cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decay channels for double extremal black holes in four dimensions
Creators: name: Aspman, Johannes
name: Manschot, Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore decay channels for charged black holes with vanishing temperature in $\mathcal{N}=2$ supersymmetric compactifications of string theory. If not protected by supersymmetry, such extremal black holes are expected to decay as a consequence of the weak gravity conjecture. We concentrate on double extremal, non-supersymmetric black holes for which the values of the scalar fields are constant throughout space-time, and explore decay channels for which decay into BPS and anti-BPS constituents is energetically favorable. We demonstrate the existence of decay channels at tree level for large families of double extremal black holes. For specific charges, we also find stable non-supersymmetric black holes, suggesting recombination of (anti)-supersymmetric constituents to a non-supersymmetric object.
description: 3 figures, v.2: published version
Deformations of holomorphic-Higgs pairs
Creators: name: Ono, Takashi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the deformation of the holomorphic-Higgs pair. The holomorphic-Higgs pair is a pair of a complex manifold and a Higgs bundle over it. We introduce the differential graded Lie algebra (DGLA) which comes from the deformation. We derive the Maurer-Cartan equation which governs the deformation of the holomorphic-Higgs pair, construct the Kuranishi family of it, and prove its local completeness.
description: 25page. Comments are welcome!
Јапански скупови о Србији и српском језику : Токио–Сапоро, 2. и 5. фебруар 2014.
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 2014
Subjects: приказ
Србија
српски језик
Јапан

description: У Токију је 2. фебруара, у просторијама токијског огранка Хокаидо универзитета из Сапороа, одржан међународни скуп младих истраживача (JCAS Workshop for the Next Generation) посвећен мултиетничности и мултијезичности на делу Републике Србије, у АП Војводини. Тема скупа била је: Identity Formation, Dissolution, and Reorganization in Multiethnic Societies: Toward the Establishment of a Vojvodina Area Studies. Организатори су били: Japan Consortium for Area Studies (JCAS), Hokk aido University Global COE Program „Reshaping Japan’s Border Studies” и The Center for Integrated Area Studies (Kyoto University). Скуп се одвијао у две секције, а као коментатори излагања („discussants“) били су укључени универзитетски професори из Јапана, Susumu Nagayo (Waseda Univ.), за прву секцију, и Keiko Mitani (Univ. of Tokyo), за другу.
Rare semileptonic $B\to K^* \ell^+ \ell^- $ decays in RS$_c$ model
Creators: name: Biancofiore, Pietro
name: Colangelo, Pietro
name: De Fazio, Fulvia
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recent LHCb measurements show small discrepancies with respect to the Standard Model (SM) predictions in selected angular distributions of the mode $B^0 \to K^{*0} μ^+ μ^-$. The possibility of explaining such tensions within theories beyond the SM crucially depends on the size of the deviations of the Wilson coefficients of the effective Hamiltonian for this mode, in comparison to their SM values. We analyse this issue in the framework of the Randall Sundrum model with custodial protection (RS$_c$); in our study we also consider the mode with $τ$ leptons in the final state. We discuss the small deviations of RS$_c$ results from SM ones, found scanning the parameter space of the model.
description: RevTex, 18 pages,18 figures. Published version
Exploring the Optimized Value of Each Hyperparameter in Various Gradient Descent Algorithms
Creators: name: Chen, Abel C. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In the recent years, various gradient descent algorithms including the methods of gradient descent, gradient descent with momentum, adaptive gradient (AdaGrad), root-mean-square propagation (RMSProp) and adaptive moment estimation (Adam) have been applied to the parameter optimization of several deep learning models with higher accuracies or lower errors. These optimization algorithms may need to set the values of several hyperparameters which include a learning rate, momentum coefficients, etc. Furthermore, the convergence speed and solution accuracy may be influenced by the values of hyperparameters. Therefore, this study proposes an analytical framework to use mathematical models for analyzing the mean error of each objective function based on various gradient descent algorithms. Moreover, the suitable value of each hyperparameter could be determined by minimizing the mean error. The principles of hyperparameter value setting have been generalized based on analysis results for model optimization. The experimental results show that higher efficiency convergences and lower errors can be obtained by the proposed method.
description: in Chinese language
The prevalence and predictors of female sexual dysfunction. A systematic review and meta-analysis
Creators: name: McCool, Megan E.
name: Zuelke, Andrea
name: Theurich, Melissa
name: Apfelbacher, Christian J.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 610 Medizin

