• Education of Primary School Mathematics
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• v.2 no.2
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• pp.85-102
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• 1998

Since textbooks for elementary school mathematics in accordance with the seventh curriculum are 'Class I' textbooks, which are used as one and only one textbooks throughout the country, the following aspects have been considered： In the legal aspect, the contents including the curriculum for mathematics asked of the Writing Committee by the Ministry of Education were reflected; in the aspect of theory of mathematics education, the textbooks are written in a way appropriate to theory of mathematics education; and in the aspect of application of reality, the textbooks are written to help improving mathematics education in classrooms. Therefore, the main frame of writing the textbooks is to make students feel proud enough to say "I have done mathematics", through helping students rationally solve problems surrounding them by themselves with their experiences and activities. In the above viewpoint the following sentence is reflected upon: "Hundred explanations are not equal to one manipulation activity."

• 제어로봇시스템학회:학술대회논문집
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• 1986.10a
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• pp.304-309
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• 1986

This paper is about the Inverse Jacobian for the TOP-1 robot. The robot Jacobian is used for the movement in accordance with differental changes. A Matrix and Homogeneous Transformation Matrix, Differential Motion Vector D are applied to Jacobian equation for the movement of the robot in accordance with the minut changes. The solution of Jacobian equation is acquired and applied for the subtle movement of each arms of the robot. The interface with APPLE-II Micro-computer is searched out too. The Software and the interface resulted from this paper are considered to be higly useful in the accurate control on the robot when they are linked with dynamics of robot.

• Journal of Environmental Health Sciences
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• v.8 no.1
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• pp.99-107
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• 1982

This study was carried out to improve the curriculum in the department of environmental science technology in junior college, and the results were as follows 1. The educational aim of the department of environmental science technology in junior college has been rearranged. 2. The curriculum has been developed in accordance with the educational aim of this department. 3. The adoption of majoring courses is desirable. 4. The respective educational aims and the respective syllabus of the courses have been set up in accordance with the curriculum. 5. Studies on environmental planning and environmental economics which are necessary in future society, are disirable. 6. The enlargement of the educational oppurtunity in field-works by means of the efficient administration of cooperation committee of industry-college and of the educational effect by means of the utilization of the technology and man-power in the fields of the industry is really desirable.

• The KIPS Transactions:PartB
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• v.8B no.3
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• pp.319-326
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• 2001

오차확산법은 중간조 처리에서 우수한 영상의 재현능력을 갖는 기법이다. 그러나 이의 기법은 경계재현 능력이 미약하며, 주기적인 패턴이 발생하여 영상의 화질을 저하시키는 단점이 있다. 본 논문에서는 경계재현의 능력을 개선하기 위한 경계강조법과 주기적인 패턴 발생을 감소시키기 위한 적응형 임계값 변조를 적용하는 방법을 제안하였다. 경계강조를 위한 임계값을 변조는 원영상의 공간적 기울기 정보를 활용하여 수행하였고, 동시에 기울기 정보를 이용하여 청색잡음 마스크를 적응적으로 적용하는 임계값 변조로 주기적인 패턴의 발생을 감소시키도록 하였다. 적응형 임계값 변조를 적용한 실험에서 영상의 주기적인 패턴이 감소된 보다 선명한 경계강조의 중간조 영상을 얻을 수 있었으며, 객관적인 특성분석을 위한 표시오차의 RAPSD, 거리에 따른 경계상관도 및 로컬 평균 일치도의 분석에서 제안한 기법이 효율적임을 확인하였다.

