bluuebunny/crossref_metadata_2025 huggingface dataset:
Políticas educativas y calidad de la educación en básica secundaria: tendencias investigativas
Authors: Martínez Arteaga Carlos Mario , Herrera Jara Leidy Esmeralda
Published: February 2023

Las políticas educativas tienen la finalidad de evaluar la relación entre la educación y la política, asumidas como los programas y actividades que estructura y ejecutan las entidades del Estado con la finalidad de superar las necesidades sociales de la educación, constituyéndose en un conjunto de técnicas y procedimientos de la política general que tiene propósitos académicos, es decir, los principios, reglas y directrices que orientan la acción formativa en el contexto regional y nacional. Por tanto, se definió como objetivo el presente artículo analizar las tendencias investigativas relacionadas con las políticas educativas y la calidad de la educación básica secundaria. Metodológicamente se fundamentó en un análisis documental cualitativo. Se concluyó que Las políticas públicas educativas muestran las concepciones pedagógicas y didácticas que las sustentan, sin embargo, estas van evolucionando de modelos gramaticales a modelos comunicativos y cognitivos los cuales están asociados a las apuestas internas de cada país y a las reestructuraciones implementadas en concordancia con sus pretensiones. Pueden ser analizadas desde los denominados planes de desarrollo; la planificación de su desarrollo parte de diagnósticos y principalmente problemas que se encuentran dentro del contexto económico, social, ambiental, cultural y político. La calidad educativa busca fortalecer el desarrollo institucional, que representa la necesidad actual de difundir una serie de posibilidades que tienen los directivos, es decir, el garante del mejor camino para el desempeño de sus funciones gerenciales y académicas
Recorrido histórico e investigativo sobre liderazgo transformacional del directivo docente orientado al mejoramiento del clima laboral
Authors: Benítez Romero Erly Nerly , Herrera Jara Leidy Esmeralda
Published: February 2023

El liderazgo debe fundamentarse en la influencia idealizada, estimulación inspiradora, estimulación intelectual y el respecto intelectual, a su vez, el líder debe ser coherente entre lo que manifiesta y las estrategias que implementa, logrando con esto una mejor comunicación y transmisión de ideas, objetivos y metas a conseguirse. El liderazgo posibilita alcanzar los objetivos planeados mediante la motivación de todos los docentes de la institución educativa, así como a través del diseño de estrategias que posibiliten lograr las metas propuestas de manera eficaz y eficiente. Por tanto, se definió como objetivo del presente artículo reflexionar en torno a la perspectiva histórica e investigativa sobre el liderazgo transformacional del directivo docente orientado al mejoramiento del clima laboral. La realización del articulo asumió una metodología cualitativa, desde un análisis documental. Se concluyó que el liderazgo transformacional está relacionado con la comunicación asertiva como mecanismo de entendimiento y comprensión para trabajar en pro de unos mismos objetivos. El liderazgo transformacional esta intrínsecamente relacionado con la dimensión cognitiva, afectiva y conductual de los estudiantes convirtiéndose en un mecanismo expedito para la optimización de la gestión de los procesos escolares. El clima laboral en la escuela está constituido por diversos elementos como lo son la autorización, el involucramiento laboral, la supervisión, la comunicación y las condiciones laborales, lo cual está asociado con la satisfacción de los docentes y el desempeño de los mismos. También influyen significativamente en el desempeño de los docentes, toda vez que los aspectos vinculados al ambiente de trabajo están directamente relacionados al funcionamiento de procesos y optimización de resultados
Gestión de la convivencia escolar como apoyo a la administración educativa: un análisis desde los fundamentos teóricos
Authors: Hoyos Hernández Yadis Ester , Herrera Jara Leidy Esmeralda
Published: February 2023

La convivencia escolar es el resultado de los procesos donde tienen prelación las distintas interacciones y comunicaciones que se llevan a cabo entre los integrantes del proceso de enseñanza aprendizaje, donde se resaltan habilidades y destrezas como el liderazgo, la toma de decisiones, la distribución del poder, el tratamiento a circunstancias conflictivas y el clima escolar. Por tanto, se definió como objetivo analizar los fundamentos teóricos que sustentan la gestión de la convivencia escolar como apoyo a la administración educativa, resaltando las diferentes posiciones conceptuales que suscitan sobre esta temática. Metodológicamente se fundamentó en un análisis documental cualitativo, el cual hace referencia a un proceso de recuperación, que responde a los requerimientos informativos de los interesados relacionados con conocer primero, lo que otros investigadores han realizado sobre un tema específico y segundo las consideraciones sobre dichas investigaciones. Se concluyó que uno de los elementos esenciales en la construcción de una convivencia escolar armónica es la autonomía y participación de los estudiantes, la cual fomenta e incentiva la reflexión e intervención activa y responsable de los alumnos en los procesos que se desarrollan al interior de las instituciones educativas. Por ello, es esencial que las instituciones promuevan elementos fundamentales asociados con la confianza con relación a la capacidad de los alumnos para llevar a cabo procesos reflexivos, tomar decisiones, afrontar los conflictos de forma pacífica y asumir responsabilidades, teniendo en cuenta que es importante tanto la individualidad como el trabajo en equipo.
Mediaciones tecnológicas en educación ambiental. Análisis desde la perspectiva teórica
Authors: Piedrahita Hoyos Kilia , Torres López Alexaivy Del Valle
Published: February 2023

