cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Efficient clustering techniques for big data
Creators: name: Al Ghamdi, Sami
Publisher: name: University of Reading
Year: 2018

description: Clustering is an essential data mining technique that divides observations into groups where each group contains similar observations. K-Means is one of the most popular and widely used clustering algorithms that has been used for over fifty years. The majority of the running time in the original K-Means algorithm (known as Lloyd’s algorithm) is spent on computing distances from each data point to all cluster centres to find the closest centre to each data point. Due to the current exponential growth of the data, it became a necessity to improve KMeans even further to cope with large-scale datasets, known as Big Data. Hence, the main aim of this thesis is to improve the efficiency and scalability of Lloyd’s K-Means. One of the most efficient techniques to accelerate K-Means is to use triangle inequality. Implementing such efficient techniques on a reliable distributed model creates a powerful combination. This combination can lead to an efficient and highly scalable parallel version of K-Means that offers a practical solution to the problem of clustering Big Data. MapReduce, and its popular open-source implementation known as Hadoop, provides a distributed computing framework that efficiently stores, manages, and processes large-scale datasets over a large cluster of commodity machines. Many studies introduced a parallel implementation of Lloyd’s K-Means on Hadoop in order to improve the algorithm’s scalability. This research examines methods based on triangle inequality to achieve further improvements on the efficiency of the parallel Lloyd’s K-Means on Hadoop. Variants of K-Means that use triangle inequality usually require extra information, such as distance bounds and cluster assignments, from the previous iteration to work efficiently. This is a challenging task to achieve on Hadoop for two reasons: 1) Hadoop does not directly support iterative algorithms; and 2) Hadoop does not allow information to be exchanged between two consecutive iterations. Hence, two techniques are proposed to give Hadoop the ability to pass information from an iteration to the next. The first technique uses a data structure referred to as an Extended Vector (EV), that appends the extra information to the original data vector. The second technique stores the extra information on files where each file is referred to as a Bounds File (BF). To evaluate the two proposed techniques, two K-Means variants are implemented on Hadoop using the two techniques. Each variant is tested against variable number of clusters, dimensions, data points, and mappers. Furthermore, the performance of various implementations of K-Means on Hadoop and Spark is investigated. The results show a significant improvement on the efficiency of the new implementations compared to the Lloyd’s K-Means on Hadoop with real and artificial datasets.
Dialogue posthume avec Alfred Gell
Creators: name: Heinich, Natalie
Publisher: name: Aisthesis. Pratiche, linguaggi e saperi dell’estetico
Year: 2012

description: Presented as an imaginary dialogue with the author of Art and Agency, this paper displays a number of methodological shared positions: the contextualist nature of his epistemology, his focus on relations rather than on objects, his sense of pragmatism, his proximity with the notion of “person-objects” such as developed by the author of the present paper, his attention to the meso-social level and, eventually, his neutral standing in front of research objects. In spite of a few disagreements, all these properties bring to light a convergence between Gell’s anthropological approach and the kind of sociological methodology presently practiced in certain trends of French sociology.
description: Aisthesis. Pratiche, linguaggi e saperi dell’estetico, Vol. 5 No. 1 (2012): Paul Valéry: strategie del sensibile
Impact of groundwater markets in peninsular India on water use efficiency: A Data Envelopment Analysis approach
Creators: name: Manjunatha, A.V.
name: Speelman, Stijn
name: Van Huylenbroeck, Guido
name: Chandrakanth, Mysore G.
name: Manjunatha, A.V.
name: Speelman, Stijn
name: Van Huylenbroeck, Guido
name: Chandrakanth, Mysore G.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Resource /Energy Economics and Policy
subject: water use efficiency
subject: groundwater markets
subject: Data Envelopment Analysis
subject: India

