Experimental investigation the effect of nanofluid on the pressure drop across the solar collector

This is a study on the performance of a pressure drop system of a evacuated tube solar collector. The objective of this project is to analysis the effect of nanofluid as the working fluid and temperature on the pressure drop by determining the pressure drop by using distilled water and nanofluid at different flow rate. The existing solar system installed in UMP Pekan does not measure the pressure drop. Various working fluid and mass flow rate was use in order to measure pressure drop. The experiment is conducted at solar system installed at UMP Pekan and the data is collected at three hour time interval which is at 9 am, 12 pm and 3 pm. The data analysed using the theoretical analysis and plotted in graph to discuss about it. The pressure drop obtained for nanofluid in this experiment is higher than distilled water. The minimum pressure drop within this experiment for distilled water and nanofluid is 694 Pa and 989 Pa respectively. The maximum pressure drop within this experiment for distilled water and nanofluid is 2336 Pa and 2390 Pa respectively. The pressure drop increase as the temperature increase. Within in this experiment for both working fluid the pressure drop is lowest at 9 am which is at that time temperature is the lowest. Although all the above findings refer to a particular flow rate which is for flow rate 2 , 2.5, 3.0, 3.5 litre/min, the better results can be obtained if the flow rate is varied. Finally by considering the problem of accuracy of the result, pressure transducer should be used instead of used manometer to measure the pressure drop

Tailor-made biofuel-diesel blends properties validation and engine performance

Biofuel-diesel blend offers a great opportunity in reducing the usage of petroleum based diesel and improving the pollutant emission. This study is carried out to perform engine performance testing using a set of fuel blends generated through computational work by Narayanasamy et al.(2014), the blends, content mixture of ethanol(E), butanol(B) and butyl levulinate(BL) with B5 diesel as baseline fuel. The basic properties of the fuel blends were measured according to the corresponding ASTM test method. In the previous work mentioned, Kay’s mixing rule is used for predicting density, distillation temperature, cetane number and calorific value, while an Arrhenius mixing rule is used for viscosity. The results of prediction are then validated by calculating the absolute average deviations(AAD), with the ASTM test. A high AAD obtained for viscosity (31.15%), showing a poor agreement in the prediction model for this property. The lower AAD value obtained for the other tested properties demonstrating the suitability of the used mixing rules. Engine tests on the fuels were carried out on a HINO H07C diesel engine by varying speed in the range of 1200-2400 rpm. The results shows brake specific fuel consumption(BSFC) of the blends was found to be higher than B5 fuel, while a decreasing trend in horsepower produced was observed with increasing speed. The overall observation of emission analyzed gases of CO2, CO, NOx and hydrocarbon(HC), the fuel blends showed a good reduction as compared to the B5 fuel baseline. Blend 2 which consists only the mixture of butanol was found significantly high for HC emission compared to the other blends. It is concluded that Blend 1 (0.746%B5- 0.244%B- 0.010%BL) gave better engine performance with lower BSFC for the same power output compared to the other blends. On the other hand, Blend 3 (0.757%B5- 0.123%B- 0.10%E- 0.02%BL) gives the best overall results in emission reduction among all the fuel blends

Specific interactions betweeen Nipah virus nucleocapsid (N) protein and Phospho-(P) protein using the yeast two-hybrid system (vector page tiada)

Nipah virus (NiV) which is a member of a new genus, Henipavirus, in the family Paramyxoviridae, encodes an unusually large phospho- (P) protein compared to other known paramyxoviruses. In this study, the region(s) involved in the interaction between this exceptionally large P protein with its nucleocapsid (N) protein was investigated in vivo using the yeast two-hybrid system. Deletion analysis was used to map the domain(s) of both the N and P proteins involved in N-P and P-N interactions. Mapping of the domains of N protein involved in its interaction with the P protein revealed that the Cterminal 30 amino acids (423-452 residues) are crucial for N-P interaction. However, mapping of the domains of P protein involved in the P-N association demonstrated that both the C-terminal 63 amino acids (470-532 residues) and the immediate N-terminal 62 amino acids (1-62 residues) simultaneously play a major role. Comparison of these findings with other studies indicates that paramyxoviruses are different in terms of interaction domains(s) between these two essential viral proteins involved in genome replication

