cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exactly solvable approximating models for Rabi Hamiltonian dynamics
Creators: name: Pereverzev, Andrey
name: Bittner, Eric R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The interaction between an atom and a one mode external driving field is an ubiquitous problem in many branches of physics and is often modeled using the Rabi Hamiltonian. In this paper we present a series of analytically solvable Hamiltonians that approximate the Rabi Hamiltonian and compare our results to the Jaynes-Cummings model which neglects the so-called counter-rotating term in the Rabi Hamiltonian. Through a unitary transformation that diagonlizes the Jaynes-Cummings model, we transform the counter-rotating term into separate terms representing several different physical processes. By keeping only certain terms, we can achieve an excellent approximation to the exact dynamics within specified parameter ranges.
Optimization of primary gyratory crushing at Highland Valley Copper
Creators: name: Rosario, Persio P.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents the work done in a collaborative research project between the University of British Columbia and Highland Valley Copper. The research was aimed at understanding gyratory crusher liner wear in the overall context of the crushing process. Wear measurements were taken for in-service crushers during the research period using a novel laser profile measurement device. Data from the wear measurements was correlated with crusher production information such as current draw and throughput. This work resulted in enhanced knowledge of crushing chamber characteristics and their impact on crushing performance. In addition, an innovative and powerful way to evaluate crusher liner profiles was developed and new mantle profiles were designed.
Origin of Interstitial Doping Induced Coercive Field Reduction in Ferroelectric Hafnia
Creators: name: Zhu, Tianyuan
name: Ma, Liyang
name: Duan, Xu
name: Liu, Shi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Hafnia-based ferroelectrics hold promise for nonvolatile ferroelectric memory devices. However, the high coercive field required for polarization switching remains a prime obstacle to their practical applications. A notable reduction in coercive field has been achieved in ferroelectric Hf(Zr)$_{1+x}$O$_2$ films with interstitial Hf(Zr) dopants [Science 381, 558 (2023)], suggesting a less-explored strategy for coercive field optimization. Supported by density functional theory calculations, we demonstrate the $Pca2_1$ phase, with a moderate concentration of interstitial Hf dopants, serves as a minimal model to explain the experimental observations, rather than the originally assumed rhombohedral phase. Large-scale deep potential molecular dynamics simulations suggest that interstitial defects promote the polarization reversal by facilitating $Pbcn$-like mobile 180$^\circ$ domain walls. A simple pre-poling treatment could reduce the switching field to less than 1 MV/cm and enable switching on a subnanosecond timescale. High-throughput calculations reveal a negative correlation between the switching barrier and dopant size and identify a few promising interstitial dopants for coercive field reduction.
Committee neural network potentials control generalization errors and enable active learning
Creators: name: Schran, Christoph
name: Brezina, Krystof
name: Marsalek, Ondrej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: It is well known in the field of machine learning that committee models improve accuracy, provide generalization error estimates, and enable active learning strategies. In this work, we adapt these concepts to interatomic potentials based on artificial neural networks. Instead of a single model, multiple models that share the same atomic environment descriptors yield an average that outperforms its individual members as well as a measure of the generalization error in the form of the committee disagreement. We not only use this disagreement to identify the most relevant configurations to build up the model's training set in an active learning procedure, but also monitor and bias it during simulations to control the generalization error. This facilitates the adaptive development of committee neural network potentials and their training sets, while keeping the number of ab initio calculations to a minimum. To illustrate the benefits of this methodology, we apply it to the development of a committee model for water in the condensed phase. Starting from a single reference ab initio simulation, we use active learning to expand into new state points and to describe the quantum nature of the nuclei. The final model, trained on 814 reference calculations, yields excellent results under a range of conditions, from liquid water at ambient and elevated temperatures and pressures to different phases of ice, and the air-water interface - all including nuclear quantum effects. This approach to committee models will enable the systematic development of robust machine learning models for a broad range of systems.
description: The following article has been submitted to the Journal of Chemical Physics
Labour inputs and financial profitability of conventional and agroforestry-based soil fertility management practices in Zambia
Creators: name: Ajayi, Olu Clifford
name: Akinnifesi, Festus K.
name: Sileshi, G.
name: Kanjipite, W.
name: Ajayi, Olu Clifford
name: Akinnifesi, Festus K.
name: Sileshi, G.
name: Kanjipite, W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Demand and Price Analysis
subject: Land Economics/Use
subject: Benefit-cost analysis
subject: impact assessment
subject: land use management
subject: project analysis
subject: sustainable agriculture