description: In the hard rock areas of India, overdraft of groundwater has led to negative externalities, increases costs of groundwater irrigation and causes welfare losses. Groundwater markets are slowly emerging as niche markets to improve water distribution and to mitigate water scarcity by stimulating more efficient use. A sample containing water sellers, water buyers and control farmers was collected to test the hypothesis of more efficient water use. The effect of groundwater market introduction on the efficiency of water use is studied using Data Envelopment Analysis (DEA). The calculated subvector efficiencies for water use show that water buyers use water most efficient. But also water sellers are more efficient in their water use than the control group. Differences in average efficiency between these groups are shown to be significant using a Kruskal-Wallis test. This finding confirms that groundwater markets can add to improving efficiency of water use. Moreover results indicate that the existence of groundwater markets offers access to groundwater to resource poor farmers, the opportunity to benefit from the improved agricultural productivity generated by irrigation. In the light of proposed changes in groundwater legislation and policies for improving water use efficiency these empirical results provide crucial information to policy makers.
Dynamic response functions of two-dimensional Dirac fermions with screened Coulomb and short-range interactions
Creators: name: Agarwal, M.
name: Mishchenko, E. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a screened Coulomb interaction between electrons in graphene and determine their dynamic response functions, such as a longitudinal and a transverse electric conductivity and a polarization function and compare them to the corresponding quantities in the short-range interaction model. The calculations are performed to all orders for short-range interaction by taking into account the self-energy renormalization of the electron velocity and using a ladder approximation to account for the vertex corrections, ensuring that the Ward identity (charge conservation law) is satisfied. Our findings predict a resonant response of interacting electron-hole pairs at a particular frequency below the threshold $qv=ω$ and further predict an instability for sufficiently strong interactions.
description: 12 pages, 3 figures
title: Изучение взаимодействия хлорамфеникола с сополимером малеинового ангидрида и поли(винилпиридинами)
Creators: name: Шевчук, Наталья
name: Тюрина, Татьяна
name: Кобзев, Сергей
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Изучено изменение поглощения хлорамфеникола в присутствии добавок поли(винилпиридинов) и/или сополимера малеинового ангидрида с винилацетатом в водно-этанольных растворах. Найдено, что сополимер малеинового ангидрида не оказывает влияния на поглощение хлорамфеникола, в то время как эквимолярная добавка поли 4 винилпиридина приводит к его росту. Показано изменение спектров тройных смесей хлорамфеникол сополимер : поли(винилпиридин), анализ которых с помощью разностных спектров выявил взаимодействие всех компонентов системы. Установлено связывание сополимера малеинового ангидрида с поли(винилпиридинами), максимум которого наблюдается при соотношении сополимер : поли(2 винилпиридин) = 1 : 1 и сополимер : поли(4 винилпиридин) = 2 : 1. Структура комплексов между полимерами была изучена методом PM3, показано образование кооперативных водородных связей.
NPLIC: A Machine Learning Approach to Piecewise Linear Interface Construction
Creators: name: Ataei, Mohammadmehdi
name: Bussmann, Markus
name: Shaayegan, Vahid
name: Costa, Franco
name: Han, Sejin
name: Park, Chul B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.2; I.3; G.0

description: Volume of fluid (VOF) methods are extensively used to track fluid interfaces in numerical simulations, and many VOF algorithms require that the interface be reconstructed geometrically. For this purpose, the Piecewise Linear Interface Construction (PLIC) technique is most frequently used, which for reasons of geometric complexity can be slow and difficult to implement. Here, we propose an alternative neural network based method called NPLIC to perform PLIC calculations. The model is trained on a large synthetic dataset of PLIC solutions for square, cubic, triangular, and tetrahedral meshes. We show that this data-driven approach results in accurate calculations at a fraction of the usual computational cost, and a single neural network system can be used for interface reconstruction of different mesh types.
On the Topology of Black Hole Event Horizons in Higher Dimensions
Creators: name: Helfgott, C.
name: Oz, Y.
name: Yanay, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In four dimensions the topology of the event horizon of an asymptotically flat stationary black hole is uniquely determined to be the two-sphere $S^2$. We consider the topology of event horizons in higher dimensions. First, we reconsider Hawking's theorem and show that the integrated Ricci scalar curvature with respect to the induced metric on the event horizon is positive also in higher dimensions. Using this and Thurston's geometric types classification of three-manifolds, we find that the only possible geometric types of event horizons in five dimensions are $S^3$ and $S^2 \times S^1$. In six dimensions we use the requirement that the horizon is cobordant to a four-sphere (topological censorship), Friedman's classification of topological four-manifolds and Donaldson's results on smooth four-manifolds, and show that simply connected event horizons are homeomorphic to $S^4$ or $S^2\times S^2$. We find allowed non-simply connected event horizons $S^3\times S^1$ and $S^2\times Σ_g$, and event horizons with finite non-abelian first homotopy group, whose universal cover is $S^4$. Finally, following Smale's results we discuss the classification in dimensions higher than six.
description: 12 pages, minor edits 27/09/05
Economic analysis of spatial preferences heterogeneity of water quality
Creators: name: Martin-Ortega, Julia
name: Brouwer, Roy
name: Berbel, Julio
name: Martin-Ortega, Julia
name: Brouwer, Roy
name: Berbel, Julio
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: water economics
subject: valuation
subject: Choice Experiment
subject: Spatial Heterogeneity
subject: Water Quality

