cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring Supplier-Manufacturer Relationships in the Specialty Food Sector
Creators: name: Hardesty, Shermain
name: King, Robert P.
name: Feenstra, Gail
name: Houston, Laurie
name: Joannides, Jan
name: Lev, Larry
name: Hardesty, Shermain
name: King, Robert P.
name: Feenstra, Gail
name: Houston, Laurie
name: Joannides, Jan
name: Lev, Larry
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: small and medium-sized farms
subject: supplier-manufacturer relationships
subject: specialty food industry
subject: specialty food manufacturers
subject: value-added products

description: We use results from a survey of specialty food manufacturers to examine how supplier– manufacturer relationships vary in the specialty food sector. While diverse mechanisms govern relationships between manufacturers and suppliers, relational contracts (longstanding, informal commitments) are the most common governance structure in our sample overall, particularly for medium-sized manufacturers. Vertical integration with the principal supplier is most common for smaller manufacturers, who also are most likely to use open market purchases. The largest manufacturers are significantly more likely to use formal contracts. Nearly half of manufacturers in our sample, regardless of their size, purchase directly from farms.
Mesoxaea (Heteroxaea) vagans
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Mesoxaea
Mesoxaea vagans

description: Mesoxaea (Heteroxaea) vagans (Fox, 1894)
Endemic
[Lectotype: CASC; ♂ west side of El Taste, Baja California Sur, Mexico; September 1983?]
Mesoxaea vagans is endemic to the southern region of the BCP and has been reported multiple times in the Sarcocaulescent Shrubland, Magdalena Plains, and the southern Gulf Coast (Hurd & Linsley 1976). We examined 22 specimens collected in the Gulf Coast (5 ♂, 1 ♀ CASC; 1 ♂, 1 ♀ BBSL), Sarcocaulescent Shrubland (3 ♂, 1 ♀ CASC; 4 ♂ BBSL), and in the Vizcaíno Desert (4 ♂, 2 ♀ CASC), expanding the known distribution of this species. Additionally, the CARCIB team collected this species in the Gulf Coast (1 ♂) and Magdalena Plains (1 ♀) in April 2017, and in Sarcocaulescent Shrubland in September (6 ♂, 1 ♀), October (1 ♂), November (3 ♂) 2016, and April (1 ♀), and November (1 ♀) 2017. Voucher specimens are in the ASUHIC, BBSL, CASC, LACM, and CARCIB. See fig. 23.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 68, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
Linear predictor on linearly-generated data with missing values: non consistency and solutions
Creators: name: Morvan, Marine Le
name: Prost, Nicolas
name: Josse, Julie
name: Scornet, Erwan
name: Varoquaux, Gaël
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We consider building predictors when the data have missing values. We study the seemingly-simple case where the target to predict is a linear function of the fully-observed data and we show that, in the presence of missing values, the optimal predictor may not be linear. In the particular Gaussian case, it can be written as a linear function of multiway interactions between the observed data and the various missing-value indicators. Due to its intrinsic complexity, we study a simple approximation and prove generalization bounds with finite samples, highlighting regimes for which each method performs best. We then show that multilayer perceptrons with ReLU activation functions can be consistent, and can explore good trade-offs between the true model and approximations. Our study highlights the interesting family of models that are beneficial to fit with missing values depending on the amount of data available.
Higher-order interference between multiple quantum particles interacting nonlinearly
Creators: name: Rozema, Lee A.
name: Zhuo, Zhao
name: Paterek, Tomasz
name: Dakić, Borivoje
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The double-slit experiment is the most direct demonstration of interference between individual quantum objects. Since similar experiments with single particles and more slits produce interference fringes reducible to a combination of double-slit patterns it is usually argued that quantum interference occurs between pairs of trajectories, compactly denoted as second-order interference. Here we show that quantum mechanics in fact allows for interference of arbitrarily high order. This occurs naturally when one considers multiple quantum objects interacting in the presence of a nonlinearity, both of which are required to observe higher-order interference. We make this clear by treating a generalised multi-slit interferometer using second-quantisation. We then present explicit experimentally-relevant examples both with photons interacting in nonlinear media and an interfering Bose-Einstein condensate with particle-particle interactions. These examples are all perfectly described by quantum theory, and yet exhibit higher-order interference based on multiple particles interacting nonlinearly.
description: 7 pages, 3 figures
Impact of longitudinal bulk viscous effects to heavy quark transport in a strongly magnetized hot QCD medium
Creators: name: Kurian, Manu
name: Chandra, Vinod
name: Das, Santosh K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The effects of longitudinal bulk viscous pressure on the heavy quark dynamics have been estimated in a strongly magnetized quark-gluon plasma within the Fokker-Planck approach. The bulk viscous modification to the momentum distribution of bulk degrees of freedom has been obtained in the presence of a magnetic field while incorporating the realistic equation of state of the hot magnetized QCD medium. As the magnetic field breaks the isotropy of the medium, the analysis is done along the directions longitudinal and transverse to the field. The longitudinal bulk viscous contribution is seen to have sizable effects in the heavy quark momentum diffusion in the magnetized medium. The dependence of higher Landau levels and the equation of state on the viscous correction to the heavy quark transport has been explored in the analysis.
description: 8 pages, 3 figures, Two column, Version accepted for publication in Physical Review D
Protoxaea gloriosa
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy

description: Protoxaea gloriosa (Fox, 1893)
[Holotype: ANSP; ♀ Las Cruces, New Mexico, US; August 21]
Protoxaea gloriosa is widely distributed in northern Mexico. Ayala et al. (1996), reported this species in both BC and BCS. We examined one female collected in the Gulf Coast in Canipolé in October 1941, BCS (CASC). See fig. 23.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 69, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
Gravitational hedgehog, stringy hedgehog and stringy sphere
Creators: name: Delice, Ozgur
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the solutions of Einstein equations such that a hedgehog solution is matched to different exterior or interior solutions via a spherical shell. In the case where both the exterior and the interior regions are hedgehog solutions or one of them is flat, the resulting spherical shell becomes a stringy shell. We also consider more general matchings and see that in this case the shell deviates from its stringy character.
description: 11 pages
Aid, privatization, and development: Turkey, 1979-1990
Creators: name: Shaker, Sallama Mahmoud
Publisher: name: American University
Year: 2023

description: The research is an analytical study of the ideological, political, and socio-economic aspects of the privatization process in a rent-seeking setting, which explains the problems facing political leaders in developing countries in making the transition from a planned to a market economy. The dissertation defines the terms aid, development, and privatization in a contextual manner to illustrate the difference between the donors' perceptions of these terms and that of the recipients, which explains the problems occurring between them. These contextual definitions become effective throughout the study that seeks to emphasize some of the macro-economic and sociological concerns that determine decision-making during and after crisis. The research extends the rent-seeking theory as studied by Anne O. Krueger and later developed by other political economists to analyze the negative-sum results of rent-seeking on the privatization process. The crucial questions that are addressed in the research is: Does privatization eliminate or lessen rent-seeking? Are governments rent-seekers or are they growth-maximizers and through effective use of aid can allocate the resources efficiently to achieve development? To answer these questions, the study analyzes the obstacles (political, social, economic, legal, and technical) facing the privatization process, during the initiation and implementation stages. The theoretical argument is substantiated with empirical evidence by studying extensively the Turkish experience from 1979-1990, the years which witnessed the radical changes in the structure of the economic policies from an inward, import-substituting industrialization to an outward orientation with emphasis on import-led growth strategy and free market. Turkey's efforts to privatize collided with a fifty year concept of a paternal state where the government created the state-owned enterprises as part of the social contract to achieve national production and serve the social goals. Drawing on the empirical case study, the dissertation argues that privatization is a political socio-economic process of change. The success of these economic policies is anchored in the ability of its key actors to promote the concept by building powerful coalitions of public support, politicians, bureaucrats and interest groups, while containing the rent-seeking phenomenon to enhance development and eliminate social and economic waste.
Adaptive optimal designs applied to the logistic model
Creators: name: Awartani, Faisal Fakhri
Publisher: name: American University
Year: 2023

description: In this paper we develop a sequential procedure to approach the D-optimal design given a logistic response function. Chiang (1990) discussed the asymptotic properties of some sequential procedures designed to approach the D-optimal design asymptotically, using the maximum likelihood approach. Chiang could not show asymptotic normality and consistency for these procedures. We introduce an alternative to the maximum likelihood estimate. We show that the estimate of the D-optimal design, for both the one parameter case and the two parameter case, is consistent and asymptotically efficient, in the sense of the D-optimality criterion. Under the assumption that the scale parameter for the logistic response cure is known, a simulation study is conducted to compare the behavior of the maximum likelihood estimator and the new estimator for small or moderate sample size. We found that the new procedure perform better than the maximum likelihood approach on most of the values of the parameter space. Also, we proved theoretically, under the assumptions given by Chiang (1990) that the two procedure are asymptotically equivalent. Furthermore, this result is supported by the simulation. We noticed that the new procedure and the maximum likelihood approach perform the same in terms of the simulated mean square error loss.
Adaptive optimal designs applied to the logistic model
Creators: name: Awartani, Faisal Fakhri
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 49
subject: Mathematical sciences

