cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Orbital Refinement and Stellar Properties for the HD 9446, HD 43691, and HD 179079 Planetary Systems
Creators: name: Hill, Michelle L.
name: Mocnik, Teo
name: Kane, Stephen R.
name: Henry, Gregory W.
name: Pepper, Joshua
name: Hinkel, Natalie R.
name: Dalba, Paul A.
name: Fulton, Benjamin J.
name: Stassun, Keivan G.
name: Rosenthal, Lee J.
name: Howard, Andrew W.
name: Howell, Steve B.
name: Everett, Mark E.
name: Boyajian, Tabetha S.
name: Fischer, Debra A.
name: Rodriguez, Joseph E.
name: Beatty, Thomas G.
name: James, David J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Transit Ephemeris Refinement and Monitoring Survey (TERMS) is a project which aims to detect transits of intermediate-long period planets by refining orbital parameters of the known radial velocity planets using additional data from ground based telescopes, calculating a revised transit ephemeris for the planet, then monitoring the planet host star during the predicted transit window. Here we present the results from three systems that had high probabilities of transiting planets: HD 9446 b & c, HD 43691 b, & HD 179079 b. We provide new radial velocity (RV) measurements that are then used to improve the orbital solution for the known planets. We search the RV data for indications of additional planets in orbit and find that HD 9446 shows a strong linear trend of 4.8$σ$. Using the newly refined planet orbital solutions, which include a new best-fit solution for the orbital period of HD 9446 c, and an improved transit ephemerides, we found no evidence of transiting planets in the photometry for each system. Transits of HD 9446 b can be ruled out completely and transits HD 9446 c & HD 43691 b can be ruled out for impact parameters up to b = 0.5778 and b = 0.898 respectively due to gaps in the photometry. A transit of HD 179079 b cannot be ruled out however due to the relatively small size of this planet compared to the large star and thus low signal to noise. We determine properties of the three host stars through spectroscopic analysis and find through photometric analysis that HD 9446 exhibits periodic variability.
description: Accepted for publication in The Astronomical Journal. 23 pages, 21 figures
Limiting the dimming of distant type Ia supernovae
Creators: name: Ostman, Linda
name: Mortsell, Edvard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Distant supernovae have been observed to be fainter than what is expected in a matter dominated universe. The most likely explanation is that the universe is dominated by an energy component with negative pressure -- dark energy. However, there are several astrophysical processes that could, in principle, affect the measurements and in order to be able to take advantage of the growing supernova statistics, the control of systematic effects is crucial. We discuss two of these; extinction due to intergalactic grey dust and dimming due to photon-axion oscillations and show how their effect on supernova observations can be constrained using observed quasar colours and spectra. For a wide range of intergalactic dust models, we are able to rule out any dimming larger than 0.2 magnitudes for a type Ia supernova at z=1. The corresponding limit for intergalactic Milky Way type dust is 0.03 mag. For the more speculative model of photons mixing with axions, we find that the effect is independent of photon energy for certain combinations of parameter values and a dimming as large as 0.6 magnitudes cannot be ruled out. These effects can have profound implications for the possibility of constraining dark energy properties using supernova observations.
description: 19 pages, 11 figures Matches version accepted in JCAP. Some corrections due to minor bug in simulations, major conclusions unchanged
Connections between Tsallis' formalisms employing the standard linear average energy and ones employing the normalized $q$-average energy
Creators: name: Wada, T.
name: Scarfone, A. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Tsallis' thermostatistics with the standard linear average energy is revisited by employing $S_{2-q}$, which is the Tsallis entropy with $q$ replaced by $2-q$. We explore the connections among the $S_{2-q}$ approach and the other different versions of Tsallis formalisms. It is shown that the normalized $q$-average energy and the standard linear average energy are related to each other. The relations among the Lagrange multipliers of the different versions are revealed. The relevant Legendre transform structures concerning the Lagrange multipliers associated with the normalization of probability are studied. It is shown that the generalized Massieu potential associated with $S_{2-q}$ and the linear average energy is related to one associated with the normalized Tsallis entropy and the normalized $q$-average energy.
description: 16 pages, no figure, submitted to Physics Letter A
Fragmented Planning and Splintered Urbanism
Creators: name: Rachna Mehra, Pritpal Randhawa And
Publisher: name: Nidān: International Journal for Indian Studies
Year: 2024

description: This paper engages with debates on the transformation of towns near metropolitan cities in India. Through the case study of Ghaziabad, a city located in the eastern periphery of Delhi in Northern India, we examine the interconnections between industrialisation, urbanisation, and planning. Our paper maps the trajectory of urban morphological changes in Ghaziabad and its development from a town to a city in the post-independence period. Our purpose is to historically document the urban transition in the region of Ghaziabad by focusing on the continuous shift in economic activities, the expansion of planned and unplanned areas, and the incessant flow of poor and middle-class migrants to the city. In doing so we argue that though the planning process in Ghaziabad looks congruous from a distance, yet in reality it is fragmented to the core, resulting in dispersed industrialisation and the formation of a mosaic of residential segregation. The paper also discusses how Delhi’s urbanisation and planning interventions have reconfigured the socio-urban changes in Ghaziabad. The growth of an urban agglomeration under the shadow of a metropolitan city, apart from influencing its salient identity, has also hindered its independent growth in comparison to other satellite cities like Faridabad, Gurgaon, and Noida.
