peasant and indigenous autonomous organizations. Approaches aimed at promoting social capital should identify obstacles since the very beginning, and transcend or neutralize them in order to foster the "virtuous circles" that generate social capital accumulation.
Quantum oscillations and electronic structure in the large-Chern number topological chiral semimetal PtGa
Creators: name: Xu, Sheng
name: Zhou, Liqin
name: Wang, Xiao-Yan
name: Wang, Huan
name: lin, Jun-Fa
name: Zeng, Xiang-Yu
name: Cheng, Peng
name: Weng, Hongming
name: Xia, Tian-Long
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the magnetoresistance(MR), de Haas-van Alphen (dHvA) oscillations and the electronic structures of single crystal PtGa. The large unsaturated MR is observed with the magnetic field B//[111]. Evident dHvA oscillations with B//[001] configuration have been observed, from which twelve fundamental frequencies are extracted and the spin-orbit coupling effect (SOC) induced band splitting is revealed. The light cyclotron effective masses are extracted from the fitting by the thermal damping term of the Lifshitz-Kosevich (LK) formula. Combining with the calculated frequencies from the first-principles calculations, the dHvA frequencies F$_1$/F$_3$ and F$_{11}$/F$_{12}$ are confirmed to originate from the electron pockets at $Γ$ and R, respectively. The first-principles calculations also reveal the existence of spin-3/2 RSW fermion and time-reversal (TR) doubling of the spin-1 excitation at $Γ$ and R with large Chern number $\pm4$ when SOC is included.
description: 5 pages, 4 figures
Additional methods and results from Context-dependent effects of relative temperature extremes on bill morphology in a songbird
Creators: name: LaBarbera, Katie
name: Marsh, Kyle J.
name: Hayes, Kia R. R.
name: Talisin T. Hammond
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Environmental data processing details; testing for multicollinearity; analysis testing Bergmann's Rule
On the structure and mass delivery towards circumplanetary discs
Creators: name: Schulik, Matthäus
name: Johansen, Anders
name: Bitsch, Bertram
name: Lega, Elena
name: Lambrechts, Michiel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Circumplanetary discs (CPDs) form around young gas giants and are thought to be the sites of moon formation as well as an intermediate reservoir of gas that feeds the growth of the gas giant. How the physical properties of such CPDs are affected by the planetary mass and the overall opacity is relatively poorly understood. In order to clarify this, we use the global radiation hydrodynamics code FARGOCA, with a grid structure that allows resolving the planetary gravitational potential sufficiently well for a CPD to form. We then study the gas flows and density/temperature structures that emerge as a function of planet mass, opacity and potential depth. Our results indicate interesting structure formation for Jupiter-mass planets at low opacities, which we subsequently analyse in detail. Using an opacity level that is 100 times lower than that of ISM dust, our Jupiter-mass protoplanet features an envelope that is sufficiently cold for a CPD to form, and a free-fall region separating the CPD and the circumstellar disc emerges. Interestingly, this free-fall region appears to be a result of supersonic erosion of outer envelope material, as opposed to the static structure formation that one would expect at low opacities. Our analysis reveals that the planetary spiral arms seem to pose a significant pressure barrier that needs to be overcome through radiative cooling in order for gas to free-fall onto the CPD. The circulation inside the CPD is near-keplerian and modified by the presence of CPD spiral arms. For high opacities we recover results from the literature, finding an essentially featureless hot envelope. With this work, we demonstrate the first simulation and analysis of a complete detachment process of a protoplanet from its parent disc in a 3D radiation hydrodynamics setting.
description: 19 pages, 18 figures, Accepted to A&A
A model for the spacetime evolution of heavy-ion collisions at RHIC
Creators: name: Renk, Thorsten
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the space-time evolution of ultrarelativistic Au-Au collisions at full RHIC energy using a schematic model of the expansion. Assuming a thermally equilibrated system, we can adjust the essential scale parameters of this model such that the measured transverse momentum spectra and Hanbury-Brown Twiss (HBT) correlation parameters are well described. We find that the experimental data strongly constrain the dynamics of the evolution of the emission source although hadronic observables for the most part reflect the final breakup of the system.
description: 9 pages, 3 figures, submitted to Phys. Rev. C
Breather wave and lump-type solutions of new (3+1)-dimensional Boiti-Leon-Manna-Pempinelli equation in incompressible fluid
Creators: name: Liu, Jian-Guo
name: Wazwaz, Abdul-Majid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Under investigation is a new (3+1)-dimensional Boiti-Leon-Manna-Pempinelli equation. The main results are listed as follows: (i) lump solutions; (ii) Interaction solutions between lump wave and solitary waves; (iii) Interaction solutions between lump wave and periodic waves; (iv) Breather wave solutions. Furthermore, graphical representation of all solutions is studied and 9shown in some 3D- and contour plots.
description: 9 pages, 24 figures