DSpace Community: กองวิเทศสัมพันธ์

The Improvement Of Carbon Black From Waste Tires For Offset Printing Ink Using Coupling Agent

Tue, 23 Nov 2010 09:22:14 GMT

Title: The Improvement Of Carbon Black From Waste Tires For Offset Printing Ink Using Coupling Agent Authors: Thinnoi, Pairin; Luangsaard, Nucharin; Komasatitaya, Juntira Abstract: This work was aimed to improve the carbon black from waste tires for printing ink using coupling agent to disperse carbon black particle for making an oil-based offset ink. This experiment used 2 coupling agent, these were silane coupling and derivative fatty acid and used to produce offset inks for the 7 formulas. Formula 1 Commercail carbon black,Formula 2 carbon black was not washed by Nitric acid, formula 3 carbon black was not washed by Nitric acid and was added silane coupling agent, formula 4 carbon black was not washed by Nitric acid and was added fatty acid modified emulsifier , formula 5 carbon black was washed by nitric acid, formula 6 carbon black was washed by nitric acid and was added silane coupling, formula 7 carbon black was washed by nitric acid and was added fatty acid modified emulsifier. Bring all 6 formulas to test property to compare with offset ink commercial. First find the smallest particle of carbon black for 90 minutes. It was found that formula 4 took 20 minutes to make particles 12 micron and it is smalles particle of all. Then measured ink flow by Spread-O-Meter and measured diameter after 1 minute. It was found that formula 3 and 3 were 77 mm. and approximate commercial ink. Then measured tack of ink with Ink-O-Meter, it was found that formula 2, 3, 4, 6 and 7 were 2.4 and formula 5 was 2. Then measured viscosity and yield value of ink by Lary viscometer. It was found that formula 2 had 77 poise of ink viscosity and 670 dyne.s/cm2 of ink yield value that was approximate commercial ink. Finally measured Emulsification capacity (%) by Kershaw Water Pick up Tester. It was found that formula 6 had 74% and it was approximate commercial ink. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Development of Additional Skill Toy from dust mite defending Fabric.

Tue, 23 Nov 2010 09:17:47 GMT

Title: Development of Additional Skill Toy from dust mite defending Fabric. Authors: Krajangpo, Wipada Abstract: The objective of this research is to develop the additional skill toy from dust mite defending fabric. There are categories into three products : 1) Non decorated dust mite defending Fabric 2) Printed cartoon of dust mite defending Fabric 3) Covered colorful cloth of dust mite defending fabric. It can be divided into 3 patterns of this product : 1) the geometric style (triangle, square, hexagon), the ring toss style and the jigsaw style. The findings of this research were as follow : In term of children between 2-6 year old they like the covered colorful cloth of dust mite defending Fabric and they choose mostly the ring toss style, followed by the printed cartoon of dust mite defending Fabric and the ring toss style. In term of parents group have never seen this product and they think that the using material is suitable. Besides, they prefer the geometric style in vibrant colors for decorating the printing method and covered colorful cloth of dust mite defending fabric as well as the choosing product should realize the important health. Moreover, they prefer very much the decoration of printed cartoon of dust mite defending fabric in the ring toss. In case of product, they prefer the geometric about size, style and suitability. In term of general interested people group have never seen this product and they think that the using material is suitable. Besides, they prefer the jigsaw style in vibrant colors for decorating the printing method. Moreover, they prefer the decoration of covered colorful cloth of dust mite defending fabric in the geometric style. In case of product , they prefer the geometric about size, style and suitability.. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Clothes Production from Remnant Fabrics

Tue, 23 Nov 2010 09:15:54 GMT

Title: Clothes Production from Remnant Fabrics Authors: Yanwiroj, Kanyuma Abstract: This research was concerned about clothes production from remnant fabrics that can increase product value and meet market demand by using patchwork and appliqué technique. The research was conducted into 3 phases : data collecting, prototype production and consumer satisfaction evaluation. Questionnaires were used as instrument for data collecting. The first one the researcher inquired; what kind of products that consumer expected to see from remnant fabrics and collected data as market demand in order to produce 9 prototypes by using patchwork and appliqué technique. Finally, the prototype was provided to the sample group with the questionnaire in order to evaluate consumer satisfaction toward the prototype. The obtained data from the first questionnaire showed the most of sample was believed that product from remnant fabrics was a low price with poor quality and has no attractive design. The majority of sample interested in apparel product produced from remnant fabrics and sign of the zodiac was selected for decorative pattern. In comparison the result between the first and second questionnaire found that, patchwork and appliqué technique could change people attitude toward the product from remnant fabrics. The satisfaction of sample group towards prototype product was ranging in high level. The most of sample group agree to patchwork and appliqué was appropriate technique for transformation and value added to remnant fabric. A price of prototype estimated by consumer was 2,001 - 3,000 baht per item. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Development of Batik Painting Technique Silk Fabric via Natural Dyes