description: Objective To assess the prevalence and predictors of sexual dysfunction (FSD) among general populations of reproductive age women Methods We performed a systematic review of current literature on FSD from January 2000 until July 2014 (protocol registration: CRD42014009526). Observational studies which assessed the prevalence of female sexual dysfunction were sought in relevant databases. The primary outcome of interest was the prevalence of female sexual dysfunction in general populations of women age 49 and below. The secondary outcome was to determine significant predictors of female sexual dysfunction. Publications which reported the prevalence rate for at least one domain of female sexual dysfunction, according to DSM IV, were included. A first-ever meta-analysis was performed which integrated absolute numbers for prevalence rates and a quality score. Results Out of the 9292 results from the literature search, 183 international studies fulfilled all inclusion criteria for the systematic review; of these, 94 studies were included in the meta-analysis. Using a quality-weighted meta-analysis, the prevalence of female sexual dysfunction was estimated to be 23% [95% CI: 11% to 38%]. Significant risk factors of FSD tend to be older age, low education, unemployment, depression, multiparity, chronic illness and menopause. Good physical health, regular exercise, liberal attitudes towards sex, moderate alcohol consumption, sex education and masturbation have been shown to have significant protective effects. Conclusion Since the last systematic review on FSD in 2004, population-based studies on FSD have increased in number and grown more varied in their cultural settings. The estimate of the prevalence of female sexual dysfunction is lower than the frequently cited estimate of 43%. Identifying significant predictors of FSD may aid health professionals in determining at-risk populations.
description: The presentation by Megan McCool has been awarded by the ESSMs Award Committee with the "Prize for the best presentation on Female Sexual Dysfunction (clinical)".
Божо Ћорић : Српскохрватски језик за странце 1
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 1985
Subjects: Божо Ћорић
приказ
уџбеници

description: Приказ уџбеника српскохрватског језика за странце.
description: Приказ књиге: 142. Божо Ћорић : Српскохрватски језик за странце 1, Међународни славистички центар на Филолошком факултету у Београду, Београд 1985, стр. 1–372
7 keV Sterile neutrino dark matter in $U(1)_R-$ lepton number model
Creators: name: Chakraborty, Sabyasachi
name: Ghosh, Dilip Kumar
name: Roy, Sourov
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the phenomenology of a keV sterile neutrino in a supersymmetric model with $U(1)_R-$ lepton number in the light of a very recent observation of an X-ray line signal at around 3.5 keV, detected in the X-ray spectra of Andromeda galaxy and various galaxy clusters including the Perseus galaxy cluster. This model not only provides a small tree level mass to one of the active neutrinos but also renders a suitable warm dark matter candidate in the form of a sterile neutrino with negligible active-sterile mixing. Light neutrino masses and mixing can be explained once one-loop radiative corrections are taken into account. The scalar sector of this model can accommodate a Higgs boson with a mass of $\sim$ 125 GeV. In this model gravitino is the lightest supersymmetric particle (LSP) and we also study the cosmological implications of this light gravitino with mass $\sim \mathcal O$(GeV).
description: V2, minor modifications in the text, references added, published in JHEP
Inertial Frame Dragging and Relative Rotation of ZAMOs in Axistationary Asymptotically Flat Spacetimes
Creators: name: Braeck, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In axistationary asymptotically flat spacetimes zero angular momentum observers (ZAMOs) define an absolute standard of non--rotation locally, as can be verified by the absence of any Sagnac effect for these observers. Nevertheless, we argue that on a global scale the only physically meaningful concept is that of relative rotation. The argument is substantiated by solving Einstein's equations for an approximate thin shell model where we keep a degree of freedom by relaxing the natural assumption of vanishing rotation at asymptotic infinity at the outset of the analysis. The solution reveals that Einstein's equations only determine differences in the rotation rate of ZAMOs, thereby establishing the concept of relative rotation globally. The interpretation of rotation as relative in a global context is inherently linked to the freedom to transform between coordinate systems rotating relative to each other, implying that an arbitrary ZAMO located at any radius may claim to be the one who is non--rotating on a global scale and that the notion of an asymptotic Lorentz frame relative to which one may measure absolute rotation is devoid of any meaning. The concept of rotation in Kerr spacetime is then briefly discussed in the context of this interpretation.
description: 11 pages, 3 figures. This paper is a contribution to the Special Issue of Universe "Entropy, Cosmic Inflation and the Theory of Relativity: In Honour of Prof. {\O}yvind Gr{\o}n"
Integrality relations for polygonal dissections
Creators: name: Abrams, Aaron
name: Pommersheim, Jamie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 52B45, 13B21