description: In this paper we develop a sequential procedure to approach the D-optimal design given a logistic response function. Chiang (1990) discussed the asymptotic properties of some sequential procedures designed to approach the D-optimal design asymptotically, using the maximum likelihood approach. Chiang could not show asymptotic normality and consistency for these procedures. We introduce an alternative to the maximum likelihood estimate. We show that the estimate of the D-optimal design, for both the one parameter case and the two parameter case, is consistent and asymptotically efficient, in the sense of the D-optimality criterion. Under the assumption that the scale parameter for the logistic response cure is known, a simulation study is conducted to compare the behavior of the maximum likelihood estimator and the new estimator for small or moderate sample size. We found that the new procedure perform better than the maximum likelihood approach on most of the values of the parameter space. Also, we proved theoretically, under the assumptions given by Chiang (1990) that the two procedure are asymptotically equivalent. Furthermore, this result is supported by the simulation. We noticed that the new procedure and the maximum likelihood approach perform the same in terms of the simulated mean square error loss.
A compact, multi-pixel parametric light source
Creators: name: Minardi, Stefano
name: Varanavicius, Arunas
name: Piskarskas, Algis
name: Di Trapani, Paolo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The features of a compact, single pass, multi-pixel optical parametric generator are discussed. Several hundreds of independent high spatial-quality tunable ultrashort pulses were produced by pumping a bulk lithium triborate crystal with an array of tightly focussed intense beams. The array of beams was produced by shining a microlenses array with a large pump beam. Overall conversion efficiency to signal and idler up to 30% of the pump beam has been reported. Shot-to-shot energy fluctuation down to 3% was achieved for the generated radiation.
description: 11 pages, 6 figures, submitted to "Optics Communications"
Counting Plane Cubic Curves over Finite Fields with a Prescribed Number of Rational Intersection Points
Creators: name: Kaplan, Nathan
name: Matei, Vlad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11G20, 14G15, 94B27, 14G50, 14N10

description: For each integer $k \in [0,9]$, we count the number of plane cubic curves defined over a finite field $\mathbb{F}_q$ that do not share a common component and intersect in exactly $k\ \mathbb{F}_q$-rational points. We set this up as a problem about a weight enumerator of a certain projective Reed-Muller code. The main inputs to the proof include counting pairs of cubic curves that do share a common component, counting configurations of points that fail to impose independent conditions on cubics, and a variation of the MacWilliams theorem from coding theory.
description: 39 pages. To appear in European Journal of Mathematics
Critical dynamics, duality, and the exact dynamic exponent in extreme type II superconductors
Creators: name: Nogueira, Flavio S.
name: Manske, Dirk
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The critical dynamics of superconductors is studied using renormalization group and duality arguments. We show that in extreme type II superconductors the dynamic critical exponent is given exactly by $z=3/2$. This result does not rely on the widely used models of critical dynamics. Instead, it is shown that $z=3/2$ follows from the duality between the extreme type II superconductor and a model with a critically fluctuating gauge field. Our result is in agreement with Monte Carlo simulations.
description: 7 pages, no figures; version accepted for publication in PRB
BRST cohomology of timelike Liouville theory
Creators: name: Bautista, Teresa
name: Erbin, Harold
name: Kudrna, Matěj
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the Hermitian sector of the relative BRST cohomology of the spacelike and timelike Liouville theories with generic real central charge $c_L$ in each case, coupled to a spacelike Coulomb gas and a generic transverse CFT. This paper is a companion of arXiv:1905.12689, and its main goal is to completely characterize the cohomology of the timelike theory with $c_L \le 1$ which was defined there. We also apply our formulas to revisit the BRST cohomology of the spacelike Liouville theory with $c_L > 1$, which includes generalized minimal gravity. We prove a no-ghost theorem for the Hermitian sector in the timelike theory and for some spacelike models.
description: 25 pages; v2: 29 pages, minor improvements, match published version
Learning style as a correlate to course grade for a sample of students enrolled in community college telecourses
Creators: name: Harland-White, Faith Ann
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3903
subject: Education systems
classificationCode: 3904
subject: Specialist studies in education

