bluuebunny/crossref_metadata_2025 huggingface dataset:
Evolution des coefficients globaux d’échange Thermique des matériaux kapok-plâtre et filasse-plâtre en régime dynamique fréquentiel
Authors: Ould Brahim Mohamed Sidya , Tamba Seni , Sarr Mhedhbi , Diène Alassane , Diagne Issa , Niang Fadel , Sissoko Grégoire
Published: December 2023

Les isolants thermiques filasse-plâtre (la filasse est constituée de fibres végétales) et kapok-plâtre (le kapok est le fruit d’un arbre) sont caractérisés en régime dynamique fréquentiel à partir du coefficient global d’échange thermique. Les valeurs limites du coefficient global d’échange thermique sont obtenues à partir des diagrammes Bode. Les représentations de Nyquist ont permis de déterminer les résistances série et shunt du système matériau soumis aux sollicitations climatiques extérieures. Le modèle électrique équivalent proposé traduit le comportement du système thermique d’un point de vue électrique.
Matériaux de construction et confort thermique en zone chaude Application au cas des régions climatiques camerounaises
Authors: Kemajou Alexis , Mba Léopold
Published: December 2023

La présente étude est consacrée à l’obtention du confort thermique dans l’habitat par une utilisation judicieuse des matériaux de construction. La particularité de cette étude est qu’elle intègre un volet socioculturel par la prise en compte des matériaux entrant dans les habitudes architecturales de la population en comparaison aux habitats ‘modernes’ en parpaing aggloméré creux en zone chaude. Les simulations des habitats sont effectuées avec le logiciel Pléiades+Comfie et les réponses thermiques de leurs enveloppes sont analysées. Au cours de cette simulation thermique, des comparaisons sont effectuées entre les matériaux traditionnels disponibles dans chaque zone climatique comme le bois, la brique de terre, la terre battue et les matériaux modernes, tels que le parpaing de ciment. Les résultats de ces simulations ont montré qu’en fonction des climats, le bois et la brique de terre sont meilleurs par rapport au parpaing de ciment, car l’habitat traditionnel représente parfois une réponse directe aux contraintes climatiques et est spécifique à chaque région. L’analyse des résultats montre aussi que l’on peut obtenir un bon niveau de confort thermique, avec les matériaux locaux en améliorant un choix de la forme de l’habitat, son orientation et les dimensions des ouvertures.
Effet de la géométrie sur la performance thermique d’une serre agricole
Authors: Berroug Fatiha , Lakhal El Khadir , El Omari Mohamed , El Qarnia Hamid , Faraji Mustapha
Published: December 2023

Dans ce travail, on se propose de déterminer numériquement l’effet de la géométrie des serres agricoles sur leurs performances thermiques. L’étude consiste à introduire la géométrie dans un modèle de bilan énergétique et de quantifier par la suite son effet sur la température à l’intérieur de la serre. Pour les conditions climatiques typiques de la ville de Marrakech, Maroc (latitude 31,62°), les résultats indiquent que la serre mono chapelle asymétrique procure la température minimale à l’intérieur de la serre. Quant à la serre du type tunnel modifié, elle génère une température relativement élevée à l’intérieur de la serre. Globalement, pour les trois formes de serre étudiées, il a été trouvé que la différence moyenne de température est de l’ordre de 3 °C.
Modélisation des échanges convectifs dans le conduit utile d’un capteur solaire plan à air muni de rugosités artificielles de formes rectangulaires
Authors: Menasria Fouad , Moummi Abdelhafid , Moummi Noureddine , Zedayria Merouane , Guestal Mabrouk
Published: December 2023

Ce travail consiste à établir des modèles empiriques de calcul du coefficient d’échange thermique par convection, lors de l’écoulement de l’air dans un conduit utile rectangulaire d’un capteur solaire plan à air, dont le plan inférieur est muni de rugosités artificielles dites chicanes de formes rectangulaires disposées en quinconce. Par la méthode de l’analyse dimensionnelle, on a pu mettre en relation tous les paramètres physiques, thermophysiques et les caractéristiques géométriques des chicanes, en fonction du régime d’écoulement on estime un coefficient d’échange global par convection dans l’espace d’écoulement du fluide.
Réduction des pertes de puissance dans un réseau de distribution alimenté par un générateur d’énergie nouvelle et renouvelable
Authors: Tchuidjan Roger , Hamandjoda Oumarou , Tabe Moses
Published: December 2023

Ce papier montre qu’une des difficultés à laquelle le distributeur d’énergie électrique nouvelle et renouvelable se heurte est le problème des pertes d’énergies en ligne, dues principalement aux résistances actives et réactives. Une approche de résolution du problème présentée ici, consiste à déterminer le point où il faudra placer le générateur d’énergie nouvelle et renouvelable, de telle sorte que les pertes de puissance dans le réseau électrique de distribution soient considérablement réduites. Cette position est appelée Centre de Répartition des Charges, ‘CRC’. La méthode utilisée est en fait une sorte de centre de gravité d’un système constitué de points pondérés par les puissances des différents consommateurs. Il est démontré ici que le centre de répartition des charges électriques obéit à une loi normale de distribution. La technique du centre de répartition des charges permet d’obtenir des longueurs optimales de câbles électriques pour la distribution de l’énergie produite par un générateur solaire ou éolien. Moins les câbles électriques sont longs, les pertes en lignes sont réduites, le coût de l’installation est également réduit. Les résultats obtenus montrent que si le centre de répartition des charges électriques se trouve dans l’ellipse, alors les pertes de puissance électriques sont minimales. Force est de constater la réduction du nombre de panneaux photovoltaïques à employer, si la position géographique du générateur d’énergie nouvelle et renouvelable a été choisie selon la technique du CRC.
Indoor and outdoor photovoltaic modules Performances based on thin films solar cells
Authors: Agroui Kamel , Hadj Arab Amar , Pellegrino Michelle , Giovanni Flaminio , Hadj Mahammad Idriss
Published: December 2023

