Journals of Universiti Kuala Lumpur
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EVALUATING THE PERFORMANCE OF ENVIRONMENTALLY FRIENDLY AND MINERAL OILFREE CUTTING FLUIDS: A COMPARISON OF FULLY SYNTHETIC, SEMI-SYNTHETIC AND HEAVY-DUTY EMULSIONS
Full text linkThe paper aims to determine the relative lubricity environmentally friendly of the Fully Synthetic (FS) Cutting Fluids (CF) group and a bio-based emulsion and compare technical performance to Semi-Synthetic (SS) and Heavy-Duty Emulsions (HDE) groups. In the final section of the paper, the environmental impacts of the three CF groups are discussed and the method of calculation is described to compute their (GHG) emissions using a case study. The experiments were performed using a precision CNC machine by incorporating a rotating dynamometer attached to the rotating spindle to enable direct measurement of torque and thrust force exerted by the tap at low spindle speed to machine aerospace engine components in Titanium alloy (Ti-6AL-4V) under simulated field performance conditions. The paper describes insights into the factors affecting process variability covering the tool, material, preparation, and environmental factors, and ranks their effects. It also demonstrates the impact of GHG on the environment which can be reduced by using bio-based Metal Working Fluids (MWFs) rather than mineral-based. In total eight different CFs (two of the CF Heavy Duty Emulsion (HDE) , two Synthetic, two Semi-Synthetic and two non-mineral oil ) were compared and analysed against a known industry benchmark(BM). The initial findings in this paper, although focused on freshly mixed CFs products, suggest the non-mineral oil product can perform equally well or some cases even better
A CRITICAL ANALYSIS OF ISO/IEC 17025 PRACTICES AT UNIKL MITEC LABORATORY TOWARDS IMPROVEMENT OPPORTUNITIES
Full text linkThis research critically examines UniKL MITEC laboratories\u27 compliance with ISO/IEC 17025:2017 accreditation standards. The laboratories have not achieved full accreditation for an extended period, necessitating a comprehensive assessment of their practices. A qualitative and quantitative approach involving interviews, observations, and gap analysis was employed. The self-assessment checklist, designed by the researcher, measured the laboratory\u27s readiness for accreditation certification. Descriptive statistics revealed that the laboratory\u27s compliance with clause 8, focusing on management requirements, is currently at a modest 40%. This signifies a significant gap between their current practices and the minimum compliance level. The study further assessed specific clauses within clause 8, ranging from 8.1 to 8.9, revealing that the least compliance observed was at 37.5%, while the highest was only 42.5%. A Pareto analysis highlighted that clause 8.2 and 8.5 are the major contributors to non-compliance, accounting for over 30% of the cumulative gap percentage. Notably, clause 8.2 exhibited the most significant gap, with 59 individual gap levels identified. The research delves into a detailed cause-and-effect analysis, investigating the root causes of noncompliance within the laboratory\u27s current practices concerning clause 8. Proposed improvements align with management concepts and ISO/IEC 17025 standards. In essence, this research serves as a valuable contribution to enhancing laboratory practices, ensuring alignment with international standards, and identifying opportunities for improvement in management requirements
QUALITY IMPROVEMENT ON PIPE DEFECTS AT WELDING ERECTION PROCESS
Full text linkThe project was carried out at Aldats (Malaysia) Sdn. Bhd., located in Bandar Baru Seri Alam, Masai Johor. Aldats (Malaysia) Sdn. Bhd. offered three main services which are Engineering and Construction, Manpower Supply and Trading. Current pipe defect at engineering and construction services is 40% which in September 2022. The aim of this project is to reduce pipe defect at welding erection process by at least 20%. After the quality improvement by implement DMAIC, the result shows a decreasing to 27% in December 2022
THE EXPERIMENT OF PERMEABILITY OF PLASTIC WRAP TO WATER VAPOR (EVAPORATION): TAGUCHI METHODS APPROACH
Full text linkPlastic wrap, cling film, saran wrap, cling wrap, glad wrap or food wrap is a thin plastic film typically used for sealing food items in containers to keep them fresh over a longer period of time. Plastic wrap, typically sold on rolls in boxes with a cutting edge, clings to many smooth surfaces and can thus remain tight over the opening of a container without adhesive. However, different types of plastic wrap are already on the market, making it difficult for consumers to choose the best option. Therefore, this experiment was designed to evaluate the permeability of the polymer using various types of plastic wrap to prevent evaporation and, indirectly, to study and understand about the factors that can affect plastic wrap evaporation during the permeability of plastic wrap. This experiment assists users in determining which plastic wrap to use using Taguchi Methods approach
