• 아동학회지
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• 제30권2호
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• pp.161-177
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• 2009

In this study of the relationship between preschoolers' visual perception and reading Hangul words, the 287 participants showed significant developmental change in visual perception between three to five years of age. The researcher developed the computer-based screening Test of Visual Perception for Reading (TVPR). Factor analysis confirmed three factors of TVPR : perception of number, direction, and form constancy. These factors correlated highly with four factors of motor-reduced visual perception of the Korean Developmental Test of Visual Perception (Moon et al. 2003). All factors of TVPR explained reading real words and pseudo words; direction and form constancy perception predicted reading low frequency letters. These findings confirm that preschoolers' skills in visual perception contribute to the reading of words in Hangul.

• 복식
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• 제52권4호
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• pp.97-109
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• 2002

The purpose of this study was to examine volumes 1 through 51-8 of the Journal of the Korean Society of Costume in relation to past trends In content area of research reported, authorship, and funding source. Six subject matter areas were indentified: history of costume, apparel design and aesthetics, fashion marketing, social psychological aspects of clothing, clothing construction, textile science and etc. Of the 892 articles studies, history of costume research represented 40.1%(358). Studies which focused on apparel design and aesthetics increased in number as the journal matured. 51.8%(462) were authored by a sole individual. 48.2%(430) were authored by above two persons. Funding sources were indentified in 15.7%(140) of the 892 articles. College and university grants 72.9%(102) were acknowledged most frequently as a funding source.

• Structural Engineering and Mechanics
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• 제66권4호
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• pp.439-444
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• 2018

This paper presents a numerical study on the behavior of continuous hollow steel beam strengthened using carbon fiber reinforced polymers (CFRP). Most previous studies on the CFRP strengthening of steel beams have been carried out on the steel beams with simple boundary conditions. No independent study, to the researcher's knowledge, has studied on the CFRP strengthening of square hollow section (SHS) continuous steel beam. However, this study explored the effect of the use of adhesively bonded CFRP flexible sheets on the behavior of the continuous SHS steel beams. Finite Element Method (FEM) has been employed for modeling. Eleven specimens, ten of which were strengthened using CFRP sheets, were analyzed under different coverage length, the number of layers, and the location of CFRP composite. ANSYS software was used to analyze the SHS steel beams. The results showed that the coverage length, the number of layers, and the location of CFRP composite are effective in increasing the ultimate load capacity of the continuous SHS steel beams. Application of CFRP composite also caused the ductility increase some strengthened specimens.

• 한국주거학회논문집
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• 제13권3호
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• pp.1-9
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• 2002

Desolation of the earth due to environmental pollution is rising as a world wide problem and concern. At this point we need to look into the problem and set up a direction for the future. In order to reveal the change of garbage problems in our county's civil life, a researcher analyzed 369 garbage related articles from the first edition of Dong A Ilbo up to 1990. The following is the result of data from garbage related articles. It is organized by age and era(10 years). 1) Number of articles by year roses in 1921 after first publication of garbage problem article. In the 1930s, the number of articles drastically increased in 1937. From then on, the number of articles declined until early 1970s but roses again from 1978. 2) Yearly change in articles was a mere 1.2 columns in between 1920 to 1960. In the 1970's, relative importance increased and over 5 columns were published. Articles rose in the 1980s with over 3.4 and 5 columns. 3) The contents of the articles can be classified into cleaning problems, collecting and transporting, expenses, and recycling. Garbage disposal problems continued until the 1970s. Regarding garbage collecting problems, form of collecting container and location was discussed. Laws were revised after garbage disposal areas were discussed in the 1920s. Expenses were levied from the 1930s and rising cost and double charge problems were subjected. Garbage recycling began in the 1920s and continued until 1900s.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2008년도 추계 공동 국제학술대회
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• pp.445-448
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• 2008

The key establishment between nodes is one of the most important issues to secure the communication in wireless sensor networks. Some researcher used the probabilistic key sharing scheme with a pre-shared key pool to reduce the number of keys and the key disclosure possibility. However, there is a potential possibility that some nodes do not have a common share in the key pool. The purpose of this paper is to devise a peer to peer key sharing protocol (PPKP) based on Quorum system and Diffie-Hellman key exchange scheme (DHS). The PPKP establishes a session key by creating a shared key using the DHS and then scrambles it based on Quorum system to secure that. The protocol reduces the number of necessary keys than the previous schemes and could solve the non-common key sharing possibility problem in the probabilistic schemes.

• Journal of information and communication convergence engineering
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• 제9권6호
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• pp.701-705
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• 2011

RFID is a widely adopted in the field of identification technology these days. Radio Frequency IDentification (RFID) has wide applications in many areas including manufacturing, healthcare, and transportation. Because limited resource RFID tags are used, various risks could threaten their abilities to provide essential services to users. A number of RFID protocols have done by researcher in order to protect against some malicious attacks and threat. Existing RFID protocols are able to resolve a number of security and privacy issues, but still unable to overcome other security & privacy related issues. In this paper, we analyses security schemes and vulnerability in RFID application. Considering this RFID security issues, we survey the security threats and open problems related to issues by means of information security and privacy. Neither a symmetric nor an asymmetric cryptographic deployment is necessarily used with light weighted algorithm in the future.