La educación ambiental se considera un problema para los estudiantes, debido a sus dificultades para analizar e interpretar los contenidos temáticos de esta área. A esto se le suma, que en los contextos educativos asigna la responsabilidad de esta problemática a los estudiantes, sin considerar a los docentes y sus metodologías de enseñanza. No obstante, las TIC (Tecnologías de la Información y Comunicación) han transformado la manera en que se accede a la información, debido a que la articulación de estas en el contexto escolar no se limita solo a la infraestructura, sino que es necesario considerar a los docentes y la manera cómo pueden integrarlas a sus prácticas pedagógicas para generar mejores ambientes de aprendizajes. Por tanto, el presente artículo tiene como objetivo analizar las mediaciones tecnológicas en educación ambiental desde los fundamentos teóricos que lo sustentan. Fundamentado en un tipo de investigación cualitativa. Se concluyó que La mediación tecnológica en la educación ambiental posibilita complementar elementos teóricos y prácticos, así como el desarrollo y optimización de competencias, habilidades y comportamientos de los educandos, brindándoles conocimientos que los acompañan a lo largo de los años en lugar de conocimientos abstractos y aislados, por lo que se logran convertir en un hábito, en una forma de vida, lo cual conlleva a impactar positivamente al medio ambiente. A su vez, los alumnos aumentan sus conocimientos sobre el medio ambiente, la sostenibilidad y el uso de las TIC para el beneficio de la naturaleza, lo cual contribuye a que descubran nuevas herramientas que pueden mejorar la relación entre los seres humanos y la naturaleza.
الإطار المرجعي للجودة في منظومة التربية والتكوين: المبادئ الكبرى والمعايير الرئيسية العامة
Authors:   AMAQUEN, Naji Abdennasser
Published: February 2023

يمكن اعتبار هذا الكتاب مرجعا لإعداد المعايير الرئيسية العامة لجودة منظومة التربية والتكوين. تمت صياغته انطلاقا من توجهات الرؤية الاستراتيجية 2015-2030 ومن استقراء أهم التجارب الدولية في الاشتغال بالمعايير في مجال التعليم. وعمل المؤلفان على الإحاطة بمفهوم المعايير والمقاربة المتمحورة حول النتائج ووضعها ضمن سياق العمل على إرساء نظام وطني للجودة يمكن من تحقيق وظائف المدرسة في علاقة بالارتقاء بجميع الأفراد وتنمية المجتمع في شموليته. كما أجريا قراءة مقارنة لتطبيق معايير التعليم في بعض الدول مع استخلاص الدروس الممكنة من أجل تطبيق نموذج للمعايير يكون في خدمة جودة التعلمات لجميع المتعلمين والمتعلمات. هذا العمل مكمل للكتاب الذي صدر للمؤلفين بعنوان "الإطار المرجعي للجودة في منظومة التربية والتكوين: الدلائل المرجعية لمعايير الجودة" الذي يمكن اعتباره مرجعا عمليا للفاعلين التربويين والإداريين من أجل قيادة وتدبير شؤون المؤسسات التعليمية والتكوينية ومعرفة تنظيم طرق اشتغالها. وهكذا يساهم في توحيد معايير الجودة في جميع المؤسسات الذي يعتبر عاملا أساسيا لضمان الحد الأدنى من جودة الخدمات التعليمية، وبالتالي تأمين تكافؤ الفرص لمختلف الفئات الاجتماعية من التلاميذ. ويمكن الاستئناس بالمنهجية المفصلة فيه من أجل وضع دليل مرجعي لمعايير الجودة خاص بكل سلك تعليمي أو تكويني ابتداء من التعليم الأولي، وانتهاء بالتعليم العالي، ومرورا بالتكوين المهني
Optimized transfer learning for polyp detection
Authors: Boonsim Noppakun , Kanjaruek Saranya
Published: February 2023

Early diagnosis of colorectal cancer focuses on detecting polyps in the colon as early as possible so that patients can have the best chances for success- ful treatment. This research presents the optimized parameters for polyp detection using a deep learning technique. Polyp and non-polyp images are trained on the InceptionResnetV2 model by the Faster Region Con- volutional Neural Networks (Faster R-CNN) framework to identify polyps within the colon images. The proposed method revealed more remarkable results than previous works, precision: 92.9 %, recall: 82.3%, F1-Measure: 87.3%, and F2-Measure: 54.6% on public ETIS-LARIB data set. This detection technique can reduce the chances of missing polyps during a pro- longed clinical inspection and can improve the chances of detecting multiple polyps in colon images.
Spatial Heterogeneity of Food Webs in A River-Lake Ecotone under Flow Regulation – A Case Study in Northern China
Authors:   State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China, Yang W. , Fu X. T. ,   State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China, Li X. X. ,   State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China, Cui B. S. ,   State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China, Yin X. A. ,   State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
Published: February 2023