description: The purpose of this study was to correlate the learning modes and styles of community college telecourse students with their final course grade. The rationale for examining this correlation was to identify characteristics of academically successful telecourse students. These characteristics could then be examined to differentiate appropriate advising and learning environments for all telecourse students. The participants in this study were 161 students enrolled in summer telecourses at one community college. All students completed a Personal Data Inventory, developed for this study by the researcher to elicit five items of census information, and the Learning Style Inventory (LSI) developed by David A. Kolb (1985). The LSI measures the degree to which an individual displays specific learning modes and styles. The LSI accomplishes this by weighting the relative emphasis a learner places on one of four learning modes: (a) Abstract Conceptualization, (b) Concrete Experience, (c) Active Experimentation, and (d) Reflective Observation. These weighted learning modes scores are used to identify one of four learner preferred styles which are (a) Assimilator, (b) Converger, (c) Accommodator, and (d) Diverger. The Kolb LSI is derived from experiential learning research which postulates that students learn in different ways in different environments. Four hypotheses were developed to examine the influence of each of the four learning modes. They were tested using t-tests for comparison of the means from the subscales of the Kolb LSI. A fifth hypothesis looked at the frequency of learning style occurrence and was tested using a two-by-two chi-square. The level of significance for all hypotheses testing was p $\leq$.05. Final analysis showed that no correlation existed between the four learning modes and academic success. However, indications of a correlation between Concrete Experience and Reflective Observation learning modes and a very high level of academic success was discovered. The study, also, did not show a correlation between learning style and academic success. These results would seem to suggest that the most capable students are academically successful regardless of learning mode and style.
Extension of the synchrotron radiation of electrons to very high energies in clumpy environments
Creators: name: Khangulyan, Dmitry
name: Aharonian, Felix
name: Romoli, Carlo
name: Taylor, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The synchrotron cooling of relativistic electrons is one of the most effective radiation mechanisms in astrophysics. It not only accompanies the process of particle acceleration but also has feedback on the formation of the energy distribution of the parent electrons. The radiative cooling time of electrons decreases with energy as $t_{\rm syn} \propto 1/E$; correspondingly the overall radiation efficiency increases with energy. On the other hand, this effect strictly limits the maximum energy of individual photons. Even in the so-called extreme accelerators, where the acceleration proceeds at the highest possible rate, $t_{\rm acc}^{-1} = eBc/E$, allowed in an ideal magnetohydrodynamic plasma, the synchrotron radiation cannot extend well beyond the characteristic energy determined by the electron mass and the fine-structure constant: $h ν^{\rm max} \sim m_e c^2/α\sim 70 \rm\,MeV$. In this paper, we propose a model in which the formation of synchrotron radiation takes place in compact magnetic blobs located inside the particle accelerator and develop a formalism for calculations of synchrotron radiation emerging from such systems. We demonstrate that for certain combinations of parameters characterizing the accelerator and the magnetic blobs, the synchrotron radiation can extend beyond this limit by a several orders of magnitude. This scenario requires a weak magnetization of the particle accelerator, and an efficient conversion of gas internal energy into magnetic energy in sufficiently small blobs. The required size of the blobs is constrained by the magnetic mirroring effect, that can prevent particle penetration into the regions of strong magnetic field under certain conditions.
description: 14 pages, 6 figures, accepted for publication in ApJ
title: JUMPING AT STRAIN RECOVERY IN SHAPE MEMORY Cu-Al-Ni SINGLE CRYSTALS
Creators: name: Nikolaev, V.I.
name: Timashov, R.B.
name: Pulnev, S.A.
name: Guzilova, L.I.
name: Butenko, P.N.
name: Stepanov, S.I.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: Shape memory Cu-Al-Ni single crystals of two alloy compositions Cu 82.5 wt.% - Al 13.5 wt.% - Ni 4.0 wt.% and Cu 81.98 wt.% - Al 14.02 wt.% - Ni 4.0 wt.% have been studied in view of their ability to undergo spontaneous jumping during reverse martensitic transformation. Crystals of both alloys were compressively deformed up to a full shape memory strain (8%) at room temperature. It was found that specimens of the first alloy with martensite structure jumped higher and demonstrated better reproducibility in cyclic tests. The height of the jump strongly depended on thermal pre-treatment and was unaffected by the strain rate during pre-strain by compression and the heating rate at shape recovery.
Calliopsis (Calliopsima) pectidis Shinn 1965
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Calliopsis
Calliopsis pectidis