description: Several agro-ecological practices have been developed to increase the range of soil fertility management options available to farmers, but little information is available on their labour input requirement and profitability relative to conventional practices. This study used a multiple visit cost-route method to estimate labour inputs and financial profitability of agroforestry-based and conventional (with and without fertiliser) soil fertility management practices in eastern Zambia. Results show that aggregated over a five-year cycle, labour inputs used under agroforestry practices were lower than fertilised maize fields but higher than non-fertilised continuous cropped maize. Agroforestry practices were more profitable (NPV ranging between $233 and $327 ha-1) than unfertilised maize fields (NPV of $130 ha-1) but less profitable than fertilised maize fields. The NPV for the latter is $499 ha-1 under a 50% government subsidy on fertiliser but, it fell to $349 ha-1 when the subsidy effect is removed. In terms of return per unit investment cost, agroforestry practices performed better with a benefit to cost ratio ranging between 2.77 to 3.13 in contrast to 2.65 (subsidised fertiliser) and 1.77 (non-subsidised fertiliser). The returns to labour per person day was $2.56 in (non-subsidised) fertilised maize field, $3.16 in subsidised fertiliser field, $2.63 in Gliricidia fields, $2.41 in Sesbania fields, $1.90 in Tephrosia fields, and $1.10 in non-fertilised maize fields. The results do not support the popular notion that agroforestry practices are more labour intensive. It suggests that in addition to total labour use requirements, the temporal distribution of labour use during the farming season is important. It is concluded that agroforestry practices are profitable, and could contribute to food security.
Content validity of the Virtual Neurocognitive Tracking Test for child population
Creators: name: Rico Velasco, Gloria Andrea
name: Grisales, Andres
name: Toro Arias, Juan
name: Benavides, Paola
Publisher: name: Mediterranean Journal of Clinical Psychology
Year: 2023
Subjects: Psychometrics; Cognitive function; Clinical Psychology; Preschool children; Screening; instrument validation.

description: Objective: This research aims to validate the content of the Screening Test (PRANI) for children, focusing on the development of cognitive tests tailored to the Spanish-speaking population in Latin America.


Method: In this non-experimental, instrumental study, the psychometric properties of a new cognitive test were analyzed, focusing on theoretical validation rather than direct child population application. A panel of nine Child Neuropsychology experts assessed 149 items of a virtual neuropsychological test across five cognitive processes. They used a Likert-type scale for evaluation, focusing on criteria like relevance and writing quality. Content validity was established using the Aiken V coefficient and confidence intervals, emphasizing expert consensus in test development and refinement.


Results: The study resulted in the consolidation of an instrument, reducing the test length from 149 to 119 items by eliminating 30 elements. Significant variations were observed between the initial version of the instrument and the refined version after the expert ratings analysis, which evaluated cognitive processes such as attention, memory, language, visuoconstructive skills, executive functions, and academic skills. A comprehensive assessment of the instrument's content validity was obtained before and after the judges' analysis. Notably, the initial mean values of the Aiken V coefficients were high, both globally and by process and component.


Conclusions: This study highlights the importance and efficacy of developing culturally adapted cognitive assessment tools for children in Latin America, particularly in the Colombian child population. The findings emphasize the necessity for specific cognitive tests for this demographic, providing a reliable and validated framework for their implementation.
description: Mediterranean Journal of Clinical Psychology, Vol 11, No 3 (2023)
Nonperturbative Effects on T_c of Interacting Bose Gases in Power-Law Traps
Creators: name: Zobay, O.
name: Metikas, G.
name: Kleinert, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The critical temperature T_c of an interacting Bose gas trapped in a general power-law potential V(x)=\sum_i U_i|x_i|^{p_i} is calculated with the help of variational perturbation theory. It is shown that the interaction-induced shift in T_c fulfills the relation (T_c-T_c^0)/T_c^0= D_1(eta)a + D'(eta)a^{2 eta}+ O(a^2) with T_c^0 the critical temperature of the trapped ideal gas, a the s-wave scattering length divided by the thermal wavelength at T_c, and eta=1/2+\sum_i 1/p_i the potential-shape parameter. The terms D_1(eta)a and D'(eta) a^{2 eta} describe the leading-order perturbative and nonperturbative contributions to the critical temperature, respectively. This result quantitatively shows how an increasingly inhomogeneous potential suppresses the influence of critical fluctuations. The appearance of the a^{2 eta} contribution is qualitatively explained in terms of the Ginzburg criterion.
description: Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of paper (including all PS fonts) at http://www.physik.fu-berlin.de/~kleinert/352
fibrosis
Creators: name: LEI, LIN
Publisher: name: figshare
Year: 2022
Subjects: subject: 70706 Veterinary Medicine
subject: FOS: Veterinary sciences