• The Journal of Asian Finance, Economics and Business
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• v.3 no.2
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• pp.33-39
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• 2016

This study empirically evaluates the impact of exchange rate volatility, foreign direct investment, terms of trade, inflation, and industrial production and foreign exchange reserves on Pakistani trade volume over the period of 1975-2010 using quarterly data set. The study employs financial econometrics methods such as Augmented Dickey Fuller (ADF) test GARCH (1, 1) technique and Almon Polynomial Distributed Lag (APDL) models to estimate the relationship of variables. Findings of the study are in accordance with theoretical relationships presented by Clark, Tamirisa, Wei, Sadikov, & Zeng (2004), McKenzie (1999), Dellas & Zilberfarb (1993) and Côté (1994). These findings are also in accordance with the empirical studies which support positive relationship of exchange rate volatility and exports presented by Hsu & Chiang (2011), Chit (2008), Feenstra & Kendall (1991), Esquivel & Larraín (2002) and Onafowora & Owoye (2008). Findings of the study in terms of imports are supported by the studies such as Lee (1999), Alam & Ahmad (2011) and Arize (1998). The study also recommends some very important policy prescriptions.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.4
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• pp.267-278
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• 2010

The study has following objectives: First, an objective of this studies proves relations between a entrepreneurship and an innovation performance. Second, in innovation performance relationships of social capital this studies proves a mediating effects of a social capitall through theory study, an empirical analysis. In accordance with results of a hypothesis verification, first, a entrepreneurship affects positively a innovation performanc. Second, in accordance with analysis results of a social capital, an entrepreneurship, a innovation performance verified a mediating effects of a social capital. This results mean that the more a social capital an organization has among members, the higher an innovation performance.

• Korean Journal of Pharmacognosy
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• v.46 no.1
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• pp.23-30
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• 2015

Processing of medicinal plants is one of the processing methods for reducing of toxicity or improving of effect on medicinal plants. In this study, we studied the changes in the constituents and antioxidant activity in accordance with the processing conditions by the salt water of Citrus unshiu Markovich. Changes in antioxidant activity was measured by the DPPH method and changes in the components were analyzed by high performance liquid chromatography. As a result, the content of the main constituents (narirutin, hesperidin) and total polyphenol were increased by increasing the concentration of salt water. Moreover, antioxidant activity was increased gradually in proportion to the increase of the total polyphenol content.

• Journal of Korean Society of Disaster and Security
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• v.10 no.1
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• pp.29-34
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• 2017

This Analyzed case study of measuring displacement, implemented laboratory investigation, and in-situ testing in order to interpret ground subsidence risk rating by excavation work. Since geological features of each country are different, it is necessary to objectify or classify quantitatively ground subsidence risk evaluation in accordance with Korean ground character. Induced main factor that could be evaluated and used to predicted ground subsidence risk through literature investigation and analysis study on research trend related to the ground subsidence. Major factors of ground subsidence might be classified by geological features as overburden, boundary surface of ground, soil, rock and water. These factors affect each other differently in accordance with type of ground that's classified soil, rock, or complex. Then rock could be classified including limestone element or not, also in case of the latter it might be classified whether brittle shear zone or not.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.30 no.2
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• pp.58-66
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• 2007

This study is evaluation of shift-workers' sleep and social life related to hospital workers' performance and health. We researched shiftworkers' sleep, sleeping quality and social relations using a questionnaire method to shiftworkplace scattered Daejeon and Chungnam province. The results of shiftworkers' sleep are differ from habitual sleep. Social participations of shiftworkerse are interfered partially because of shiftwork. In preference, shiftworker preferred health to others because of physical load of shiftworks. Through result of this study about sleep and social life style, we hope to derive reduction methods of shift work fatigue and education for improvement of employers, for example an physiological and psychological accordance method, an health problem solving method and an social accordance method, etc.

• International Journal of Railway
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• v.5 no.4
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• pp.152-155
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• 2012

The essential element of brake device for railway vehicle is in demand for higher performance along side the trend of railway vehicle size and speed. Essential element of brake device for high speed train is composed of metallic friction material and brake disc. Thus, brake distance, duration and brake stability shall be determined due to friction materials and friction characteristics. Also friction characteristics are influenced by metallic friction material's properties of matter, manufacturing process and component parts. Various materials and configurations of metallic friction materials are currently being implemented to railway vehicles, For this reason study of friction characteristics in accordance with materials is necessary, but study of these important elements are not actively being accomplished. Therefore, in this study, wished to study the graphite's friction characteristic comprised in friction material in accordance with particle size and amount of volume through lab-scale test.