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A Contribution Culling Method for Fast Rendering of Complex Urban Scenes (복잡한 도시장면의 고속 렌더링을 위한 기여도 컬링 기법)

  • Lee, Bum-Jong;Park, Jong-Seung
    • Journal of Korea Game Society
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    • v.7 no.1
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    • pp.43-52
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    • 2007
  • This article describes a new contribution culling method for fast rendering of complex huge urban scenes. A view frustum culling technique is used for fast rendering of complex scenes. To support the levels-of-detail, we subdivide the image regions and construct a weighted quadtree. Only visible objects at the current camera position contributes the current quadtree and the weight is assigned to each object in the quadtree. The weight is proportional to the image area of the projected object, so large buildings in the far distance are less likely to be culled out than small buildings in the near distance. The rendering time is nearly constant not depending on the number of visible objects. The proposed method has applied to a new metropolitan region which is currently under development. Experimental results showed that the rendering quality of the proposed method is barely distinguishable from the rendering quality of the original method, while the proposed method reduces the number of polygons by about 9%. Experimental results showed that the proposed rendering method is appropriate for real-time rendering applications of complex huge scenes.

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A Validity Study of the Korean Version of the Interprofessional Attitudes Scale (전문직 간 태도에 대한 한국어판 측정도구의 타당화 연구)

  • Park, Kwi Hwa;Park, Kyung Hye;Kwon, Oh Young;Kang, Youngjoon
    • Korean Medical Education Review
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    • v.22 no.2
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    • pp.122-130
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    • 2020
  • Concern for patient safety underlies the need for interprofessional education (IPE). One way to measure the effectiveness of IPE is by measuring attitude change toward other healthcare professionals; however, there are currently no valid Korean tools to measure such a change in attitudes. Therefore, this study aims to develop and test a Korean version of the Interprofessional Attitudes Scale (IPAS). The original IPAS was translated into Korean according to the World Health Organization's guidelines after obtaining permission from the article's corresponding author. A total of 414 questionnaires were collected from third- and fourth-year medical and nursing students at four Korean institutions in December 2018. To analyze the validity of the Korean IPAS, exploratory and confirmatory factor analyses were conducted. Cronbach's α was used to evaluate reliability. Results from the exploratory factor analysis identified four functions: teamwork, community-centeredness, patient-centeredness, and respect for diversity. Significant cross-correlations were found among the four functions (r=0.438-0.631, p<0.001) along with overall reliability (Cronbach's α=0.929) and reliability of each subfactor (Cronbach's α=0.804-0.897). This study verified the validity and reliability of the Korean version of the IPAS, so this scale can be used in the future to measure the effectiveness of IPE in Korea.

Analysis of various statistical techniques used in the articles published during last 19 years in The Journal of Korean Acupuncture & Moxibusition Society (침구학회지 논문에 응용된 통계방식에 관한 연구 -1984 창간호부터 2002년 19권 6호까지 19년간-)

  • Lee, Seung-deok
    • Journal of Acupuncture Research
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    • v.20 no.1
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    • pp.144-158
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    • 2003
  • This study was carried out to investigate what kinds of statistical techniques have been used to analyze data from oriental medicine research, For study, 551 original articles which used statistical techniques in their data analysis were selected form the articles published in The journal of Korean Acupuncture & Moxibustion Society(JKAMS) between 1984 to 2002. among them, 122 articles used descriptive statistics while 429 articles used inferential statistics for data analysis. For that 429 articles, t-test (189 articles), analysis fo variance (111 articles), chi-square test (14 articles), correlation (10 articles), regression analysis (4 articles), factor analysis(5 articles), or nonparametric test (23 articles) were chose to analyze the data. Nonparametric approach has substantial power in case data do not meet the assumption of normality. This method is not only easy to use ut also provides measures of the statistical variation of nominal and ordinal scale. This study shows that more and more recent papers use nonparametric test compared to the old articles. nine different statistical software or packages (SAS, SPSS, Statview, Minitab, Sigma plot, ISP, Graphpad prism, Excel, Access) have been used in the articles published JKMAS. High level statistical techniques such as SAS, SPSS, and Statview are user friendly and used most for acupuncture and Moxibustion research. Including tables and plots in an article facilitates understanding family process data from a descriptive standpoint, minimized erroneous statistical conclusions, and clarifies theoretically important relationships among variables. Table and plots have been used 500 and 233 articles, respectively. A computer procedure is proposed and illustrated with statistical packages using SAS, SPSS, Statview and ISP.