description: Fatty liver (i.e., hepatic lipidosis) is a major metabolic disorder of dairy cows during the transition period, accompanied by numerous pathological alterations. We observed that dairy cows with mild and moderate fatty liver exhibited hepatic extracellular matrix (ECM) deposition and hepatic stellate cell (HSC) activation, thereby contributing to the occurrence of liver fibrosis. This was closely associated with liver lipid accumulation, oxidative stress, hepatocyte apoptosis, and liver inflammation. Thus, liver fibrosis is a common pathologic response to liver injury in dairy cows with fatty liver. Our findings add insights into the pathological alterations associated with fatty liver in dairy cows.
Extended E8 Invariance of 11-Dimensional Supergravity
Creators: name: de Buyl, S.
name: Henneaux, M.
name: Paulot, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The hyperbolic Kac-Moody algebra E10 has repeatedly been suggested to play a crucial role in the symmetry structure of M-theory. Recently, following the analysis of the asymptotic behaviour of the supergravity fields near a cosmological singularity, this question has received a new impulse. It has been argued that one way to exhibit the symmetry was to rewrite the supergravity equations as the equations of motion of the non-linear sigma model E10/K(E10). This attempt, in line with the established result that the scalar fields which appear in the toroidal compactification down to three spacetime dimensions form the coset E8/SO(16), was verified for the first bosonic levels in a level expansion of the theory. We show that the same features remain valid when one includes the gravitino field
description: 9 pages
Development of emiprical [sic] and numerical design techniques in burst prone ground at the Red Lake Mine
Creators: name: Kumar, Pravin
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is divided into three sections. It presents the development of empirical and numerical design techniques at Goldcorp Inc's Red Lake Mine. The first section expands upon the understanding of the rockburst mechanism at the mine. Four known rockbursts were analysed to better understand the mechanism. Some variables such as excavation span, dip of orebody, time, location and geology were studied in detail to understand its effect on seismicity and rockbursting. The second section explains the updating of the span graph, which can now be applied to cut and fill stopes in burst prone ground. The third section deals with the development of pillar design techniques. Five failure criteria were calibrated to the Red Lake Mine ground conditions from first principles. A design procedure specific to conditions for entry-type mining within burst prone ground is provided. At the center of the procedure is an "empirical span design chart" and "pillar design methodology" for entry-type excavation. This provides a practical tool for a mining engineer to design a stable entry-type excavation within burst prone ground.
Lessons Learned from 25 Years of Food Security Research, Capacity-Building, and Outreach.
Creators: name: Food Security Group At Michigan State University
name: Food Security Group At Michigan State University
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Development
subject: Research Methods/ Statistical Methods
subject: Africa
subject: Food Security
subject: research
subject: capacity building
subject: outreach

description: Decades of research have led to substantially improved understanding of the nature of food insecurity. Until the food crisis of 2007/08, a combination of economic growth and targeted programs resulted in a steady fall in the percentage of the world’s population suffering from under-nutrition (from 20% in 1990/92 to 16% in 2006). Yet over a billion people still face both chronic and/or transitory food insecurity due to long-standing problems of inadequate income, low-productivity in agricultural production and marketing, and related problems of poor health and absence of clean water. Among regions of the world, the greatest number of the food insecure lives in South Asia, while Sub-Saharan Africa (SSA) has the highest proportion of population that is food insecure. Achieving adequate food security for such a large number of people is increasingly challenging due to a combination of economic, social, political and environmental factors. This document contains an overview of the past 25 years of research, capacity-building, and outreach by MSU’s Food Security Group. The paper describes key elements of the FSG approach and draws lessons regarding the value of that model. It also examines the insights gained from research and outreach, primarily in Africa, and their value to the U.S. Global Food Security Initiative in addressing the major current challenges facing food and agricultural systems.
Non-locality and entanglement in multi-qubit systems from a unified framework
Creators: name: Asthana, Sooryansh
name: Adhikary, Soumik
name: Ravishankar, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-classical probability is the underlying feature of quantum mechanics. The emergence of Bell-CHSH non-locality for bipartite systems and linear entanglement inequalities for two-qubit systems has been shown in Adhikary et al. 2020 [Eur. Phys. J. D 74, 68 (2020)], purely as violations of classical probability rules. In this paper, we improve upon that work by showing that violation of any nonlocality inequality implies violation of classical probability rules, manifested through negative probabilities, without recourse to any underlying theory. Moving on to entanglement, we employ parent pseudoprojections to show how any number of linear and nonlinear entanglement witnesses for multiqubit systems can be obtained as violations of classical probability rules. They include the ones that have been derived earlier by employing different methods. It provides a perspective complementary to the current understanding in terms of the algebraic approaches.
description: A new proof added in section (4) and in appendix (A). 31 pages, 3 figures
Homogenization of layered materials with rigid components in two-slip finite crystal plasticity
Creators: name: Ishikawa, Akira
name: Svadlenka, Karel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J45 (Primary) 74Q05, 74C15 (Secondary)

