bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and simulation of an effective backup power supply for academic institutions in Nigeria: A case study of NDA postgraduate school
Authors: Airobaman Abel E. , Apeh Simon T. , Sanusi Usman A.
Published: May 2022

This research work is aimed to mitigate the adverse effect of numerous portable generators used in academic environments due to the unstable power supply experienced in Nigeria. Data for the study on the existing backup, availability hours from the national grid, and load demand for the area of study were obtained from the residents of the campus, facility managers, and Kaduna Distribution Company as the grid supplier from August 2017 to December 2020. The average load of the campus was obtained to be 80kW. These were used as a baseline to obtain the required size and quantity of material to generate the backup power needed. A total ampere-hour requirement of the battery to be used was obtained to be 4,278.07Ah considering the average battery depth of discharge of 80%. This resulted in a total number of cells required to be 134 considering a battery with a 200Ah rating and a nominal voltage rating of 48V. A solar photovoltaic (PV) system rating of 166.4kW is required to sufficiently charge the battery bank and also serve the load. This amounts to a minimum of 5 panels per string connected in series and 34 number panels per string connected in parallel based on which the total number of panels required summed up to 666. The inverter rating for the load was obtained to be 150 kVA with a total load of 100 kVA, an efficiency of 80%, and an average future expansion of 20 %. A diesel generator rating of 100kVA with a starting kVA rating of 113.64kVA is required to efficiently serve the load considering future expansion of 1.1 and operating efficiency of 80 %. These obtained parameters were simulated using MATLAB/Simulink to test the feasibility of the backup systems. The generation cost of each backup was calculated based on which solar PV with battery bank has an initial energy generation cost of 81.9 ₦/kWh and a future energy generation cost of 0.27 ₦/kWh while diesel generator has an initial energy generation cost of 1602.04 ₦/kWh and a future energy generation cost of 8.07 ₦/kWh as such, PV has the least energy cost and more economical for the academic environment.
A Descriptive Study To Assess The Knowledge And Practices Regarding Prevention Of Pre-eclampsia Among Antenatal Mothers In Selected Hospitals Of Moga, Punjab
Authors: Saxena Ravi Prakash
Published: May 2022

Aim of study to assess the knowledge and practices regarding prevention of pre-eclampsia among antenatal mothers. The objectives of study to assess the knowledge regarding prevention of pre-eclampsia, to assess the practices regarding prevention of pre-eclampsia, to find out co-relation between knowledge and practice regarding prevention of pre-eclampsia, to find out the relationship of knowledge score and practices with selected demographic variables and to develop information booklets on prevention of pre-eclampsia by selecting a sample of 100 antenatal mothers by simple random sampling technique. Maximum number 67 (67%) antenatal mothers had average knowledge followed by 24 (24%) antenatal mothers had below average knowledge and minimum number 9 (9%) antenatal mothers had good knowledge regarding prevention of preeclampsia. Maximum number 93 (93%) antenatal mothers had satisfactory practice and minimum number 7 (7%) antenatal mothers had unsatisfactory practice regarding prevention of preeclampsia. There was fair co-relation between knowledge and practices of antenatal mothers regarding pre-eclampsia
Developing Aerobic Granular Sludge With Sesame Like Biodegradable Support
Authors: Almonte-Saviñón Jose Leonel
Published: May 2022

Aerobic granular sludge (granules) is an innovative wastewater treatment, where dense biomass is in granular form. The problem of applying this technology at full scale is the granulation process time, which takes several months. In this paper, in an attempt to quicken this process, a biofilm was tested using several candidates as biodegradable support (BDS) for granulation. In this study, it was found that not only the granulation process was accelerated using sesame seeds as BDS (10, 15 and 21 days, compared to 2 months proposed by other studies), but also a new phenomenon was observed where new granules were generated from mature granules, enhancing the granulation process. This paper offers an enhanced option for granulation process.
Estrés laboral del personal de enfermería en una institución de tercer nivel de atención de la ciudad de México
Authors: Cortez-González Luis Carlos , Pantoja-Herrara Martín , Cortes-Montelongo Diana Berenice , Tello-García María Ascención , Nuncio-Domínguez José Luis
Published: May 2022

Introducción: Las enfermeras corren riesgos de sufrir estrés relacionado al trabajo, que genera problemas de retención y funcionamiento en el trabajo y el hogar. Existe un creciente interés del estrés en los profesionales relacionados con la atención sanitaria, el personal de enfermería no está exento de esta situación por lo cual, su salud es indispensable en la realización de sus actividades, ya que sin ella no puede realizar un trabajo adecuado. Objetivo General: Determinar el nivel de estrés laboral del personal de enfermería y su asociación con variables sociodemográficas de un hospital de tercer nivel de atención en la ciudad de México. Metodología: Diseño descriptivo, transversal, muestra 115 profesionales de enfermería de un Instituto Nacional de tercer nivel de atención, muestreo aleatorio estratificado. Instrumentos de medición: cedula de datos personales y laborales, Test de Estrés Laboral y Test de estrés de Hamilton. Resultados: promedio de edad fue 39.7 años (DE. 7.6 años) antigüedad laboral promedio 13.2 años (DE. 8.2 años), el test de Hamilton muestra que el 46.1% (f. 53) se encuentran sin estrés, en el test de estrés laboral modificado se muestra niveles de estrés medio en el 18.3% (f. 21) y estrés alto en el 10.4% (f. 47). Conclusiones: El personal de enfermería presentan bajo estrés laboral por lo que se incita a las autoridades de la institución a seguir con las estrategias de mejora continua donde se gestione la salud de sus trabajadores, de esta forma se puede garantizar la calidad de la atención a los usuarios.
Vías de comunicación coloniales en Veraguas, terrestre y marítima
Authors: Aguilar-Medina Sebastián Ariel
Published: May 2022

