• Journal of Korean Ophthalmic Optics Society
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• v.4 no.1
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• pp.77-82
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• 1999

To have a fine understand the refractive error eye of Korean adult male, This study was researched visual acuity test using objuctive and subjective methods. The results are as follows: 1. The eye types were 93.3% positive for myopia, 5.4% for emmetropia, and 1.7 forhyperopia, respectively. 2. The refractive error eye was positive for compound myoptic astigmatism for a percntage of 62.6%, simple myopia(32.4%), simple myoptic astigmatism(1.6%), simple hyperopia(l.4%) simple hyperopia astigmatism(0.5%), and mixed astigmatism(1.6%). 3. The axis of astigmatism was 59.7% for regular astigmatism, 25.3% for oblique astigmatism, and 15% for reverse regular astigmatism, respectively. 4. on the total myoptic spheric power, the -2.00

• Sijohaknonchong
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• v.26
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• pp.55-75
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• 2007

Sijo is the essence of Korean literature and the most ideal poetic form through which we can express our images gracefully in three lines. Hence it deserves special emphasis either in creative writing and appreciating it from elementary school to middle school. In this paper observes how Sijo is taught in the schools and suggests the direction of educating Sijo. There may be three kinds of Sijo performance, namely, recitation, reading, and singing. In this paper. it is claimed that the performance of Sijo in the twenty first century should be recitation. Sijo education may be effective when it focuses on a way of recitation in which, with natural and long breath, a piece of Sijo is recited at length. Nevertheless, it is not practiced as the way of recitation because of following two reasons. Firstly. the analysis on rhythm, which is on the base of its recitation, is extremely difficult. Secondly, the theoretical ways, which is obsolete and lacks vividness, are ineffective in education. By these reasons. 1 studied how to give a recitation following my preceding studies on rhythm and rhythmical reading of Sijo. As a result, this paper suggests a reading method as a solution to the problems. In fact, we Korean can discipline our mind and body through reciting Sijo to the rhythm which is transcendental to Korean and at the same time, Sijo education helps to enhance our pride as koreans in the process of studying Sijo.

• Management & Information Systems Review
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• v.37 no.1
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• pp.41-53
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• 2018

This study validates the trading rules based market anomalies and technical analysis in the Korean stock market. For the analysis, we built decile portfolios on the basis of corporate characteristics factors that clearly demonstrate specific patterns of stock returns including the firm size, book-to-market equity, and accruals. This portfolio was used to develop a portfolio based on the moving average trading strategy which was used for popular technical analysis tools, and then that was evaluated using the Sharpe ratio. We also created a zero-cost portfolio to identify the profitability and success rate of the moving average trading strategy. We lastly sought to ensure a more robust evaluation by calculating the Sortino ratio of the portfolio based on the moving average trading strategy with various lags. Key findings from this validation are as follows. First, a smaller firm size, a higher book-to-market equity, and lower accruals led to larger average returns. Second, the risk-adjusted performance of the moving average trading strategy was the highest in terms of the firm size, followed by book-to-market equity and accruals. Third, the returns of the zero-cost portfolios all had a positive value, with its overall success rate hovering over 68.8%, demonstrating the successfulness of the moving average trading strategy. Fourth, various evaluations revealed the economic usefulness of our trading strategy that used market anomalies and technical analysis.

• Journal of the Economic Geographical Society of Korea
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• v.9 no.3
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• pp.341-357
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• 2006

Recently new periodic markets formed in large apartment areas where consumers live. Before, in the case of peasant periodic markets travelling merchants, consumers and producers met in specific places on decided dates. Closing time of apartment's new periodic markets is later than that of peasant periodic markets, and the number of travelling merchants is fewer than that of peasant periodic markets. The average number of apartment and household for a new periodic market is about ten and 920 respectively, and if neighboring apartment household are included, the number is larger. Apartment's new periodic markets in Cheongju city is included in Daejeon market area. The types of regional trip of travelling merchants can be divided into one round trip of two or three neighboring dongs and larger sphere of more than 4 dongs. The larger sphere round trip consists of one type combining the southeastern, southern and southwestern regions, and the other type combining southeastern and southwestern regions. About 85 percent of travelling merchants visit the periodic market 5 days in a week; about 12 percent of travelling merchants choose to visit on Saturday; only 2 percent of travelling merchants visit 4 days in a week.

