 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Quantitative Methods for Analysis of Factors Influencing Farmers’ Adoption of Technology.) ผู้เขียน: Aree Wiboonpongse สื่อสิ่งพิมพ์:pdf Abstract A study on factors influencing the adoption of farm innovation aims at understanding of farmers’ socio-economic characteristics, which affect farmers adoption. This paper reviews quantitative methods employed in the recent studies of adoption determinants and compares empirical results of the 6 methods applied to adoption of grass strip in integrated soil water conservation cropping systems in Mae Hong Son highlands, include ; (i) Spearman rank correlation (ii) chi-square test (iii) A model with grass strip area as dependent variable using the least square (LS) technique (iv) A logit model of grass strip ratio to total land holding of adopters with LS technique (v) A binary dependent model using LS technique and (vi) Finally Logit model for the binary dependent variable with maximum likelihood estimation. Since the tests of the independence of nonparametric methods rest on the impact of a given factor and ignore the influence of the others, their results are not all consistent with obtained by parametric methods. The techniques applied to models (iii), (iv) and (vi) are considered appropriate as the tests indicated that the specified models explain correctly. Nevertheless, the choice of the model depends on the information available for the dependent variable and its implication. The method (v) is not acceptable theoretically as the predicted value possibly goes beyond 0 and 1 and moreover, accuracy of prediction is only 77% as compare to 90% obtained from likelihood estimation. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The Evaluation of the Farmers Participated in the Short-Course Trainings on the Beef-Cattle Improvement, Carried Out by The Rural Studies Center, Kasetsart University Resear ผู้เขียน: นายสิทธิชัย เกษตรเกษม, ผู้ช่วยศาสตราจารย์ , วัชรี เลิศมงคล, ดร.เอมอร อังสุรัตน์, รองศาสตราจารย์ , ดร.จุฬารัตน์ วัฒนะ, ผู้ช่วยศาสตราจารย์ , Somsri Pattratham, นายศิริศักดิ์ พราหมณ์โสภี, อาจารย์ , นายพจน์ บุญเรือง, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf Abstract The objectives of this study were to evaluate the knowledge and desirableness of the farmers participated in the short-course training on the Beef-Cattle Improvement carried out by The Rural Studies Center, Kasetsart University Research and Development Institute in 1993. The Population was consisted of total 60 farmer participants or the training program offered to farmers residence in deforested area in Kaeng-Krajan subdistrict, Petchaburi province. The data were collected by questionnaire. Statistical proce-dures used in analyzing the data included percentage, arithmetic means and chi-square. The results reveal felt needs in the following aspects. 1) The duration of the training program should be longer and emphasize more on practice in the residential area. 2) Training course should be arranged in agro-silvo-pastoral system 3) The formulation of occupational group including handicraft and small industries should be promoted to reduce migration and deforestration. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The Impact of Business Cycle on the Monetary Activities in Thailand.) ผู้เขียน:นางวาสนา สิงหโกวินท์, รองศาสตราจารย์, นางวิไลลักษณ์ ไทยอุตส่าห์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf Abstract The business cycle is a phenomenal event which always takes place in the economic system. Each phase of business cycle can cause many economic variables to change. Thus, the aggregated economy is also affected by the business cycle fluctuation. The objectives of this study aimed at analyzing the impact of business cycle in Thailand on monetary activities which are the important economic variables. Multiple linear regression was the method used to analyse the relationship between business cycle and the monetary activities. According to some business cycle theories, gross domestic product was considered as a business cycle indicator on the aggregated supply side, and real aggregated expenditure, gross domestic investment, real capital formation were also considered as business cycle indicators on the demand side. The value of the variables would indicate the business cycle phase in which high value of those variables means the economy is in a prosperous phase and low value means the depression one. At the same time, consumer price index, interest rate, money supply, financial institution credit, balance of