bluuebunny/crossref_metadata_2025 huggingface dataset:
KOMUNIKASI BUDAYA DALAM TRADISI NGELOWONG MASYARAKAT SASAK WETU TELU DI LOMBOK
Authors: Sudiartawan I Wayan , Sutama I Wayan
Published: November 2022

The Sasak Wetu telu indigenous people are a society that still maintains traditions in an effort to preserve and harmonize natural ecosystems. This tradition is still being carried out even though it is increasingly minimal. The purpose of this article is to describe cultural communication in the ngelowong tradition in the Sasak Wetu Telu indigenous people. The research approach uses descriptive qualitative with field research. Data collection is done by observation, documentation, and interviews. The results of the study show that cultural communication in ngelowong by the Sasak indigenous people is an expression to maintain existence, to maintain harmony with nature. Ngelowong is carried out by using natural means as an effort to ward off disturbances or pests to the plants in the fields.
The effectiveness of liquid chelated fertilizer forris on flax crops in the conditions of the Central region of the Non-chernozem zone
Authors: Сорокина О.Ю. , Кузьменко Н.Н. , Ильина В.И.
Published: November 2022

Результаты проведенных в 2019 – 2020 гг. исследований в условиях Центрального района Нечерноземной зоны на дерново-подзолистой почве показали высокую эффективность применения под лен-долгунец жидкого хелатного удобрения Форрис. Наиболее высокая урожайность льнопродукции получена при сочетании обработки семян и посева в фазе «елочка». Применение удобрения Форрис оказывало положительное влияние на ростовые процессы льна, улучшало морфологические показатели, что позволило увеличить урожайность льносоломы на 10,5 и 9,8 ц/га (27 и 23%), льносемян – на 1,1 и 1,2 ц/га (18,3 и 18,7%), соответственно, на фоне применения 1,0 и 3,0 ц/га азофоски. Большая доля участия в увеличении урожайности приходится на обработку семян: 18,0 и 16,8% по льносоломе и 5,0 и 7,8% – по семенам соответственно дозам минерального удобрения. При большей дозе минерального удобрения (3,0 ц/га азофоски) эффективность Форрис на урожайность льносоломы снижается, а семян повышается.

The results of the studies carried out in 2019 – 2020 in the conditions of the Central district of the Non-Chernozem zone on sod-podzolic soil showed high efficiency of the use of liquid chelated fertilizer Forris for flax. The highest yield of flax products was obtained by combining seed treatment and sowing in the "fir" phase. The use of Forris fertilizer had a positive effect on the growth processes of flax, improved morphological indicators, which allowed to increase the yield of flax straw by 10.5 and 9.8 c/ha (27 and 23%), flax seeds – by 1.1 and 1.2 c/ha (18.3 and 18.7%), respectively, against the background of the use of 1.0 and 3.0 c/ha azofoski. A large share of participation in the increase in yield falls on seed treatment: 18.0 and 16.8% for flax and 5.0 and 7.8% for seeds, respectively, doses of mineral fertilizer. With a higher dose of mineral fertilizer (3.0 c/ha azofoski), the effectiveness of Forris on the yield of flax straw decreases, and the seeds increase.
Uptake of Ruthenium Bearing Waste by Co-Precipitation using Lead Sulfide as Scavenger
Authors:   Centralized Waste Management Facility, Bhabha Atomic Research Centre Facilities Kalpakkam (Tamil Nadu), India., Mishra Ajay Kumar , Panigrahi B S ,   Indira Gandhi Centre for Atomic Research, Kalpakkam (Tamil Nadu), India.
Published: November 2022

During the fission of Uranium for generating electricity, fission products are produced. Ru-106 is one among them. In the decontamination of nuclear components using decontaminating agents like EDTA, NDA, oxalic acid etc, Ruthenium gets complexed and the waste generated as liquid contains Ru-106 in the complex state. It is necessary to free Ru-106 from the complex by oxidation of the complex. This will generate Ruthenium effluent with Ru-106 in the free state amenable for further treatment. An attempt has been made to co precipitate Ruthenium along with lead sulphide. The optimum pH, dosing of chemicals needed for in situ precipitation of lead sulphide were estimated in the batch study. Column studies using lead sulphide on polyurethane foam as column material were carried out for the treatment of Ruthenium bearing effluent. The optimum flow rate for maximum removal of Ruthenium was found to be 20 BV/h. Under optimized condition the max removal of Ruthenium was found to be 84% in the batch study, and 80% in the column study.
Are Economic and Objective Indicators Sufficient to Determine Life Satisfaction? An Empirical Investigation
Authors:   Ph.D. Scholar, Department of Economics, Marmara University, Istanbul, Turkey., Shah Zubair Arif
Published: November 2022

Human values and experiences have generally been ignored in determining the life satisfaction of citizens. This paper empirically tests the relationship between the dependent variable of life satisfaction with explanatory variables like income, health, educational level, religiosity, and democratic values. The data is taken from the World Value Survey with a sufficiently large sample size. The analyses of descriptive statistics and Spearman's rank-order correlation is followed by the main analysis within the framework of the Ordered Logistic Regression model. The results reassert the importance of values and human experiences in policymaking.
An incompletely known Vascellum from India
Authors: Bisht Dipika , Sharma J. , Das K.
Published: November 2022

