จำนวน Repository ( 1852 )
การปรับปรุงสมบัติทางกลและความสามารถในการขึ้นรูปของพลาสติกชีวภาพที่ทำมาจากโปรตีนกลูเตนโดยการใช้ยางธรรมชาติ
The aims of this research work were to enhance the impact resistance and processibilty of wheat gluten (WG) by the addition of epoxidized natural rubber (ENR) compared to glycerol. This work was divided into two parts: to study the optimum ENR content for improvement of WG and the effect of together functions between ENR and glycerol on the properties of WG. Tested specimens were mixed and prepared by internal mixer and compression molding machine respectively. ENR and glycerol were varied from 10 to 40 phr. The effects of modifier types and contents on WG were evaluated by tensile impact and water absorption testing and thermal analysis. Fracture behavior and rubber dispersion were investigate with scanning electron microscope (SEM). The result revealed that the increase of ENR or Glycerol contents led to the decreases in tensile modulus and strength except for modifier content of 10 phr whereas elongation at break and impact strength increased. Glass transition temperature (Tg) of modified WG tended to decreased with the increase of ENR or glycerol contents especially for glycerol. The presence of glycerol affected on the decomposition temperature (Td) values but those were unchanged for case of ENR. Water resistant of WG specimen was improved by the presence of ENR whereas the increase of glycerol led to weight loss at immersion time of 2880 min. For the effect of ENR : glycerol ratios it indicated that glycerol enhanced tensile resistances but suppressed impact and water resistances of modified WG by ENR. Sizes and dispersion of ENR particles were improved by the addition of glycerol. Tg and Td values of modified WG by ENR and glycerol increased when ENR fractions were increased.
การศึกษาอุณหภูมิการหล่อต้นแบบแว็กซ์ชนิด EC 500 เพื่อลดของเสียจากกระบวนการผลิตเครื่องประดับเงิน
The purpose of this research was to investigate the optimum heat temperature for the EC500 wax cured basecoat extrusion from all castings without waxing in the mortar. To reduce waste when the casting mortar through the casting process Silver Sterling 925 silver jewelry company Muang District Chiang Mai where the waste is caused by waxing outflow. The imperfections and leave waxing inside. Experiment with high temperature heat in mortar. And analyze the quality of work surface after casting with microscope. To find defects such as droplets and porosities caused by a range of temperatures. Temperature of baking mortar There is a difference from the conventional waxing mortar temperature. That is outflow of EC500 type wax. In the mortar to live. High heat The results of the 100 sample EC500 wax samples were tested at a temperature of 25 ° C. The mortar temperature was 700 ° C. 60 percent of waste was found the mortar was laid at 750 ° C 54 percent of waste was found. The mortar temperature was 800 ° C 32 percent waste was found the mortar temperature was 850° C Detecting 1 percent waste. The results of the study show that heat temperatures of up to 850 ° C can solve the problem of casting sterling silver alloys from the EC500 wax model. Finds the least waste.
การศึกษากระบวนการทำงานของ Mirai botnet ในความปลอดภัยด้านไซเบอร์ของ มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
This research aims to study the Mirai Botnet working process which made high bandwidth impacted to Internet system. From 90000 clients of Deutsche Telekom cannot access to Internet that overall bandwidth growth nearly 1 TB per second in the history DDoS attacking behavior. As Mirai exaggerated attacking to ISPs and may be involved UniNet as a big umbrella which RMUTP network interconnected as well. The author would like to study in depth to several weak points of the end devices or IoT on Internet. In the Mirai code used the IoT devices such as the Internet cameras the CPUs based on ARM ARM7 Motorola 6800 SPC PowerPC X86 and SuperH (SH4). As the results of valuable attacking code studied based-on IPV4 attack without IPV6. The source code has more than 5500 lines with 16 files and 138 functions included 62 set of user accounts and passwords. Usage the 9 flooding techniques for port attacking via 22 23 and 80 with the IP scanning exceptions for DoD IANA GE and HP IP addresses. The Internet camera devices have to disable 22 23 and 80 ports or doing suitable usability techniques to manage for several flooding protection from system harmfully.
การศึกษาความเป็นไปได้ในการผลิตฝากระโปรงรถยนต์จากแกลบและผักตบชวาเพื่อรองรับการชนคนเดินเท้า
Recently the Thai industry has continually grown up and also plays a role to economic growth in the country which affects the many of automotive components to be in the market. While the degeneration and waste of automotive components had increased as well. Therefore a car hood is one of the automotive parts which damage from the accident. Consequently the researchers have created a prototype material to develop into the car hood which made from the husk and water hyacinth. The random mixture of water hyacinth and husk was attempted to more than 3 ingredients. By forming a flat plate with thickness between 1 to 3 millimeters was used as prototype of the car hood material in this research. Thus the mechanical properties such as compressing and bending test were attempted to by the universal testing machine. The results showed that using resin as a binder material (Reinforced resin by water hyacinth and husk) will have the less ability of energy absorption. While using polymers as a binder (Polymer resin by water hyacinth and husk) will have the better ability of energy absorption. The properly mixture between water hyacinth and husk referred to the energy absorbing properties is 50:50 because the least linear stiffness is 1.087 N/mm. Besides the ability of energy absorption is 1612444 J/m3 which is property of this ingredient can reduce the severity of the impact in the event of pedestrians collision in the best.
การตรวจสอบโครงสร้างและสมบัติทางกลของตะกรันอลูมิเนียม
This research to examine the structure and mechanical properties of aluminum dross. A research project knowledge the aim is to study the microstructure and the mechanical properties of materials. The research is divided into two parts: 1 . preparation aluminum dross material and 2. to determine the structure and mechanical properties. The material must be washed in preparation contamination and dry then crushed and sifted to 200 mesh. Analyzed the microstructure with SEM which indicated the microstructure. The amount of alumina in aluminum dross grade No.0 has 8 0 percent with a powder aluminum dross grade No.1 is a hunk with crystalline alumina component 85 percent. Aluminum dross grade No. 2 which is a big hunk has crystalline alumina components 9 0 percent. Analysis results indicates that aluminum dross can be applied to other aspects such as to produce bulletproof vests and so on.