ISSN: 0125-2364, Online ISSN: 2586-9531

Volume 42 No.3 July - September 2014


P.589-599

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Numerical Study of Natural Convection Heat Transfer in Enclosure with Partition

การศึกษาเชิงตัวเลขของการพาความร้อนแบบธรรมชาติในบริเวณปิดที่มีที่กั้น

สุพจน์ ไวท์ยางกูร

In this research, we present the numerical study for natural convection heat transfer of steady flow within square enclosure with partition on the upper part of enclosure. Boundary condition, on thelower part and upper part are insulated wall. Here, the right vertical wall and partition are cooled while the left vertical wall is heated. The problem is studied for different values for Prandtl number, Rayleigh number and height of partition to compare the behavior of fluid flows.The numerical solutions are calculated by using FlexPDE 6.17 professional version and displayed in terms of isotherms and streamlines.


P.600-611

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Effect of Soaking Time and Temperature on Halo Willimite Crystal Glaze

อิทธิพลของอุณหภูมิและเวลาในการยืนไฟ ต่อการเคลือบผลึกวิลลิไมท์แบบดอกซ้อน

นงลักษณ์ มีทอง พินิตา กำลังสง่า พรจรัส ตะเพียนทอง ปาริทัศน์ ไทยทะเล สุทธิพงษ์ สืบสวน และ สุธรรม ศรีหล่มสัก

Crystal glaze makes beautiful ceramic surfaces. However, it is difficult to fire crystal glaze so that it has same beautiful look every time. This is because there are many factors which affect its appearance. In order to investigate the effects of these factors, firing profile, glaze composition and thickness of glaze were varied. It was found that larger and more beautiful Willimite crystals could be obtained by providing longer soaking time at the crystal growth temperature. Moreover, by alternately increasing and decreasing temperature during the crystal growth firing period, halo crystal glazes can form. Finally, large crystals that form attractive glazes can be obtained by increasing the number of glaze applications. However, these effects also depend upon the glaze composition.


P.612-623

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Synthesis and Biological Investigation of Nano-Organic and Nano-Organometallic Agents

การสังเคราะห์และการทดสอบฤทธิ์ทางชีวภาพ ของสารนาโนอินทรีย์และนาโนโลหะอินทรีย์

สมหมาย ปะติตังโข และ กิ่งแก้ว ปะติตังโข

This research deals with physicochemical characterization and biological investigation of organic nanoparticles and organometallic nanoparticles using natural product as reducing agent against fungi of plant diseases, scavenging anti-free radical toxicity, Pseudococcus sp. and Nilaparvata lugens (Stal). The results showed that nano-organic particles are global–like structure and nano-organometallic particles are rod-like structures. All of them showed highest biological effect against Nilaparvata lugens (Stal) within 30 minutes by which sample C4 killed them with 100 % at 10 minutes. On the other hand, such compounds killed Pseudococcus sp. within 10 minutes but for C4 spent 2 minutes only. The research finding also revealed that all of six compounds inhibit fungi of plant diseases and anti-free radical toxicity in nature with C2 and C4. It indicated the highest activities to fungi diseases in responding to the influence of nanoparticles and anions in use. However, Schiff base compounds (L1, L2) are less active than their derivative particles. For free radical scavenging activities with DPPH technique revealed that all nanoparticles shown high potent antioxidant susceptibility which low IC50, especially compounds exhibit highly potency effective are L1, C1 and C3, respectively. For FRAP technique, the such particles reduced Fe3+ to Fe2+ concentrated form like L2 and C4. This research work promises it to useful for agricultural groups that facing plant disease and also for chemist to screen them as drug for human being.


P.624-635

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Use of Quantum Well Embedded in a P-Type Layer to Enhance the Efficiency of PN-Junction Solar Cells

การแทรกโครงสร้างควอนตัมเวลล์ในชั้นพี เพื่อเพิ่มประสิทธิภาพของเซลล์แสงอาทิตย์แบบรอยต่อพีเอ็น

สมพร ขันเงิน สุริยา ชิณวงศ์ นาท เสาวดี และ ธนูสิทธิ์ บุรินทร์ประโคน

Effect of structural parameters such as well-width, potential energy depth and volume fraction of quantum wells embedded in a p-type semiconductor on the recombination rates of electron and hole has been investigated. Electron wave functions are obtained by the shooting method. The overlap integral of electron and hole is calculated. The recombination rate is proportional to the square of the overlap integral of electron and hole. The results show that the recombination rate in the structure of symmetric quantum wells embedded in a p-type semiconductor decreases significantly. For the structure which has the volume fraction less than 5%, the recombination rate decreases while the well width and the potential energy depth increase. In addition, the results state that the structure with appropriate structural parameters of the quantum wells can reduces the recombination rate up to 65%.