In the present communication Vascellum endotephrum (Pat.) Demoulin & Dring known incompletely from India and a new record from Western Himalaya is described in detail and illustrated.
Studies on the effect of autumn fungal diseases of mulberry and their impact on cocoon production in Doon valley
Authors: Mishra Ritesh , Kant Rama , Sachan S. , Mishra P. , Chakrabarti S.
Published: November 2022

Mulberry is the sole food plant of Silkworm (Bombyx mori L.). The success of Silkworm depends on the Mulberry leaf quality and climate. Damp and humid condition of the Doon valley promotes the development of pathogenic fungi. A survey on the incidence and severity of foliar fungal diseases of Mulberry during autumn period was conducted in the Doon valley at RSRS, Sahaspur, Dehra Dun. Incidences of major diseases viz., powdery mildew (Phyllactinia corylea), leaf spot (Cercospora moricola), leaf rust (Cerotelium fici), and leaf blight (Fusarium solani) were recorded during autumn season (September to November). Leaf spot disease was found mainly (PDI, 8.7 and DI%, 32.0%) in October, 2003 during autumn season at RSRS, Sahaspur, Dehra Dun and followed by September (PDI, 7.5 and DI%, 19.7%). Leaf rust was also observed during September as minor disease (PDI, 1.6 and DI%, 5.3%), whereas the same disease was found as major disease in other traditional areas like Karnataka and West Bengal. The severity of powdery mildew disease was observed in the month of November (PDI, 34.9 and DI%, 79.9%). Disease severity and weather parameters have also been discussed.
Multiligamentous Knee Injuries: Acute Management, Associated Injuries, and Anticipated Return to Activity
Authors: Smith Mark P. , Klott Jeff , Hunter Pete , Klitzman Robert G.
Published: November 2022

Multiligamentous knee injuries (MLKIs) are devastating injuries. The energy and severity of these injuries encompass a wide range from low-energy single-joint mechanisms to high-energy polytrauma settings. Currently, there is no consensus on surgical treatment approach, surgical timing, or the return to preinjury activity levels after injury. There does appear to be a difference in the rate of return to activity and level of activity based on whether the injury was sustained during sport, in a trauma setting, or while on active military duty. The purpose of this descriptive review was to summarize current concepts related to (1) the acute management of MLKIs; (2) the effect of concomitant neurovascular, meniscal, and chondral injury on MLKI outcomes; (3) the effect of surgical versus nonsurgical treatment of MLKI on outcomes; and (4) rates and predictors of return to sport, work, and active military service after an MLKI.
Orthopaedic Manifestations of Neurofibromatosis Type I
Authors: Evans Timothy J. , Wang Xia , Binitie Odion
Published: November 2022

Neurofibromatosis type 1 (NF1) is a congenital disease which is caused by mutations in the NF1 gene on chromosome 17, resulting in an altered function of the neurofibromin protein. Owing to the ubiquitous expression of this protein, this syndrome is associated with pathology in many organ systems of the body, especially the central and peripheral nervous, musculoskeletal, and integumentary systems. This review outlines the common sequelae related to a diagnosis of NF1 and the common treatment approach to each.
Reduced Costs, Complications, and Length of Stay After Arthroscopic Versus Open Irrigation and Débridement for Knee Septic Arthritis
Authors: Upfill-Brown Alexander , Shi Brendan , Carter Matthew , Maturana Carlos , Brodke Dane , Shah Akash A. , Hsiue Peter , Photopoulos Christos , Lee Christopher , Stavrakis Alexandra
Published: November 2022

Background:

In the treatment of native knee bacterial septic arthritis, the optimal irrigation and débridement modality—arthroscopic versus open—is a matter of controversy. We aim to compare revision-free survival, complications, and resource utilization between these approaches.

Methods:

The National Readmission Database was queried from 2016 to 2019 to identify patients using International Classification of Diseases, 10th revision, diagnostic and procedure codes. Days to revision irrigation and débridement (I&D), if any, were calculated for patients during index admission or subsequent readmissions. Multivariate regression was used for healthcare utilization analysis. Survival analysis was done using Kaplan-Meier analysis and Cox proportional hazard regression.

Results:

A total of 14,365 patients with native knee septic arthritis undergoing I&D were identified, 8,063 arthroscopic (56.1%) and 6,302 open (43.9%). The mean follow-up was 148 days (interquartile range 53 to 259). A total of 2,156 patients (15.0%) underwent revision I&D. On multivariate analysis, arthroscopic I&D was associated with a reduction in hospital costs of $5,674 and length of stay of 1.46 days (P < 0.001 for both). Arthroscopic I&D was associated with lower overall complications (odds ratio [OR] 0.63, P < 0.001), need for blood transfusion (OR 0.58, P < 0.001), and wound complications (OR 0.32, P < 0.001). Revision-free survival after index I&D was 95.3% at 3 days, 91.0% at 10 days, 88.3% at 30 days, 86.0% at 90 days, and 84.5% at 180 days. No statistically significant difference was observed between surgical approaches on Cox modeling.