description: This paper is an extension of the result by Christowiak and Kreisbeck (2017), which addresses the Gamma-convergence approach to a homogenization problem for composite materials consisting of two distinct types of parallel layers. In Christowiak et al. (2017), one of the layers of the material undergoes only local rotations while the other allows local rotation and plastic deformation along a single slip system. On the other hand, real materials show an interplay of multiple directions of slip. Here we obtain the Gamma-limit for the problem where the number of slip directions is increased to two. When the slip systems are orthogonal, we derive the full homogenized energy based on generalized convex envelopes of the original energy density. Since these envelopes are not completely known for angles between slip directions differing from the right angle, we present a partial, conditional homogenization result in this general case. The analysis is based on a modification of the classical construction of laminate microstructures but several nontrivial difficulties arise due to nonconvex constraints being present in the composite energy.
Fluctuations and Correlations in Causal Set Theory
Creators: name: Moradi, Heidar
name: Yazdi, Yasaman K.
name: Zilhão, Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the statistical fluctuations (such as the variance) of causal set quantities, with particular focus on the causal set action. To facilitate calculating such fluctuations, we develop tools to account for correlations between causal intervals with different cardinalities. We present a convenient decomposition of the fluctuations of the causal set action into contributions that depend on different kinds of correlations. This decomposition can be used in causal sets approximated by any spacetime manifold $\mathcal M$. Our work paves the way for investigating a number of interesting discreteness effects, such as certain aspects of the Everpresent $Λ$ cosmological model.
description: 40 pages, 2 figures. v2: added discussion and appendix with examples of explicit parametrizations of some relevant integrals
Book Review: Santo Di Nuovo and Maria Sinatra (eds.) (2023). How to Measure Mind: A Historical and Epistemological Approach to Psychological Assessment. Göttingen: Hogrefe
Creators: name: Volpone, Alessandro
Publisher: name: Mediterranean Journal of Clinical Psychology
Year: 2023

description: At present, psychology has become a highly diverse field of scientific study and applied technology, whose pursuits are matched by greater heterogeneity among psychologists, who currently deal with a wide variety of objects of investigation and apply a vast array of methods. Nevertheless, the main purpose of its origins was more unified because it aimed at finding and developing methods to measure human mind (though also through the body). 
description: Mediterranean Journal of Clinical Psychology, Vol 11, No 3 (2023)
Improving Food Security in Africa: Highlights of 25 Years of Research, Capacity-Building, and Outreach.
Creators: name: Food Security Group At Michigan State University
name: Food Security Group At Michigan State University
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Food Security and Poverty
subject: International Development
subject: Land Economics/Use
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Africa
subject: Food Security
subject: research
subject: capacity building
subject: outreach

description: Decades of research have led to substantially improved understanding of the nature of food insecurity. A combination of economic growth and targeted programs resulted in a steady fall (until the food crisis of 2007/08) in the percentage of the world’s population suffering from undernutrition (from 20% in 1990/92 to 16% in 2006). Yet over a billion people still face both chronic and/or transitory food insecurity due to long-standing problems of inadequate income, low-productivity in agricultural production and marketing, and related problems of poor health and absence of clean water. Assuring adequate food security for such a large share of the world’s population is increasingly challenging due to continuing resource degradation driven by a combination of population pressure and outdated agricultural practices, poorly functioning input markets, rapid urbanization, increased concerns about food safety, and climate change. This document contains an overview of the past 25 years of research, capacity-building, and outreach by MSU’s Food Security Group. The paper describes key elements of the FSG approach and draws lessons regarding the value of that model. Insights gained from research and outreach and their value in addressing the major current challenges facing food and agricultural systems in Africa are summarized in FSG (2009).
Interaction-induced topological phase transition at finite temperature
Creators: name: Huang, Ze-Min
name: Diehl, Sebastian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We demonstrate the existence of topological phase transitions in interacting, symmetry-protected quantum matter at finite temperatures. Using a combined numerical and analytical approach, we study a one-dimensional Su-Schrieffer-Heeger model with added Hubbard interactions, where no thermodynamic phase transition occurs at finite temperatures. The transition is signalled by a quantized, non-local bulk topological order parameter. It is driven by defects, which are enabled by the combination of interaction and thermal activation, with no counterpart in the non-interacting limit. The defects localize topological zero modes, which, when sufficiently abundant, cause the order parameter to vanish. This phenomenon, interpreted via bulk-boundary correspondence, reflects the loss of a topological edge mode at a well-defined critical temperature in the thermodynamic limit. Unlike zero-temperature topological transitions, these finite-temperature transitions lack thermodynamic signatures but remain observable in controlled quantum systems, such as ultracold fermionic atoms in optical lattices.
description: 6+5 pages, 7 figures
Can The Momentum be Sustained? An Economic Analysis of the Ministry of Agriculture/Sasakawa Global 2000's Experiment with Improved Cereals Technology in Ethiopia
Creators: name: Howard, Julie A.
name: Demeke, Mulat
name: Kelly, Valerie A.
name: Maredia, Mywish K.
name: Stepanek, Julie
name: Howard, Julie A.
name: Demeke, Mulat
name: Kelly, Valerie A.
name: Maredia, Mywish K.
name: Stepanek, Julie
Publisher: name: Unknown
Year: 1998
Subjects: subject: Crop Production/Industries
subject: food security
subject: food policy
subject: Ethiopia
subject: SG2000