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Impact Factors and Publication Times of Korean Plastic Surgery Journals (한국 성형외과학술지의 영향력지수 및 발간기간)

  • Hwang, Kun;Choi, Hyuk Kyu
    • Archives of Plastic Surgery
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    • v.35 no.2
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    • pp.147-151
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    • 2008
  • Purpose: The purposes of the authors' analysis were to assess the values that plastic surgery journals demonstrate in terms of the standardized measures created by the Korea Medical Citation Index, and to assess the relationship between these values and the turnaround time of these journals. Methods: The overall indexes of J Korean Soc Plast Reconstr Surg(JKSPRS), J Korean Soc Aesthetic Plast Surg(JKSAPS), J Korean Cleft Palate-Craniofac Assoc (JKCPRA) were compared with those of journals related with Korean plastic surgery using the following parameters: impact factor, cited half-life, total articles, and the number of journals. Korean plastic surgery journals were compared with journals from relative fields. In addition, an evaluation of all original articles published in 2007, assessing the time intervals from submission to publication was conducted for Korean plastic surgery journals and various journals which were related with plastic surgery. Results: The number of articles for Korean plastic surgery journals for 2006 ranged from 19 for JKCPRA to 149 for JKSPRS. The time interval from submission to publication of an article among Korean plastic surgery journals for 2007 ranged from 73.7 days for JKSAPS to 176.2 days for JKSPRS. The variation in impact factor of JKSPRS for the period from 2002 to 2005 increased from 0.084 in the year 2002 to 0.168 in 2005. But the impact factor in 2006 has fallen to 0.112. Conclusion: JKSPRS demonstrated comparatively high overall index values and a short turnaround time in comparison to relative journals. To improve the status of Korean plastic surgery journals, members of Korean plastic surgeons should quate Korean plastic surgery journals and adjust key word to MeSH. The title written down in Korean should use medical terminology published by Korean medical association.

Exploring the Dimensions of Self Efficacy Scale for Information Literacy (정보문해 자기효능감 척도의 적용을 위한 탐색적 연구)

  • Shim, Won-Sik;Ahn, Hye-Yeon;Kim, Hyun-Soo;Kim, Sung-Hwan
    • Journal of the Korean Society for Library and Information Science
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    • v.43 no.4
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    • pp.307-326
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    • 2009
  • The concept of self efficacy, originally theorized by Bandura, has been applied to a wide variety of fields including education, psychology, and business. There has been steady effort to develop relevant scales to operationalize and measure self efficacy. This article reports on the results from an analysis of Kurbanoglu's ILSES (Information Literacy Self-Efficacy Scale), the only reported such scale in the area of information literacy. Over 400 university students responded to the ILSES survey consisting of 40 items grouped in six categories. The main analysis used was factor analysis. The results show high degree of internal consistency of the items included. However, the factors derived from the study differ significantly from the factors in the original study. Overall, these factors seem to reflect the heuristic nature of students' information seeking and use patterns, favoring Internet resources and instant gratification.

Toward an Integrated Theory of Language (대통합 언어이론을 향하여)

  • 문경환
    • Lingua Humanitatis
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    • v.1 no.1
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    • pp.33-63
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    • 2001
  • This article does not deal with a theory or theories in the usual sense of the term but rather harks back to its etymological source, theorein ' to look at.' The phrase 'theory of language' thus purports a 'view of language' and does not carry the force of scientific explication of language. In fact, the word ' scientific' or 'science' per se originates from scire 'to know' and is here to be considered not so much in regard to some kind of positivistic methodology as a form of knowledge. If this exposition sounds unduly ingenious, that is because one is caught up in all kinds of presuppositions about the words under consideration. Sometimes, when we come to grips with an issue that strikes our mind as truly important, our language, by the light of which we hope to proceed safely, plays the will-o'-the-wisp instead and leaves us in the middle of a murky maze, twisting what was at first blush a mere cinch into a Gordian knot. On such occasions, etymology comes along the way and sends us back to itself as its own principle: Resort to etymos logos 'original, true word'! The main thrust of the present study is that alongside the quantitative, positivistic thought there is another equally valuable mode of qualitative and humanistic thinking that makes a whole gamut of new and concrete investigations possible, that an integrated theory of language is Possible by way of a happy amalgamation of diversified, humanistic views of language. With this idea as the leitmotif we explore two models of theory which typically set themselves up for a 'scientific' approach to language: analytic philosophy that delves into what it calls logical simples, and contemporary linguistics that stubbornly teeters around some formal rigor or other. It is argued that they are both characterized by a looking away from the fluid, ill-definable aspects of language, giving a preference to segments and isolated facts as a means to avoid those larger wholes and totalities which if they had to be seen would in the long run lead to an uncomfortable state of mind. Language, in the final analysis, is a Protean entity: so capricious and multifarious, and yet so noetic and prophetic, that we should catch sight of its picturesque images in their entirety to give form to an integrated theory of language.