Discussion:

Risk of revision I&D did not differ between arthroscopic and open I&D; however, arthroscopy was associated with decreased costs, length of stay, and complications. Additional study is necessary to confirm these findings and characterize which patients require an open I&D.

Level of Evidence:

III
Analisi progettuale di politiche nazionali concorrenti dal punto di vista del federalismo
Authors: Terese Sanci
Published: November 2022

Il documento propone un approccio per analizzare la congruenza del disegno di una politica nazionale concorrente con il federalismo. Oltre alla teoria federale, due elementi fondamentali per questa analisi sono la struttura e le categorie di funzionamento. Il primo si riferisce alla struttura formale di un sistema federale e il secondo al suo previsto funzionamento come federalismo. Tale comprensione consente di identificare i tratti distintivi del disegno di politiche nazionali concorrenti in un sistema federale e di costruire un modello di analisi chiamato prospettiva federalista. La tesi argomentata è che in un sistema federale gli enti federati, in quanto parti riconosciute di esso, possono partecipare di diritto al disegno di politiche nazionali concorrenti. Questa partecipazione è fondamentale per definirli federali.
Christian Religious Education in the Family: Benefits and Uses for the Millennial Generation
Authors: Tobing Leonard Lumban
Published: November 2022

Christian Religious Education, from now on referred to as family PAK, is a very important education for all family members. Through family PAK, that can be done with worship, with the aim that all family members can know and understand God who is worshiped and enable the whole family to live according to God's word and can be an example for others. Family PAK is an important task for parents as individuals who are given the responsibility by God to teach it. Not only parents but all family members who are there must support each other and carry out PAK in the family; therefore, it takes commitment from the whole family so that family PAK can be realized. Given how many children choose the wrong path (not in the presence of God) to take actions that are not commendable, the child's future will be disrupted. In this case, how do parents give time to teach their children through worship, stories, and conversations. This writing aims to see the extent to which the benefits and objectives of PAK are carried out in the family to anticipate the progress of the era, which greatly influences the human mindset.
Vardagsteologi och tonårsmagi
Authors: Rubenson Karin
Published: November 2022

Everyday Theology and Teenage Magic: Approaching an Ethnographic-Theologic Research Method with the Aid of Children’s Literature
The aim of this article is to explore how ethnographic theological method can be understood, by relating it to fantasy literature for children and young people. I am discussing children’s theological agency, focusing on relationality, hybridity and changeability, showing how children’s literature can be used to exemplify practical theological theory and method. 
I will primarily refer to Natalie Wigg-Stevenson’s book Ethnographic Theology: an Inquiry into the Production of Theological Knowledge and the Swedish YA novels about Engelsfors (The Circle, Fire and The Key) by Mats Strandberg and Sara Bergmark Elfgren. I am looking into questions about knowledge as contextual, embodied and relational and how uncertainty and liminality can enable, rather than hinder, action. I am using concrete examples from the novels, such as a magical book and a “body switch” episode, where the characters are magically transformed to each other, to discuss how interaction and interpretation are dependent on embodiment and context. 
By relating the novels to Wigg-Stevenson’s understanding of ethnographic theology, I am discussing the fluidity and uncertainty inherent in practical and ethnographic theology, children’s possibilities for agency in complex situations and children’s literature as a tool to understand and explain a research process in the field of ethnographic theology.
Simulation numérique d'un bruleur à biogaz destiné aux moteurs Stirling
Authors: Alliche Ridha , Announ Mohamed , Kermezli Tayeb
Published: November 2022

The design of a biogas burner for Stirling engines depends on its ability to provide a sufficient heat which is not produced by conventional burners because of the limitation of the contact surface between flame-hot head and the low methane content in the biogas. Therefore, a special microscale combustion chamber for this kind of burner is necessary. In this work, we studied numerically the biogas combustion by a Swiss-roll burner in a small-scale combustor. The temperature distribution versus the biogas injection rate is investigated. A significant increase of the flame temperature is obtained with an improvement of the uniformity of the temperature distribution and the burner efficiency.
Retour sur la première expérience de l’hybridation par le solaire PV des centrales de production d’électricité conventionnelles alimentant les Réseaux Insulaires du Grand Sud Algérien
Authors: Khirennas Abdelhamid , Talha Abdelaziz , Kaabeche Abdelhamid , Bakelli Yahia
Published: November 2022

The Algerian electric system consists of the northern interconnected grid, the “Pôle In Salah – Adrar – Timimoun” regional grid and many mini-grids supplying dispersed localities in the Great Algerian South. Although these mini-grids share, as of end-2018, only 4% of the whole country power generation capacity, the huge renewable energies, mainly solar PV, potential availability stimulates, in the framework of the efforts deployed towards a low-carbon energy transition, to integrate PV to existing fossil fuels-based power plants. In this context, this paper presents the first attempt achieved by SKTM, a subsidiary of Sonelgaz, by the integration of PV power plants to the power generation systems supplying Tamanrasset, Tindouf and Djanet localities. Positive outcomes in terms of fuel saving and CO2 emissions reduction which would be retrieved from this first experience are highlighted.
Parameters optimization of heterojunction ZnSe/CdS/CIGS/Si solar cells using SCAPS-1D software
Authors: Belarbi Moussaab , Zeggai Oussama , Louhibi-Fasla Souad
Published: November 2022