description: Nidān: International Journal for Indian Studies, Vol. 8 No. 2 (2023): Nidān: International Journal for Indian Studies
DPW Potentials for Compact Symmetric CMC Surfaces in $\mathbb{S}^3$
Creators: name: Manca, Benedetto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C42, 53C43, 14H60

description: Inspired by the work of Heller [12], we show that there exists a DPW potential for the Lawson surface $ξ_{k-1, l-1}$ from which it is possible to reconstruct the minimal immersion $f: ξ_{k-1, l-1} \to \mathbb{S}^3$ via the DPW method. Moreover, we extend the result to surfaces immersed in the 3-sphere with constant mean curvature which satisfy a certain symmetric condition.
description: 20 pages, to appear in Journal of Geometry and Physics
Non-Abelian evolution systems with conservation laws
Creators: name: Adler, V. E.
name: Sokolov, V. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We find noncommutative analogs for well-known polynomial evolution systems with higher conservation laws and symmetries. The integrability of obtained non-Abelian systems is justified by explicit zero curvature representations with spectral parameter.
description: 21 pages second version: few minor typos corrected
Methods to Recover Unknown Processes in Partial Differential Equations Using Data
Creators: name: Chen, Zhen
name: Wu, Kailiang
name: Xiu, Dongbin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study the problem of identifying unknown processes embedded in time-dependent partial differential equation (PDE) using observational data, with an application to advection-diffusion type PDE. We first conduct theoretical analysis and derive conditions to ensure the solvability of the problem. We then present a set of numerical approaches, including Galerkin type algorithm and collocation type algorithm. Analysis of the algorithms are presented, along with their implementation detail. The Galerkin algorithm is more suitable for practical situations, particularly those with noisy data, as it avoids using derivative/gradient data. Various numerical examples are then presented to demonstrate the performance and properties of the numerical methods.
description: 21 pages, 11 figures
The F diagram in 3 languages
Creators: name: Shaw, Rod
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 200103 International and Development Communication
subject: FOS: Media and communications

description:
 The movement of pathogens from the faeces of a sick person to where they are ingested by somebody else can take many pathways, some direct and some indirect. This diagram illustrates the main pathways.
Comparing Rewinding and Fine-tuning in Neural Network Pruning
Creators: name: Renda, Alex
name: Frankle, Jonathan
name: Carbin, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Many neural network pruning algorithms proceed in three steps: train the network to completion, remove unwanted structure to compress the network, and retrain the remaining structure to recover lost accuracy. The standard retraining technique, fine-tuning, trains the unpruned weights from their final trained values using a small fixed learning rate. In this paper, we compare fine-tuning to alternative retraining techniques. Weight rewinding (as proposed by Frankle et al., (2019)), rewinds unpruned weights to their values from earlier in training and retrains them from there using the original training schedule. Learning rate rewinding (which we propose) trains the unpruned weights from their final values using the same learning rate schedule as weight rewinding. Both rewinding techniques outperform fine-tuning, forming the basis of a network-agnostic pruning algorithm that matches the accuracy and compression ratios of several more network-specific state-of-the-art techniques.
An LDPCC decoding algorithm based on Bowman-Levin approximation --Comparison with BP and CCCP--
Creators: name: Inoue, Masato
name: Komiya, Miho
name: Kabashima, Yoshiyuki
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Belief propagation (BP) and the concave convex procedure (CCCP) are both methods that utilize the Bethe free energy as a cost function and solve information processing tasks. We have developed a new algorithm that also uses the Bethe free energy, but changes the roles of the master variables and the slave variables. This is called the Bowman-Levin (BL) approximation in the domain of statistical physics. When we applied the BL algorithm to decode the Gallager ensemble of short-length regular low-density parity check codes (LDPCC) over an additive white Gaussian noise (AWGN) channel, its average performance was somewhat better than that of either BP or CCCP. This implies that the BL algorithm can also be successfully applied to other problems to which BP or CCCP has already been applied.