The river–lake ecotone supports diverse aquatic life, but its food web structure and topology are poorly understood. Baiyangdian Lake, northern China’s largest shallow lake, depends on external environmental flows, of which the Fu River provides the most stable water supply. Here, we used stable isotopes and topological analysis to explore the food web structure along a spatial gradient using data from field surveys from 2018 to 2019. Carbon and nitrogen stable isotopes and the food web structure were associated with environmental factors for four ecosystem types (river, river mouth, lake mouth, lake). Detritus, phytoplankton, and zooplankton δ13C values became more depleted along the gradient from the river to the lake, whereas δ13C of submerged macrophytes was enriched in the ecotones compared to the river and lake. Higher δ15N values for basal resources and zooplankton occurred at the lake mouth and river mouth. The top consumers were omnivorous fish: Hemiculter leucisculus (trophic level [TL] = 3.85 ± 0.89) in the river and Pseudorasbora parva (TL = 4.54 ± 0.58) in the river mouth. Carnivorous Erythroculter dabryi occupied the highest TL (3.61 ± 0.36 and 4.46 ± 0.36, respectively) in the lake mouth and lake. These results together led to a change from a detritus-based to phytoplankton-based food web along the gradient from the river to the lake. The species richness, number of trophic links, link density, and mean food chain length all are greatest in the lake, followed by the lake mouth, and the lowest were in the river. Our results provide a holistic view of the ecotone ecosystem and its food web, suggesting that it supports a more diverse species assemblage and more complex food web structure than the adjacent river ecosystem, rather than the adjacent lake ecosystem. Therefore, management should emphasize the combined effects of altered hydrological regimes and poor water quality on the ecotone food webs to manage the river and lake more sustainably.
Rice Plant Leaf Disease Detection and Classification Using Optimization Enabled Deep Learning
Authors:   Department of Computer Science and Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamilnadu, India, Daniya T. ,   Department of Information Technology, GMR Institute of Technology, Rajam 532127, Andhra Pradesh, India, Vigneshwari S. ,   Department of Computer Science and Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamilnadu, India
Published: February 2023

An automatic identification and classification of rice diseases are very important in the domain of agriculture. Deep learning (DL) is an effective research area in the identification of agriculture pattern identification where it can effectively resolve the issues of diseases identification. In this paper, a hybrid optimization algorithm is developed to categorize the plant diseases. The pre-processing is made using Region of Interest (ROI) extraction and the input image is created by combining the Rice plant dataset, and Rice disease dataset. The segmentation is accomplished using Deep fuzzy clustering. The features, like statistical features, entropy, Convolutional Neural Network (CNN) features, Local Optimal-Oriented Pattern (LOOP), and Local Gabor XOR Pattern (LGXP) is considered for extracting the appropriate features for further processing. The data augmentation is employed to enlarge the volume of extracted features. Then, the first level classification is made by deep neuro-fuzzy network (DNFN), which is trained using Rider Henry Gas Solubility Optimization (RHGSO) that categories into healthy and unhealthy plants. The RHGSO is the integration of Rider Optimization Algorithm (ROA) and Henry gas solubility optimization (HGSO). After that, second-level classification is made by a Deep residual network (DRN) that is tuned by RHGSO. Thus, the RHGSO-based DRN categorizes the unhealthy plants into Bacterial Leaf Blight (BLB), Blast, and Brown spot. Thus, the implementation of the proposed RHGSO-based deep learning approach offered better accuracy, sensitivity, specificity, and F1-score of 0.9304, 0.9459, 0.8383, and 0.9142.
Investigation of fluid flow and heat transfer for an optimized lid driven cavity shape under the condition of inclined magnetic field
Authors: Wasif Mostafa , Mishal Kawsar Ahmed , Haque Mohammad Rejaul , Haque M Merajul , Rahman Fazlar
Published: February 2023

Fluid flow in the lid driven cavity is a well-known phenomenon in the realm of fluid flow and heat transfer. Different cavity shapes such as square, circular, trapezoidal, and hexagonal have already been studied. However, most of the parametric analyses have previously been done using one specific cavity shape design. The present study intends to generalize the cavity design for a larger range of applications starting from the selection of cavity form due to the enhancement of heat transfer inside that selected cavity for different boundary conditions. Numerical studies using a finite element solver have been carried out to investigate the physics of fluid flow and heat transmission in a cavity where a wall of the enclosure is moving. In this research, the average Nusselt number for six distinct shaped lid-driven cavities is studied (e.g., square, rhombus, circular, rounded rectangular, trapezoidal and hexagonal). The hexagonal-shaped cavity has the largest Nusselt number of all of them. The heat transfer increases by about 90% when the cavity shape changes from square to hexagonal at Ri = 0.1, Pr = 7, Re = 100, Ha = 30, and ? = 60°. To boost the heat transfer rate, magnetohydrodynamics (MHD) mixed convection in a lid-driven cavity with an imposed angled magnetic field was investigated. Richardson number, Reynolds number, Prandtl number, Hartmann number, and magnetic inclination angle within the enclosure are shown in terms of streamline plots, isothermal contour profiles, and Nusselt number. Through parametric investigations of cavity shapes, inclined magnetic fields, and other boundary conditions, the current research intends to improve the Nusselt number within the cavities.
Rotating convective MHD flow over a vertical moving plate in the presence of heat source, radiation, chemical reaction and Hall effects
Authors: Benharkat Zohra
Published: February 2023

The steady MHD rotating flow and heat mass transfer over a semi-infinite vertical plate moving with a constant velocity in the presence of a heat source, thermal radiation, first-order chemical reaction and Hall effect are studied. The methodology proposed to predict the velocity, temperature and concentration evolutions is based on similarity transformation and finite difference method. The simulation has been carried out for different pertinent parameters of problem. The main results are that the velocity fields are considerably affected by the velocity ratio and coriolis parameters. Except the axial w-velocity that increases only near the plate with the velocity ratio parameter, all the velocities decrease as the velocity ratio and Coriolis parameters increase, whereas the temperature and the concentration profiles increase. Also, the fluid velocity and temperature increase when the heat source and radiation parameters increase but the concentration decreases.
Numerical and experimental investigations of heat transfer inside a rectangular channel with a new tilt angle of baffles for solar air heater
Authors: Aouissi Zouhair , Chabane Foued , Teguia Mohamed-Saleh , Bensahal Djamel , Moummi Noureddine , Brima Abdelhafid
Published: February 2023