description: Although the MOA/SG program was widely considered to be a success, no formal analysis had been carried out to determine the farm-level profitability of the program’s improved technology packages. In September 1997 MOA/SG agreed to collaborate with the Grain Marketing Research Project (GMRP) and the Department of Agricultural Economics at Michigan State University (MSU). This paper analyzes the financial returns to the recommended technology packages and determines the major factors affecting yield response.
description: A Joint Research Activity of: Grain Marketing Research Project/Michigan State University, Sasakawa Global 2000, Ministry of Agriculture Department of Extension and Cooperatives, Ethiopian Agricultural Research Organization
Michał Zembrzuski - Analiza problematyki filozoficznej zawartej w "Kwodlibecie" Tomasza z Akwinu: "Czy anioł jest substancjalnie złożony z istoty i istnienia?"
Creators: name: Michał Zembrzuski
Publisher: name: figshare
Year: 2020
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion

description: "Rocznik Tomistyczny", 1 (2012), s. 249-254
Wildlife Conservation in Zambia: Impacts on Rural Household Welfare
Creators: name: Fernandez, Ana
name: Richardson, Robert B.
name: Tschirley, David L.
name: Tembo, Gelson
name: Fernandez, Ana
name: Richardson, Robert B.
name: Tschirley, David L.
name: Tembo, Gelson
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Food Security and Poverty
subject: International Development
subject: Land Economics/Use
subject: zambia
subject: food security
subject: tourism
subject: conservation
subject: household income

description: Tourism is one of the most rapidly growing economic sectors in the world, especially in developing countries; growth rates in international tourist arrivals and receipts in these countries are roughly double the world average. In Zambia, the tourism sector has grown steadily in recent years; international tourist arrivals from 1990 to 2005 grew at an average annual rate of 9.7%, and tourism receipts grew at 10.2%, compared to average growth rates for developing countries of 6.6% and 9.9%, respectively. Tourism in Zambia is largely based on the country’s stock of natural resources, particularly the system of national parks (NPs) and game management areas (GMAs). GMAs serve as buffer zones between the NPs and rural agricultural land. They were intended to promote sustainable hunting as an alternative to activities not compatible with wildlife protection. The Zambia Wildlife Authority partners with community organizations to share wildlife management responsibilities and revenue from hunting licenses.
description: FOOD SECURITY RESEARCH PROJECT, LUSAKA, ZAMBIA
Moment operators of the Cartesian margins of the phase space observables
Creators: name: Kiukas, J.
name: Lahti, P.
name: Ylinen, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The theory of operator integrals is used to determine the moment operators of the Cartesian margins of the phase space observables generated by the mixtures of the number states. The moments of the $x$-margin are polynomials of the position operator and those of the $y$-margin are polynomials of the momentum operator.
description: 14 pages
Associative realizations of the extended Snyder model
Creators: name: Meljanac, S.
name: Mignemi, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The star product usually associated to the Snyder model of noncommutative geometry is nonassociative, and this property prevents the construction of a proper Hopf algebra. It is however possible to introduce a well-defined Hopf algebra by including the Lorentz generators and their conjugate momenta into the algebra. In this paper, we study the realizations of this extended Snyder spacetime, and obtain the coproduct and twist and the associative star product in a Weyl-ordered realization, to first order in the noncommutativity parameter. We then extend our results to the most general realizations of the extended Snyder spacetime, always up to first order.
description: 10 pages; version accepted for publication on Phys. Rev. D
Intuitive Nutrition Co-factor of Emotional Equilibrium for Maintaining Nutritional Balance: A Prospective Study
Creators: name: Curis, Cecilia
name: Moroianu, Marius
name: Moroianu, Lavinia- Alexandra
name: Reurean Pintilei, Delia
name: Ardeleanu, Valeriu
name: Bobirca, Anca
name: Mahler, Beatrice
name: Pantea Stoian, Anca
Publisher: name: Mediterranean Journal of Clinical Psychology
Year: 2023
Subjects: Clinical Psychology; Eating disorders; Emotional balance; Intuitive eating; Nutritional balance.

description: Background and objectives: Intuitive nutrition represents a disputed topic when subjects about weight loss and diets are approached worldwide. The current study aims to emphasize the causal relationship between emotional status and intuitive eating, starting from the hypothesis that a nutritional imbalance can be determined by an emotional imbalance.


