The effect of twin planes in YBa2Cu3O7 on the superconducting current flow is investigated. A single crystal containing only two twin planes is studied magneto-optically up to 1 T. It is found that flux enters the crystal very easily along the twin planes, but that it does not leave the sample preferentially along the twin planes. The flux present in the twin planes reduces the flux penetration...

background fungi have been extensively isolated and investigated from skin in various parts of the world. determining the mycoflora of normal people is important when the role of skin is considered as a reservoir for microorganisms. objectives the current study aimed to investigate the incidence of fungal flora on interdigital spaces of the human foot. patients and methods samples were collecte...

the present research has been carried out to study the structure of indexing language databases of irandoc. three databases have been selected as a sample: iranian dissertation abstracts. directory of scientific meetings held in iran. current research in iranian universities and research centers. some descriptors have been selected as a sample for study. to analyze the descriptors checklist was...

A pilot study asks whether something can be done, should the researchers proceed with it, and if so, how. However, a pilot study also has a specific design feature; it is conducted on a smaller scale than the main or full-scale study. In other words, the pilot study is important for improvement of the quality and efficiency of the main study. In addition, it is conducted in order to assess the ...

A structured questionnaire was verbally administered individually to a random sample of the general population, 18 years of age and older, of rural and urban Chandigarh and of two villages in Jullundur district, Punjab. Out of a total of 1031 respondents, 23.7 percent were current users, 16.0 percent admitted of alcohol use in the past but were not current users, and 60.3 percent had never had ...

the current study aimed to investigate the attitudes of postgraduate students of physical education and sport sciences towards discipline diversity. the statistical sample included all physical education postgraduate students in 1385-86 semester from five public universities in tehran. the current study was a descriptive, survey-based study and data were gathered using researcher-made questionn...

This paper presents a new control method for simultaneous compensation of instantaneous reactive power and current harmonics by parallel active filters (PAFs). Reference compensating currents of PAF are calculated using the subtraction of instantaneous power from its average value. In this way, it is possible omitting high/low pass filter(s) from the control circuit of PAF, which usually result...

the thermally stimulated discharge (tsdc) current is studied for acrylonitrile butadiene rubber (nbr) loaded with different high abrasion furnace carbon black (haf). tsdc peak appears only for higher haf contents > 60phr (70 and 80phr of haf contents), the tsdc spectra consist of a sharp peak corresponding to a peak temperature tm which is slightly shifted to higher temperature for 70phr ...

The detection of surface cracks at or close to sample edges is a challenging problem because the interaction eddy current with edge can make it difficult distinguish changes in signal due defect. Samples poor electrical conductivity such as titanium alloys used extensively aerospace applications be more inspect low amplitude currents induced them and increased electromagnetic skin depths lower ...