payment and stock price index in the securities market of Thailand were other variables for monetary activities in the economic system. The results showed that the business cycle indicators on the demand side had strong influence on those monetary activities. That is, higher gross domestic investment will lead to higher consumer price index, interest rate, financial institution credit and stock price index. On the opposite side, higher aggregated expenditure will lead to the worst balance of payment. While higher capital formation caused money supply in the economy for the following year to increase. Hence, it may be possible to establish the direction paths of those monetary activities during each phase of business cycle if we could control the activities of the above mentioned business cycle indicators. |
 ที่มา:Kasetsart Journal (Natural Science)(วารสารวิทยาสารเกษตรศาสตร์ สาขาวิทยาศาสตร์)หัวเรื่อง:Electricity Generation from Producer Gas in Cambodia:Implementation |
ที่มา:Kasetsart Journal (Natural Science)(วารสารวิทยาสารเกษตรศาสตร์ สาขาวิทยาศาสตร์)หัวเรื่อง:Effects of Horm Mali brown rice flour extract on Aspergillus niger growth |
ที่มา:Kasetsart Journal (Natural Science)(วารสารวิทยาสารเกษตรศาสตร์ สาขาวิทยาศาสตร์)หัวเรื่อง:การศึกษาเปรียบเทียบวิธีการสกัดสารหอมจากดอกลั่นทม |
 หัวเรื่อง:การกระจายของแร่ดินเหนียวเคโอลิไนต์ อิลไลต์ และมอนต์มอริลโลไนต์ในขนาดอนุภาคดินเหนียวชนิดหยาบ และชนิดละเอียดของดินตะกอนน้ำพาบางชนิด ผู้เขียน:Kannica yoothong, Mitri Pukamphol, Ampawan Hutspardol สื่อสิ่งพิมพ์:pdf Abstract Seven selected soil profiles of alluvial soils from various parts of Thailand were used in the study of the distribution of clay minerals – kaolinite, illite and montmorillonite in coarse and the find clay fractions. The clay fraction of soils was first separated into coarse and fine fractions between 2.0 to 0.2 micron and smaller than 0.2 micron, respectively. The mineralogical composition of both fractions was determined by X-ray diffraction technique. The results reveal that the clay mineralogy of the alluvial soils consists mainly of kaolinite, montmorillonite and illite with kaolinite yielding the biggest proportion in most of the soils studied. Interstratified clay minerals, vermiculite, chlorite, goethite and quartz are also present in small quantities in some soil series. The distribution of kaolinite in the two fractions are nearly the same, slightly more in the coarse clay fraction (2.0 to 0.2 micron) in some soils, however slightly more in the fine clay fraction (<0.2 micron) is also observed. Montmorillonite is found in both fractions of most soils, more in the fine clay fraction than in the coarse clay fraction. Illite segregates largely in th coarse clay fraction and is found in the fine clay fraction in minor amount or does not present in some soils. Other minerals from these alluvial soils such as vermiculite, quartz and chlorite are found only in the coarse clay fraction and the interstratified clay minerals and goethite are presented in both clay fractions. From the reasons that many minerals do not segregate largely in either coarse or fine clay fraction, in general practice, it is not necessary to separate the clay fraction into coarse and fine fractions prior to X-ray diffraction examination of minerals. Separation of the clay fraction < 2 micron is satisfactory. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Suitable Planting Materials for the Growth of Pe-Tsai Chinese Cabbage (Brassica pekinensis) And Balsam (Balsamina hortensis) ) ผู้เขียน:Siriporn Leelasithorn, ดร.ศุภมาศ พนิชศักดิ์พัฒนา, ศาสตราจารย์เกียรติคุณ สื่อสิ่งพิมพ์:pdf AbstractPlanning materials, using coconut dust: coarse sand: clayey soil (Rangsit soil series) at the ratio of 3:1:2 , 3:1:1 and 3:1:0:5 by volume, and combinations of chemical fertilizer (15-15-15) at the rate of 0, 10 and 20 g/pot and castor meal 0, 25 and 50 g/pot were tested for the optimum growth of Chinese cabbage and balsam grown in 12 litre pot (or so-called in the market as 12-inch in diameter pot size). The experimental results showed that the 3:1:1 and 3:1:0:5 planting materials were suitable for the growth of Chinese cabbage and balsam. In Chinese cabbage, 3:1:1 planting material applied with 50 g or 25 g of castor meal/pot combined with 20 g chemical fertilizer/pot were shown to be among the best mixture. The alternative of the above combination could be 3:1:0:5 planting material applied with castor meal and chemical fertilizer at the rate of 50 g and 20 g/pot respectively. In balsam, 3:1:1 planting materials applied with 50 g of castor meal/pot and 10 g of chemical fertilizer/pot gave the highest growth. Second to this combination was 3:1:0.5 planting materials applied with 50 g of castor meal/pot together with 10 or 20 g of chemical fertilizer/pot. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Production of Dry Inoculum for Vinegar Fermentation) ผู้เขียน:Banjongjit Mahintratep, Rossukon Laopaiboon, นางนภา โล่ห์ทอง, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractAttempts were made to produce vinedry inoculum (loogpang) using pure culture of acetic acid bacteria. Basing on its capability in producing high acid, toleration to high temperature and having good longevity, Acetobacter sp. 249-1 was employed in this study. Inhibitory effect of 29 medicinal plants. Was tested against the selected strain and microorganisms normally found contaminated during the preparation of the dry inoculum. Mixture of 3% white pepper, 3% mace and 1% nutmeg was found the most appropriate preservative. While having no inhibitory effect on Acetobacter spp., the mixture was very effective against other microorganisms tested. Comparison of several preparation procedures, indicated that good dry inoculum was obtained by mixing the mentioned spice mixture.With 100 g rice flour, 80-85 ml coconut water and ca. 10 cells/g Acetobacter sp. 249-1 and incubated at room temperature for 48 hours. In terms of viability and longevity of the microorganism, oven dry of the dough at 40 C for 24 hours was found superior over sun dry for 6 hours. The so prepared inoculum remained active upon strorage at room temperature for 3 months, or in the refrigerator for at least six months. Inoculum pbtained by addition of 0.2% propionic acid had shorter shelf life at room temperature. However, in the presence of the acid, dough mixing could be made with less care. Vinegar containing 6.5-7% acid was obtained when 0.2% dry inoculum was inoculated in alcoholic mash containing 8% ethanol. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Morphological, ultrastructural and pathological studies of the nuclear polyhedrosis virus of Spodoptera exigua.) ผู้เขียน:ดร.ทิพย์วดี อรรถธรรม, ศาสตราจารย์ , Sirinun Aemprapa สื่อสิ่งพิมพ์:pdf AbstractNuclear polyhedrosis virus (NPV) of the beet armyworm, Spodoptera exigua found in Thailand, was multiple-embeded type. Polyhedra varied greatly in shape and size. Mature polyhedra often angular in shape measured 1.4 m. in diameter. Polyhedra with cavities, protrusions and rough surface structure were frequently observed. In addition unusually huge globular polyhedra and adherent polyhedra not previously described were present in the nuclei of infected fat cells. Virions, contained 2-6 virus particles, measured 132 x 365 nm. Rodshaped nucleocapsids or virus particles with the average size of 51 x 325 nm, commonly occurred in bundles outside polyhedra. Histopathological studies revealed that heavily infections occurred in the nuclei of the fat body, hypodermis, and tracheal matrix cells. Mid gut epithelium, malpighian tubules and the epithelium and connective tissues associated with tests were apparently susceptible for virus replication. Infection process of the virus was characteristically similar to those of other nuclear polyhedrosis virus in Lepidopterous hosts. Electron microscope investigations revealed some cytopathologic changes directed by the virus in the nuclei of infected cells. Fibrillar strand, as the prominent masses, occurred in most nuclei. Curved and curled membranes known as membranous profiles are commonly found associated with fibrillar strand and virogenic stroma. Thick electron dense filamentous membranes were also observed in this study. Results from this study would suggest that the NPV of exigua was different from the NPV of Heliothis armigera, Trichoplusiani and Bombyx mori found in Thailand. This virus was highly effective and promising to be developed as microbial agent for pest control programs. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Waterstress on Total Nonstructural Carbohydrates, Total Nitrogen Contents in Leaves and Stem Apexes of Tangerine (Citrus reticulata Blanco cv. Khiew-Waan)) ผู้เขียน:Pornpun kitinunprakorn, ดร.