H. Basma, W. Abdeen, A. El-Tahan, E. El-Maghraby, A. Khalaf
SmBa2Cu3O7-δ /(ZnFe2O4)x superconducting composites with 0.00 ≤ x ≤ 0.20 wt% were prepared by the usual solid-state reaction method. The prepared samples were investigated using X-ray powder diffraction (XRD) at room temperature and electron paramagnetic resonance (EPR) measurements in the temperature range (100-295 K). It is found that EPR spectra are dominated by an anisotropic Cu2+ EPR pattern. Moreover, the EPR spectral intensity increases as the temperature decrease from room temperature down to 100 K. The number of spins (N) participating in EPR resonance, the activation energy (Ea), the paramagnetic susceptibility (c) and the effective magnetic moment (μeff) are calculated as a function of both nanosized ZnFe2O4 addition and temperature. The results are interpreted in terms of localized Cu2+ ions from non-superconducting impurity phases and confirmed by magnetization-field (M-H) hysteresis measurements.
{"title":"Studies of SmBa2Cu3O7-δ / ZnFe2O4 Superconducting Composites","authors":"H. Basma, W. Abdeen, A. El-Tahan, E. El-Maghraby, A. Khalaf","doi":"10.54729/2959-331x.1024","DOIUrl":"https://doi.org/10.54729/2959-331x.1024","url":null,"abstract":"SmBa2Cu3O7-δ /(ZnFe2O4)x superconducting composites with 0.00 ≤ x ≤ 0.20 wt% were prepared by the usual solid-state reaction method. The prepared samples were investigated using X-ray powder diffraction (XRD) at room temperature and electron paramagnetic resonance (EPR) measurements in the temperature range (100-295 K). It is found that EPR spectra are dominated by an anisotropic Cu2+ EPR pattern. Moreover, the EPR spectral intensity increases as the temperature decrease from room temperature down to 100 K. The number of spins (N) participating in EPR resonance, the activation energy (Ea), the paramagnetic susceptibility (c) and the effective magnetic moment (μeff) are calculated as a function of both nanosized ZnFe2O4 addition and temperature. The results are interpreted in terms of localized Cu2+ ions from non-superconducting impurity phases and confirmed by magnetization-field (M-H) hysteresis measurements.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130612086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Khatib, Ali Jahami, O. Baalbaki, A. Elkordi, A. Bakri, Roba Alaina
{"title":"PERFORMANCE OF CONCRETE CONTAINING WASTE PLASTIC STRAW FIBERS","authors":"J. Khatib, Ali Jahami, O. Baalbaki, A. Elkordi, A. Bakri, Roba Alaina","doi":"10.54729/2959-331x.1019","DOIUrl":"https://doi.org/10.54729/2959-331x.1019","url":null,"abstract":"","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125141082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"EFFECT OF PARTIAL REPLACEMENT OF SAND BY MSWI-BA ON THE PROPERTIES OF MORTAR","authors":"H. Ghanem, J. Khatib, A. Elkordi","doi":"10.54729/2959-331x.1018","DOIUrl":"https://doi.org/10.54729/2959-331x.1018","url":null,"abstract":"","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114831596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Masoud, R. H. Mohamed, H. Kamel, Najat O. M. El-Ziani
{"title":"SOLVENT EFFECTS ON THE ELECTRONIC ABSORPTION SPECTRA OF SOME ANALYTICAL INDICATORS","authors":"M. Masoud, R. H. Mohamed, H. Kamel, Najat O. M. El-Ziani","doi":"10.54729/2959-331x.1020","DOIUrl":"https://doi.org/10.54729/2959-331x.1020","url":null,"abstract":"","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122397762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The Emergency Medical Service (EMS) plays a vital role in any community. The accessibility, distribution, and utilization of the emergency health care services have a great impact on the effectiveness and the efficiency of the EMS. In this study, an algorithm has been devised to optimize choosing the appropriate station location, allocating the right number of emergency vehicles to a station, and directing the critical and non-critical patients to the most suitable hospitals. XPRESS-MP solver engine was used in this study to derive a deterministic mathematical model using mixed integer linear programming. This model is customized for Beirut city. The aim of the study is to design a system that ensures that an emergency vehicle should be available at the time of the incident and the travelling time required must be less than the standard travelling time. The outcome of the study optimizes the number and the location of the EMS stations as well as the number of emergency vehicles allocated to each station. In addition, it optimizes addressing and readdressing the patients to the most suitable hospitals taking into consideration deterioration of the patients’ health conditions while being driven to the hospital. Furthermore, the travel time presented in this study shows the shortest travel distance between any two zones.