This paper summarizes the electrical and thermal characterizations of thin film PV modules based on amorphous triple junctions (3J: a-Si) and Copper Indium Selenide (CIS) thin film solar cells. Tests are operated in outdoor exposure and under natural sunlight of URAER located in Saharan region of Ghardaïa (Algeria) as specific desert climate environment, characterized by high irradiation and temperature levels as well as ENEA-Portici located in Naples (Italy) as Mediterranean site. PV modules performance evaluation was performed according to international standard as diagnostic test of data manufacturer. We used the thermal infrared analysis to detect the homogeneity mapping temperature of solar cells in the PV module. Data acquired from Environmental Operating Conditions (EOC) was converted into solar module output characteristics at Standard Test Conditions (STC) by using three method suggested by A.J. Anderson and G. Blaesser as well as the equations already standardized as IEC 60891. Then, based on the investigation results of the conversion equations, these methods of translation are distinguished by the type of solar cell technology and the application range. A difference between the tests in situ and in natural environment exists, attributed to various factors but mainly to the mismatch between the spectral responses of PV module and the reference solar cell.
Influence d’une onde électromagnétique sur une photopile au silicium sous éclairement multi spectral en régime statique
Authors: Zerbo Issa , Zoungrana Martial , Seré Ahmed Douani , Ouedraogo Francois , Sam Raguilignaba , Zouma Bernard , Zougmoré François
Published: December 2023

Dans ce travail, nous étudions l’influence d’une onde électromagnétique produite par une source de télécommunication (antenne émettrice) de puissance donnée sur le comportement d’une photopile en régime statique, éclairée par une lumière blanche et placée à une certaine distance de l’antenne. Après la résolution de l’équation de continuité des porteurs minoritaires de charge en présence du champ électromagnétique, nous établissons de nouvelles expressions de la densité des porteurs minoritaires de charge, de la densité de photo courant, de la vitesse de recombinaison à la face arrière de la base et de la photo tension, toutes dépendantes du champ électromagnétique. La densité des porteurs minoritaires de charge, la densité de photo courant, la vitesse de recombinaison à la face arrière de la base et la photo tension sont étudiées en fonction de l’intensité du champ électromagnétique elle-même fonction de la distance séparant la photopile de la source de production des ondes électromagnétiques. Afin de mieux caractériser la photopile, nous étudions la puissance électrique délivrée par la base de la photopile au circuit de charge extérieur en fonction de l’intensité du champ électromagnétique et nous déduisons le rendement de conversion de la photopile.
Diagnostic de pannes d’un système de pompage photovoltaïque
Authors: Bandou Farida , Hadj Arab Amar , Bouchouicha Kada , Zerhouni Noureddine
Published: December 2023

L’utilisation des énergies renouvelables connaît une croissance significative dans le monde. Devant la demande croissante d’énergie électrique essentiellement pour les besoins des régions éloignées, désertes, les systèmes photovoltaïques, en particulier les systèmes de pompage d’eau, commencent à trouver de grandes applications. Malheureusement, ces systèmes se sont heurtés à un certain nombre de problèmes dont plusieurs persistent de nos jours: problème d’entretien et de maintenance. Dans ce sens, l’étude proposée est de concevoir un outil d’aide au diagnostic et à la réparation qui emploie la méthodologie de raisonnement à partir de cas. Ceci dans le but est d’assurer un bon fonctionnement et de facilité les stratégies de la maintenance.
Dimensionnement optimal d’un système photovoltaïque pour la production d’hydrogène pour usage en mélange avec le gaz naturel comprimé dans les véhicules
Authors: Tebibel Hammou , Mahmah Bouziane , Bendaïkha Wahiba
Published: December 2023

A moyen terme, le mélange gaz naturel comprimé et hydrogène ‘HCNG’ peut être utilisé en Algérie pour surpasser la forte consommation en carburant ces dernières années. La production du mélange ‘HCNG’ nécessite des systèmes de production d’hydrogène. L’actuel article présente la méthodologie pour un dimensionnement optimal d’un système photovoltaïque pour la production d’hydrogène ‘PV-H2’ qui sera utilisé en mélange avec le gaz naturel comprimé pour les véhicules. Une étude de cas appliquée sur le parc d’automobile type GNC de Sonelgaz est présentée. Le dimensionnement effectué, lors de cette étude, est réalisé sur deux systèmes ‘PV-H2’ correspondants à l’enrichissement du GNC par l’hydrogène à 8 % et 20 % par volume. La capacité du générateur photovoltaïque et de l’électrolyseur constituants le système à 8 %: 152 kWc et 148 kW et le système à 20 %: 480 kWc et 470 kW respectivement. Le premier système (PV-H2-8%) génère entre 0.31 et 1.07 MWh d’électricité PV utilisé pour produire entre 5.2 et 17.7 kg d’hydrogène. La capacité du second système (PV-H2-20%) lui permet de générer entre 0.78 et 2.68 MWh d’électricité pour produire entre 13.02 et 44.3 kg d’hydrogène.
L’effet de la géométrie urbaine sur l’écoulement du vent et la ventilation naturelle extérieure
Authors: Bouketta Samira , Bouchahm Yasmina
Published: December 2023

