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진리 함수로 분석한 『주역』 팔괘 - 「설괘전」을 중심으로 -
허진웅 ( Heo¸ Jin-woong ) 충남대학교 유학연구소 2020 儒學硏究 Vol.53 No.-
본 논문의 목적은 진리 함수의 논리로 『주역』 팔괘의 관계를 분석해보고, 그에 따른 유의미한 결과를 정리해 보는 것에 있다. 『주역』 팔괘의 관계를 가장 잘 나타내는 문헌은 「설괘전」이다. 「설괘전」에는 팔괘의 탄생 순서와 그들의 논리적 관계성이 상세히 저술되어 있다. 본 논문은 먼저 「설괘전」에 나타난 팔괘의 의미와 순서를 선천과 후천의 순서로 정리해보고 그 둘 사이가 분리된 관계가 아님을 밝힌다. 그리고 그 내용을 바탕으로 팔괘를 숫자로 변환하고 그들 사이에 진리 함수 관계를 대입하여 유의미한 결과를 분석한다. 팔괘를 분석하는 도구로 사용될 진리 함수는 선언과 연언이다. 선언과 연언은 두개 이상의 명제를 합성하였을 때 그 명제의 관계를 나타내는 논리 기호이다. 선언은 두 개의 명제가 복합문장을 이루었을 때 하나만 참이어도 복합문장이 참이 된다. 반면에 연언은 두 개의 명제가 복합문장을 이루었을 때 두 명제가 모두 참이어야만 복합문장이 참이 된다. 본 논문의 의미는 숫자의 관점으로 팔괘를 바라보고 그들 사이의 관계를 분석해보는 것에 있다. 또한 본 논문은 숫자관계로 분석해본 팔괘의 특징들을 「설괘전」의 내용과 비교해봄으로써 주역의 수학적 분석결과가 그 철학적 내용들과 전혀 유리되어있지 않음을 밝혀보려는 실험적인 시도를 포함하고 있다. 이러한 과정은 『주역』의 연구가 철학적 영역뿐만 아니라 수학적 영역에서도 가능할 수 있음을 보여주는 새로운 시도가 될 것이다. The purpose of this paper is to analyze the order relationship of the ‘Juyeok’ Eight Trigrams as the logic of the truth function and to summarize the meaningful results. The document that best describes the relationship between the Eight Trigrams is ‘Shuogua zhuan’. In ‘Shuogua zhuan’, the order of birth of the Eight Trigrams and their logical relationship are described in detail. This paper first summarizes the meaning and order of Eight Trigrams appearing in ‘Shuogua zhuan’ in the order of ‘Earlier Heaven’ and ‘Later Heaven’, and clarifies that the relationship between the two is not a separate relationship. Then, based on the contents, the Eight Trigrams are converted into numbers, and the relationship between the truth functions is substituted to analyze the meaningful results. The truth functions that will be used as tools to analyze the Eight Trigrams are disjunction and conjunction. When two or more propositions are synthesized, disjunction and conjunction are logical symbols representing the relationship between the propositions. In disjunction, when two propositions form a compound sentence, the compound sentence becomes true even if only one is true. On the other hand, in conjunction, when two propositions form a compound sentence, the compound sentence becomes true only if both propositions are true. The significance of this paper is to look at the Eight Trigrams from the perspective of numbers and analyze the relationship between them. In addition, this paper includes an experimental attempt to find out that the mathematical analysis results of the ‘Juyeok’ are not separated from the philosophical contents by comparing the features of the Eight Trigrams analyzed by numerical relations with the contents of ‘Shuogua zhuan’. This process will be a new attempt to show that the study of ‘Juyeok’ can be possible not only in the philosophical field but also in the mathematical field.
Fatigue Life Evaluation of Highway Bridge using the Proposed Simple Fatigue Evaluation Method
Jinwoong Choi,Min-Seok Park 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
The recent increase in truck traffic volume and overloading frequency causes a growing need to re-evaluation of fatigue life of steel bridges. However, the traditional fatigue analysis method, that is cumulative damage method(CDM), has limitation to apply to a number of bridges because the required calculation steps are very cumbersome and complicated. This study investigates the feasibility and applicability of proposed simple fatigue evaluation method based on the equivalent damage method (EDM) in Eurocode to estimate the remaining fatigue life for a highway bridge. The Proposed fatigue life evaluation method is as follows; 1. Calculation of fatigue resistance f and fatigue strength Δ used in design, 2. Calculation of partial safety factor f for equivalent stress range, 3. Calculation of stress range Δ2 using influence line, 4. Calculation of damage equivalent factor λ, 5. Review of Fatigue state and evaluation of fatigue life. The specifications of the target bridge are as follows; Location : Gyeongbu Expressway, Design Life : 100yr, Construction year : 2006, Total length : 341m, Type of superstructure : continuous steel box girder. The resulting remaining fatigue life estimated by both EDM and CDM have been compared. Remaining fatigue life of target bridge in 2016 was calculated 365yr(EDM using WIM data in 2014), 334yr(CDM using strain gauge data in 2012 and reflecting 2% annual traffic volume increase, Gil and Kang(2012)). As a result of comparison, The remaining fatigue life using proposed method(EDM) was evaluated about 10% higher than the CDM. This result, because traffic volume increase had not reflected when calculation of remaining fatigue life using EDM. Proposed method(EDM) can evaluate remaining fatigue life more easily and simply than CDM.