สุรนันต์ สุภัทรพันธุ์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe effect of waterstress on total nonstructural carbohydrates, total nitrogen contents in leaves and stem apexes- of tangerine (Citrus reticulata Blanco cv. Khiew-Wann) was studied at Tumbol Bung Ba, Nong Sua, Patum-Thani Province and at the Physiological laboratory, Horticulture Department, Faculty of Agriculture, Kasetsart University, during January 1985 to August 1986. The results showed that the plants under the waterstress conditions tended to contain higher total nonstructural carbohydrate contents in leaves and stem apexes than those under the normal irrigation. The lowest content of total nonstructural carbohydrate was found during the flushing period of the plants. Total nitrogen contents in leaves and stem apexes under the waterstress conditions the total nitrogen content in leaves was higher than that in the stem spexes. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Chemistry Teachers? Teaching Practices: Case Studies) ผู้เขียน:Pranom JAPIN, ดร.วรรณทิพา รอดแรงค้า, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThis research is qualitative research using case studies as a research method to examine the teaching practices of chemistry teachers. The participants were three chemistry teachers who were taught at different secondary schools under the Bangkok Educational Service Area, Office 2. The data were collected by using classroom observations, semi-structured interviews, and lesson plan analysis. The data were analyzed by using analytic induction and organized into five themes common to the teachers? teaching practices. These themes are: reviewing related concepts to assist students in understanding current concepts, having students get involved in the learning processes so as to deepen their own understanding of the material being taught, emphasizing group work, assessing students? understanding through various methods, and having the teacher act as facilitator. Regarding constructivist teaching practices, the three teachers are both similar and different in terms of their exposure to those practices. However, they all still adhere to a traditional approach to teaching. This research recommends they be helped with the development of both their understanding and their teaching practices based on a constructivist approach. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Purification of Citrus Tristeza Virus) ผู้เขียน:ดร.สุพัฒน์ อรรถธรรม, ศาสตราจารย์ , Pattana Srifa, ดร.อำไพวรรณ ภราดร์นุวัฒน์, รองศาสตราจารย์ , นายธีระ สูตะบุตร, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractCitrus tristeza virus (CTV) was purified from bark tissues of infected lime plants. The purification procedure consisted of extraction of powdered bark tissues, filtration, and virus precipitation by polyethylene glycol. A short Cs2SO4-sucrose cushion step gradient was introduced to further purify the virus. The yield of purified virus was 4 mg/100 g bark tissue. Purified virus suspension composed of abundant threadlike particled and exhibited a UV-absorption spectrum of a nucleoprotein with a A 260/280 of 1.23. The CTV antiserum was effective for virus detection in immune-electron microscopic tests. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Factors Influencing University Selection of Grade 12 Students in the Upper Northeastern Region of Thailand) ผู้เขียน:Kanyarat Sukhawatthanakun, นางสาวธัญลักษณ์ (ซ้ำปี 2548) เมืองโคตร, อาจารย์, ดร.ขวัญชนก ห่านนิมิตกุลชัย, ผู้ช่วยศาสตราจารย์ , Worravit Kultangwattana, Kriangkrai Promnanuritte สื่อสิ่งพิมพ์:pdf AbstractThe research objectives were (1) to study influential factors in university selection, and (2) to study the behavior of Grade 12 students in the upper northeastern region of Thailand on university selection. Research results were drawn from 1,600 students, the majority of them were female (77.90%). The age of the students was 18 years old. Most of them studied at high schools in Udon Thani province, had the GPAX of 3.26-3.50, and majority of them studied in sciences-mathematics program. The findings revealed that there were 5 decision factors in university selection. Firstly, the quality and reputation of institution factor, students paid highest interest in government universities. Secondly, the academic and management system factor, students paid high attention to the universities that promoted competent students to participate in academic competitions. Thirdly, the location and environment factor, students paid high attention to the universitieslocated in peaceful area and supportive environment for learning. Fourthly, the tuition fee and welfare factor, students paid highest attention to the universities that provided resourceful and sufficient library. Lastly, the motivation factor, students? motivation were based on future career opportunities. The students? behavior on selecting undergraduate institutions were; most of students searched for undergraduate institution information when they had studied at Grade 12, most students used internet as a tool to search for the information of the institutions, most students preferred consulting with their parents about university selection, but they made the final decision by themselves. In addition, they preferred studying in medical science program and most of them preferred studying at a university in Khon Kaen province. |