P.636-645

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Grapheme to Phoneme Transcription for Pali-Thai

การแปลงข้อความภาษาบาลีอักษรไทยเป็นสัทอักษร

วินัย มาลีลัย และ พุธษดี ศิริแสงตระกูล

This paper presents a method for Pali phoneme transcription using a hybrid of dictionary and linguistic rules. In the study, we constructed a Pali-Thai dictionary, which gathered Pali words from the dictionary book of Phramahapriroch. The dictionary consists of almost 14,323 Pali words. The dictionary structure contains Pali words, meanings, word type, corresponding Thai words, romanize words, as well as phoneme. The input of the developed system is Pali language in paragraph level. The input sentence was segmented into sequence of words using the longest matching algorithm in order to look for Pali word and phoneme from the dictionary. Words that do not appear in the dictionary are transcribed using the Pali grammarand linguistic rules. In order to evaluate the efficiency of the proposed system, the developed system was used to transcribe Pali documents. The testing documents are 99 prayers, 181 proverbs and Tipitaka Volume 1 of siamrath. The transcription result shows that the accuracy the transcription was 98.75%.


P.646-657

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Place Recommendation System Using Demographic Data Analysis Principle from Social Network

ระบบแนะนำสถานที่โดยการประยุกต์ใช้ หลักการวิเคราะห์ข้อมูลโพรไฟล์ประชากรจากเครือข่ายสังคม

ชริญา แย้มอดุลย์ นครทิพย์ พร้อมพูล และ อรรถสิทธิ์ สุรฤกษ์

The objective of this master project is to present rule and tool for place recommendation system using population demographic information from Facebook using Naïve Bayes classification. The demographic information is composed of 7 items; gender, age, relationship, education, occupation status, hometown and current address. The recommended places were classified into 4 types: restaurant, hotel, outdoor visiting place, and department store and retail store. Moreover, the subcategories of each category were defined. The frequency of place visiting based on user check-in information was used to identify each user group for training data. The total frequency of check-in transaction was 35,084 items from 600 Facebook’s users. The effectiveness of the proposed rule was used accuracy metric. The accuracy values of rule for recommended places; the restaurant, hotel, outdoor visiting place, and department and retail store; were 78.7, 72.5, 67.4 and 76.7% respectively. The developed tool based on the proposed rule could be used to search the recommended places using user profiles. In addition, this tool provided the updating function to adjust the check-in information of the target sample users in order to improving the training data set. This would enhance the recommendationsystem in term of the up-to-date information and user interest.


P.658-669

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Reduce the Complexity of Estimation a 2D Horizontal Directional Sound Using Cross-correlation Method for the Recognition of Robot Voice Directions

การลดความซับซ้อนของการประมาณค่าทิศทางเสียงแบบ 2 มิติในแนวนอน โดยใช้วิธีสหสัมพันธ์แบบไขว้ สำหรับการรับรู้ทิศทางเสียงของหุ่นยนต์

อรรถชัย คนยัง สายยัญ สายยศ และ พิเชษ วะยะลุน

Developing robots ability to be able to act similar to human being most for being substituted from human being in the risky and dangerous work in the future. Perceiving sound source origin is important to help robots move toward to the origin of sound. In addition, this idea can be applied as the leading system for the hearing disability people. Therefore, this research proposes Cross-correlation method to estimate the direction of sound from two microphones to be presented as human begins left ear and right ear with the qualifications of the transfer function which is related to the head (Head-Related Transfer Function: HRTF) and reduces the complexity of the sound direction estimation with the application of polynomial regressions. To estimated the tendency of correlation of sound direction in real time is faster. The method that has presented shown the approximation error as root mean square only 0.96 degrees.


P.670-680

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Quality Model for Analyzability Evaluation Of Java Class

โมเดลประเมินคุณภาพด้านความสามารถในการวิเคราะห์เพื่อหาข้อผิดพลาด สำหรับโค้ดจาวาระดับคลาส

จุฑามาส สงวนจิตร ทรงศักดิ์ รองวิริยะพานิช และ พนิตา เมนะเนตร

We propose a quality model for evaluating the analyzability of java class. Our model determines how difficult to understand the code in order to identify cause and error locations. To create this prediction model, we survey software metrics likely to have an impact on class’s analyzability. We applied the ordinal logistic regression method to identify a set of metrics correlated with the analyzability level divided into 3 levels: poor, fair and excellent. To validate our model, we tested it at 95% confidence level using a set of 37 java classes from jEdit open source program. We found that only Coupling between Object (CBO) and Lack of Cohesion in Methods (LCOM) metrics influence class analyzability.