Este trabajo analiza la creación, evolución y funciones de las vías de comunicación en la época colonial en el actual territorio que comprende la Provincia de Veraguas. Se realizó una clasificación en etapas cronológicas, partiendo desde la primera visita al territorio de la actual Provincia de Veraguas, por el almirante Cristóbal Colón en 1503 y luego la fundación de los poblados a partir de finales del Siglo XVI.  Aquí se describen las conexiones terrestres y rutas marítimas utilizados en la época colonial, su importancia en la fundación y desarrollo de los poblados en las áreas estudiadas, el uso por el cual se crearon estas redes de comunicación y su estado actual. Para poder desarrollar el actual artículo, se analizaron una extensa documentación escrita, visita a los lugares, documentación gráfica, fotografías, planos inéditos, que fueron de gran ayuda para conocer estos elementos de estudio tan importante en la historia y la identidad de nuestro país, la Provincia, sus poblados y la sociedad veragüense.  Se elabora una base de datos gráfica y una propuesta teórica, que pueden ser utilizada como material didáctico y para futuras investigaciones de profesionales, estudiantes y para el uso cultural de toda la población panameña y a nivel internacional. También se detalla las posibles causas por las cuales muchas de estas vías de comunicación han caído en abandono y desuso, además de algunas propuestas para su aprovechamiento desde el punto de vista turístico, cultural y teórico.
Nichtrostende Stähle gezielt härten
Authors: Margraf Patrick
Published: May 2022

Wärmebehandlungen erhöhen die Verschleißbeständigkeit nichtrostender Stähle. Aufgrund verschiedener Einflüsse kann die Korrosionsbeständigkeit jedoch beeinträchtigt werden. Durch eine geeignete Stahlauswahl sowie durch angepasste, günstige Bearbeitungseinstellungen lassen sich diese Beeinträchtigungen weitgehend eliminieren.
Wie viele Getriebegänge für E-Antriebe in Fahrzeugen?/How many gears for electric drivelines in cars?
Authors: Höhn Bernd-Robert , Zhang Yingying
Published: May 2022

Inhalt Getriebe werden auch in elektrischen Antrieben von Fahrzeugen benötigt. Die Drehzahlen der E-Maschinen sind normalerweise viel höher als die Drehzahlen der anzutreibenden Räder, weil hohe Drehmomente auch hohe Gewichte bedeuten. Für den Leichtbau empfehlen sich also hohe Drehzahlen (heute ca. 12 – 18 Tsd. min-1). Insbesondere für Fahrzeuge mit kleineren el. Antriebsleistungen (P < 200 kW) werden schaltbare 2-Gang-Getriebe empfohlen. Hierdurch werden der Wirkungsgrad und dadurch auch die Reichweite deutlich gesteigert. In diesem Beitrag wird eine Methode für die Auslegung von schaltbaren 2-Gang-Getrieben für gegebene Fahrzeuge und vorgegebene Elektromotoren vorgestellt.
Symbolic number comparison and number priming do not rely on the same mechanism
Authors: Krajcsi Attila , Szűcs Tamás
Published: May 2022

In elementary symbolic number processing, the comparison distance effect (in a comparison task, the task is more difficult with smaller numerical distance between the values) and the priming distance effect (in a number processing task, actual number is easier to process with a numerically close previous number) are two essential phenomena. While a dominant model, the approximate number system model, assumes that the two effects rely on the same mechanism, some other models, such as the discrete semantic system model, assume that the two effects are rooted in different generators. In a correlational study, here we investigate the relation of the two effects. Critically, the reliability of the effects is considered; therefore, a possible null result cannot be attributed to the attenuation of low reliability. The results showed no strong correlation between the two effects, even though appropriate reliabilities were provided. These results confirm the models of elementary number processing that assume distinct mechanisms behind number comparison and number priming.
Effectiveness of Tango Intervention on Motor Symptoms in Patients with Parkinson's Disease: A Protocol for Systematic Review and Meta-Analysis
Authors:   Beijing Sport University School of Art, Wang Xiao , Shen Hong , Liang Yujie , Wang Yixin , Zhang Meiqi , Ma Hongtao
Published: May 2022

Review question / Objective: Parkinson's disease (PD) is a degenerative neurological disease caused by the loss of dopaminergic neurons in the pars compacta of the substantia nigra of the brain, resulting in lesions in the basal ganglia. The main motor symptoms of PD include resting tremor, rigidity, akinesia or bradykinesia and postural instability. As an exercise intervention based on musical accompaniment, tango dance has shown positive effects on the rehabilitation of motor symptoms in PD patients in recently. In this study, we systematically reviewed the efficacy of tango intervention in alleviating the motor symptoms of patients with PD. Condition being studied: Parkinson. Information sources: The following electronic databases will be searched: PubMed, Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science Core collection, and China National Knowledge Infrastructure Database (CNKI) and WanFang Database.
A regression analysis of discrete time competing risks data using a vertical model approach
Authors: Ndlovu Bonginkosi , Melesse Sileshi , Zewotir Temesgen
Published: May 2022