Intraocular pressure in a clinical population: a retrospective study

A retrospective study was carried out to determine the distribution of intraocular pressure in normal patients who came for vision problems at the Optometry Clinic, Universiti Kebangsaan Malaysia (UKM) Kuala Lumpur Campus, and to determine the differences in intraocular pressure with respect to age, gender and race. The cohort consisted of 148 subjects divided into five groups with age ranged from 10 to 59 years. The inclusion criteria were, subjects had no sistemic or ocular disease, subjects were not taking any medication, visual acuity was 6/6 or better, refractive errors < ±6.00D, astigmatism < 2.00D, anisometropia <2.00D, and mean intraocular pressure measured using the X-PERT tonometer and taken between 9 am to 2 pm. Statistical analysis (ANOVA) showed the mean intraocular pressure without consideration for age, race or gender was 12.6 mmHg (SD ±2.5). There was no significant differences in intraocular pressure between right and left eyes, between different age groups and between different genders. However, the intraocular pressuse for the Chinese was found to be significantly higher than the Malays. It was found that the intraocular pressure of patients who came for vision problems at the Optometry Clinic UKM follows a normal distribution and there was no significant diference found between right and left eyes, between different age groups and genders. Race seemed to contribute to the differences in intraocular pressure

Tear stability, corneal staining and dry eye symptoms in contact lens wearers

The aim of this study was to examine tear stability of contact lens wearers (CLW) in young Malay adults aged 18 and above and to compare the results with non-contact lens wearers (NCLW). Corneal staining and McMonnies Dry Eye Questionnaires (MDEQ) scores between habitual soft CLW and NCLW were also compared. It also aimed to find correlation between tear stability and MDEQ scores. Quasi-experimental and case control study was conducted among 53 participants (53 right eyes) at UiTM Vision Care, UiTM Puncak Alam Campus. Twenty six participants were habitual soft CLW and twenty seven were NCLW. Tear stability was measured using non-invasive tear break-up time (NIBUT) and invasive tear break-up time (TBUT). Corneal staining was measured using Efron Grading Scale and dry eye symptoms evaluated using MDEQ. Mean scores of NIBUT and TBUT for CLW were 5.23 ± 7.3 sec and 2.19 ± 2.41 sec respectively; for NCLW were 8.71 ± 4.33 sec and 3.00 ± 1.69 sec respectively. There were significant differences in NIBUT (Mann-Whitney U, p = 0.0001) and TBUT (Mann-Whitney U, p = 0.001) between the CLW and NCLW. There was also significant difference in percentage of corneal staining found between the CLW (22.6%) and NCLW (7.5%), (Chi-square, p = 0.013). However no significant difference was found in MDEQ scores between the CLW (7.54 ± 3.62) and the NCLW (8.15 ± 3.38) group, (Mann-Whitney U, p = 0.42). There were also no correlations found between tear stability and MDEQ scores in the two groups. The results of this study showed NIBUT and TBUT values were significantly higher in NCLW than in CLW and corneal staining was more extensive in CLW. Contact lens practitioners need to be aware of changes in tear stability as results of contact lens wear and take the necessary action to improve on the management of their patients during aftercare consultation

The Implementation of Friendly Hand Hygiene Project in KAUH

Healthcare workers use their hands to treat, andprovide care to those in need, but sometimes those hands causeserious infections. Healthcare associated infections (HAIs) arethe fifth leading cause of death among hospitalized patients,which emphasizes the importance of effective preventativeimplementations. Evidence shows that hand hygiene is the bestmethod to prevent HAIs. This project utilizes an action methodby uses a multi-stage process starting from combining theliterature review themes, then identifying the idealrecommendations, then to filter the most appropriaterecommendations and implement into King Abdulaziz UniversityHospital (KAUH).The literature review discusses on work overload, role modeling,internal motivation and culture that influence compliance ratesfor health care workers (HCWs) and identifies the ideal solutionsand recommendations in order to increase the compliance rates,quality of care, patients’ safety and the organization as a whole.These recommendations were utilized in implementing thisproject, which includes reminder programs by visiting alldepartments in KAUH, innovation of a code among HCWs, andcarrying out an awareness campaign. Finally, a page was createdon Facebook to ensure that continuous awareness is deliveredand friendly reminders are spread constantly. In conclusion,using a friendly reminder project was found to be effective inhelping to increase the hand hygiene compliance rate amongHCWs