P.681-692

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Obstacle Detection for Unmanned Aerial Vehicle Movement by Using 3D Stereoscopic

ระบบตรวจจับสิ่งกีดขวางสำหรับการเคลื่อนที่อากาศยานแบบไร้คนขับ โดยใช้ภาพสามมิติแบบสเตอริโอสโคปิก

สุทธินันท์ ลุนเพ็ง สายยัญ สายยศ และ พิเชษ วะยะลุน

Obstacle is a hindrance to the unmanned aerial vehicle movement in various situations. The terrain has obstacle difficult movement effect, or the movement may be clash with obstacles. So the accuracy of the obstacle detection is very important for unmanned aerial vehicle movement. This paper proposes an obstacle detection system for unmanned aerial vehicle movement using correlation techniques of 3D Stereoscopic to examine the relationship of 3D images. The proposed system consists of two processes which are the obstacles detection in the movement vision, and objects avoidance by analysis of the correlation of 3D images. Thecorrelation can analyze an obstacle of the movement. The system performances are evaluated by using 3D stereoscopic images input to the system to analyze it. The experiments results showed that accuracy of the detected obstacles in the movement vision is 83.33 %, and objectsavoidance in the movement vision is 85.71 %.


P.693-699

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Gold Price Forecasting Based on the Improved GM(1,1) Model with Markov Chain by Average of Middle Point

การพยากรณ์ราคาทองคำโดยการปรับปรุงตัวแบบ GM (1,1) ด้วยลูกโซ่มาร์คอฟโดยใช้ค่าเฉลี่ยของจุดกึ่งกลาง

SoPheap Sous, Thotsaphon Thongjunthug and Watcharin Klongdee

In this paper, we combine Markov chain and GM(1,1) model, which will be called MCGM(1,1), to forecast the gold price in London. The transition probabilities of Markov chain are constructed by the error of GM(1,1) and original data from January 1990 to December 2011. We compare the accuracy of the prediction using the testing data from January 2012 to June 2014. We find that MCGM(1,1) is better than GM(1,1) in terms of three criterions, namely, mean square error, absolute mean error and absolute relative error.


P.485-498

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Morphometrics in Zoology: Basic of Morphometrics

มอร์โฟเมทริกส์ในงานด้านสัตววิทยา: พื้นฐานของมอร์โฟเมทริกส์

พรพิมล เจียระนัยปรีเปรม

Morphometrics is the empirical fusion of mathematics and statistics study involving the metrical and statistical properties of shape and interested objects’ shape changing. In biological science studies, morphometric approaches are used to characterize biological relevant forms and patterns of organisms in ways that allow quantitative description and analysis, and interpretation of their morphology and morphological variation. Morphometrics has broad and deep contexts, thus the recent article aims to present the basic principle of morphometric analysis and ideas of morphometric analysis applications in zoological science.


P.499-513

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Temperature-Responsive Polymers for Biomedical Applications

พอลิเมอร์ที่ตอบสนองต่ออุณหภูมิเพื่อการประยุกต์ทางชีวการแพทย์

ณัฐวิศิษฏ์ ยะสารวรรณ

Temperature-responsive polymers play important roles in biomedical and biotechnological development as materials for applications in tissue engineering. The change of temperature induces the formation of polymeric networks which can serve as tissue scaffolds towhich cultured cells can adhere. In addition, the polymeric networks and micelles can be used as drug carriers which deliver required drugs to specific target organs. By using drug carriers, the release rate of drugs can be optimally controlled, allowing effective drug activities. This article reviews essential theoretical background, related researches and interesting applications of temperature-responsive polymers reported to date.


P.514-522

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List Coloring Problems

ปัญหาการระบายสีรายการ

วงศกร เจริญพานิชเสรี และ พวงรัตน์ ฉันทวีโรจน์

A list assignment L of a graph G is a function which assigns a set of colors to all vertices and G is called L-colorable if each vertex v can be colored by using color from L(v) and adjacent vertices receive distinct colors. In this article, definitions related to list assignment problems are introduced. Then some research of list assignment problems is proposed; for example, a characterization of 2-choosable graphs, a characterization of 3-choosable complete bipartite graphs and a list assignment such that prevents K7,7 and K7,8 from being 3-choosable. Finally, topics of possible future research are presented.