Over the years, the standard regression analysis method for discrete time competing risks data has been to model the data with discrete time cause-specific hazards. While a few continuous time competing risks models have been proposed in the literature, it is a well documented fact that these models are not appropriate for application in discrete time as is. The vertical regression model of Nicolaie et al. (2010) is the latest of these continuous time competing risks models. We reformulate this regression model for the purpose of application in discrete time. We demonstrate that the proposed model can easily be implemented by using existing software for discrete time models. We apply the proposed model together with some of the existing discrete time models to real discrete time competing risks data and find that the proposed model and these models compare favourably.
Pricing collateralised options in the presence of counterparty credit risk: An extension of the Heston–Nandi model
Authors: Venter Pierre J. , Maré Eben
Published: May 2022

In this paper, a closed-formexpression for a collateralised European option in the presence of counterparty credit risk and stochastic volatility is derived. The model is applied to Standard and Poor’s 500 index options. The model prices obtained are consistent with expectations.
ECONOMIC EFFICIENCY OF PIG BREEDING DEVELOPMENT IN CONDITIONS OF SATURATION OF THE DOMESTIC MARKET
Authors:   Federal Research Center for Animal Husbandry – VIZh named after academician L.K. Ernst, TIKHOMIROV A.I.
Published: May 2022

The article analyzes the current state of development of pig breeding in Russia and establishes the factors that determine the economic efficiency of the production and sale of pig meat. The role and importance of technological modernization in the intensification of the production of pig products and ensuring the expanded management of the industry are substantiated. Based on the analysis, measures are proposed to improve the economic efficiency and competitiveness of pig breeding.
GENETIC CHARACTERISTIC OF FEED CONVERSION AND FEEDING PERFORMANCE IN LANDRACE PIGS
Authors:   Federal Research Center for Animal Husbandry named after academy member L.K. Ernst, BELOUS A.A. , KONTE A.F. ,   Federal Research Center for Animal Husbandry named after academy member L.K. Ernst, OTRADNOV P.I. ,   Federal Research Center for Animal Husbandry named after academy member L.K. Ernst, RODIONOV A.N. ,   Federal Research Center for Animal Husbandry named after academy member L.K. Ernst, ZINOVIEVA N.A. ,   Federal Research Center for Animal Husbandry named after academy member L.K. Ernst
Published: May 2022

Purebred boars’ genetic potential realization and improvement currently is a very important aim in pigs breeding. In order to accomplish such an objective it is important to consider new selection criterions, and to improve pigs’ genomic selection programs, which are already developed. The main objective of our study was to analyze genetic and phenotypic correlation relationships of feeding performance traits and to conduct a full-genome associative research of feed conversion based on Landrace pigs breeding values.
Una tipología de las Áreas Económicas Locales de Argentina en base a perfiles sectoriales de coaglomeración territorial (2011-2018)
Authors: Niembro Andrés , Calá Carla Daniela , Belmartino Andrea
Published: May 2022

El estudio de la especialización productiva regional es clave para diseñar políticas de desarrollo territorial. Sin embargo, las medidas usualmente utilizadas no tienen en cuenta la interdependencia entre actividades y presentan otros problemas relacionados con el nivel de desagregación sectorial empleado. Para superar estas limitaciones, proponemos una nueva forma de definir la especialización regional a partir de técnicas de análisis multivariado, que son aplicadas a datos del total de empleo asalariado registrado en el sector privado de Argentina. Primero, conformamos un conjunto de perfiles sectoriales de coaglomeración territorial y, a partir de ellos, definimos una tipología empírica de Áreas Económicas Locales en función de sus patrones productivos. Los resultados muestran que la metodología propuesta ayuda a capturar interdependencias entre actividades, distinguir dentro de una categoría especializaciones cualitativamente diferentes y dar cuenta tanto del tipo de especialización como del grado de diversidad productiva regional.
Post-crisis Resilient Governance in Centro region (Portugal) after 2017 wildfires
Authors: Gonçalves Carlos , Borges Monique , Marques João
Published: May 2022

Governance systems, when addressing post-disaster action, play an important role in minimizing the community’s vulnerability in future disruptive events. The literature describes how post-disaster actions towards resistance-resilience measures are often implemented, shifting to adaptive-resilience approaches as a second concern, and disregarding resilience-transformative strategies. Two consecutive wildfires in the Centro Region (Portugal), in 2017, cut off access to the Services of General Interest (SGIs) and knocked off-balance the socioeconomic territorial structure and identity (the main impact was 116 mortal victims). In this paper, the media coverage of the phenomena during the 12 months following the disaster is analysed using a sample of 150 news articles published in two newspapers. The public discourses are indicative of the overall importance given to the impact and to the responses based on resistance-resilience measures. Moreover, the theoretical and practical challenges for the policy design and organization of the governance systems in post-disaster contexts is discussed.
Searches for Modulated γ-Ray Precursors to Compact Binary Mergers in Fermi-GBM Data
Authors: Stachie Cosmin , Dal Canton Tito , Christensen Nelson , Bizouard Marie-Anne , Briggs Michael , Burns Eric , Camp Jordan , Coughlin Michael
Published: May 2022

