Journals of Kasdi Merbah Ouargla University
Not a member yet
2693 research outputs found
Sort by
The Impact of Psychostimulants on Executive Functions: Cognitive Flexibility as a Model
Get PDFThe current study aims to investigate the impact of drugs (psychostimulants) on executive functions among young individuals. We focused on both cognitive flexibility and cognitive control as they are deemed crucial, by presenting the following hypotheses:
There are statistically significant differences between users and non-users in the time taken to complete subtest A of the Trail Making Test (TMT).
There are statistically significant differences between users and non-users in the number of self-corrected errors in subtest B of the TMT.
There are statistically significant differences between users and non-users in the number of uncorrected errors in subtest B of the TMT.
To test these hypotheses, a correlational descriptive approach was employed, utilizing the Trail Making Test (TMT) after administering it to a sample of 60 young individuals, equally divided between users and non-users.
Upon data analysis, the results of the hypotheses were as follows:
There are statistically significant differences in the time taken to complete subtest A in favor of users.
There are statistically significant differences in the number of self-corrected errors (cognitive flexibility) in subtest B in favor of non-users.
There are statistically significant differences in the number of uncorrected errors (cognitive control) in subtest B in favor of non-users.
These results were discussed and interpreted within the theoretical framework and previous studies
DEMOGRAPHIC STRUCTURE AND SPATIAL DISTRIBUTION OF THE Pinus halepensis MILL POPULATIONS OF THE BENI OUDJANA DOMANIAL FOREST (KHENCHLA)
Get PDFThe establishment and interpretation of diameter and height structures is essential for forestmanagement decision-making. This study aims to describe the diameter structure and spatial distribution ofPinus halpensis populations in the Beni Oudjana (Khenchela) forest. Knowledge of these parameters is anessential step in their sustainable management. The diameter at 1.30 m from the ground, the total height of P.halpensis individuals were measured on 6 plots according to an altitudinal gradient. The diameter and heightstructures were established according to the diameter or height classes and adjusted to the theoretical Weibulldistribution. The density of the species increases according to this gradient from 4060 feet/hectare in plot P3 (atan altitude of 1472m) to 340 feet/hectare in plot P2 (1106m altitude). The stand of plot 4 is characterized by thelowest average values for diameter (5.784±7.03cm) height (3.19±2.56m), basal area (0.00±0.02m2/ha), totalvolume (0.03±0.10m3/ha) and relative density of 15%. Analysis of diameter and height structures shows anincrease in the frequency of young individuals. These results contribute to the improvement of knowledge oncurrent status indicators of natural P. halpensis stands that can be used as a basis for the management of the BeniOudjana forestL’établissement et l’interprétation des structures en diamètre et hauteur sont indispensables pour laprise de décisions en aménagement forestier. Cette étude vise à décrire la structure en diamètre et la distributionspatiale des populations de Pinus halpensis dans la forêt domaniale de Beni Oudjana (Khenchela). Laconnaissance de ces paramètres constitue une étape indispensable à leur gestion durable. Le diamètre à 1,30 mdu sol, la hauteur totale des individus de P. halpensis ont été mesurés sur 6 parcelles selon un gradientaltitudinal. Les structures en diamètre et hauteur ont été établies suivant les classes de diamètre ou hauteur etajustées à la distribution théorique de Weibull. La densité de l’espèce augmente selon ce gradient de 4060pieds/hectare dans la placette P3 (à une altitude de 1472m) à 340 pieds/hectare dans la placette P2 (1106md’altitude). Le peuplement de la parcelle 4 se caractérise par les plus faibles valeurs de diamètre (5,784±7,03cm)de hauteur (3,19±2,56m), de surface terrière (0,006±0,02m2/ha), de volume total (0,03±0,10m3/ha) et de densitérelative de 15%. L’analyse des structures en diamètre et en hauteur révèle une augmentation de la fréquence desindividus jeunes. Ces résultats contribuent à l’amélioration de la connaissance sur les indicateurs d’état actueldes peuplements de Pinus halpensis naturels pouvant servir de base dans la gestion de la forêt de Beni Oudjan
STUDY OF THE BEHAVIOUR OF COMMON WHEAT (AE. GENICULATA) SUBJECTED TO WATER STRESS BY THE ANALYSIS OF SOME MORPHOPHYSIOLOGICAL AND BIOCHEMICAL PARAMETERS