It is required to simulate the performance of a photovoltaic solar cell performance to enhance it. Simulation optimization has the benefit of being inexpensive and straightforward, and it allows us to identify the optimum parameters that contribute to the enhancement of the cell. An alternative ZnSe/CdS/CIGS/Si structure has been presented using a solar cell capacitance simulator (SCAPS-1D). This paper aims to increase device efficiency by improving the physical characteristics of the many layers involved in cell realisation. We also tried to investigate the variation of electrical characteristics such as Voc, Jsc, , and FF with the changes in material parameters, notably the absorber layer thickness (CIGS, p-Si) (CIGS, p-Si). On the other hand, the temperature dependency has been simulated to guide device manufacturers to attain higher efficiency in varied temperature circumstances. The calculation result shows that excellent performance can be reached by varying the parameters, and the highest efficiency (24,94 %) of the solar cell can be reached under certain conditions, where the thicknesses of ZnSe, CdS, CIGS, and Si are 0.2m, 0.09m, 1.4m, and 0.6m respectively and for the optimal value of temperature equal to 295K.
Performance Analysis of the Multi-Level Boost Converter (MLBC) connected in a Photovoltaic System
Authors: Bouderres Nacer , Djellad Abdelhak , Kerdoun Djallel , Dekhane Azzeddine , Attoui Issam , Chiheb Sofiane
Published: November 2022

The paper concentrates on a comparison between two DC/DC converters topologies, the conventional Boost and the Multi Level Boost Converter (MLBC), for connecting into PV systems. Several performance criteria are included as part of this comparison process for both converters under varying climatic conditions (irradiation and/or temperature). The DC/DC converters' function is to serve as an interface between PV generator and load. We apply MPPT (Maximum Power Point Tracking) control with duty cycle adjustment using PWM technique for extracting the highest achievable output power from PV generator. The multilevel boost converter (MLBC), which is capable of monitoring and maintaining an equal voltage on all N output levels, along with controlling the input current. MATLAB/Simulink simulation results highlight the performance of the Multi-Level Boost Converter (MLBC) converter topology, to match the GPV voltage to the load.
Conversion of fruit kernels of Algerian date palm (Phoenix dactylifera L.) into biodiesel
Authors: Boulal Ahmed , Benmehdi Elkhadem , Mebarki Rekia , Hadri Kamel , Aroussi Abdelaziz
Published: November 2022

Today, renewable energies have become one of the most important concerns of the countries of the world as a result of the negative effects we have reached on the environment from our use of fossil fuels and the resulting emissions of toxic gases. It is no secret that the fields of renewable energies are very diverse, including those derived from biomass. Researchers in this field seek to diversify bioenergy sources from ethanol, biodiesel, and fuels. Biogas. Accordingly, we conducted this study using date kernel oil as a new source for biofuel extraction, and the results were as follows: oil content of 4 to 5 percent, with a very high acid number of 8.9776, which imposes on us make a reaction of esterification and transesterification. Biodiesel has a 91 percent yield and its properties are close to recognized standards compared to previous studies.
Fuzzy logic concept based MPPT technique for standalone PV system
Authors: Hadjaissa Aboubakeur , Gahgouhi Otmane , Ameur Khaled , Rabehi Abdelhamid
Published: November 2022

This paper presents a study of an Intelligent Maximum Power Point Tracking (IMPPT) system for the Standalone PV system. The proposed MPPT technique is based on a fuzzy control concept (FLC). FLC is easy to design due it doesn’t require precise system knowledge and work well with the nonlinear systems; the obtained results were compared with the famous MPPT method (P&O). According to the obtained simulation results, the proposed method gave good results compared to the P&O technique, these results are shown by the low oscillation and rapid response of the proposed method, which provides the maximum transmission of power to the load.
Optimal Energy Management of Hybrid MicroGrid Using Storage System and Fuzzy-GA Method
Authors: Kouba Nour EL Yakine , Sadoudi Slimane
Published: November 2022

Due to the increase of the demand for electrical power and the gaining of momentum of decentralized electrical production, the importance of microgrids is increasing constantly. Therefore, it is pertinent to understand how microgrids work and develop efficient systems to supervise and manage the produced electrical power. This paper deals with an optimal energy management system (EMS) for multi-sources hybrid microgrid. The investigated hybrid system incorporating Diesel Engine (DE), Photovoltaic generator (PV), Wind farm, Fuel Cells (FCs) and Electrolyzers. The proposed strategy was based on a combined optimal Fuzzy Logic and Genetic Algorithm (GA). The GA have been employed to optimize the scaling factors of fuzzy logic to give better results. The power demand variation was considered as disturbance, where, the optimal Fuzzy-GA was implemented to ensure microgrid balance. The effectiveness of the proposed strategy was demonstrated througth various scenarios, and the behavior of the microgrid was analyzed without and with storage system. The obtained results were compared and the proposed strategy proves the validity as a strong optimization tool that can cope with load variation.
Extraction of electrical parameters for one diode photovoltaic model using quasi-oppositional Rao-1 optimization algorithm
Authors: Lekouaghet Badis , Touil Sid-Ahmed , Boubakir Chabane
Published: November 2022