A SURVEY OF DRUG DISPENSING IN PRIVATE PHARMACIES OF BENGHAZI, LIBYA; A CROSSSECTIONAL STUDY
Full text linkThis cross-sectional survey studies the patterns of drug dispensing, identifies the extent of drug dispensing without a prescription, studies the methods, times, and improper refilling of prescriptions at pharmacies in the city of Benghazi,Libya, and whenever possible, study how close the obtained results are from the available published. A random sample of 16 private pharmacies located in different areas of Benghazi was chosen, and data was collected at each pharmacy for one week from 4 pm to 8 pm the study lasted one month, the study sample was 1210 subjects. A drug dispensing questionnaire form was designed and filled out. The obtained forms were analysed to study the pattern of drug dispensing in Benghazi. The percentage of dispensing drugs with a prescription, and without a prescription was computed for the respondents, medications were dispensed with a prescription for (49%) of the respondents, while (51%) of medication dispensing occurred without a prescription. In conclusion this study reveals an extensive supply of medicines, both prescription and nonprescription, in the city of Benghazi and that Libya does not follow official regulations for controlling drug dispensing. Educational and managerial interventions should restrict inappropriate dispensing, improving the dispenser’s knowledge, professional behavior, and attitud
INVESTIGATION OF NOISE LEVELS AND RISK MANAGEMENT IN THE MACHINERY WORKSHOP AT UITM BUKIT BESI
Full text linkA noise inspection was conducted at the Machinery Workshop of UiTM Bukit Besi to evaluate noise levels and associated health risks. The study identified various noise sources and categorized them into four zones: above 115 decibel(A), 86-114 decibel(A), 82-85 decibel(A), and below 82 decibel(A). Noise measurements were taken using sound level meter applications and mapping techniques. Results showed some machines, particularly the Metal Lathe Machine and Hydraulic Shearing Machine, produced noise levels exceeding 85 decibel(A), posing significant risks of hearing damage. The inspection followed guidelines from the Occupational Safety and Health (Noise Exposure) Regulations 2019. Recommendations included implementing a hierarchy of control measures such as engineering controls, administrative controls, and personal protective equipment. The study highlighted the need for regular noise monitoring, employee education, and clearly marked hearing protection zones to mitigate noiserelated health risks in the workshop. This assessment establishes baseline measurements for ongoing monitoring of noise levels and effectiveness of control measures in protecting worker health and safety in the machinery workshoporatory setting
OPERATIONAL IMPACTS OF ENGINE REMOVAL AND REPLACEMENT ON KEY PERFORMANCE INDICATORS IN AL-31FP ENGINES OF THE SUKHOI SU-30MKM
Full text linkThe Sukhoi Su-30MKM, a high-performance fighter jet utilized by the Royal Malaysian Air Force (RMAF), relies on two AL-31FP engines for its mission-critical operations. One of the primary threats to these engines during flight is bird strikes, which can inflict severe damage on key components such as the rotor blades, leading to engine deficiencies or, in some cases, complete failure. This study documents the systematic process of removing and installing an AL-31FP engine after a bird strike compromised its performance. The engine replacement was executed in full compliance with the Aircraft Maintenance Manual (AMM) and RMAF protocols, ensuring procedural accuracy, safety, and efficiency. The process encompassed several key phases: preparation, tool selection, damage assessment via endoscopy, and post-replacement performance testing. Three key performance indicators were monitored: lowpressure rotor speed (N1), high-pressure rotor speed (N2), and maximum vibration level (VIBmax). Post-installation performance data showed a marked improvement in key engine parameters, with N1 increasing from 76.4% to 92.5%, and N2 from 79% to 92%, both now operating within the designated tolerance limits. Additionally, VIBmax decreased significantly from 70.21 mm/sec to 30.12 mm/sec, well within the acceptable safety threshold of 50 mm/sec. This study, focused on training mode, highlights the importance of structured maintenance practices and precise parameter monitoring in restoring engine functionality and ensuring operational readiness, providing valuable insights for aviation maintenance in military contexts
