Evolution of the Drift Waves in the Umist Linear system

Evolution of the Drift Waves in the Umist Linear syste

Nonlinear TE Electromagnetic Surface Waves in a Ferrite Layered Structure

Characteristics of TE electromagnetic surface waves propagating in a nonlinear dielectric film bounded by a ferrite cover are examined theoretically. A dispersion relation based on Jacobian Elliptic Functions is derived, which describes the behaviour of the nonreciprocal nonlinear waves. ) TE ( . ) Jacobian Function (

COLLISIONAL DRIFT WAVES OF A WEAKLY MAGNETIZED PLASMA

The two-fluid equations are used to derive a model of collisional drift waves for cylindrical magnetized plasmas. Both the radial electron temperature variation and the sheared BE о о× rotation in the plasmas have been taken into account. It is found that the presence of the BE о о× rotation leads to an important modification of the theory of drift waves derived by Sayasov Yu. S. and Aebischer HA (1988). The theory is applied to an experimental data of helium plasma using Runge-Kutta integration method. Our calculation shows that the temperature variation and the BE о о× rotation are important in the predictions of drift wave frequency and radial position of the maximum wave amplitude

Nonlinear Electromagnetic Surface Waves in a single hexagonal planar ferrite

Nonlinear Electromagnetic Surface Waves in a single hexagonal planar ferrit

Ionizing Radiation Leakage in Radio-Diagnostic Centers at Gaza Strip Hospitals, Palestine

The fact of using radiation in medicine has led to major improvements in the diagnostic and treatment of human diseases. However, it carries some risks of health problems. In Gaza governorates hospitals, there is tremendous development has taken place in the radio-diagnostic field and there is no clear radiation protection program, lack of clear information about radiation protection measures and guidelines. The objective of this study was an assessment whether yearly equivalent radiation dose received by the radio-diagnostic workers and public in governmental Gaza governorates hospitals are within the dose limits recommended by ICRP or not. The study was carried out in nine governmental hospitals. The hospitals were selected because of their large and diverse of their radio-diagnostic services. The radiation survey meter (OD-01) was used to measure radiation leakage. Data sheet was also used to elicit information about the radio-diagnostic rooms and machines specifications. The results indicate that the fluoroscopy and CT scan rooms were not efficiently lead lined and the radiation protection is not well organized. The measured values of radiation dose rate at different locations in basic X-ray and mammography rooms are found within a permissible limits for occupational stuff and public. However, the recommended distance between the X-ray machine and control panel have not been achieved in some rooms. Therefore, there is a desperate need for rules, regulations and radiation protection act in the field of radiation in medical field

Radiation Protection Measures in Radio-Diagnostic Centers in Gaza Hospitals, Palestine

Whereas radio-diagnostic centers have potential to present hazardous effects due of ionizing radiation. Radio-diagnostic workers awareness, practices regarding radiation protection issues, availability of radiation protection devices and effective personal radiation exposure monitoring process has an important role to safe working in these places. We carried out this study in nine governmental Gaza governorates hospitals. The study instrument was close-ended structured questionnaire consists of five parts. 182 radio-diagnostic workers participated in the work. Based on the obtained data, the participants reported that 35.2% of personal radiation protection devices are available in the radio-diagnostic centers at governmental Gaza governorates hospitals. In spite the fact that 74.8% of participants have awareness about radiation protection issues, but it is only about 53.4% of participants follows the radiation protection practices. There is an obvious poor of personal radiation exposure monitoring process. Conclusively, the results represented in this work reflect that majority of participants believe there is no radiation safety officer to provide the service. Therefore, there is a desperate need for rules, regulations and radiation protection act in the field of radiation in medical field

الموجات السطحية الكهرومغناطسية غير الخطية في تركيب طبقى يحتوي على الفرايت

Characteristics of TE electromagnetic surface waves propagating in a nonlinear dielectric film bounded by a ferrite cover are examined theoretically. A dispersion relation based on Jacobian Elliptic Functions is derived, which describes the behaviour of the nonreciprocal nonlinear waves.يتناول البحث دراسة نظرية الخصائص انتشار الموجات الكهرومغناطسية (TE) في تركيب يحتوى على شفافية من مادة عازلة غير خطية محاطة بمادة الفرايت. ولقد اشتقت معادلة التشتت التي وجدت أنها تعتمد على دوال جاكوبي (Jacobian Function) التي بدورها وصفت موجات غير خطية وغير متماثلة

MEASUREMENTS OF RADON-222 AND ITS DAUGHTER’S CONCENTRATIONS IN DWELLINGS OF GAZA STRIP, PALESTINE

MEASUREMENTS OF RADON-222 AND ITS DAUGHTER’S CONCENTRATIONS IN DWELLINGS OF GAZA STRIP, PALESTIN

TM NONLINEAR ELECTROMAGNETIC WAVES IN SEMICONDUCTOR SUPERLATICES WAVEGUIDING SYSTEMS

Considerable attention has been devoted to a nonlinear waves propagation in various wave-guide structure due to their applications in photonic-microwave devices . In this communication, the dispersion characteristics of transverse magnetic polarized waves nonlinear guided waves propagating in a multilayer semiconductor superlattices waveguide surrounded by one side by a nonlinear magnetic cover have been investigated theoretically. The two sublattice uniaxial antiferromagnetic crystal is considered as a nonlinear magnetic medium where the permeability is treated as a function of the magnetic field. Nummerical results are demonstrated for a waveguiding system containing some number of layers of superlattices. We hope that our present work could lead to several extensions and promising applications in future technology

Quality of life of type 2 diabetic patients in Erbil city

Background and objective: Diabetic patients could be at increased risk of functional disability, which needs good control of blood glucose and other risk factors and the quality of life of diabetic patients especially those who had complications is remarkably lower than the quality of life of the general population. This study was conducted to assess the quality of life of diabetic patients in its different domains from the patient's perspective in Erbil city. Methods: In this cross-sectional study, 160 diabetic patients were randomly selected from Layla Qassim diabetic health center. The WHO (WHO QOL- BREF) questionnaire was used as the main tool for data collection, which included26 questions on four domains of health-related quality of life (physical, psychological, social and environmental domains). Results: Around 49% of the patients had checked their blood sugar regularly and had better scores in the social domain (P = 0.036). Diabetic patients of all age groups had low scores in all domains of quality of life, with the lowest mean score in the psychological domain. Females reported significantly higher scores in the environmental domain (P = 0.001). Patients with insufficient monthly family income had lower scores in the social (P = 0.001), psychological (P = 0.031) and environmental (P = 0.039) domains. There was no obvious statistical association between clinical characteristics of the patients and the quality of life domains. However, those with complications had lower scores in the psychological domain, with a higher proportion (P = 0.016) of complications in females. Conclusion: All domains of quality of life are affected by diabetes mellitus, with no clear, consistent statistical association between clinical characteristics of the patients and the quality of life of various domains, which emphasize the need for more multidisciplinary team action for more patient`s education and self-care