Physical Sciences and Engineering

Background: The use of notebook computers has increasedand become very popular among computer users due to their light weight, small size, portability, and battery power optionand become the main cause of increased muscle activities in the neck and shoulder region between computer users. Purposes: To investigate the isokinetic measurements of shoulder muscle performance in notebook computer users. Design: Two groups post-test design. Materials and Methods: Thirty healthy subjects were be selected from students and employees of the Faculty of Physical Therapy Cairo university.

A fatigue test program was carried out with the aim to study the effect of the cold working process on the fatigue crack propagation life. Plate specimens of 7475-T7351 aluminium alloy containing a pre-cracked fastener hole with different edge margins have been subjected to cyclic loading of constant amplitude. During a test, the fatigue crack length was monitored using a video-camera system; the results permitted to establish the evolution of the crack along the bore and across the short ligament of the specimen.

Indoor environmental conditions, attributes of indoor air quality, their mutual correlation and SBS effect studied for non-air-conditioned residential areas of composite climate. As in residential areas like other buildings, toilets are most neglected areas as far as light and ventilation is concern. Author focused on this issue to improve IAQ and reduce SBS effect.

This Paper provides a solution to Fermat’s Last theorem alongwith the source from which the said Theorem gets derived.

Power is the most important component of infrastructure and it is extremely essential for the economic development and social well-being of countries. The existence and development of self-sufficient infrastructure is important for the continual rise of the Indian economy. India’s power sector is very much diversified. Sources of power generation vary from conventional sources such as natural gas, hydro, coal, oil and nuclear power to non-conventional sources such as solar, biomass, and wind.

The history of Africa is full of magic and supernatural activities. However, in all the sections of Hausa performing arts, oral songs are the most exalted arts that dominate many folkloric activities and control very great significant aspects of religious, political and socio-cultural consciousness in the Hausa community. The singers employ different methods and techniques of injecting poetic ideas into the minds of audience. The songs are sung with either melancholic, charming, or tranquil expressions so that their content messages are of deep impact to listeners.

This study examined the predictors of tramadol abuse among undergraduatesin Ignatius Ajuru University of Education, Port Harcourt. Two objectives and two research questions were guided this study. Multi-stage sampling procedure was adopted for the study population for the study consisted5117 students from selected faculties in the university. The sample size was determined using Yaro Yamane’s method for a finite population (n = 400).

Background: The current study was conducted to establish registry for physical therapy database of cerebral palsy patients in Mina city and its surrounding cities including (Maghagha, Matty, Mallawi, Samallott, Abu-Qurqase and Deirmawas). Children with CP were recruited from hospitals of health ministry (general hospitals), insurance hospitals, pt centers, private hospitals and units of family medicine in Minia governorate. Children were of both genders and their age ranged from birth to 18 years old.

Due to the increasing power demand, the security and safety of power systems have become major challenges. Distributed energy resources have been established for solving the problem. The fault current may exceed the capacity of circuit breakers (CBs); leading to damage to CBs and even cascading incidents such as blackouts. A fault current limiter (FCL), which can be used to reduce the current surges, has attracted considerable attention from utilities. Penetration of distribution generation is inevitable one.

The main aim of our project is to implement the 5 level neutral point clamped (NPC) inverter output using three terminal topology (3T) with open switch fault detection. Normally the grid coupled inverters to reduce the common mode leakage current we use the NPC inverter. In this type we need more number of components and to achieve the five level output. In our proposed system we use the 3T converter to achieve the 5 level output at reduced number of switches. In experimental result we use 5 level 3T converter with 4 switches.