• Journal of Information Technology Applications and Management
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• 제22권3호
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• pp.55-64
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• 2015

We propose statistical methods for evaluating the efficiency of CAPTCHA. Most people unfairly assumed that machines are not capable at reading precisely. This fact leads to the invention of CAPTCHA, a distorted word or short phase, which is designed to thwart computers and separate human from machines. However, advances in image recognition technologies mean that machines are constantly getting better at recognizing CAPTCHA. This forces CAPTCHA designers to design even more difficult CAPTCHAs to prevent their systems from being gamed by malicious bots. However, this arm race has an unintended side effect on the common users. Many CAPTCHAs are now so hard that many people are unable to read them. This obviously conflicts with the original purpose that CAPTCHA was invented in the first place. Our analysis shows that some CAPTCHAs are more users friendly. In particular, Yahoo-style CAPTCHA is the most friendliness. This suggests that a good CAPTCHA could be a simple text with some distortion that prevents machines from correctly segmenting characters.

• 기술혁신학회지
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• 제2권1호
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• pp.90-103
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• 1999

This article is dedicated to present a cornerstone for a desirable legal structure in the area of the administration and utilization of the intellectual property rights of the university research results sponsored by the government, and, in the long run, contribute to the industrial development of our country. In order to achieve that purpose, this article reviews basic theories and current status of the intellectual property regime for the research results sponsored by the government, and presents some suggestions for a desirable legal institution, in particular, including that 'Intellectual Property Rights Administration Center', should be established, an exclusive institution for the systematic administration of the follow-ups of the research results with speciality.

• International Journal of Knowledge Content Development & Technology
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• 제12권3호
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• pp.19-29
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• 2022

The new age is characterised by information communication technology, where computers, laptops, mobile gadgets such as palmtops, tablets, mobile phones and the internet have made their way to every sphere of life from our domestic environments such a homes, small retail shops, banks to large industries and the world at large. Over time, so many questions about the ethical use of Information and Communication Technology (ICT) have emerged on who has access to what technology and the use of it and like every other technological invention. This paper will look at the morality involved in making use of ICT to promote ethical use of data or information in a virtual environment. ICT also possesses both positive and negative impacts; the questions that these impacts raise are what this piece attempts to answer, providing global scrutiny to these ethical issues, situations and questions; and providing recommendations in line with global best practices.

• 대한소아치과학회지
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• 제26권4호
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• pp.644-651
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• 1999

미맹출된 상악 중절치는 비교적 흔히 임상에서 8세이상의 아동에서 관찰될 수 있다. 맹출실패의 원인으로는 치배의 비정상적인 발육이 언급되는데 아직 명백히 밝혀지지는 않았지만, 이는 외상이나 선행유치의 치근단 감염으로 유발될 수 있다. 본 증례는 외상의 병력이 없어 유치의 치근단 감염에 의한 상악 중절치의 매복을 고려해 볼 수 있다. 치아의 맹출과 Hertwig's epithelial root sheath 에 의한 지속적인 치근 발육을 유도하기 위해서는 외과적 노출과 가철성 장치를 이용한 교정적 견인이 치료방법으로 시행될수 있다. 본 증례는 역위 매복으로 인해 치근의 만곡이 예상되며 치근의 발육이 지연된 치아를 치근형성 전 조기에 가철성 장치를 이용한 교정적 견인에 의해 정상적인 맹출과 인접치와 유사한 치근 발육이 얻어졌다. 하지만 향후 완전한 치근 형성 유무에 대한 주기적인 검진과 부착치은 획득을 위한 치주적인 처치가 필요하리라 사료된다.

• 공학교육연구
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• 제15권5호
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• pp.78-81
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• 2012

This article presents the development and application of educational programs at Chungnam National University(CNU). College of engineering in CNU developed the engineering education program, CNU Engineering Fair, in 2009, and it is annually holding in September or October. The purposes of the fair are to show superiority of the college of engineering students of CNU, to strengthen the industry-university cooperation and to motivate students to lead their engineering interests. As a result of the fair, the opportunity to understand the college of engineering has been increased for students in the college of engineering as well as the public. As the development of human resources has been concerned, it gives us a chance for individual development and career development. Finally, the fair causes interests in engineering to high school students.

• 대한영양사협회학술지
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• 제4권1호
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• pp.76-87
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• 1998

The purpose of this study was to examine the nutrition knowledge and attitude of the elderly for developing nutrition education program. The nutrition knowledge test was consisted of nutrition, nutrients, weight control, food safety, and shopping tips by developing the table of specifications. The nutrition attitude test was comprised of seventeen questions for invention, self-efficacy, control, and outcome expectation. A total of 140 elderly living at home responded to both nutrition knowledge and attitude test. According to the results of nutrition knowledge test, the mean was 13.3 at the maximum 18 points and 51.4% respondents got more than 14 points. Significant differences were found with age (p<0.05, $x^2$=21.46), charge of income (p<0.05, $x^2$=8.86) and monthly expenses(p<0.05, $x^2$=22.95). The results of nutrition attitude test showed that the mean value of 40.89 points at the maximum 51 points and 58.6% of respondents rated more than 40.89 points. In exploring the relationship between the demographic variables(sex, age, educational level, and monthly expenses) and for attitude concepts, a significant correlation was found. Correlation among the knowledge for nutrition, nutrients, and the attitudes for nutrition was significant(p<0.05).

