Performance of Teaching and Learning Technology Internship Students as Perceived by Their Trainers

The purpose of this descriptive study is to evaluate the performance of teaching and learning technology students of the College of Education, Sultan Qaboos University during their internship experience. Trainers of the interns rated them on 15 items of performance as displayed in the questionnaire of the study. The internal consistency of the questionnaire was significantly high (.96). It was observed that the general level of performance of the interns was high (a mean of 4.40 out of 5) and the ratings of the individual items of performance ranged from 4.04 to 4.59. However, no gender significant differences were observed in the global ratings of males and females. Apart from this, it was found that 2014 cohort interns performed better than earlier cohorts (before 2014).  The study reveals other significant findings such as location of internship (public or private sector) did not affect performance of interns. Similarly, type of institution (educational or non-educational) was not a significant factor of performance, however, interns in non-educational institutions performed better (though not significantly) than interns in educational institutions). Interns with higher GPAs outperformed their colleagues with lower GPAs. Keywords: Internship evaluation, supervisors’ ratings of interns, teaching and learning technolog

The physics and kinematics of the evolved, interacting planetary nebula PN G342.0-01.7

Here we aim to study the physical and kinematical characteristics of the unstudied old planetary nebula (PN) PN G342.0-01.7, which shows evidence of interaction with its surrounding interstellar medium. We used Integral Field Spectra from the Wide Field Spectrograph on the ANU 2.3 m telescope to provide spectroscopy across the whole object covering the spectral range 3400-7000 {\AA}. We formed narrow-band images to investigate the excitation structure. The spectral analysis shows that the object is a distant Peimbert Type I PN of low excitation, formally of excitation class of 0.5. The low electron density, high dynamical age, and low surface brightness of the object confirm that it is observed fairly late in its evolution. It shows clear evidence for dredge-up of CN-processed material characteristic of its class. In addition, the low peculiar velocity of 7 km s$^{-1}$ shows it to be a member of the young disk component of our Galaxy. We built a self-consistent photoionisation model for the PNe matching the observed spectrum, the H$\beta$ luminosity, and the diameter. On the basis of this we derive an effective temperature $\log T_{\rm eff} \sim 5.05$ and luminosity $1.85 < \log L < 2.25$. The temperature is much higher than might have been expected using the excitation class, proving that this can be misleading in classifying evolved PNe. PN G342.0-01.7 is in interaction with its surrounding interstellar medium through which the object is moving in the south-west direction. This interaction drives a slow shock into the outer PN ejecta. A shock model suggests that it only accounts for about 10\% of the total luminosity, but has an important effect on the global spectrum of the PN.Comment: 15 pages, 6 figures, A&A accepted 201

INVESTIGATION OF THYROIDS DYSFUNCTION AMONG INFERTILE WOMEN IN NASIRIYAH CITY

Objective: Epidemiological studies revealed that 10-15 % of couples in the world experience infertility. Thyroid dysfunction (hyperthyroidism and hypothyroidism) possessed adverse effect on reproductive health and resulted in, interference with ovulation, reduced rates of conception, increased early pregnancy loss, and adverse effects on pregnancy and neonatal outcomes. The current study aims to explore the thyroid dysfunction among infertile women in Nasiriyah city-Iraq. Methods: The study was conducted on 60 infertile women (age group 17–45 y) who visited infertility departments in Al-Hussein hospital, Al-Haboubi hospital and Bent AL Huda hospital, in Nasiriyah city, from October 2019 to March 2020. Thirty normal females (age matched) were taken as controls. TSH, T3, T4, LH, FSH, prolactin, progesterone and estradiol levels were determine by using VIDAS® Assay. Results: The prevalence of hyperthyroidism among infertile women was 13.33% and hypothyroidism was 10.00%. Both hyper and hypothyroidism induced adverse changes in the serum levels of LH, FSH, prolactin and gonadal hormones. Conclusion: Thyroid dysfunction was associated with a risk of not getting pregnancy. Women were advised to achieve euthyroidism before planning a pregnancy

PERFORMANCE EVALUATION OF THREE-PHASE INDUCTION MOTOR DRIVING AN ELECTRIC VEHICLE UNDER DIFFERENT ROAD CONDITIONS

Electric vehicles (EV) has been introduced as an alternative to the conventional vehicle as a mid-range vehicle to the world due to environmental considerations and technology development. Many electric motors can be used as the main driver of electric vehicles. Induction Motor (IM) is one of these types. This search uses MatLab/Simulink program for modeling and simulating MITSUBISHI I-MIEV type vehicle as a model of city vehicle based on an IM as the main engine. Four cases were studied by simulating a complete (EV + IM) model with different slopes of road, wind speeds, different road types, and different speeds of vehicle. Simulation tests indicate the IM's ability to drive the electric vehicle in high stability. Thus the specifications of EV depend upon the specifications of IM used as the main drive for EV and mechanical components for EV

PERFORMANCE ASSESS OF SELF-EXCITED IG DRIVEN BY WIND TURBINE WORKING WITH FC-TCR

This work presented a self-excited induction generator (SEIG) model controlled by an (FC-TCR) fixed capacitor-thyristor control reactor consisting of a large fixed capacitor in parallel with a thyristor controlled reactor in series with the constant inductance. Induction machines were used because they are capable of working at different speeds. The 3-phase IG was driven by the prime mover that represents the wind turbine. Also, constant voltage and frequency were obtained, regardless of the change in velocity, by using proportional integration (PI control) for each of them. This type of generator is used in isolated rural areas far from power transmission lines. The voltage and frequency are analyzed for each wind speed proposed in the model and calculating the required excitation amplitude and torque required to drive the induction generator. Therefore, it is now a key interest to develop an efficient, viable, economic, and controllable induction generator for harnessing energy from renewable sources. The strategy of control was implemented with MATLAB/Simulink

Algorithm for enhancing the QoS of video traffic over wireless mesh networks

One of the major issues in a wireless mesh networks (WMNs) which needs to be solved is the lack of a viable protocol for medium access control (MAC). In fact, the main concern is to expand the application of limited wireless resources while simultaneously retaining the quality of service (QoS) of all types of traffic. In particular, the video service for real-time variable bit rate (rt-VBR). As such, this study attempts to enhance QoS with regard to packet loss, average delay, and throughput by controlling the transmitted video packets. The packet loss and average delay of QoS for video traffic can be controlled. Results of simulation show that Optimum Dynamic Reservation-Time Division Multiplexing Access (ODR-TDMA) has achieved excellent utilization of resource that improvised the QoS meant for video packets. This study has also proven the adequacy of the proposed algorithm to minimize packet delay and packet loss, in addition to enhancing throughput in comparison to those reported in previous studies