GW170817 is the only gravitational-wave event for which a confirmed γ-ray counterpart, GRB 170817A, has been detected. Here, we present a method to search for another type of γ-ray signal, a γ-ray burst precursor, associated with a compact binary merger. If emitted shortly before the coalescence, a high-energy electromagnetic (EM) flash travels through a highly dynamical and relativistic environment, created by the two compact objects orbiting each other. Thus, the EM signal arriving at an Earth observer could present a somewhat predictable time-dependent modulation. We describe a targeted search method for light curves exhibiting such a modulation, parameterized by the observer-frame component masses and binary merger time, using Fermi-GBM data. The sensitivity of the method is assessed based on simulated signals added to GBM data. The method is then applied to a selection of potentially interesting compact binary mergers detected during the second (O2) and third (O3) observing runs of Advanced LIGO and Advanced Virgo. We find no significant modulated γ-ray precursor signal associated with any of the considered events.
Coevolution of Broad Emission Lines and X-Ray Spectrum in Changing-look AGNs
Authors: Liu Hao , Wu Qingwen , Lyu Bing
Published: May 2022

Changing-look active galactic nuclei (CLAGNs) show the disappearance and reappearance of broad emission lines in a few years, which challenges the orientation-based AGN unification model. We reduce the X-ray data for five well-studied CLAGNs that show a strong change in broad emission lines in the past several decades. We find that the X-ray photon index, Γ, and the Eddington-scaled X-ray luminosity, L
2–10 keV/L
Edd, normally follow negative and positive correlations when the Eddington ratio is lower and higher than a critical value of ∼10−3. We find that the CLAGNs observed with broad Hβ emission lines stay in the positive part of the Γ–L
2–10 keV/L
Edd correlation, while the broad Hβ lines become weak or disappear in the anticorrelation part of the Γ–L
2–10 keV/L
Edd correlation, which suggests that the evolution of the broad lines should be correlated with the evolution of the underlying accretion process. We further find that the CLAGNs are consistent with the other different types of AGNs in the L
bol–L
bol/L
Edd correlation. These results support that the CLAGNs belong to a special stage of AGNs with a bolometric Eddington ratio ∼1%, where the broad emission lines are easily affected by the strong variation in ionization luminosity that is caused by the transition of accretion modes.
The GALAH Survey: A New Sample of Extremely Metal-poor Stars Using a Machine-learning Classification Algorithm
Authors: Hughes Arvind C. N. , Spitler Lee R. , Zucker Daniel B. , Nordlander Thomas , Simpson Jeffrey , Da Costa Gary S. , Ting Yuan-Sen , Li Chengyuan , Bland-Hawthorn Joss , Buder Sven , Casey Andrew R. , De Silva Gayandhi M. , D’Orazi Valentina , Freeman Ken C. , Hayden Michael R. , Kos Janez , Lewis Geraint F. , Lin Jane , Lind Karin , Martell Sarah L. , Schlesinger Katharine J. , Sharma Sanjib , Zwitter Tomaž ,   the GALAH Collaboration
Published: May 2022

Extremely metal-poor (EMP) stars provide a valuable probe of early chemical enrichment in the Milky Way. Here we leverage a large sample of ∼600,000 high-resolution stellar spectra from the GALAH survey plus a machine-learning algorithm to find 54 candidates with estimated [Fe/H] ≤−3.0, six of which have [Fe/H] ≤−3.5. Our sample includes ∼20% main-sequence EMP candidates, unusually high for EMP star surveys. We find the magnitude-limited metallicity distribution function of our sample is consistent with previous work that used more complex selection criteria. The method we present has significant potential for application to the next generation of massive stellar spectroscopic surveys, which will expand the available spectroscopic data well into the millions of stars.
Polarization from Aligned Dust Grains in the β Pic Debris Disk
Authors: Hull Charles L. H. , Yang 杨 Haifeng 海峰 , Cortés Paulo C. , Dent William R. F. , Kral Quentin , Li Zhi-Yun , Le Gouellec Valentin J. M. , Hughes A. Meredith , Milli Julien , Teague Richard , Wyatt Mark C.
Published: May 2022

We present 870 μm Atacama Large Millimeter/submillimeter Array polarization observations of thermal dust emission from the iconic, edge-on debris disk β Pic. While the spatially resolved map does not exhibit detectable polarized dust emission, we detect polarization at the ∼3σ level when averaging the emission across the entire disk. The corresponding polarization fraction is P
frac = 0.51% ± 0.19%. The polarization position angle χ is aligned with the minor axis of the disk, as expected from models of dust grains aligned via radiative alignment torques (RAT) with respect to a toroidal magnetic field (B-RAT) or with respect to the anisotropy in the radiation field (k-RAT). When averaging the polarized emission across the outer versus inner thirds of the disk, we find that the polarization arises primarily from the SW third. We perform synthetic observations assuming grain alignment via both k-RAT and B-RAT. Both models produce polarization fractions close to our observed value when the emission is averaged across the entire disk. When we average the models in the inner versus outer thirds of the disk, we find that k-RAT is the likely mechanism producing the polarized emission in β Pic. A comparison of timescales relevant to grain alignment also yields the same conclusion. For dust grains with realistic aspect ratios (i.e., s > 1.1), our models imply low grain-alignment efficiencies.
A Framework for Characterizing Transmission Spectra of Exoplanets with Circumplanetary Rings
Authors: Ohno Kazumasa , Fortney Jonathan J.
Published: May 2022

