จำนวน Repository ( 3447 )

การศึกษาอุณหภูมิการเผาเปลือกหอยลาย เพื่อเพิ่มสมบัติของอิฐมอญผสมวัสดุรีไซเคิลจากเปลือกหอยลาย
การศึกษาอุณหภูมิการเผาเปลือกหอยลาย เพื่อเพิ่มสมบัติของอิฐมอญผสมวัสดุรีไซเคิลจากเปลือกหอยลาย

This research is to study the recycling of residue clams shell from Mahachai Samutsakorn Thailand. This waste was collected from canned clams industry and it can be recycled as the composition of Mon brick instead of the rice husk. The study of clams shell composition found that Calcium was main composition as 98.50%VS. The moisture and ash content was 0.88% and 58.27%TS respectively. The works methodology is using ash from clams shell incinerated at temperature 900 1000 1100 and 1200oC in 5 hours respectively instead of rice husk in Mon brick processing. The fabrication of Mon brick was in size 5x5x5 cm adding ash from clams shell intead of rice husk. The result found that increasing the temperature to incinerate clams shell ash instead density and compressive strength increased while moisture and water absorption deceased. When Mon brick was fabricated in standard size at 6x15x3.5 cm the changed material characteristics was in the same trend as previous size. Mon brick in standard size adding 100% clams shell ash instead of rice husk had density 2.63 g/cm3 moisture content was 2.86% water absorption at 1 and 24h was 17.40 and 20.16% respectively and compressive strength was 0.52 MPa. These characteristics was according to standard of Engineering Institute of Thailand. It can reduce the cost of rice husk in Mon brick factory 28800 bath/year while the waste from canned clams factory could be reduced 20.94%.

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การปรับปรุงความเหนียวของพอลิแลกติกแอซิดด้วยวัสดุธรรมชาติที่ผ่านการดัดแปร
การปรับปรุงความเหนียวของพอลิแลกติกแอซิดด้วยวัสดุธรรมชาติที่ผ่านการดัดแปร

This research work was to study the toughening modification of polylactic acid by the mixing with epoxidized natural rubber (ENR) and the increase of effectiveness of mechanical properties with a compatibilizer. Enhancement of properties in polylactic acid was evaluated by tensile and impact testings Fourier-transform Infrared Spectroscopy (FTIR) technique Differential Scanning Calorimetry (DSC) technique and Scanning Electron Microscope (SEM). For the addition of ENR it was revealed that the increase of ENR contents improved elongation at break and impact strength but decreased tensile modulus and ultimate tensile strength. Glass transition temperature (Tg) percentage crystallinity and the melting point of polylactic acid tended to decrease with the addition of ENR. Chemical change was found that position of C=O peak in polymer blend was slightly shifted as compared to the spectrum of neat polylactic acid. The optimum formulation for toughening modification was ENR content of 30 wt%. Its impact strength was 1982.55 % of neat polylactic acid. For increasing effectiveness of mechanical properties with a compatibilizer it revealed that the addition of Joncryl ® ADR-4300 as compatibilizer improved both tensile and impact properties. The optimum loading of a compatibilizer for improving mechanical properties was 0.5 wt% of polylactic acid. The decreases of crystallinity and melting point of polylactic acid with adding Joncryl ® ADR-4300 might be because Joncryl ® ADR-4300 was also chain extender of polylactic acid and it might be obstructing crystallization. The presence of Joncryl ® ADR-4300 unaffected on Tg value and chemical change.

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ปัจจัยที่มีผลต่อความสำเร็จร้านอาหารคลีนฟู้ดเดลิเวอร์รี่ ในเขตกรุงเทพมหานคร
ปัจจัยที่มีผลต่อความสำเร็จร้านอาหารคลีนฟู้ดเดลิเวอร์รี่ ในเขตกรุงเทพมหานคร

The objects of this research were (1) to study the enterprenurial success in Clean Food Delivery Store in Bangkok (2) to study of individual factor and operation factor toward the success of Clean Food Delivery Store (3) for suggestion develop Clean Food Delivery Store. This research is servey research Tools of research is from population 158 data was collected by questionaires Statical Analize with percentage Mean Standard Deviation Mutiple Regression Analysis at the 0.05 level The result found mostly female age 30 – 40 years old their education was bachelor single income 30001 – 50000 bath Experience 1 – 2 year and knowledge from internet. The result operation factors is management marketing operation and technology and financial effect to success of Clean Food Delivery Store .

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การประดิษฐ์เซรามิกเฟร์โรอิเล็กทริกไร้ตะกั่วในระบบบิสมัทโซเดียมโพแทสเซียมไททาเนตเป็นองค์ประกอบหลัก
การประดิษฐ์เซรามิกเฟร์โรอิเล็กทริกไร้ตะกั่วในระบบบิสมัทโซเดียมโพแทสเซียมไททาเนตเป็นองค์ประกอบหลัก

The research project investigated the effects of CoO additive on dielectric ferroelectric physical and mechanical properties of modified Bi0.5(Na0.81K0.19)0.5TiO3 ceramics were investigated. The samples were synthesized by solid state reaction technique where powders were calcined at 850 °C for 4 h and ceramics were sintered at 1050 °C for 4 h which difference heating rate controlled i.e. 100 300 and 600 °C/h for. The ceramics of BNKT/x wt.% CoO was added CoO by various x=0.00 0.10 0.20 0.30 0.60 and 0.90. Phase formation was determined by X-ray diffraction technique (XRD). The X-ray diffraction analysis of the ceramics suggests that all samples exhibited a perovskite structure. The dielectric properties under room temperature and various temperatures were also determined. Dielectric measurement data showed that the additive and heating rate controlled influenced dielectric constant and dielectric loss. Furthermore the hysteresis loop behaviors slightly changed with increasing the CoO contents.

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นวัตกรรมของการตรวจสอบบัญชีและความสำเร็จในการสอบบัญชีอย่างยั่งยืนของผู้สอบบัญชีรับอนุญาตแห่งประเทศไทย
นวัตกรรมของการตรวจสอบบัญชีและความสำเร็จในการสอบบัญชีอย่างยั่งยืนของผู้สอบบัญชีรับอนุญาตแห่งประเทศไทย

This research is to investigate the effects of audit innovation on sustainable audit success of CPA in Thailand by collecting data from 4292 auditors in Thailand by using a questionnaire as an instrument. The results of statistics used for analyzing the collected data were simple linear regression analysis and multiple linear regression analysis indicated audit innovation had positive relationships with audit quality and audit reputation. Especially effective of Modern Equipment Integrative of audit search technique and audit quality had positive relationships with audit reputation. Moreover audit quality had positive relationships with audit sustainable. The results obtained from this study could be used as guidelines for developing creating and improving the efficiency of auditor performance and practice audit process to create reliability to the public and to be able to survive sustainably in a long period of time.

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