Tue, 23 Nov 2010 09:13:37 GMT

Title: Development of Batik Painting Technique Silk Fabric via Natural Dyes Authors: Klaichoi, Charoon; Padungtos, Wiroj Abstract: The aim of this research is to paint silk fabric with batik technique using five natural dyes from margosa bark, lac, mango leaves, marigold and otaheite gooseberry bark. The pre-mordant and after-mordant techniques were used in this work. Ten mordants, Aluminum potassium sulphate, Copper (II) sulphate, Sodium dichromate, Tannic acid, Tartaric acid, Tin (II) chloride and Calcium acetate-monohydrate were applied. The batik fabrics were characterized in color strength, rubbing fastness, washing fastness, light fastness and stiffness. The result indicated that silk fabric painted with natural dye from margosa bark could use all 10 mordants to improve color strength and gave various shades of color. The silk fabric painted with natural dye from lac could not use all 10 mordants to improve color strength, but it gave various shade. The silk fabric painted with natural dye from mango leaves, marigold and otaheite gooseberry bark showed that almost 10 mordants gave higher color strength and various shade. The mordanting technique would give good fastness and reduce the stiffness of batik fabric. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Development of the Apparel Product Style from Teen Chok Fabric Mae Chaem District, Chiangmai Province for Local Product Standard

Tue, 23 Nov 2010 09:08:27 GMT

Title: Development of the Apparel Product Style from Teen Chok Fabric Mae Chaem District, Chiangmai Province for Local Product Standard Authors: Numahun, Pojana; Thangtam, Usa; Changmuong, Wassana; Sutisung, Suree; Promlawan, Kamol; Krajangpo, Wipada Abstract: The purpose of this research was to development of the apparel product style from Teen Chok Fabric of Mae Chaem District in Chiangmai province and technology relay of the apparel product development for the target group. This research managed by the survey, the design, the analyze, the prepare a apparel pattern, the apparel pattern evaluation, the target training, the training management and the analytical information. The research result were the nine apparel patterns that were decorative casual apparels with Teen Chok Fabric. The technique used patchwork, patches, gatherings and fillings etc. The opinion of the interested groups in the apparel pattern and evaluation were blouse pattern D, B and I were the highest suitable in both patterns and decorations. The participants found that the community group participants in Chang Choeng Village of Mae Chaem district in Chiangmai. Before they were trained, they had known in a few design, the sewing and the decoration in medium level. After they had been training, they know three parts in high level and they would require the next training in the highest level. The average were good level. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Studying and Product Development of Handicraft from Elephant Dung Paper for Adding Income to Community at Changwat Phra Nakhon Si Ayutthaya

Tue, 23 Nov 2010 08:57:19 GMT

Title: Studying and Product Development of Handicraft from Elephant Dung Paper for Adding Income to Community at Changwat Phra Nakhon Si Ayutthaya Authors: Ruengsombat, Mayuree; Phontharaphong, Yuvadee; Rakisarakul, Thinnawong; Tongsupon, Mantana Abstract: The research aimed to study and develop handicraft products from elephant dung paper for community income generation in Changwat Phra Nakhon Si Ayutthaya and to compare the product satisfaction of the target group for the original style and the new one of elephant dung paper. The target group was composed of 143 tourists from other provinces and 143 local tourists. Both target groups would like to buy handicraft products from elephant dung paper and help generate community income in Changwat Phra Nakhon Si Ayutthaya. Research tool used were questionnaire and data were analyzed by statistical percentage, mean and mode. Questionnaire was used for the product attributes satisfaction evaluation of the target group including alternative evaluation process and comparison of product styles evaluation process. Data were analyzed by statistically percentage, mean and t-test dependent sample. The results were as follows: 1. The target group chose the third style on 3 designs of handicraft products from elephant dung paper. 2. For the product attribute satisfaction of the target group, it was found that the new style of handicraft product was more acceptable than the original one at a significance level of 0.05. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Development of New Mixed Fiber from Waste Cocoon and Other Plant Fibers