description: Given a trapezoid dissected into triangles, the area of any triangle determined by either diagonal of the trapezoid is integral over the ring generated by the areas of the triangles in the dissection. Given a parallelogram dissected into triangles, the area of any one of the triangles of the dissection is integral over the ring generated by the areas of the other triangles. In both cases, the integrality relations are invariant under deformation of the dissection.
 The trapezoid theorem implies and provides a new context for Monsky's Equidissection Theorem that a square cannot be dissected into an odd number of triangles of equal area.
 A corollary of these results is that the area polynomials for parallelograms introduced in previous work have all leading coefficients equal to $\pm 1$.
title: International Planning History Society Proceedings, Vol 11 No 1 (2004): Planning models and the Culture of Cities
title: Planning models and the Culture of Cities
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2018

description: Proceedings of the 11th International Planning History Society Conference
Barcelona, Spain.
July 14-17, 2004
Conference theme: ‘Planning Models and the Culture of Cities’.
Convenors: Javier Monclus and Manuel Guardia.
Considering Currency in Decision Trees in the Context of Big Data
Creators: name: Hristova, Diana
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Decision trees, Currency, Data quality, Big data mining
subject: 330 Wirtschaft

description: In the current age of big data, decision trees are one of the most commonly applied data mining methods. However, for reliable results they require up-to-date input data, which is not always given in reality. We present a two-phase approach based on probability theory for considering currency of stored data in decision trees. Our approach is efficient and thus suitable for big data applications. Moreover, it is independent of the particular decision tree classifier. Finally, it is context-specific since the decision tree structure and supplemental data are taken into account. We demonstrate the benefits of the novel approach by applying it to three datasets. The results show a substantial increase in the classification success rate as opposed to not considering currency. Thus, applying our approach prevents wrong classification and consequently wrong decisions.
Distribución de sedimientos sobre la plataforma continental, frente a la desembocadura de los ríos Coatzacoalcos, Tonala, Veracruz, México /
Creators: name: Ortega Duran, Miriam
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: GC383.5 O78 1990

description: De las 109 muestras de sedimento recolectadas en la plataforma continental adyacente a la desembocadura de los ríos Coatzacoalcos y Tonalá, se cuantificaron 16 variables sedimentarias.
Белешке о етничком идентитету косметских Шиптара
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 2021
Subjects: Срби
Шиптари
порекло
етногенеза
ономастика
лингвистика
идентитет

description: Питање порекла и етничког идентитета шиптарског народа прилично је сложено и наука на њега не пружа јединствен одговор. Различита виђења порекла овог балканског народа крећу се у широком распону претпоставки, од оних о Шиптарима као староседелачком (старобалканском) становништву до оних о њима као релативно касним досељеницима на Балкану.
 Тако, ови ставови иду од претпоставки (нордијске, тј. бечко-берлинске историјске школе) о илирском пореклу Шиптара, односно о томе да потичу од првих илирско-трачких етничких скупина Старог Балкана, до претпоставки о њиховом досељавању с далеког Кавказа, и појављивању на балканској етничкој сцени тек у 11. столећу.
Preschool engineers
Creators: name: Yang, Shuqi
Publisher: name: No Publisher Supplied
Year: 2018

description: Humans are creative artifact and tool makers. The first step in the manufacturing process is the selection of appropriate materials; yet, relatively little is known about children’s understanding of the properties of different materials that make them suitable for creating particular artifacts. In the 3 studies presented here, we asked children from 3 to 5 years old if different kinds of materials can be used to build a bridge for an elephant to walk on. In Study 1, each material was presented individually to one group that was asked to touch it, and another group that was not, before deciding whether it could be used to make a bridge for an elephant to walk on. If so, the elephant could choose the short route across river, if not, the elephant should take the longer route around the forest. 5-year-old children, but not 3- and 4-year-old children, showed an ability to choose the correct route depending on the material in the Touching-Not-Required condition. Study 2 presented children with a simplified version of Study 1; children were asked to choose which of two materials would make a bridge walk-on-able for an elephant. Since the thickness of the material covaried with the rigidity, study 3 controlled the thickness of the pairs presented; children as young as 3 years old could reliably use the relative rigidity of the samples to select the appropriate material. Our findings suggest that a cognitive precursor for artifact-making behaviors emerges in early childhood.
On algebraic and non-algebraic neighborhoods of rational curves
Creators: name: Lvovski, Serge
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that for any $d>0$ there exists an embedding of the Riemann sphere $\mathbb P^1$ in a smooth complex surface, with self-intersection $d$, such that the germ of this embedding cannot be extended to an embedding in an algebraic surface but the field of germs of meromorphic functions along $C$ has transcendence degree $2$ over $\mathbb C$. We give two different constructions of such neighborhoods, either as blowdowns of a neighborhood of the smooth plane conic, or as ramified coverings of a neighborhood of a hyperplane section of a surface of minimal degree. The proofs of non-algebraicity of these neighborhoods are based on a classification, up to isomorphism, of algebraic germs of embeddings of $\mathbb P^1$, which is also obtained in the paper.
description: 16 pages. In version 2 references and new results added. Version 3: statement of Lemma 4.7 corrected, a bibliographical reference added, minor editing
How to Prove the Optimized Values of Hyperparameters for Particle Swarm Optimization?
Creators: name: Chen, Abel C. H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In recent years, several swarm intelligence optimization algorithms have been proposed to be applied for solving a variety of optimization problems. However, the values of several hyperparameters should be determined. For instance, although Particle Swarm Optimization (PSO) has been applied for several applications with higher optimization performance, the weights of inertial velocity, the particle's best known position and the swarm's best known position should be determined. Therefore, this study proposes an analytic framework to analyze the optimized average-fitness-function-value (AFFV) based on mathematical models for a variety of fitness functions. Furthermore, the optimized hyperparameter values could be determined with a lower AFFV for minimum cases. Experimental results show that the hyperparameter values from the proposed method can obtain higher efficiency convergences and lower AFFVs.
description: in Chinese language
Estudio fisicoquímico de quitina y quitosan extraídos del caparazón de la langosta (Panulirus interruptus) /
Creators: name: Castillo Rosales, German
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: QD321 C38 1991

