จำนวน Repository ( 816 )

แผ่นเกราะโลหะกันกระสุน
แผ่นเกราะโลหะกันกระสุน

This research project aimed to analyze and design the pattern of a bulletproof metal armor plate as well as build a bulletproof metal armor plate for a small armored regular truck. The methodology consisted of the NIJ standard test and the finite element analysis. The bulletproof plates created were tested for a real firing. Their firing results were compared with those of NIJ-standard using a finite element program in this case applying with the program Ansys/Explicit Dynamic. SolidWorks program is employed as a tool to design and create 3D models of armor plates and bullets. The materials taken in the finite element simulation were SKD11 and SUS304 and the parameters utilized in the research were material types hardness values spacing between the plates and thickness. In the case of two armor plates stacked SKD11 material was designed for the first armor plate to be hit by the bullet. It served to destroy bullets. In addition the second armor plate made of SUS304 material served to absorb energy and obstruct the movement of bullets. For testing a 30-06 caliber M2 AP 166 Gr bullet was selected at a 0-degree angle and the velocities measured and set by the Ansys/Explicit Dynamic program were 901.7 m/s and 880 m/s respectively. The front plate made of SKD11 material with a thickness of 10 mm and the back plate made of SUS304 material with a thickness of 10 mm were fired 1 shot. The results showed that the bullet could penetrate the front armor plate but not penetrate the back-armor plate. In the NIJ 3 standard tests the shooting with a 7.62x51 mm NATO FMJ 148 Gr shell at a 0-degree angle for 5 times with velocities equal to 846.4 841.3 839.1 838.2 and 845.3 m/s was performed on the stacking front and back armor plates both made of SUS304 material with a thickness of 8 mm. The bullet velocity simulated by the Ansys program was 847 m/s resulting in the front plate having a bullet penetration and a slight bulge on the back plate. From the finite element simulation results and the actual test results it was found that the damage to the armor plates detected by both methods was consistent. Therefore the finite element program was selected to simulate the damage of armor plates resistant to penetration according to the NIJ standard Level 4. The results of the research could be concluded that the use of armor plates stacked with suitable different materials in multiple layers would affect the penetration resistance. Increased thickness and optimal spacing between the armor plates were important parameters in penetration resistance. Moreover it revealed that the higher the material hardness the better its ability to resist penetration. In particular this suggestion should be applied to the first armor plate or front armor plate.

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อิทธิพลของสภาวะการผลิตและการเก็บรักษาต่อสมบัติทางเคมีกายภาพของพริกป่นและพริกป่นคั่ว
อิทธิพลของสภาวะการผลิตและการเก็บรักษาต่อสมบัติทางเคมีกายภาพของพริกป่นและพริกป่นคั่ว

Development of chili powder products through consumer survey to be used as the information for the development of high quality chili powder. The quality and physicochemical properties of chili powder during storage were investigated. The sound and red pods of fresh chili were washed and blanched at 100ºC for 3 min. Blanched chili pods were soaked in 0.25% sodium metabisulfite with 1.0% citric acid for 30 min prior to drying in a tray dryer at 65°C for 14 h to obtain dried chili with a final moisture content of approximately 8%. Dried chili pods without stem were ground to obtain chili powder. Roasting before grinding resulted in the reduction of moisture aw and color values. The results of study on the quality changes of chili powder during storage showed that storage temperature was the important factor affecting the changes in physicochemical properties and percentage of consumer acceptance. Meanwhile aluminum foil packaging slowed the increase of aflatoxin content in chili powder better than polypropylene. However aerobic bacterial count of the developed chili powder product is very low compared to the microbiological specifications while yeast and mold were not detected. The product contains a standard level of aflatoxin content after 12 weeks in all storage conditions which corresponds to the awareness of consumers in terms of quality cleanliness and safety are important factors in deciding to buy chili products.

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การวิจัยและพัฒนาสมุนไพรกลุ่มต้านเชื้อแบคทีเรีย ทําผลิตภัณฑ์ทําความสะอาดในครัวเรือน เพื่อสุขภาวะที่ดี และมีความปลอดภัยต่อผู้บริโภค
การวิจัยและพัฒนาสมุนไพรกลุ่มต้านเชื้อแบคทีเรีย ทําผลิตภัณฑ์ทําความสะอาดในครัวเรือน เพื่อสุขภาวะที่ดี และมีความปลอดภัยต่อผู้บริโภค

This research aims to develop Thai herbal formulas for household cleaning products and reduce the use of chemicals by using kaffir lime herbs to extract essential oils by using a method of squeezing from the bark. The result is a dark green essential oil with a pleasant aroma when mixed with liquid hand soap and natural residues such as water extracted from silkworm cocoons to add moisture and lye to remove it. Reduce the use of chemical flavoring agents the use of coloring chemicals the use of moisturizing agents and the use of degreasers. In this research the formula for hand washing liquid soap using 80 ml. of essential oil from kaffir lime peel is the right amount resulting in liquid hand soap with a pH value of 7.3 which is the value that is in the standard for mixed liquid soap products. TIS 1403-2551 can inhibit the bacteria Staphylococcus aureus (S.aureus) a bacterium that can cause diarrhea in humans.

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ภาพยนตร์สั้นอินเตอร์แรคทีฟเรื่อง ใครๆก็ทำกัน
ภาพยนตร์สั้นอินเตอร์แรคทีฟเรื่อง ใครๆก็ทำกัน

The objectives of this study were to produce an interactive short film “Everyone does it” to assess the media suitability of an interactive short film “Everyone does it” and to assess the audiences satisfaction with the medium of the interactive short film “Everyone does it” using 2 groups of samples 1) a group of experts to assess the suitability of 3 people divided into experts. opus and editing; 2) a group of high school students Nawaminthrachinuthit Benchamarajalai Mathayomsuksa 6 Room 2 30 people were obtained by using a specific method. by using questionnaires to collect data The statistics used to analyze the data were mean and standard deviation. The results showed that Interactive short film “Everyone does it” was overall very appropriate (=4.20 SD=0.53) and viewers towards interactive short film medium. “Everyone does it” overall satisfaction was at a high level (=4.34 SD=0.65)

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ภาพยนตร์สั้นอินเตอร์แรคทีฟ เรื่อง “เลือก”
ภาพยนตร์สั้นอินเตอร์แรคทีฟ เรื่อง “เลือก”

The goal of this research is to: 1) create a short interactive film titled select 2) to evaluate the quality of a short interactive film titled select 3) To investigate how satisfied audiences are with interactive short films titled select and 4) to provide suggestions and launch a campaign to minimize the number of pregnancies. Using sample groups: The following were the sample groups utilized in the study children between the ages of 13 and 18 who utilize this age range because there is a proclivity towards becoming pregnant early before age appropriate as a result of selecting a purposive sampling. Utilizing questionnaires to get information the following statistics were used to examine the data the Standard Deviation (SD) and Mean The studys findings revealed that overall The results of the assessment were extremely suitable (𝒙̅ =4. 0 0 S.D.= 0 . 9 6 ).The impact of audience pleasure with interactive short films titled select was discovered to be as follows with an average score of (𝒙̅ =4 . 0 8 S.D.=0.86) the overall evaluation findings were at a highly adequate level

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