RECTENNA DESIGN FOR WIRELESS POWER TRANSMISSION

The solar energy received by the solar cells satellite in space produced electricity. Then the electricity will be converted into microwave signal. The microwave signal will be transmitted by the satellite's transmitter, wirelessly and received by the rectifying antenna or known as 'rectenna' on the Earth. Rectenna acts as microwave receiver and a converter of microwave signal into DC power. This system is known as Wireless Power Transmission system (WPT). The frequency for the rectenna element is 2.45 GHz. Nevertheless, the simulations and analysis concentrate only on power rectangular microstrip patch antenna (RMPA) and Schottky diode using Microwave Office 2004 simulation. In reality the achieved of the transmitted power is merely at 0.9% bandwidth. Thus, to improve it to more than 0.9% of bandwidth, a research on dielectric substrate is required. The design of the rectenna is also crucial so that the 0.9% of bandwidth or more can be achieved. By using this simulator, the performances of these two elements can be obtained. Based on the results, the PTFE/Glass mix dielectric substrate offered better performance than the other dielectric substrate, producing 1.84% of antenna bandwidth. For the Schottky diode, the total power that has been successfully analyzed is at 1769923.5 mW. The diode conversion efficiency has been evaluated as 44.375%. This project covers chapter 1, for introduction, chapter 2 for literature review, chapter 3 for methodology, chapter 4 for results and discussions and chapter 5 for conclusion and recommendation. Overall, the simulations have been successful, thus the objectives of the project are achieved

Latent Autoimmune Diabetes in Adults in the United Arab Emirates: Clinical Features and Factors Related to Insulin-Requirement

AIMS: To describe and to characterize clinical features of latent autoimmune diabetes in adults (LADA) compared to type 1 and type 2 diabetes in the UAE. METHODS: In this cross-sectional study a dataset including 18,101 subjects with adult-onset (>30 years) diabetes was accessed. 17,072 subjects fulfilled the inclusion/exclusion criteria. Data about anthropometrics, demographics, autoantibodies to Glutamic Acid Decarboxylase (GADA) and to Islet Antigen 2 (anti-IA2), HbA1c, cholesterol and blood pressure were extracted. LADA was diagnosed according to GADA and/or anti-IA2 positivity and time to insulin therapy. RESULTS: 437 (2.6%) patients were identified as LADA and 34 (0.2%) as classical type 1 diabetes in adults. Mean age at diagnosis, BMI, waist circumference, systolic blood pressure and HbA1c significantly differed between, LADA, type 2 and type 1 diabetes, LADA showing halfway features between type 2 and type 1 diabetes. A decreasing trend for age at diagnosis and waist circumference was found among LADA subjects when subdivided by positivity for anti-IA2, GADA or for both antibodies (p=0.013 and p=0.011 for trend, respectively). There was a gradual downward trend in autoantibody titre in LADA subjects requiring insulin within the first year from diagnosis to subjects not requiring insulin after 10 years of follow-up (p<0.001). CONCLUSIONS: This is the first study describing the clinical features of LADA in the UAE, which appear to be different from both type 1 and type 2 diabetes. Furthermore, we showed that the clinical phenotype of LADA is dependent on different patterns of antibody positivity, influencing the time to insulin requirement

Job Empowerment and Its Relationship to Job Satisfaction Among Faculty Members in Higher Education - Saudi Arabia

This study empirically investigates the correlation between job empowerment (JE) and job satisfaction (JS) among faculty members at Imam Abdulrahman bin Faisal (IAU) in Saudi Arabia. It also explores whether faculty members’ gender and years of experience and their own supervisors’ gender are associated with JE and JS levels. In this study, a descriptive approach was implemented, and a random sample of 345 faculty members at IAU rated their attitudes toward JE and JS using a questionnaire developed by the researchers. The findings indicate that the levels of JE and JS came to a “high” level with means of 3.72 and 3.66 respectively; and that JE is significantly correlated to JS (r=0.81, p<0.001). Further findings revealed statistically significant differences in the responses on JE and JS attributed to gender in favor of the female faculty (p<0.05); as well as a statistically significant differences in the responses attributed to supervisors’ gender (p<0.05). These findings indicate that the female leaders may be more effective than their male counterparts in empowering and affecting the JE and JS levels of their subordinates. The study recommends that upper-leadership need be role modeling practices that support the empowerment of faculty members, such as granting independence and authority in solving problems, and allowing active participation in upper-level committees and workgroups that set the strategies, policies and procedures that governs IAU. This study also recommends further empowerment of academic women into leadership positions to participate in directing the JE and JS practices towards faculty effectiveness in IAU