description: 2005 IEEE International Symposium on Information Theory
Arabi-Malayalam Disaster Ballads
Creators: name: Shihab Ayappally Kalluvalappil, Ophira Gamliel And
Publisher: name: Nidān: International Journal for Indian Studies
Year: 2024

description: This paper presents three disaster narratives in Arabi-Malayalam Typhoon Ballad (toofaan maala) by Kattilveettil Ahmed Koya (1909), Flood (vellappokkam) by Mundambara Unnimammad (1924), and Flood Ballad (vellappokka maala) by Pulikkottil Haidar (1961). We explore the aestheticized expressions of flood disasters, their impact on landscape and people, and the role of cultural and artistic productions in enhancing community resilience and risk perception. We approach these Arabi-Malayalam disaster ballads as deliberate engagement with the mechanisms of the disaster cycle of preparedness, response, and recovery. Arguing that these compositions constitute vital strategies in cultivating effective response to disasters, we relate them to official and historical records as well as an ethnographic account following the 2018 Kerala floods. We conclude that the tradition of Arabi-Malayalam disaster ballads constitutes an attempt to standardise and aestheticize spontaneous post-disaster narratives that survivors and rescuers tell and retell for sharing their experiences. Our analysis builds on the concept of local and indigenous knowledge systems (LINKS) to argue that such compositions are crucial for producing knowledge on participatory and organised decision-making processes, desirable leadership skills, and collaborative action aimed at survival, relief, and rescue.
description: Nidān: International Journal for Indian Studies, Vol. 8 No. 2 (2023): Nidān: International Journal for Indian Studies
Coupled Electron Ion Monte Carlo Calculations of Atomic Hydrogen
Creators: name: Holzmann, Markus
name: Pierleoni, Carlo
name: Ceperley, David M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a new Monte Carlo method which couples Path Integral for finite temperature protons with Quantum Monte Carlo for ground state electrons, and we apply it to metallic hydrogen for pressures beyond molecular dissociation. This method fills the gap between high temperature electron-proton Path Integral and ground state Diffusion Monte Carlo methods. Our data exhibit more structure and higher melting temperatures of the proton crystal than Car-Parrinello Molecular Dynamics results using LDA. We further discuss the quantum motion of the protons and the zero temperature limit.
Acid-base equilibrium in exhaled breath condensate of grain elevator workers
Creators: name: Do, Ron
Publisher: name: University of British Columbia
Year: 2010

description: Introduction: Workers in the grain industry have been reported to have adverse respiratory symptoms, primarily due to occupational exposure to grain dust. Exhaled breath condensate (EBC) may be a viable method in field studies to sample secretions of the lower airways. It is suggested that these secretions can predict inflammatory responses to inhaled irritants, such as grain dust. Studies have reported that the acid-base equilibrium in EBC varies with the severity o f airway inflammation. The purpose of the present study was to measure EBC pH and ammonium to assess the acid-base equilibrium of the airways in grain elevator workers. Methods: EBC collection was performed using commercially available equipment. Methodological issues pertaining to the collection, storage, and analysis of EBC were evaluated to produce a standard procedure suitable for our laboratory. The field component consisted of sampling EBC from workers employed at terminal elevators in the port of Vancouver. In addition, personal exposure monitoring to inhalable grain dust and endotoxin, completion of a respiratory questionnaire, spirometry and allergy testing were also performed, as part of a larger cross-sectional grain study. Results: 76 workers participated. EBC pH values varied from 4.3 to 8.2 (median: 7.94); ammonium values from 22 to 2384 μM (median: 420.4). Geometric mean dust and endotoxin levels were: 0.9 mg/m3 (GSD: 4.0) and 435 EU/m3 (GSD: 4.9) respectively. pH and ammonium were moderately correlated (1=0.53). Multivariable analysis showed that pH was lower in association with current smoking intensity and obesity, yet higher in current atopics. Lower pH was associated with duration of exposure on the study day before EBC collection and with working in one work area (seed/pellet plant), but not with measured grain dust or endotoxin exposure concentration. Lower ammonium was associated with chronic smoking intensity, duration of exposure on the study day, years of employment in the industry, and working in the seed/pellet plant; but significantly higher in association with grain dust measured on the study day. Conclusion: The collection of EBC is feasible in field studies. EBC pH and ammonium may be useful to measure airway inflammation related to acute and chronic occupational exposures.
