The impact of Djezzy service quality in reaching the Customer’s loyalty Case study of a sample from Djezzy customers –Laghouat-

هدفت هذه الدراسة إلى الكشف عن الأثر الذي تلعبه جودة الخدمة المقدمة من طرف جازي في تحقيق ولاء زبائنها. و قصد تحقيق أهداف هذه الدراسة تم الاعتماد على طريقة الاستقصاء عن طريق الاستبيان، و ذلك بتصميم استبيان و توزيعه على عينة من زبائن جازي بمدينة الأغواط، و قمنا باستخدام برنامج SPSS في تحليل بيانات الاستبيان مستخدمين في ذلك أساليب إحصائية مختلفة لعرض النتائج واختبار الفرضيات. و من أهم النتائج المتوصل إليها نذكر أبرزها كما يلي: يوجد تأثير ذو دلالة إحصائية لجودة الخدمة المقدمة من طرف جازي في ولاء الزبائن؛ هناك فروق ذات دلالة إحصائية لولاء زبائن جازي تعود إلى متغير المستوى التعليمي؛ لا توجد فروق ذات دلالة إحصائية لولاء زبائن جازي تعود إلى متغيرات الجنس، العمر، الحالة العائلية و نمط الاشتراك.The present study aims to unveil the impact of the service quality provided by Djezzy in gaining its customer’s loyalty. In order to reach the objectives of the study we adopted a method of survey through a questionnaire which was structured and distributed to a sample of Djezzy customers in the wilaya of Laghouat. We used SPSS program in the questionnaire data analysis using different statistical methods to show the results and test the hypotheses. Among the most important results obtained: There is a statistically significant effect of the service quality provided by Djezzy on its customers’ loyalty; There are significant differences of Djezzy customers’ loyalty due to the variable of educational level; There are no significant differences of Djezzy customers’ loyalty due to the variables of gender, age, family status, and payment mode

ELECTROCHEMICAL STUDY AND COMPUTATIONAL DETAILS OF COPPER CORROSION INHIBITION BY 1H-BENZOTRIAZOLE IN 3 wt. % NaCl MEDIUM

The effect of 1H-benzotriazole (BTAH) with ppm (part per million) grade concentrations on copper corrosion in aerated 3 wt. % NaCl solution is studied using chemical method (weight loss) and electrochemical methods (Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS)). The present study confirm that the BTAH acts as a mixed-type inhibitor of copper corrosion in 3 wt. % NaCl. The optimum inhibition efficiency is at 30 ppm of BTAH. The surface characterization is performed using Scanning Electron Microscopy (SEM) to confirm the adsorption of the inhibitor molecules after 21 days of immersion time in aerated 3 wt. % NaCl. The results obtained from different techniques used in this research are in very good agreement and revealed that the BTAH is a very good inhibitor of copper corrosion in sodium chloride medium. Computer Simulation techniques confirm that the BTAH molecules adsorbed on the Cu (110) Surface

The Effect of Using Information and Communication Technology on Service Quality: The case of Mobilis Clients

هدفت هذه الدراسة إلى الكشف عن الأثر الذي تلعبه تكنولوجيا المعلومات و الاتصال في جودة الخدمة. و قصد تحقيق أهداف هذه الدراسة تم الاعتماد على طريقة الاستقصاء عن طريق الاستبيان، و ذلك بتصميم استبيان إلكتروني و توزيعه على عينة من عملاء موبيليس، و قمنا باستخدام برنامجي SPSS 26 و Amos 26 في تحليل بيانات الاستبيان مستخدمين في ذلك أساليب إحصائية مختلفة لعرض النتائج واختبار الفرضيات. و من أهم النتائج المتوصل إليها من خلال هذه الدراسة هو أنه يوجد أثر ذو دلالة إحصائية لتكنولوجيا المعلومات و الاتصال  في جودة الخدمة. كما أن هناك أثر ذو دلالة إحصائية لكل عنصر من عناصر تكنولوجيا المعلومات و الاتصال و هي الأفراد و التجهيزات المادية و البرمجيات و الشبكات و قواعد البيانات في جودة الخدمة.The current research aims at unveiling the effect of Communication and Information Technology on service quality. To reach the objectives of the study, the survey method has been adopted through an electronic questionnaire which has been designed and distributed to a sample of Mobilis clients. SPSS 26 and AMOS 26 were used to analyse the collected data using different tools to analyse the results and test the hypotheses. The most significant results obtained from this study portray a statistically significant effect of communication and information technology on service quality. Moreover, there is a statistically significant effect of each element from the information and communication technology’s; namely human resources, equipments, softwares, networks and data bases on service quality. &nbsp

Bipolar picture fuzzy sets and relations with applications

The notions of both the bipolar fuzzy sets and picture fuzzy sets have been studied by many authors, the bipolar picture fuzzy set is the nice combination of these two notions. Basically, the concepts we present in our study are the direct extensions of both the bipolar fuzzy sets and picture fuzzy sets. In this study, we add few more operations and results in the theory of the bipolar picture fuzzy sets. We also initiate the notion of bipolar picture fuzzy relations along with their applications. We present numerous basic operations along with the algebraic sums, bounded sums, algebraic product, bounded difference on bipolar picture fuzzy sets. Different types of distances between two bipolar picture fuzzy sets are also addressed. We provide the application of bipolar picture fuzzy sets towards decision making theory along with its algorithm. Afterward, we introduce different types of bipolar picture fuzzy relations like bipolar picture fuzzy reflexive, symmetric and transitive relations. Subsequently, we introduce the concepts of the bipolar picture fuzzy equivalence relation and partition. We also produce numerous interesting results based on these relations. Finally, we establish the criteria for the detection of covid-19 at the base of bipolar picture fuzzy relations