description: Se utilizaron desechos comerciales de caparazón de langosta roja (Panulirus interruptus) para la obtención de quitina y quitosán bajo diferentes condiciones de extracción.
Using Positive Matching Contrastive Loss with Facial Action Units to mitigate bias in Facial Expression Recognition
Creators: name: Suresh, Varsha
name: Ong, Desmond C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Machine learning models automatically learn discriminative features from the data, and are therefore susceptible to learn strongly-correlated biases, such as using protected attributes like gender and race. Most existing bias mitigation approaches aim to explicitly reduce the model's focus on these protected features. In this work, we propose to mitigate bias by explicitly guiding the model's focus towards task-relevant features using domain knowledge, and we hypothesize that this can indirectly reduce the dependence of the model on spurious correlations it learns from the data. We explore bias mitigation in facial expression recognition systems using facial Action Units (AUs) as the task-relevant feature. To this end, we introduce Feature-based Positive Matching Contrastive Loss which learns the distances between the positives of a sample based on the similarity between their corresponding AU embeddings. We compare our approach with representative baselines and show that incorporating task-relevant features via our method can improve model fairness at minimal cost to classification performance.
Metales traza en sedimentos superficiales marinos de la región noroccidental fronteriza México-E. U. A. /
Creators: name: Ortega Lara, Vicente
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: GC380.2.P6 O78 1991

description: La cuenca de California se caracteriza por presentar asentamientos humanos responsables de una emisión importante de contaminates, dentro de esta zona se localiza la región fronteriza México-EUA, región donde se ubica el área de estudio.
Strong-disorder renormalization-group study of the one-dimensional tight-binding model
Creators: name: Mard, Hossein Javan
name: Hoyos, J. A.
name: Miranda, Eduardo
name: Dobrosavljevic, Vladimir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We formulate a strong-disorder renormalization-group (SDRG) approach to study the beta function of the tight-binding model in one dimension with both diagonal and off-diagonal disorder for states at the band center. We show that the SDRG method, when used to compute transport properties, yields exact results since it is identical to the transfer matrix method. The beta function is shown to be universal when only off-diagonal disorder is present even though single-parameter scaling is known to be violated. A different single-parameter scaling theory is formulated for this particular (particle-hole symmetric) case. Upon breaking particle-hole symmetry (by adding diagonal disorder), the beta function is shown to crossover from the universal behavior of the particle-hole symmetric case to the conventional non-universal one in agreement with the two-parameter scaling theory. We finally draw an analogy with the random transverse-field Ising chain in the paramagnetic phase. The particle-hole symmetric case corresponds to the critical point of the quantum Ising model while the generic case corresponds to the Griffiths paramagnetic phase.
description: includes 12 pages, 4 figures
Avalanche contribution to shear modulus of granular materials
Creators: name: Otsuki, Michio
name: Hayakawa, Hisao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Shear modulus of frictionless granular materials near the jamming transition under oscillatory shear is numerically investigated. It is found that the shear modulus $G$ satisfies a scaling law to interpolate between $G \sim (ϕ- ϕ_J)^{1/2}$ and $G \sim γ_0^{-1/2}(ϕ-ϕ_J)$ for a linear spring model of the elastic interaction between contacting grains, where $ϕ$, $ϕ_J$, and $γ_0$ are, respectively, the volume fraction of grains, the fraction at the jamming point, and the amplitude of the oscillatory shear. The linear relation between the shear modulus and $ϕ- ϕ_J$ can be understood by slip avalanches.
description: 10 pages, 14 figures
Пола века једне култне књиге у Срба : П. Ивић, Српски народ и његов језик, СКЗ, Београд, 1971
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 2022
Subjects: српски језик
Павле Ивић
геополитика