Le vent est l’un des facteurs qui déterminent le succès ou l’échec d’un espace public. Comme il représente un élément assez perceptible du microclimat urbain, il exerce une grande influence sur le confort thermique. Il peut être une source de ventilation en été, ou une source de nuisances en hiver. L’intérêt de cette étude est de mettre en évidence l’effet de la géométrie urbaine sur l’écoulement du vent et la ventilation naturelle extérieure dans la ville de Jijel. Une campagne de mesures in situ a été menée, pendant laquelle la température de l’air, l’humidité relative et la vitesse du vent ont été enregistrées simultanément pour deux cas d’étude différemment situés, à géométries distinctes, durant les périodes hivernale et estivale. Les résultats montrent que la géométrie du plan de masse et la disposition des formes bâties sur celui-ci détermine et modélise l’écoulement du vent. Pour le climat humide de Jijel et son régime des vents, une géométrie éclatée du plan de masse est à déconseiller pour un site en altitude. En revanche, elle sera de mise pour les zones situées à basse altitude. Le logiciel ‘envi-met 3.1 beta 4’ nous a permis d’effectuer une simulation numérique et de vérifier les résultats obtenus par la campagne de mesures. Grâce à l’élaboration de divers scénarii et à l’interprétation des résultats, nous sommes à même d’affirmer que l’arrangement des constructions sur le plan de masse a une influence directe sur l’écoulement du vent.
Optimization of osmotic dehydration of orange pieces (valencia late) in sugar solution using response surface methodology
Authors: Khatir Amel , Acheheb Hakima , Malek Ali , Ferradji Ali
Published: December 2023

Response surface methodology was used to determine the optimum processing conditions that yield maximum water loss and weight reduction and minimum solid gain during osmotic dehydration orange pieces (valencia late) in sugar solution using response surface. The experiments were conducted according to a Central Composite Design ‘CCD’. The independent process variables for osmotic dehydration process were temperature (40, 50, 60 °C), processing time (60, 120 et 240 min) and sugar concentrations (45, 55, 65 % w/w). The optimal conditions for maximum water loss, weight reduction and solid gain (candying) correspond to temperature of 50 °C, processing time of 240 min, sugar concentration of 65 % in order to obtain water loss 60.83 % (g/100 g fresh sample), solid gain of 46,48 % (g/100 g fresh sample) and weight reduction of 57.42 (g/100 g fresh sample). However the optimal conditions for maximum water loss and weight reduction and minimum solid gain (respectively 53.28 %, 57.88 % and 27.18 %) correspond to temperature of 40 oC, processing time of 240 min, sugar concentration of 65 %.
Evaluation de l’irradiation solaire globale sur une surface inclinée selon différents modèles pour le site de Bouzaréah
Authors: Kerkouche Karim , Cherfa Farida , Hadj Arab Amar , Bouchakour Salim , Abdeladim Kamel , Bergheul Karima
Published: December 2023

Un des facteurs majeurs dans l’évaluation du gisement solaire, pour le dimensionnement des systèmes photovoltaïques, est la disponibilité des données d’irradiation globale, horizontale et inclinée qui soient cohérentes et de haute qualité. Dans ce travail, nous analysons les résultats fournis par neuf modèles isotopiques et anisotropiques pour l’estimation des valeurs horaires de l’irradiation solaire diffuse qui seront par la suite utilisées pour l’évaluation des irradiations solaires globales inclinées horaires. La validation des modèles est effectuée par une comparaison entre l’irradiation globale calculée et celui mesuré sur une surface orientée Sud, incliné à 27° et avec un azimut de 20°. Les données des irradiations globales inclinées mesurées sont issues de la banque de données obtenues par le monitoring de la centrale photovoltaïque (PV) connectée au réseau du CDER en utilisant des méthodes à la fois graphiques et statistiques. Différents modèles ont été validés par plusieurs indicateurs statistiques pour diverses conditions de ciel. Des systèmes de notation ont été appliqués dans le but de marquer la performance relative de ces modèles. De bons résultats ont été obtenus pour le cas de l’irradiation globale inclinée, avec une erreur ne dépassant pas les 10%. Les modèles de Muneer et Ma-Iqbal donnent des résultats appréciables pour l’estimation de l’irradiation globale inclinée pour un ciel sans nuages et ceux de Ma-Iqbal et Klütcher pour un ciel très nuageux.
Analyse de cycle de vie du bioéthanol
Authors: Allouache Amina , Aziza Majda Amina , Ahmed Zaid Toudert
Published: December 2023

L’économie mondiale actuelle doit faire face aux problèmes de pénurie et de pollution des énergies fossiles. Dans ce contexte, la conversion de la biomasse en biocarburants semble être une solution de choix pour pallier à ces problèmes. Le bioéthanol est le biocarburant le plus consommé dans le monde, il est produit par fermentation à partir de matières riches en sucre ou en amidon comme le blé, maïs, canne à sucre. Cependant, la concurrence avec les produits alimentaires qu’il a engendrés à pousser les industriels à abandonner l’utilisation des produits alimentaires à large consommation pour se tourner vers de nouvelles matières non conventionnelle comme les caroubes. Cette étude propose une analyse du cycle de vie de la production d’un bioéthanol fait à partir de gousses de caroubes. Ces dernières représentent une excellente matière pour la production du bioéthanol puisqu’elle est riche en sucre, économique, abondante, et ne concurrence aucunement les cultures alimentaires. Les résultats montrent une grande efficacité énergétique puisque le système produit environ le triple de l’énergie consommée.
Numerical study of the transient heat and moisture transfer through the single and double walls
Authors: Tamene Youcef , Abboudi Said , Bougriou Cherif
Published: December 2023

