A Re-evaluation of Stratigraphic and Ceramic Evidence from the Bronze and Iron Age site of al-Ṣināʿiyyah at Tayma in Saudi Arabia

This work investigated the ceramics from Ṣināʿiyyah site in Tayma Area. In particular, this study aimed to determine their types, source and chronology. Also, it aimed to find out their distribution within and outside Tayma Area, in order to increase our knowledge of the history of Tayma and its contacts. Hausleiter (2014) has classified Tayma ceramics into a number of groups, of which four of groups are attested in Ṣināʿiyyah assemblage. The features and the suggested dates for these ceramics were reviewed below. Moreover, several excavations have been conducted at Ṣināʿiyyah, and a large number of ceramics were derived from these excavations. However, the ceramics in the published reports are very few, and very important information related to these ceramics is not avialable. Therefore, new excavations in Ṣināʿiyyah were expected to provide significant results regarding the sequences and the dating of these ceramics. For these reasons, as the main part of the current study, two new excavations were conducted in Ṣināʿiyyah site. The ceramics derived from these excavations were divided into six groups based on their physical attributes. These groups were made up of three types of fabric which, according to previous petrographic studies, are related to the geology of Tayma, and may therefore have been made there. Ceramics parallel to the Ṣināʿiyyah groups were also attested in several sites in Tayma, north-west of Arabia and southern Levant. Based on integrating the stratigraphic evidence and C14 dates from our excavations at Ṣināʿiyyah, together with the evidence from the other sites where these groups were found, the six groups from Ṣināʿiyyah were dated (in general) between the early 2 nd millennium BC to the 10 th -5 th century BC. According to the suggested dating and distribution for each group of ceramics, the contact between Tayma and Qurayyah is suggested to have started from the early 2 nd millennium BC and endured more than ten centuries. Whereas, there is evidence which indicates that Tayma was in direct contacts with south Levant and Egypt during the Early Iron Ag

Development of Web-Based Customers Service System in Hyperpanda Mall in Saudi Arabia

The main objective in this study is to develop a web-based system for HyperPanda Mall in Riyadh-Saudi Arabia. HyperPanda Mall offer a huge variety of goods and it is not easy for customers to always find the best offer that fulfill their needs, otherwise, it would cost them long time to search and more efforts. Therefore, this study focused to serve the customers by providing a customer service web-based to guide customers for shopping and purchasing items before going to the stores places, and they have the ability to know the latest products and promotions of the companies and help them to find suitable sales stores and offering best choices available. The system can access the database designed for the mall since this system has search options to find what customers are looking for. Moreover, it helps the companies' vendors who are looking to promote their services and products for their customers and raise their profits locally and internationally, and reach out their customers as much as possible and deliver the best satisfaction of services to their customers wherever they are. A questionnaire based on the Technology Acceptance Model technique has been adopted to ensure of the prototype level in terms of usefulness, satisfaction and easiness of use

Optimization of Fuzzy Logic Controller for Supervisory Power System Stabilizers

This paper presents a powerful supervisory power system stabilizer (PSS) using an adaptive fuzzy logic controller driven by an adaptive fuzzy set (AFS). The system under study consists of two synchronous generators, each fitted with a PSS, which are connected via double transmission lines. Different types of PSS-controller techniques are considered. The proposed genetic adaptive fuzzy logic controller (GAFLC)-PSS, using 25 rules, is compared with a static fuzzy logic controller (SFLC) driven by a fixed fuzzy set (FFS) which has 49 rules. Both fuzzy logic controller (FLC) algorithms utilize the speed error and its rate of change as an input vector. The adaptive FLC algorithm uses a genetic algorithmto tune the parameters of the fuzzy set of each PSS. The FLC’s are simulated and tested when the system is subjected to different disturbances under a wide range of operating points. The proposed GAFLC using AFS reduced the computational time of the FLC, where the number of rules is reduced from 49 to 25 rules. In addition, the proposed adaptive FLC driven by a genetic algorithm also reduced the complexity of the fuzzy model, while achieving a good dynamic response of the system under study

Optimization of Fuzzy Logic Controller for Supervisory Power System Stabilizers

This paper presents a powerful supervisory power system stabilizer (PSS) using an adaptive fuzzy logic controller driven by an adaptive fuzzy set (AFS). The system under study consists of two synchronous generators, each fitted with a PSS, which are connected via double transmission lines. Different types of PSS-controller techniques are considered. The proposed genetic adaptive fuzzy logic controller (GAFLC)-PSS, using 25 rules, is compared with a static fuzzy logic controller (SFLC) driven by a fixed fuzzy set (FFS) which has 49 rules. Both fuzzy logic controller (FLC) algorithms utilize the speed error and its rate of change as an input vector. The adaptive FLC algorithm uses a genetic algorithmto tune the parameters of the fuzzy set of each PSS. The FLC’s are simulated and tested when the system is subjected to different disturbances under a wide range of operating points. The proposed GAFLC using AFS reduced the computational time of the FLC, where the number of rules is reduced from 49 to 25 rules. In addition, the proposed adaptive FLC driven by a genetic algorithm also reduced the complexity of the fuzzy model, while achieving a good dynamic response of the system under study

