• Progress in Medical Physics
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• v.21 no.1
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• pp.113-119
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• 2010

Software for GafChromic EBT2 film dosimetry was developed in this study. The software provides film calibration functions based on color channels, which are categorized depending on the colors red, green, blue, and gray. Evaluations of the correction effects for light scattering of a flat-bed scanner and thickness differences of the active layer are available. Dosimetric results from EBT2 films can be compared with those from the treatment planning system ECLIPSE or the two-dimensional ionization chamber array MatriXX. Dose verification using EBT2 films is implemented by carrying out the following procedures: file import, noise filtering, background correction and active layer correction, dose calculation, and evaluation. The relative and absolute background corrections are selectively applied. The calibration results and fitting equation for the sensitometric curve are exported to files. After two different types of dose matrixes are aligned through the interpolation of spatial pixel spacing, interactive translation, and rotation, profiles and isodose curves are compared. In addition, the gamma index and gamma histogram are analyzed according to the determined criteria of distance-to-agreement and dose difference. The performance evaluations were achieved by dose verification in the $60^{\circ}$-enhanced dynamic wedged field and intensity-modulated (IM) beams for prostate cancer. All pass ratios for the two types of tests showed more than 99% in the evaluation, and a gamma histogram with 3 mm and 3% criteria was used. The software was developed for use in routine periodic quality assurance and complex IM beam verification. It can also be used as a dedicated radiochromic film software tool for analyzing dose distribution.

• Korean Journal of Food Science and Technology
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• v.40 no.4
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• pp.375-381
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• 2008

This study developed the simultaneous analysis method for efficient safety controls of import food of Orange II, Rhodamine B, Para Red, and Sudan dye I-IV among disapproved coloring agents that use is prohibited in foods. The analysis method was developed according to the sample pre-treatment and HPLC conditions, and a documentary survey was used to establish the detection limit of the method, followed by effectiveness verification and recovery percentage examinations. Recovery percentage examination for 26 products resulted Orange II displayed recovery percentage of 96.46-121.26%, Rhodamine B displayed recovery percentage of 70.86-106.53%, Para Red displayed recovery percentage of 97.00-116.86%, Sudan I displayed recovery percentage of 92.93-112.44%, Sudan II displayed recovery percentage of 96.63-115.10%, Sudan III displayed recovery percentage of 92.21-114.73%, Sudan IV displayed recovery percentage of 93.22-122.91%. Correlation coefficient of gradient of this analysis method exhibited more than 0.999, RSD exhibited fewer than 2 as 0.8-1.39%, exactitude exhibited more than 90%. At this time, detection limit and fixed quantity limit decided by each 0.1 mg/L, 0.3 mg/L.

• Korean Journal of Clinical Laboratory Science
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• v.49 no.2
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• pp.135-140
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• 2017

Polymerase chain reaction (PCR) was used to detect cattle material from processed meat products. Seventy-eight different commercial processed meat products were purchased from several big food marts. Among them, 17 products contained cattle material (10 samples contained only cattle, 5 samples mixed with cattle and porcine, 2 samples mixed with cattle, porcine and chicken). The genomic DNA was extracted directly from the processed meat products, and strain-specific primer targeting the 16S ribosomal RNA mitochondrial gene was used. All PCR products were cloned into the pGEM-T easy vector and sequenced. Consequently, the PCR products were amplified from 10 processed meat products, which contained only cattle material in our conditions. Furthermore, PCR reactions showed the same results at mixed samples. The DNA sequence obtained from pGEM-T easy/PCR products showed more than 95% identity with Bos taurus 16S rRNA gene using homology analysis. In conclusion, we suggest that the method using PCR, as performed in this study, could be useful in detecting cattle material in processed meat products. Moreover, our system could be applicable in inspection procedures to improve the verification of correct labeling for import and export processed meat products.