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The Analysis on Trend of Clinical Studies about Dizziness in Journal of Korean Medicine (국내 한의학 학술지에 게재된 현훈 임상논문의 경향 분석)

  • YI, Gil-Hee;Jung, Chan-Yung;Hong, Seung-Ug
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.30 no.3
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    • pp.88-102
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    • 2017
  • Objectives : The aim of this study is to review domestic clinical studies about dizziness in Korean medicine. Methods : Population key words "현훈(Hyeonhoon), 현기증(Hyeongijeung), 어지럼(Eojireom), 어지러움(Eojireoum), 실신(Silsin), 眩暈(Hyeonhoon), 眩氣症(Hyeongijeung), 失神(Silsin)" were searched on five database systems(DBpia, KISS, KMbase, NDSL, RISS) from September, 13th to September, 15th, 2016. 60 clinical studies were collected and classified by published journal, year, etiologic disease, study design, dizziness assessment tools of studies, study results, evaluation of disease pattern and process, interventions(herbal medicine and acupuncture treatment points), and number of studies which chose that prescription. Results & Conclusions : Dizziness was researched constantly since 1998 and 7 clinical stuides were issued 2007, the most. The journal which the most studies were presented was Journal of korean oriental internal medicine(12 studies over 60, 20%). Original article were 12(20.0%) and case reports were 48(80.0%) among 60 studies. BPPV was reported as a etiologic disease on 9 studies(20.45%) among 44 studies. VAS was used mainly as dizziness assessment tools of studies(26 studies over 38, 68.42%). 9 studies(15.0%) got evaluation of disease pattern and process among 60. Banhabaekchulcheonma-tang was reported as a herbal medicine prescription on 9 over 44 studies(20.45%) and ST36 was chosen acupuncture point most(24 over 45 studies, 53.33%). It doesn't have enough representativenes but has meaning to apprehend present tendency to treat dizziness in Korean medicine clinical studies.

A Bibliographic Study on the Theory of the 'Qi-Pum(氣稟)' (기품론(氣稟論)에 관(關)한 문헌적(文獻的) 고찰(考察))

  • Kim, Hyuk;Kim, Dal-rae
    • Journal of Sasang Constitutional Medicine
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    • v.10 no.1
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    • pp.311-341
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    • 1998
  • The objective of this article is to induce that the conception of 'Qi-jul(氣質) and Qi-pum(氣稟)' was introduced to the Sasang(四象) Constitutional Medicine from bibliographic study on the theory of 'Qi-pum(氣稟)'. The conclusions summerized as followings. 1. In the oriental medicine, qualitative difference of 'zheng-qi(正氣)' among the individuals, the opposing power against a disease, is regarded as constitution. Having been used as 'nature(素)', 'quality(質)' and 'character(氣質)' in the oriental medical book, the word of 'Che-Jil(體質)' was used in good earnest at the end of 'Qing(情)' dynasty. 2. The nature(性) is divided into two, original nature(本然之性) and charicteristic nature(氣質之性) in the 'New confucianism(新儒學)' and the former means a principle(理), is a pure and good thing and used as a conception of universality, the latter is a principle of character and a imperfect imitation of principle(理). 3. It was repeatedly confirmed that 'Qi-jil and Qi-pum' meant the difference among the individuals by the dispute of 'Li-Qi(理氣)' caused by Lee Hwang(李滉) and Lee Yi(李耳) and by that of 'Ho-Rak(湖洛)' in the Ch'o-son(朝鮮) dynasty. 4. Han Sok-Ji, based on Meng-Zi(孟子)'s doctrine that man's inborn nature is good, criticized the theory of 'Qi-pum' which was 'Zhu-Zi(朱子)'s opinion and his opinion about the life(命) was thought to clue to the classification of the 'Sasang(四象)' invented by Lee Je-Ma as Park Se-Dang's theory that everyone has common nature but has different life(命). 5. By introducing the theory of 'Qi-pum' and the conception of life(命) which was understood as a special character by Han Sok-Ji and Park Se-Dang to Sa-sang constitutional medicine, Lee Je-Ma explained the reason why each man who was classified four constitutions, 'Taiyang'(太陽), 'Taiyin'(太陰), 'Shaoyang'(少陽), 'Shaoyin'(少陰), had the different formation of the visceral department(臟局).