S-layer biogenesis studies in Caulobacter crescentus : RsaA anchoring and the localization of the S-layer-associated protease
Creators: name: Ford, Matthew James
Publisher: name: University of British Columbia
Year: 2010

description: Despite the widespread occurrence of bacterial S-layers, little is known about the mechanisms of attachment to the cell surface, especially in the case of Gram-negative organisms. The S-layer of Caulobacter crescentus is composed of a single protein, RsaA. After export, RsaA assembles into a hexagonal crystalline array that covers the bacterium. In this array, some RsaA monomers are directly attached to the cell surface, while others are surface anchored only by interacting to other RsaA monomers. Since truncations (9) and mutations (8) in the RsaA N-terminus result in S-layer shedding into the culture medium, we hypothesized that the N-terminus of RsaA anchors the monomer to the cell surface. However, since disruption of the RsaA N-terminus and disruption of the putative RsaA subunit-subunit interaction domain both result in the same phenotype (S-layer shedding), when a particular mutation results in a shedding phenotype, it is difficult to know whether RsaA anchoring or RsaA subunit-subunit interaction has been perturbed. To tease apart these issues, we have developed an assay where small RsaA fragments are incubated with S-layer-negative cells to assess the ability of the fragments to re-attach. In doing so we found that the RsaA anchoring region lies in the first ~ 225 amino acids, that this RsaA anchoring region requires a smooth lipopolysaccharide molecule found on the outer membrane, and that even minor perturbations within the first ~ 225 amino acids of RsaA cause loss of anchoring. Mutations that lie outside of the RsaA anchoring region but still result in the shedding phenotype are likely disrupting RsaA-RsaA subunit-subunit interactions rather than directly disrupting RsaA anchoring. As a by-product of these anchoring studies, we have recent preliminary data that Sap, an S-layer editing protease, is likely to be an extracellular membrane-bound protease, rather than an intracellular protease as previously proposed. Additionally, we have found that Sap is likely to be secreted to the cell surface via the same Type I secretion transporter that the S-layer protein utilizes.
A Lie algebroid framework for non-holonomic systems
Creators: name: Mestdag, Tom
name: Langerock, Bavo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B66, 53C05, 70G45, 70H03, 70H05

description: In order to obtain a framework in which both non-holonomic mechanical systems and non-holonomic mechanical systems with symmetry can be described, we introduce in this paper the notion of a Lagrangian system on a subbundle of a Lie algebroid.
description: 18 pages
Finding Direct-Collapse Black Holes at Birth
Creators: name: Whalen, Daniel J.
name: Surace, Marco
name: Bernhardt, Carla
name: Zackrisson, Erik
name: Pacucci, Fabio
name: Ziegler, Bodo L.
name: Hirschmann, Michaela
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Direct-collapse black holes (DCBHs) are currently one of the leading contenders for the origins of the first quasars in the universe, over 300 of which have now been found at $z >$ 6. But the birth of a DCBH in an atomically-cooling halo does not by itself guarantee it will become a quasar by $z \sim$ 7, the halo must also be located in cold accretion flows or later merge with a series of other gas-rich halos capable of fueling the BH's rapid growth. Here, we present near infrared luminosities for DCBHs born in cold accretion flows in which they are destined to grow to 10$^9$ M$_{\odot}$ by $z \sim$ 7. Our observables, which are derived from cosmological simulations with radiation hydrodynamics with Enzo, reveal that DCBHs could be found by the James Webb Space Telescope at $z \lesssim$ 20 and strongly-lensed DCBHs might be found in future wide-field surveys by Euclid and the Wide-Field Infrared Space Telescope at $z \lesssim$ 15.
description: 5 pages, 2 figures, accepted by ApJL
Spin Transport in Disordered Two-Dimensional Hopping Systems with Rashba Spin-Orbit Interaction
Creators: name: Beckmann, U.
name: Damker, T.
name: Boettger, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The influence of Rashba spin-orbit interaction on the spin dynamics of a topologically disordered hopping system is studied in this paper. This is a significant generalization of a previous investigation, where an ordered (polaronic) hopping system has been considered instead. It is found, that in the limit, where the Rashba length is large compared to the typical hopping length, the spin dynamics of a disordered system can still be described by the expressions derived for an ordered system, under the provision that one takes into account the frequency dependence of the diffusion constant and the mobility (which are determined by charge transport and are independent of spin). With these results we are able to make explicit the influence of disorder on spin related quantities as, e.g., the spin life-time in hopping systems.