description: The main objective of this study is to account for spatial preference variability in the economic valuation of water quality improvements in the river basin context. This is expected to be particularly relevant for the implementation of the European WFD, as it will involve spatially differentiated perceptions of the benefits of water quality changes. A choice experiment is developed based on maps to elicit welfare measures for water quality improvements across sub-basins in the Guadalquivir River Basin in Spain. Variation is introduced simultaneously in the spatial distribution of goods and services and their beneficiaries, for the accounting of spatial preference heterogeneity (i.e. people’s different valuation of changes in environmental good provision depending on where the changes take place in relation to where they live). According to our results, not accounting for spatial preference heterogeneity leads to an underestimation of welfare for water quality improvement when aggregating WTP values from sub-basins to the river basin as a whole.
“Der Artist Valéry” nella teoria estetica di Adorno
Creators: name: Matteucci, Giovanni
Publisher: name: Aisthesis. Pratiche, linguaggi e saperi dell’estetico
Year: 2012

description: This paper aims to outline the importance of Valéry with respect to some cornerstones of Adorno’s aesthetic theory as a negative-dialectical thought. Adorno’s concept of aesthetic experience finds in Valéry as an “Artist” (not simply as a “Künstler”) a sort of lieutenant: he helps to specify notions like “apparition”, “form”, “configuration”, and above all the idea of the aesthetic as a relation by which something happens in the field of human experience without being a determinate, or determinable, content of it.
description: Aisthesis. Pratiche, linguaggi e saperi dell’estetico, Vol. 5 No. 1 (2012): Paul Valéry: strategie del sensibile
Extended sedimentation profiles in charged colloids: the gravitational length, entropy, and electrostatics
Creators: name: Royall, C. P.
name: van Roij, R.
name: van Blaaderen, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We have measured equilibrium sedimentation profiles in a colloidal model system with confocal microscopy. By tuning the interactions, we have determined the gravitational length in the limit of hard-sphere-like interactions, and using the same particles, tested a recent theory [R.van Roij, J. Phys. Cond. Mat. 15, S3569, (2003)], which predicts a significantly extended sedimentation profile in the case of charged colloids with long-ranged repulsions, due to a spontaneously formed macroscopic electric field. For the hard-sphere-like system we find that the gravitational length matches that expected. By tuning the buoyancy of the colloidal particles we have shown that a mean field hydrostatic equilibrium description even appears to hold in the case that the colloid volume fraction changes significantly on the length scale of the particle size. The extended sedimentation profiles of the colloids with long-ranged repulsions are well-described by theory. Surprisingly, the theory even seems to hold at concentrations where interactions between the colloids, which are not modeled explicitly, play a considerable role.
title: The exhibition of political film and video
Creators: name: Kidner, Dan
Publisher: name: University of Reading
Year: 2018

description: In the 1970s an independent film culture was established in Britain. The filmmakers and institutions that constituted this distinct culture were a fragile coalition of activist filmmakers, proponents of structural film, artists exploring the specificity of the new medium of video, distributors, exhibitors and lobbying groups. This PhD by practice seeks to critically reflect on the historical narratives that have sutured this coalition. Across three essays questions about the nature of independence in 1970s British independent film culture, the influence of semiotic-psychoanalytic film theory through this period, and the merging of film and video cultures in the 1990s will be explored in relation to the exhibition of political film and video in the spaces of contemporary art. The PhD is presented as a "thesis as a collection of papers" in order to accommodate three essays written through the process of completing this period of doctoral research by practice. These essays will be augmented by an introduction that presents my practice as a curator in relation to my practice as a writer. In this introduction I make a claim for a new approach to the presentation of historical works of experimental film, video art and political cinema in the spaces of contemporary art, that take into account the use of archives in these presentations, and the role of the spectator. In particular I will focus on two recent large group exhibitions I have curated "The Inoperative Community" at Raven Row (December 2015 - February 2016) and "Rozdzielona Wsplnota - The Inoperative Community II" at Muzeum Sztuki w t6dz, Poland (May- August 2016), and one editorial project: a publication and DVD box set of the films Nightcleaners (1975) by the Berwick Street Film Collective and '36 to '77 (1978) by Marc Karlin, Jon Sanders, James Scott and Humphry Trevelyan.
Revisiting the Mazur bound and the Suzuki equality
Creators: name: Dhar, Abhishek
name: Kundu, Aritra
name: Saito, Keiji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Among the few known rigorous results for time-dependent equilibrium correlations, important for understanding transport properties, are the Mazur bound and the Suzuki equality. The Mazur inequality gives a lower bound, on the long-time average of the time-dependent auto-correlation function of observables, in terms of equilibrium correlation functions involving conserved quantities. On the other hand, Suzuki proposes an exact equality for quantum systems. In this paper, we discuss the relation between the two results and in particular, look for the analogue of the Suzuki result for classical systems. This requires us to examine as to what constitutes a complete set of conserved quantities required to saturate the Mazur bound. We present analytic arguments as well as illustrative numerical results from a number of different systems. Our examples include systems with few degrees of freedom as well as many-particle integrable models, both free and interacting.
description: 12 pages, 12 figures
Corpo, sensibilità ed esperienza: la riflessione di Valéry alla luce dell’estetica pragmatista
Creators: name: Crescimanno, Emanuele
Publisher: name: Aisthesis. Pratiche, linguaggi e saperi dell’estetico
Year: 2012