In this work, a numerical study of a coupled transient heat and moisture transfer was realized. The program developed is simple compared with those developed by other researchers in the literature. We have exploited it, to compare the evolution of temperature and the moisture content for simple and double layers walls of the same type and the same thickness in order to resolve the interface problem, then the influence of some boundary conditions was explored in order to see their impact on temperature and moisture evolution through two layer materials.
Estimation de la puissance énergétique éolienne à partir de la distribution de Weibull sur la côte béninoise à Cotonou dans le Golfe de Guinée
Authors: Houekpoheha Mathias Adjimon , Kounouhewa Basile Bruno , Tokpohozin Bernard Noukpo , Awanou Cossi Norbert
Published: December 2023

La situation énergétique au Bénin est caractérisée par un faible taux d’accès à l’électricité et une dépendance quasi-totale vis-à-vis de l’extérieur en énergie électrique. Sur la côte béninoise dans le Golfe de Guinée, on observe la propagation d’un vent quasi permanent et régulier. Une solution avantageuse pour le Bénin et la Sous-région est la récupération et la transformation de l’énergie éolienne en énergie électrique. En utilisant la distribution de Weibull [1] et la distribution logarithmique du vent dans l’atmosphère [2], nous avons défini la densité de distribution du vent sur la côte béninoise à Cotonou et exprimé le potentiel énergétique éolien. A partir de ces expressions et utilisant les mesures faites p le Millénium Challenge Account (MCA-Bénin) en 2011 dans le cadre du projet d’extension du Port Autonome de Cotonou et les données obtenues auprès de l’ASECNA, nous avons fait une estimation du potentiel énergétique éolienne sur la côte du Bénin.
Le cuiseur solaire stationnaire à CPC asymétrique- Analyse éxergétique expérimentale
Authors: Harmim Arezki , Merzouk Mustapha , Boukar Mebarek , Amar M’hammed
Published: December 2023

Le prototype du cuiseur solaire stationnaire à concentrateur parabolique composé ‘CPC’ asymétrique a été caractérisé expérimentalement en suivant les recommandations du standard international de test et d’évaluation des cuiseurs solaires. La compagne des tests expérimentaux a été conduite sous les conditions réelles à Adrar et en période hivernale. Sa puissance standardisée est de 78.9 W et ses rendements, énergétique et éxergétique, sont également évalués. Lors du chauffage à l’ébullition de 5 litres d’eau de 11 h 30 à 14 h 30; son rendement énergétique décroît linéairement de 26.5 % à 5.3 % et son rendement éxergétique varie entre 0.38 % et 2.43 %. Comparés à d’autres cuiseurs solaires, notre prototype est efficace et ergonomique. De nouveaux indices de performance de cuiseurs solaires sont également proposés.
Solar desalination via multiple tray distillation
Authors: Diaf Abderrahmane
Published: December 2023

Small scale desalination of brackish water by distillation using solar energy is a clean, economical and technically competitive solution for small scale production of fresh/distilled water in remote areas. Regions of prime relevance are those characterized by lots of sunshine and readily available brackish water resources, the likes of the vast expanses of the greater In-Salah Sahara desert area. In this work we present an experimental study of a new concept of solar desalination.
Comparative assessment of two different designs of box solar cookers under algerian sahara conditions
Authors: Yettou Fatiha , Azoui Boubekeur , Malek Ali , Panwar Narayan Lal , Gama Amor , Arrif Toufik , Merarda Hakim
Published: December 2023

This paper deals with the experimental study of two box-type solar cookers equipped with booster mirrors and suitable for cooking a single family’s food. The first one has a conventional, ordinary horizontal aperture area and the second one has an inclined aperture area. The latter is a new configuration which allows for much higher solar radiation interception, resulting in better cooking performance, especially in the winter when the sun’s elevation is low. Optimum inclination angles of the booster mirrors were calculated in order to maximize the reflection of the solar rays on the absorber plates. The cooking performance of the proposed new cooker was compared with the conventional box solar cooker of the same material and surface during Winter 2013 in the Ghardaîa Sahara climate (32.39°N, 3.78°E), Algeria. According to the values of some essential thermal performance parameters suggested by International Standards and evaluated by experimental studies, the inclined aperture area improves the thermal performance of the box-type solar cooker remarkably, reducing cooking time considerably. The first and second figures of merit for the improved cooker, respectively, were 0.15 and 0.47 compared to 0.13 and 0.38 for the conventional cooker.
Theoretical and numerical approaches of a plane, laminar and non-confined, impinging jet
Authors: Aliouali Abdelouahid , Talbi Kamel , Kadja Mahfoud
Published: December 2023

We propose in this paper, a numerical study of a planar impacting jet flow. The flow is assumed isothermal, laminar and unconfined. The developed computer code is based on the finite volume method, which was used to discretize the N-S equations. The code allowed us to simulate the physical phenomenon’s taking place in the jet flow. The work focuses, on the description of the evolution of the jet and the presentation of the different characteristics of the flow, for different values of the Reynolds number and the impacting height. Calculations were made for values of the Reynolds numbers ranging from 0.01 to Re = 2000, i.e. in the limits of laminar flow regime, and for values of the ratio between the height of the outlet nozzle-impact surface of 0.1 to 20. The theoretical and numerical approaches of this work are confronted with the experimental works of Sholtz et al., [2].
QBD APPROCH BASED DEVELOPMENT OF VALIDATED ANALYTICAL METHOD FOR ESTIMATION OF CLARITHROMYCIN BY RP-HPLC
Authors: Biradar Vinod R. , Charde M. S. , Chakole R. D.
Published: December 2023