description: Calliopsis (Calliopsima) pectidis Shinn, 1965
[Holotype: AMNH; ♂ 3.21 km northeast of Portal, Cochise County, Arizona, USA; August 21, 1962]
This species flies in the late summer and early fall and specializes on pollen from late-blooming Asteraceae including Baccharis L., Pectis L., and Heterotheca Cass. to name a few Shinn (1967). C. pecctidis inhabits in the southwestern USA and northwestern Mexico (Shinn 1967). We reviewed 19 paratypes reported by Shinn (1967): 18 from the Gulf Coast region collected in San Pedro in October 1941 (15 ♂, 3 ♀), and one female collected in Sierra Laguna in October 1941. See fig. 24.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on pages 70-71, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
Neutron scattering study of PbMg$_{1/3}$Ta$_{2/3}$O$_3$ and BaMg$_{1/3}$Ta$_{2/3}$O$_3$ complex perovskites
Creators: name: Gvasaliya, S. N.
name: Roessli, B.
name: Sheptyakov, D.
name: Lushnikov, S. G.
name: Shaplygina, T. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Neutron scattering investigations were carried out in PbMg$_{1/3}$Ta$_{2/3}$O$_3$ and BaMg$_{1/3}$Ta$_{2/3}$O$_3$ complex perovskites. The crystal structure of both compounds does not show any phase transition in the temperature range 1.5 -- 730 K. Whereas the temperature dependence of the lattice parameter of BaMg$_{1/3}$Ta$_{2/3}$O$_3$ follows the classical expectations, the lattice parameter of relaxor ferroelectric PbMg$_{1/3}$Ta$_{2/3}$O$_3$ exhibits anomalies. One of these anomalies is observed in the same temperature range as the peak in the dielectric susceptibility. We find that in PbMg$_{1/3}$Ta$_{2/3}$O$_3$, lead ions are displaced from the ideal positions in the perovskite structure at all temperatures. Consequently short-range order is present. This induces strong diffuse scattering with an anisotropic shape in wavevector space. The temperature dependences of the diffuse neutron scattering intensity and of the amplitude of the lead displacements are similar.
Learning style as a correlate to course grade for a sample of students enrolled in community college telecourses
Creators: name: Harland-White, Faith Ann
Publisher: name: American University
Year: 2023

description: The purpose of this study was to correlate the learning modes and styles of community college telecourse students with their final course grade. The rationale for examining this correlation was to identify characteristics of academically successful telecourse students. These characteristics could then be examined to differentiate appropriate advising and learning environments for all telecourse students. The participants in this study were 161 students enrolled in summer telecourses at one community college. All students completed a Personal Data Inventory, developed for this study by the researcher to elicit five items of census information, and the Learning Style Inventory (LSI) developed by David A. Kolb (1985). The LSI measures the degree to which an individual displays specific learning modes and styles. The LSI accomplishes this by weighting the relative emphasis a learner places on one of four learning modes: (a) Abstract Conceptualization, (b) Concrete Experience, (c) Active Experimentation, and (d) Reflective Observation. These weighted learning modes scores are used to identify one of four learner preferred styles which are (a) Assimilator, (b) Converger, (c) Accommodator, and (d) Diverger. The Kolb LSI is derived from experiential learning research which postulates that students learn in different ways in different environments. Four hypotheses were developed to examine the influence of each of the four learning modes. They were tested using t-tests for comparison of the means from the subscales of the Kolb LSI. A fifth hypothesis looked at the frequency of learning style occurrence and was tested using a two-by-two chi-square. The level of significance for all hypotheses testing was p $\leq$.05. Final analysis showed that no correlation existed between the four learning modes and academic success. However, indications of a correlation between Concrete Experience and Reflective Observation learning modes and a very high level of academic success was discovered. The study, also, did not show a correlation between learning style and academic success. These results would seem to suggest that the most capable students are academically successful regardless of learning mode and style.
Is Local Produce Really More Expensive? A Comparison of Direct Market and Conventional Grocery Produce Pricing
Creators: name: Salisbury, Karli
name: Curtis, Kynda
name: Pozo, Veronica
name: Durward, Carrie
name: Salisbury, Karli
name: Curtis, Kynda
name: Pozo, Veronica
name: Durward, Carrie
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: direct markets
subject: fresh produce
subject: grocery outlet
subject: local
subject: price comparisons