description: Body, sensibility and experience: Paul Valéry’s reflection and pragmatist aesthetic The pragmatist aesthetic of Dewey and Shusterman can be useful to understand the complexity of the Valéry’s thought: this paper aims to highlight a pragmatist attitude on the Valéry’s aesthetic through the links of the triad Corps, Esprit, Monde and underline the crucial role that the body and the senses play in experience.
description: Aisthesis. Pratiche, linguaggi e saperi dell’estetico, Vol. 5 No. 1 (2012): Paul Valéry: strategie del sensibile
A Review on Zinc Oxide, Zinc Sulfide and graphene oxide quantum dots: various synthetic methods and Biomedical applications
Creators: name: D, Nagajothi
Publisher: name: figshare
Year: 2020
Subjects: subject: 30201 Bioinorganic Chemistry
subject: FOS: Chemical sciences
subject: 30302 Nanochemistry and Supramolecular Chemistry

description: The present review explains the present status of various synthetic methods and Bioapplications of quantum dots of Zinc and Graphene. Nanotechnology keeps its vital role in identifying a disease, and then to control and cure it. In the process, the Quantum Dots such as Graphene Oxide (GO), Zinc Sulfide (ZnS) & Zinc Oxide (ZnO) are very useful in many applications. The variety of different shape and size of these quantum dots are synthesized by ecofriendly methods. The synthesized quantum dots are characterized by many analytical techniques like AFM, XRD, FTIR, UV-Visible, DSC, TGA, NMR, SEM, TEM, EDS, CCD & VSM. The preparations of these dots are defined and the characteristics of them are explained in detail to know about the variety of application methods in biomedical field. Hence, the aim of the article gives more scope to find out the synthesis, characterization and applications of these Quantum Dots.
First results from dynamical chirally improved fermions
Creators: name: Lang, C. B.
name: Majumdar, Pushan
name: Ortner, Wolfgang
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We simulate Quantum Chromodynamics in four Euclidean dimensions with two (degenerate mass) flavors of dynamical quarks. The Dirac operator is the so-called chirally improved operator that has been studied so far in quenched calculations. We now present results of an implementation with the Hybrid Monte Carlo (HMC) algorithm including stout smearing. Our results are from an 8^3x16 lattice with tadpole improved Luescher-Weisz gauge action. We present our estimate of the lattice spacing, the pi and rho meson masses and evidence for tunneling between different topological sectors.
description: LaTeX [PoS], 6 pages, 5 figures, 2 tables, talk presented at Lattice 2005 (chiral fermions)
Gendered Impact of Irrigated Rice Schemes’ Governance on Farmers’ Income, Productivity and Technical Efficiency in Benin
Creators: name: Kinkingninhoun-Medagbe, Florent M.
name: Diagne, Aliou
name: Agboh-Noameshie, Afiavi R.
name: Adegbola, Patrice Ygue
name: Kinkingninhoun-Medagbe, Florent M.
name: Diagne, Aliou
name: Agboh-Noameshie, Afiavi R.
name: Adegbola, Patrice Ygue
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Gender
subject: land distribution
subject: Rice
subject: technical efficiency
subject: productivity
subject: income

