This experimental study aimed to determine the effect of airflow velocity on the performance of a direct evaporative cooling system. Rectangular-shaped honeycomb cooling pads with a length of 34 cm, a width of 25 cm, and a thickness of 3.5 cm are used as cooling media. The main parameters of the study are low air velocity (2.3 ms−1), medium (3.2 ms−1), and high velocity (3.7 ms−1). The data collected include dry bulb temperature, wet bulb temperature, output air temperature, input and output air velocity, input and output humidity, and solar radiation. These data are used to determine saturation efficiency, cooling capacity, temperature decreases, and feasibility index. The experimental results are presented in the form of tables and graphs and analysed based on existing theories. The results showed that the evaporative cooling system could produce output temperatures up to 27.5°C with input 31.4°C at low airspeed, 27.97°C with input 31.47oC at medium speed, and 27.7°C with input 31.30°C at high air speed. It was concluded that a low airflow rate would add to the cooling efficiency, and the higher the airflow rate, the lower the cooling efficiency. The results showed that evaporative cooling is achievable with a feasibility index of 19.89 ≤ F*≤ 20.67. The results also affirmed that cooling capability is higher where the feasibility indexes are comparatively low.

This study aims to understand the general perspective of industrial company operating in Sabah, regarding the implementation selected tools of lean manufacturing. The objectives of this paper are to evaluate the implementation of lean manufacturing and its tools among manufacturing company located in Sabah. Apart from that, it will also identify the problem and factor in implementing lean manufacturing tool as well as the benefits experienced after the adoption of lean manufacturing tools. The scope covers manufacturing company of any types of industry that is actively operating in Sabah, regardless of size. Instrument of study is a survey questionnaire that contains open and closed ended questions, sent out to target respondents. Data analysis is done using descriptive statistics to explain the trends in dataset and Cronbach’s Alpha to test the internal reliability of the instrument. This study finds significant evident of the implementation of lean manufacturing and its tools among manufacturing companies in Sabah, as well as the problem faced in implementation, factors of implementation and benefits experienced after the adoption of lean manufacturing tools.

Heat Ventilation Air Conditioning System (HVAC) is designed to control the environment inside of residential, commercial or industrial buildings by controlling temperature of a room through heating and cooling. However, due to its mechanism, noise is produced in the system and reaches the people inside the building, thus causing distraction, discomfort and uneasiness. There are HVAC silencers in the market; however, the sound absorbing material used is of mineral wool types. In this study, the ducting silencer with the sound absorptive material that made of Arenga Pinnata, Kenaf and composition of these both materials were tested to identify its performance. The experiment was carried out in a testing apparatus that follows the ASTM E477-99 standard. Insertion loss was analysed at the end of the study. From the overall result and comparison, the insertion loss of Kenaf is averagely better than Arenga Pinnata, that is 97.5% higher than Arenga Pinnata. When composition of Arenga Pinnata and Kenaf is used, Kenaf plays important role in sound insertion loss, where when Kenaf composition increase, it increases the sound insertion loss capability.

This study aims to evaluate the awareness of implemented practices that already applied and the implementation of lean manufacturing practice of Total Quality Management (TQM) and Total Productive Maintenance (TPM) on Small Medium Enterprise (SME) companies in Sabah. Regarding the implementation of TQM and TPM practices of lean manufacturing, this study evaluates the awareness implementation of lean manufacturing practices TQM and TPM among manufacturing company located in Sabah before analyzing the respondent survey data. As to know better the awareness of TQM and TPM practices, a study of the awareness of lean manufacturing implemented practices was conducted which to identify the practices that already been implement and the pillars practices that highly and lowest implemented to the SME’s companies in term of TQM and TPM practices. The scope of this study has covered the manufacturing company of drinking manufacturing industry that is actively operating in Sabah, specifically on Small Medium Enterprise (SME) companies. The methodology used for the study was by survey questionnaire which contains open and closed ended questions, sent out to desired respondents. The outcomes of the analysed data were created using descriptive statistics by explaining the trends in dataset and Cronbach’s Alpha to test the internal reliability of the item. This study finds significant evident of the implementation of lean manufacturing and its practices among SME’s drinking manufacturing companies in Sabah, as well as the awareness implementation of lean manufacturing practices with a statistical value.

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