Tue, 23 Nov 2010 07:28:28 GMT

Title: The Development of New Mixed Fiber from Waste Cocoon and Other Plant Fibers Authors: Ariyakuare, Kittisak Abstract: The purpose of this research was to develop new mixed fiber from waste cocoon and other plant fibers. It was found that waste cocoon has qualitative properties to produce new mixed fiber when mixed with five kinds of plant fibers, namely cotton yarn, linen yarn, pineapple yarn, ramie yarn and hemp yarn. The processes included boiling waste cocoon in wetting agent water and Sodium Carbonate for 30 minutes at 90 ºC, and dehydrating it. After that, short cocoon yarn was obtained. Then mix it with the five kinds of plant fibers with the ratio of 50:50 in carding at silk card, and undergo mixing and spinning process. Qualitative test result of new mixed fiber from waste cocoon used as weft yarn, and five kinds of plant fibers used as warp yarn in industrial weaving showed that fiber from waste cocoon mixed with hemp yarn has the best breaking strength of 194 CN/tex, followed by waste cocoon mixed with ramie yarn of 149 CN/tex, waste cocoon mixed with linen yarn of 146 CN/tex, waste cocoon mixed with pineapple yarn of 145 CN/tex, and waste cocoon mixed with cotton yarn of 143 CN/tex. Meanwhile, fiber from waste cocoon mixed with heft yarn has the best mean elongation of 2.30 cm, followed by waste cocoon mixed with cotton yarn of 2.32 cm, waste cocoon mixed with ramie yarn of 2.77 cm, waste cocoon mixed with linen yarn of 3.42 cm., and waste cocoon mixed with pineapple yarn of 3.43 cm. Thus, the research results indicated that fiber from waste cocoon mixed with hemp yarn is good for producing home textile as it has the highest breaking strength while fiber from waste cocoon mixed with pineapple yarn is good for producing clothes. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Investigated on Removal of Residual Dyestuff in Effluent from Dyeing Process: Physical Method

Tue, 23 Nov 2010 07:25:24 GMT

Title: Investigated on Removal of Residual Dyestuff in Effluent from Dyeing Process: Physical Method Authors: Luepong, Kanchana Abstract: This study was investigated the pretreatment of dye effluent from dyeing process by activated carbon. The study parameters were color strength, operating time, and types of dyestuff such as direct dye, reactive dye, acid dye, basic dye, and disperse dye. The results found, the activated carbon was achieved to adsorb the colorant. The pretreatment process used 100 – 200 gram activated carbon to one liter of dye effluent. The contact time was 2 hours at room temperature. The dyeing conditions had an influent for pretreatment process. The acidic condition was favored than neutral and basic condition. In addition, the dye removal efficiency was basic dye > acid dye > disperse dye > direct dye > reactive dye. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Causticization and Anticrease finish in Continuous Process

Tue, 23 Nov 2010 07:20:49 GMT

Title: Causticization and Anticrease finish in Continuous Process Authors: Punyacharoennon, Phairat; Sarikanon, Chamlong Abstract: The adsorption of cotton fabric is improved by treatment with sodium hydroxide, which is called causticization method. In the method, it is necessary to wash off unreacted sodium hydroxide from the fabric and then neutralize with some acids, such as acetic acid and sulphuric acid. In this research, citric acid was used to neutralize causticized fabric and anticrease finish on cotton fabric. The citric acid is non-formaldehyde anticrease finishing agent. So that the two processes, i.e. causticization and anticrease finish, could be combined into one continuous process. And it was found that the causticization would improve some properties of anticrease fabric with citric acid. From the result, it showed that the anticrease fabric had lower tensile strength than untreated fabric. The anticrease finish with 6% w/v citric acid had higher tensile strength than 8 and 10 % w/v, respectively. When concentration of acid, curing temperature and time were higher, wrinkle recovery angle would be increased. The effect of catalyst showed that anticrease finish using sodium hypophosphite as catalyst was higher wrinkle recovery angle and tensile strength than non-catalyst finish. The causticization before anticrease finish would increase tensile strength and whiteness of fabric when compared to only anticrease finish. The effect of catalyst showed that at low acid concentration, increasing of catalyst didn’t have effect on tensile strength and wrinkle recovery angle value. At higher acid concentration, trend of tensile strength was decreased whereas wrinkle recovery angle increased and slightly effect on whiteness. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Design and Product Development Ceramics Using for Making Wall of Energy Conservation Building

Tue, 23 Nov 2010 07:10:24 GMT

Title: Design and Product Development Ceramics Using for Making Wall of Energy Conservation Building Authors: Tunprawat, Chanon; Sijuntheuk, Kiattiphong; Reungsombat, Mayuree; Porntharaphong, Yuwadee Abstract: This research aims to study and develop ceramics material using in the wall construction which can be used to proof the heat and water, reduce absorbed humidity in the building. The product can save the energy, especially, the building which is set the air conditioning. The experiment found that the proportion of clay body can be developed and the result of thermal conductivity (K- value) was 0.111 W/ m. /K, the permeability was 7 percent, the glaze can be used to proof water. The product was compared to three kinds of construction materials which are brick, concrete masonry unit, and autoclaved aerated concrete found that K- value and permeability were lower. Moreover, it can proof water and save more energy for the air conditioning building. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Role of Vacuole and Vacuolar H+-ATPase in Tolerance to Cadmium in Saccharomyces Cerevisiae