description: Време пред појаву књиге Павла Ивића (1924–1999) Српски народ и његов језик, потоњег академика САНУ и најпознатијег српског лингвисте друге половине 20. столећа, обележено је првим јасним назнакама распада СФР Југославије, најбоље представљеним управо на језичком плану.
Gender differences in honesty: Groups versus individuals
Creators: name: Roider, Andreas
name: Mühlheusser, Gerd
name: Wallmeier, Niklas
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: unethical behavior, lying, group decisions, gender effects, experiment
subject: 330 Wirtschaft
subject: C91
subject: C92
subject: J16

description: Extending the die rolling experiment of Fischbacher and Föllmi-Heusi (2013), we compare gender effects with respect to unethical behavior by individuals and by two-person groups. In contrast to individual decisions, gender matters strongly under group decisions. We find more lying in male groups and mixed groups than in female groups.
Chaotic inflation and unitarity problem
Creators: name: Lee, Hyun Min
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a general chaotic inflation model with non-canonical kinetic term, resulting in attractor solutions for the inflation of quadratic or other monomial type. In particular, the form of the kinetic term and the potential is fixed due to the requirement that the inflation model is a quadratic form in the large field values of the inflaton. We show that a large coupling in the non-canonical kinetic term allows for the slow-roll inflation with sub-Planckian field values of the inflaton and the successful predictions of the quadratic or other monomial type chaotic inflation in light of BICEP2 results are maintained in our model. We find that due to the large rescaling of the inflaton field in the vacuum, there is no unitarity problem below the Planck scale.
description: 12 pages, no figures, title changed, version to appear in Eur. Phys. J C
Colecta de germoplasma de especies endémicas y útiles de la región costera de Baja California, México /
Creators: name: Angoa Roman, Maria De Jesus
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: QH77 .M6 A53 1991

description: Un banco de germoplasma es una forma de conservación Ex situ, donde el germoplasma vegetal puede estar representado por partes vegetativas o por semillas.
Risk Neutral Option Pricing With Neither Dynamic Hedging nor Complete Markets
Creators: name: Taleb, Nassim N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: Proof that under simple assumptions, such as constraints of Put-Call Parity, the probability measure for the valuation of a European option has the mean derived from the forward price which can, but does not have to be the risk-neutral one, under any general probability distribution, bypassing the Black-Scholes-Merton dynamic hedging argument, and without the requirement of complete markets and other strong assumptions. We confirm that the heuristics used by traders for centuries are both more robust, more consistent, and more rigorous than held in the economics literature. We also show that options can be priced using infinite variance (finite mean) distributions.
High-payload and self-adaptive robotic hand with 1-degree-of-freedom translation/rotation switching mechanism
Creators: name: Nishimura, Toshihiro
name: Muryoe, Tsubasa
name: Watanabe, Tetsuyou
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This study proposes a novel robotic hand that can achieve self-adaptive grasping and a large payload (over 20 kg) with a single actuator. Accordingly, two novel mechanisms, an actuation system with self-motion switching and a self-adaptive finger with a self-locking mechanism, are installed in a 1-degree-of-freedom robotic hand. The actuation system switches the output motion from translational to rotational according to the applied external load. The finger is bent by inserting a flexible shaft inside it. Its bending posture can conform to the shape of the object owing to the flexible shaft, and the posture is fixed by a self-locking mechanism, which can be released by the rotational motion of the actuation system. This study presents a mechanical analysis of these mechanisms to achieve the desired behavior. The analysis was validated experimentally, and a robotic hand with these mechanisms were evaluated using grasping tests.
Flexible and slim device switching air blowing and suction by a single airflow control
Creators: name: Nojiri, Seita
name: Nishimura, Toshihiro
name: Tadakuma, Kenjiro
name: Watanabe, Tetsuyou
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This study proposes a soft robotic device with a slim and flexible body that switches between air blowing and suction with a single airflow control. Suction is achieved by jet flow entraining surrounding air, and blowing is achieved by blocking and reversing jet flow. The thin and flexible flap gate enables the switching. Air flow is blocked while the gate is closed and passes through while the gate is open. The opening and closing of the flap gate are controlled by the expansion of the inflatable chambers installed near the gate. The extent of expansion is determined by the upstream static pressure. Therefore, the gate can be controlled by the input airflow rate. The dimensions of the flap gate are introduced as a design parameter, and we show that the parameter contributes to the blowing and suction capacities. We also experimentally demonstrate that the proposed device is available for a variable friction system and an end effector for picking up a thin object covered with dust.
Призренско-тимочки дијалекат у савременој балканској геополитици
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 2020
Subjects: балканска геополитика
српски језик
призренско-тимочки дијалекат
Бугарска
Србија