Based on QbD, a chromatographic technique for estimation of clarithromycin from bulk was developed and validated.The method for analysis of clarithromycin is obtained by QbD trial optimization. For the QbD approach Mobile phaseand flow rate are chosen as factors. While two responses were taken i.e.retention time and the peak area, the researchwas carried out using Design of Expert software. Response 1 RT outcomes are F- Value 145.44, P-Value less than 0.05,predicted & adjusted R2are 0.9570 & 0.9763 respectively. Response 2 Peak Area outcomes are F- Value72.09, P-Valueless than 0.05, predicted & adjusted R2 are 0.8777 & 0.0.9104 respectively. The optimized batch was carried out byHPLC gradient system with auto-injector using UV (DAD) detector which had C18 quaternary gradient column at roomtemperature. The mobile phase was ACN: Water (09:91) with a flow rate of 0.9 ml/min. The sample was detected at awavelength 209 nm and the sample size was 20μl. According to ICH guidelines, the purpose of method validation is todemonstrate the acceptability of an analytical technique for its intended purpose. The validated parameter includes therecovery study found (% RCVD -100), Linearity regression (0.999) which obtained a parallel calibration curve,repeatability (RSD%-0.26) and LOD & LOQ were found at 9.206μg/ml & 27.898μg/ml respectively. Acid, base,H2O2, and neutral were used in the stress degradation investigation. The degradation with acid (5.08%), base (96%),H2O2 (32.14%), and neutral (3.42%) were found. The developed approach is used to analyze clarithromycin inpharmaceutical formulations and is unique and accurate.
INVESTIGATING THE MICROBIOTA OF SOLAR SALTERN OF MULUND, MUMBAI, INDIA
Authors: Bhong Ramdas , Pathak Anupama
Published: December 2023

Solar salterns, located in tropical and subtropical areas worldwide, are artificial shallow ponds for the production ofhalite (NaCl) from seawater. They are often built as multipond systems. Multi-pond solar salterns have been widespreadenvironments for studies on halophilic microorganisms. In the present study Archaeal and bacterial diversity of thesalterns located at Mulund (19°10’12’’N, 72°57’18’’E), Mumbai was investigated. Three Halophiles were isolated fromthe brine samples collected. All isolated archaea were shown intensely orange pigmentation. These salt tolerantorganisms were characterized using morphological, biochemical and 16S rRNA analysis. Phylogenetic analysis of thesesequences revealed a range of identities to several group of bacteria. The clones fell into major lineages theActinobacteria and firmicutes. Presence of industrially important carotenoids producing halophiles were also recorded.
IMPEDANCE SPECTROSCOPY GENETIC PROGRAMMING (ISGP) ANALYSES SETTING PROPER WORKING CONDITIONS OF A POLYMER ELECTROLYTE MEMBRANE FUEL CELL
Authors: Bar Nimai , Pandit Rajkamal
Published: December 2023

This study demonstrates application of Impedance Spectroscopy Genetic Program (ISGP) for the investigation of a polymer electrolyte membrane fuel cell (PEMFC). It further demonstrates the procedures to optimize the operating conditions of a single cell in a test station. To do that, the effects of temperature, hydrogen/air, and dew point temperature (DPT) on the cell were examined using an Arbin test station. ISGP followed a two-iteration procedure. First, find an out-of-range peak (at high frequencies) that corresponds to the ohmic (series) resistance of the system. Second, finding the models after subtracting the ohmic resistance from the real part of the measured spectrum. This two- step procedure allows solving a Fredholm equation of the second kind with a reasonable accuracy. The resulting peaks making the distribution function of relaxation time (DFRT) were partially assigned to different physical processes in the PEMFCs. ISGP seeks for a distribution of relaxation times that has the form of a peak or a sum of several peaks, assuming the Debye kernel, where each peak is represented by a known analytic function. As a part of the analysis, the peak areas, which correspond to the contribution of the relevant process to the total impedance, were calculated obtaining tendentious behavior depending on the changing environmental parameters. ISGP of PEMFC results in three peaks. The optimized conditions were found to be the ratio of gas flow fuel to air rate 1:7, fuel cell temperature 60°C and dew point temperature 50°C.
SUSTAINABLE TECHNOLOGY FOR RECALCITRANT AZO DYES BY FUNGAL SPECIES ISOLATED FROM INDUSTRIAL EFFLUENT
Authors: Pandya Pragna , Pandya Aditee
Published: December 2023

Synthetic dyes have a repugnant effect on the aquatic ecosystem and their venomous components have to be removed from the effluent before their exemption. The decolourization of synthetic dyes by fungi is emerging as an effective and clean technology. Fungal-abetted processes are amongst the finest approaches for transformation, degradation and decolourization of recalcitrant dyes. This study was carried out to find out the qualities of textile effluents with the estimation of physicochemical parameters of textile effluents, isolation and identification of fungi. The physicochemical parameters were demarcatedas per the standards prescribed by CPCB.15 fungi isolated from textile effluent and effluent- contaminated soil samples were evaluated to decolourize textile dyes - Reactive Red ME-4B and Brill blue-R. 9 different fungal species were further identified as Aspergillus spp, Penicillium spp, Mucor, Curvularia spp, Helmintho sporium spp, Fusarium spp, Trichoderma spp, Rhizopus, spp and Alternaria spp by 18S rRNA Sequencing. These 9 isolates with potential decolourization were assessed via primary and secondary decolourization. The study also showed that Penicillium spp, Aspergillus spp and Trichoderma spp are highly efficient in decolorizing (85.41, 98.80and83.23 %) in 6 days as used in the present investigation. The results have demonstrated the potential of the fungal isolates for the treatment of dyes contaminated textile effluent.
DOCKING STUDIES OF INDOLE ASSIMILATED PYRAZOLINE MOLECULAR HYBRIDS: DESIGN, SYNTHESIS AS ANTIINFLAMMATORY AGENTS AND ANTICANCER AGENTS
Authors: Nattava Prasanna Lakshmi
Published: December 2023