description: As fresh produce growers look to expand their markets to include lower-income consumers, they must overcome consumer perceptions that direct markets, such as farmers’ markets, are expensive and elitist. The absence of pricing data makes comparisons very difficult, which perpetuates misconceptions. This study uses fresh produce pricing data collected at farmers’ markets and grocery stores in northern Utah in Summer 2016 to illustrate actual pricing differences across outlets. Results show that, on average, farmers’ markets are more expensive, but location and produce item greatly influence price, especially for organics. Locally owned grocery stores were less expensive than national brands.
ESSAY (CORONA VIRUS).docx
Creators: name: Harkat Gde Widya Satria
Publisher: name: figshare
Year: 2020
Subjects: subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business
subject: 150601 Impacts of Tourism
subject: 150503 Marketing Management (incl. Strategy and Customer Relations)
subject: 150502 Marketing Communications
subject: 150603 Tourism Management
subject: 150604 Tourism Marketing
subject: 150605 Tourism Resource Appraisal
subject: 150699 Tourism not elsewhere classified
subject: 150606 Tourist Behaviour and Visitor Experience
subject: 150799 Transportation and Freight Services not elsewhere classified

description: ESSAY (CORONA VIRUS)Dampak virus Corona terhadap pariwisata
National mathematics standards and communicative competence: A sociolinguistic analysis of institutionalized and emergent forms of classroom discourse
Creators: name: Longo, Paul James
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 44
subject: Human society
classificationCode: 4401
subject: Anthropology
subject: FOS: Sociology

description: Educational reforms which call for a restructuring of classroom participation patterns in order to achieve academic excellence and educational equity hinge on the theory that social and scholastic inequities among students can be redressed at the classroom level by concentrating on classroom discourse. The current reform of mathematics education spearheaded by the National Council of Teachers of Mathematics (NCTM) subscribes to such an orientation. The particular NCTM Standard of "mathematics as communication" encourages mathematics teachers to promote open-ended, conversational discourse patterns in their classrooms. This study uses micro-ethnographic and sociolinguistic methods to examine mathematical discourse in K-2 classrooms where teachers have been trained to implement the NCTM Standards. It focuses specifically on questioning episodes between teachers and students. In this context the researcher has identified separate institutionalized and emergent forms of discourse that correspond to the interplay between behaviorist and constructivist approaches to learning in the mathematics classroom. Each form of discourse requires a distinct set of communicative competencies that teachers and students need to know in order to successfully set the NCTM Standards in motion. Educational reforms that aim to achieve academic excellence and educational equity by modifying classroom discourse so as to accommodate a constructivist approach to mathematics education need to encourage teachers to distinguish between institutionalized and emergent forms of classroom discourse for their sake and for the sake of their students.
National mathematics standards and communicative competence: A sociolinguistic analysis of institutionalized and emergent forms of classroom discourse
Creators: name: Longo, Paul James
Publisher: name: American University
Year: 2023