• Proceedings of the Korea Port Economic Association Conference
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• 2007.07a
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• pp.391-405
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• 2007

The purpose of this paper is to verify the two problems(normalization for the different inputs and outputs data, and translation invariant for the negative data) which will be occurred in measuring the seaport DEA(data envelopment analysis) efficiency. The main result is as follow: Normalization and translation invariant in the BCC model for measuring the seaport efficiency by using 26 Korean seaport data in 1995 with two inputs(berthing capacity, cargo handling capacity) and three outputs(import cargo throughput, export cargo throughput, number of ship calls) was verified. The main policy implication of this paper is that the port management authority should collect the more specific data and publish these data on the inputs and outputs in the seaports with consideration of negative(ex. accident numbers in each seaport) and positive value for analyzing the efficiency by the scholars, because normalization and translation invariant in the data was verified.

• Korean Journal of Construction Engineering and Management
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• v.12 no.1
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• pp.115-124
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• 2011

The Construction New Excellent Technology was introduced to promote the development of domestic construction technology and enhance national competitiveness, by inspiring the development desire of technology developers in 1989. Domestic Construction New Excellent Technology is first introduced in 1989, the total 596 cases were assigned to the new technology and it was used the construction site. Also, it was achieved the quantitative performance of thirty-hundred applications and was effected to the domestic construction industry. However, the systematic analysis about the introduction effects of Construction New Excellent Technology are none. Therefore, the quantitative analysis of economic effects in construction industry have to a justification in according to operation of Construction New Excellent Technology system and verification of superiority. And then, the Construction New Excellent Technology system needs a developing base in the future. In this study, The Economic Impacts of Construction New Excellent Technology were analyzed in quantitatively such as a cost savings effects, the employment effects, the effects on Value-added, the import substitution effects due to use of Construction New Excellent Technology. This study will be used promotion of economics and superiority in the Construction New Excellent Technology.

• Journal of Korean Home Economics Education Association
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• v.4 no.1
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• pp.87-95
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• 1992

The purpose of this study is to suggest how we can get over the difficulties of practical drill under experimentation concerning the units of making clothes in the curriculum of home economics. The import of this study was based on the results of the preceding studies the field of the making Korean clothes, from the standpoint of the teaching tools and teaching materials by the use of VTR, is one of the most insufficient. On the one hand, the teaching procedure here a VTR, running 34 minutes or so, was made up with the process of making Korean men’s slacks, and was led by the researcher’s own. The contents of the lesson are as follows： the shape of Korean clothes, the name of each part, the process of drawing, cutting and sewing, and the items of evaluation and arrangement. On the other hand, the two comparative groups were made to compare one with the other： One group was taught by help of VTR media, and the other by the model performance and explanation of the instructor’s own. All of the statistical data were analyzed in terms of SPSS/PC, and t-verification was made, to make difference between the two, after standard deviation was calculated according to the classified domains. The consequences of the test research are shown as below： 1. The difference of understanding was obviously made in considering that the group made a better score than the comparative one in understanding to process of making Korean clothes. 2. The difference of skill was highly made in considering that the group made a better score than the comparative one in the practical drill of making Korean clothes. 3. The difference of interests was evidentally made in considering that the group made a better score than the comparative one in the stage of making Koran clothes. Such means that the motivation and attitude of the learners was made stimulate by the Audio-Visual material than by the traditional cramming method. 4. The difference of frequency was fairly made in considering that the experimeatal group made a better score than the comparative one in the frequency of individual teaching. 5. The difference of the efficiency of time-consumption was clearly made in considering that the experimental group made a better score than the comparative one. As the results of the research above, the medium of VTR proved to more effective to the achievement of schoolwork and the strategies of teaching. Therefore, more use of VTR media will help the instructors with the difficulties of practical drill in the whole process of making Korean clothes； Widely use of VTR media in teaching will be surely more fruitfull to the unit of making Korean clothes than teaching by explanation.