Tue, 23 Nov 2010 06:57:55 GMT

Title: The Role of Vacuole and Vacuolar H+-ATPase in Tolerance to Cadmium in Saccharomyces Cerevisiae Authors: Jindarungraung, Supat; Bhubhanil, Sakkarin; Auesukaree, Choowong Abstract: Heavy metal is one of the major environmental pollutants. However, the protective cellular mechanisms in response to heavy metal stress are not well-understood yet. Previously, it has been found that the yeast deletion mutants lacking vacuolar H+-ATPase (V-ATPase) activity, which functions in vacuolar acidification, exhibited growth defects under cadmium stress conditions. In addition, several genes involved in H+-ATPase have been recently found to be required for resistance to aluminum. To investigate the roles of vacuolar H+-ATPase, plasma membrane H+-ATPase, and mitochondrial H+-ATPase in tolerance to cadmium, we examined the growth of yeast deletion mutants lacking different types of H+-ATPase in YPD media containing 80 μM of cadmium. Our results showed that a number of mutants lacking V-ATPase activity were sensitive to cadmium, suggesting the important role of V-ATPase in cadmium detoxification. We next examined the growth of mutants lacking genes responsible for different vacuolar functions in order to investigate the functional activities of vacuoles involved in cadmium detoxification mechanism. We found that the mutants lacking vacuolar protein-sorting genes exhibited high sensitivity to cadmium as well, suggesting the importance of protein transportation during cadmium stress. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Role of the MAPK Pathways in Response to Ethanol Stress in Saccharomyces cerevisiae

Tue, 23 Nov 2010 06:54:05 GMT

Title: The Role of the MAPK Pathways in Response to Ethanol Stress in Saccharomyces cerevisiae Authors: Udom, Nisarut Abstract: During fermentation process, yeast cells are often exposed to ethanol. Although the toxicity of ethanol to budding yeast Saccharomyces cerevisiae has widely been studied, the ethanol stress signaling is still unknown. The growth of the mutants lacking genes involved in the mitogen activated protein kinase (MAPK) pathways was examined under ethanol stress condition. Our results revealed that the STE3, and AKR1 genes involved in the pheromone signaling pathway, and the BCK1, MPK1, SWI4, SWI6, and MBP1 genes involved in the cell wall integrity pathway, were required for tolerance to ethanol. In addition to the mutants of the cell wall integrity pathway, the Δste3 and Δakr1 mutants were sensitive to a cell wall perturbing agent, calcoflour white, suggesting the role of these signaling molecules in maintaining cell wall during ethanol stress. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Life Cycle Assessment Study For Two Different Phenol Production Processes

Mon, 22 Nov 2010 08:43:34 GMT

Title: Life Cycle Assessment Study For Two Different Phenol Production Processes Authors: Ponkham, Wilaiwan; Kittisupakorn, Paisan Abstract: Phenol is an important raw material in many branches of industry (petrochemical, pharmaceutical, plastic and pesticidal chemical industry ). This research study on phenol production processes by using two different phenol production processes which are cumene oxidation (the Hock process) and toluene oxidation (the Dow process). In order to study in environmental impacts, Life Cycle Assessment (LCA) is applied to evaluate environmental impacts of phenol production processes. Environmental impacts are evaluated according to cradle-to-gate approach by using SimaPro 7.1 software for Life Cycle Assessment . Approach by IMPACT 2002+ . The result shows that cumene process is more environmentally favorable than toluene process. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Soil Respiration of Natural Forest, Forest Plantation and Agricutural Incubated Soils

Mon, 22 Nov 2010 08:38:50 GMT

Title: Soil Respiration of Natural Forest, Forest Plantation and Agricutural Incubated Soils Authors: Dorji, Karma; Suwanwaree, Pongthep Abstract: Recently, scientists have focused attention on soil as a major source and sink for atmospheric CO2. Three replications of two-depth soils from eleven different ecosystem types from Sakaerat Environmental Research Station (SERS), Sakaerat Silvicultural Research Station (SSRS) and Suranaree University of Technology (SUT), Nakhon Ratchasima were collected during the first week of March, 2010. The soils were then incubated at 25°C for three days and measured their respiration rates. The highest soil respiration rate was found in sunflower with 0.823 μmol CO2 g-1 h-1 while the lowest was found in eucalyptus plantation in SUT with 0.005 μmol CO2 g-1 h-1. Additionally between two natural forests at SERS, the respiration rate of dry evergreen forest was higher than in dry dipterocarp forest with the value of 0.037 and 0.016 μmol CO2 g-1 h-1 respectively. Whereas the soil respiration rate at SSRS forests was highest in the eucalyptus plantation (0.048 μmol CO2 g-1 h-1) and lowest in acacia plantation (0.027 μmol CO2 g-1 h-1). The overall respiration rate was higher for soils from 0-5 cm than 5-15 cm, but not statistically significant difference. Soil water content and pH were positively significant related with soil respiration (p<0.01). Soil carbon, however, was also positively significant related with soil respiration but in lesser degree (p<0.05). Therefore soil water content and pH should be major driving forces for soil respiration. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Potential of Plant Essential Oils as Biofumigant Agains Fungal Pathogens of Postharvest Tomato