The recent non-marine ostracods of tunisia: An updated checklist with remarks on their regional distribution patterns and ecological preferences

Different lines of investigation have recently contributed to increasing the available knowledge about the invertebrates inhabiting inland waters of north Africa, but a comprehensive synopsis on Tunisian Ostracoda is missing to date. An updated checklist of Recent non-marine ostracods from Tunisia and data on their distribution is thus offered here, representing the most extensive survey on this crustacean group ever carried out in inland waters throughout the country. One-hundred-five sites covering various climate zones, from Mediterranean to desert areas, were sampled between 2002 and 2012. Most of the considered water bodies were temporary or ephemeral habitats, but a few permanent sites were sampled as well. Overall, 18 genera and 32 taxa of putative species rank were collected in the frame of this survey, among which nine species and five genera were new to Tunisian fauna. As a result of this study and based on pre-vious investigations, nine families (Candonidae, Cyprididae, Cytherideidae, Darwinulidae, Ilyocyprididae, Leptocytheridae, Limno-cytheridae, Loxoconchidae, Paradoxostomatidae), 29 genera and at least 45 species of non-marine ostracods are currently known for Tunisia, which thus prove to host the most diverse ostracod fauna among north African countries. The number of species occurring in a single sample varied from 1 to 4. The Eucypris virens complex was the most widespread taxon (58 records), followed by Heterocypris barbara (30 records), Heterocypris incongruens (22 records), and Sarscypridopsis aculeata (16 records). For some ostracod species, clear distributional gradients associated with different climatic conditions were observed. The affinities with adjacent Maghrebian os-tracod faunas are discussed. This study confirms the crucial role played by marginal aquatic habitats for the conservation of biodiversity, in particular in arid and semi-arid regions

Synthesis, Characterization and Antibacterial Activity of Some New 5,5'-diphenyl-4,4',5,5'-tetrahydro-1H,1'H-3,3'-bipyrazole Derivatives

An efficient and practical synthesis of five compounds of pyrazoline derivatives structures was achieved through cyclization of hydrazine hydrate with 1,6-diphenylhexa-1,5-diene-3,4-dione using glacial acetic acid as catalyst under thermal conditions. These compounds have been characterized by FT-IR, elemental analysis (C.H.N.) and 1H NMR spectroscopy. Keywords:pyrazoline, chalcone, heterocycli

Systemic sclerosis in a patient with pityriasis rubra pilaris

Pityriasis rubra pilaris (PRP) is a rare, chronic erythematous squamous disorder of unknown etiology. It has been found in association with several autoimmune diseases, including thyroiditis, myositis, myasthenia gravis and vitiligo. Herein we report a case of systemic sclerosis in a patient with classic adult pityriasis rubra pilaris. A 38 year old woman with classic adult type 1 pityriasis rubra pilaris (PRP) developed progressive skin thickening of the trunk, face, upper and lower extremities after 2 years of PRP treatment with topical emollients and steroids. Clinical examination and immunological findings were consistent with SSc. Co-existence of these two rare conditions is documented for the first time

COMPARING CARDIAC REHABILITATION GUIDELINES

Objectives: Comparing Cardiac Rehabilitation Guidelines. Method: guidelines were searched alone and with combination with different nations in English language. To review information about the exercises modes, exercise intensity, testing, and monitoring of patients. Results: the United States, Canadian, United Kingdome, and European guidelines all have common components and have differences in the exercises modes and intensity. The United States, Canada, and European guideline suggest aerobic training should progressing from moderate to vigorous intensity through the program, these guidelines also suggest resistance training combined with the aerobic training to improve quality of life. The United Kingdome recommends lower intensity program and less ECG monitoring. Although the other guidelines recommend ECG exercises stress test for functional capacity assessment. Conclusion: guideline for the Mediterranean region should be assembled and after reviewing these guidelines, it is recommended to use ECG monitoring for functional assessment. Managing the risk factors is recommended in all the guidelines. Aerobic endurance training is recommended to advance from moderate to high intensity exercises combined with resistance training. These characteristics are safe for the patients and also showed improvements in patient’s health and quality of life.  Article visualizations