The Experimental Investigation of The performance of Phosphor Coating

Different screen printing parameters have a distinct effect on the quality of coating that is created. This experimental work looked to measure these parameters. It is divided into two parts where the first part measured the surface wettability of various substrates Wettability measurement was performed through measuring the contact angle between the droplet and the substrate surface. Varying the UV exposure time by putting substrate in the UV ozone cleaner has a considerable effect on the wettability of the surface. Water was supplied to a PEDOT: PSS substrate via Fibro DAT 1100 which is attached to a camera and a computer for capturing and analyzing coatings for the spread of a water droplet on the substrate surface. From these analyses, the main aim is to measure the contact angle between the droplet and the substrate surface which indicates the surface wettability. Some factors may affect the wettability of the surface such as varying the UV time and varying the hold time. As a result, increasing these times will decrease the contact angle where a small contact angle indicates a favorable wettability. The second part measured the electrical resistance and transparency of the printed ink after various printing experiments such as implementing UV treatment, changing the ink and changing the mesh ruling. The Rheometer device was used to test the properties of the specimen. Where this device can be used to measure the properties of the specimen such as the shear modules, in this paper the plate was used to effect on the specimens, where different readings are recorded for these specimens. Also, 24 samples were prepared and the electrical resistance for these samples was measured in this paper. As a result, the electrical resistance for treated samples was greater than that for untreated samples; the electrical resistance of Elentan ink was greater than that for PEDOT at the same conditions. Changing the screen size from (61-64) to (40-100) increase the value of resistance at the same conditions. For the transparency measurements the Elentan ink had a higher transparency than PEDOT ink. The paper also carried out an analysis for the relation between the thickness of the phosphor layer and the lamp output, where the relation was inversely proportion

The effect of teacher implemented Joint Attention intervention on improving teacher- child communication and social interaction among children with ASD

This study aimed to investigate the effectiveness of teacher implemented JA intervention on improving teacher- child communication and social interaction among children with ASD. A pretest-posttest design, where the dependent variables are measured once before the treatment is implemented and once after it is implemented, was employed. MW Test was employed, run by SPSS V18.0.  MW Test results indicated the effectiveness of teacher implemented Joint Attention intervention on improving teacher- child communication and social interaction among children with ASD. This study could contribute to the literature on teacher implemented Joint Attention intervention as there is dearth research in this area. The study is concerned with training young children with ASD in joint attention which may have substantial effect on their communication and social interaction

Evaluation and Enhancement of Public Cyber Security Awareness

With the spread of the Internet and the technology, Cyberspace has become the life of everyone, which requires them to be aware of the threats of it. Also, to be prepared with the speed of the technology, whether electronic payment, social life, leisure work IOT، and everything. However, in spite of increasing security practices there has been a rise in the cyber security threats and attacks. As the life is becoming more and more dependent on the technology, the need for cyber security awareness has become an important activity that need to be practiced in order to be safe and secure from the increasing cyber threats. Considering these factors, this thesis focuses on developing and implementing the two cyber security awareness games, mainly Password Protector and Malware Guardian. As cyber security is a vast area and requires various secure practices that need to be adopted the scope of the study is limited to password security and malware protection. Saudi Arabia is one of the fastest developing countries which has observed a tremendous increase in the use of internet and technology services and also the mobile devices for accessing various services. However, this adoption of technology is relatively new to the larger section, and the security practices that need to followed, may not be fully recognised by the population. Considering these developments, Saudi Arabia is used as the study location for implementing and evaluating the games. Initially a pilot study using a questionnaire based survey is conducted for understanding the level of cyber security awareness relating to the cyber security practices in Saudi Arabia. The results analysed from the study reflected poor understanding and awareness about password protection and malware concepts among the population. One of the interesting aspects identified from the pilot study is that most of the participants preferred mobile based application for generating cyber security awareness. Accordingly, two mobile games are developed. In order to evaluate the impact of the games, a pre-study test was carried out using an online survey questionnaire to record the understanding of passwords and malware among the participants. Then the mobile games Password Protector and Malware Guardian were distributed to the participants using the download link. The participants used the games for three weeks, and then undertook the same survey that was used before playing the game. The impact of the games is then analysed by comparing the changes in the awareness levels of the participants after using the games. The results from the study were found to be having positive impact as the awareness levels have increased significantly among the participants. Participants ability to create a strong and complex password has been improved significantly after playing the Password Protection game. Similarly, participants awareness levels about the malware threats and the safety measures that need to be taken such as backup, installing anti-malware software, updates etc. was improved significantly after using the Malware Guardian game. The overall findings were discussed, analysed and correlated with influencing factors and explained in this study. Accordingly, this study has found that the gamification can significantly enhance cyber security awareness