Mon, 22 Nov 2010 08:35:39 GMT

Title: The Potential of Plant Essential Oils as Biofumigant Agains Fungal Pathogens of Postharvest Tomato Authors: Siripornvisal, Sirirat; Ngamchawee, Kittipot Abstract: However recognized as more sustainable and safer way for crop production, organic agriculture is still facing many technical difficulties. One of the problems is concerning the management of posthavest disease caused by fungal pathogens. Since the applications of synthetic fungicides are prohibited, thus organically produced crops are more vulnerable to be attacked by pathogens. Therefore, the development of novel, reliable and more compliant technologies for diseases management are required. The aim of this study was to demonstrate the potential use of plant essential oils as biofumigant to control of fungal diseases of tomato during storage. We selected three essential oils, including clove oil, cinnamon oil and ajowan oil, for this study. The in vitro test for antifungal activity showed that the volatile headspace of the three oils exhibited potent effect on the test pathogens which includes Botrytis cinerea, Fusaruim oxysporum and Aspergillus niger. Then ajowan oil, which showed highest inhibitory effect, was further evaluated for its effectiveness when applied as biofumigant. Results from the experiment indicated that fumigation with ajowan oil can reduce the occurrence gray mold decay of tomato (caused by B. cinerea) significantly. The rate of control was up to 100 % during fifteen days of storage at 20 ºC. These results support the idea of using the essential oil as biofumigant for protection of postharvest tomato from fungal diseases. However, further comprehensive studies are still required especially on the issues concerning the reliability and eco-efficiency of this method at trial and commercial level. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Development of a Computer Assisted Instruction Package with Tutorial Through E-Learning on Computer Technology Curriculum

Mon, 22 Nov 2010 08:31:00 GMT

Title: The Development of a Computer Assisted Instruction Package with Tutorial Through E-Learning on Computer Technology Curriculum Authors: Singhatham, Wanida; Intrapunya, Ubolwan Abstract: The purposes of the research were to design and develop a computer assisted instruction package with tutorial through e-learning on computer technology curriculum and to find out efficiency, effectiveness and learners’ satisfaction towards the package. The research tools are 1) the Computer Instruction Package on Database Management System Subject, 2) Achievement evaluations, 3) Quality assessment and evaluation form for multimedia software and 4) Questionnaire of learners’ satisfaction. The research results reveals that the efficiency of the Computer Instruction Package was at 82.50/82.56, corresponding with 80/80 criteria. The analysis of pre-test and post-test scores finds that the effectiveness after the process (Epost) was at 82.56, which was higher than one tested before the process (Epre) which was at 14.62. Therefore the Computer Instruction Package on Program Design and Development could increase the students learning effectiveness up to 67.94, corresponding with 60 criteria. The Mean of satisfaction of the sampling groups was rather at a high level (4.28). It could be concluded that the Computer Assisted Instruction Package with tutorial through e-learning on computer technology curriculum had the efficiency that could used for self study. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Individual Factors that Effect the Production of the Graduates of Rajamangala University of Technology Phra Nakhon

Mon, 22 Nov 2010 08:25:38 GMT

Title: Individual Factors that Effect the Production of the Graduates of Rajamangala University of Technology Phra Nakhon Authors: Intrapunya, Ubolwan; Peawthong, Ratchanee Abstract: The purpose of this study was to study individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon. The survey method, by questionnaire, was used to collect data from students in their 4th year who were in the 4-year program and 2-year continual program of the university, 350 in total. The collected data was analyzed with a statistical software program to calculate the percentage, means, standard deviations, t-test and One-way ANOVA. The level of statistical significance was set at .05. The result reveals that individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon were age, faculty, academic record, previous education, resident characteristic, the relationship of student behaviour, learning condition and satisfaction towards graduates production. Meanwhile, factors of gender and study program didn’t affect individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Development of Electronic Test to Measure Students’ English Abilities of Rajamangala University of Technology Phra Nakhon

