네트워크분석을 위한 계산지모형

이호창 한국경영과학회 1994 經營 科學 Vol.11 No.1

In this paper we examine potentials of a spreadsheet program, one of the most widly available software system, as a mathematical optimization modeling tool. For an illustrative example, a shortest path problem is modeled on Lotus-123 for practical use and an implementational framework and a general guide to the spreadsheet modeling of network analysis is provided.

[특집: 과학기술혁명과 노동자계급] 소련에서의 과학기술혁명의 논의과정과 자본주의관의 변화에 대한 이론사적 검토

이호창 비판사회학회 1990 경제와 사회 Vol.- No.8

재생확률과정에 의한 최적 포장계획 수립에 관한 연구

이호창 한국경영과학회 1997 한국경영과학회지 Vol.22 No.2

We are concerned with the packing policy which determines the optimal packing of products with variable sizes to minimize the penalty costs for idle space and product spliting. Optimal packing problem is closely related to the optimal packet/record sizing problem in that randomly generated data stream with variable bytes are divided into a unit of packet/record for transmitting or storing. Assuming the product size and the production period are independently determined by renewal process, we can approximate the renewal process and formulate the optimization problem that minimize the expected packing cost for a production period. The problem is divided into two cases according to whether a product is allowed to split or not. Computational results for various distributions will be given to verify the approximation procedure and the resulting optimization problem.

Expression of immunohistochemical markers before and after neoadjuvant chemotherapy in breast carcinoma, and their use as predictors of response

이호창,고형석,설혜실,노동영,김태유,임석아,박인애,한원식 한국유방암학회 2013 Journal of breast cancer Vol.16 No.4

Purpose: For patients with breast carcinoma, immunohistochemicalmarkers are important factors in determining the breast cancersubtype and for establishing a therapeutic plan, including theuse of neoadjuvant chemotherapy (NACT). However, it is notclear whether the expression of certain markers changes afterNACT. Methods: We assessed estrogen receptor (ER), progesteronereceptor (PR), human epidermal growth factor receptor 2(HER2), Ki-67, p53, and Bcl-2 expression in specimens from 345breast cancer cases before and after NACT. We analyzed the associationbetween response to NACT and the expression of themarkers in pre-NACT specimens. We also compared the expressionbetween pre- and post-NACT specimens. Results: ER andPR expression was negatively associated with pathologicalcomplete response (pCR). HER2 was associated with pCR in allcases, but the association was lost when the cases were subdividedaccording to hormone receptor status. The pre-NACT tumorsize of cases with pCR after NACT was smaller than that ofcases with residual disease. HER2-enriched and triple-negativebreast cancers were more likely to achieve pCR than luminal Atype cancers. PR expression and the Ki-67 index decreased afterNACT. A decrease in the Ki-67 index was also demonstrated inhormone receptor positive and HER2-enriched subtypes, but nosimilar tendency was observed in the triple-negative subtype. Conclusion: A patient with breast cancer scheduled for NACTshould be assessed for the breast cancer subtype, as this will influencethe treatment plans for the patient. The expression of PRand Ki-67 after NACT should be interpreted carefully becauseNACT tends to reduce the expression of these molecules.