Get PDFDrought in Algeria and other Maghreb countries is widely recognized as the primarylimiting factor in agricultural production and is a permanent constraint. The Figurant against thisclimatic factor must be considered through a multidisciplinary approach 1]. The study is carried outon eight genotypes of the species Ae. geniculata collected in several ecogeographic regions acrossnorthern Algeria. The study of the response to water stress in these eight genotypes and the controlreveals the existence of a high variability for most of the parameters measured (morphological,physiological and biochemical). The results of morphological parameters show a marked decrease inplant height and leaf area in most genotypes with an increase in leaf specific weight of aerial and rootparts. The results of physiological parameters show variability between genotypes and water situation.In most genotypes, there was a decrease in total chlorophyll levels and relative levels and an increasein the rate of water loss. The accumulation of osmoticums during a declaration of a water deficitremains a drought resistance parameter. Our results show that the water deficit is accompanied by aclear accumulation of soluble sugars in all genotypes especially G8 and control G9 (Wheat) but with asignificant accumulation of proline in G8. In conclusion we can conclude that the eight genotypesstudied showed the same mechanisms and strategies in response to water stress but with differentdegrees. The G8 genotype shows good resistance to water stress compared to the other genotypesstudied.La sécheresse en Algérie et dans d’autres pays du Maghreb est largement reconnue commele premier facteur limitant de la production agricole et constitue une contrainte permanente. La luttecontre ce facteur climatique doit être envisagée à travers une approche multidisciplinaire 1]. Notreétude est réalisée sur huit génotypes de l’espèce Ae. geniculata collectés dans plusieurs régions écogéographiques à travers le nord Algérien. L‘étude de la réponse au stress hydrique chez ces huitgénotypes et le témoin révèle l’existence d’une grande variabilité pour la plupart des paramètresmesurés (morphologiques, physiologiques et biochimiques). Les résultats des paramètresmorphologiques montrent une diminution marquée de la hauteur de la plante et de la surface foliairechez la plupart des génotypes avec une augmentation du poids spécifique foliaire des parties aérienneset racinaires. Les résultats des paramètres physiologiques montrent des variabilités entre génotypes etla situation hydrique. Chez la plupart des génotypes on a noté une diminution du taux de lachlorophylle totale et de la teneur relative et une augmentation du taux de déperdition en eau.L’accumulation des osmoticums lors d’une déclaration d’un déficit hydrique reste un paramètre derésistance à la sécheresse. Nos résultats montrent que le déficit hydrique s’accompagne d’une netteaccumulation des sucres solubles chez tous les génotypes surtout le G8 et le témoin G9 (Blé) maisavec une accumulation importante de proline chez le G8. En conclusion nous pouvons conclure queles huit génotypes étudiés ont montré les mêmes mécanismes et stratégies en réponse au stresshydrique mais avec des degrés différents. Le génotype G8 montre une bonne résistance au stresshydrique par rapport aux autres génotypes étudiés
ETUDE PARASITOLOGIQUES DES FIENTES DU PIGEON BISET COLUMBA LIVIA GMELIN, 1789 DANS QUELQUES LOCALITES DE LA MITIDJA
Get PDFThis study focuses on endoparasites species infecting the Rock pigeon (Columba livia) captured invarious sites in the Blida region and its adjacent areas during the winter and spring seasons. The analysis of thesamples was conducted using different parasitological techniques, leading to the identification of nine species.Among them, Eimeria sp. was the most prevalent (42%), followed by Ascaridia sp (22.22%) and Tetrameres sp(20%). The other species were less represented. Additionally, two unusual parasites were detected: Strongylus spand Angiostrongylus sp. Furthermore, this study highlights the role of pigeons as potential vectors of pathogenicparasites, particularly due to their droppings contaminating the environment. The proximity of these birds tohuman dwellings could therefore pose a significant risk to public healthCette étude porte sur les espèces d’endoparasites infectant le Pigeon biset (Columba livia) capturédans divers sites de la région de Blida et ses alentours, durant les saisons hivernale et printanière. L'analyse deséchantillons ont été réalisées à l'aide de différentes techniques parasitologiques, permettant l'identification deneuf espèces. Parmi elles, Eimeria sp est la plus prévalente (42 %), suivie par Ascaridia sp (22,22 %) etTetrameres sp (20 %), les autres espèces sont moins représentées. Par ailleurs, deux parasites inhabituels ont étédétectés à savoir Strongylus sp et Angiostrongylus sp. De plus, ce travail, met en évidence le rôle des pigeons entant que vecteurs potentiels de parasites pathogènes, notamment en raison de leurs déjections qui contaminentl’environnement. La proximité de ces oiseaux avec les habitations humaines pourrait ainsi représenter véritablerisque pour la santé publiqu
The reality of Algerian university governance: a case study of the Faculty of Economic Sciences, Commercial Sciences, and Management Sciences at the University of Mascara
Get PDFThis study investigates the present state of university governance within the Faculty of Economic Sciences, Commercial Sciences, and Management Sciences at the University of Mascara. The focus of this research encompasses transparency, accountability, participation, independence, and communication effectiveness. The study employs a descriptive-analytical methodology, utilizing questionnaires to gather primary data. A convenience sampling technique was applied by distributing 43 questionnaires to employees of the aforementioned faculty. A total of 24 completed questionnaires were retrieved and deemed valid for analysis. Employing statistical methods, including non-parametric methods, the study concludes that there is a moderate level of agreement regarding the application of governance principles. Notably, significant differences were observed among employees based on their respective department