Materials and Methods: This prospective study included 73 subjects, aged between 18-70, with a sex ratio of 21:52 male to female and it was designed to use digital methods to collect data from the sample of subjects through online questionnaires, collection software and automatic statistical analysis of data. The collected data was analysed in parallel using the Minitab software and Office Excel.


Results: Data processing confirmed the working hypothesis, namely that emotional status influences the way of eating and intuitive eating can contribute to maintaining emotional balance. Also, the statistical analysis show Mean=24.33, SD= 14.46, a Median of 17 and a level of Confidence of 35.94%.


Conclusions: Intuitive nutrition can be a helpful factor in maintaining emotional balance directly related to nutrition. Disturbance of emotional balance facilitates the adoption of a way of nutrition that can be classified under the category of eating disorders, attracting a procession of somatic and psychological consequences.
description: Mediterranean Journal of Clinical Psychology, Vol 11, No 3 (2023)
Access to Land and Poverty Reduction in Rural Zambia: Connecting the Policy Issues
Creators: name: Jayne, Thomas S.
name: Zulu, Ballard
name: Kajoba, Gear
name: Weber, Michael T.
name: Jayne, Thomas S.
name: Zulu, Ballard
name: Kajoba, Gear
name: Weber, Michael T.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Food Security and Poverty
subject: Land Economics/Use
subject: zambia
subject: food security
subject: land
subject: policy

description: Key Policy Message: - Despite having relatively low population densities, inadequate access to land is one of the major causes of rural poverty in Zambia. - The apparent paradox of inadequate access to land for many rural households in a country of low population density is partially reconciled when taking into account that economically viable arable land requires at least some degree of access to basic services, water, road infrastructure, and markets. The basic public investments to make settlement economically viable have yet been made in many areas of Zambia. - Depending of future land allocation policy, access to good quality land with a market potential may become increasingly beyond the reach of many small-scale farm households, making it more difficult to achieve a smallholder-led, pro-poor agricultural development trajectory.
"ins1289225_cutflow_tables.tar.gz" of "Search for supersymmetry at sqrt(s)=8 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector"
Creators: name: ATLAS Collaboration
Publisher: name: HEPData
Year: 2014

description: ins1289225_cutflow_tables.tar.gz (unpack then view insert.html)
description: CERN-LHC. A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or mu) with the same electric charge, or at least three isolated leptons. The search also utilises jets originating from b-quarks, missing transverse momentum and other observables to extend its sensitivity. The analysis uses a data sample corresponding to a total integrated luminosity of 20.3 fb^-1 of sqrt(s) = 8 TeV proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider in 2012. No deviation from the Standard Model expectation is observed. New or significantly improved exclusion limits are set on a wide variety of supersymmetric models in which the lightest squark can be of the first, second or third generations, and in which R-parity can be conserved or violated. In the tables below, the efficiency is defined as the number of reconstructed events divided by the number of generated events. These numbers are calculated for events passing the selection requirements of each signal region. Please note that b-tagging efficiency, the requirement on the number of b-quark-initiated jets, is fully efficient for the generated events. The inefficiency of identifying b-jets using observed, reconstructed, data leads to significant migrations between the signal regions and, therefore, the efficiency can be greater than one. Acceptances are calculated using stable particles from MC event generators. For the acceptance calculation, final state electrons and muons from decays of massive W, Z, H bosons and SUSY particles are considered. The same kinematic requirements are applied as at reconstruction level, with the exception of the lepton-jet overlap requirements. Jets within a distance of Delta(R) = 0.2 of an electron are rejected, but leptons close to remaining jets are retained.
Gravitational Microlensing of Fractal Sources
Creators: name: Lewis, Geraint F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gravitational microlensing has proven to be a powerful tool in the study of quasars, providing some of the strongest limits on the scales of structure in the central engine. Typically sources are considered to be smoothly varying on some particular scale; such simple sources result in recognisable time scales in microlensing light curves from which the size of the source can be determined. Various emission processes, however, result in sources with a fractal appearance, possessing structure on a range of scales. Here, the gravitational microlensing of such fractal sources at the heart of quasars is considered. It is shown that the resulting light curves reflect the fractal nature of the sources, possessing pronounced structure at various scales, markedly different to the case with the random distribution of emission clouds that are typically considered. Hence, the determination of a characteristic scale of variability in a microlensing light curve may not necessarily reveal the size of the individual emission clouds, the key value that is required to determine the physical state of the emission region, rather it may correspond to a particular hierarchy in a fractal structure. Current X-ray satellites can detect such fractal structure via the monitoring of gravitationally lensed quasars during a microlensing event, providing a test of high energy emission processes in quasars.
description: 6 pages, 2 figures. Accepted for publication in MNRAS
Engineering two-qubit mixed states with weak measurements
Creators: name: Kumar, Parveen
name: Snizhko, Kyrylo
name: Gefen, Yuval
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is known that protocols based on weak measurements can be used to steer quantum systems into pre-designated pure states. Here we show that weak-measurement-based steering protocols can be harnessed for on-demand engineering of $\textit{mixed}$ states. In particular, through a continuous variation of the protocol parameters, one can guide a classical target state to a discorded one, and further on, towards an entangled target state.
description: 6 pages, 4 figures, close to the published version
On Originality and Advancement of Publishing in the Clinical Psychological Field
Creators: name: Merlo, Emanuele Maria
Publisher: name: Mediterranean Journal of Clinical Psychology
Year: 2023
Subjects: Clinical Psychology; Editing; Originality; Psychological Field; Scientific advancement.