Mihai Eminescu의 神 詩,<Memento Mori>에 나타난 Dacia의 신화

이호창 한국외국어대학교(글로벌캠퍼스) 동유럽발칸연구소 2004 동유럽발칸연구 Vol.13 No.1

실리콘 웨이퍼 공급사슬관리 시스템 구축에 관한 연구 : (주) LG 실트론 사례를 중심으로

이호창,이동건 경희대학교 국제경영연구소 2004 국제경영연구 Vol.10 No.1

루치안 블라가의 『문화 삼부작 Trilogia Culturii』중 『지평과 양식 Orizont ?i Stil』에 대한 해석

이호창 아시아중동부유럽학회 2005 동유럽발칸학 Vol.7 No.1

루치아 블라가의 신화시극(神話詩劇), <자몰세 -이교의 신비->에 나타난 사상과 상징

이호창 아시아중동부유럽학회 2004 동유럽발칸학 Vol.6 No.1

Lucian Blaga was an eminent writer, but at the same time he was a famous philosopher. The purpose of this article is to illuminate thoughts and symbols included in his first 'mythological poetic drama', <Zamolxe -pagan mystery -> inspired by Geto-Dacian's supreme god, named Zamolxe and his religion. In this drama, ancient Zamolxe is reborn as a new character, like a poet who is on his mental journey to find a way through which human being and nature can communicate Stating "God is dead", Nietzsche expressed the gloomy of present age when we are neglecting 'the absolute value". In a similar way Blaga said in his philosophy-essay, "The destiny of our age is very tragic, because we need to have a new religion but we can not find a new god for this religion anywhere". Blaga's work was inspired by a myth of the ancient people of Dacia but it is basically a mirror which reflects our tragic ages. For us who have become slaves to the material values in complex societies, this work gives us an opportunity of self-examination, that is to contemplate the whole value of life. In addition, myth of 'The Great Blind", spoken by Zamolxe, which regards god, human and nature as one absolute existence, will make us to reflect on the absolute value of human that he should be. 블라가의 '신화시극(神話詩劇 teatru mitic şi poetic)'들 중에서 첫 번째로 발표된 작품인 <자몰세 -이교의 신비->는 루마니아의 고대 신화이자 종교였던 자몰세와 그의 사상에서 영감을 받고 이를 재구성하여 신과 인간과 우주의 관계를 철학적으로 조명하고 있는 작품이다. 블라가가 고대 신화 속의 자몰세를 자신의 신화시극 속에 불러들인 것은 현세의 불합리한 가치관들을 극복할 수 있는 초월자의 모습을 표현할 모형으로 삼기 위함이었다. 블라가는 자몰세의 삶에 독창적인 사건들을 가미하고 새로운 주변 인물들을 등장시킴으로 인류 역사를 전반적으로 암시하는 풍부한 상징들을 더했으며 그 속에 인류가 나아가야 할 바를 제시하는 새로운 사상들을 내포시켜 놓았다. 이 작품에 등장하는 각각의 인물들은 특정한 개인인 동시에 인간 사회 각 집단의 특징을 상징하는 인물들이기도 하다. 자몰세는 인간과 자연이 진정으로 소통할 수 있는 길을 찾기 위한 정신적 여정에 나선 목마른 시인인 동시에 존재의 절대 가치를 찾아내기 위해 끊임없이 고민하는 철학자의 모습으로 그려지고 있다. 마그사제는 자신의 권력만을 추구하려는 현대의 정치 권력가들 또는 보편종교의 배타적 성직자들과 다를 바 없는 모습을 지니고 있다. 마그사제의 친구인 주술사는 권력가들의 기득권을 유지시키기 위한 이념적 체계를 만들어 내거나 그것을 지지하는 역할을 수행하는 어용 지식인들을 나타낸다. 양치기는 지배 이데올로기의 대변자 역할을 하는 언론매체들의 모습과 유사한다. 보초서는 병사는 신념을 행동으로 옮기는 실천가나 사회 운동가를 상징하는 인물이다. 게보스는 비록 곱사등이라는 신체적 결함을 타고 났지만 세속적인 가치관들로부터 해방된 삶을 누리는 진정한 자유인이라 할 수 있다. 이 신화시극은 이들 등장인물들을 중심으로 두 개의 축을 이루는 갈등구도가 서로 엮이면서 사건들이 진행된다는 특징을 보인다. 갈등구도 중의 하나는 마그사제를 중심으로 야기되는 자몰세와 인간들 사이의 갈등에서 찾을 수 있으며 다른 하나는 자몰세가 스스로 겪고 있는 내면적 고뇌에서 발견할 수 있다. 자몰세와 인간들 사이의 갈등은 정신 중심의 가치관과 물질 중심의 가치관의 대립, 탈세속적 이상(理想)과 세속적 지배이데올로기의 대립 구도로 나타나고 있다. 자몰세의 내면적 갈등은 절대가치에 대한 끝없는 동경에서 출발하여 결국에는 그 절대가치를 위해 숭고한 희생을 치르는 것으로 막을 내린다. 이 작품은 복잡한 사회 속에서 물질적 가치관의 노예가 되어가고 있는 현대인들에게 삶의 총체적 가치를 되새길 수 있는 자기성찰의 계기를 제공할 수 있을 것이다.

퍼지의 사다리꼴 타입과 영상 단계적 분할을 이용한 동적 적응적 이진화 방법

이호창 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.5

This study proposes an improved binarization method to improve image recognition rate. The research goal is to minimize the information loss that occurs during the binarization process, and to transform the object of the original image that cannot be determined through the transformation process into an image that can be judged. The proposed method uses a stepwise segmentation method of an image and divides blocks using prime numbers. Also, within one block, a trapezoidal type of fuzzy is applied. The fuzzy trapezoid is binarized by dividing the brightness histogram area into three parts according to the degree of membership. As a result of the experiment, information loss was minimized in general images. In addition, it was found that the converted binarized image expressed the object better than the original image in the special image in which the brightness region was tilted to one side.

Investigation on Ultimate Strength of STS304L Stainless Steel Welded Connection with Base Metal Fracture Using Finite Element Analysis

이호창,김태수,황보경,조태준 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.4

Many studies on the application of stainless steels as structural materials in buildings and infra-structures have been performed thanks to superior characteristics of corrosion resistance, fi re resistance and aesthetic appeal. Experimental investigation to estimate the ultimate strength and fracture mode of the fi llet-welded connections of cold-formed austenitic stainless steel (STS304L) with better intergranular corrosion resistance than that of austenitic stainless steel, STS304 commonly used has carried out by authors. Specimens were fabricated to fail by base metal fracture not weld metal fracture with main variables of weld lengths according to loading direction. All specimens showed a block shear fracture mode. In this paper, fi nite element analysis model was developed to predict the ultimate behaviors of welded connection and its validity was verifi ed through the comparison with test results. Since the block shear behavior of welded connection due to stress triaxiality and shear-lag eff ects is diff erent from that of bolted connection, stress and strain distributions in the critical path of tensile and shear fracture section were investigated. Test and analysis strengths were compared with those by current design specifi cations such as AISC, EC3 and existing researcher’s proposed equations. In addition, through parametric analysis with extended variables, the conditions of end distance and longitudinal weld length for block shear fracture and tensile fracture were suggested.