The impact of mobile phones applications in the educational process among students and faculty staff members at the College of Education- Female section, Jazan University

A systematic random sample of (110) college students (female) aged (18-22) year old, and (15) faculty staff members at the College of Education-female section, Jazan University, was chosen. The study conducted in the academic year (2018). Questionnaire and interviews were used for collecting data. The study sample were asked to express their attitudes towards the usage of mobile phone applications in education. All data were analyzed with the SPSS personal computer program. Appropriate statistics for description (frequencies, percentage, means, standard deviations, and Chi2) were used. The results showed that calculated Chi2 value is bigger than the value of Chi2 derived from statistical tables. Thus, the null hypotheses (H0) rejected. Rejection of the null hypotheses indicates that the difference is significant in favor of the usage of mobile phone applications in the educational process.

INCREASING FATIGUE DURABILITY OF A BOLT JOINT/SRIEGINĖS JUNGTIES CIKLINIO ILGAAMŽIŠKUMO DIDINIMAS TAIKANT DETALIŲ TARPUSAVIO PASUKIMIŲ BŪDĄ

A method of increasing the fatigue durability of a bolt joint is considered. It is based on the position of the nut with respect to the bolt. Turning the nut causes its threads to be in contact with different threads of the bolt during sequential periods of use. The thread of the bolt which experiences the highest loading is in contact with the first (most dangerous) thread of the nut. With further nut turns, the bolt thread experiences less loading because of the contact with another (less dangerous) threads of the nut. Reducing the loading in this way can increase the fatigue durability. The nut position with respect to the bolt can be controlled using different heights of washer-bushing. The durability calculation is based on the fatigue curve for the bolt joint when it is tested without turning the nut. The sum of damage is calculated for all points of the bolt thread which are in contact with the first turn of the nut for any loading period. According to the Miner's rule, fatigue failure occurs when the sum of damage is equal to one. The mathematical model for calculating the maximum fatigue durability of bolt joint is given. It is assumed that the height of washer-bushing, the number of turns of the nut and the fatigue curve for the threaded bolt joint are known. The survival condition is that for any point on the bolt, the sum of damage after the last loading period must be less than one. A personal computer program for the fatigue durability calculation is prepared, and some example problems are solved. An analysis of the results is presented.

Electrophoresis-tutor: an image-based personal computer program that teaches clinical interpretation of protein electrophoresis patterns of serum, urine, and cerebrospinal fluid

High-resolution protein electrophoresis of serum, urine, and cerebrospinal fluid (CSF) can aid in the diagnosis of multiple myeloma, amyloidosis, macroglobulinemia, multiple sclerosis, and other diseases. Electrophoresis-Tutor is a personal computer program based on approximately 150 digital images that teaches the clinical interpretation of agarose gel electrophoretic patterns. The program is divided into the following sections: introduction, CSF, serum, urine, review of disease states, program navigator, and final exam. The CSF section describes normal and abnormal CSF findings with emphasis on oligoclonal banding, as seen in the CSF of patients with multiple sclerosis. The serum section emphasizes monoclonal gammopathy patterns but also has detailed descriptions of inflammation, liver disease, protein-losing disorders, genetic deficiencies, and other patterns. Monoclonal gammopathy is described in the context of specific associated clinical conditions (e.g., myeloma, amyloidosis). For each monoclonal gammopathy example, results of standard electrophoresis, densitometry, and immunofixation are presented. The review of disease states uses animation to illustrate the development and remission of a variety of pathological patterns. The program navigator allows the user to jump quickly to any place in the program. The optional exam contains 20 questions, and detailed feedback is given after each question. Electrophoresis-Tutor can be used as a stand-alone teaching tool, a companion to traditional instruction, or a reference source.