The purposes of this research were to study sexual risk behavior among adolescent and to explore factors affecting sexual risk behavior among adolescent with early sexual intercourse. Research sample was 396 Mathayom Suksa 1 students (lower-secondary students) in secondary schools under the Jurisdiction of the Office of Basic Education Commission Bangkok which was obtained by multi-stage sampling. Data were collected by questionnaire. Data were analyzed by frequency percentage mean standard deviation independent t-test One Way ANOVA Multiple Comparison and Pearson Product Moment Correlation Coefficientsoftware.The result of the study on sexual risk behavior among adolescent with early sexual intercourse was found at the low level. For the factors affecting sexual risk behavior among adolescent with early sexual intercourse they were found that the personal factor including gender parents marital status family type family accommodation and self-sexual acquisition influenced sexual risk behavior among adolescent with early sexual intercourse at the low level. The attitude factor including they were found that the personal factor including sexual values and attitudes toward opposite sex influenced the sexual risk behavior at the high level. The family factor including family raising family sexual communication and supporting of the association of the opposite sex influenced sexual risk behavior among adolescent with early sexual intercourse at the low level. The social factor including friends were found the low-level sexual risk behavior while low-level sexual knowledge acquisition from schools influenced the high-level of sexual risk behavior and sexual content in the media influenced the moderate-levelsexual risk behavior.For the research hypothesis results of the comparison of the personal factor and the social factor toward sexual risk behavior among adolescent with early sexual intercourse it was found that the there was significantly difference forthe personal factor including gender family accommodation and self-sexual acquisition. However there were not significantly different for the parents’ marital status and family type. There was significantly difference for the family factor including family raising family sexual communication and supporting of the association of the opposite sex.The result of the difference between the personal factor and the social factor toward sexual risk behavior among adolescent with early sexual intercourse was found that there was significantly difference for the personal factor including gender family accommodation and self-sexual acquisition. The result of the difference between the attitude factorand the social factor toward sexual risk behavior among adolescent with early sexual intercourse was found that the attitude factor including sex value and attitude toward opposite sex had negative correlation with sexual risk behavior among adolescent with early sexual intercourse at statistical significance. The social factor including friend and sexual content in the media had positive correlation with sexual risk behavior among adolescent with early sexual intercourse at statistical significance. While sexual knowledge acquisition from school did not have the correlation.

This research aims to develop a web-based instruction (WBI) applied in the computer technology course. The proposed WBI composed of the following components: lessons of the computer technology course pre-test and post-test exam: determining the effectiveness of the proposed work and user satisfaction questionnaires. It is also evaluated a study achievement and a usage satisfaction by using efficiency and effectiveness test of lessons and satisfaction test of users. In this work users are the second year students in major of Computer Technology Faculty of Science and Technology Rajamangala University of Technology PhraNakhon for 30 students. For experiments the results show that its efficiency is 80.13/83.67 which are met studied the proposed WBI are also higher than students who studied with ordinary courses at the statistical significant level 0.05 furthermore an average of students’ satisfactions score is 4.20 which determines students satisfy with the proposed WBI at a high-level. Finally it can be concluded that the proposed WBI is effective

The objective of the research was to develop multimedia instruction package on Optical Communication to improve cognitive skills of Thai Qualification Framework for Higher Education (TQF: HEd). The research tools consisted of the teaching documents power-point presentation the experimental set of Optical Communication and the simulation tool of fiber optic analysis. The tools were firstly observed by five experts and evaluated by 18 student sample group who registered in Optical Communication subject in Industrial Education Program of Rajamangala University of Technology Phra Nakhon. The research results showed that 1) the multimedia instruction package for Optical Communication was in a high level (X ̅=4.46S.D.=0.60) and 2) after learning students’ satisfactions were in a high level (X ̅=4.46S.D.=0.50). In conclusion the multimedia instruction package on Optical Communication to cultivate cognitive skills of TQF: HEd can be used effectively for learning and teaching on Optical Communication.