หัวเรื่อง:การใช้เทคนิคทางด้านนิวเคลียร์และวิธีการอื่นๆ เพื่อการคัดเลือกถั่วเขียวและเชื้อไรโซเบียมเพื่อการตรึงไนโตรเจนและเพิ่มผลผลิตถั่วเขียว ผู้เขียน:นายนันทกร บุญเกิด, อาจารย์, Precha Wadisirisuk, Achara Nantakit, Setha Siripin, Toshifumi Murakami สื่อสิ่งพิมพ์:pdf AbstractMungbean (Vigna radiata) is a nitrogen fixing crop. To be most useful to farmers the recommended mungbean should obtain nitrogen from atmosphere through symbiotic fixation with rhizobia. The objective of this study was to select mungbean lines and rhizobial strains for high nitrogen fixation. Results obtained from screening of 423 mungbean lines indicated that there were variation in nitrogen fixation, nodulation nitrogenase activity and growth of mungbean lines. The mungbean lines VA 1948, VC 1776, VC 3128, VC 1830, VC 1693 and VC 2335 were higher in nitrogen fixation than the recommended cultivars. Using 15N natural abundance technique to quantify the amount of nitrogen fixed found that mungbean line fixed nitrogen ranging from 0-300 mg N per plant for 35 days. It was interesting to find that the hybrid line F7 of VC 2768 A/1560 D which was the highest fixing line could fix N up to 19.2 kg per rai, resulted in the farmer could get more profit of 235-300 baht when using this line. In estimating seasonal fixing of nitrogen, it was found that mungbean start fixing N in small amount at early stage and gradually increased until reach maximum at pod filling stage or about 41?45 days and the N fixed was gradually declined until stop fixing at maturity. Investigating of rhizobial strains infecting mungbean cultivars revealed that some strains were specific to a mungbean cultivar. However most mungbean rhizobia were effective. There were high correlation among nodule number, nodule mass, ARA and plant biomass. To quantify nitrogen fixation in mungbean under field condition it is necessary to find a suitable reference or non fixing crop. It was found that sorghum was the most suitable reference plant for measuring N2 fixation in mungbean. Under normal field condition the selected mungbean line could fix N upto 70%. |
หัวเรื่อง:การใช้กากมันสำปะหลังจากการผลิตแอลกอฮอล์ในอาหารไก่ไข่ ผู้เขียน:Wirachai Polrome, Usa Klinhom, Chusri Talabmook สื่อสิ่งพิมพ์:pdf AbstractThe experiment was conducted to determine the effect of utilization of ethanol fermented cassava products (EFCP) with yeast cake in laying hen rations on performance and quality of products of laying hen (ISABROWN). EFCP was replaced for corn at levels of 0, 10, 20,30 and 40 percent of layer diets. Studying nutrient utilization of EFCP of laying hens by usnig completely randomized design and linear regression. The apparent metabolizable energy (AME) and apparent net protein utilization (ANPU) of the EFCP were 2229.85 Kcal/kg and 24.93 percent respectively. About the effects of EFCP on performance and quality products of laying hens, it was found that there was no significantly different in production performance between the controlled group and the groups fed with EFCP in the rations (P>0.05). But the cost of the EFCP rations was lower than that of the controlled group. As for the quality of eggs, there was no significant difference in weight of eggs, thickness of egg shell and haugh unit value of eggs between controlled group and the group fed with EFCP in the rations (P>0.05). Yolk colour of the EFCP fed groups was lighter than that of the controlled group (P<0.05). |