description: Остаје, дакле, питање да ли се разлог за притиске у циљу издвајања „торлачког“ (/ „шопског“) од осталих делова српског дијалекатског комплекса налази у постепеном отварању врата већ традиционалним научно-политичким аспирацијама Бугарске (сада већ и чланице ЕУ, која ће знати и то да искористи), при чему би се овом идиому, бар за почетак, дао наводно неутралан, унеколико посебан јужнословенски лингвистички статус до неког коначног (можда и политичког) решења на овом делу Балкана. А то решење као да се већ сада симболички назначује чињеницом да се почетком овог века „торлачки“ нашао на Унесковој листи „угрожених језика“, у вези с чим се својим примедбама на то пре пар година огласио Институт за српски језик САНУ
Radiation Transfer of Models of Massive Star Formation. III. The Evolutionary Sequence
Creators: name: Zhang, Yichen
name: Tan, Jonathan C.
name: Hosokawa, Takashi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present radiation transfer (RT) simulations of evolutionary sequences of massive protostars forming from massive dense cores in environments of high surface densities. The protostellar evolution is calculated with a detailed multi-zone model, with the accretion rate regulated by feedback from an evolving disk-wind outflow cavity. Disk and envelope evolutions are calculated self-consistently. In this framework, an evolutionary track is determined by three environmental initial conditions: the initial core mass M_c, the mean surface density of the ambient star-forming clump Sigma_cl, and the rotational-to-gravitational energy ratio of the initial core, beta_c. Evolutionary sequences with various M_c, Sigma_cl, beta_c are constructed. We find that in a fiducial model with M_c=60Msun, Sigma_cl=1 g/cm^2 and beta_c=0.02, the final star formation efficiency >~0.43. For each evolutionary track, RT simulations are performed at selected stages, with temperature profiles, SEDs, and images produced. At a given stage the envelope temperature is highly dependent on Sigma_cl, but only weakly dependent on M_c. The SED and MIR images depend sensitively on the evolving outflow cavity, which gradually wides as the protostar grows. The fluxes at ~ 70 microns, where the scatter due to the inclination is minimized, implying that such diagrams can be useful diagnostic tools of evolutionary stages of massive protostars. We discuss how intensity profiles along or perpendicular to the outflow axis are affected by environmental conditions and source evolution.
description: 28 pages, 26 figures. Accepted for publication in ApJ
The Restriction of Efficient Geodesics to the Non-separating Complex of Curves
Creators: name: Hovland, Seth
name: Vinal, Greg
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In the complex of curves of a closed orientable surface of genus $g,$ $\mathcal{C}(S_g),$ a preferred finite set of geodesics between any two vertices, called \emph{efficient geodesics} introduced by Birman, Margalit, and Menasco in \cite{birman_margalit_menasco_2016}. The main tool used to establish the existence of efficient geodesics was a \emph{dot graph}, which recorded the intersection pattern of a reference arc with the simple closed curves associated with a geodesic path. The idea behind the construction was that a geodesic that is not initially efficient contains shapes in its corresponding dot graph.
 These shapes then correspond to surgeries that reduce the intersection with the reference arc. In this paper, we show that the efficient geodesic algorithm is able to be restricted to the non-separating curve complex; the proof of this will involve analysis of the dot graph and its corresponding surgeries. Moreover, we demonstrate that given any geodesic in the complex of curves we may obtain an efficient geodesic whose vertices, with the possible exception of the endpoints, are all nonseparating curves.
description: 17 pages, 18 figures. arXiv admin note: text overlap with arXiv:1408.4133 by other authors
Научни скупови о јужнословенским и балканским језицима, литератури и фолклору
Creators: name: Радић, Првослав
Publisher: name: Zenodo
Year: 2002
Subjects: научни скупови
балкански језици
приказ скупова