This work represents an experimental and numerical study of heat transfer by forced convection inside a channel containing the baffles of a solar collector. The study chose the shape of the baffles as an important factor to improve heat exchange, which has a rectangular shape and is transversal with air flowing at an angle of inclination ? = 90 degrees. The study was conducted at different mass flow rates and different times of the day, to find out the effect of these conditions on the convective heat transfer from the absorber plate to the air through the channel of the collector. The operating conditions taken from the experiment were entered as boundary conditions in CFD, for a comparative study between the heat transfer coefficient by convection of the measurement data, and the simulation data. It was found that the results of it in the numerical and experimental methods gave a good approach, also it can be concluded that this coefficient was affected by different parameters such as the mass flow rate, absorber temperature, and shape of the baffles. Through the results, it was confirmed that when the Reynolds number increases, it means an increase in velocity, which means that the air passing through the duct becomes cooler, therefore there is a difference in temperature between the passing air and the absorber plate, and this leads to an increase in heat transfer between the air and the absorber plate.
Control strategy of a standalone variable speed wind energy conversion system based on direct drive permanent magnet synchronous generator
Authors: Mayouf Messaoud
Published: February 2023

In this paper, we propose a control strategy for a stand-alone wind energy conversion system (WECS) based on a direct drive permanent magnet synchronous generator (PMSG), loaded on a DC-type charge. In the considered wind-power generating system, the generator provides a DC voltage to the load through a three-phase rectifier, controlled by the Pulse Width Modulation (PWM) technique. The main control strategy target is to maintain the DC voltage insensitive to fast changes in wind speed and load, by offsetting the generator output current with the charge current. The approach adopted in this paper is based on the estimate of the PMSG electromagnetic torque assuming that wind velocity remains quasi-stationary in a steady state. The instant power reference is assessed by the charge controller according to the rated DC bus voltage, using actual electrical measurements as the voltage and current. To achieve adequately the power decoupling, the field-oriented control is used with conventional PI-type regulators to provide direct and quadrature control reference voltages and ensure DC bus voltage regulation. To assess the proposed control strategy efficiency, the simulation model was subjected to different load and wind speed variations. Simulation results performed using the MATLAB Simulink model show high accuracy and strength during steady-state and transient operations.
Imaging Diagnosis of Testicular Lymphoma in Young Male Patient: Incidental Finding in Ultrasonography
Authors: Sutrisno Sony
Published: February 2023

BACKGROUND: Ultrasonography is a common diagnostic procedure in patients with testicular abnormalities. Primary testicular lymphoma (PTL) is rarely discovered and is more common among elderly populations.
CASE PRESENTATION: This case describes a young male patient with a history of painless testicular enlargement. Ultrasonography reveals an incidental finding of hypoechoic echo structural mass and increased vascularity using color Doppler ultrasonography. The further pathological examination discovered the findings indicative of a non-Hodgkin, diffuse, and large B-cell lymphoma. These distinctive features should be helpful in suggesting a diagnosis of PTL on imaging.
CONCLUSION: PTL is a rare and aggressive extranodal NHL. Despite its low incidence, it is an extremely rare testicular cancer at a young age. Careful ultrasound imaging examination should be applied in patients with testicular enlargement. The presence of hypoechoic echostructural and an increase in vascularity should be considered for the possibility of a diagnosis of primary testicular tumor.
Repenser la place de l’entreprise et de l’innovation : regards croisés sur l’Anthropocène
Authors: Diné Sébastien , Catanzaro Alexis , Vernac Stéphane
Published: February 2023

Les récentes crises que nous connaissons nous donnent à voir un aperçu du monde à venir. Le constat peut être fait que la majorité des réponses apportées actuellement par les entrepreneurs et dirigeants ne prend pas la mesure de la situation. Ce « regards croisés » souligne les freins empêchant l’évolution des comportements et des représentations. À l’opposé des pratiques organisationnelles actuelles dites « écologiques », il contribue surtout à porter davantage l’attention sur les problématiques d’innovation et de gouvernance, beaucoup plus à même de fournir des réponses à la hauteur des enjeux à venir.
Quand l’innovation bouscule les équilibres institutionnels : cas des agrégateurs bancaires
Authors: Chardain Antoine , Vitari Claudio
Published: February 2023

Lorsqu’une innovation est mise en marché, elle vient bousculer plus ou moins vivement et plus ou moins fortement les institutions en place, acteurs et représentations. Dans ce contexte de changement, le régulateur est parfois amené à intervenir et à impacter la trajectoire d’une innovation. L’étude du cas des agrégateurs bancaires, lancés par des start-up, permet d’étudier le rôle du régulateur sur la dynamique d’une innovation, dans le contexte de l’Union européenne. Ce cas met en évidence que les rôles des régulateurs et des superviseurs liés à la gestion du changement institutionnel impactent fortement la dynamique. Pour un entrepreneur, cette compréhension des différents rôles et de leurs impacts potentiels est de nature à aider au pilotage de son entreprise.
Défis de la cocréation, l’exemple d’un partenariat entre un pôle de compétitivité et une équipe de recherche
Authors: Lequin Sonia , Reboud Sophie
Published: February 2023