Recent observations revealed that several extremely low-density exoplanets show featureless transmission spectra. While atmospheric aerosols are a promising explanation for both the low-density and featureless spectra, there is another attractive possibility: the presence of circumplanetary rings. Previous studies suggested that rings cause anomalously large transit radii. However, it remains poorly understood how rings affect the transmission spectrum. Here, we provide a framework to characterize the transmission spectra of ringed exoplanets. We develop an analytical prescription to include rings in the transmission spectra for arbitrarily viewing geometries. We also establish a simple postprocessing model that can include the ring’s effects on precomputed ring-free spectra. The ring flattens the transmission spectrum for a wide range of viewing geometries, consistent with the featureless spectra of extremely low-density exoplanets. Near-future observations by the James Webb Space Telescope at longer wavelengths would be able to distinguish the aerosol and ring scenarios. We also find that rocky rings might cause a silicate feature at ∼10 μm if the ring’s optical depth is around unity. Thus, the ring’s spectral features, if detected, would provide tight constrains on the physical properties of exoplanetary rings. We also discuss the ring’s stability and suggest that thick rings are sustainable only at the equilibrium temperature of ≲300 K for the ring’s age comparable to Kepler planets. This might indicate the intrinsic deficit of thick rings in the Kepler samples, unless rings are much younger than the planets as suggested for Saturn.
Decayless Oscillations in Solar Coronal Bright Points
Authors: Gao Yuhang , Tian Hui , Van Doorsselaere Tom , Chen Yajie
Published: May 2022

Decayless kink oscillations of solar coronal loops (or decayless oscillations for short) have attracted great attention since their discovery. Coronal bright points (CBPs) are mini-active regions and consist of loops with a small size. However, decayless oscillations in CBPs have not been widely reported. In this study, we identified this kind of oscillations in some CBPs using 171 Å images taken by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. After using the motion magnification algorithm to increase oscillation amplitudes, we made time–distance maps to identify the oscillatory signals. We also estimated the loop lengths and velocity amplitudes. We analyzed 23 CBPs and found 31 oscillation events in 16 of them. The oscillation periods range from 1 to 8 minutes (on average about 5 minutes), and the displacement amplitudes have an average value of 0.07 Mm. The average loop length and velocity amplitude are 23 Mm and 1.57 km s−1, respectively. Relationships between different oscillation parameters are also examined. Additionally, we performed a simple model to illustrate how these subpixel oscillation amplitudes (less than 0.4 Mm) could be detected. Results of the model confirm the reliability of our data processing methods. Our study shows for the first time that decayless oscillations are common in small-scale loops of CBPs. These oscillations allow for seismological diagnostics of the Alfvén speed and magnetic field strength in the corona.
La corruption comme système de pouvoir en Algérie
Authors: Djerbal Daho
Published: May 2022

L’alliance de la classe-Etat et de l’oligarchie s’est structurée en véritable système ouvrant la voie à une corruption généralisée. Le système ne se résume plus à la seule existence de la rente pétrolière, ni à celle d’un État rentier vivant principalement de la fiscalité pétrolière. Il va finir par apparaître comme un système de régulation économique et politique liberticide et d’exclusion sociale.
Agroécologie
Authors: Delcourt Laurent
Published: May 2022

L’idée de « révolution verte » a refait surface dans les débats internationaux sur l’agriculture et le développement. Car elle fait le jeu des transnationales de l’agrobusiness et exacerbe les pressions sur les ressources, cette stratégie est contestée par les partisans d’un autre modèle d’agriculture, qui soit à la fois durable, performant et socialement juste. Associée au concept de souveraineté alimentaire, l’agroécologie répond précisément à ce triple défi.
Sport et mondialisation
Authors: McKinley Dale T. , Finat Camila , Leroy Aurélie
Published: May 2022

La Coupe du monde de football est le moteur d’un complexe d’accumulation rodé. La privatisation et la globalisation des acteurs a permis à la FIFA – au nom du sport et du développement – d’exploiter les pays hôtes et de se garantir, par tous les moyens, des bénéfices colossaux pour elle et ses partenaires commerciaux. Le dévoiement du sport utilisé comme bélier du capitalisme néolibéral appelle une remise en cause fondamentale du système.
L’urgence écologique vue du Sud
Authors: Hamouchene Hamza
Published: May 2022

L’extractivisme au Maghreb renforce l’intégration subordonnée de la région dans l’économie capitaliste mondiale. L’accumulation par dépossession y participe du pillage des ressources et de la dégradation de l’environnement. Les premières victimes de ces politiques tentent de s’y opposer, en articulant dans leurs luttes des revendications sociales et environnementales. Mais la voie vers un post-extractivisme juste et durable est semée d’embûches.
Decomposition of Socioeconomic Inequality in Cardiovascular Disease Prevalence in the Adult Population: A Cohort-based Cross-sectional Study in Northwest Iran
Authors: Pourfarzi Farhad , Zahirian Moghadam Telma , Zandian Hamed
Published: May 2022