A series of novel compounds (4a-4l) have been synthesized by Claisen-Schmidt condensation, Schiff’s base and Cyclization mechanism. All the molecule structures were affirmation by IR, 1H NMR and Mass spectral data. The synthesized hybrids were screened for in vivo anti-inflammatory and invitro anticancer activities. Ant inflammatory activity was performed using carrageenan induced rat paw edema method using Diclofenac as standard drug. The anticancer activity has been assessing by using MTT assay against MCF7 and SKOV3 cell lines and Doxorubicin was used as reference standard. Among the compounds compound 4l exhibited the highest % inhibition of 98.4 when compared with the standard Diclofenac 94.2%.Compound 4f exhibited the lowest IC50 at concentration of 20.01µg against MCF7 cell lines and 32.87µg against SKOV3 cell lines. The molecular docking studies was performed using the Ligprep tool of Schrodinger suite. This study revealed that novel thiazolidne-4-one-pyrazole hybrids(4a-4j) had good interaction with the active site of EGFR receptor. Among the docked compounds, dock score of the compounds ranged from from -3.186 to -5.212. The highest score was exhibited by 4f with -5.212 with Glide binding energy of -34.697 Kcal/mol.
DEVELOPMENT AND VALIDATION OF VISIBLE SPECTROPHOTOMETRIC METHOD FOR ESTIMATION OF ELTROMBOPAG OLAMINE IN BULK AND TABLET DOSAGE FORM
Authors: Sreelatha Gangu , RG Sai Chaitanya , Harshana T , Spandana Y. Divya , Reddy Y. Abhishek
Published: December 2023

A simple and sensitive visible spectrophotometric method has been developed for the quantitative estimation of Eltrombopag Olamine in its bulk and tablet dosage form. It is an orally active ethanolamine salt of Eltrombopag, a smallmolecule, nonpeptide thrombopoietin receptor agonist with megakaryopoiesis-stimulating activity. The maximum absorbance of drug was found at 425nm. Eltrombopag Olamine was found to be dissolved in Methanol so it was used as solvent for the conduction of work. Linearity range for the method was finalized as 3-18 μg/ml with R2 value of 0.9995. % RSD less than 2 which is well within indicates the method is precise and robust. The % recovery rate was found to be 100-101% indicating the method’s accuracy. The method was validated as per ICH guidelines provided and the results were found to be satisfactory. LOD & LOQ values were obtained as 0.150 & 0.456 respectively. Stability studies shows that the drug is unstable in various stress conditions like acid, base, water and oxidation.
The impact of conduction anesthesia at the hemostastic system in the limb reperfusion syndrome in pediatric traumatology-orthopedic practice
Authors: Chekhova Olga G. , Ostanina V. A. , Shmakov A. N.
Published: December 2023

Introduction. Activation of the hemostatic system in the ischemia-reperfusion syndrome is a risk factor for thromboembolic complications during orthopedic surgical interventions associated with arterial tourniquet application. Therefore, it is relevant to find ways to mitigate reperfusion effects during such surgeries.
Purpose. To find out character and effects of conduction anesthesia at the thromboelastogram parameters in the ischemic limb reperfusion after removing a tourniquet during orthopedic surgeries in children.
Material and methods. The surgery which was performed in 20 patients from the traumatologic department in the City Children’s Clinical Emergency Hospital (Novosibirsk) required arterial tourniquet application. So, these patients were enrolled in the observational pilot study. The patients who had tourniquet application were distributed into two groups by the block randomization: Group 1 (n=10) – peripheric blockage; Group 2 (n=10) – no peripheric blockage. The basic technique used in the study was thromboelastography (TEG) with TEG5000 thromboelastograph (Haemonetics Corporation, USA). All patients had thromboelastography before tourniquet application (stage 1) and 5 minutes after its removal (stage 2). Main thromboelastogram parameters were assessed: R, measuring pathways for coagulation phases I and II; K – time, characterizing coagulation phase III; angle α, duplicating the information of “K” indicator; MA is the maximum amplitude of TEG branch divergence, characterizing the clot density which, in turn, depends on the function of platelet activity and on the amount of fibrinogen; LY30 is the percentage of clot lysed in 30 minutes.
Results. In the group with regional anesthesia, indicators R, K, angle α, MA did not change at stage II; LY30 index decreased at stage 2. In the group without regional anesthesia, but with powerful central analgesic, indicators R, K, MA decreased, and angle α and LY30 increased at stage 2.
Conclusion. In pediatric orthopedic surgeries with arterial tourniquet application , local anesthetic (Ropivacaine) in the conduction anesthesia technique prevented activation of the hemostastic system.
Late diagnostics of Hirschsprung’s disease in a 17-year-old girl: a clinical observation
Authors: Petrov Dionisiy A. , Shcherbakova Olga V.
Published: December 2023