A preliminary study on whether HbA1c levels can predict visual dependence for spatial orientation in asymptomatic Type 2 diabetic patients

Introduction: Diabetes-induced vestibular dysfunction has been commonly reported, and asymptomatic patients with type 2 diabetes display higher degrees of perceptual visual dependence for spatial orientation than healthy controls. This study aims to assess whether HbA1c can predict such visual dependence in the diabetic patients. Methods and Materials: Diabetic patients were divided into 2 groups: 22 subjects with “good” (HbA1c < 7%) and 25 with “poor” (HbA1c ≥ 7%) glycemic control. Otolithic vestibular function was tested using the computerized rod-and-frame test (CRFT) and results for the two diabetic groups were compared to 29 healthy controls. Results: When the frame was tilted, the diabetic group with “good” glycemic control had largest positioning errors, with a significant difference only in comparison to the control group. The “good” glycemic group exhibited larger degree of asymmetry under titled frame condition. Although HbA1c was not associated with vestibular asymmetry in any diabetic group, it was significantly associated with visual dependence in the “good” glycemic group. During frame tilts, 10 diabetic patients had positioning errors above the reference range of 3.3°, 8 of which belonged to the “good” glycemic diabetic group. Conclusions: Diabetes disease processes may affect vestibular symmetry during visuo-vestibular conflicts, even in asymptomatic diabetics within the recommended glycemic range. The weak correlations between HbA1c and CRFT parameters may indicate that HbA1c cannot fully predict visual dependence or asymmetry on the CRFT in patients with diabetes, and different glycemic disorders may affect vestibular dependent spatial orientation in diabetic patients

Impact of administrative practices on Job performance in Alhada Military Hospital

Aim: The current study's purpose was to find out the impact of administrative practices on job performance in Alhada Military Hospital. Methodology: A quantitative descriptive design was used in the study. 369 participants employed in Alhada Military Hospital were recruited based on convenience sampling. A survey was distributed to participants to obtain demographic data and data on administrative practices (human resources planning, communication, and decision-making). The collected responses were subsequently entered into SPSS software for descriptive statistics, ANOVA tests, and regression analysis to establish the association between research variables. Results: Overall, 369 participants participated in the survey, the demographic results showed males constituting a majority at 61.5% (227) and females accounting for 38.5% (142), and the majority of participants are between the ages of 30 and 40, representing a significant 57.2%. with more participants having a Bachelor's education. Results from the ANOVA test and regression analysis revealed a shows Human resources planning demonstrates a notably strong positive relationship with job performance, as indicated by a beta coefficient of 0.963 and a statistically significant T-value of 16.733 at p=0.01. In contrast, communication, with a Beta of 0.0650, shows a relatively weaker positive association with job performance, but it's still statistically significant with a T-value of 1.972 at p=0.0490. On the other hand, decision-making, bearing a beta of 0.0240 and a T-value of 0.423, does not exhibit a statistically significant relationship with job performance at p=0.672. Conclusion: Overall, the study found a strong association between these administrative practices and job performance, particularly for human resources planning. However, decision-making seemed to have a less pronounced impact. This study calls on healthcare policymakers to periodically review and update policies related to administrative practice

Intravenous angiotensin II for the treatment of high-output shock (ATHOS trial): a pilot study

Introduction: Patients with distributive shock who require high dose vasopressors have a high mortality. Angiotensin II (ATII) may prove useful in patients who remain hypotensive despite catecholamine and vasopressin therapy. The appropriate dose of parenteral angiotensin II for shock is unknown. Methods: In total, 20 patients with distributive shock and a cardiovascular Sequential Organ Failure Assessment score of 4 were randomized to either ATII infusion (N?=?10) or placebo (N?=?10) plus standard of care. ATII was started at a dose of 20?ng/kg/min, and titrated for a goal of maintaining a mean arterial pressure (MAP) of 65?mmHg. The infusion (either ATII or placebo) was continued for 6?hours then titrated off. The primary endpoint was the effect of ATII on the standing dose of norepinephrine required to maintain a MAP of 65?mmHg. Results: ATII resulted in marked reduction in norepinephrine dosing in all patients. The mean hour 1 norepinephrine dose for the placebo cohort was 27.6???29.3 mcg/min versus 7.4???12.4 mcg/min for the ATII cohort (P?=?0.06). The most common adverse event attributable to ATII was hypertension, which occurred in 20% of patients receiving ATII. 30-day mortality for the ATII cohort and the placebo cohort was similar (50% versus 60%, P?=?1.00). Conclusion: Angiotensin II is an effective rescue vasopressor agent in patients with distributive shock requiring multiple vasopressors. The initial dose range of ATII that appears to be appropriate for patients with distributive shock is 2 to 10?ng/kg/min. Trial registration Clinicaltrials.gov NCT01393782. Registered 12 July 2011