Usually the model parameters of photovoltaic (PV) cells are unavailable in their datasheet provided by the manufacturers. Hence, the problem of extracting appropriate PV parameters is of high importance, and has been highly attracted by researchers. This paper presents a new method to estimate the parameters of the one diode model (ODM), namely quasi-oppositional Rao-1 optimization algorithm (QORao-1). The present method uses only addition and multiplication operations with a quasi-oppositional-based learning process, in order to improve the exploration capability of the original Rao-1 algorithm. Hence, an attractive amelioration in the Root-Mean-Square-Error (RMSE) values is acquired. Comparative performance analysis demonstrates that the QORao-1 algorithm has better performance in terms of robustness and accuracy while estimating the PV parameters than many well-known algorithms.
Aerodynamic study of a Savonius type vertical axis wind turbine for different axial positions between the blades
Authors: Merouane Habib , Senouci Mohammed , Drai Ismail , Sahnoun Rachid
Published: November 2022

In this work we present a numerical study on the aerodynamic behavior of a vertical axis wind turbine of the Savonius type for different axial positions between the blades (overlap rates a/D). The study focuses on predicting the effect of the axial position of the blades to the torque coefficient and also to determine the dynamic field of the flow around the wind turbine for three cases overlap rates (a/D=0, a/D=0.16 and a/D=0.32). The study of the numerical simulation is carried out using a CFD calculation code with use of the finite volume method for the discretization of the differential equations. The equations governing the flow are solved by the SIMPLE algorithm using the K-epsilon model as the closure model.
A new algorithm described PV module’s behavior under partial shading conditions
Authors: Saber Houssem , Bendaoud Abdelouadoud , Radjeai Hammoud , Rahmani Lazhar
Published: November 2022

The shadowing of a single cell in string leads to reverse bias of the shadowed cell. The cell acts as a load instead of a generator in order to deal with this effect and the hotspots problems, this paper focuses on the design of bypass diodes configuration and the behavior of a PV module (Suntech 85w) under partial shading divided from 36 cells into three parts of 12 cells and each part of these parts behaves like a single module, The effect of shadow has been simulated on this module, based on the transmission of shadow for a single shaded cell, before increasing the number of shaded cells for the same shadow transmittance, and the effect of the shaded on the unshaded module and those in the presence and absence of bypass diodes. The simulation results show that the consequences of the shading phenomena can be limited by this configuration and thus increase the operating efficiency of photovoltaic (PV) systems.
Numerical study to predict optimal configuration of wavy fin and tube heat exchanger with various tube shapes
Authors: Tahrour Farouk , Djeffal Fares , Bordja Lyes , Benmachiche Abdelmoumene Hakim
Published: November 2022

This paper aims to investigate the influence of tube shapes on thermal-flow characteristics of sinusoidal wavy finned-tube heat exchangers. Two row staggered bundle with six geometries of tubes (four flat tube geometries, one oval tube and a circular tube) are analyzed for a range of (1600 Re 4800). The inspection revealed that the heat flux and the pressure drop decrease with the tube flatness for all Reynolds values. However, the oval tube O1 reaches, for all Reynolds values, the lowest values of heat flux and pressure drop. Regarding the global performance criterion, the sinusoidal wavy fins with O1 shaped tubes reached the highest global performance values, being 14.8–24.4% and 31.6–36.3% higher than the fin with F1 and O2 tube geometry, respectively.
Chaos Game Optimization Algorithm for Parameters Identification of Different Models of Photovoltaic Solar Cell and Module
Authors: Zellagui Mohamed , Settoul Samir , El-Bayeh Claude Ziad , Belbachir Nasreddine
Published: November 2022

In order to achieve the optimum feasible efficiency, the electrical parameters of the photovoltaic solar cell and module should always be thoroughly researched. In reality, the quality of PV designs can have a significant impact on PV system dynamic modeling and optimization. PV models and calculated parameters, on the other hand, have a major effect on MPPT and production system efficiency. Because a solar cell is represented as the most significant component of a PV system, it should be precisely modeled. For determining the parameters of solar PV modules and cells, the Chaos Game Optimization (CGO) method has been presented for the Single Diode Model (SDM). A set of the measured I-V data has been considered for the studied PV design and applied to model the RTC France cell, and Photowatt-PWP201 module. The objective function in this paper is the Root Mean Square Error (RMSE) between the measured and identified datasets of the proposed algorithm. The optimal results that have been obtained by the CGO algorithm for five electrical parameters of PV cell and model have been compared with published results of various optimization algorithms mentioned in the literature on the same PV systems. The comparison proved that the CGO algorithm was superior.
Numerical approach of a fully developed flow in a solar collector adapted to the climate of southwest Algeria
Authors: Hami Khelifa , Talhi Abdelkrim , Draoui Belkacem
Published: November 2022