description: 12 pages, 6 figures, some clarifications added
Analysis of the Filipinos’ Interest in Searching Online for Oral Cancer
Creators: name: Junhel Dalanon
name: Renelson Esguerra
name: Diano, Liz Muriel
name: Matsuka, Yoshizo
Publisher: name: figshare
Year: 2020
Subjects: subject: Cancer
subject: 160305 Population Trends and Policies
subject: FOS: Sociology
subject: 80109 Pattern Recognition and Data Mining
subject: FOS: Computer and information sciences
subject: 110599 Dentistry not elsewhere classified
subject: FOS: Clinical medicine
subject: 110502 Dental Therapeutics, Pharmacology and Toxicology
subject: 111712 Health Promotion
subject: FOS: Health sciences
subject: Health Care
subject: 111799 Public Health and Health Services not elsewhere classified
subject: 80702 Health Informatics
subject: FOS: Media and communications
subject: 111711 Health Information Systems (incl. Surveillance)
subject: 111709 Health Care Administration
subject: 111715 Pacific Peoples Health
subject: 160508 Health Policy
subject: FOS: Political science
subject: 119999 Medical and Health Sciences not elsewhere classified
subject: FOS: Other medical sciences
subject: 111717 Primary Health Care

description: Objective: This study analyzed the health-seeking behavior of Filipinos through relative search volume in Google Trends using oral cancer, mouth cancer, tongue cancer, gum cancer, and lip cancer as predetermined search terms. Methods: Comma-separated values files containing relative search volumes of search trends pertaining to oral cancer from 2009 to 2019 were assessed. Brown-Forsythe one-way ANOVA was used to measure differences of oral cancer between years and among months. Repeated measures two-way ANOVA measured differences among the searches for mouth cancer, tongue cancer, gum cancer, and lip cancer through the years. Time series models were fitted and used to forecast search interests. Results: The results revealed that interests in oral cancer were significantly higher in 2019 (43.75±5.5, p<0.05) compared to 2009 (29.0 ± 6.7). In terms of months, searches were higher in February (45.0 ± 6.6) compared to May (24.8 ± 3.4, p=0.015), June (25.3 ± 4.4, p=0.020), and December (26.5 ± 4.0, p=0.038). Search interests for gum cancer and lip cancer remained significantly lower from 2011 to 2019, and tongue cancer from 2016 to 2018 but approximated mouth cancer in 2019. The forecast shows mouth cancer (31.67%), tongue cancer (23.75%), and lip cancer (3.83%) fluctuating through the year, while gum cancer (8%) will remain steady in 2020. Conclusion: Health-seeking behavior through search trends show an increased interest in oral cancer in 2019 and during February. Search interests will fluctuate in 2020, but at the end of the year will decrease for mouth cancer and tongue cancer, will increase for lip cancer, and will remain steady for gum cancer.
Inclusive D^{*+-} Production in p p-bar Collisions with Massive Charm Quarks
Creators: name: Kniehl, B. A.
name: Kramer, G.
name: Schienbein, I.
name: Spiesberger, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We calculate the next-to-leading order cross section for the inclusive production of D^{*+-} mesons in p p-bar collisions as a function of the transverse momentum and the rapidity in two approaches using massive or massless charm quarks. For the inclusive cross section, we derive the massless limit from the massive theory. We find that this limit differs from the genuine massless version with MS-bar factorization by finite corrections. By adjusting subtraction terms, we establish a massive theory with MS-bar subtraction which approaches the massless theory with increasing transverse momentum. With these results and including the contributions due to the charm and anti-charm content of the proton and anti-proton, we calculate the inclusive D^{*+-} cross section in p p-bar collisions using realistic evolved non-perturbative fragmentation functions and compare with recent data from the CDF Collaboration at the Fermilab Tevatron at center-of-mass energy root(S) = 1.96 TeV. We find reasonable, though not perfect, agreement with the measured cross sections.
description: 48 pages, 14 figures
Machine-learning-based sampling method for exploring local energy minima of interstitial species in a crystal
Creators: name: Toyoura, Kazuaki
name: Kanayama, Kansei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An efficient machine-learning-based method combined with a conventional local optimization technique has been proposed for exploring local energy minima of interstitial species in a crystal. In the proposed method, an effective initial point for local optimization is sampled at each iteration from a given feasible set in the search space. The effective initial point is here defined as the grid point that most likely converges to a new local energy minimum by local optimization and/or is located in the vicinity of the boundaries between energy basins. Specifically, every grid point in the feasible set is classified by the predicted label indicating the local energy minimum that the grid point converges to. The classifier is created and updated at every iteration using the already-known information on the local optimizations at the earlier iterations, which is based on the support vector machine (SVM). The SVM classifier uses our original kernel function designed as reflecting the symmetries of both host crystal and interstitial species. The most distant unobserved point on the classification boundaries from the observed points is sampled as the next initial point for local optimization. The proposed method is applied to three model cases, i.e., the six-hump camelback function, a proton in strontium zirconate with the orthorhombic perovskite structure, and a water molecule in lanthanum sulfate with the monoclinic structure, to demonstrate the high performance of the proposed method.
Constraining Van der Waals quintessence by observations
Creators: name: Capozziello, S.
name: Cardone, V. F.
name: Carloni, S.
name: De Martino, S.
name: Falanga, M.
name: Troisi, A.
name: Bruni, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss an alternative approach to quintessence modifying the usual equation of state of the cosmological fluid in order to see if going further than the approximation of perfect fluid allows to better reproduce the available data. We consider a cosmological model comprising only two fluids, namely baryons (modelled as dust) and dark matter with a Van der Waals equation of state. First, the general features of the model are presented and then the evolution of the energy density, the Hubble parameter and the scale factor are determined showing that it is possible to obtain accelerated expansion choosing suitably the model parameters. We use the estimated age of the universe and the data on the dimensionless coordinate distances to Type Ia supernovae and distant radio galaxies to see whether Van der Waals quintessence is viable to explain dark energy and to constrain its parameters.