Mon, 22 Nov 2010 08:23:07 GMT

Title: Development of Electronic Test to Measure Students’ English Abilities of Rajamangala University of Technology Phra Nakhon Authors: Phothisorn, Watchara Abstract: The purposes of this research were to build and develop a standardized test used to measure English abilities compliant with the curriculum of the fourth-year students of Rajamangala University of Technology Phra Nakhon. There were two groups of the students, namely, the first group which consisted of 57 students who took the traditional pilot paper test, and the latter which consisted of 63 students taking the electronic test via the Internet. The other purposes were to find out the students/users’ attitudes and satisfaction towards the use of the electronic test, and to obtain a computer program prototype for measuring English abilities. The results were as follows: 1. The item analysis of the pilot paper test revealed that there were 64 items of appropriate difficulty index and discrimination power, whereas that of the electronic test revealed that only 56 items had appropriate difficulty index and discrimination power. Even though the latter test had been improved, the accepted items were fewer. This led to the assumption that the characteristics of doing an electronic test affected students’ decisions and made them guess more than when they took a paper test. 2. The questionnaires analysis of students’ satisfaction of using the electronic test program to measure their English abilities revealed that the overall arithmetic mean was 75.72. The highest scored item of 87.59 percent was “I think this e-test program is useful”; and the lowest scored item of 66.21 percent was “I think the screen format is interesting”. Moreover, there were 11 users who showed their positive opinions towards the e-test program which was 18.97 percent of the latter group. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Calculation of Thermoelectric Properties of Doped SrTiO3

Mon, 22 Nov 2010 08:20:53 GMT

Title: Calculation of Thermoelectric Properties of Doped SrTiO3 Authors: Chanapote, T.; Yangthaisong, A. Abstract: Thermoelectric properties of cubic perovskite SrTiO3 have been investigated. The energy band structures are calculated using the total energy plane-wave pseudopotential method within the local density approximation (LDA) and generalized gradient approximation (GGA). The calculated energy band structures are then used in combination with Boltzmann transport equation to calculate the thermoelectric parameters of doped SrTiO3 especially seebeck coefficient, electrical conductivity and electronic thermal conductivity. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Optimization of Infrared Radiation Heating in Disinfestations of Organic Hom Mali Rice

Mon, 22 Nov 2010 08:18:12 GMT

Title: Optimization of Infrared Radiation Heating in Disinfestations of Organic Hom Mali Rice Authors: Insorn, Withaya; Lee, Sukangkana; Janyalertadun, Adun Abstract: There is a difficulty in using chemical in disinfestations process in organic rice products therefore, this research was aimed to study the optimal setting of infrared radiation heating for disinfestations in Organic Hom Mali Rice. Disinfestations process and rice storage were collected by surveying coupled with interviewing the rice milling enterprise. The infrared radiation heating used in this experiment was belt type with lamp power of 1000 watt. In this study, Design of experimental technique was applied to generate the optimum setting of the infrared heating process. The experiments generated by Box Behnken design were 15 experiments and 2 replicate times, therefore the total experiments were 30 times. The 3 factors include heating temperature, gap between rice and infrared lamp and rice layer thickness. The result from statistical data analysis at reliability level of 95 % shown that the optimization value were heating temperature of 70 oC, height of lamp above rice of 10 cm. and rice thickness of 0.5 cm, insects mortality rate within 2-3 minutes. Rice after heating were subjected to naturally slow cooling by air, therefore rice quality in a good condition without broken or cracking. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Improvement of Efficiency in Biodegradable Packaging Process

Mon, 22 Nov 2010 08:12:47 GMT

Title: Improvement of Efficiency in Biodegradable Packaging Process Authors: Sritarathorn, K.; Mounjun, P.; Warinsiriruk, E. Abstract: This industrial research was studied an improvement of efficiency in natural fiber production plant. The objective was improvement process by using IE techniques which this method was once green technology for industrial problems solving. Now, process had build-up in process (WIP) due to unbalance times between trimming station and visual inspection of station. Therefore, the research studied work of staffs; time study and data analysis through 5W1H were used for analysis of WIP root cause. The cause of problems founded were the transportation loss of between section had over necessity and loss of visual inspection for repair. Therefore, it had bottleneck in process. Consequently, the researchers applied ECRS in each working processed by separation of repair station. Repairs of items were isolated from the main flow path of the process. Calculating of work flow rate was used for identified operator for repair station. As a result of the above production improvement, Times of visual inspection in a lot was decrease from 283.84 hrs to 160.19 hrs. It was decreased in 43.56%. In addition, the effect of separation from the repair process made the total times of all process was decreased from 792.78 hrs/lot to 669.14 hrs/lot. It was decreased in 15.60% and decreased work in process had from 17 lots/day to no work in process. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

The Study on Microstructure and Mechanical Properties of Silver alloy 58.4% for Jewelry Manufacturing

