จำนวน Repository ( 3611 )
การศึกษาพฤติกรรมค่าการนำความร้อนแบบไม่เชิงเส้นของวัสดุความเสียดทาน
Nowadays one of the automotive engineering is conductivity of brake pads playing a role in friction coefficient which means safety of customer. Thus thermal properties have been improved using composited materials. This project aims to study the conductivity behavior of 3 different brake pads which are supported by the company Compact International (1994) Ltd. For experimental works temperature based on brake condition was simulated from 200 to 400°C and cooled down from 400 to 200°C at 1 5 and 8 MPa of pressure respectively. By standard JIS D4413 testing condition of pressure was referred. The non-linear of conductivity value are calculated from the temperature under steady state condition. As a result of testing there are several of parameters effecting on the non-linear conductivity value. The brake pad that is a mix of high-fiber affects the fluctuation of thermal conductivity. At the same time lubricant in the brake pad cause the stability of conductivity value in different temperature range at the same pressure. On the other hand the brake pad mixed hi-copper inspires the narrow range of conductivity value in different pressures at the same temperature. Moreover the conductivity value as a mention is inversely proportion with the coefficient of kinetic friction.
อาร์ตบุ๊คไทยแฟนตาซี
This special project aimed to develop art book Thai fantasy and evaluate the satisfaction of viewers to art books Thai fantasy. The data collected from 50 people who was interest Thai arts and Thai cultural. The statistic to analyze was frequency percentage mean and standard deviation. The results showed that the target group was satisfied with the art of Thai fantasy at the highest level. (𝒙̅=4.54 S.D.=0.50)
บรรยากาศองค์กร แรงจูงใจในการทำงาน และความมีประสิทธิภาพในการปฏิบัติงานของบุคลากร
The purposes of this research were to study organizationaL climate work motivation and work efficiency of employee at Rajamangala Universit of Technology Phra Nakhon. This is a quantitative research which samples were collected from 304 Rajamangala University of Technology Phra Nakhon employees by using proportional stratified random sampling. Data were collected through questionnaire and analyzed by frequency percentage mean standard deviation Pearson Product Moment Correlation Coefficient and multiple regression analysis. Results of this study found that : 1) organizational climate work motivation and work efficiency of Rajamangala University of Technology Phra Nakhon employees is in the high level in overall image and in individual aspect; 2) four aspects of organizational climate including the attachment and faith aspect the organization structure aspect the acceptance aspect and the work standard aspect.had an effect on work efficiency of employees at Rajamangala University of Technology Phra Nakhon. These factors couldexplain 41% of variance to work efficiency; and 3) Two factors of work motivations affected work efficiency of employees at Rajamangala University of Technology Phra Nakhon. These two factors could predict 57% of variance to work efficiency. Keywords: Organizational Climate Work Motivation Work Efficiency
การพัฒนาเถ้าแกลบและเถ้าถ่านหินเพื่อใช้แทนที่ปูนซีเมนต์ปอร์ตแลนด์ในงานคอนกรีตกำลังสูง
This research presents a study of the use of classified fly ash and ground rice husk ash as a pozzolanic material in producing high-strength concrete. Portland cement (CT) is partially replaced with classified fly ash and ground rice husk ash by weight of the cementitious materials. Compressive strength porosity and chloride penetration were investigated. The results show that the compressive strength resistance to chloride and low porosity of high-strength concrete improves substantially with partial replacement of Portland cement with fly ash and rice husk ash.
การพัฒนาสื่อมัลติมีเดีย เรื่องการเย็บตะเข็บผ้าพื้นฐานวิชาการงานอาชีพ สำหรับนักเรียนชั้นมัธยมศึกษาปีที่ 1 โรงเรียนสาธิตมหาวิทยาลัยศรีนครินทรวิโรฒ ประสานมิตร (ฝ่ายมัธยม)
The purpose of this research was to: 1) use Multimedia Development to instruct Secondary 1 students learning Basic Sewing in Home Economics subject 2) compare academic achievement of students taught with the multimedia instruction and students taught with the conventional method and 3) study student satisfaction of the Multimedia Development technique Basic Sewing in Home Economics subject. A sample of 60 secondary 1 students attending Sinakharinwirot University Prasanmit Demonstration School was chosen using Cluster Random Sampling and were classified into 2 groups of 30 students; the first being the experimental group instructed with the Multimedia Development technique and the second being the control group instructed with conventional methods. The instruments of this research include lesson plans multimedia an evaluation form to track the multimedia efficiency a practice evaluation form and a questionnaire surveying student satisfaction. The statistics used for the data analysis were percentages mean standard deviation and a t-test. The results were as follows: 1) using Multimedia Development to instruct Secondary 1 students learning Basic Sewing in Home Economics subject achieved the efficiency of 82.14/80.06 2) the students taught with the multimedia technique have greater after learning achievement than those taught with the conventional method; statistical significance was at the .05 level and 3) the student satisfaction of the Multimedia Development technique Basic Sewing in Home Economics subject in high level is (x̅ = 4.42S.D. = 0.54)