{"title":"EMERGENCY VEHICLES ALLOCATION MODEL FOR URBAN CITY","authors":"Ramzi Fayad, Hadi Abou Chakra","doi":"10.54729/2959-331x.1015","DOIUrl":"https://doi.org/10.54729/2959-331x.1015","url":null,"abstract":"Abstract The Emergency Medical Service (EMS) plays a vital role in any community. The accessibility, distribution, and utilization of the emergency health care services have a great impact on the effectiveness and the efficiency of the EMS. In this study, an algorithm has been devised to optimize choosing the appropriate station location, allocating the right number of emergency vehicles to a station, and directing the critical and non-critical patients to the most suitable hospitals. XPRESS-MP solver engine was used in this study to derive a deterministic mathematical model using mixed integer linear programming. This model is customized for Beirut city. The aim of the study is to design a system that ensures that an emergency vehicle should be available at the time of the incident and the travelling time required must be less than the standard travelling time. The outcome of the study optimizes the number and the location of the EMS stations as well as the number of emergency vehicles allocated to each station. In addition, it optimizes addressing and readdressing the patients to the most suitable hospitals taking into consideration deterioration of the patients’ health conditions while being driven to the hospital. Furthermore, the travel time presented in this study shows the shortest travel distance between any two zones.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130770891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In today’s world of fast developing technologies, semi-autonomous vehicles are becoming a common sight and increasing in numbers. Some feature autopilot systems that drive the vehicle without any intervention from the driver in certain situations or warn the driver of dangers ahead. A fully autonomous vehicle is yet to come due to old fashioned road infrastructures that would convey challenging scenarios for it. From speed bumps and traffic lights to road lanes and warning signs, current autopilot systems will have to cope with all. A system that ensures safe crossing of speed bumps when in autopilot mode is discussed in this paper. Crossing a speed bump at high speeds may result in loss of control, suspension failure, onboard cargo damage, and/or compromised passenger comfort. The proposed system can detect a speed bump from a distance, calculate the suitable crossing speed by studying vertical acceleration disturbances, and apply the brakes automatically using a Fuzzy Logic Controller (FLC) to reduce the speed before the car reaches the speed bump.
{"title":"FUZZY LOGIC VELOCITY OPTIMIZATION OF AUTONOMOUS VEHICLES BASED ON ROAD BUMP GEOMETRY","authors":"Yassine Zein, M. Darwiche","doi":"10.54729/2959-331x.1016","DOIUrl":"https://doi.org/10.54729/2959-331x.1016","url":null,"abstract":"In today’s world of fast developing technologies, semi-autonomous vehicles are becoming a common sight and increasing in numbers. Some feature autopilot systems that drive the vehicle without any intervention from the driver in certain situations or warn the driver of dangers ahead. A fully autonomous vehicle is yet to come due to old fashioned road infrastructures that would convey challenging scenarios for it. From speed bumps and traffic lights to road lanes and warning signs, current autopilot systems will have to cope with all. A system that ensures safe crossing of speed bumps when in autopilot mode is discussed in this paper. Crossing a speed bump at high speeds may result in loss of control, suspension failure, onboard cargo damage, and/or compromised passenger comfort. The proposed system can detect a speed bump from a distance, calculate the suitable crossing speed by studying vertical acceleration disturbances, and apply the brakes automatically using a Fuzzy Logic Controller (FLC) to reduce the speed before the car reaches the speed bump.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122472036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nowadays, the stability of population growth is becoming one of the common global social and health problems that could be solved via contraception. Current research in the field of male contraceptives is focusing on the use of oral herbs. Eriobotrya japonica (Loquat) is a medicinal plant that has been commonly valued for its anti-inflammatory, antioxidant, antidiabetic, hypocholesteremic, and antitumor properties. The present study aimed to investigate the effects of the oral administration of loquat aqueous leaves extract on the fertility of male Balb/c mice. For this aim, six-eight-weeks old male Balb/c mice (~25g) were orally administered (100 mg/Kg/day) loquat leaves extract for 10 and 30 days. The effects of this extract on semen parameters, seminiferous tubules architecture, levels of male sex hormones, glucose and cholesterol, and mRNA levels of key enzymes involved in steroidogenesis were determined. These parameters were also measured following 20 days post-treatment withdrawal. Our results showed that loquat extract administered for 10 and 30 days exerted antifertility effects including a significant decrease in sperm motility, viability and count, and in testosterone and progesterone levels concomitant with serious arrest in spermatogenesis. The levels of prolactin significantly increased with loquat treatment for 10 and 30 days. This extract inactivated the steroidogenesis pathway. All these alterations were significantly restored to normal in all the treated animals after 20 days of treatment withdrawal. No changes in the levels of glucose and cholesterol were noticed. Loquat extract is an effective and potential reversible male contraceptive herb.