description: Collective actions groups have many advantages and are sometimes essential, yet they can reinforce or perpetuate inter-and intra-gender inequalities when their functioning is left entirely subject to internal community dynamics and they are not well managed. This is well illustrated by the case of Koussin-Lélé rice scheme in the central Benin. This paper apply inequality indices and frontier production function to data from a sample of male and women rice farmers to analyze the gender inequalities in access to land and the governance of the groups, and their gender-differentiated impacts on farmers' productivity, technical efficiency and income. The results show that women are particularly discriminated against with regards to access to land, with significant negative impacts on their productivities and incomes. However, this discrimination did not have a significant impact on technical efficiency.
Plasmonic Purcell Effect in Organic Molecules
Creators: name: Zhao, D.
name: Silva, R. E. F.
name: Climent, C.
name: Feist, J.
name: Fernández-Domínguez, A. I.
name: García-Vidal, F. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By means of quantum tensor network calculations, we investigate the large Purcell effect experienced by an organic molecule placed in the vicinity of a plasmonic nanostructure. In particular, we consider a donor-π bridge-acceptor dye at the gap of two Ag nanospheres. Our theoretical approach allows for a realistic description of the continua of both molecular vibrations and optical nanocavity modes. We analyze both the exciton dynamics and the corresponding emission spectrum, showing that these magnitudes are not accurately represented by the simplified models used up to date. By disentangling the molecule coupling to radiative and non-radiative plasmonic modes, we also shed light into the quenching phenomenology taking place in the system.
$J/ψ$ Gluonic Dissociation Revisited : II. Hydrodynamic Expansion Effects
Creators: name: Patra, B. K.
name: Menon, V. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We explicitly take into account the effect of hydrodynamic expansion profile on the gluonic breakup of $J/ψ$'s produced in an equilibrating parton plasma. Attention is paid to the space-time inhomogeneities as well as Lorentz frames while deriving new expressions for the gluon number density $n_g$, average dissociation rate $$, and $ψ$ survival probability $S$. A novel type of partial wave {\em interference} mechanism is found to operate in the formula of $$. Nonrelativistic longitudinal expansion fro small length of the initial cylinder is found to push the $S(p_T)$ graph above the no flow case considered by us earlier \cite{rev1}. However, relativistic flow corresponding to large length of the initial cylinder pushes the curve of $S(p_T)$ downwards at LHC but upwards at RHIC. This mutually different effect on $S(p_T)$ may be attributed to the different initial temperatures generated at LHC and RHIC.
description: 25 pages, 10 figures
title: Применение теплорассеивающих полимерных композитов для производства тепловых труб
Creators: name: Шергин, Степан
name: Карачинов, Владимир
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Приведен обзор теплорассеивающих полимерных композитов и их основных характеристик. Рассматриваются причины использования современных материалов в производстве пассивных систем обеспечения тепловых режимов. Особенностью полимерных композитов является схожесть с таким распространённым материалом для производства тепловых труб, как алюминий. Показан график влияния теплопроводности материала пластины на неравномерность ее температурного поля при точечном нагреве. Приведены преимущества полимеров перед алюминием, а также возможные положительные итоги использования таких полимеров в производстве для криогенных и низкотемпературных тепловых труб.
Direct detection of the kinetic Sunyaev-Zel'dovich effect in galaxy clusters
Creators: name: Tanimura, Hideki
name: Zaroubi, Saleem
name: Aghanim, Nabila
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the direct detection of the kinetic Sunyaev-Zel'dovich (kSZ) effect in galaxy clusters with a 3.5 sigma significance level. The measurement was performed by stacking the Planck map at 217 GHz at the positions of galaxy clusters from the Wen-Han-Liu (WHL) catalog. To avoid the cancelation of positive and negative kSZ signals, we used the large-scale distribution of the Sloan Digital Sky Survey (SDSS) galaxies to estimate the peculiar velocities of the galaxy clusters along the line of sight and incorporated the sign in the velocity-weighted stacking of the kSZ signals. Using this technique, we were able to measure the kSZ signal around galaxy clusters beyond 3R500. Assuming a standard beta-model, we also found that the gas fraction within R500 is fgas,500 = 0.12 +- 0.04 for the clusters with the mass of M500 ~ 1e14 Msun/h. We compared this result to predictions from the Magneticum cosmological hydrodynamic simulations as well as other kSZ and X-ray measurements, most of which show a lower gas fraction than the universal baryon fraction for the same mass of clusters. Our value is statistically consistent with results from the measurements and simulations and also with the universal value within our measurement uncertainty.
description: 11 pages, 8 figures, accepted for publication by A&A
ARTIFICIAL INTELLIGENCE INTEGRATION AS CORRELATE OF IMPROVED LEADERSHIP DECISION-MAKING IN PUBLIC SECONDARY SCHOOLS IN ANAMBRA STATE
Creators: name: Ezema, Getrude, Chinonso
name: Ekwe, Ngozika, Ijeoma
Publisher: name: SADI Journal
Year: 2025
Subjects: Artificial Intelligence (AI)
School
Leadership
Decision-Making

description: The study sought to determine the relationship between artificial intelligence integration and improved leadership decision making in public secondary schools in Anambra State. One research question guided the study and one null hypothesis was tested at 0.05 level of significance. The correlational research design was adopted for the study and the population of the study comprised 267 public secondary school students in Anambra State. Two structured validated questionnaires were used for data collection. The instruments yielded co-efficient values of 0.88 and 0.90 for QPAII and QISLDM respectively.  Pearson Product Moment Correlation statistics was used to answer the research question and test the hypothesis. Finding of the study revealed that a high positive relationship exists between artificial intelligence integration and improved leadership decision-making in public secondary schools in Anambra State. Findings also showed that significant relationship between the artificial technology integration and improved leadership decision-making in public secondary schools in Anambra State. The researchers conclude based on these findings that the integration of AI would improve leadership decision-making in public secondary schools in Anambra State. Based on this conclusion, the researchers recommended among others, that the Anambra State Ministry of Education in conjunction with the Post Primary Schools Service Commission (PPSSC) should prioritise the integration of artificial intelligence tools to assist school leaders in making data-driven decisions in public secondary schools.
The Impact of Drought on Household Food Security in the Limpopo Basin of Semi Arid Southern Africa: The Case of Kgatleng District in Botswana
Creators: name: Acquah, Benjamin K.
name: Acquah, Benjamin K.
Publisher: name: Unknown
Year: 2008
Subjects: Agricultural and Food Policy
Food Security and Poverty