• Asian Journal of Innovation and Policy
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• 제3권2호
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• pp.193-215
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• 2014

This study analyzes the factors on the determinants of research productivity. In addition, this study uncovers the relationships between research productivity and various explanatory variables, and between explanatory variables. As for research productivity, 3 indices were used such as the number of papers, patents, and a combination of them. The data is the 3-year average from 2010-2012 by 1,383 researchers from 6 disciplines such as physics, chemistry, biology, mechanical engineering, electricity and electronics, and chemical engineering, reported to the National Research Foundation of Korea. Personal factors such as sex, age, academic rank and location of affiliation show the group difference for productivity. In addition, most resource factors such as the number of graduate students and research funds showed the same result with personal factors. As for the determinants, master and doctoral students and government funds are the most powerful factors for research productivity, but industry funds for patent and overall productivity.

• Journal of Mechanical Science and Technology
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• 제15권9호
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• pp.1339-1345
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• 2001

Laminar film condensation of a saturated pure vapor in forced flow over a flat plate is analyzed as boundary layer solutions. Similarity solutions for some real fluids are presented as a function of modified Jakob number (C$\_$pι/ ΔΤ/Prh$\_$fg/) with property ratio (No Abstract.see full/text) and Pγ as parameters and compared with approximate solutions which were obtained from energy and momentum equations without convection and inertia terms in liquid flow. Approximate solutions agree well with the similarity solutions when the values of modified Jakob number are less then 0.1 near 1 atmospheric pressure.

• 한국교육학연구
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• 제24권4호
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• pp.247-286
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• 2018

본 연구는 최근 10년(2009년부터 2018년 전반기)간 "교육행정학연구"에 게재된 연구논문을 대상으로, '연구자의 특성'에 따른 연구 동향을 분석하고자 하였다. 분석결과를 바탕으로 다음과 같은 결론을 도출하였다. 첫째, 연구자의 측면에서 '단독' 연구보다 '공동' 연구가 많이 수행되었으며, 제1저자가 '남성'인 경우가 '여성'인 경우보다 많았고, 제1저자가 '대학 교수'인 경우가 가장 많은 가운데, '교수'와 '대학원생'의 공동연구 활동이 활발하게 이루어지고 있었다. 둘째, 연구 성격의 측면에서 이론(혹은 모형)을 개발하고 검증하려는 연구들이 증가하였다. 셋째, 연구 방법의 측면에서 고급통계를 사용한 '양적연구', 면담과 관찰을 통한 '질적연구'가 증가하는 등 한국의 교육행정 현상을 기술하고 설명하려는 연구들이 증가하였다. 넷째, 연구 영역의 경우, '학교조직 및 경영', '고등교육', '교육정책 및 기획' 영역에 대한 연구자들의 관심이 높은 것으로 드러났다. 다섯째, 각 '영역'별로 해당 영역에 대한 연구를 주도적으로 수행하는 '연구자의 특성', '연구 성격', 그리고 '연구 방법'에는 다소 차이가 있었다. 이와 같은 연구결과를 바탕으로 본 연구는 4차 산업혁명시대에 부응하는 미래의 교육행정학 연구 동향의 전망을 제안하였다.

• 복식
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• 제31권
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• pp.61-73
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• 1997

Kon-myuh was worn by the ancient Chinese and Korean rulers as ceremonial dress during special rituals such as worshipping heaven and ancestors marriage or funerals. kon-myun consists of two major parts-Myun and kon-bok (the main bodypiece) as well as other articles of clothing(skirt footgear etc), There were regulations set in ancient books describing in detail the make of the kon-myun number of ryu and symbol to be used all which applied to each ruler depending on rank and status. This study is aimed at examining the consistency of the korean and Chinese in following the regula-tions as seen in relics which have been recovered from the past. Based on historical findings it seems that Korean Kon-myun came to Korea from China during the Three Kingdoms period. It was also worn in the Koryo and Chosun Dynas-ties and the Taehan Empire. In studying Konmyun in Korea the researcher studied a book from the early Chosun dynasty, Kukjo-oryeuiseory and a book from the late Chosun Dynasty Kukjo-sangrye-bopyun to find the guidelines and rules applying to the Kon-myun tradition. Slight difference were found across time in the supplementary articles of clothing as seen in Uigwe Pokwan-doseols explanations and drawings of Kon-myun. The researcher used uigwes of funerals of kings of the Chosun Dynasty and observed change over this period of time. However there was a clear consist-ency: the king's Kon-myun consisted of 9ryu-myun 9chang-bok while that of the prince consisted of 8ryu-myun 7chang-bok. For the Taechan Empire the researcher used Tae-han Yae-jun which shows the emperor's kon-myun to have consisted of 12ryu-myun 12chang-bok. To study how the regulations were put into practice relics were uncovered from the periods being studied. A portrait of King Ik-Jong remnants from King Ko-jong's Kon-bok and a photograph of Emperor Sun-jong all were in close adherence to the regulations outlined in the books. In China Kon-myun was worn by emperors from the Han to the Ching Dynastices. The researcher investigated Kon-myun es-pecially in the Ming Dynasty. The Kon-myun regulations as read in Tai-ming-hui-chan changed through all four periods. To study the faithfulness of practice to low Ding-ling the tomb of Emperor Shin-jong who ruled during a period of the Ming Dynasty was unearthed and the remains of the Emperor's Kon-myun were analyzed. The Kon-myun consisted of 12ryu-myuh 18chang-bok and there were other differences I color symbols and wearing method when compared to the regulations. It can be concluded that the Chinese Kon-myun tradition was not in strict adher-ence to the regulations established by law books. This is in contrast to the Korean Kon-myun tradition which showed little devi-ation. Further study is needed to understand why there was this difference in tradition and ritual.