Hubungan Gaya Kognitif Siswa Dengan Kemampuan Pemecahan Masalah Matematika

This article discusses the relationship between students' cognitive style and mathematical problem-solving abilities in the number pattern material carried out at SMP Negeri 1 Botupingge in the odd semester of the 2021/2022 academic year. The research method used is a survey method with a correlational approach, with a questionnaire instrument to determine students' cognitive style and problem-solving tests to measure students' mathematical problem-solving abilities. The results showed that the correlation coefficient between students' cognitive styles and mathematical problem-solving abilities was 0.60, which means that there is a relationship between students' cognitive styles and mathematical problem-solving abilities at a high level. The coefficient of determination of 0.36 indicates that 36% of the contribution of cognitive style to the improvement of mathematical problem-solving abilities, and the remaining 64% is determined by other factors

The relationship between organisational culture and lifelong learning

The objectives of this study were to (1) establish whether a relationship exists between individuals’ perception of organisational culture, measured by the South African Cultural Instrument (2005) and lifelong learning, measured by the Dimensions of the Learning Organisation Questionnaire (2003); and (2) determine whether the participants differed with regard to these variables in terms of sociodemographic contextual factors such as age, race, gender, education, years of service, disability status and job level. A quantitative study, using primary data, was conducted on a convenient sample (N=257) of full-time public service officials in a South African public service organisation. Correlational and inferential statistical analyses revealed statistically significant positive relationships between individuals’ perception of organisational culture and lifelong learning. Significant differences were found in the perception of these variables for individuals with different years of service and for individuals of different age groups. The findings should contribute valuable knowledge to the field of organisational behaviour, which could be used to promote a lifelong learning culture in public service organisations. The study concludes with recommendations for future practiceIndustrial and Organisational PsychologyM. Com. (Industrial and Organisational Psychology

Soil and agricultural capability of UiTM Sarawak Campus farm, Malaysia

An area of 40.5 ha at UiTM Sarawak, Samarahan Campus farm was surveyed at a detailed level. There are three soil major groups, three soil families and six soil series identified in UiTM Sarawak, Samarahan campus. The three soil major groups are Red Yellow Podzolic (RYP), Gley and Organic. The three soil families are BEKENU and MERIT Family of RYP Group, BIJAT and TATAU Family of Gley Group and ANDERSON Family of Organic group. The soil series identified are Bekenu of BEKENU Family, Merit and Jakar of MERIT Family, Daro of BIJAT Family, Tatau of TATAU Family and Gadong of ANDERSON Family. The majority of the area is classified as having agriculture capability of Class 2t, 3te and 4te. Class 2t, 3te, 4te consist of Jakar, Merit and Bekenu series and which are restricted for agriculture due to the steepness of the slope. Class 3wi consists of Daro series soil where wetness and inundation hazard is a moderate limitation for agriculture use. Class 4fw consists of Tatau series soil which is not suitable for agriculture used due to serious fertility and serious wetness. Class 04go consists of Gadong series which is also not suitable for agricultural use due to high groundwater table and undecomposed organic surface layer

Responsive Design Approach in Modern Malaysian Administrative Building

AbstractThe main purpose of this paper is to elucidate on the study of state administrative building in Malaysia by describing the design built form and it adaptation towards the surrounding. Using multiple case study approach, Perdana Putra and Parliament Malaysia were chosen as prominent case studies with emphasis on form and space studies. Since this paper formulates new ways to describe on state administrative building design, it uses interpretive paradigm and semiotics as the methodological approach to study the relationship between building design and sustainable aspects. This paper is of value for practicing architects and society as it offers new insights by formulating design approaches in designing public architecture in Malaysia