A CASE STUDY OF RADIOACTIVE CONTAMINATION IN OIL PONDS AND ITS ENVIRONMENTAL RISKS
Full text linkThis paper tried to highlight one of the most important sources of the environments pollutions which is produced water. Produced water always contains impurities and if present in sufficient concentrations,these impurities can adversely impact the environment. This work aims to study the level of radiation exposure generated from oil ponds for WAHA field as a case study and assessing the health risks for employers of the oil fields. Furthermore, evaluating the environmental impact of the local areas and the population growth is another approach. There is a lack of studies in this field and the interest in addressing the environmental impact, especially the densely populated areas. This will establish a baseline map of radioactive elements concentration levels in Libyan sites as well as determine radioactivity criteria and assessing of the dose and health risk resulting from radioactivity. This study shows the seriousness of these radiations from the refining and production of oil companies to neighboring cities and could serve as important radiometric baseline data upon which future epidemiological studies and environmental monitoring initiatives
ROLE OF FRESH CARROT JUICE AGAINST CISPLATIN TOXICITY ON SPLEEN AND SOME BLOOD PARAMETERS IN RABBITS
Full text linkThe current research targeted to study the role of the juice of the carrot against cisplatin toxicity in the spleen of male rabbits by using a single injection of cisplatin in an intraperitoneal of 5 mg/kg. The parameter counts of WBCs, PLT, LYM, MID, and GRA and the level of C3 complement protein were measured. The result showed changes in the hematological parameters in the group of CP treated and the group of CP treated with oral fresh carrot juice paralleled to the control group. WBCs and PLT count in serum samples show an important P- value < 0.05 decrease in the serum of rabbits treated with cisplatin paralleled to the negative control group. Moreover, there were decreases in LYM and MID counts but non-significant in the serum rabbits treated with CP paralleled to the group of negative control. However, the GRA count and level of C3 complement were increased in the serum rabbits treated with CP paralleled to the control negative group. After rabbits received an oral dose of fresh carrot juice 5ml/kg for the following 4 days before cisplatin injection, 3 following days after cisplatin injection, the level of C3 complement and counts of GRA were reduced in the group of CP-treated with oral fresh carrot juice, and succeeded in restoring the level of C3, count of GRA to the same range to the negative control. Moreover, the count of LYM slightly increased compared to the group of CP treated but not in the same range as the negative control. However, other parameters show no effect of the fresh carrot juice treatment.
Furthermore, for histopathological investigation, the spleen from all groups was collected. Histological observations of spleen show that fresh carrot juice has the role reduced the toxicity of cisplatin by reduce the effect of cisplatin in the tissues which reduce number of the white cells in red and with pulp. This study demonstrated that fresh carrot juice has a role as a potential therapeutic against (CP) toxicity in the immunity of rabbits
LOGISTICS TRANSFORMATION IN INDONESIA FOR THE E-COMMERCE MARKETINDUSTRY
Full text linkLogistics in e-commerce is essential for efficient product delivery. Still, it faces challenges such as high shipping costs, inconsistent human resource performance, lack of transparency, and the need for improved efficiency. This thesis explores these challenges and strategies to enhance ecommerce supply chain efficiency. The study examines factors affecting e-commerce logistics performance, including shipping costs, service quality, and technological advancements, by reviewing relevant literature. Using case studies, surveys, and qualitative analysis, the research identifies effective strategies for improving logistics efficiency. Key findings highlight the benefits of focusing on the final delivery stage, adopting Forward Fulfilment, choosing appropriate thirdparty logistics (3PL) providers, and fostering industry collaboration. Specifically, Forward Fulfilment optimizes human resources by 20%, improves warehouse cost efficiency by 78%, and reduces shipping costs by 65% to Surabaya and 80% to Medan. These insights offer practical guidance for e-commerce companies and logistics providers to enhance performance and thrive in a competitive market