Objectives: The incidence of cardiovascular disease (CVD) mortality is increasing in developing countries. This study aimed to decompose the socioeconomic inequality of CVD in Iran.Methods: This cross-sectional population-based study was conducted on 20 519 adults who enrolled in the Ardabil Non-Communicable Disease cohort study. Principal component analysis and multivariable logistic regression were used, respectively, to estimate socioeconomic status and to describe the relationships between CVD prevalence and the explanatory variables. The relative concentration index, concentration curve, and Blinder-Oaxaca decomposition model were used to measure and decompose the socioeconomic inequality.Results: The overall age-adjusted prevalence of CVD was 8.4% in northwest Iran. Multivariable logistic regression showed that older adults, overweight or obese adults, and people with hypertension and diabetes were more likely to have CVD. Moreover, people with low economic status were 38% more likely to have CVD than people with high economic status. The prevalence of CVD was mainly concentrated among the poor (concentration index, -0.077: 95% confidence interval, -0.103 to -0.060), and 78.66% of the gap between the poorest and richest groups was attributed to differences in the distribution of the explanatory variables included in the model.Conclusions: The most important factors affecting inequality in CVD were old age, chronic illness (hypertension and diabetes), marital status, and socioeconomic status. This study documented stark inequality in the prevalence of CVD, wherein the poor were more affected than the rich. Therefore, it is necessary to implement policies to monitor, screen, and control CVD in poor people living in northwest Iran.
Dynamically stable matching
Authors: Doval Laura
Published: May 2022

I introduce a stability notion,dynamic stability, for two‐sided dynamic matching markets where (i) matching opportunities arrive over time, (ii) matching is one‐to‐one, and (iii) matching is irreversible. The definition addresses two conceptual issues. First, since not all agents are available to match at the same time, one must establish which agents are allowed to form blocking pairs. Second, dynamic matching markets exhibit a form of externality that is not present in static markets: an agent's payoff from remaining unmatched cannot be defined independently of other contemporaneous agents' outcomes. Dynamically stable matchings always exist. Dynamic stability is a necessary condition to ensure timely participation in the economy by ensuring that agents do not strategically delay the time at which they are available to match.
The structure of equilibria in trading networks with frictions
Authors: Schlegel Jan Christoph
Published: May 2022

Several structural results for the set of competitive equilibria in trading networks with frictions are established: The lattice theorem, the rural hospitals theorem, the existence of side‐optimal equilibria, and a group‐incentive‐compatibility result hold with imperfectly transferable utility and in the presence of frictions. While our results are developed in a trading network model, they also imply analogous (and new) results for exchange economies with combinatorial demand and for two‐sided matching markets with transfers.
Monologues, dialogues, and common priors
Authors: Di Tillio A. , Lehrer E. , Samet D.
Published: May 2022

The main purpose of this paper is to provide a simple criterion enabling to conclude that two agents do not share a common prior. The criterion is simple, as it does not require information about the agents' knowledge and beliefs, but rather only the record of a dialogue between the agents. In each stage of the dialogue, the agents tell each other the probability they ascribe to a fixed event and update their beliefs about the event. To characterize dialogues consistent with a common prior, we first study monologues, which are sequences of probabilities assigned by a single agent to a given event in an exogenous learning process. A dialogue is consistent with a common prior if and only if each selection sequence from the two monologues comprising the dialogue is itself a monologue.
« Là où on nous attend le moins ». L’animal comme fiction d’investigation architecturale
Authors: Rouillard Dominique
Published: May 2022

L’article rend compte de six années de séminaire à l’ENSA Paris-Malaquais, de septembre 2015 à juin 2021, autour de la problématique d’un « autre animal » de l’architecture. Développée dans un projet de recherche sur le long terme, la problématique est introduite comme outil didactique de désacoutumance pour penser et théoriser l’architecture (ville, territoire) autant que comme initiation aux problématiques écologiques et environnementales : l’animal comme fiction théorique et surréelle d’investigation.Dans ce but, les étudiants et étudiantes sont placé.es dans la position inconfortable d’avoir à renoncer aux hypothèses déjà-là sur tout ce qui environne aujourd’hui l’animal dans le contexte de la « perte biodiversitaire », et qui progressivement atteignent les écoles d’architecture, et renoncer jusqu’au passé millénaire des rapports de l’architecture à l’animal. À cette condition, ils et elles pourront espérer rencontrer l’autre animal de l’architecture, « là où on les attend le moins ».
Infrastructures animales. Le cheval comme acteur de la transformation des territoires
Authors: Mercuriali Mathieu
Published: May 2022

La domestication des espèces animales et végétales a débuté au néolithique, il y a plus de 5 000 ans. Cet affranchissement du sauvage s’est accompagné d’une sédentarisation des humains et d’une organisation du territoire pour accueillir un nouveau rapport entre les espèces. L’article propose d’explorer l’organisation spatiale et nos modes de vie au regard du cas du cheval. Il s’agit ainsi d’explorer les relations des animaux à l’architecture à travers la domestication du cheval, un animal médiateur entre la notion de « nature » et celle de « culture », qu’il a transformé. Le cheval n’a pas été un outil, mais un acteur de la transformation des territoires, ce dont témoigne l’architecture. À travers ces échelles d’architecture et d’infrastructure, un nouveau regard sera porté sur l’organisation spatiale des sociétés humaines à travers sa relation aux équidés.
Factories of Banality
Authors: Issa Nadia , Tendera Paulina
Published: May 2022