The purposes of this study were to investigate the level of motivational factors of personnel working at the central administrative office of Rural Roads Department and compare their motivation on working. The research samples were 163 personnel working at the central administrative office of Rural Roads Department during January 2015. The data were analyzed by the frequency distribution percentage distribution mean (-μ) standard deviation using a computer software program to analyze the data collected from the questionnaire. The analysis of the study on motivational factors of personnel working at the central administrative office of Rural Roads Department revealed that most respondents were females (84.70%) with the age range between 31 and 40 years old. 75 persons (46.00%) held bachelor degrees while 124 persons (76.10%) had been working for five to ten years. 69 persons (42.30 %) were working in the level 2 to 7 and 82 persons (50.30%) earned 10001-20000 Baht per month 109 persons (66.90). The employees working at the central administrative office of Rural Roads Department had an average level of opinions towards motivational factors. When looking into each aspect it was found that work accomplishment work features acceptance and respect responsibilities and organizational expansion were relatively at high levels. Only work progress had an average level. Future studies should focus more on supportive factors concerning to work in order to obtain knowledge about the employees’ needs and satisfaction towards their workplace.

การวิจัยนี้เป็นการศึกษาพฤติกรรมการอบชุบด้วยกระบวนการทางความร้อนของโลหะเงิน เจือต่ำ58.45wt%Ag +41.55wt%Cu โดยทำการเปรียบเทียบกับสมบัติของโลหะเงินสเตอร์ลิง 925 และโลหะเงินเจือต่ำ 58.33% เพื่อศึกษาสภาวะที่เหมาะในหาการปรับปรุงคุณสมบัติเชิงกลและโครงสร้าง จุลภาคของโลหะเงินเจือต่ำที่เป็นไปตามมาตรฐานผลิตเครื่องประดับ ผลจากการศึกษาโลหะเงิน 58.33 % ที่อัตราส่วนผสม 58.33Ag+36.66Cu+5.01Sn ซึ่งมี ค่าคุณสมบัติเชิงกลจากการทดสอบเบื้องต้นมีค่าเหมาะสมที่สุด จากนั้นท่าการศึกษาค่าความแข็งแรงดึง สูงสุดแบบเส้นลวดพบว่ามีค่าความต้านทานแรงดึงสูงสุดเท่ากับ 0.36 MPa ค่าเปอร์เซ็นต์การยืดตัว 0.11% เมื่อท่าการอบที่อุณหภูมิ 650 °C เวลาในการอบ 10 นาที ซึ่งปล่อยให้ชิ้นงานเย็นตัวในอากาศที่ อุณหภูมิห้องปกติ และค่าความแข็งจากการทดสอบมีค่าสูงสุดเท่ากับ 105.12 HV อบที่อุณหภูมิ 600 °C เวลาในการอบ 10 นาที ซึ่งปล่อยให้ชิ้นงานเย็นตัวในอากาศที่อุณหภูมิห้องปกติ ศึกษาโครงสร้างจุลภาค ของโลหะเงินเจือต่ำ 58.33Ag+41.57Cu+0.10Sn เมื่อท่าการอบปรับปรุงคุณสมบัติทางความร้อนและการ ชุบแข็งแบต่างๆ พบว่าโครงสร้างจุลภาคของชิ้นงานทดสอบหลังปล่อยให้เย็นตัวในอากาศ เกิดการ เปลี่ยนแปลงจาก β phase ที่มีขนาดเล็กลงเป็นโครงสร้าง Eutectic phase ที่มี α -phase และ β - phase ขนาดเล็กและละเอียด ซึ่งมีลักษณะสอดคล้องกับโครงสร้างจุลภาคของเฟสไดอะแกรมสมดุลโลหะ เงิน-ทองแดง ผลจากการทดลองและวิเคราะห์หาค่าคุณสมบัติเชิงกลของชิ้นงานทดสอบและโครงสร้างจุลภาค ที่ได้จากการทดลองในสภาวะต่างๆ มีค่าที่เป็นไปตามมาตรฐานของเครื่องประดับเงินตามมาตรฐาน อุตสาหกรรมการผลิตเครื่องประดับ ทั้งของในประเทศและต่างประเทศ