Mon, 22 Nov 2010 08:08:11 GMT

Title: The Study on Microstructure and Mechanical Properties of Silver alloy 58.4% for Jewelry Manufacturing Authors: Salanay, Thanatip; Torsakul, Sirichai Abstract: The research involved the characterization of the properties of silver alloys -bearing copper and zinc. The alloys composed of 58.4% silver 20.85-41.76% copper and 0-20.83% zinc, respectively. When comparing the characteristics of this alloy and sterling silver 925, the alloy specimen had mechanical properties better than the sterling silver 925. The alloy tests presenting the mechanical values of the hardness, shear bond strength, elasticity of the specimen were in a range of 54.6-95.3 HV1, 209.5-379.3 MPa., 100.6-193.8 MPa. and 32.1-51.7%, respectively. While the mechanical values of sterling silver 925 were 52.8 HV1, 193.5MPa., 96.0 MPa. and 29.8%, respectively. Besides these, the microstructure of the alloy specimen showed the dendrite structure. We found that this structure decreased when the concentration copper in the specimen increased. After adding zinc into the alloys, the high amount of zinc caused the zinc-rich (alpha) phase changed to Eutectic phase, together with the significantly increased area of alpha phase. These effects, therefore, brought up the better various mechanical properties of the alloys. At the same time, the another test specimen composed 58.67% Ag 39.20% Cu and 2.14% zinc. The color level of this specimen was close typically to the sterling silver 925, with the difference of Da at 0.236 and Db only at 5.268. Additionally, the higher copper concentration in the alloy provided a value tentatively increased but b value decreased. However, more remarkable results were that the zinc showed opposite effects from the copper. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Competency Assessment for Administrators Under Jurisdiction the Office of Vocational Education Commission

Mon, 22 Nov 2010 08:02:14 GMT

Title: Competency Assessment for Administrators Under Jurisdiction the Office of Vocational Education Commission Authors: Sirimai, Kajohnsak; Shinatrakool, Ravewan; Boonyasopon, Teravuti Abstract: This research aimed to assess the competency for vocational education administrators under Jurisdiction the Office of Vocational Education Commission, Ministry of Education by using the Needs Assessment Process to assess their 5 core competencies and 11 functional competencies. The samples were 201 vocational education administrators. The questionnaire was used for data collection. The statistics were percentage, mean, and standard deviation, respectively. The findings were summarized as follows: 1. In overall, the vocational education administrators had high levels for core and functional competencies. 2. The competencies were ordered based on its mean as follows: 2.1 Core competencies: moral and ethics, good governance, team work, achievement motivation and expertise 2.2 Functional competencies: self confidence, leadership, empowering others, organization awareness, human resources development,vision,self control,works control and monitoring, analytical thinking, communication and strategic orientation. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Green Power Zone

Mon, 22 Nov 2010 07:58:46 GMT

Title: Green Power Zone Authors: Chankhamrian, Wuthikrai; Bhumkittipich, Krischonme Abstract: This paper presents the concept, prospect and operation of Green Power Zone (GPZ). The GPZ is defined as part of power grid which provides electrical energy with varying quality depends on customer requirement. Different power quality levels in the premium zone can rang from better than normal utility supply to a supply close to an ideal situation. Electrical energy to the zone is supplied through two feeders from two independent substations. The GPZ center is fully equipped with custom power devices, namely dynamic voltage restorer (DVR) and distribution static compensator (DSTATCOM) or even unified power quality conditioner (UPQC). The GPZ can also contain a distributed generator (DG) to take care the power interruption situations from the utility. The incoming feeders to the zone can be designed with improved grounding, insulation, arresters and reclosing. The simulation results are shown the performance of GPZ by using digital computer simulation program. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Influence of Plasma Treatment on the Flexural Properties of Geopolymer Composites

Mon, 22 Nov 2010 07:54:21 GMT

Title: Influence of Plasma Treatment on the Flexural Properties of Geopolymer Composites Authors: Xiem, N. T.; Kroisová, D.; Louda, P.; Bortnovsky, O. Abstract: In recently years, geopolymer or polysialate composites have been developed and applied for a variety of fields. They are known as inorganic matrices composites, which are fabricated and cured at room temperature or thermoseted in a simple autoclave. Geopolymer composites provide an excellent opportunity for achieving the goal of producing low cost high temperature resistant composite. The aim of this study is an investigation and comparing the flexural properties of geopolymer composites after reinforcements were influenced by plasma treatment with original fibre fabric. And preliminary results of the improvement in tensile strength, Young’s modulus, elongation of E-glass fibre fabric due to plasma treatment are studied in this paper. Many reinforcements and geopolymer matrices are now available, but our works are focused on geopolymer composite Q17, Q13K-1 combination with E-glass fibre fabric which was investigated, fabrication procedures together with their specific properties of these materials have been evaluated, compared and discussed. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Fluctuation Voltage Control of Wind Turbines via STATCOM