The present work has been conducted with the aim of contribution to the study of heat transfer phenomena in an air solar collector, which deal with transient heat transfer properties and mechanisms.The improvement of heat transfer in the studied system is characterized by the development of the flow between the absorption of cold air and the evacuation of hot air.The equations, which govern the problem dealt with, are those of turbulent and incompressible flows written in Reynolds decomposition for velocity, pressure and temperature, in a mean component and a term of fluctuation, and expressing the conservation of the mass, of the amount of movement and energy.To close the set of transport equations, the turbulence model k-E was used. We will therefore use this model of turbulence with an improved treatment of wall laws (Enhanced wall treatment), with the intention of solving the laminar sub-layer. The simulation results obtained are valid for temperature values between (30 °C - 50 °C) for heating flows between (200 w / m2 - 800 w / m2), the average volume flow obtained is equal to: 0.3 m3/s. These results are essential for the passive heating of buildings and the drying of agrifood products.
Mesures du débit de la rivière Mwogere au moulinet hydrométrique par la méthode des points de vitesse
Authors: Niyonzima J.B. , Hendrick P.
Published: November 2022

Le Burundi comporte plusieurs petits cours d’eau pour lesquels aucune étude hydrologique complète n’a été faite. Notons que l’hydroélectricité est une source d’énergie renouvelable et disponible sur toute l’année. Une étude de mesure de débits été conduite au Burundi, sur le site de Ryamukona. Cette étude vise à présenter les résultats de mesures de débit réalisées au Burundi sur la rivière Mwogere pour l’année 2017. Le débit nominal mesuré est de l’ordre de 1,18 m3/s, en utilisant la méthode des points de vitesse. Connaissant le débit nominal et la hauteur de chute brute de 12 m, mesurée à l’aide d’un GPS, cette étude a alors abouti à la définition du potentiel hydroélectrique du site de Ryamukona, un potentiel estimé à 82 kW environ. Dans la dernière partie de cette étude, on a déterminé la méthode de mesure de débit la mieux adaptée pour le site de Ryamukona, compte tenu des activités d’extraction de Coltan qui sont quotidiennement réalisés le long de la rivière Mwogere. On remarque, que suite à ces activités d’extraction de coltan dans la rivière Mwogere, la méthode de dilution du NaCl n’est pas donc adaptée pour la mesure du débit dans cette rivière.
End of life silicon based photovoltaic panels: A review
Authors: Anas Boussaa Sabiha , Benkrid Abdelhak , Zaourar Boutarek Naima , Ayachi Messaouda
Published: November 2022

Solar energy is a clean renewable energy source. During the electricity production, photovoltaic systems do not generate any waste or toxic emissions. However, if this industry is to truly present a sustainable solution it must account for the photovoltaic solar panels’ end-of-life phase. According to the already installed PV panels and its predicted growth, the amount of waste PV panel is estimated to reach in 2050, 78 million tons. Different researches showed the necessity to recover the photovoltaic waste panels and according to the last issue guideline of the European Union (2012/19/EU), the end of life photovoltaic panels are considered as electronic and electric equipment waste. In this review paper, different recent researches interest of recycling photovoltaic panels will be cited. The several components, which constitute silicon based photovoltaic panels, will be presented. These silicon based photovoltaic panels presented are realizing in researcher center of technology of semiconductor for energetic (CRTSE, Algeria). The materials present in the panels can be recovered and reused using specific methods; once their modules reach the end of their life cycle such as: glass and aluminum, as well as semiconductor materials such as silicon, copper. Finally, we will cite 53 different recycling panels industries.
Etude de performance des modèles large bande pour des conditions de ciel clair: cas de sud de l'Algérie
Authors: Benkaciali Said , Notton G. , Voyant C. , Gairaa K.
Published: November 2022

Le rayonnement solaire global horizontal (GHI) est l’une des principales variables utilisées pour la gestion des installations solaires ; la connaissance de sa répartition géographique et de sa variation temporelle est d'une importance primordiale pour de nombreuses applications. Le cas du GHIcs pour un ciel clair est utilisé comme fonction de normalisation dans de nombreuses prévisions de production solaire. Afin de contourner le manque de mesures au sol, diverses techniques de modélisation peuvent être appliquées pour estimer la composante globale (GHICS). Dans ce travail, cinq modèles ont été testés pour estimer le GHIcs horaire : Yang, Solis, Bird-Hulstrom, ESRA et McClear. Ainsi, un classement de ces modèles est proposé sur la base des indicateurs de performances Les résultats ont montré que les modèles de Bird-Hulstrom, McClear, présentent les performances.
Techno-economic assessment of wind energy conversion systems for power generation for the city of N'Djamena in Chad
Authors: Soulouknga Marcel Hamda , Lucache Dumitru-Dorin , Doka Serge Yamigno , Kofane Timoleon Crepin
Published: November 2022

Around the world, with a significant increase in installed capacity each year, wind power is one of the most profitable forms of renewable energy. In this study, three commercial wind turbines, namely Bonus 300kW/33, Bonus 1MW/54 and Vestas 2MW/80, were selected as large-scale wind power conversion systems (WECS) for the technical evaluation of production electricity for the N'Djamena site in Chad. The economic evaluations of these three WECS for power generation are calculated using the Cost Calculation Technique (PVC). Thus, the results obtained show that the highest capacity factor is 15.29% with Bonus 1MW/54 while the lowest at 11.39% with Bonus 300kW/33. The minimum average cost per kWh is 23 US$ / kWh with the 1 MW/54 Bonus, while the highest cost is 33.8 US$ / kWh with a Bonus of 300 kW / 33.
Analyse Thermodynamique des Isothermes de Sorptions des Figues
Authors: Benseddik Abdelouahab , Bensaha Hocine , Lalmi Djemoui , Benahmed-djilali Adiba , Azzi Ahmed
Published: November 2022

