• Journal of the Korean Statistical Society
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• v.16 no.2
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• pp.117-127
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• 1987

The Simpson's paradox is a paradoxical phenomenon which might occur when analyzing $2 \times 2$ contingency table. This paper considers the role of probability assignment of the experimental units in reducing the chances of Simpson's paradox. Numerical results are given to illustrate how the chance of Simpson's paradox behaves.

• The Korean Journal of Applied Statistics
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• v.25 no.4
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• pp.543-552
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• 2012

Parrondo paradox is a counter-intuitive phenomenon where two losing games can be combined to win or two winning games can be combined to lose. When we trade stocks with a history-dependent Parrondo game rule (where we buy and sell stocks based on recent investment outcomes) we found Parrondo paradox in stock trading. Using stock data of the KRX from 2008 to 2010, we analyzed the Parrondo paradoxical cases in the Korean stock market.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.05a
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• pp.368-368
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• 2009

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1995.11a
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• pp.307-313
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• 1995

본 논문에서는 기존에 제안된 이동통신용 키분배 방식의 문제점을 분석하고, Girault가 제안한 자체인증 공개키(Self-certified public keys) 개념을 이용한, 인증자에 기반을 둔(Certification-based) 방식이 아닌 개인식별정보에 기반을 둔(Identity-based) 방식이면서도 사용자가 자신의 비밀키를 선택할수 있는, 이동 퉁신망에 적용가능한 "역설적인" ID-based 키분배 방식을 제안한다. 제안한 방식의 안전성은 고차 잉여류 문제(${\gamma}$$^{th}$ -residuosity problem)와 이산대수(discrete logarithm) 문제에 근거한다. 문제에 근거한다.

• Korean Journal of Biological Psychiatry
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• v.26 no.2
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• pp.33-38
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• 2019

Psychiatric disorder as dysfunctional behavioural syndrome is a paradoxical phenomenon that is difficult to explain evolutionarily because moderate prevalence rate, high heritability and relatively low fitness are shown. Several evolutionary genetic models have been proposed to address this paradox. In this paper, I explain each model by dividing it into selective neutrality, mutation-selection balance, and balancing selection hypothesis, and discuss the advantages and disadvantages of them. In addition, the feasibility of niche specialization and frequency dependent selection as the plausible explanation about the central paradox is briefly discussed.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 1997.11a
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• pp.203-210
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• 1997

Reports of explosions in cargo and storage tanks of high flash point liquids such as residual fuel oil, asphalt, and oily waste water have shown that these explosions have occurred even when the liquid temperatures are well below the liquid nominal flash point. The reasons for these seemingly paradoxical explosions are reviewed and results of recent laboratory tests are presented to better define the conditions leading to flammable vapor atmospheres in these tanks. The potential effectiveness of various prevention measures are discussed including inerting, monitoring tank vapor concentrations, and periodic cleaning of condensation and deposits on the tank walls and roof.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.4 no.2
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• pp.90-118
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• 1994

본 논문에서는 certificatoin-based 방식이 아닌 id-based방식이면서도 사용자가 자신의 비밀키를 선택할 수 있는 역설적인 id-based 방식을 제안한다. 제안한 방식은 Girault가 제안한 self-certified공개키 개념을 id-based방식에 적용한 것이다. 제안한 방식의 안전성은 고차잉여류 문제와 이산대수 문네에 기반을 두고 있다.

• Journal of the Korean Society of Costume
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• v.55 no.2 s.92
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• pp.92-104
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• 2005

This study aimed to reveal the concept and background of emergence of black leather jacket that began appearing in full-scale among youth sub-culture from 1950's, and to research its styles and aesthetic features on the basis of that. The researcher has intended to a theoretical frame to recreate black leather jacket which has been developing in youth sub-culture style as a resource of new design in modern fashion trend through this study There are 5 styles of black leather jacket in youth sub-culture after 1950's. Firstly, biker style black leather jacket showed ruined war heroes substituting for military uniform. Secondly, rocker style black leather jacket brought the conversion in definition of masculinity. Thirdly, greaser style black leather jacket showed the beauty of uncleanness expressing resistance and violence with tattered dirty materials and excessive metal ornaments. Fourthly, headbanger style black leather jacket was prominent in various and compound decoration due to combination of rocker and hippie features. fifthly, punk style black leather jacket was influenced greatly by Sex Pistols. There are broadly three ecstatic features oi black leather jacket among youth sub-culture. With regard to displaying terrorism, black leather jacket displayed threatening aspects with black color, formative beauty of inverted triangle, additional decoration, and animal & brutal feelings. Paradoxical trophyism showed Nihilism, disorder, and resistance through black color that symbolize bad luck and unstability, trophyism with bad flavor, tattered material effect, and destructive message painting. Masculine eroticism appeared in accordance with pursuing after pleasure and masculine sexuality through exposure of buttocks and focused penis due to jacket's short length, and fetish of black.

• Journal of Veterinary Clinics
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• v.24 no.4
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• pp.613-617
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• 2007

A 1-year-old castrated male Maltese dog(weighing 2.4 kg) was presented with primary complaints of occasional coughing, dyspnea and exercise intolerance. Based on diagnostic findings including paradoxical split S2, diastolic regurgitant murmur, marked dilation of pulmonary artery, right ventricular eccentric hypertrophy with thickening of ventricular septum, severe tricuspid and pulmonic regurgitation(5.4 m/sec and 3.4 m/sec, respectively) and the absence of any congenital intracardiac shunting, obstructive pulmonary diseases and systemic diseases associated with right ventricular pressure overload or pulmonary hyperperfusion, the case was tentatively diagnosed as primary pulmonary hypertension. The dog was treated with furosemide, aspirin and oxygen supplementation. This case report described a rare case of primary pulmonary hypertension in a Maltese dog.

• Tuberculosis and Respiratory Diseases
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• v.51 no.3
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• pp.270-274
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• 2001

A functional upper airway obstruction due to a vocal cord dysfunction(VCD) is characterized by a paradoxical adduction of the vocal cords throughout the respiratory cycle with no obvious organic cause for the obstruction. It commonly occurs paroxysmally and imitates acute asthmatic attacks, often in patients with coexisting asthma. They present with episodes of dyspnea associated with inspiratory wheezing that persists despite conventional asthma treatment and a flattening of the inspiratory limb of the flow-volume curve ; an adduction of the vocal cord during inspiration. Failure to recognize concurrent vocal cord dysfunction and asthma has led not only to the excessive use of bronchodilators and corticosteroids, but also to intubation and tracheostomy. Here, we report a case of coexistent obstructive pulmonary disease and functional upper airway obstruction due to a vocal cord dysfunction where a bronchoscopy showed a paradoxical vocal cord motion and typical features of a variable extrathoracic obstruction and a lower airway obstruction on the Flow-volume loop during a symptomatic period.