P.523-531

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Maximum likelihood Estimation for the Linear Exponential Distribution Using Grouped Data

การประมาณค่าด้วยวิธีความควรจะเป็นสูงสุดสำหรับ การแจกแจงเลขชี้กำลังเชิงเส้นด้วยข้อมูลแบ่งกลุ่ม

คณิศา โชติจันทึก

Using statistical distribution functions to explain data behavior is the scientific process accepted all around the world. They could show tendency and information of data used in decision making to apply in any area. Estimation of parameters for statistical distribution functions are seen as a crucial preliminary process. However, it is found that data observing in some situations could not be completely collected especially in the situation rested on linear exponential distribution because they depended on time that is very difficult to observe. A technique used to solve this problem is collecting the grouped data. This paper presents using maximum likelihood method to estimate parameters for linear exponential distribution by observing grouped data. The result from this study is a fundamental alternative technique to explain data corresponded with linear exponentialdistribution using grouped data.


P.532-543

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A Comparison of Forecasting Methods between Box-Jenkins and Holt’s Exponential Smoothing Methods for Predicting the Retail Prices of Hip Meat

การเปรียบเทียบวิธีการพยากรณ์ระหว่างวิธีบอกซ์-เจนกินส์ และวิธีการปรับเรียบด้วยเส้นโค้งเลขชี้กำลังของโฮลต์ สำหรับการพยากรณ์ราคาขายปลีกสุกรชำแหละ เนื้อแดง สะโพก

วรางคณา กีรติวิบูลย์

The purpose of this research is to compare two forecasting methods which are Box- Jenkins method and Holt’s exponential smoothing method for predicting the retail prices of hip meat. Time series that used is the monthly data from the website of Department of Internal Trade of Thailand during January 2004 to June 2013 (114 values). The data are split into two sets, the first 102 values from January 2004 until June 2012 for the modeling and the last 12 values from July 2012 until June 2013 for finding the most suitable forecasting method by the criteria of the lowest mean absolute percentage error and mean squared error. The results show that Holt’s exponential smoothing method is suitable for this time series than Box-Jenkins method. The forecasting model that constructed from the total time series data 114 values is   t m ˆY 132.49997 0.39578 m    where m represents the number of months to forecast ahead with the predictive value start at July 2013 (m = 1).


P.544-550

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Prevalence of Trematode Metacercariae in Cyprinoid Fish from Mae Lao District in Chiang Rai Province

ความชุกของตัวอ่อนพยาธิใบไม้ระยะเมตาเซอร์คาเรีย ในปลาวงศ์ปลาตะเพียน อำเภอแม่ลาว จังหวัดเชียงราย

พิสิษฐ์ สุนทราวิฑูร เก่ง เจียมกิจวัฒนา และ งามนิตย์ ราชกิจ

A study of prevalence rate of trematode metacercariae was determined in cyprinoid fish collected from local markets, Mae Lao District, Chiang Rai Province from January to April 2013. A total of 267 freshwater fish of 7 species were examined by dissection and compression techniques. The overall prevalence rate of metacercariae in cyprinoid fish was 71.2% (190/267), predominantly in Mystacoleucus marginatus (100%), Henicorhynchus siamensis (84.8%),Labiobarbus siamensis (77.4%), Barbonymus gonionotus (62.8%), Barbonymus schwanenfeldii(48.3%), Osteochilus vittatus (26.7%) and Thynnichthys thynnoides (0.0%), respectively. Haplorchis taichui metacercariae was found in the highest number followed by Haplorchoides spp. and unidentified species of metacercariae, respectively. The highest intensity of Haplorchis taichui metacercariae infection in Henicorhynchus siamensis was 28.9. These results indicate that eating raw freshwater fish represents a high risk for acquiring fishborne zoonotic trematode infection in Chiang Rai Province.


P.551-560

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Effect of Modified Atmosphere Packaging on the Physical and Microbiological Properties of Shucked Fresh Oyster

ผลของการบรรจุแบบปรับสภาพบรรยากาศต่อคุณภาพทางกายภาพ และจุลชีววิทยาของหอยนางรมสดแกะเปลือก

สวามินี ธีระวุฒิ รัตนาภรณ์ พิมพ์แน่น และ โสภาวดี เมืองฮาม

The purpose of this study was to investigate effect of modified atmosphere packaging on the physical and microbiological properties of shucked fresh oyster (Saccostrea cucullata) in mixed solution (3% potassium sorbate and 2.5% sodium lactate). The shucked fresh oysters were packed in five different treatment conditions (T1 – T5) which T1 (40%CO2:20%O2:40%N2),T2 (40%CO2:30%O2:30%N2), T3 (60%CO2:20%O2:20%N2), T4 (60%CO2:40%O2) and T5 (atmospheric air), respectively and stored at 4±1 ºC. The results showed that the shucked fresh oysters which were packed under T3 condition had the lowest changes refer the criteria of physical and microbiological properties.The shucked fresh oyster packed in T3 had shelf–life of storage for 10 days (total plate count not exceeded log 6 cfu/g). The shucked fresh oyster packed in T4, T2 and T1 were 9, 7 and 6 days, respectively compared with shucked fresh oyster kept in T5 (atmospheric air) which had the shortest shelf–life only 5 days.