description: Последњих година у универзитетским центрима широм света одржано је више научних скупова посвећених јужнословенским и балканским језицима, литератури и фолклору. Они су потврдили да је југоисточна Европа остала у жижи интересовања научника најразличитијих професионалних усмерења. На директан или индиректан начин, у мањој или већој мери, на овим скуповима је заступљена и србистика, било непосредно, у оквиру једног број а тема из ове области, било као вредан ослонац у различитим компаративним и контрастивним истраживањима.
Spin-orbital mechanisms for negative thermal expansion in Ca2RuO$_4$
Creators: name: Brzezicki, Wojciech
name: Forte, Filomena
name: Noce, Canio
name: Cuoco, Mario
name: Oleś, Andrzej M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The phenomenon of negative thermal expansion (NTE) deals with the increase of the lattice parameters and the volume of the unit cell when the material is thermally cooled. The NTE is typically associated with thermal phonons and anomalous spin-lattice coupling at low temperatures. However, the underlying mechanisms in the presence of strong electron correlations in multi-orbital systems are not yet fully established. Here, we investigate the role of Coulomb interaction in the presence of lattice distortions in setting out the NTE effect, by focusing on the physical case of layered Ca$_2$RuO$_4$ with $d^4$ configuration at each Ru ion site. We employ the Slater-Koster parametrization to describe the electron-lattice coupling through the dependence of the $d-p$ hybridization on the Ru-O-Ru bond angle. The evaluation of the minimum of the free energy at finite temperature by fully solving the multi-orbital many-body problem on finite size cluster allows us to identify the regime for which the system is prone to exhibit NTE effects. The analysis shows that the nature of the spin-orbital correlations is relevant to drive the reduction of the bond angle by cooling, and in turn the tendency toward a NTE. This is confirmed by the fact that a changeover of the electronic and orbital configuration from $d^4$ to $d^3$ by transition metal substitution is shown to favor the occurrence of NTE in Ca$_2$RuO$_4$. This finding is in agreement with the experimental observations of a NTE effect which is significantly dependent on the transition metal substitution in the Ca$_2$RuO$_4$ compound.
description: 20 pages, 14 figures, published in Physical Review B
Tate Objects in Exact Categories (with appendix by Jan \vS\vtov\'ı\vcek and Jan Trlifaj)
Creators: name: Braunling, Oliver
name: Groechenig, Michael
name: Wolfson, Jesse
Publisher: name: arXiv
Year: 2014
Subjects: subject: K-Theory and Homology (math.KT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 18E10 (Primary), 11R56, 13C60 (Secondary)

description: We study elementary Tate objects in an exact category. We characterize the category of elementary Tate objects as the smallest sub-category of admissible Ind-Pro objects which contains the categories of admissible Ind-objects and admissible Pro-objects, and which is closed under extensions. We compare Beilinson's approach to Tate modules to Drinfeld's. We establish several properties of the Sato Grassmannian of an elementary Tate object in an idempotent complete exact category (e.g. it is a directed poset). We conclude with a brief treatment of n-Tate modules and n-dimensional adèles. An appendix due to J. \vS\vtov\'ı\vcek and J. Trlifaj identifies the category of flat Mittag-Leffler modules with the idempotent completion of the category of admissible Ind-objects in the category of finitely generated projective modules.
description: 67 pages, with appendix by Jan \vS\vtov\'\i\vcek and Jan Trlifaj
Contributing to Accessibility Datasets: Reflections on Sharing Study Data by Blind People
Creators: name: Kamikubo, Rie
name: Lee, Kyungjun
name: Kacorri, Hernisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: To ensure that AI-infused systems work for disabled people, we need to bring accessibility datasets sourced from this community in the development lifecycle. However, there are many ethical and privacy concerns limiting greater data inclusion, making such datasets not readily available. We present a pair of studies where 13 blind participants engage in data capturing activities and reflect with and without probing on various factors that influence their decision to share their data via an AI dataset. We see how different factors influence blind participants' willingness to share study data as they assess risk-benefit tradeoffs. The majority support sharing of their data to improve technology but also express concerns over commercial use, associated metadata, and the lack of transparency about the impact of their data. These insights have implications for the development of responsible practices for stewarding accessibility datasets, and can contribute to broader discussions in this area.
description: Preprint, ACM CHI Conference on Human Factors in Computing Systems (CHI 2023)
A Parallel Task-based Approach to Linear Algebra
Creators: name: Tousimojarad, Ashkan
name: Vanderbauwhede, Wim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Processors with large numbers of cores are becoming commonplace. In order to take advantage of the available resources in these systems, the programming paradigm has to move towards increased parallelism. However, increasing the level of concurrency in the program does not necessarily lead to better performance. Parallel programming models have to provide flexible ways of defining parallel tasks and at the same time, efficiently managing the created tasks. OpenMP is a widely accepted programming model for shared-memory architectures. In this paper we highlight some of the drawbacks in the OpenMP tasking approach, and propose an alternative model based on the Glasgow Parallel Reduction Machine (GPRM) programming framework. As the main focus of this study, we deploy our model to solve a fundamental linear algebra problem, LU factorisation of sparse matrices. We have used the SparseLU benchmark from the BOTS benchmark suite, and compared the results obtained from our model to those of the OpenMP tasking approach. The TILEPro64 system has been used to run the experiments. The results are very promising, not only because of the performance improvement for this particular problem, but also because they verify the task management efficiency, stability, and flexibility of our model, which can be applied to solve problems in future many-core systems.
description: Final version as appeared in "dx.doi.org/10.1109/ISPDC.2014.11"
Entropy- and Flow- Induced Superfluid States
Creators: name: Carlstrom, J.
name: Babaev, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Normally the role of phase fluctuations in superfluids and superconductors is to drive a phase transition to the normal state. This happens due to proliferation of topologically nontrivial phase fluctuations in the form of vortices. Here we discuss a class of systems where, by contrast, nontopological phase fluctuations can produce superfluidity. Here we understand superfluidity as a phenomenon that does not necessarily arises from a broken $U(1)$ symmetry, but can be associated with a certain class of (approximate or exact) degeneracies of the systems energy landscape giving raise to a $U(1)$-like phase.
description: 5 pages and 2 figures
Aplicación del control de calidad en el proceso de langosta cocida congelada Panulirus interruptus durante las temporadas 1988-1989 y 1989-1990, en la planta procesadora de la Sociedad Cooperativa Pescadores Nacionales de Abulón /
Creators: name: Irra Beltran, Sayuri
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: SH336.5 .L6 I77 1991