Cet article rapporte une expérience de cocréation, entre une équipe de recherche (fournisseur) et un pôle de compétitivité (client), d’un outil d’aide à la décision stratégique pour des PME du secteur agroalimentaire. La démarche de cocréation suivie lors de cette expérience avait pour but de rassembler les utilisateurs et bénéficiaires futurs de l’outil et de s’appuyer sur des concepts réellement adaptés aux PME ordinaires. Si cet objectif a bien été atteint, l’expérience a mis en évidence l’importance des enjeux stratégiques des acteurs et de leurs évolutions au cours du processus, en particulier, la place que le projet occupe dans ces derniers.
Étudiantes entrepreneures : la perception paradoxale des chargés d’accompagnement
Authors: Eynaud Stéphanie
Published: February 2023

Malgré les dispositifs incitant les étudiant·es à entreprendre depuis une dizaine d’années, le taux de femmes créatrices d’entreprise stagne. Nous avons cherché à comprendre les perceptions des accompagnateurs sur les étudiantes entrepreneures afin d’identifier si l’accompagnement pouvait être un levier pour les encourager. Notre recherche met en évidence une perception paradoxale des chargés d’accompagnement sur les caractéristiques des étudiantes entrepreneures. Loin de ne pas avoir conscience des embûches qu’elles doivent affronter, ils ne souhaitent pas les évoquer de manière directe. Les aspects négatifs de ce qui attend ces jeunes femmes dans leur parcours entrepreneurial sont omis, par crainte de les stigmatiser davantage. Les objectifs et langages n’étant pas partagés entre les deux populations, il est important de former les chargés d’accompagnement à la prise en compte du genre et proposer aux étudiantes entrepreneures un accompagnement en fonction de leurs besoins et profils.
Multiple solutions to Kirchhoff-Schrödinger equations involving the $ p(\cdot) $-Laplace-type operator
Authors: Kim Yun-Ho
Published: February 2023

This paper is devoted to deriving several multiplicity results of nontrivial weak solutions to Kirchhoff-Schrödinger equations involving the $ p(\cdot) $-Laplace-type operator. The aims of this paper are stated as follows. First, under some conditions on a nonlinear term, we show that our problem has a sequence of infinitely many large energy solutions. Second, we obtain the existence of a sequence of infinitely many small energy solutions to the problem on a new class of nonlinear term. The primary tools to obtain such multiplicity results are the fountain theorem and the dual fountain theorem, respectively.
Fibonacci signals with timing jitter
Authors: Citrin D. S.
Published: February 2023

The power spectral density of a signal comprised of a sequence of Dirac $ \delta $-functions at successive times determined by a Fibonacci sequence is the temporal analog of the well known structure factor for a Fibonacci chain. Such a signal is quasi-periodic and, under suitable choice of parameters, is the temporal analog of a one-dimensional quasicrystal. While the effects of disorder in the spatial case of Fibonacci chains has been studied numerically, having an analytically tractable stochastic model is needed both for the spatial and temporal cases to be able to study these effects as model parameters are varied. Here, we consider the effects of errors in where the $ \delta $-functions defining the signal in the temporal case occur, i.e., timing jitter. In this work, we present an analytically tractable theory of how timing jitter affects the power spectral density of Fibonacci signals.
Origen, conformación y fin de un sistema agroecológico: los solares sustentables de la Mixteca Alta de México
Authors: Mendoza García J. Edgar
Published: February 2023

El propósito de este artículo es analizar el origen, desarrollo y ocaso del sistema agroecológico y alimentario de la Mixteca Alta desde fines del periodo prehispánico hasta la introducción del capitalismo en el contexto de la gran aceleración que se manifestó indirectamente en esta región a mediados del siglo xx, con la apertura de carreteras y emigración de la población local hacia las ciudades y los centros industriales, lo que trajo como consecuencia casi la extinción de los solares sustentables y otras formas de alimentación ajenas a las dietas locales.
Bosques de guacamole: el surgimiento de la franja aguacatera mexicana a mediados del siglo xx
Authors: Fernández Viridiana Hernández
Published: February 2023

De 1975 a 1985, los agricultores michoacanos incrementaron la producción aguacatera en un 600%. Tres factores explican el extraordinario aceleramiento en la producción: (1) cambios en el uso de suelo, (2) el desarrollo de infraestructura agrícola en la región, y (3) las cambiantes políticas de manejo forestal del Estado mexicano. Este artículo describe estos cambios y sus consecuencias en los bosques de la Meseta Purhépecha que cultiva cada año casi el 30% de la producción total global de aguacate.
Entre exploitation et protection : la question forestière au cœur d’une ambivalence historique au Brésil
Authors: Daugeard Marion , Cunha Paulo Roberto
Published: February 2023

L’étude de la trajectoire de construction et d’évolution de la législation forestière brésilienne permet de retracer la façon dont les élites et les gouvernants ont historiquement envisagé l’usage des forêts et des autres formes de végétation. Cet article met en évidence le caractère ambivalent de ce processus et propose ainsi une approche originale pour analyser les enjeux actuels que traverse le Brésil, à l’heure de l’anthropocène.
Expansion hydroélectrique et contrôle de l’eau par l’État au Brésil (1930-1990)
Authors: Capellini Nathalia
Published: February 2023