description: The commitment and role of clinical psychology refers to various fields of scientific interest.
description: Mediterranean Journal of Clinical Psychology, Vol 11, No 3 (2023)
A Natural Explanation of the VPOS from Multistate Scalar Field Dark Matter
Creators: name: Bernal, Tula
name: Matos, Tonatiuh
name: -Hernandez, Leonardo San.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations with the Gaia satellite have confirmed that the satellite galaxies of the Milky Way are not distributed as homogeneously as expected. The same occurs in galaxies such as Andromeda and Centaurus A, where satellites around their host galaxies have been observed to have orbits aligned perpendicular to the galactic plane of the host galaxy. This problem is known for the Milky Way as Vast Polar Structure (VPOS). The Scalar Field Dark Matter Field (SFDM), also known as Ultralight-, Fuzzy-, BEC-, and Axion-dark matter, proposes dark matter is a scalar field, which in the non-relativistic limit follows the Schrödinger equation coupled to the Poisson equation. Although the SF here is classical, the Schrödinger equation contains a ground and excited states as part of its nature. In this work, we show that such quantum character of the SFDM can naturally explain the VPOS observed in galaxies. By taking into account the finite temperature corrections for a complex, self-interacting SF at very early epochs of the Universe, we show that with the ground and first excited states in the Newtonian limit, we can fit the rotation curves of the host galaxies. With the best-fit parameters obtained, we can explain the VPOS. We do this with particular galaxies, such as the Milky Way, Andromeda, Centaurus A, and 6 other galaxies whose satellites have been observed. This result shows that the multistate SFDM is not distributed homogeneously around the galaxy, and therefore might explain the anisotropic distribution of the satellite galaxies. According to this result, this could be a general characteristic of the galaxies in the Universe. Finally, we also show how the scale of each galaxy depends on a parameter determined by the final temperature of the SF galactic halo under study. This might explain why different galaxies with SFDM give different values of the mass of the SF.
description: 30 pages, 10 figures
Impact of Natural Resource Conservation Policies on Household Consumption Around Zambian National Parks
Creators: name: Tembo, Gelson
name: Bandyopadhyay, Sushenjit
name: Pavy, Jean-Michel
name: Tembo, Gelson
name: Bandyopadhyay, Sushenjit
name: Pavy, Jean-Michel
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Security and Poverty
subject: International Development
subject: zambia
subject: food security
subject: policy
subject: natural resources
subject: conservation

description: Key Policy Points - Game Management Areas (GMAs) in Zambia aim to combine nature conservation with economic empowerment of rural households and communities. - We find evidence of consumption gains from living in GMAs and from participating in natural resource management through Community-Resource Boards (CRBs) and Village Action Groups (VAGs). - However, these benefits are unevenly distributed. Only GMAs with limited alternative livelihoods (Bangweulu and South Luangwa) exhibit significant consumption benefits. Also, the benefits accrue mainly to the relatively well off while the poor do not gain even if they participate. - Resources from ZAWA to CRBs seldom reach the VAGs. Richer, more educated community members participate at CRB or higher level while poorer households participate at VAG level. There is need to address impediments to effective participation by the majority of the community members. - Infrastructure development, which is more evident in Kafue and Lower Zambezi park systems, does not necessarily translate into household level consumption gains in the short run. Moreover, the observed infrastructure development in these areas cannot be attributed to the GMA institution.
Spectral convergence of non-compact quasi-one-dimensional spaces
Creators: name: Post, Olaf
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35P05; 58J50; 81V99