The Role of Private School Principals in Total Quality Mangagement and its Relation with Educational Leadership Style

The study aimed to explore the roles of private school principals in total qualitymangagement and its relation with leadership style from the perspective of the teachers. A random sample of teachers (N=100) was selected from private schools in Muscat during the academic year 2015/2016. Two instruments were tailored to achieve the objective of the study. One, measured the role of principal in total quality management, and the other measured leadership style. The results revealed that principals of private schools use total quality management to a medium level and they follow the democratic style in their leadership. Also, there was a relationship between TQM and leadership style. The study offered few recommendations that may help implement TQM in private schools

Polyploidy in chronic lymphocytic leukemia with p53 deletion detected by fish: a case report

We report a case of chronic lymphocytic leukemia with a characteristic cytogenetics finding detected by fluorescent in situ hybridization. This case has deletion in p53 gene in 50% of interphase nuclei studied in the peripheral blood and polyploidy in 30% of cells. To our knowledge polyploidy is not commonly reported with chronic lymphocytic leukemia patients

THE POSSIBLE CARDIOPROTECTIVE EFFECTS OF DIFFERENT FRACTIONS OF ARTICHOKE EXTRACTS AGAINST 5-FU INDUCED CARDIOTOXICITY IN ALBINO RATS

Objective: The present study aimed to evaluate the cardioprotective effects of ethyl acetate and methanolartichoke extracts(Cynara scolymus L.) against 5-Flurouracil (5-FU) induced cardiotoxicity in rats.Methods: Thirty-six albino rats were divided randomly and equallyin to six groups (each group with 6 rats): I, negative control, received (2 ml/kg/d)of dimethyl sulfoxide (DMSO) orally for 30 successive d; II, positive control, received (2 ml/kg/d) of (DMSO) orally for 30 successive d, and subsequently administered a single dose of 5-FU (150 mg/kg) by intraperitoneal injection on 27thd in assossiation with DSMO; III and V, received (200 mg/kg/d) of oral methanol and ethyl acetate artichoke extracts respectivelyfor 30 successive d; V and VI, received(200 mg/kg/d) of oral methanol and ethyl acetate artichoke extracts respectively for 30 successive d,with a subsequently received single dose of 5-FU (150 mg/kg) by intraperitoneal injection on 27th d of the experiment.Results: Prophylactic treatment of ethyl acetate and methanol artichoke extracts significantly attenuates the increased level of serum cardiac troponin T (CTn-T) and tumor necrosis factor-a(TNF-a)caused by 5-FU-induced cardiotoxicity in experimental albino rats while it increases the serum level of total antioxidant capacity (T-AOC).Conclusion: Results of the present study suggest that methanol and ethyl acetate artichoke extracts may be an effective modulator in mitigating 5-FU induced cardiotoxicity.Â

A Study of the Pelagic Larval Duration of Acropora humilis, Coral Recruitment and Connectivity in the Saudi Arabian Red Sea