description: Educational reforms which call for a restructuring of classroom participation patterns in order to achieve academic excellence and educational equity hinge on the theory that social and scholastic inequities among students can be redressed at the classroom level by concentrating on classroom discourse. The current reform of mathematics education spearheaded by the National Council of Teachers of Mathematics (NCTM) subscribes to such an orientation. The particular NCTM Standard of "mathematics as communication" encourages mathematics teachers to promote open-ended, conversational discourse patterns in their classrooms. This study uses micro-ethnographic and sociolinguistic methods to examine mathematical discourse in K-2 classrooms where teachers have been trained to implement the NCTM Standards. It focuses specifically on questioning episodes between teachers and students. In this context the researcher has identified separate institutionalized and emergent forms of discourse that correspond to the interplay between behaviorist and constructivist approaches to learning in the mathematics classroom. Each form of discourse requires a distinct set of communicative competencies that teachers and students need to know in order to successfully set the NCTM Standards in motion. Educational reforms that aim to achieve academic excellence and educational equity by modifying classroom discourse so as to accommodate a constructivist approach to mathematics education need to encourage teachers to distinguish between institutionalized and emergent forms of classroom discourse for their sake and for the sake of their students.
The anisotropic Heisenberg chain in coexisting transverse and longitudinal magnetic fields
Creators: name: Dmitriev, D. V.
name: Krivnov, V. Ya.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The one-dimensional spin-1/2 $XXZ$ model in a mixed transverse and longitudinal magnetic field is studied. Using the specially developed version of the mean-field approximation the order-disorder transition induced by the magnetic field is investigated. The ground state phase diagram is obtained. The behavior of the model in low transverse field is studied on the base of conformal field theory. The relevance of our results to the observed phase transition in the quasi-one-dimensional antiferromagnet $Cs_2 Co Cl_4$ is discussed.
description: 18 pages, 6 figures
Learning to Structure an Image with Few Colors
Creators: name: Hou, Yunzhong
name: Zheng, Liang
name: Gould, Stephen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Color and structure are the two pillars that construct an image. Usually, the structure is well expressed through a rich spectrum of colors, allowing objects in an image to be recognized by neural networks. However, under extreme limitations of color space, the structure tends to vanish, and thus a neural network might fail to understand the image. Interested in exploring this interplay between color and structure, we study the scientific problem of identifying and preserving the most informative image structures while constraining the color space to just a few bits, such that the resulting image can be recognized with possibly high accuracy. To this end, we propose a color quantization network, ColorCNN, which learns to structure the images from the classification loss in an end-to-end manner. Given a color space size, ColorCNN quantizes colors in the original image by generating a color index map and an RGB color palette. Then, this color-quantized image is fed to a pre-trained task network to evaluate its performance. In our experiment, with only a 1-bit color space (i.e., two colors), the proposed network achieves 82.1% top-1 accuracy on the CIFAR10 dataset, outperforming traditional color quantization methods by a large margin. For applications, when encoded with PNG, the proposed color quantization shows superiority over other image compression methods in the extremely low bit-rate regime. The code is available at: https://github.com/hou-yz/color_distillation.
title: EFFECT OF PROCESS PARAMETERS ON THE CRYSTAL-PARAMETERS OF Cu-Zn SPINEL-FERRITES
Creators: name: Kumar, Naveen
name: Bharti, Ajaya
name: Kumar, Abhishek
name: Nigam, Abhishek
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: Spinel ferrite nano-powders are highly useful in applications such as drug-delivery, ferrofluids, gas sensors, etc. because of their semiconductor and ferromagnetic properties. There are various methods by which the spinel ferrites can be synthesized, i.e., hydro-thermal route, solid-state route, sol-gel route, thermal deposition route, mechanical milling, etc. In this work, nano-crystalline Cu-Zn ferrites with the composition of (Cu0.4Zn0.6Fe2O4) were synthesized from metal nitrate and acetate precursors by the hydro-thermal route and sol-gel auto-combustion route. Citric acid was used as a fuel to increase the rate of reaction. Synthesized powders were heat-treated for different holding time. The crystal structures of these compounds were characterized by X-ray diffraction (XRD). The crystal size and lattice parameter were determined by using Maud analysis and Williamson-hall plots. The Rietveld analysis and X'Pert Highscore peak match analysis confirmed the formation of single-phase Cu0.4Zn0.6Fe2O4. It was observed that crystallite size and peak intensity increased after heat treatment. Also, on increasing the holding time of heat treatment, an increase in the peak intensity and crystallite size was observed.
Lie Symmetries of (1+1)-Dimensional Cubic Schrödinger Equation with Potential
Creators: name: Popovych, Roman O.
name: Ivanova, Nataliya M.
name: Eshraghi, Homayoon
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 35A30; 35Q55; 58J70; 81R05

description: We perform the complete group classification in the class of cubic Schrödinger equations of the form $iψ_t+ψ_{xx}+ψ^2ψ^*+V(t,x)ψ=0$ where $V$ is an arbitrary complex-valued potential depending on $t$ and $x$. We construct all possible inequivalent potentials for which these equations have non-trivial Lie symmetries using algebraic and compatibility methods simultaneously. Our classification essentially amends earlier works on the subject.
description: 6 pages
title: Domestic slavery in Syria and Egypt, 1200-1500
Creators: name: Hagedorn, Jan Hinrich
Publisher: name: University of St Andrews
Year: 2019

description: This study investigates domestic slavery in Syrian and Egyptian society from the thirteenth century to the fifteenth century. It focuses on the agency of slaves in the context of master-slave relationships within households and in wider society. It argues that the ability of slaves to shape the world around them was underpinned by a constant process of negotiation within the master-slave relationship and that intermediaries such as the court system channelled the agency of slaves. The principal sources for this study are purchase contracts, listening certificates, marriage contracts, and estate inventories in combination with scribal, market inspection, and slave purchase manuals as well as chronicles. The structure of the study broadly follows the life cycle of slaves from importation to integration, accommodation, procreation, the possibility of manumission, and death. The first chapter investigates the topography and the commercial practices of slave markets, where owners chose slaves and initiated a deeply unequal personal bond which assigned a new function and identity to newly imported slaves. The second chapter provides two case studies based on manuscript collections in order to historicize and problematize the patterns set out previously. The third chapter studies the social integration of slaves and freed slaves on the basis of listening certificates. It argues that the slave population consisted mainly of imported Ethiopian and Turkish slaves who were highly integrated into urban society. The fourth chapter discusses the sexual dimension of domestic slavery by focusing on concubinage, marriage, and slave procreation. It brings together a range of documentary and legal sources to provide case studies of strategies of accommodation and resistance. The fifth chapter investigates manumission and its impact on the household dynamics of slavery. The sixth and final chapter analyses a collection of estate inventories of freed slaves and discusses the continuity of master-slave relations after manumission.
SIMULAÇÕES DO RUÍDO DE AERONAVES DE CARGA PARA DIFERENTES RECEPTORES CRÍTICOS
Creators: name: Bentes, Flavio
Publisher: name: figshare
Year: 2020
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering
subject: Aerospace Engineering
subject: 91301 Acoustics and Noise Control (excl. Architectural Acoustics)