description: The Limpopo Basin is important to Botswana’s agriculture in terms of its land area of 80118 square kilometers. Climatic conditions in the Basin have ranged from droughts to floods in some years. The semi-arid nature of the Basin with the resultant low crop yields under rain-fed conditions has meant that communities in the area have adapted various strategies with regard to their access to food. These coping strategies are likely to undergo severe strains during periods of extreme weather patterns such as droughts. A household survey was conducted in two villages of Kgatleng District within the Basin in February 2005 with the objective of studying the coping strategies of selected households during drought in order to improve on coping mechanisms of communities in the Basin. The numbers of households selected by simple random sampling for study in the two villages were 61 and 45, respectively. The findings of the study indicated that during the drought in 2004 respondents’ sources of supplies were the shops, crop production and government provision. Coping mechanisms of households and differences in coping strategies in the two villages have been highlighted. The study recommends, among others, that the measures already in place to provide food security for households in drought prone areas in the Basin and in Botswana in general, need to be strengthened to ensure that households’ vulnerability to food insecurity during periods of climate change such as drought is minimized.
Rural Household Labour Demand, Contract Choice, Hoarding Cost and Poverty: Evidence from Western Kenya
Creators: name: Gathungu, E.
name: Musyoka, M.P.
name: Gathungu, E.
name: Musyoka, M.P.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Environmental Economics and Policy
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: Labor and Human Capital
subject: Land Economics/Use
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Contracts
subject: Kenya
subject: Labour
subject: Policy

description: This study determines the factors that influenced contract choice, labour demand and examines the existence of labour hoarding practice in Western region of Kenya. Data from Egerton University’s Tegemeo Institute of Agricultural Policy and Development was used for the analysis.. A two step Heckman model was employed to estimate the extent of engagement in daily and semi-permanent contracts conditional on choice of contract. Results from the study show that casual and semi-permanent contracts are substitutes. Family labour negatively influences engagement in daily and semi-permanent contracts hence it is a substitute to the two forms of the contracts. Increase in wages paid to casual contracts is negative and significant to the extent of daily contract engagement but positive and significant to semi-permanent contracts supporting the substitutability of daily contracts for semi-permanent contracts. Methods and costs of farm preparation are significant in influencing the choice and demand for any type of contracts. The proxy variable for hoarding costs is significant and positive indicating that there are hoarding costs incurred in the maintaining a steady pool of labour within the farm. From the results the relatively asset poor farmers engage in the wage high daily contracts to avoid incurring hoarding costs as indicated by the dummy denoting poverty level. However, to avoid uncertainty during peak periods semi-permanent contracts are highly employed by the asset poor farmers. From the results, farmers willing to minimize hoarding costs may find themselves substituting family labour for daily contracts or in absence of family labour, semi-permanent contracts for daily contracts.
Additional file 5 of Workplace gender-based violence and associated factors among university women in Enugu, South-East Nigeria: an institutional-based cross-sectional study
Creators: name: Olaoluwa Samson Agbaje
name: Chinenye Kalu Arua
name: Umeifekwem, Joshua Emeka
name: Umoke, Prince Christian Iheanachor
name: Chima Charles Igbokwe
name: Tochi Emmanuel Iwuagwu
name: Cylia Nkechi Iweama
name: Eyuche Lawretta Ozoemena
name: Obande-Ogbuinya, Edith N.
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy

description: Additional file 5: STROBE Checklist.
Crystal field model simulations of magnetic response of pairs, triplets and quartets of Mn$^{3+}$ ions in GaN
Creators: name: Sztenkiel, D.
name: Gas, K.
name: Domagala, J. Z.
name: Hommel, D.
name: Sawicki, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A ferromagnetic coupling between localized Mn spins was predicted in a series of \textit{ab initio} and tight binding calculations and experimentally verified for the dilute magnetic semiconductor Ga$_{1-x}$Mn$_x$N. In the limit of small Mn concentrations, $x \lesssim 0.01$, the paramagnetic properties of this material were successfully described using a single ion crystal field model approach. In order to obtain the description of magnetization in (Ga,Mn)N in the presence of interacting magnetic centers, we extend the previous model of a single substitutional Mn$^{3+}$ ion in GaN by considering pairs, triplets and quartets of Mn$^{3+}$ ions coupled by a ferromagnetic superexchange interaction. Using this approach we investigate how the magnetic properties, particularly the magnitude of the uniaxial anisotropy field, change as the number of magnetic Mn$^{3+}$ ions in a given cluster increases from 1 to 4. Our simulations are then exploited in explaining experimental magnetic properties of Ga$_{1-x}$Mn$_x$N with $x \cong 0.03$, where the presence of small magnetic clusters gains in significance. As a result the approximate lower and upper limits for the values of exchange couplings between Mn$^{3+}$ ions in GaN, being in nearest neighbors $J_{\mathrm{nn}}$ and next nearest neighbors $J_{\mathrm{nnn}}$ positions, respectively, are established.
description: 14 pages, 6 figures
ОЦЕНКА УРОВНЯ РАЗВИТИЯ МАРКЕТИНГОВОЙ ДЕЯТЕЛЬНОСТИ МАЛОГО ПРЕДПРИНИМАТЕЛЬСТВА В УЗБЕКИСТАНЕ
Creators: name: Ражабова, Умида
Publisher: name: Zenodo
Year: 2024