Combined knowledge of the pelagic larval duration of coral species and coral recruitment patterns can provide evidence of inter-reef connectivity and indicate a reef’s ability to recover. We attempted to determine the maximum pelagic larval duration of Acropora humilis. Larvae were reared in a controlled environment unfavorable for settlement. The larvae lived in a pelagic state for a maximum of 29 days, although this is probably an underestimate of actual longevity for this species. Given the information available from the literature with respect to larval dispersal rates, it is not expected that larvae with this longevity will disperse further than 10-20 km from their natal reef, if at all. A long-term recruitment monitoring project was also set up on Abu Shosha Reef, which suffered nearly complete coral loss due to a bleaching event in summer of 2010. In April 2011, 60 settlement plates were placed on the reef. In July, a total of 102 living scleractinian recruits were counted on the plates. While pocilloporids were the most dominant recruits on the reef (57.8%), about 20.6% of living recruits belonged to Acroporidae, a family whose live cover on the reef is extremely low (0.67%). However, the overall mean density of recruits was very low (1.7 living recruits/100cm2) compared to similar studies around the world despite the spawning season having just ended. Fish surveys showed herbivore biomass to be very low compared to other reef systems in the world, but densities were significantly higher than another reef in the Red Sea with about 10 times more live coral cover. Recovery from bleaching for Abu Shosha and similar reefs in the region may be very slow relative to rates observed in other parts of the world if recruitment rates and herbivore communities remain low

Synthesis and anti-mycobacterial evaluation of some new isonicotinylhydrazide analogues

AbstractThe synthesis of some new 3,4-disubstituted thiazolylideneisonicotinohydrazide derivatives 3a–k, 2-substituted thiazolidinylisonicotinamide derivatives 4a–d and pyrrolylisonicotinamide derivatives 5, 6 and 7 is described. The resulted compounds are evaluated for their in vitro antitubercular activity. The minimum inhibitory concentration (MIC) of compound 3g showed comparable in vitro activity to isoniazid against Mycobacterium tuberculosis H37Ra 7131 strain in concentration 9.77μg/mL

Morfologi Kelenjar Anal Musang Luak Betina (Paradoxurus Hermaphroditus)

The common palm civet (Paradoxurus hermaphroditus) is one of the mammalian in Indonesia which have anal gland in female and fefemale that located in the lower tail. This research was aimed to describe the morphology of anal gland of common palm civet female. One female of common palm civet was used in this research which observed macroscopic and microscopic.The result showed that common palm civet have a pair of anal gland which hasshaped like ball and located in the anal sacs wall\u27s in the ventrolateral of anus.Each anal gland has a ostium of anal canal dorsolaterally in the cutaneous zone of anal canal . Microscopic observation  showed a well developed sebaceous gland and apocrine sweat gland in the wall of anal sac. Sebaceous and apocrine glands were excreted their product into main ductus to the anal canal

Population dynamics of citrus whitefly, Dialeurodes citri (Ashmead) on Citrus reticulate (Mandarin) var. Kinnow as influenced by weather conditions

A field study on population dynamics of citrus whitefly, Dialeurodes citri (Ashmead) on citrus mandarin (var. Kinnow) was carried out during 2014-15 at Centre of Excellence (COE) for Fruits situated in village Mangiana of district Sirsa, Haryana. The population of nymphs and adults of this pest was recorded from March 2014 to February 2015 at weekly interval. The nymphal population of the pest was observed only between 12th to 47th meteorological standard weeks (SW) with two major peaks i.e. one during 16th SW with a population of 83.44 nymphs/ 20 leaves and the second during 40th SW with a population of 133.22 nymphs/20 leaves. The above said population dynamics confirmed that this pest remained inactive in pupal stage during winter i.e. 48th to 11th SW. Similar trend was observed in respect of adult population. Nymphal population showed significant positive correlation with morning relative humidity (r = 0.329) and sunshine hours (r = 0.362), while adult population was found to have positive correlation with sunshine hours only (r = 0.332). Multiple regression analysis of the pest population with environment variables indicated that out of 45 per cent variability in nymphal population, 37 per cent was due to relative humidity and sunshine hours. Out of the total variability of 30 per cent variation in adult population, 20 per cent was due to evening relative humidity, while 10 per cent attributed to sunshine hours. The other weather parameters were found to have no significant correlation with the pest population. Although study of population dynamics of this study were conducted elsewhere but this is first study of its kind in the state of Haryana. The population dynamics revealed by this study have far reaching significance in pest management strategy as integrated control measures may be focused only during the period wherein population exceeds economic threshold level (ETL). The information on population dynamics of any insect pest in a given ecological niche should be considered as starting point for evolving eco - friendly pest management package