• Sijohaknonchong
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• v.22
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• pp.57-83
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• 2005

This article reviewed ‘Gojangsijoseonju(고장시조선주)' which was written by Gojeong-ok(.고정옥), a scholar of Korean literature. and showed the features and importance in the history of Korean literature. Gojeong-ok was not properly studied in the history of Korean literature for the time being because he went to North Korea during the Korean war. Even for the researcher on Korean literature.' the literary works of Gojeong-ok were not introduced properly. However, the systematic studies on Gojeong-ok and his literary works should be done, and should be well appreciate his work in the history of the research for Korean literature by his achievements. This article considered his literary achievement through his book, 'Gojangsijoseonju'. 'Jangsijo(장시조), that was named by Gojeong-ok for 'Saseolsijo(사설시조), stood in highly important position to explain the history of literarature in late period of Chosun(조선) Dynasty. He tried the analysis on the fifty (50) selected 'Saseolsijo' and made commentaries on them in his book. And he suggested the original and creative theory on 'Saseolsijo' at the time of the book published. This article considered his understandings on the poems of classical literature, revealed in his literary works, and especially, the features on the theory for the 'Jangsijo'. Through this process, it could be clearly understand his views on literary works in itself. By considering the analysis of literature that was introduced with the commentaries, it could be seen the aspects of the specific analysis on each literature. Through these works, it could be looked forward to getting more detailed investigating clue on the view of Gojeong-ok for the poems of classical literature.

• Journal of the Korean Association of Geographic Information Studies
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• v.11 no.2
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• pp.73-84
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• 2008

This study has conducted the survey Daegu area on the evaluation of the wind generation by the spatial geograph conditions and according to the elements that practically affecting the generation of the wind. Because the elements affecting the wind generation are very diverse and interrelated, it is very important to secure accurate fundamental datas. For getting these datas, by applying satellite images to the study, more accurate datas were collected and the result of study is summarized as follows First of all, it has been acknowledged that due to the Daegu,s geographic features, there are a lot of areas with high wind generation, but most of these areas have been distributed in the outskirts of the city, where as in the areas wind generation is relatively very low in the urbanized areas, which indicate that the spatial unbalance is very high. And what is more of wind generation in certain areas where places spatially connected to the urbane district, show very low wind generations, and its influenced range become limited. From this fact, it can be estimated that the effects of the wind corridor coming into the urban district will be reduced. And also through this study, it could be verified that there are ample possibility of applying the satellite data as a means of building up the spatial data for evaluation of formation of the wind corridor.

• Ecology and Resilient Infrastructure
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• v.3 no.4
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• pp.315-321
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• 2016

To identify the relationship between land use and thermal environment in an urban area, the air temperature was measured at different places of land use, and the changes of land use and air temperature were traced for 40 years in Incheon City. The relationship between land use and temperature was also investigated using satellite image data. The results of temperature measurements on a forest, a cropland (rice paddy), a bareland (school ground), and an urban area (asphalt road) from 19 to 21 August 2014 showed that air temperature was the highest on a pavement road. The temperature increased by about $1.4^{\circ}C$ ($0.035^{\circ}C/year$) for 40 years from 1975 to 2014 in Incheon. The changes in land use patterns of Incheon for the past 40 years showed that urban dry land, bareland and grassland have increased and cultivated land, wetland and forest land have decreased gradually. The land surface temperature (LST) was correlated with the normalized difference vegetation index (NDVI) and normalized difference built-up index (NDBI) extracted from Landsat satellite image. The land surface temperature was lower at higher NDVI, and higher at higher NDBI. Therefore, it is important to conserve and restore the land use of greenery, wetlands, and agricultural land in order to mitigate the heat island effect and improve the thermal environment in an urban area.