In this study, the hygroscopicity and thermodynamic properties of figs were studied to simulate their hygroscopic behavior during storage and drying. The experimental results were analyzed by the nine models of sorption isotherms. The Peleg model was considered the most appropriate to describe the relationship between the equilibrium moisture content and water activity. The thermodynamic functions such as net isosteric heat sorption, the entropy of sorption, spreading pressure, net integral enthalpy, and entropy were determined. Net isosteric heat of sorption and sorption entropy decreased with increasing moisture content. The heat of desorption is slightly greater than that of adsorption with low moisture content. The integral net enthalpy decreases with the moisture content while the entropy integral net increased. The theory of enthalpy-entropy compensation can be successfully applied to water sorption by fig.
Small-signal modelling and stability analysis of island mode microgrid paralleled inverters
Authors: Bennia Ilyas , Harrag Abdelghani , Dailia Yacine
Published: November 2022

The autonomous operation mode of paralleled inverters in microgrids can be intentional or unintentional in order to ensure the continuity of supply. In this mode the voltage and frequency magnitudes are held by local controllers using droop control, this latter is generally considered to be the most adopted technic for the primary layer in a multilayer control structure due to their main feature of sharing the power equally between inverters, without needing communication infrastructure, the design of droop parameters is very crucial because a bad design can lead to the instability of the system. This paper presents a small-signal analysis for an MG composed of parallel-connected inverters in island mode and controlled using the droop method, aiming to analyze the stability by performing eigenvalues and sensitivity analysis which allows obtaining the behavior of the system, analyze the interaction between the different elements and study the influence of the droop parameters on this later which helps in the design procedure, small-signal model and Simulink block model was developed and simulated. Simulation results show a high correspondence and agreement between the model developed using Matlab Simulink-SimPowerSystem library and the developed small-signal model which confirms the validity of this later.
Contrôle Avancé des Onduleurs Photovoltaïques Connectés au Réseau
Authors: Hassaine Linda , Abadlia Issam , Beddar Antar , Abdoune Fateh , Bengourina Mohamed Rida
Published: November 2022

L’énergie solaire photovoltaïque (PV) est parmi les énergies renouvelables la plus utilisée pour la production de l’énergie électrique. Le point le plus important en ce qui concerne l'intégration des systèmes photovoltaïques au réseau est le convertisseur de puissance, notamment les onduleurs qui ne sont pas tout à fait capables de fonctionner en mode avancé. Les nouvelles techniques en développement permettent d'améliorer les performances des onduleurs en assurant l'intégration correcte des systèmes photovoltaïques en tenant compte des caractéristiques du réseau. D’où, des exigences pour le contrôle avancé de l'onduleur connecté au réseau permettent le contrôle complet de l'énergie photovoltaïque fournie, toute en assurant une bonne qualité d’énergie, un faible Taux de Distorsion Harmonique (THD) des courants injectés dans le réseau et le contrôle de la puissance active et réactive. Ce papier présente, les configurations, la classification et les topologies des différents types d’onduleurs PV connectés au réseau. Un résumé concis des méthodes de contrôle pour les onduleurs monophasés et triphasés est également présenté. Un banc d’essai a été réalisé pour la validation expérimentale des techniques de contrôle proposées et développées.
Study of two-dimensional transient heat transfer through a multi-layers wall: Application to the buildings thermal insulation
Authors: Tamene Youcef , Boulebbina Cherif
Published: November 2022

The two-dimensional transient heat conduction through a multilayers wall made of different materials and thicknesses was numerically resolved. The equations system resolution was carried out by Alternating direction implicit method (ADI). The outdoor and indoor temperatures and the convective coefficients used as boundary conditions in the developed Fortran program were from the Algerian regulatory technical document. After validation of the Fortran program with literature, it was used to studying the influence of different boundary conditions (bottom and top sides), on the thermal insulation in the building, for many configurations of external walls, usually used in building construction at Batna city (Algeria). Results showed that for the configurations that give bad thermal insulation, the conditions imposed on the top and bottom of the wall have practically no influence on the internal temperature of the multilayers wall, however, the opposite is observed for the configurations that ensure good thermal insulation.
Technical and environmental performance of a solar/gas driven absorption chiller using NH3/LiNO3
Authors: Amaris Carlos , Rodriguez Andres , Bourouis Mahmoud
Published: November 2022

This study deals with the evaluation of the technical and environmental operation of solar/gas driven NH3/LiNO3 absorption chillers for malls under the environmental conditions of the city of Barranquilla, Colombia. It involves a sensitivity study on the absorption chillers performance at chilled water temperatures of 12 °C and 6 °C and different solar irradiations. It also includes the share of cooling and CO2 equivalent emissions provided by the absorption chillers considering as a base case the energy consumed by the mechanical vapour compression chillers operating in three selected malls. Results showed that solar energy could provide around 40% and 50% of the total energy required to drive the absorption chillers on a service day. This value could be increased by adding a higher solar panel area, however, the available roof area for solar equipment was a limiting factor. Moreover, the COP and SCOP of the absorption chillers were found up to 0.64 and 0.44, respectively. Additionally, the solar/gas driven absorption chillers could cover up to 83%, 100%, and 35% of the peak cooling requirements in malls 1, 2, and 3, respectively, while providing the highest reductions in CO2 equivalent emissions.
Determination of the heat transfer coefficient by convection, according to shape of the baffles (solar air collector)
Authors: Aouissi Zouhair , Chabane Foued , Teguia Mohamed-Salah , Bensahal Djamel , Moummi Noureddine , Brima Abdelhafid
Published: November 2022