description: в тезисе рассматриваются изменения в сфере малого бизнеса в Узбекистане за последние годы. Обсуждается значение маркетинга в развитии бизнеса. Подчеркивается необходимость интеграции стратегий для достижения устойчивого роста, а также ключевые направления для будущего развития сектора.
The Prevalence of Under-Nourished Child Obese Mother Phenomenon in Rural Areas: Evidence from Central Province of Kenya
Creators: name: Mburu, John G.
name: Okello, Julius Juma
name: Mburu, John G.
name: Okello, Julius Juma
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: child
subject: Kenya
subject: mother
subject: nutrition

description: Attainment of nutritional security is a major focus of the Millennium Development Goals. Despite efforts, Sub-Saharan Africa countries are yet to make significant progress in becoming nutritionally secure. Over the years, maternal obesity and child under-nutrition have concurrently been on the increase. The rise in obesity and child under-nutrition is attributed to, among others, urbanization-driven shifts in eating habits and lifestyle, changes in purchasing power, food assistance and stress-related medical conditions. Studies in Asia and Latin America have associated co-existence of adult obesity and child under-nutrition with urban areas. In this paper we examine the prevalence of child under-nutrition and mother obesity in rural Kenya. We find that 22 per cent of households with undernourished children have mothers that are obese. The paper also find a positive association between wealth, education and woman status and the existence of undernourished child obese mother phenomenon in the same household. The policy implication of this double burden problem is that interventions aimed at solving child malnutrition need to be targeted.
Data-driven Modeling of Rotating Detonation Waves
Creators: name: Mendible, Ariana
name: Koch, James
name: Lange, Henning
name: Brunton, Steven L.
name: Kutz, J. Nathan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The direct monitoring of a rotating detonation engine (RDE) combustion chamber has enabled the observation of combustion front dynamics that are composed of a number of co- and/or counter-rotating coherent traveling shock waves whose nonlinear mode-locking behavior exhibit bifurcations and instabilities which are not well understood. Computational fluid dynamics simulations are ubiquitous in characterizing the dynamics of RDE's reactive, compressible flow. Such simulations are prohibitively expensive when considering multiple engine geometries, different operating conditions, and the long-time dynamics of the mode-locking interactions. Reduced-order models (ROMs) provide a critically enabling simulation framework because they exploit low-rank structure in the data to minimize computational cost and allow for rapid parameterized studies and long-time simulations. However, ROMs are inherently limited by translational invariances manifest by the combustion waves present in RDEs. In this work, we leverage machine learning algorithms to discover moving coordinate frames into which the data is shifted, thus overcoming limitations imposed by the underlying translational invariance of the RDE and allowing for the application of traditional dimensionality reduction techniques. We explore a diverse suite of data-driven ROM strategies for characterizing the complex shock wave dynamics and interactions in the RDE. Specifically, we employ the dynamic mode decomposition and a deep Koopman embedding to give new modeling insights and understanding of combustion wave interactions in RDEs.
description: 17 pages, 12 figures
Heterogeneous Impacts Of Cooperatives On Smallholders’ Commercialization Behavior: Evidence From Ethiopia.
Creators: name: Bernard, Tanguy
name: Gabre-Madhin, Eleni Z.
name: Taffesse, Alemayehu Seyoum
name: Bernard, Tanguy
name: Gabre-Madhin, Eleni Z.
name: Taffesse, Alemayehu Seyoum
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies

description: This paper examines the impact of marketing cooperatives on smallholder commercialization of cereals using detailed household data in rural Ethiopia. We use the strong government role in promoting the establishment of cooperatives to justify the use of propensity score matching in order to compare households that are cooperative members to similar households in comparable areas without cooperatives. The analysis reveals that while cooperatives obtain higher prices for their members, they are not associated with a significant increase in the overall share of cereal production sold commercially by their members. However, these average results hide considerable heterogeneity in the impact across households. In particular, we find smaller farmers tend reduce their marketed output as a result of higher prices, while the opposite is true for larger farmers. JEL Classification: Q13, O12
Seesaw induced electroweak scale, the hierarchy problem and sub-eV neutrino masses
Creators: name: Atwood, David
name: Bar-Shalom, Shaouly
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe a model for the scalar sector where all interactions occur either at an ultra-high scale L_U ~ 10^{16}-10^{19} GeV or at an intermediate scale L_I ~ 10^{9}-10^{11} GeV. The interaction of physics on these two scales results in an SU(2) Higgs condensate at the electroweak (EW) scale, L_{EW}, through a seesaw-like Higgs mechanism, L_{EW} ~ L_I^2/L_U, while the breaking of the SM SU(2)XU(1) gauge symmetry occurs at the intermediate scale L_I. The EW scale is, therefore, not fundamental but is naturally generated in terms of ultra-high energy phenomena and so the hierarchy problem is alleviated. We show that the class of such ``seesaw Higgs'' models predict the existence of sub-eV neutrino masses which are generated through a ``two-step'' seesaw mechanism in terms of the same two ultra-high scales: m_nu ~ L_I^4/L_U^3 ~ L_{EW}^2/L_U. The neutrinos can be either Dirac or Majorana, depending on the structure of the scalar potential. We also show that our seesaw Higgs model can be naturally embedded in theories with tiny extra dimensions of size R ~ 1/L_U ~ 10^{-16} fm, where the seesaw induced EW scale arises from a violation of a symmetry at a distant brane; in particular, in the scenario presented there are 7 tiny extra dimensions.
description: latex, 25 pages, no figures. Version 2 is a shorter version (as accepted in EPJC), not including the discussion on the heavy seesaw Higgs model
THE ROLE AND POSITION OF INTERNATIONAL INVESTMENT LAW WITHIN THE FRAMEWORK OF INTERNATIONAL LAW
Creators: name: Rahmonov, Jaloliddin
Publisher: name: Zenodo
Year: 2024

description: International Investment Law (IIL) has emerged as a critical component of the contemporary international legal framework. This paper explores the role and position of IIL within the broader context of international law, examining its unique characteristics, sources, and evolving principles.
A Framework for Hadronic Rescattering in pp Collisions
Creators: name: Sjöstrand, Torbjörn
name: Utheim, Marius
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, a framework for hadronic rescattering in the general-purpose Pythia event generator is introduced. The starting point is the recently presented space-time picture of the hadronization process. It is now extended with a tracing of the subsequent motion of the primary hadrons, including both subsequent scattering processes among them and decays of them. The major new component is cross-section parameterizations for a range of possible hadron-hadron combinations, applicable from threshold energies upwards. The production dynamics in these collisions has also been extended to cope with different kinds of low-energy processes. The properties of the model are studied, and some first comparisons with LHC pp data are presented. Whereas it turns out that approximately half of all final particles participated in rescatterings, the net effects in pp events are still rather limited, and only striking in a few distributions. The new code opens up for several future studies, however, such as effects in pA and AA collisions.
description: 61 pages, 24 figures, 10 tables
The K-matrix approach to the Delta - resonance mass splitting and isospin violation in low-energy pi-N scattering
Creators: name: Gridnev, A. B.
name: Horn, I.
name: Briscoe, W. J.
name: Strakovsky, I. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The experimental data on pi N scattering in the elastic energy region T_pi < 250 MeV are analyzed within the multichannel K-matrix approach with effective Lagrangians. Isospin invariance is not assumed in this analysis and the physical values for masses of the involved particles are used. The corrections due to pi^+- pi^0 and p-n mass differences are calculated and found to be in a reasonable agreement with the NORDITA results. Analysis shows the good description of the all experimental observables. From the data, new values for mass and width of the Delta^0 and Delta^{++} resonances were obtained. The isospin symmetric version gives phase shifts values close to the new solution for the pi-N elastic scattering amplitude FA02 by the GW group based on the latest experimental data. Our analysis leads to a considerably smaller < 1% isospin violation in the energy interval T_pi ~ 30-70 MeV as compared to 7% in some older analyses, however, it does confirm recent calculations based on chiral perturbation theory.
description: 13 pages, 8 figures, Phys. At. Nucl. and Yad. Fiz.(2005)
Necessity of Combining Mutually Incompatible Perspectives in the Construction of a Global View: Quantum Probability and Signal Analysis
Creators: name: Aerts, Sven
name: Aerts, Diederik
name: Schroeck, Franklin E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The scientific fields of quantum mechanics and signal-analysis originated within different settings, aimed at different goals and started from different scientific paradigms. Yet the development of the two subjects has become increasingly intertwined. We argue that these similarities are rooted in the fact that both fields of scientific inquiry had to deal with finding a single description for a phenomenon that yields complete information about itself only when we consider mutually incompatible accounts of that phenomenon.
description: 21 pages, 2 figures