Cet article analyse le rôle croissant de l’État brésilien dans le secteur électrique entre 1930 et la fin des années 1980, et, plus particulièrement, les controverses autour de la construction des barrages hydroélectriques de Tucuruí et Sobradinho. En adoptant une approche d’histoire environnementale, il interroge la logique et les ressorts politiques de cette participation croissante de l’État, pour montrer les liens entre les projets de développement, la gestion de l’eau et la modification de la nature du pays.
Recursos genéticos e bioprospecção no Brasil: capitaloceno, protagonismo e os (des)caminhos até o Protocolo de Nagoya (2010)
Authors: Relly Eduardo
Published: February 2023

Dado o agravamento da crise ecológica e climática, a conversão da natureza em biodiversidade possibilitou o avanço das agendas político-econômicas de países portadores de alta diversidade genética, cabendo ao Brasil uma posição central na gestão da crise planetária. Sob o neoliberalismo, práticas de bioprospecção e recursos genéticos foram ressignificadas e ampliadas, alavancando os interesses brasileiros na condução dos marcos regulatórios globais. Este artigo visa compreender tal processo até o Protocolo de Nagoya em 2010.
Le guarani dans la poésie bilingue : renégocier les notions d’exception et de marginalité
Authors: Naro Manon
Published: February 2023

Cet article se propose de penser les conditions d’émergence et les
caractéristiques d’une poésie bilingue en guarani à partir d’une
réflexion autour des concepts de marginalité et d’exception. À partir
d’une étude des discours sur la littérature paraguayenne et des
recueils contemporains de poésie bilingue, nous tentons de discerner
comment se construit et se reconstruit une histoire de cette poésie,
depuis les stigmates de la marge et de l’exception jusqu’à une
renégociation de ces notions pour fonder une poésie de
la résistance.
Governança hídrica na região semiárida do Estado de Pernambuco (Brasil): análise da gestão do Comitê da Bacia Hidrográfica do São Francisco
Authors: Cordeiro Pereira Sidclay , Delanusse Theodoro Hildelano
Published: February 2023

Objetiva-se, nesse artigo, compreender a governança hídrica na região semiárida do estado de Pernambuco, Brasil, através da análise das ações dos participantes do Comitê da Bacia Hidrográfica do São Francisco no período 2016-2020. A pesquisa fez uso de dados e informações publicadas e de entrevistas com os membros da Câmara Consultiva Regional Submédio São Francisco. Conclui-se que é fundamental incentivar a participação dos sujeitos na mudança institucional para a uma boa governança.
The Hidden Obstacles to Intranasal Insulin Delivery
Authors: Rawat Ujjawal , Choudhary Ambika , Mittal Piyush , Verma Anurag
Published: February 2023

A large number of people are suffering with one or the other type of diabetes around the globe. Insulin has proven to be beneficial for the treatment of both types of diabetes. Due to the drawbacks (injection pain, needle phobia, lipodystrophy, noncompliance peripheral hyperinsulinemia, failure to deliver physiological pattern of insulin, and daily metabolic variability in glycemic control) associated with a conventional delivery system that is, the subcutaneous injection, a need to develop new insulin delivery system was felt strongly. A few noninvasive methods which are under process to deliver insulin include per-oral (enteric gastrointestinal route), intrapulmonary, buccal, intranasal, oropharyngeal, rectal, intrauterine, ocular, transdermal, oral, and vaginal. Intranasal insulin is fetching tons of importance as it provides multiple reasons to choose this method of delivery over other delivery systems. Certain factors are responsible for limiting the use of intranasal insulin for which various methods have been studied to overcome it. Many clinical trials are going on for launching intranasal insulin into the market.
Facial-acquired Partial Lipo Dystrophy Associated with Diabetes
Authors: Agrawal Prabhat , Pursnani Nikhil , Gautam Ashish , Gupta Prashant
Published: February 2023

A 49-year-old woman with type 2 diabetes and hypertension presented to our outpatient department with complaint of wasting of facial muscles on both sides of face for the last 8–10 months. On further workup, she also had other signs and symptoms of metabolic syndrome. We ruled out other causes of lipodystrophy. Therefore, probably, this is the first case of acquired partial lipodystrophy of face associated with resistant diabetes.
Glycolyzed Hemoglobin as a Poor Prognostic Factor in Diabetic COVID-19 Patients
Authors: Torun Parmaksız Elif , Parmaksız Ergün
Published: February 2023

Background:

Diabetes mellitus (DM) seems to be conveying increased risk in Coronavirus disease-2019 (COVID-19). We aimed to evaluate the effect of glycemic control on the risk of prevalence and mortality in diabetic COVID-19 patients.

Materials and Methods:

In this retrospective observational study, the data from diabetic patients admitted to our hospital with the diagnosis of COVID-19 between March 2020 and March 2021 were reviewed. The demographic, clinical, laboratory, and radiological data, and the course and outcomes were recorded.

Results:

The records of 352 diabetic patients were compared to 333 non-diabetic controls. The mean age of 184 male and 168 female patients was 63.7±13.0 (30–91). The length of hospital stay, rate of Intensive care unit (ICU) admission, and mortality were higher in the diabetic population compared to the non-diabetic counterparts. ICU admission and mortality rates were significantly higher in the group with HbA1c higher than 7%. The rate of ICU admission and mortality was significantly higher in participants with elevated HbA1c

Conclusions:

Uncontrolled DM is among detrimental comorbidities contributing to the severity of SARS-CoV-2 infection and good control of serum glucose levels will improve prognosis in COVID-19. The diabetic population with poor glycemic control succumbed more to COVID-19.
Prevalence of and Risk Factors for Diabesity in Urban Chennai
Authors: Raveendiran Aarthi Garudam , Pradeepa Rajendra , Ulagamathesan Venkatesan , Chambers John Campbell , Mohan Viswanathan , Venkatasubramanian Padma , Mohan Anjana Ranjit
Published: February 2023

Background:

A large number of epidemiologic studies across the world indicate a growing link between obesity and diabetes. The metropolitan city of Chennai in South India is experiencing an alarming increase in diabetes and obesity.

