The aim of this research was to study the status in using information technology in education of level 3-4 teachers in schools of the Office of Bangkok Education region 3 academic year 2004. The sample were 362 teachers. The instrument used in this research was the questionnaire. The data were analyzed by Percentage frequency means standard Deviation and analysis of variance. The results of this research were as the following: the status in using Information technology in education in all seven dimensions: CAI distance learning internet education network classroom laboratory and software application of teachers was at the medium level.

In this paper a CPW-fed slot antenna for wideband application was designed and simulated. In order to examine the performances of this antenna a prototype was designed at frequency 2.4 GHz and simulated with various width of slot antenna in both sides for input impedances matching and simulated by IE3D software package of Zeland. The simulation result of bandwidth is 1.65 GHz (2.1{3.75 GHz) which covers the standard frequency of IEEE 802.11 b/g (2.4{2.4835 GHz) and Wimax (2.3{3.6 GHz). With these performances the proposed antenna can be used in wideband applications.

Now a day the mostly air condition are use vapor compression refrigeration system in which R-22 refrigerant is used as a working substance. From the results of study it found that the quantity of water vapor or moisture in the air is condensed with in the fan coil unit while through out the evaporator. The fluid after condense is called condensed water. By this process the quantity of condensed water is increases when the air condition is used in the long time. To increase the utility the condensed water is recovered for the heart reduction in the finned-tube condenser. The experiment is consist of two conditions by using the air and condensed water to heart reduction. But in case of condensed water the pressure operation is controlled at 280 and 260 Psig respectively. The results of experiment shown the refrigeration effect coefficient of performance (C.O.P) and energy efficiency ratio (EER) is 39675 Btu/hr 3.01 and 10.3 Btu/hr.Watt respectively with the air is used. At the pressure operation 280 Psig refrigeration effect (C.O.P) and (EER) is 44212 Btu/hr 3.38 and 11.5 Btu/hr.Watt respectively and 49856 Btu/hr 3.99 and 13.6 Btu/hr.Watt at pressure operation 260 Psig. Furthermore the capacity of condenser is increases to 11.43% and 25.6% and also the refrigerant efficient is increases to 12.43% and 32.43% at the pressure operation 280 and 260 Psig. Thus the parameter of the energy efficiency ratio depends on the capacity of condenser working substance temperature (pressure operation) and air surrounding temperature.

This paper presents a study of the strength porosity and corrosion resistance of mortars made with ternary blends of ordinary Portland cement (OPC) ground rice husk ash (RHA) and classified fly ash (fine fly ash FA). Compressive strength porosity and accelerated corrosion with impressed voltage (ACTIV) were tested. The results show that the use of ternary blend of OPC RHA and FA produces mortars with improved strengths at the low replacement level with RHA and FA and at the later age in comparison to that of OPC mortar. The porosity of mortar containing pozzolan reduces with the low replacement level of up to 20% of pozzolan but increases with the 40% replacement level. The chloride induced corrosion resistance of mortar as measured by ACTIV is however significantly improved with the use of both single pozzolan and the ternary blend OPC RHA and FA. The corrosion resistance of ternary blend mortar is higher than that of mortar containing single pozzolan. The use of ternary blend OPC RHA and FA is very effective in enhancing chloride induced corrosion of mortar.

At present business globalization is highly competitive and so is hotel business administration. Therefore to maintain effectiveness and growth in hotel business administration appropriate strategies must be implemented especially in human resource management in order to enhance the personnel to effectively work up to their potentials. Knowledge management or KM is considered one of the best strategies to be introduced in hotel business administration. Conceptually stated KM aims at extracting tacit knowledge by using knowledge skill attitude and experience from the human resource in operation to create the viable learning organization in hotel business.