This experimental study and mathematical modelling aim to improve the heat transfer by convection in different cases of transversal baffles inside a duct of a solar air collector. The study enabled us to formulate a mathematical equation of the heat transfer coefficient as a function of pressure drop and the mass flow rates. This mathematical model gave results that are close to the actual results in different inclination angles of the baffles (45°, 90°, 135°, and mixed between 135°and 45°). Through these results, it is found that the best heat transfer coefficient by convection was in the mode where = 90° and in the mixed mode. It was also noticed that the pressure drop in the mixed mode was smaller. With respect to the thermo-hydraulic performance factor (THPF), the case =45° was retained as the best case.
Response surface methodology (RSM) for biodiesel production from waste cooking oil: Study of fatty acid methyl ester (FAME) yield
Authors: Hidouri Nejib , Mouftahi Mawaheb
Published: November 2022

The paper aims to improve biodiesel production from used cooking oils using response surface methodology (RSM). The influence of important factors on biodiesel yield has been investigated by employing a 5-level-3-factor central composite design (CCD). The findings revealed that these factors have considerable impacts on the yield. Besides, fixing temperature value had no detrimental influence on the effectiveness of having adequate mathematical model and obtaining good results. According to the analysis of variance (ANOVA), the molar ratio was found to be the most significant factor. Besides, a second-order models (R2=0.88) were obtained to anticipate the yield as a function of these variables. It is also found that the following ranges of the studied factors can be used to obtain an optimal biodiesel yield: [6.66:1, 8.72:1], [41.62 min, 78.90 min], and [0.91 wt %, 1.79 wt %] for molar ratio, reaction time, and catalyst amount, respectively.
Experimental Comparative Study to Achieve the Maximum Power Point Tracking of a PV System
Authors: Merizgui Tahar , Bouchiba Oumelkheir , Gaoui Bachir , Birane Mouhoub
Published: November 2022

This paper presents a comparison study in different techniques of maximum power point tracking (MPPT), which have been experimented and validated by simulation in the proposed PV system. The main aim of each MPPT technique is to enhance and optimize the output of photovoltaic (PV) array in dynamic weather conditions through an examination algorithm. Nevertheless, an optimized MPPT technique is described in many sides like achievement, software, precision, convergence velocity, and hardware naturalness. The gained experimental results for the MPPT techniques are compared using the Perturbation and Observation (P&O), Incremental Conductance (IncCond), Short Circuit Current (SCC), Open Circuit Voltage (OCV), and Constant Voltage (CV) at weather conditions variations. These methods were analyzed and their performance was estimated through using the Matlab/Simulink under different types of atmospheric conditions. These results show that the IncCond technique gives larger efficiency, at rapidly changing conditions than the other techniques.
Covid-19 in Asia: Governance And The Politics of the Pandemic
Authors: Harriss John , Luong Hy V.
Published: November 2022

In this introduction to studies of the politics of the COVID-19 pandemic in four Asian states—India, Pakistan, Vietnam, and South Korea—we first discuss the difficulties in evaluating the performances of different countries, given the varying reliability of data and the
different possible criteria that may be applied. In our studies we aim rather to illuminate the process of different state responses, and we go on to summarize evidence on different patterns of response across Asia, situating the four country studies in a comparative context. We then review
arguments in the literature about the determinants of different responses, before presenting our framework for the analysis of the politics that underlie these differences. Political leadership has undoubtedly exercised a powerful influence, but in the structural context of the relationships
of state and citizens. We argue that understanding of these relationships is advanced by an analytical framework that draws on state-in-society approaches developed in the work of Joel Migdal, Michael Mann, and Peter Evans.
Why Was the Pandemic Poorly Managed by the Government of India? A State-in-Society Approach
Authors: Harriss John
Published: November 2022

Administrative "success" or "failure" during the pandemic are hard to assess given uncertainties both of criteria and of data. But there can be no doubt about the mishandling of the pandemic at crucial junctures by the Indian government, or about the culpability of prime minister Narendra
Modi himself. He has this in common with other "strongmen" of contemporary world politics, but Modi was unusually successful in turning the events of the pandemic to reinforce his dominance. The immediate political factors that influenced the Indian response had to do with political leadership
and with the "decisionism" that characterised Modi's actions, but in the context of the pursuit of the goals of Hindu nationalism. This article explains the responses of the Indian government drawing on a framework based on the comparative analysis of Baum and her co-authors. It shows how
the events of the pandemic reflect on India's politics and on the character of the Indian state, using a state-in-society approach suggested by the interlocking arguments of Migdal, Mann and Evans. This highlights and explains the very different responses of the major states of the country.