description: We consider a family of non-compact manifolds $X_\eps$ (``graph-like manifolds'') approaching a metric graph $X_0$ and establish convergence results of the related natural operators, namely the (Neumann) Laplacian $\laplacian {X_\eps}$ and the generalised Neumann (Kirchhoff) Laplacian $\laplacian {X_0}$ on the metric graph. In particular, we show the norm convergence of the resolvents, spectral projections and eigenfunctions. As a consequence, the essential and the discrete spectrum converge as well. Neither the manifolds nor the metric graph need to be compact, we only need some natural uniformity assumptions. We provide examples of manifolds having spectral gaps in the essential spectrum, discrete eigenvalues in the gaps or even manifolds approaching a fractal spectrum. The convergence results will be given in a completely abstract setting dealing with operators acting in different spaces, applicable also in other geometric situations.
description: some references added, still 36 pages, 4 figures
XXIII National Congress Italian Psychological Association Clinical and Dyamic Section Florence, 15th – 17th September 2023
Creators: name: Bocci Benucci, Sara
name: Padovani, Massimiliano
name: Di Gesto, Cristian
Publisher: name: Mediterranean Journal of Clinical Psychology
Year: 2023

description: Proceedings
description: Mediterranean Journal of Clinical Psychology, Vol 11, No 2 Suppl. (2023)
Land Use, Soil Loss and Sustainable Agriculture in Rwanda
Creators: name: Clay, Daniel C.
name: Lewis, Laurence A.
name: Clay, Daniel C.
name: Lewis, Laurence A.
Publisher: name: Unknown
Year: 1996
Subjects: subject: Land Economics/Use
subject: food security
subject: food policy
subject: Rwanda
subject: soil erosion
subject: cropping patterns
subject: slope
subject: sustainable agriculture

description: This paper demonstrates that there is relatively little association between field slope and crop cover in Rwanda, and examines the question of how this could be so in this highland African nation.
The Environmental Dependence of Galaxy Properties in the Local Universe: Dependence on Luminosity, Local Density, and System Richness
Creators: name: Tanaka, Masayuki
name: Goto, Tomotsugu
name: Okamura, Sadanori
name: Shimasaku, Kazuhiro
name: Brinkman, Jon
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the environmental dependence of star formation and the morphology of galaxies in the local universe based on a volume-limited sample (0.030
description: 47 pages, 16 figures, to appear in AJ
Podocerus fissipes Serejo 1995
Creators: name: Sir, Sally J.
name: White, Kristine N.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Podoceridae
Podocerus
Podocerus fissipes

description: Podocerus fissipes Serejo, 1995
Figs 29, 33 C
Podocerus fissipes Serejo, 1995 [1996]: 49–55, figs 1–3; Baldinger and Gable 2002: 11–19, figs 6–12; LeCroy 2011: 702, fig. 560.
Material examined.
Panama • 3–5.1 mm • 2 ♂, 5 ♀; Bocas del Toro, Hospital Bight, 9.3044°N, 82.1316°W, depth 1.5 m, among coral rubble; 7 Aug 2005; S. LeCroy leg.; GCRL 6672 • 3 ♂, 8 ♀, 2 juveniles; Bocas del Toro, Hospital Point, 9.3333°N, 82.2185°W, depth 11 m, from buoy scrapings; 26 June 2023; K. N. White leg.; USNM 1743975 • 9 ♂, 7 ♀, 1 juvenile; Bocas del Toro, Crawl Caye, 9.2475°N, 82.1290°W, depth 0–1 m, from buoy scrapings; 28 June 2023; K. N. White leg.; USNM 1743976.
Diagnosis.
Maxilla 2 inner and outer plates each with two rows of apical setae. Gnathopod 2 merus without robust setae; propodus with two robust setae at palmar angle. Uropods 1 and 2 without interramal spines. Telson apex truncate with two long and two short setae.
Distribution.
Brazil: Prainha in Arraial do Cabo, Rio de Janeiro; Santo Aleixo Island, Serinhaém, Pernambuco (Serejo 1995); British Virgin Islands: Guana (Baldinger and Gable 2002); U. S. A.: Biscayne Bay, Florida (LeCroy 2011); Bocas del Toro (present study).
Ecology and remarks.
Panamanian specimens agree with previous descriptions of Podocerus fissipes with the following exceptions: variation in dorsal carinae; gnathopod 2 with two robust setae (vs one robust seta in Serejo 1995 and LeCroy 2011). Baldinger and Gable (2002), however, also describe two robust setae on the gnathopod 2 propodus. The variation may be due to the size difference (Panama = 4.6 mm, B. V. I. = 3.0 mm, Brazil = 2.3 mm) or due to regional variation. Live specimens have orange coloration lining pereonites and are covered with orange speckles.
description: Published as part of Sir, Sally J. & White, Kristine N., 2025, Caribbean Amphipoda (Crustacea) of Panama. Part IV: parvorder Caprellidira, pp. 151-205 in ZooKeys 1234 on pages 151-205, DOI: 10.3897/zookeys.1234.145826