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A Study on the Meridians for treat the miscellaneous diseases in Jap ByoungPyeon(雜病篇) of the Young Chu(靈樞) (영추(靈樞).잡병편(雜病篇)의 잡병치료경락(雜病治療經絡)에 대한 연구(硏究))

  • Lee Moon-Og;Yuk Sang-Won
    • Korean Journal of Acupuncture
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    • v.20 no.4
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    • pp.99-119
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    • 2003
  • Objectives : The Jap Byoung(雜病) of the Young Chu(靈樞), one of the classical book of oriental medicine contains symptoms and remedies for various diseases that can be seen on human body. But it is too difficult to understand the Jap Byoung(雜病), because it is written in old chinese and there are many printer's error and omissions or adds in this book. As a consequence of above reason, the writer of this article has researched to find out the exact meaning of that. Methods : So in this part we study a woodblock-printed book of successive generation and view of annotators, and add adding notes, adjustment, translation to exact comprehension of the original text. Results & conclusions : The principle ideas of the thesis can be summarized as follows: The Jap Byoung(雜病) is consist of five part. In chapter 1, we present symptoms occurred by the upstream current of Qi(氣逆) and their treatments by taking meridian flowing the body parts on which the symptoms occur. In chapter 2, we deal with symptoms such as ikgun(?乾), a pain of the knee(膝中痛), huby(喉痺), epistaxis(?血), lumbago(腰痛), anger(怒), a pain of the jaw(痛), a pain of the nape(項痛) and their remedies. In chapter 3, since abdominal inflation occurs when the Qi(氣) of the five viscera(五臟) is damaged or go upstream, I discussed that the treatment should be given by taking the meridian accordingly. In chapter 4, we deal with the remedy for heartache, and different meridians to be taken by symptom, and parts on which needle to be used, and detailed remedies. In chapter 5, we present other diseases, detailed body parts to be cured and remedies by referring symptoms for a pain of the jaw(痛), the upstream current of Qi(氣逆), hiccup, etc. Especially, we introduce a part of Doinbup(導引法) for wegurl(?厥) and remedies for hiccup such as inducing sneeze by stimulating nostrils, holding one's breath, etc.

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The effect of premolar extractions on tooth-size discrepancy in malocclusion patients (Original Article 1 - 부정교합과 차등적 소구치 발치가 치아 크기 부조화에 미치는 영향)

  • Kim, Hee-Hun;Sung, Sang-Jin;Moon, Yoon-Shik
    • The Journal of the Korean dental association
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    • v.48 no.3
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    • pp.196-204
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    • 2010
  • To establish the ideal occlusal relationship, the values of tooth size and ratio must be in a normal range. In this study, the means and standard deviations of Bolton's anterior ratio and overall ratio using mesiodistal dimensions of teeth measured on diagnostic models of 334 Korean malocclusion patients were calculated and differences in Bolton ratio according to the groups of malocclusion patients were studied. Also the changes that can occur in overall ratio before and after hypothetical tooth extractions were observed. The results are as follows. 1. The mean anterior ratio of Korean malocclusion patients was $78.0\;{\pm}\;2.69%$, and the mean overall ratio was $91.56\;{\pm}\;2.28%$. 2. The largest value of tooth size ratio could be found in Class III group, followed by Class I and Class II groups in order. However there was no statically significant difference. 3. The values of overall ratio reduced significantly after premolar extractions in all malocclusion groups, which was much more significant in the extraction of upper second premolar and lower first premolar(U5L4) or upper second premolar and lower second premolar(U5L5). 4. The values of overall ratio reduced significantly after premolar extractions in all 3 groups divided based on Bolton ratio, which was much more significant in the extraction of upper second premolar and lower first premolar(U5L4) or upper second premolar and lower second premolar(U5L5).