Introduction. The congenital absence of nerve ganglia in the intermuscular and submucosal nerve plexuses of the colon in Hirschsprung’s disease leads to impaired motility and the risk of intestinal obstruction. Most often, Hirschsprung’s disease diagnosis is put in the neonatal period or in early childhood. Rare cases of late diagnostics may be associated with a blurred clinical picture, as well as with delay in histological verification of aganglionosis.
Clinical observation. This clinical observation describes a case of 17-year-old patient who was admitted to the surgical department with complaints on the lack of independent stool, a large fecal stone, abdominal pain. The patient could not have the self-emptying stool since her birth. Conservative therapy had only a partial positive effect. Irrigography findings caused a suspicion on agangliosis pathology of the rectosigmoid colon; however, histological verification of the diagnosis has never been made. Immunohistochemical examination of bioptats of the rectal mucous for calretinin had confirmed the Hirschsprung’s disease, and the first stage of surgical treatment was performed – resection of the sigmoid colon section with a fecal stone and descendostomy formation. Radical surgery was postponed because of patient’s pregnancy.
Conclusion. Late diagnosis of Hirschsprung’s disease is still a problem even in classical forms of the disease. It is important to be alert in older children and adults with a history of long-lasting constipation. Morphological examination of the neural ganglia of the colon is a key point in verifying the diagnosis.
Surgical treatment of a newborn child with congenital aplasia of the scalp
Authors: Bardeeva Ksenya A. , Mishkin V. V. , Pisklakov A. V. , Ponomarev V. I. , Pavlenko N. I.
Published: December 2023

Introduction. Skin aplasia is a developmental defect represented by a skin defect of varying extent, often in combination with the defect of underlying tissues – subcutaneous fat, muscles and with various forms of dysraphy - non-closured embryonic slits. By various authors, defect frequency ranges from 1 per 1 000 to 1 per 10 000 newborns. Congenital focal aplasia of the skin and subcutaneous tissues can be located in limited areas; most often it is diagnosed on the scalp looking like single or multiple focal skin defects. Quite often, focal aplasia also affects the skin on the trunk and limbs.
Description of observation. The article presents a clinical case of congenital focal aplasia of the scalp and skull bones in a newborn child. This type of skin congenital aplasia by I. Frieden classification corresponds to Group I of congenital aplasia of the skin with lesions on the scalp. At the expert examination with multispiral computed tomography, the absence of parietal bone was diagnosed. So, the defect bottom was dura mater. In this case, the authors considered conservative approach to be unacceptable because of long period of healing and high risk of secondary infection. The performed surgery has led to a satisfactory cosmetic result. The state of bone structures was assessed catamnetically.
Conclusion. Modern diagnostic techniques have proven that an active surgical tactics in children with congenital aplasia of the scalp is justified.
Essentials of Employee Safety Measures in Organization
Authors: Francina V. Jothi , S. Naveenkumar , K. R. Sushmitha Raj
Published: December 2023

The Occupational Safety Act of 2007 was established after multiple amendments to the Manufactories Act of 1951. These amendments expanded its scope beyond just industrial workplaces, applying to all working environments and individuals, whether temporary or permanent employees. The main objective of this Act is to ensure the safety and well-being of individuals at work, as well as providing protection to non-employees who may be affected by work-related hazards. Employers are obligated to comply with all safety regulations, rules, instructions, and procedures outlined in the Act. They must take necessary precautions to safeguard their own safety, as well as that of their employees, by implementing appropriate systems of work, preventive measures, and control mechanisms.The purpose of this study is to examine the safety measures implemented by a mining company for its workers. The aim is to assess the level of satisfaction among workers regarding these safety measures. The analysis and findings from this study will be valuable in improving the existing safety measures. Ultimately, the results will contribute to an overall sense of satisfaction among the workforce in relation to the company's safety practices.
The pH of Drinking Water and Its Human Health Implications: A Case of Surrounding Communities in the Dormaa Central Municipality of Ghana
Authors: Arhin Emmanuel , Osei Jeff Dacosta , Anima Prisca Ama , Afari Peter Damoah- , Yevugah Lily Lisa
Published: December 2023

Of all the things to consider about safe water, the pH of drinking water probably has been overlooked. Most spoken about, however, is alkaline water which has a host of supposed health benefits? For instance, it is known to help the body to clear toxins thereby improving metabolism. Meanwhile, research has shown that most diseases, illnesses, and bad bacteria thrive in an over-acidic environment. Additionally, the acidic water indirectly may impact on budget as this would contribute to the metallic or sour taste of drinking water, and stained laundry and provide blue-green staining of sinks and other household fixtures. Acidic water having low pH often are known to contain high amounts of heavy metals. Also, research has found that solutions with low pH are more likely to have heavy metals from the environment. Other researchers have identified that acidic water can be high in Pb, As, Cu, Ni, Cb, Cr, and Zn. All these elements fall under heavy metals and exposure to them can be dangerous, and could lead to heavy metal poisoning and toxicity. This is concerning as water is said to be life and the population within Dormaa Central Municipality is most likely to have symptoms such as diarrhoea, nausea and vomiting, abnormal pains, weakness, shortness of breath, suppression of the immune system, organ damage, and enamel wearout leading to dental cavities. Water samples and their corresponding spatial locations were collected from (how many?) communities within the Dormaa Central Municipality. The potential for hydrogen (pH) readings of the respective water samples was measured using a pH meter. The results obtained range from 0.2 mmHg to 6.5 mmHg.
A Comprehensive Study of Legal Frameworks Shaping Production, Commerce, and Trade in India
Authors: Ramesh S.
Published: December 2023