{"title":"POTENTIAL MALE CONTRACEPTIVE EFFECT OF ERIOBOTRYA JAPONICA LEAVES EXTRACT","authors":"A. Moubarak, Manal El Joumaa, J. Borjac","doi":"10.54729/2959-331x.1023","DOIUrl":"https://doi.org/10.54729/2959-331x.1023","url":null,"abstract":"Nowadays, the stability of population growth is becoming one of the common global social and health problems that could be solved via contraception. Current research in the field of male contraceptives is focusing on the use of oral herbs. Eriobotrya japonica (Loquat) is a medicinal plant that has been commonly valued for its anti-inflammatory, antioxidant, antidiabetic, hypocholesteremic, and antitumor properties. The present study aimed to investigate the effects of the oral administration of loquat aqueous leaves extract on the fertility of male Balb/c mice. For this aim, six-eight-weeks old male Balb/c mice (~25g) were orally administered (100 mg/Kg/day) loquat leaves extract for 10 and 30 days. The effects of this extract on semen parameters, seminiferous tubules architecture, levels of male sex hormones, glucose and cholesterol, and mRNA levels of key enzymes involved in steroidogenesis were determined. These parameters were also measured following 20 days post-treatment withdrawal. Our results showed that loquat extract administered for 10 and 30 days exerted antifertility effects including a significant decrease in sperm motility, viability and count, and in testosterone and progesterone levels concomitant with serious arrest in spermatogenesis. The levels of prolactin significantly increased with loquat treatment for 10 and 30 days. This extract inactivated the steroidogenesis pathway. All these alterations were significantly restored to normal in all the treated animals after 20 days of treatment withdrawal. No changes in the levels of glucose and cholesterol were noticed. Loquat extract is an effective and potential reversible male contraceptive herb.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129443284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
These days, the fundamental target of all organizations is to accomplish a reasonable gainfulness. Organizations are looking to decide the elements, which has direct impact on their benefit and attempt to investigate them so as to pick up favorable circumstances on their rivals. With this solid aggressive market, holding customers turns into the fundamental objective of telecom mobile service providers opposed to drawing in new customers, since the expense of holding a customer is viewed as low contrasted with the expense of pulling in another customer as referenced before by numerous researchers. Thus, Customer Churn Analytics is one of the significant elements that organizations should concentrate on to help their goal of accomplishing a reasonable benefit. In Telecommunication area, the business aims to serve customers, and analyzing customer churn will give the executives a thought regarding the probability of a customer to leave the organization. The primary goal of this paper is to highlight the main factors that affect customer churn and then analyze them by using the Binary Logistic Regression Model. A case study in Kuwait telecommunication section was taken as an application for such algorithm. A non-probability sampling technique is used (Snowball) to select a sample of 120 customer and analyze them by using the statistical software SPSS and MINITAB, results shows that the Customers’ Gender, Marital Status, Monthly Bill as well as the Service Quality have significant effects on Customer Churn.