An examination of the omnipresent relations of power within the art world, focused on marketing strategies and the process of identification and differentiation in the perception of Jeffs Koons's artworks, reveals a complex interest in Jeff Koons's personality. It shows the relationships of Koons artworks with the economy and identifies them as products of big-business transactions. It also explains how the art world produces brand equity. Such artwork is chosen to serve as a symbol of opulence and as the locus of capital. Identification, differentiation, the elite, and art commodification are the main themes explored. This is a reflection on the state of the contemporary art world.
An Integral Emergency Alert System for Mexico
Authors: Sardiñas Elizabet De Armas , Maruri José María Matías , Garduño Víctor García , Gaibor Andrés Cornejo
Published: May 2022

Mexico is a country prone to catastrophic events of seismic, vulcanological or meteorological origin, among others. For this reason, many organizations monitor in Mexico different areas to prevent catastrophes. The Emergency Alert Systems (EAS) advise about the advent of a possible catastrophic event to the population in general. This paper explores the EAS in Mexico in order to propose improvements. First, the characteristics of the existing Emergency Alert Systems in México are evaluated. As the broadcasting have traditionally been the main alert media for the population, the coverage of radio and television is studied in order to know whether it is enough to cover all the country. Finally, a new integral Emergency Alert System covering all the country is proposed.
BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems
Authors: Yeh Hen-Geul , Zhou Jun
Published: May 2022

It’s critical to design a robust wireless communication system that achieves an improved bit error rate (BER) in mobile channels. In this paper, a 2x2 space-time (ST) orthogonal frequency division multiplexing (OFDM) system is proposed with conjugate cancellation (CC) two-path transmission scheme. The 2x2 STCC-OFDM system features in the excellent inter-carrier interference (ICI) mitigation in the mobile channels with a better BER than that of a conventional 2x2 ST-OFDM system. Five orthogonal transforms are employed as the precoder to enhance the BER further, such as Zadoff-Chu transform (ZCT), slant transform (ST), discrete Hartley transform (DHT), Haar transform (HT), and Walsh–Hadamard transform (WHT). ZCT row wise precoder provide the lowest peak-to-average power ratio and good BER performance. Simulations demonstrate that the proposed STCC-OFDM systems are robust to various channel environments Although the STCC-OFDM systems improve BER with the cost of reducing bandwidth efficiency when compared to a ST-OFDM, they can be compensated by a higher QAM constellation size.
Small-Footprint Keyword Spotting for Controlling Smart Home Appliances Using TCN and CRNN Models
Authors: Alapati Hemalatha , Paolini Christopher , Chinara Suchismita , Sarkar Mahasweta
Published: May 2022

Smart homes feature automatic fire/smoke detection, voice-operated assets and appliances etc. More often, smart home appliances like lights, fans, etc., can be controlled through voice commands. Voice-operated devices like Alexa, Siri, and Google Assistant, are not new in the current age concerning voice command execution. However, working with these supports requires a global connection with the internet that costs time and bandwidth. Controlling home appliances need concise commands involving keywords on/off. Further, to operate the home appliances, bandwidth consumption for internet is not a wise idea. Through this paper, models based on Temporal Convolutional Networks (TCN) and Convolutional Recurrent Neural Networks (CRNN) have been studied for Keyword Spotting (KWS) by training models with keywords pronounced in different accents. The performance of these models is compared, and their ability to detect unknown words is studied. Finally, how these models are suitable for building Smart Home assistants to control home utilities with minimum bandwidth consumption is discussed.
Enhanced Reliable Communication Using Direct-Trust-Based GPSR Protocol in VANETs
Authors: Gupta Meenakshi , Gera Poonam
Published: May 2022

Vehicular Ad-hoc Network (VANET) is becoming a potential solution to improve traffic safety and efficiency by facilitating communication among vehicles via exchanging reliable messages. Therefore, reliable and authentic message delivery from legitimate vehicles is a prerequisite. But internal malicious vehicles may disrupt proper functioning by discarding or fabricating packets. For this objective, a computationally efficient direct trust-based model is proposed which evaluate vehicle behavior by verifying the correctness of communicated message even in sparse network situation. We ensure the reliability of each communicated message by secure path selection in Direct-trust-based GPSR routing protocol (DT-GPSR) incorporating trustworthy vehicle. Simulation and analyses show our model help legitimate vehicles to mitigate effect of malicious vehicle communicating false or bogus data to disrupt network.
The Use of Images in Online Learning
Authors: Bader Jason D. , Snelson Chareen , Lowenthal Patrick R. , Friesen Norm
Published: May 2022

Images can improve learning and performance. However, research suggests that many online educators and instructional designers lack the knowledge, skills, and abilities to effectively create and use images when designing online courses and instructional materials. Given this problem, we conducted a qualitative content analysis of images used within 20 different college courses to better understand how images are used in online courses. After creating a new image categorization, we coded 232 images. Results found that while only 27% of images in online courses were educational, other types of images can still serve important roles in online courses. The results were used to create a new framework for image use in online learning. We conclude the paper with recommendations that can help online educators and instructional designers select images for the online courses they design and teach.
Marketing Information and Marketing Intelligence
Authors: Mandal Pratap Chandra
Published: May 2022