This article undertakes a thorough and comprehensive analysis of the intricate legal frameworks that govern the spheres of production, commerce, and trade in India. By delving into historical antecedents, addressing contemporary challenges, illuminating success stories, and envisioning future prospects, this study aspires to offer a nuanced and all-encompassing comprehension of the legal underpinnings that intricately mold and regulate the diverse economic activities within the country. Through this exploration, the article endeavors to not only dissect the evolution of legal structures but also shed light on their contemporary impact, thereby contributing to a more profound understanding of the dynamic interplay between law and the economic landscape in India.
this is a scientific work about Pelatihan Pemasaran Digital Dan Pengemasan Produk Untuk Mengembangkan UMKM Sari Jahe Merah Panji Herbal
Authors: Putu Agus Adnyana  , I Made Mai Noval  , Ni Wayan Novi Budiasni  , Anak Agung Ngurah Restu Gautama  , Ketut Simon Ariasa  , Putu Trisna Adi Putra
Published: December 2023

Program pengabdian ini dilakukan dikelompok wanita tani tulus bakti desa panji kabupaten buleleng yang bergerak pada pengeloaan sari jahe merah, program Pengabdian Kepada Masyarakat ini berorientasi untuk dapat membantu UMKM kelompok tani tulus bakti di desa panji kabupaten buleleng, untuk mengembangkan produk herbalnya dari sari jahe merah di bidang pemasarannya dan bisa meningkatkan penghasilan yang diperoleh. Sebelum dilakukannya program pengabdian ini pendapatan perbulan dari kelompok Wanita tani tulus bakti desa panji memperoleh pendapatan sebesar Rp 2.000.000 perbulannya. Setelah dilakukannya program pengabdian ini, pada aspek pemasaran di bidang inovasi pengemasan produk hingga membantu membuat akun media sosial dan melakukan aktivitas pemasaran melalui media sosial. Dimana hal tersebut memiliki pengaruh yang cukup signifikan dengan meningkatnya pendapatan yang diperoleh dari penjualan produk herbal sari jahe merah dan mentahan sari jahe merah, yang meraih omset penjualan perbulannya rata-rata Rp 2.800.000. Dimana hal ini masih bisa di maksimalkan tergantung dari inovasi yang bisa di lakukan oleh pengelola atau dari pihak kelompok Wanita tani tulus bakti desa panji kabupaten buleleng.
A infraestrutura escolar e a educação física: o jugo das políticas educacionais de financiamento
Authors: Ferreira Neto Rubem Barboza
Published: December 2023

O objetivo da pesquisa foi estudar a influência dos recursos econômicos na infraestrutura escolar utilizada pelo componente curricular Educação Física, em cinco escolas públicas municipais dos anos finais do ensino fundamental, da cidade de Armação dos Búzios-RJ, Brasil. A fundamentação teórica da presente investigação possui como alicerce epistemológico o fenômeno da infraestrutura escolar, que será discutido à luz do materialismo histórico-dialético, tendo como contributo a concepção crítico-superadora da Educação Física. Foi utilizada uma metodologia qualitativa (GIBBS, 2009), no formato de estudo de casos múltiplos (YIN, 2001), com os dados sendo apreciados pela análise de conteúdo (BARDIN, 2011). Como técnica de recolha dos dados foram aplicadas entrevistas semiestruturadas a cinco diretores escolares. A análise de conteúdo nos fez chegar a três categorias: recursos econômicos, procrastinação  e investimentos. Os resultados apontam graves distorções e diferentes realidades em relação as políticas de educacionais de financiamento da educação básica das cinco escolas públicas municipais investigadas. Conclui-se que apenas três escolas possuem recursos econômicos oficiais, provenientes de repasses de verbas de programas do governo federal, como o Programa Dinheiro Direto na Escola – PDDE. Por outro lado, outras duas escolas utilizam verbas provenientes de cantina escolar e contam com medidas paliativas e esporádicas da Secretaria Municipal de Educação – SEMED.
Manas Digitais: um caso de sucesso na promoção da equidade de gênero em tecnologia da informação na Amazônia
Authors: Barata Bárbara Adriana Pires , Coelho Marlon Rafael Sousa , Pereira Bárbara Melissa Cordeiro , Lacerda Larissa Bernardes , Homci Marcia Silvia Salomão , Da Silva Gabryella Rocha Rodrigues , Francês Regiane Silva Kawasaki , Couto Danielle Costa Carrara
Published: December 2023

Há uma preocupação mundial com a diminuição do número de mulheres nas áreas da Tecnologia da Informação (TI). Empresas da área têm feito campanhas e lançado programas especiais para mulheres que estão na carreira ou para incentivar jovens que desejem ingressar nessas áreas. As Manas Digitais nasceram com o objetivo de realizar práticas de caráter motivacional e informativo com alunas de Ensino Fundamental e Médio na região metropolitana de Belém do Pará visando aumentar a equidade de gênero em carreiras e cursos das áreas de Computação. Contribuindo também com uma rede colaboração entre profissionais e futuras acadêmicas, dando visibilidade para mulheres da TI da região Amazônica. Este artigo demonstra resultados alcançados pelas Manas Digitais em projetos financiados pelo CNPq/MCTIC e British Council entre os anos de 2019 a 2022. Ao analisar os resultados, considera-se que é possível introduzir conceitos de Lógica de Programação no Ensino Básico de maneira lúdica e divertida. Além de demonstrar ser de extrema importância programas de financiamento para que ações que promovem diversidade possam ocorrer cada vez mais e impactar as próximas gerações de mulheres a ingressar em carreiras de TI, deixando de ser apenas consumidoras, atuando principalmente como produtoras de novas tecnologias.