• Journal of Sasang Constitutional Medicine
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• v.7 no.1
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• pp.69-101
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• 1995

Using Bi-Digital O-Ring Test which was developed by Ohmura Toshiaki, constitution classification by the vegetables' was measured by various muscle power measurement meters and the results are as follow : 1. Pinch guage (Model : pc5030HPG, Japan) is the guage to measure finger power between the thumb and second finger, Grip Strength Dynamometer (Model : T.K.K. 5101, Japan) is to measure the hand power (hand dynamometer), Back Strength dynamometer (Model : T.K.K. 5102, Japan)is to measue back muscle strength, Vertical Jump Meter (Model : T.K.K. 5106, Japan) is to measure the height of jump. The above guages were used and its result found that the radish, potato, carrot and cucumber can influence to the muscle strength was not true. 2. When the physical constitution is distinguished vy the O-Ring Test method, Taeyangin's rate appeared as average 21% although it was insistedthat there will be only 0.03-0.1%. This means that the influence power of vegetable doest not appear according to the physical constitution but it appears accidently according to the examinee's emotion about the material such as vegetable etc. as favor or unfavor. 3. It was found that the result of O-Ring Test is the same at any time and at any place was not true. there is no reemergence character. 4. The import of O-Ring Test method to the physical discriminatio disregarded that the mental facor influences absolutely to the physical heath in the ideological physical constitution medicla science. 5. 'O-Ring Test method is a objective judgement method'. is wrong judgement. As you see on the above result, Bi-Digital O-Ring Test set the changeable voluntary muscle as the standard of the judgement, that was first mistake logically, second in spite of leass influence of mental influence by the examiner and examinee than the vegetable discrimination influence, the test disregarded the influence. Thire, only grasp of some material on hand can influence to the voluntary was a wrong theory disregarding the physiology. Finally the misunderstaning his subjective view as an objective view in spite of examiner and examinee's strong influence. Therefore such kind of physical descrimination method must be sublated.

• Journal of the Korean Society of International Agriculture
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• v.23 no.5
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• pp.552-559
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• 2011

China is a one of the largest agricultural countries in the world. China consumes around 12.5 billion kilograms of seeds each year. Suchhuge demand for seeds has made the Chinese seed market more and more attractive for investment. Through analysis on the present situation and existing problems of the seed industry in China and based on the current Chinese seed industry development, some future prospects for investments are indicated. This investigation was carried out to propose the appropriate strategies on the development of the Korea seed industry as it considers its entry into the China seed market as a new growth engine in the agricultural sector. The basic law regulating the Chinese seed industry is the PRC Seed Law that generally refers to the protection of germplasm resources, verification of varieties, seed quality issues, the import and export of seeds, seed administrative management, and various rights and obligations. The regulations were aimed at the protection of the rights concerning new varieties of plants. China has two main industry associations, the National Seed Association and the China Seed Industry IP Union, that are non-profit associations consisting of entities and people engaging in the seed scientific research, production, operation and management. The China National Seed Group Co., Ltd. ("Sino Seeds") is the market leader in China regarding the seed industry. The chinese government, however, encourages investment from multinational companies as well as importation of modern crop planting management technologies and equipment. It supports the entry of investors with proven experiences in breeding and germplasm resources expansion and R&D. There has never been a better time for multinational companies with proven seed industry experience to look at building relationships with the Chinese government and enterprises.

• Journal of Environmental Health Sciences
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• v.50 no.3
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• pp.221-228
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• 2024

Background: Social interest is increasing due to frequent accidents caused by chemicals in the electronics industry. Objectives: The purpose of this study is to present a management plan by evaluating the exposure characteristics of dichloromethane (DCM), trichloromethane (TCM), and tetramethyl ammonium hydroxide (TMAH), which are high-risk substances to which people may be exposed in the electronics industry in South Korea. Methods: To investigate the handling companies and status of the hazardous chemicals DCM, TCM, and TMAH, the handling status of the three substances was classified based on electronics industry-related codes from the 2019 Work Environment Survey (Chemical Handling and Manufacturing) data with work environment measurement results for five years. Results: DCM, TCM, and TMAH are commonly used as cleaning agents in the electronics industry. For DCM, it was found that all work environment measurement results from 2018 to 2021 but not 2022 exceeded the exposure standard. Conclusions: Identifying the distribution channels of hazardous chemicals is an intervention point that can reduce exposure to hazardous chemicals. It requires management through tracking systems such as unique verification numbers at the import and manufacturing stages, and proper cultivation of and related support for handling chemicals by business managers.