Aim:

The aim of this study was to determine the prevalence of and risk factors for diabetes and obesity together termed as “diabesity” among adults in urban Chennai.

Materials and Methods:

This was a community-based cross-sectional door-to-door study done as part of a large National Institute of Health and Care Research (NIHR)––a funded project aimed to understand patterns and determinants of health in South Asia. Of the 200 wards in Chennai, 34 wards were surveyed in the main project and two wards were selected randomly for this substudy. Five community enumeration blocks were selected using a systematic sampling technique. Participants aged ≥18 years were selected using a consecutive sampling method.

Results:

Of the 1138 participants studied, the prevalence of diabesity was found to be 34.3%(n = 390). Of the study participants, 74.8% had obesity (61.9%––generalized obesity; 68.5%––abdominal obesity) and 43.0% had diabetes. As age increased, the diabesity risk also increased gradually from 30 to 39 years (odds ratio [OR]: 3.6[95%, confidence interval [CI]: 1.4–8.9]) to 50–59 years (OR: 5.4[95%, CI: 2.2–13.2]), whereas there was a slight decrease in risk after 60 years (OR: 5.1[95%, CI: 2.1–12.3]). Females had nearly twice the risk of diabesity compared to men (OR: 1.8, P < 0.001), and physically inactive individuals had 1.7 times increased risk (P < 0.001).

Conclusion:

We report in this study that the prevalence of the dual metabolic defect (diabesity) is alarmingly high in urban Chennai. This study was an attempt to understand the epidemiology of diabesity.
The Efficacy of Tadalafil and Tadalafil + Dapoxetine in Managing Sexual Dysfunction in Individuals with Type-2 Diabetes Mellitus
Authors: Chavda Vipul , Jha Santosh , Gandhi Tejal R. , Patel Anjali B. , Raninga Hiren , Chaudhari Amol , Hasnani Dhruvi
Published: February 2023

Objective:

The present study was aimed to evaluate effect of metabolic parameters on erectile dysfunction (ED) in individuals with type-2 diabetes mellitus (T2DM) and to assess the efficacy of Tadalafil and Tadalafil + Dapoxetine combination.

Materials and Methods:

A prospective, observational, cross-sectional, bicentric study included 216 males with T2DM who are not treated with phosphodiesterase 5 inhibitors and without chronic kidney disease. The data were obtained from demographic questionnaire, clinical laboratory reports of glycometabolic parameters namely body mass index (BMI), hemoglobin A1c (HbA1c), testosterone, vitamin B12 (VitB12), and lipid profile and analyses of the International Index of Erectile Function (IIEF) questionnaire. The effect of physical and metabolic parameters on IIEF sub-domains namely erectile function; orgasmic function; sexual desire (SD); intercourse satisfaction; and overall satisfaction was evaluated. A statistical significance was evaluated using χ
2 test or t-test.

Result:

SD is most significantly lower in subjects with imbalanced physiological and metabolic characteristics including BMI, HbA1c, testosterone, VitB12, triglyceride, high-density lipoprotein, and low-density lipoprotein. Both Tadalafil and Tadalafil + Dapoxetine significantly improved almost all IIEF parameters without any pronounced effect of either. Similarly, both the treatments improved all the IIEF parameters for subjects with high BMI except for SD. In subjects with cardiac comorbidities, the use of either treatment significantly enhanced all the IIEF scores.

Conclusion:

The findings of this study outline the need of careful examination of sexual dysfunction in healthcare clinics for diabetic individuals. An imbalanced physiological and metabolic profile leads to ED in individuals with T2DM. Additionally, the presence of co-morbidities further elevates the odds of ED prevalence. The treatment with Tadalafil and Tadalafil + Dapoxetine drug combination shows promising results in improving the ED but a study with larger pool of subjects is needed to determine the additional benefits of Dapoxetine.
Development and Validation of a Situational Anxiety Scale Screening Assessment among Adults with Type 2 Diabetes During COVID-19 at a Tertiary Centre in Chennai, India
Authors: Poongothai Subramani , Latha Satish , Lalasa Mokkapati , Swetha Karthikeyan , Mohan Viswanathan
Published: February 2023

Aim:

The aim of this study was to develop and validate the situational anxiety scale (SAS) during COVID-19 among adults with type 2 diabetes attending a tertiary diabetes center in Southern India.

Materials and Methods:

A total of 100 individuals aged from 18 to 65 years with type 2 diabetes attending a tertiary care diabetes center completed a structured SAS at two visits. The first visit (visit 1) survey was conducted in April 2021 and the second visit (visit 2) survey was conducted in March 2022. The SAS was administered to all 100 individuals. The State Trait Anxiety Inventory Scale (STAI-S) consisting of 20 questions was administered to the same 100 individuals in addition to the SAS during Visit 2.

Results:

The SAS showed good internal consistency for visit 1 (α = 0.855) and visit 2 (α = 0.795). Exploratory factor analysis showed four factors and explained 69% of variance. The four factors identified were as follows: (1) fear, (2) desire for COVID-free state, (3) lack of interest and energy, and (4) financial worries. A weak positive correlation was observed between SAS visit 2 and STAI-S, and it was statistically significant (r = 0.223; P = 0.026).