description: Se evaluó el contenido demesófilos aerobios en placa, coliformes totales y fecales, estafilococos, trimetilamina y características sensoriales en 69 corridas de langosta cocida-congelada, procedentes de Planta Procesadora de la Sociedad Cooperativa de Producción Pesquera "Pescadores Nacionales de Abulón".
Efecto combinado de la densidad larval y ración alimenticia /
Creators: name: Gutierrez Garcia, Alexandra
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: SH373 G88 1991

description: Se analizó el efecto combinado de las variables densidad larval y ración alimenticia sobre el crecimiento y sobrevivencia de la almeja Chione cortezi durante 26 días.
Work with AI and Work for AI: Autonomous Vehicle Safety Drivers' Lived Experiences
Creators: name: Chu, Mengdi
name: Zong, Keyu
name: Shu, Xin
name: Gong, Jiangtao
name: Lu, Zicong
name: Guo, Kaimin
name: Dai, Xinyi
name: Zhou, Guyue
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: J.4

description: The development of Autonomous Vehicle (AV) has created a novel job, the safety driver, recruited from experienced drivers to supervise and operate AV in numerous driving missions. Safety drivers usually work with non-perfect AV in high-risk real-world traffic environments for road testing tasks. However, this group of workers is under-explored in the HCI community. To fill this gap, we conducted semi-structured interviews with 26 safety drivers. Our results present how safety drivers cope with defective algorithms and shape and calibrate their perceptions while working with AV. We found that, as front-line workers, safety drivers are forced to take risks accumulated from the AV industry upstream and are also confronting restricted self-development in working for AV development. We contribute the first empirical evidence of the lived experience of safety drivers, the first passengers in the development of AV, and also the grassroots workers for AV, which can shed light on future human-AI interaction research.
description: 17 pages, 2 figures
Supplementary Material for Computationally efficient framework for diagnosing, understanding, and predicting biphasic population growth
Creators: name: Murphy, Ryan J.
name: Maclaren, Oliver J.
name: Calabrese, Alivia R.
name: Thomas, Patrick B.
name: Warne, David J.
name: Williams, Elizabeth D.
name: Simpson, Matthew J.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: 60114 Systems Biology
subject: FOS: Biological sciences
subject: Computational Biology
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Synthetic data results. Additional results for coral reef, cell proliferation assay, and spheroid case studies. Results for fourth case study, a proliferation assay with a bladder cancer cell line. Image processing details.
Vera Bojić, Wolf Oschlies, Lehrbuch der mazedonischen Sprache
Creators: name: Радић, Првослав
name: Мајер, Рудолф
Publisher: name: Zenodo
Year: 1986
Subjects: Македонски књижевни језик
граматике
славистика
приказ

description: Четрдесетогодишаица македонског кшижевног jезика обележена jе
 u славистичком свету у Немачкоj вредним приручником македонског
 jезика коjи jе изашао у оквиру познате едиcije Slavistische Beitrage
 издавачке куће Verlag Otto Sagner из Минхена. Аутори Вера Бојић и
 Волф Ошлис, познаваоци македонског језика и македонистичке науке,
 прихватили су се тешке обавезе да издају прву граматику, односно приручник македонског језика за немачко говорно подруге. Приручник
 је намењен свима онима који желе упознати структуру и савладати основе македонског књижевног језика, „најстаријег и најмлађег" словенског књижевног језика — а пре свега студентима—славистима у оквиру бројних лектората македонског језика у иностранству.
description: Приказ књиге: VERA BOJIC, WOLF OSCHLIES, Lehrbuch der mazedonischen Sprache, Slavistische Beitrige, Band 175, Verlag Otto Sagner, Miinchen 1984, crp. 1—186.