• Journal of the Korean association of regional geographers
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• v.16 no.4
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• pp.387-399
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• 2010

This study, using Fractal theory, aims to examine the meaning in the aspect of urban spatial structure by reflecting the characteristics of elements organizing the urban space and at the same time measuring the urban form quantitatively. By calculating Fractal Dimension to Cheongju as a target, it conducted comparison and analysis by dividing building and road which are internal element of a space into the whole city and urbanized area to compare and analyze validity of the theory application and the inside of an actual urban space. For the method of an analysis, it calculated Fractal Dimension by linking a digital map including the property of building and road with GIS program and using box counting. An analysis result showed that the result value of Fractal Dimension by structure and road is all high and similar. It drew a similar result value from the whole Cheongju and the urbanized area as well, but commercial and industrial area showed low result value from the partial viewpoint. However, it is correct to regard these spaces as one space because they are intimately connected with a residential area. From the general viewpoint, it could be said that Cheongju's Fractal Dimension grows in the context of a urbanized area.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.2
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• pp.21-25
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• 2000

The old age may experienced the visual acuity decrease according to refraction abnormality and they have a inconvenient real life style on viewing condition. So that, This study can provide the accurate information on the treatment of visual acuity of a male old ages by test of eye refraction state. The test was performed the visual acuity test by the object and subject methods.and the subjects was the Korean male over 55 old age. The eye types were 0.8 % positive for emmetropia, 15.2 % for myopia, and 84 % for hyperopia, respectively. The abnormal refraction eyes were 1.3 % positive for simple myopic astigmatism, 13.9 % for compound myopic astigmatism. 3.4 % for simple hyperopia and 3.1 % for simple hyperopic astigmatism, 77.5 % for mixed astigmatism, respectively. The asix of astigmatisms were 62% positive for against-the-rule astigmatism, 6% for with-the rule astigmatism, and 32 % for oblique astigmatism, respectively. On the total myopic spherical power, the $-0.50{\leq}$spheric equivalent <-2.00 diopter was 84.3%, the $-2.00{\leq}$spherical equivalent <-6.00.diopter was 15.7%. On the total hyperopic spherical power, the $+0.50{\leq}$spheric equivalent <+2.00 diopter was 74.2%, the $+2.00{\leq}$spherical equivalent <+6.00 diopter was 24.8%, and anything over the +6.00 diopter was 1%. On the astigmatic power, the $0.5{\leq}$cylinder <1.00 diopter was 54.1%, the $1.00{\leq}$cylinder <2.00 diopter was 32.4%, and anything over the 2.00 cylinder diopter was 13.5%.

• Journal of Korean Ophthalmic Optics Society
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• v.11 no.2
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• pp.121-129
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• 2006

Prevalence of refractive error have revealed variation in relation to ethnicity, educational level, age, gender, and social economic status. Especially prevalence of refractive error varies by country, estimation of prevalence of refractive error have shown increase in Asia than in Western world. The present report aimed to investigate the prevalence of refractive errors by the age and gender in Korean population without eye disease. A total of 960 subjects were sampled and their refractive error was determined using Auto refractometer. Prevalence of emmetropia was 29% and that for myopia and hyperopia was 67%, 4%, respectively. Astigmatism was 22%, and the simple astigmatism was 1%. However the compound astigmatism was 99%. Prevalence of refractive errors differed significantly among age and gender group in our results. The percentages of with-the-rule, against-the-rule and oblique astigmatism among people with astigmatism were 36.6%, 20.7% and 42.7% for right eye and 31.8%, 10% and 58.1% for left eye.