description: O ruído aeroportuário produz vários efeitos adversos nos seres humanos, tais como incômodo, interferências na comunicação oral e no sono. Este estudo tem como objetivo analisar a influência do ruído sobre o sono da população, especialmente a causada por aviões de carga, uma vez que são aeronaves pesadas e barulhentas, com um grande número de operações, pousos e decolagens durante a noite. Os percentuais de interrupção do sono durante a passagem de n aeronaves serão calculados e estudos de análise de sensibilidade serão realizados considerando diferentes cenários.
Crop Rotation Systems for High-Value, Cool-Season Vegetables in the Southern United States
Creators: name: Kaninda Tshikala, Sam
name: Fonsah, Esendugue Greg
name: Boyhan, George
name: Little, Elizabeth
name: Gaskin, Julia
name: Kaninda Tshikala, Sam
name: Fonsah, Esendugue Greg
name: Boyhan, George
name: Little, Elizabeth
name: Gaskin, Julia
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: demand
subject: organic food
subject: vegetables
subject: crop rotation
subject: southern region
subject: U.S.

description: Demand for organic food has increased tremendously over the last decade in the United States. In the Southeast, high demand for organic food has sparked interest in organic production techniques among conventional vegetable growers and put increasing demand on existing organic growers. However, little information is available on profitable organic vegetable crops suitable for the region. This study analyzes crop rotation systems for high-value, cool-season vegetables to develop production and economic models to help growers increase profit and reduce risk.
Cotype and nonlinear absolutely summing mappings
Creators: name: Pellegrino, Daniel M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B15, 46G25

description: In this paper we study absolutely summing mappings on Banach spaces by exploring the cotype of their domains and ranges. It is proved that every $n$% -linear mapping from $\mathcal{L}_{\infty}$-spaces into $\mathbb{K}$ is $% (2;2,...,2,\infty)$-summing and also shown that every $n$-linear mapping from $\mathcal{L}_{\infty}$-spaces into $F$ is $(q;2,...,2)$-summing whenever $F$ has cotype $q.$ We also give new examples of analytic summing mappings and polynomial and multilinear versions of a linear Extrapolation Theorem.
Prehistoric economies during the Late Woodland period of the Potomac Valley: An examination of animal resource utilization
Creators: name: Moore, Elizabeth Ann
Publisher: name: American University
Year: 2023

description: This research describes differences in the prehistoric economies of two Late Woodland archaeological cultures, the Montgomery Complex and the Luray Focus, and examines the relationship between these differences and other sociocultural factors. Zooarchaeological data used to perform this examination were collected from six sites. The relative completeness and research utility of all assemblages was determined. Other artifact classes and site features were described to provide a more complete view of these sites. The zooarchaeological data was used to define four key aspects of hunting strategies--the diversity of vertebrate taxa exploited, the habitats which were exploited to acquire those taxa, the exploitation of seasonally available resources, and the techniques used to hunt deer. At the sites from the Montgomery Complex, a wide variety of taxa were hunted or collected from all of the surrounding habitats. Deer were hunted with a specific strategy at the Rosenstock site, a strategy that resulted in the killing of the age groups that were of maximum meat-yielding age and size. Seasonally abundant resources were targeted for exploitation as they became available. As an overall pattern, the occupants of the Montgomery Complex sites appear to have been maximizing the exploitation of many of the animal resources found in the area. The hunting strategies at sites from the Luray Focus contrast to those from the Montgomery Complex in several ways. First, only a limited number of animal taxa were being hunted or collected. These taxa were probably found in the gardens or garden borders. Second, the seasonally available resources in the area were not targeted for maximum exploitation. The presence of seasonally available resources in the assemblages is marginal and their collection was probably opportune and not necessarily part of a deliberate strategy to exploit those particular taxa. Several sociocultural factors that may be related to these differences in hunting strategies are examined. These factors include a possible increase in the dependence upon cultivars, an increase in the use of defensive fortifications, and differences in stalking techniques for deer hunting. Finally, the implications of the relationship between these factors and the differences in the overall economies as reflected in the hunting strategies are discussed.