จำนวน Repository ( 43 )

กำลังอัดความสามารถเก็บกักคลอไรด์และสัมประสิทธ์การแพร่คลอไรด์ของคอนกรีตผสมเถ้าก้นเตาบดละเอียดและผงหินปูน
กำลังอัดความสามารถเก็บกักคลอไรด์และสัมประสิทธ์การแพร่คลอไรด์ของคอนกรีตผสมเถ้าก้นเตาบดละเอียดและผงหินปูน

This research was aimed to study the compressive strength chloride binding capacity and chloride diffusion coefficient of concrete replaced by ground bottom ash (GBA) and limestone powder in ordinary Portland cement (OPC). The water to binder ratios were 0.55. The results showed that the compressive strength of concrete with GBA was lesser than that of OPC concrete at 28 days. Also the compressive strength of concrete with limestone powder was close to that of OPC concrete and compressive strength could develop of concrete with GBA 20% and 30% higher than that of OPC concrete at 56 days. Moreover the total chloride of the concrete containing GBA and limestone powder was less than that of OPC concrete. The chloride penetration of the concrete containing GBA and limestone powder was less than that of OPC concrete. The chloride binding capacity of the concrete made with ground bottom ash and limestone powder were higher than that of OPC concrete. Finally the chloride diffusion coefficient of the concrete containing GBA and limestone powder was less than that of OPC concrete.

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การวิเคราะห์พารามิเตอร์ที่มีผลกระทบต่อความสามารถในการต้านทานของการเจะทะลุของกระสุนบนผิวเกราะอะลูมิเนียมด้วยระเบียบวิธีไฟไนต์เอลิเมนต์
การวิเคราะห์พารามิเตอร์ที่มีผลกระทบต่อความสามารถในการต้านทานของการเจะทะลุของกระสุนบนผิวเกราะอะลูมิเนียมด้วยระเบียบวิธีไฟไนต์เอลิเมนต์

This research analyzes the parameters affecting the penetrating resistance of shells on the armor surface by the finite element method. In this study the results were compared with real bulletproof armor firing tests and finite element simulations. modeling of bulletproof armor using Solid Works program. Creating and simulating armor firing pattern using ANSYS Explicit Dynamic program. damage test is based on National Institute of Justice level 3 standards with material of the ammunition is 7.62 mm tungsten carbide (WC) and speed 847 + 9.1m/s. there are two types of bulletproof armor used in this simulation 1. SKD11 2. Aluminum AL7075. The simulations is into 1 category Simulation of stacked armor plates. The sizes of the armor plates are 6 8 and 10 mm and the angles of firing of bulletproof armor are 0 30 and 45 degrees. result of this simulation armor thickness and firing angle are factors of penetration resistance. when the angle of the projectile is tilted it will cause the projectile to deflect reducing the frictional contact from the impact.

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ความสามารถในการต้านอนุมูลอิสระโดยรวมของน้ำสกัดน้ำมันหอมระเหยจากใบพลู
ความสามารถในการต้านอนุมูลอิสระโดยรวมของน้ำสกัดน้ำมันหอมระเหยจากใบพลู

Piper Betel has been used as a medicinal herb in Thailand for a long period. Not only consumption but Piper Betal also has been used for religious belief and ritual. However the piper leave should be in the good condition without any defect. As a result there are numerous fall-grade leaves to be get rid of from agriculture. Increasing the value-added of this by- product can increase the income. Extraction of bioactive compounds by using alembic is uncomplicated and green without any solvent is required. Two products come out from this process the first one is an essential oil which is expensive. The second product is hydrosol. The piper hydrosol still contained various phytochemicals. In this study total phenolic content was investigated and was found to be in the range 31.16-73.71 GAE mg/g. Total antioxidant capacity was also studied using the DPPH method. The antioxidant activity was 0. 37▁(+)0.11 mg ascorbic acid equivalent/ ml hydrosol. However the piper hydrosol cannot inhibit P.ance S.aureus and S.epideminis. To sum up the piper hydrosol can be used as an ingredient for antioxidant cosmetics rather than antibacterial skincare.

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นวัตกรรมการพัฒนาการจัดการระบบโลจิสติกส์ 5.0 เพิ่มขีดความสามารถ การแข่งขันสินค้าชุมชนเชิงสุขภาพและพัฒนาเศรษฐกิจฐานราก
นวัตกรรมการพัฒนาการจัดการระบบโลจิสติกส์ 5.0 เพิ่มขีดความสามารถ การแข่งขันสินค้าชุมชนเชิงสุขภาพและพัฒนาเศรษฐกิจฐานราก

The objectives of this research seek to desired factors for established of model on innovative development of logistics management 5.0 to increased competitiveness of local herb product and local economic development. Theoretically the future research method using Delphi Technique approached to consensus from is purposive key informants. Who were relevance experts involving three rounds of in-depth interviews and questionnaire and the descriptive statistics included median and interquartile range (IR) were used to analyses Delphi consensus. The research findings indicated that demand chain factors consisted of 1) innovative development of customer engagement 2) innovative development of customer services 3) innovative development of customer responses and 4) innovative of manufacturing flow management. It combined with supply chain factors consisted of 1) innovative development of adaption 2) innovative development of value engineering 3) innovative development of value chain for logistics management and 4) innovative development of strategic alliance. Ultimately this above research results can be using to established model of innovative development of logistics 5.0 management to increase competitiveness of local herb products and grassroot economics development. (husband/wife/children) after retirement most of them do not have credit cards is the same sample group that has the highest level of planning for life after retirement. However the researcher tested the hypothesis and found that the majority of people are aware of the rise of an aging society and has increased investments before retirement age. Relying on government’s policy for the elderly is no longer the real answer for the people as working age groups are well prepared to plan and manage their retirement living. Moreover the educational level of the sample population is related to financial education and investment to prepare for retirement. Lastly the researcher found that working age people still need a lot of support for knowledge about sustainable retirement life management.

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การเปรียบเทียบความสามารถการดูดซับพลังงานจากวัสดุ PZT จากการจำลองการทำงานเครื่องจักร
การเปรียบเทียบความสามารถการดูดซับพลังงานจากวัสดุ PZT จากการจำลองการทำงานเครื่องจักร

The purpose of the research is to devise and implement for testing the ability to absorb energy from vibration. The results are obtained from simulating the operating status of small machines. In order to get the mechanical force from the vibrating of the machine by using piezoelectric materials (PZT) It was found that the size of the piezoelectric materials used in each condition affected the energy absorption. There are variables interested in different diameters at 27 and 35 millimeters. The result shows that the dielectric displacement is directly proportional to the force used but is inversely proportional to the size of the cross-sectional area of the piezoelectric material. In addition the ability to absorb energy in one second is 4.51 volts and has a maximum energy of 7.4 x10 -8joules.

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