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Mohd Shahrul Mohd Nadzir,Sawal Hamid Md Ali,Mohd Talib Latif,Soo Wei Khor,Haris Hafizal Abd Hamid,Utbah Rabuan,Zaki Khaslan 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
Clean air is one of the most fundamental principles of life quality and well-being. Outdoor and indoor air pollutions both can contributes to human health problems. Conventionally, the methodologies adapted to measure indoor air pollutants are based on: (i) passive samplers, which require long sampling periods and/or (ii) continuous sampling, which generally are bulky and expensive, generating noise and vibration, preventing its deployment in many places at the same time, leading to a limited spatiotemporal coverage. In recent years, low-cost air pollution technologies have gained increasing interest and, consequently, have been studied widely by the scientific community for air pollutions monitoring. Thus, it is important that these new sensing technologies provide reliable data, with good precision and accuracy. Electrochemical (EC) sensors from AiRBOXSense were constructed to measure CO, NO₂, and O₃. Results showed that the sensors behaved highly linearly in laboratory experiments and had response times of around 0.5-1.6 min. In this study, a simple equation was used to translate the signal to mixing ratio and was calibrated by adding a correction in order to achieve the minimum difference against the gas standard. We found that with the added corrections such as the new sensitivity and offset to the quation with most of the pollutants were r² = 0.8 (p ˂ 0.01), the difference values between mixing ratio of EC sensor and gas standard became decreased. Furthermore, this equation is deployed together with the other calibration model which constructed using the machine learning to translate signal to mixing ratios in the field experiment. Nevertheless, it should be noted that the representatives of measurements in this result only showed during the conditions of this campaign. Thus, the use of low-cost sensing technology to monitor indoor air pollutions is encouraged, but not waiving the relevance of high quality instruments (mainly reference instruments) as reference.
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The influence of biculturalism/integration attributes on ethnic food identity formation
Noriza Ishak,Mohd Salehuddin Mohd Zahari,Salim Abdul Talib,Hafiz Mohd Hanafiah 한국식품연구원 2019 Journal of Ethnic Foods Vol.6 No.-
This paper investigates the extent to which biculturalism/ integration attributes (food knowledge, food in media and food for social events) of the three primary races of Malaysia: Malays, Chinese and Indian foods influence the process of Malaysian food identity formation. The information for this study is obtained through surveys among the Malays, Chinese and Indian chefs/cooks who are working in the Malaysian food catering businesses. A total of 392 respondents were successfully interviewed. Through structural equation modelling (SEM), some useful insights were obtained. The result shows that biculturalism/integration attributes like knowledge on food, social events where various ethnic foods are a presence, and food media influence the food adaptation among ethnic groups and significantly contribute to the ethnic food identity formation. This promising indication undoubtedly is drawn several practical implications to relevant authoritative bodies, government agencies and catering operations.
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