description: JCAP accepted version; a new section has been added and the matching with the data has been repeated in a different way also evaluating the positions of the peaks in the CMBR anisotropy spectrum; it is now a 24 pages paper with 8 figures
Fish file.xlsx
Creators: name: Zirintunda, Gerald
Publisher: name: figshare
Year: 2020
Subjects: subject: 70401 Aquaculture
subject: FOS: Agriculture, forestry and fisheries

description: An experiment was done in Tororo Uganda to compare the effect of replacing Fish meal (Rastrineobola argetea) with soybean meal as protein sources for Clarias gariepinus brood stock. Three feed treatments were made;A. Having soybeans as the protein ingredient without fish mealB. Having fish meal as the protein ingredient without soybeansC. The control feed (which was the official proven Clarias gariepinus brood stock feed).
The data shows the results of the growth and reproductive indices taken after a month of running the experiment.
Novel magnetic behavior of single crystalline Er2PdSi3
Creators: name: Iyer, K. K.
name: Paulose, P. L.
name: Sampathkumaran, E. V.
name: Frontzek, M.
name: Kreyssig, A.
name: Doerr, M.
name: Loewenhaupt, M.
name: Mazilu, I.
name: Behr, G.
name: Loeser, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the results of ac and dc magnetic susceptibility (chi) and electrical resistivity (rho) measurements on the single crystals of Er2PdSi3, crystallizing in an AlB2-derived hexagonal structure, for two orientations H//[0001] and H//[2 -1 -1 0]. For H//[0001], there are apparently two magnetic transitions as revealed by the ac chi data, one close to 7 K attributable to antiferromagnetic ordering and the other around 2 K. However, for H // [2 -1 -1 0], we observe additional features above 7 K (near 11 and 23 K) in the plot of low-field chi(T); also, there is no corresponding anomaly in the rho(T) plot. In this respect, the magnetic behavior of this compound is novel, particularly while compared with other members of this series. The features in ac chi respond differently to the application of a small dc magnetic field for the two directions. As far as low temperature (T= 1.8 and 5 K) isothermal magnetization (M) behaviour is concerned, it exhibits meta-magnetic-like features around 2 kOe saturating at high fields for the former orientation, whereas for the latter, there is no saturation even at 120 kOe. The sign of paramagnetic Curie temperature is different for these two directions. Thus, there is a strong anisotropy in the magnetic behavior. However, interestingly, the rho(T) plots are found to be essentially isotropic, with the data revealing possible formation of magnetic superzone formation below 7 K.
description: Physica B, in press
Quantum statistics in multiple particle production
Creators: name: Zalewski, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Effects of quantum statistics are clearly seen in the final states of high-energy multiparticle production processes. These effects are being widely used to obtain information about the regions where the final state hadrons are produced. Here we briefly present and discuss the assumptions underlying most of these analyses.
description: Latex 12 pages no figures
Atomistic study of grain-boundary segregation and grain-boundary diffusion in Al-Mg alloys
Creators: name: Koju, R. K.
name: Mishin, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Mg grain boundary (GB) segregation and GB diffusion can impact the processing and properties of Al-Mg alloys. Yet, Mg GB diffusion in Al has not been measured experimentally or predicted by simulations. We apply atomistic computer simulations to predict the amount and the free energy of Mg GB segregation, and the impact of segregation on GB diffusion of both alloy components. At low temperatures, Mg atoms segregated to a tilt GB form clusters with highly anisotropic shapes. Mg diffuses in Al GBs slower than Al itself, and both components diffuse slowly in comparison with Al GB self-diffusion. Thus, Mg segregation significantly reduces the rate of mass transport along GBs in Al-Mg alloys. The reduced atomic mobility can be responsible for the improved stability of the microstructure at elevated temperatures.
Kuchh toh Kar Lenge ‘We will Manage Something’
Creators: name: Parmar, Bhawna
Publisher: name: Nidān: International Journal for Indian Studies
Year: 2024

description: This paper is based on the experiences of students of the Santhali community in a classroom in a village in the Dumka district in the Santhal Pargana region of Jharkhand. I draw attention to the aspirations of Santhali students by emphasising their everyday interactions and negotiations with the state and the education system. While juggling between manual labour and the pressures of early marriage, Santhali students strive to acquire educational capital that promises them symbolic distance from manual labour. The spatial practices of schooling emphasise a ‘decontextualized modernity’, which scholars have noted, deems Adivasis as non-modern and hence in need of reform. The hidden curriculum of the school is Foucauldian, aiming to impose values of mastering self-discipline, and this value becomes central to the relationship Adivasi students have with the education system, embodied by the classroom. This article argues that while the classroom urges Adivasi students to leave their identity outside the school, under the garb of equality, it still others them through pedagogical practices, teacher-student interactions, and a curriculum that defines what is and what is not attainable for them. Employing ethnographic methods, this paper extends Dost and Froerer’s (2021) idea of aage badhna (progress) that education promises but makes ‘almost impossible’, by disallowing Adivasi students the promised social mobility that shapes their aspirations. In its exclusion of the Adivasi identity, the state education thus excludes and fails Adivasi students.