{"title":"CUSTOMER CHURN ANALYSIS USING BINARY LOGISTIC REGRESSION MODEL","authors":"Mohammad Abiad, Sorin Ionescu","doi":"10.54729/2959-331x.1021","DOIUrl":"https://doi.org/10.54729/2959-331x.1021","url":null,"abstract":"These days, the fundamental target of all organizations is to accomplish a reasonable gainfulness. Organizations are looking to decide the elements, which has direct impact on their benefit and attempt to investigate them so as to pick up favorable circumstances on their rivals. With this solid aggressive market, holding customers turns into the fundamental objective of telecom mobile service providers opposed to drawing in new customers, since the expense of holding a customer is viewed as low contrasted with the expense of pulling in another customer as referenced before by numerous researchers. Thus, Customer Churn Analytics is one of the significant elements that organizations should concentrate on to help their goal of accomplishing a reasonable benefit. In Telecommunication area, the business aims to serve customers, and analyzing customer churn will give the executives a thought regarding the probability of a customer to leave the organization. The primary goal of this paper is to highlight the main factors that affect customer churn and then analyze them by using the Binary Logistic Regression Model. A case study in Kuwait telecommunication section was taken as an application for such algorithm. A non-probability sampling technique is used (Snowball) to select a sample of 120 customer and analyze them by using the statistical software SPSS and MINITAB, results shows that the Customers’ Gender, Marital Status, Monthly Bill as well as the Service Quality have significant effects on Customer Churn.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"732 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116069906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Khatib, Ali Jahami, O. Baalbaki, A. Elkordi, H. Abdelgader
{"title":"BEHAVIOR OF REINFORCED CONCRETE BEAMS CONTAINING LIGHTWEIGHT AGGREGATE IN THE TENSILE ZONE","authors":"J. Khatib, Ali Jahami, O. Baalbaki, A. Elkordi, H. Abdelgader","doi":"10.54729/2959-331x.1017","DOIUrl":"https://doi.org/10.54729/2959-331x.1017","url":null,"abstract":"","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133063492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Knowledge sharing among faculty members may enhance the quality of teaching and research activities. Despite the fact that a number of research has been conducted, to the best of our knowledge, this is the first work that focus on multinational academicians. The aim of this empirical study is to investigate ways and factors which contribute to knowledge sharing in the context of multinational academicians at universities. We performed this study at the Information Technology faculty at one of universities in Saudi Arabia, as a case study. The faculty employed academicians from 10 different countries including Malaysia, Jordanian, Egypt, Saudi Arabia, Tunisia, Pakistan, Yamen, Algeria and Canada. We used qualitative and quantitative approaches. The sample size of this study is N=40, and n=38 responded to the survey. Research results indicate 100% and 95% of academicians preferred to use phone calls and social media respectively, for knowledge sharing. Between 92% and 95% of the respondents have approved that elements of self-esteem which include satisfaction and feeling proud of oneself, respectively, are factors for knowledge sharing. Despite the fact that there is a strong relationship between trust and friendship, there is a need to substantiate that assumption because only 42% of the respondents shared based on a friendship relationship. Respondents also recognized appreciation and monetary rewards as motivation factors. The language used, lack of informal interactions, voluntary efforts are among barriers of knowledge sharing in this context. Findings of this study can be used a guideline for setting up a knowledge sharing mechanism by multinational higher education institutes.
{"title":"EMPIRICAL STUDY OF KNOWLEDGE SHARING AMONG MULTINATIONAL ACADEMICIANS","authors":"S. Jusoh, H. Alfawareh","doi":"10.54729/2959-331x.1010","DOIUrl":"https://doi.org/10.54729/2959-331x.1010","url":null,"abstract":"Knowledge sharing among faculty members may enhance the quality of teaching and research activities. Despite the fact that a number of research has been conducted, to the best of our knowledge, this is the first work that focus on multinational academicians. The aim of this empirical study is to investigate ways and factors which contribute to knowledge sharing in the context of multinational academicians at universities. We performed this study at the Information Technology faculty at one of universities in Saudi Arabia, as a case study. The faculty employed academicians from 10 different countries including Malaysia, Jordanian, Egypt, Saudi Arabia, Tunisia, Pakistan, Yamen, Algeria and Canada. We used qualitative and quantitative approaches. The sample size of this study is N=40, and n=38 responded to the survey. Research results indicate 100% and 95% of academicians preferred to use phone calls and social media respectively, for knowledge sharing. Between 92% and 95% of the respondents have approved that elements of self-esteem which include satisfaction and feeling proud of oneself, respectively, are factors for knowledge sharing. Despite the fact that there is a strong relationship between trust and friendship, there is a need to substantiate that assumption because only 42% of the respondents shared based on a friendship relationship. Respondents also recognized appreciation and monetary rewards as motivation factors. The language used, lack of informal interactions, voluntary efforts are among barriers of knowledge sharing in this context. Findings of this study can be used a guideline for setting up a knowledge sharing mechanism by multinational higher education institutes.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128252535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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