European propolis is highly active against trypanosomatids including Crithidia fasciculata

Extracts of 35 samples of European propolis were tested against wild type and resistant strains of the protozoal pathogens Trypanosoma brucei, Trypanosoma congolense and Leishmania mexicana. The extracts were also tested against Crithidia fasciculata a close relative of Crithidia mellificae, a parasite of bees. Crithidia, Trypanosoma and Leishmania are all members of the order Kinetoplastida. High levels of activity were obtained for all the samples with the levels of activity varying across the sample set. The highest levels of activity were found against L. mexicana. The propolis samples were profiled by using liquid chromatography with high resolution mass spectrometry (LC-MS) and principal components analysis (PCA) of the data obtained indicated there was a wide variation in the composition of the propolis samples. Orthogonal partial least squares (OPLS) associated a butyrate ester of pinobanksin with high activity against T. brucei whereas in the case of T. congolense high activity was associated with methyl ethers of chrysin and pinobanksin. In the case of C. fasciculata highest activity was associated with methyl ethers of galangin and pinobanksin. OPLS modelling of the activities against L. mexicana using the mass spectrometry produced a less successful model suggesting a wider range of active components

Effect of Fibre Content on Compressive and Flexural Properties of Coconut Fibre Reinforced Epoxy Composites

Coconut fibre reinforced polymer composites are gaining popularity in the field of engineering due to the many benefits that come with them such as low cost of production, easy fabrication, enhanced strength compared to other polymer composites. Of late, there has been an increase in the use of composites that are naturally based because they have many benefits. In line with this, the current research is focused on the mechanical properties of coconut fiber reinforced epoxy composites. The effect of the fibre content on the flexural and compressive characteristics of the epoxy composites was investigated. Chemical treatment of the coconut fibres was performed using 50% bleaching concertation. The composites were fabricated in random orientations withe fibre length of 10 mm as recommended by the literature. Scanning Electron Microscopy (SEM) was used to examine the fractured surfaces. The main findings are that the increase in the volume fraction of the coconut fibre in the epoxy composites increases the flexural and compressive strengths. SEM showed that the main failure mechanisms were brittle nature in the epoxy regions and pullout and breakage of fibres in the coconut region

Tribological Performance of Materials Under Bio-Three Body Abrasion

This study aims to investigate the effects of seed grinding process on the tribological characteristics of components in agricultural machines. The objective is to conduct the the effect of third body presence such as seeds on the tribological behavior of agriculture machines and evaluate the fracture mechanism of the seeds under three body abrasion loading conditions. The work consists of two main parts: Firstly, mechanical test which is related with the Hounsfield compression machines test and understanding the mechanical behaviour of wheat seed (Triticum aestivum) under compressive loading conditions. Secondly, the research aim to modify the current tribology machine to perform three body abrasion owing to test the rubbed components under seed third body configuration. Moreover, for each grind attempt, different discs have been used such as; the rubber disc, mild steel disc and stainless steel. The mechanical results revealed that the samples have maximum forces need to breakdown (rapture) the seed was (125 N) and minimum (84 N) average for all samples (102 N), stress results were maximum (1.81 Mpa), minimum (1.26 Mpa), average for all samples (1.58 Mpa) and in regarding to elongation average result was (0.86 mm). The failure mechanism was clear fracture in the seeds due to the brittleness behaviour of the seed and splitting of the seeds into two halves is the obvious damage feature. For the tribology machine, different attempts have been used to modify the machine to conduct the three-body abrasion for the grindings the seeds. However, there is no attempt displayed a good result. Grinding process for wheat seed by using rubber disc exhibited no result comes out because the seeds surfaces’ tribological properties cannot affect the rubber surface and both have the same smoothness surfaces. In another word, the seed shape is not multi-angles or has not brittle shape (nature) to provide better contact with rubber disc. Secondly with applying mild steel for grinding the same result find out the seed cannot grinding because the disc tribological still cannot supply best condition to crush seed might be this issue related with the shape of wheat seed also which is ellipse shape and the steel is highly smoothed. Therefore, both disc and seed are circle shape that is making them rotating each other’s rather than effect surface each other. Finally, the modification has been done for the tribo-machine enhancing the grinding operation. The modification was putting gear under the mild steel disc. This strategy helps the process quite successfully