หัวเรื่อง:การเร่งอายุเมล็ดพันธุ์ถั่วเขียวเพื่อประเมินอายุการเก็บรักษาในเขตร้อนชื้น ผู้เขียน:Wullop Santipracha, Quanchit Santipracha, Chusri Narongrach สื่อสิ่งพิมพ์:pdf AbstractSeeds of three mungbean varieties, PSU 1, Uthong 1 and KPS 1 Were accelerated aged in 100% RH at 43, 45 and 47 ?C for 48, 72 and 96 hr. Seed quality from each temperature and time of accelerated aging were correlated to the seed stored in paper bags at room temperature for one year to evaluate seed longevity in the humid tropics. Seed accelerated aging could not overcome all of the hard seeds but lower seed viability and vigor. The accelerated aging of mungbean seed for longevity evaluation in the humid tropics in 43 ?C for 96 hr in 100% RH. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Microbial Ecology in Submerged Soils as Revealed by Using TTC (Triphenyl Tetrazolium Chloride), Part 1 : An observation Approach) ผู้เขียน:Pongsiri Patcharapreecha, Duangsamorn Taja สื่อสิ่งพิมพ์:pdf AbstractMicroorganisms associating with decomposition of rice straw and sesbania leaf in the submerged three Thai paddy soils (one sandy soil and two clayey soils) were examined under a micro-scope. The soils were added with water-soluble colorless TTC which was converted into water-insoluble red formazan when it was reduced by emzyme dehydrogenases of microorganisms so that the micro-habitats favorable for active microorganisms and some of the microorganisms themselves were easily recognized. In addition, sulfate reduction and methane formation could be also followed by observing blackened parts of the plant debris and the appearance of methane bubbles, respectively. Colonization of microorganisms on the plant debris started at cut ends, incisions and then extended to inside of plant debris. Decomposition pattern of rice straw was similar among three Thai soils, though its decomposition rate was somewhat lower for the sandy soil than that for the clayey soils. Decomposition of sesbania leaf was more different between the sandy soil and the clayey soils. A lag period in decomposition of sesbania leaf was recognized in the sandy soil but not in the clayey soils. The decomposition rate was clearly lower for the sandy soil than for the clayey soils. In the sandy soil, the number of protozoa were much less populated near sesbania leaf than near rice straw, though in clayey soils such facts were hardly found. Probably, some organic compounds contained in the sesbania leaf might inhibit the growth of protozoa, this effect being unclear in the clayey soils probably because these organic compounds were adsorbed by clay particles. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Passage of Pollens through Proventriculus in Honey Sacs of European Bee (Apis mellifera carnica L.)) ผู้เขียน:ดร.นิรันดร์ จันทวงศ์, รองศาสตราจารย์ , H. Pechhacker สื่อสิ่งพิมพ์:pdf AbstractDuring the transfer of pollen grains in sugar solution through the proventriculus, a selection of pollen grains took place according to their size and shape, which altered the relative proportions of the different pollen grains. After feeding, amounts of pollen grains in honey sac were remarkedly reduced. Pollens of rape (Brassica napus L.) which are small (about 25 micron) and have smooth exine could not be completely filtrated by the filiform –hair of the proventriculus. One hundred thirty five minutes after feeding, they remained in the honey sac. Pollens of pine (Pinus sylvestris L.) which have two air-sacs (wing) floated on the upper side of honey sac. Pollens of aster (Aster sp.) and dandelion (Taraxacum officinale Web.) are relatively bigger and more spiny than rape pollens. They could be easily filtered from the fluid in honey sac by the filifrom-hairs of the comb and passed into the midgut in 95 and 100 min., respectively. |
หัวเรื่อง:การศึกษาความสามารถของนักเรียนชั้นมัธยมศึกษาปีที่ ในการแก้สมการเชิงเส้นตัวแปรเดียวที่อยู่ในรูปแบบต่าง ๆ ผู้เขียน:ดร.สิริพร ทิพย์คง, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf Abstract The purposes of this research were to (1) study Matayomsuksa Two Students’ ability in solving linear equation with one variable in the different models ; (2) compare males and females students’ ability in solving linear equation with one variable in the different models ; and (3) compare the ability of the students in the large schools and the extra-large schools in solving linear equation with one variable in the different models. The subjects were 2033 Matayomsuksa Two Students in the public schools of the General Education Department under the Ministry of Education in Bangkok Metropolis. The instrument was a 30 item multiple-choice test. The data was analyzed for percentage mean, standard deviation, F-test, and pooled-variance t-test. The results showed that the mean and the standard deviation scores of the students in solving linear equation with one variable in the different models were 17.43 and 6.34, respectively. There was a significant difference between male and female students in solving linear equation with one variable in the different models at the .01 .level. However, the ability of the students in the large schools and the extra-large schools were not significantly different at the .05 level. |