description: Nidān: International Journal for Indian Studies, Vol. 8 No. 2 (2023): Nidān: International Journal for Indian Studies
The Voice of Mithila Mihir
Creators: name: Kamat, Devanand
Publisher: name: Nidān: International Journal for Indian Studies
Year: 2024

description: The demand for a separate Mithila has recently resurfaced. This is however also an older demand that first emerged in the 1940s. Maithil linguistic nationalism in the early decades of the 20th century played an essential role in contributing to the generation of a movement led by Maithil intellectuals, for whom the prestige and heritage of the Maithili language took precedence over all other concerns. To understand this process better, this paper peruses the literature on Mithila, Maithil, and Maithili that underlies the emergence of Maithili nationalism and the demand for a separate state. Many of these books were initially published through Maithili language and literary magazines. For instance, the Mithila Tattva Vimarsha published in 1949 was first released as a series of articles in the Mithila Mihir Magazine between 1912 to 1914. In this paper, I discuss questions of Maithili, Maithil, and Mithila in the way it emerged in the Mithila Mihir. This study, which draws on hitherto unavailable information from official and archival sources, fills a substantial gap in the literature on Mithila, historicizing the movement for the Mithila State in the context of the State Reorganisation Commission (henceforth SRC). This article also seeks to delve into why the demand for a separate Mithila failed. Though it is common to recount success stories of state-formation in the context of post-independence India, explaining why such demands failed, is also equally important.
description: Nidān: International Journal for Indian Studies, Vol. 8 No. 2 (2023): Nidān: International Journal for Indian Studies
Exclusive tensor meson photoproduction
Creators: name: JPAC Collaboration
name: Mathieu, V.
name: Pilloni, A.
name: Albaladejo, M.
name: Bibrzycki, L.
name: Celentano, A.
name: Fernandez-Ramirez, C.
name: Szczepaniak, A. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study tensor meson photoproduction outside of the resonance region, at beam energies of few GeVs. We build a model based on Regge theory that includes the leading vector and axial exchanges. We consider two determinations of the unknown helicity couplings, and fit to the recent a2 photoproduction data from CLAS. Both choices give a similar description of the a2 cross section, but result in different predictions for the parity asymmetries and the f2 photoproduction cross section. We conclude that new measurements of f2 photoproduction in the forward region are needed to pin down the correct production mechanism. We also extend our predictions to the 8.5 GeV beam energy, where current experiments are running.
description: 13 pages, 7 figures, 3 tables. Version accepted for publication on Phys.Rev.D
Genetic diversity and connectivity of Beveridge Reef's marine biodiversity in an Indo-Pacific wide context
Creators: name: Liggins, Libby
name: Martinez, Vanessa Arranz
Publisher: name: figshare
Year: 2020
Subjects: subject: 60302 Biogeography and Phylogeography
subject: FOS: Biological sciences
subject: Genetics
subject: Marine Biology
subject: 60411 Population, Ecological and Evolutionary Genetics

description: This report contributes a genetic diversity survey of representative marine reef species of Beveridge Reef and Niue. Population genetic (mtDNA) sequence data was generated for five species collected from Beveridge Reef and Niue: the surgeonfishes, Acanthurus nigrofuscus, Acanthurus triostegus; the grouper, Cephalopholis argus; the urchin, Echinometra mathaei; and the clam, Tridacna maxima. This data was combined with existing genetic datasets provided by the Diversity of the Indo-Pacific Network (DIPnet, http://diversityindopacific.net/), and available in the publicly accessible Genomic Observatory Metadatabase (GeOMe, www.geome-db.org). The compiled data was analysed to describe the genetic diversity, genetic uniqueness, and genetic distinctiveness of Beveridge Reef relative to Niue and other Indo-Pacific locations. The patterns in genetic diversity, uniqueness, and distinctiveness varied among species, likely owing to their different demographic histories, but there were some general trends. Overall, the genetic data for the five species indicated that populations of Beveridge Reef were no more connected to populations of Niue, than populations of other nearby locations. Beveridge Reef populations were more genetically distinct from populations of Niue, and other sampled populations, than was expected based on patterns of genetic differentiation throughout the sampled ranges of each species. For the majority of species, Beveridge Reef and Niue were a regional centre of genetic diversity. Both locations had higher levels of genetic diversity than the average value found across the sampled ranges for three species (A. nigrofuscus, C. argus and T. maxima). In general, populations of Niue had higher levels of genetic diversity than populations of Beveridge Reef, but the populations of Beveridge Reef had higher levels of unique genetic diversity indicating a lower level of genetic connectivity with neighbouring regions. As a result of this study, Beveridge Reef and Niue are among the best represented locations in the Pacific for genetic diversity research. (This report does not extend recommendations for the conservation prioritisation or management of the surveyed locations. Inquiries regarding the broader context of the study are best directed to the commissioning agency, The Department of Agriculture, Forestry and Fisheries of Niue.)