Proposed Simple Fatigue Evaluation Method using Damage Equivalent Factor and WIM Data
Jinwoong Choi,Min-Seok Park 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
Among the 8,700 in-service bridges in national highway, the steel bridges cover the 1600 sites and make up approximately the 20 percentage of the total amounts. Due to recent rapid increase both in traffic volume and in frequency of overloaded vehicles, the need for re-evaluating the fatigue life of the steel bridges is increasing. However, the existing fatigue life assessment method are too complicate and difficult to apply to field directly. To improve such deficiency of the existing fatigue life assessment procedures, this study reviews the fatigue life assessment methods in Eurocode and then proposes an easier and simpler fatigue life assessment procedure that could evaluate the remaining fatigue life of the steel bridges using traffic data collected from a high-speed weigh-in-motion system installed in the national highway network. The Proposed fatigue life evaluation method is as follows; 1. Calculation of fatigue resistance f and fatigue strength Δ used in design, 2. Calculation of partial safety factor f for equivalent stress range, 3. Calculation of stress range Δ2 using influence line, 4. Calculation of damage equivalent factor λ, 5. Review of Fatigue state and evaluation of fatigue life. The Proposed method can omit the existing complicated and repetitive calculation. Therefore, proposed method can estimate the fatigue damage and the theoretical fatigue life simply by comparing with the existing method.
[FCT 5] Three cases of cytopenia in patients during the azathioprine treatment for bullous disease
( Jinwoong Jung ),( Byungho Oh ),( Youngwook Ryoo ),( Sungae Kim ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.1
Azathioprine is an immunosuppressive drug that has been widely used in dermatology for the treatment of immunobullous diseases. Myelosuppression is the most important side effect that requires close observation of complete blood cell count. The clinical findings of myelosuppression include general weakness, poor oral intake, nausea, dyspnea and pallor. It can occur within several weeks to years after initial azathioprine treatment, so doing weekly full blood count for the first 4 weeks, followed by reduced frequency of monitoring to a minimum of once every 3 months is recommended. If the myelosuppression is not treated properly, it can cause fever, secondary infection, sepsis, even death. Herein, we present these 3 cases that are educational for dermatologists to keep in mind the risk of myelosuppression during azathioprine treatment.
[P400] A case of AIDS-associated kaposi`s sarcoma
( Jinwoong Jung ),( Sungae Kim ),( Byungho Oh ),( Youngwook Ryoo ),( Junil Kwon ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.1
Kaposi`s sarcoma (KS) is a neoplasm originating from vascular endothelial cells and classified as classical KS, endemic African KS, KS associated with immunosuppressive therapy, AIDS-related KS. AIDS-related KS progress rapidly and often involves nose, eyelid, ear and trunk. Involvement of the internal organs is much more common than the classical type, especially it can cause gastrointestinal obstruction or bleeding. Since highly active antiviral therpay(HAART) has become common, the incidence is decreased, but it is still the most common HIV-related neoplasm. A 51-year-old man visited our clinic with asymptomatic hyperpigmented plaques on left nose and lip for several months. He was diagnosed with kaposi`s sarcoma by skin biopsy. On that day, the patient visited the emergency room with mild dyspnea and was diagnosed with AIDS. AIDS was already progressed and he died of sepsis despite two weeks of antiviral therapy. We report a case of AIDS-associated Kaposi sarcoma found before the diagnosis of AIDS.
The electronic correlations in graphene standing on SrTiO₃ and platinum substrates
Jinwoong Hwang,Hyejin Ryu,Hwihyeon Hwang,Min-Jeong Kim,Ji-Eun Lee,Qin Zhou,Debin Wang,Ankit S. Disa,Jonathan Denlinger,Yuegang Zhang,Alessandra Lanzara,Sung-Kwan Mo,Choongyu Hwang 한국진공학회 2018 한국진공학회 학술발표회초록집 Vol.2018 No.2