The history of rainfall data time-resolution in a wide variety of geographical areas

Collected rainfall records by gauges lead to key forcings in most hydrological studies. Depending on sensor type and recording systems, such data are characterized by different time-resolutions (or temporal aggregations), ta. We present an historical analysis of the time-evolution of ta based on a large database of rain gauge networks operative in many study areas. Globally, ta data were collected for 25,423 rain gauge stations across 32 geographic areas, with larger contributions from Australia, USA, Italy and Spain. For very old networks early recordings were manual with coarse time-resolution, typically daily or sometimes monthly. With a few exceptions, mechanical recordings on paper rolls began in the first half of the 20th century, typically with ta of 1 h or 30 min. Digital registrations started only during the last three decades of the 20th century. This short period limits investigations that require long time-series of sub-daily rainfall data, e.g, analyses of the effects of climate change on short-duration (sub-hourly) heavy rainfall. In addition, in the areas with rainfall data characterized for many years by coarse time-resolutions, annual maximum rainfall depths of short duration can be potentially underestimated and their use would produce errors in the results of successive applications. Currently, only 50% of the stations provide useful data at any time-resolution, that practically means ta = 1 min. However, a significant reduction of these issues can be obtained through the information content of the present database. Finally, we suggest an integration of the database by including additional rain gauge networks to enhance its usefulness particularly in a comparative analysis of the effects of climate change on extreme rainfalls of short duration available in different locations

K2Au(IO3)5 and βâ KAu(IO3)4: Polar Materials with Strong SHG Responses Originating from Synergistic Effect of AuO4 and IO3 Units

Two new polar potassium gold iodates, namely, K2Au(IO3)5 (Cmc21) and βâ KAu(IO3)4 (C2), have been synthesized and structurally characterized. Both compounds feature zeroâ dimensional polar [Au(IO3)4]â units composed of an AuO4 squareâ planar unit coordinated by four IO3â ions in a monodentate fashion. In βâ KAu(IO3)4, isolated [Au(IO3)4]â ions are separated by K+ ions, whereas in K2Au(IO3)5, isolated [Au(IO3)4]â ions and nonâ coordinated IO3â units are separated by K+ ions. Both compounds are thermally stable up to 400â °C and exhibit high transmittance in the NIR region (λ=800â 2500â nm) with measured optical band gaps of 2.65â eV for K2Au(IO3)5 and 2.75â eV for βâ KAu(IO3)4. Powder secondâ harmonic generation measurements by using λ=2.05â μm laser radiation indicate that K2Au(IO3)5 and βâ KAu(IO3)4 are both phaseâ matchable materials with strong SHG responses of approximately 1.0 and 1.3 times that of KTiOPO4, respectively. Theoretical calculations based on DFT methods confirm that such strong SHG responses originate from a synergistic effect of the AuO4 and IO3 units.Work together: Two new polar iodates, namely, K2Au(IO3)5 (Cmc21) and βâ KAu(IO3)4 (C2), with strong SHG effects (1.0 and 1.3 times that of KTiOPO4) have been discovered (see figure). Theoretical calculations confirm that such strong secondâ harmonic generation (SHG) responses originate from the synergistic effect of the AuO4 and IO3 units.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137203/1/chem201504117-sup-0001-misc_information.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137203/2/chem201504117.pd

The history of rainfall data time-resolution in a wide variety of geographical areas

Collected rainfall records by gauges lead to key forcings in most hydrological studies. Depending on sensor type and recording systems, such data are characterized by different time-resolutions (or temporal aggregations), ta. We present an historical analysis of the time-evolution of ta based on a large database of rain gauge networks operative in many study areas. Globally, ta data were collected for 25,423 rain gauge stations across 32 geo graphic areas, with larger contributions from Australia, USA, Italy and Spain. For very old networks early re cordings were manual with coarse time-resolution, typically daily or sometimes monthly. With a few exceptions, mechanical recordings on paper rolls began in the first half of the 20th century, typically with ta of 1 h or 30 min. Digital registrations started only during the last three decades of the 20th century. This short period limits investigations that require long time-series of sub-daily rainfall data, e.g, analyses of the effects of climate change on short-duration (sub-hourly) heavy rainfall. In addition, in the areas with rainfall data characterized for many years by coarse time-resolutions, annual maximum rainfall depths of short duration can be potentially underestimated and their use would produce errors in the results of successive applications. Currently, only 50% of the stations provide useful data at any time-resolution, that practically means ta = 1 min. However, a sig nificant reduction of these issues can be obtained through the information content of the present database. Finally, we suggest an integration of the database by including additional rain gauge networks to enhance its usefulness particularly in a comparative analysis of the effects of climate change on extreme rainfalls of short duration available in different locations