title: Non-negative matrix factorization
Creators: name: El-Cheschin, Carim
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Independent component analysis
subject: Principal component analysis

description: Non-negative matrix factorization - NMF is a Linear Dimensionality Reduction method, which approximates a high dimensional non-negative data matrix by a multiplica- tion of two low-ranked matrices that preserves the non-negativity of the data. This property has proven to be beneficial as it allows for the approximated data to be interpreted in the same way as the original data. In addition, NMF leads to a part- based representation of the data, which supports easy identification of the essential parts/features. The thesis starts with a short introduction of NMF, which includes a motivation behind the method, a detailed comparison to the well-known Principal Component Analysis and the possible generalizations of the ”standard NMF” problem. This is followed by a chapter presenting an overview of the wide range of NMF algorithms, which are separated into algorithms based on standard nonlinear optimization schemes and so called separable NMF. All algorithms of the first group are based on the two block gradient descent scheme. In contrast, the separable NMF is restricted to a subclass of matrices characterized by a practical geometrical interpretation which is exploited in many separable NMF algorithms. The last theoretical chapter focuses on the description of the key topics that should be considered when applying NMF such as initialization methods, rank estimation and quality measures to compare the performance of the algorithms. The thesis concludes with the analysis of the NMF methods for a spectrometric dataset consisting of TOF-SIMS measurements taken from meteorites. The ability of NMF to separate spectra into two dissimilar spectra with one considered as the background and one as meteorite specific has been analyzed. The obtained results are promising and give reason to believe that NMF is an adequate method for such tasks. In addition, the robustness to noise of NMF methods in the context of spectral data has been tested and finally the task of defining an appropriate factorization rank has been discussed.
Tale of the ‘Twin City’
Creators: name: Chouksey, Isha R.
Publisher: name: Nidān: International Journal for Indian Studies
Year: 2024

description: The study attempts to analyse the applicability of global colonial theories at the grassroots levels through a case study of Nagpur. Nagpur was first the capital of Gond rulers, then the Marathas, and later the administrative headquarters for the Central Provinces in the colonial period. As the second capital of Maharashtra, Nagpur also continues to assert its position in the political realm in the postcolonial period. However, despite its prominence, there is an unusual gap in colonial records about the city. This study aims to fill these gaps and historicizes the formation of urban Nagpur. Categorizing key events in history based on archival sources under the three frameworks of colonial urban development, trade, and public culture, this study consolidates a cogent historical narrative especially by redrawing archival maps between 1818 and 1930 and linking them with important events, to reimagine the trajectory of urbanization. The study attempts to critically analyse spatial components from British governance: the administrative area, the railways, the cantonment, the civil lines, and the ‘buffer space’ to demonstrate how the emergence of a European environment distanced itself from the medieval city as a strategic defence mechanism. This buffer zone underwent transformation; the cordon sanitaire understood as that very component of colonial separation became the centre of trade and industrialization. This introduces the third entity in the development of urban Nagpur: its immigrant elites, and its labour force that complicates this urban form of the ‘twin cities’.
description: Nidān: International Journal for Indian Studies, Vol. 8 No. 2 (2023): Nidān: International Journal for Indian Studies
The gamma-ray emitting microquasar LSI+61303
Creators: name: Massi, M.
name: Ribo', M.
name: Paredes, J. M.
name: Garrington, S. T.
name: Peracaula, M.
name: Marti', J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: LS I +61 303 is one of the most studied X-ray binary systems because of its two peculiarities: On the one hand being the probable counterpart of the variable gamma ray source 2CG 135+01 (Gregory and Taylor 1978; Tavani et al. 1998) and on the other hand being a periodic radio source (Taylor and Gregory 1982). The recent discovery of a radio emitting jet extending ca. 200 AU at both sides of a central core (Massi et al. 2004) in all evidence has shown the occurrence of accretion/ejection processes in this system. However, the radio outbursts do not occur at periastron passage, where the accretion is at its maximum, but several days later. In addition, when the gamma-ray emission of 2CG 135+01 is examined along the orbital phase of LS I +61 303 one sees that this emission seems to peak at periastron passage (Massi 2004). Here in detail we analyse the trend of the gamma-ray data versus orbital phase and discuss the delay between peaks at gamma-rays and in the radio band within the framework of a two-peak accretion/ejection model proposed by Taylor et al. (1992) and further developed by Marti' and Paredes (1995).
description: To be published in the proceedings of the Symposium on High-Energy Gamma-Ray Astronomy, Heidelberg, July 26-30, 2004 (AIP Proceedings Series)