• 영재교육연구
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• 제20권2호
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• pp.503-526
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• 2010

본 연구에서는 과학적 창의력과 정서적 감수성의 관계를 알아보고자 고등학교 과학발명반집단(n=13)과 일반 고등학생집단(n=13)을 대상으로 정서를 유발하는 시각자극을 제시하고 뇌활동성을 기능성자기공명영상(fMRI)을 이용하여 분석하였다. 국내외 창의력 경진대회 수상자들을 중심으로 구성된 과학발명반집단은 창의적 성격검사(WKOPAY, SAM) 점수가 상위 96%이내였으며 일반집단은 보통 수준이었다. 정서를 유발하는 시각자극(IAPS사진) 제시 시 뇌활동성을 분석한 결과 과학발명반집단은 일반집단에 비해 중간측두이랑(MTG)과 상측두이랑(STG) 영역 등에서 뇌활동성이 높게 나타났다. 창의적 성격검사점수와 뇌활동성 간의 상관도를 분석한 결과 MTG, STG 영역 등에서 유의적인 상관도(p<0.005)를 나타내었다. 특히 흥분의 측면보다는 기분(유쾌/불쾌)의 측면에서 유의적인 상관도를 보이는 영역이 많았다. 이러한 결과는 과학적 창의력이 높은 학생들이 일반 학생들에 비해 정서적 감수성이 발달되어 있다는 점을 보여주는 것으로 과학영재교육 대상자의 선발과 교육프로그램에서 정서적 측면이 고려되어야 함을 시사한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.664-666
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• 2021

안티 드론은 불법적인 드론의 침입 및 활동을 감지하고 차단하는 장치를 의미하며, 불법 드론을 추락시키거나 공중에서 파괴시키는 기술을 포함하는 것으로서, 본 논문은 안티 드론 기술로 원격 드론 탐지에 따른 재밍의 영향성 분석한 것이다. 드론의 거리에 따라 재밍 신호의 영향이 달라질 수 있다. 삼각파의 발생으로 근거리에 있는 드론과 원거리에 있는 드론을 동시에 재밍을 할 수 있는 장점이 있으며, 최대 전력으로 송신하지 않음으로 배터리를 효율적으로 운용할 수 있는 효과가 있다. 또한, 원거리에서 재밍에 대한 영향을 받지 않더라도 근거리에서는 더욱 재밍 영향이 크므로 재밍에 대한 영향을 달리 받을 수 있는 장점이 있다.

• Journal of Information Science Theory and Practice
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• 제5권4호
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• pp.68-80
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• 2017

The invention of computers is one of the best things that have ever happened to mankind and undergraduate students can benefit immensely from the use of computers. However, observations have showed that in the present Nigerian society, there are a number of issues arising from unethical use of computers. Interactions with some undergraduate students revealed that a majority have fallen into the trap of unethical use of computers at one time or another. This seemingly alarming rate of unethical use of computers therefore calls for concern. A literature search has shown that awareness and perception of computer ethics have not been adequately researched within the Nigerian context. Thus, the main objective of this study was to examine the awareness and perception of computer ethics by undergraduate students in a Nigerian university. Descriptive survey research method was used and the study population was comprised of 12,894 undergraduate students of the University of Ibadan, Nigeria. The multistage random sampling technique was used to select a sample size of 292 and the questionnaire was used to collect data. Findings showed that the level of awareness of respondents on issues associated with computer ethics was high (mean=45.19). A majority of the respondents had a favorable perception of computer ethics and the most prominent factor identified that could hinder adherence to computer ethics as noted by most of the respondents was the poor economic situation of the country. Part of the recommendations was that government at all levels should provide responsible and responsive leadership.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 1998년도 특별강연 및 추계학술발표 개요집
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• pp.11-24
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• 1998

The invention of fusion wilding technology has brought on a revolutionary change in manufacturing industry which enables the construction of large scale high temperature plants in chemical, petrochemical and power generation industries. However, among the failure cases of high temperature components, premature failures of weldments have taken a large percentage that indicates the detrimental effect of welding on structural integrity. The accurate prediction of the high temperature behaviour of welded components is thus becoming increasingly important in order to realise an optimised design and maintenance of a plant life. In the present paper, recent research activities on high temperature behaviour of welded structures are briefly summarised. A local deformation measuring technique is proposed to determine the creep properties of weldment constituents. A damage mechanics approach is introduced to study the life reduction and ductility reduction due to the presence of a weld in high temperature structures. Finally, the high temperature creep crack growth in weldments is discussed.