Conclusion:

The SAS is a valid and reliable tool for measuring situational anxiety during pandemics and post-COVID anxiety levels, which can help in the development of a holistic approach.
Effect of Gamma Irradiation on the 24-h Glycemic Responses of Parboiled Brown Rice Diets in Asian Indian Adults
Authors: Shobana Shanmugam , Gayathri Rajagopal , Jayanthan Mathiyazhagan , Sudha Vasudevan , Jamdar Sahayog N. , Malleshi Nagappa G. , Krishnaswamy Kamala , Mohan Anjana Ranjit , Unnikrishnan Ranjit , Mohan Viswanathan
Published: February 2023

Background:

The nutritional importance of brown rice (BR) is well established. Despite several nutritional benefits of BR, its consumption remains limited due to long cooking time and limited shelf-life. BR can be subjected to processing to improve shelf-life. Gamma irradiation is one such strategy, but it could induce changes in the grain and thus affect its glycemic properties.

Aims and objectives:

The aim of this study was to look at the 24-h glycemic response of irradiated and non-irradiated BR-based iso-caloric diets in Asian Indians.

Methods:

Fifteen (mean body mass index: 24 ± 2.6 kg/m2) Asian Indian adults without diabetes, aged 25–39 years, participated in this randomized cross-over study. Iso-caloric diets were prepared with two varieties (ADT 43 and Swarna) of parboiled gamma-irradiated brown rice with 750–820 Gy dosage (IBR) and non-irradiated brown rice (NIBR). After the participants consumed these diets, 24-h glycemic responses were recorded using a continuous glucose monitoring system. The mean positive change from baseline glucose concentration was calculated as the incremental area under the curve (IAUC) for both the diets.

Results:

The percentage difference in 24-h average IAUC was 10% lower in the IBR diets when compared with NIBR diets, irrespective of the variety of BR (P = 0.56). In the case of ADT 43 rice variety, both IBR and NIBR diets showed similar IAUC (P = 0.68). However, the IBR of Swarna rice variety showed 21% lower IAUC when compared with the NIBR diet (P = 0.21). Comparing the IBR varieties, Swarna showed 21% lower IAUC than ADT 43 (P = 0.21), whereas between NIBR varieties, only 0.79% difference was observed between ADT 43 and Swarna (P = 0.93).

Conclusions:

Gamma irradiation of parboiled BR did not produce significant differences in the 24-h glycemic responses for BR-based diets. Swarna variety was better than ADT 43 with regard to glycemic response. Judicious application of radiation technology to BR varieties may help in shelf-life extension without affecting the glycemic properties.
Assessment of Serum Galectin-3 Levels in Patients with Gestational Diabetes Mellitus
Authors: Baldane Suleyman , Celik Murat , Korez Muslu K. , Gul Baldane Emine , Abusoglu Sedat , Ali Unlu , Ipekci Suleyman , Kebapcilar Levent
Published: February 2023

Objective:

This study was aimed to compare serum galectin-3 (Gal-3) levels in gestational diabetes mellitus (GDM) and healthy pregnant women and to evaluate the relationship between insulin resistance parameters and serum Gal-3 levels.

Materials and Methods:

Fifty-nine pregnant women who were screened for GDM with oral glucose tolerance tests (OGTT) at the 24th–28th gestational weeks were included in the study. According to the results of OGTT, 34 pregnant women were included in the GDM group and 25 pregnant women were included in the control group.

Results:

Serum Gal-3 value was found to be similar in the GDM and control group (P < 0.471). However, there was a significant positive association between Gal-3 and fasting insulin (r = 0.509, P < 0.001) and homeostasis model assessment of insulin resistance (HOMA-IR) (r = 0.479, P < 0.001) in the whole pregnancies, and between Gal-3 levels and fasting insulin (r = 0.608, P < 0.001), HOMA-IR (r = 0.609, P < 0.001), and OGTT 60 min glucose (r = 0.444, P = 0.016) in the GDM patients.

Conclusions:

There was no difference in the last trimester serum Gal-3 levels between GDM and healthy pregnant women. However, a significant positive correlation was determined between Gal-3 and fasting insulin, HOMA-IR, and OGTT 60 min glucose values in the GDM group, and fasting insulin and HOMA-IR values in whole pregnancies. The results of our study support previous data reporting the relationship between Gal-3 and GDM through insulin resistance.
Direct tracking of noncircular sources for multiple arrays via improved unscented particle filter method
Authors: Qian Yang , Shi Xinlei , Zeng Haowei , Ahmad Mushtaq
Published: February 2023

Direct tracking problem of moving noncircular sources for multiple arrays is investigated in this study. Here, we propose an improved unscented particle filter (I‐UPF) direct tracking method, which combines system proportional symmetry unscented particle filter and Markov Chain Monte Carlo (MCMC) algorithm. Noncircular sources can extend the dimension of sources matrix, and the direct tracking accuracy is improved. This method uses multiple arrays to receive sources. Firstly, set up a direct tracking model through consecutive time and Doppler information. Subsequently, based on the improved unscented particle filter algorithm, the proposed tracking model is to improve the direct tracking accuracy and reduce computational complexity. Simulation results show that the proposed improved unscented particle filter algorithm for noncircular sources has enhanced tracking accuracy than Markov Chain Monte Carlo unscented particle filter algorithm, Markov Chain Monte Carlo extended Kalman particle filter, and two‐step tracking method.