P.561-570

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Antibiogram of Bacteria Isolated from Public Toilets

รูปแบบการดื้อต่อยาปฏิชีวนะของแบคทีเรียที่แยกได้จากสุขาสาธารณะ

กิจจา จิตรภิรมย์ และ วชิระ สิงหะคเชนทร์

Evaluations of antibiotic resistant bacterial contamination in the public toilet in large retail supermarkets, Bangkok by swab method and antibiotic susceptibility was determined by the agar diffusion technique. A total of 186 isolates were colifrom bacteria as Escherichia coli, Klebsiella pneumoniae, Citrobacter spp and Enterobacter spp. among them, 110, 20, 5 and 3 isolates, and also, 48 Staphylococcus as S. aureus and Staphylococcus spp. are 13 and 35 isolates, respectively. The colifrom bacteria were detected of antibiotic susceptibility with 5 antibiotics; Ampicillin (AMP), Nalidixic acid (NA), Ciprofloxacin (CIP), Gentamicin (CN) and Trimethoprim-sulfamethoxazole (SXT) and Staphylococcus were detected of antibiotic susceptibility with 2 antibiotics; Oxacillin (OX) and Vancomycin (VA). Results, The most colifrom bacteria are resistance to AMP (55.8%) and susceptible to CN (97.8%). Four main groups of antibiogram were found. Resistance to 1 (50.7%) and 2 (4.4%) antibiotics was observed and multidrug resistant colifrom bacteria were showed 3.6 % and they were sensitive to all 5 antibiotic as percentage of 41.3. All of 48 Staphylococcus were sensitive to VA and 8 isolates (16.7%) were resistance to OX. Only 2 (15.4%) from the total of 13 S. aureus belong to Methicillin–resistant Staphylococcus aureus. This study indicated that the risk of antibiotic resistance bacterial infection for the use of public toilets. Therefore, it is important to have relevant knowledge management of public toilets to control the spread of these bacteria.


P.571-578

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Bryophytes of Khao Kheow Open Zoo, Chonburi Province

ไบรโอไฟต์ในสวนสัตว์เปิดเขาเขียว จังหวัดชลบุรี

Phiangphak Sukkharak, Pacharapol Pearaksa, Athipong Sarawan and Si He

An investigation of bryophyte diversity of 1.5 km nature trail, Khao Kan Rom area, Khao Je Dee area, and forest behind research centre in Khao Kheow open zoo was carried out from October 2012 to August 2013. From 265 enumerated specimens, 24 species (16 mosses, 8 liverworts) in 16 genera (10 mosses, 6 liverworts) and 13 families (9 mosses, 4 liverworts) were found. Among these the most common family of mosses was Fissidentaceae (6 species) and family of liverworts was Lejeuneaceae (5 species). In addition, of all bryophyte species found, Lejeunea anisophylla Mont. was the most common. The highest species richness of bryophytes among the four areas was found in 1.5 km nature trail.


P.579-588

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The Analysis of Carbon Footprint in House Construction: Case Study of a 300 m2- Residence House

การวิเคราะห์คาร์บอนฟุตพริ้นท์จากการสร้างบ้านพักอาศัย: กรณีศึกษาบ้านพักอาศัยขนาด 300 ตารางเมตร

ธิบดินทร์ แสงสว่าง ทศพล สุขจิตร์ และ ธีระชัย สุรโชติเวศย์

The research is to analyze the carbon footprint which is greenhouse gases development in the form of ton of carbondioxide equivalence and proposing the guideline for the materials selection of house construction. The case study is a 300 m2 of residence house in Ayutthaya province, Thailand. The results show that the total greenhouse gases of 241.43 ton CO2e are released from the house materials and construction activities. There are 4 resources; structure for 118.31 ton CO2e, house body for 124.12 ton CO2e, water supply and electricity installation for 0.81 ton CO2e and construction activities for 1.09 ton CO2e. The maximum greenhouse gases come from concrete. The model house is established and changed from concrete into teak. There is 104.08 ton CO2e reduced from the original house and equivalent to 5.8 Rai of teak within 10 years of CO2 absorption.