Indoor air quality (IAQ) in educational institutions: a review on risks of poor IAQ, sampling strategies, and building-related health symptoms

Health and academic achievement of students from every level of education are affected by the provision of good Indoor Air Quality (IAQ) since the students spend more than 5 hours of a day in school on average. Hence, this paper discusses on issues related to IAQ studies in maintaining a healthy level in educational institution. The presence of indoor pollutants such as VOCs, CO2, and other hazardous elements were assessed in terms of its effects on students’ well-being and health. This paper also examines commonly reported health problems related to poor IAQ such as sick building syndrome (SBS) and asthma. Every measurements and consideration regarding IAQ provision comes with different techniques and strategies, which were highlighted regarding its relative importance and frequency of use by different researchers. The review suggested substitution of natural-based products for indoor cleaning agents and installation of air ventilation and purification systems for a more acceptable indoor air quality

Infected Enterprise : Printing Design / Isma Nur Hafizan ...[et al.]

As for the business, we are providing a high quality of printing t-shirt design for the Malaysian. As we go thru with the changes of environment, people nowadays put unique but simple design t-shirt on their own clothes. So, based on our surveying, we conclude that we are going to provide the Malaysia with the simple and unique design t-shirt, that are well in high product's quality. Business plan is necessary to all entrepreneurs. It is prepared to a group of people which are owners itself, bankers, suppliers, customers and employees. This plan include in Business Plan chapter which is consists of marketing, operation, organization and financial plan. We are also believe that we will be able to achieve our business goal with our business financial position statement. We will get our return initial capital within short-time and our current ratio will cover our liabilities and put our business in comfort stage

Development of a lock biometric authentication system for a battery powered locking device

This paper describes the development of a biometric authentication system in a battery-powered locking device. It differs from the conventional locking system, which connected to an external power supply. The system focuses on a fingerprint-based identification with single button operation. A fingerprint sensor readily available in the market was integrated with an Arduino as the processing unit to unify the button operation as means to trigger functions on the fingerprint sensor and actuator motors, as well as indicating lights for user feedback. The aim of the seamless fingerprint authentication requires a brief matching of users’ fingerprints. A prototype of the system was built and tested. It was found that the device is able to match a fingerprint in less than 1s for up to 50 registered fingerprints. Using a nominal battery capacity of the 12V lithium battery pack with 5000mAh, the amount of current supply to the actuator is sufficient for 400 activations