The purposes of this study were: 1. to study the inventory control system of S. Siriseang Company Limited 2. to study the causes and problems of differences between the real practical work and the company manual 3. to solve the problem of its inventory control system. The questionnaires were collected from 19 subjects relating to the inventory control system including purchasing storingaccounting and sales departments .The results showed that S. Siriseang Company Limited has 4 steps of the inventory control system consisting of Order. Products Return and Pickup. The problems of the inventory control system of S. Siriseang Company Limited are as follows; a lack of inventory data lack of purchasing planning and procurement a defective product categories issues out lack of staff and neglecting to perform the work according to the work manual. The solutions of the problems were 1. sheet items (Stock card) 2. the theory of ABC Analysis 3. the theory EOQ and 4. the process of inventory control system. The effective inventory control system should have the good management system and effective product categories for easy storage and use.

Current energy from sun made a significant contribution in the electricity manufacturing industry in Thailand. However the potential application of solar energy are at the low level. The agency will need to make solar energy perpendicular to the sun as much as possible. Therefore the invention of the light experimental set for two-axis motion to identify the vertical axis was done to compare the value of Light Dependent Resistor to locate the origin of the light and can be applied to the real work in the future.

This paper presents a low cost wireless sensor network system which is developed to be an alerting system for relatives or caregivers when the elder is immobile for a long period. The alerting signal is sent via the Internet link and a mobile phone. Remote transducers capture input signal from the mobility subject. If the target subject has immobilized behavior for long period which is analyzed abnormal condition the system will send the alerting messages to a selected mobile phone or Internet link. After detection of motionless elder from the set–point periods the system immediately distributes messages via SMS on the mobile network and a server to warn a relative or a caregiver with the image option to send. The sensor modules have ease-ofinstallation with coverage area nearly 3 square meters 80 % of detection level suitable for a small room and a bathroom