Companies require understanding the needs, wants, and preferences of customers and generating relevant customer insights to serve them well. Customer insights can be generated only when companies have processes in place to collect marketing information and marketing intelligence. Companies collect marketing information from many and varied sources. They handle big data and extract insights. Companies manage marketing information with the help of marketing information systems. Marketing information systems help companies in assessment of information requirements, in developing the information, and in analyzing the information to generate customer insights. Companies collect competitive marketing intelligence to have a better understanding of competitors. Companies should adhere to ethical practices while collecting and analyzing marketing intelligence. Proper coordination and utilization of marketing information, marketing information systems, and marketing intelligence will help companies generate relevant customer insights, serve customers well, and achieve business excellence.
Challenges and Constraints Facing the Agricultural Extension System in Egypt
Authors: Mansour Tamer Gamal Ibrahim , Abdelazez Mahmoud Alaa , Eleshmawiy Khairy Hamed
Published: May 2022

Purpose: The research aimed to identify the important problems facing the agricultural extension system in Egypt. Research Method: A simple random sample was selected from the extension workers in Fayoum and Beheira governorates (196 respondents) Data collection was done from October 2020 to February 2021, using a questionnaire designed based on the framework of modernization and development of agricultural extension systems developed by FAO. Findings: The results indicated that the extension organization in Egypt suffers from aging and erosion (62.2% of the surveyed agricultural extension workers are over 46 years old), 58.7% of the surveyed Extension workers were not specialized in agricultural extension. the extension workers were not sufficiently satisfied with their work. As for the important problems facing extension work in Egypt, foremost of which was the problem centralization, lack of authority delegation, absence of institutional work, absence of funding sources, weakness of the operational budget, weakness of the academic programs before service, absence of adequate training opportunities, absence of a clear and integrative mechanism to link agricultural extension with scientific research institutions, in addition to the absence of coordination with colleges of agriculture and veterinary medicine, mass media, NGOs, and private sector could be identified. Research Limitation: This study was based on a small sample in two governorates. Therefore, policymakers should be careful to generalize the findings to a broad context. Originality/ Value: This study dealt with extension problems within the framework of modernization and development of agricultural extension systems developed by FAO, to provide officials with a vision of the most important problems and reform priorities.
Effect of Salicylic Acid and Calcium Chloride on Growth of Corn Under Water Stress Condition
Authors: Somtrakoon Khanitta , Chouychai Waraporn
Published: May 2022

Purpose: Oxidation stress occurs when plants are exposed to water stress and it limits the plant growth and yield. The application of salicylic acid (SA) and CaCl2 is expected to alleviate this stress and induce plant growth and yield in corn. Research Method: Corn was planted in two main plots, normal and drought irrigation regimes (three- and four-day water withholding, respectively), and each main plot was divided into three sub plots, that were no-application, application with 0.01 SA and 0.01 SA + 45 mM CaCl2 sections. A plant growth regulator was sprayed on the corn two times on days 20 (before water withholding begin) and 50. The corn height, shoot fresh weight and corn yield (ear weight, ear diameter, ear length, number of rows/ear and seeds/ row) were measured on day 65. Statistically significant differences between treatments were analyzed with a two-way ANOVA. Findings: Between days 25 – 60, the shoot length of the corn growing in the drought irrigation plot was higher than that in either normal irrigation plot (receiving plant growth regulator or not). On day 65, only the corn sprayed with SA shown similar shoot lengths between the different irrigation regimes. The ear diameter and weight of corn grown in the drought irrigation were better than under normal irrigation. SA application could induce shoot fresh weight and ear growth under normal irrigation, while the SA + CaCl2 application induced the ear diameter and ear weight in the drought irrigated plot. Originality/ Value: With these results, it is possible to use SA and CaCl2 to promote plant growth and yield in acidic soil
The physical and emotional health of South Korean mothers of preterm infants in the early postpartum period: a descriptive correlational study
Authors: Park Jiyun , Bang Kyung-Sook
Published: May 2022

Purpose: This study investigated the physical and emotional health of South Korean mothers of preterm infants in the early postpartum period.Methods: In this descriptive correlational study, the participants included 91 mothers of preterm infants who were admitted to the neonatal intensive care unit of a tertiary hospital in South Korea. Physical health status was measured using a self-reported questionnaire, postpartum depression using the Edinburgh Postnatal Depression Scale, anxiety using the State-Trait Anxiety Inventory, and guilt using a 4-item scale.Results: Fatigue had the highest score among mothers' physical health problems, followed by shoulder pain, nipple pain, neck pain. The average postpartum depression score was 11.02 points, and 44% of women had postpartum depression with a score of 12 or above. Postpartum depression significantly was correlated with physical health (r=.35, p=.001), anxiety (r=.84, p<.001), and guilt (r=.75, p<.001) and was significantly higher for women with multiple births, and preterm infants who required ventilator and antibiotic treatment. Anxiety also showed a significant difference according to preterm infants’ condition.Conclusion: The significant correlations between postpartum depression and physical health, anxiety, and guilt indicate a need for nursing interventions that provide integrated management of mothers’ physical and emotional health.