The Role of Environmental Accounting in Improving Environmental Performance in Algerian Economic Institutions
Get PDFThis study examines the role of environmental accounting in enhancing the environmental performance of Algerian economic institutions. This study investigates whether financial and managerial environmental accounting, as well as environmental auditing, contribute to improved environmental outcomes. It employs a descriptive analytical approach, utilizing a questionnaire distributed to a sample of board members, accountants, auditors, and employees from selected institutions. Data analysis was conducted using SMART PLS 4 statistical program. The findings indicate that financial environmental accounting and environmental auditing significantly influence environmental performance, whereas managerial environmental accounting does not show a statistically significant impact. This study highlights the importance of integrating environmental considerations into financial decision-making processes and emphasizes the need for transparent reporting of environmental costs. It also underscores the value of environmental auditing in ensuring compliance with environmental regulations. This study contributes to understanding how environmental accounting practices can support sustainable development by reducing negative environmental impacts and improving organizational accountability. This study provides insights into the practical application of environmental accounting tools and their potential to enhance both environmental and economic performance in organization
Impact of the Modernization of Tax Administration on Efficiency of Tax Administration and Tax Compliance of Taxpayers in Algeria
Get PDFThis study aims to determine the impact of the modernization of tax administration on efficiency of tax administration and tax compliance of taxpayers in Algeria, to assess this impact we used statistical data reflecting the activity DGI services, such as tax revenue, overall administrative cost, number of litigation files relating to tax fraud, amount of recoveries after tax audit and number of fraudsters registered in the national fraudsters file, through the evolution of the different statistical data for the period 2012-2018 it has been concluded that the modernization of tax administration has made it possible to improve efficiency of tax administration but efforts remain to be made to improve it further, on the other hand the program of modernization did not improve tax compliance of taxpayers in Algeri
The Role of E-Commerce Ethics in The Protection of E-Consumer
Get PDFThis study aims to clarify the role of e-commerce ethics in the protection of e-consumer, in thisage in which electronic practices have spread widely and it is easy to conclude contracts via the line. On theother hand, the consumer has become susceptible more than ever to fraud, deception and electronic fraud byelectronic vendors on the one hand and Internet hackers on the other, which obliged companies, states,governments and international bodies to protect the e-consumer by enactment of laws and legislations or bythe provision of tools, programs, technical and control methods to protect the privacy and security of the econsumerwhich is the weakest link in this type of deal. However, the-consumer remains at risk of theft anddeception by commercial companies on the line, which exploits the technical gaps also the consumerignorance of the laws to deceive and circumvent him and steal his money. Ethics may limit these illegalpractices and ensure compliance with laws and regulatory frameworks that protect The e-consumer, also itallows compliance with various contract terms and payment, and it increases the level of confidence inelectronic transactions. Laws without ethics can’t perform their role properly. So, ethics remains the mostimportant framework in the protection of e-consumer
The relationship between the perception of ethical leadership and the employees counterproductive behavior at work
Get PDFThe aims of this work try to examine employee attitudes and behavior repercussions sensing on ethical leadership of their direct managers. The studies is focused on a sample of 465 employee segmented on four (4) Algerian firms over tow (02) regions (Mascara & Bejaia). Results give negative influence correlation between the two variable
Studying the ability of institutional characteristics to interpret financial performance using the traditional and modern financial indicators of Algerian cement enterprises Applied Study of the Industrial Estates of Algeria Cement during the Period (2011
Get PDFThis study aims at identifying the ability of institutional characteristics to interpret financialperformance using traditional and modern financial indicators of the most important national industrialinstitutions represented by the (12) cement enterprises of the (GICA) during the period (2011-2016).The empirical results for the impact of institutional characteristics have shown that the characteristics of(R4, R5, R10 and R11) explain 82% of changes in( ROA), While the institutional characteristics of themanagement accounts indicators (R1, R1, R3, R3) explain the 98.6% of the changes in the return onequity (ROE) .As the results of the tests proved, there is no statistically significant impact on institutionalcharacteristics on the recent financial performance indicator