Mon, 22 Nov 2010 07:50:04 GMT

Title: Fluctuation Voltage Control of Wind Turbines via STATCOM Authors: Srisongkram, Warunee; Bhumkittipich, Krischonme; Unahalekhaka, Pramuk Abstract: This paper presents distributed STATCOM for controlling voltage in distribution line with wind turbines generations at 48 volts. The connection of wind turbine to distribution systems may affect the voltage quality offered to the consumers. One of the factors contributing to this effect is the rapid variations of the wind turbine output power, which cause respective fluctuations in the supply voltage. This paper presents the design, control and analysis of a Distributed STATCOM when combined with a wind turbine comprising small variable speed generators, in this paper it is shown that the distributed STATCOM, controlled via a rotating referent frame: RRF and recursive DFT are simple method to DSP control technique. The result of experiments the STATCOM can improve the transient stability voltage of wind turbine that we have referred the IEEE1159:1995 standard of power quality. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยี ราชมงคลพระนคร, 2553

Development of Smart Monitoring System for Wind Energy System

Mon, 22 Nov 2010 07:40:32 GMT

Title: Development of Smart Monitoring System for Wind Energy System Authors: Srisongkram, Warunee; Plangklang, Boonyang; Boonme, Chaiyant Abstract: The paper presents a development of monitoring system for a prototype wind turbine system. The proposed monitoring system is developed under Labview environment. The system can connect to the wind turbine online via internet. The system will collect the monitored values and install values into memory. Simultaneously, the system can show the values in Real-Time. The operator can observe the wind turbine by the monitoring system and can take an action on time if the wind turbine is not working properly. The results of the monitoring system indicate that the monitoring system is be able to working properly, the data can be used to investigate the wind turbine for system analysis. This is very important for wind turbine in order to supply energy to consumer stably. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยี ราชมงคลพระนคร, 2553

Influence of Electrode Force Affecting the Complete of the Resistance Spot Welding

Mon, 22 Nov 2010 07:18:34 GMT

Title: Influence of Electrode Force Affecting the Complete of the Resistance Spot Welding Authors: Pearsura, Prachya Abstract: This research was to influence of electrode force affecting the complete of the resistance spot welding. The specimen was mild steel sheet metal has 1 mm. thickness. Then applied the force to the specimen are 1.0, 2.0, 3.0, 4.0 and 5.0 kN. The welded specimens were tested by tensile shear testing according to JIS Z 3136: 1999 and Macro structure testing according to JIS Z 3139: 1978.The results showed that electrode force had affected on tensile shear and nugget size at 95% confidential (P value > 0.05). The low electrode force had increase the nugget heating because it had a high resistance (Q=I2Rt) and increase the gab between specimen. When the resistance increasing so the current flow will difficult to passed that fusion zone will had a high heating. It will affected to nugget seize, heat affected zone and mechanical properties decreasing. The electrode forces are complete 2.0 kN. Tensile shear 6.39 kN and Nugget Size 5.83 mm. This data can be applied to be used as process monitoring of resistance spot weld quality. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Development of Green Energy Block Made from Paper Mill Waste Sludge

Mon, 22 Nov 2010 01:31:39 GMT

Title: Development of Green Energy Block Made from Paper Mill Waste Sludge Authors: Jitjumroonchokchai, Penja Abstract: Sludge from paper mill wastewater treatment plant is the residual composed of fibres, fibre particles and miscellaneous debris. Sludge with high fibre contents were collected from BP paper mill industry. They were retreated by 2 days drying and mixing dried sludge with tapioca starch as ratios were: 100:0, 95:5, 90:10, 85:15 and 80:20(sludge: tapioca starch). To make the green energy block by using screw-press machine compressed sludge that mixed with various ratios of tapioca starch. A size of green energy block was 6 inches diameter, 2 inches high and 150 g. weight. Energy values were tested by using Bomb-calorimeter measurement instrument. The results of testing found: the best ratio of green energy compressed for high heating value was 95:5(sludge : tapioca starch by weight) and the maximum heating value was about 19,638 J/g. This green energy block made from waste of paper mill wastewater treatment plant is a way of recycle waste to be energy and reducing waste from industry. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553

Life Cycle Assessment for the Activated Carbon Production by Coconut Shells and Palm-Oil Shells

Mon, 22 Nov 2010 01:28:10 GMT

Title: Life Cycle Assessment for the Activated Carbon Production by Coconut Shells and Palm-Oil Shells Authors: Noijuntira, I-sika; Kittisupakorn, Paisan Abstract: Activated carbon, also called activated charcoal or activated coal is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions. In this research studies environmental impacts of activated carbon production processes which produced from two types of agricultural by-products namely : coconut shells and palm-oil shells . SimaPro software is applied to evaluate the environmental impacts of both processes. The results have shown that the environmental impacts for the process using coconut shells as raw material is higher than that using palm –oil shells as raw material. Description: รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553