Micro-rotors in Nematic Liquid Crystal Films with a Free Surface

최현희 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.1

Thermocapillary flow is defined as the mass transfer through the interface of two materials due to the surface tension gradient arising from temperature differences. Circular thermocapillary flow, in particular, has been reported at a free surface in homeotropically oriented nematic liquid crystals. Here, we present a detailed discussion on its coupling properties with the director field and the topographical structure at the free surface in a nematic liquid crystal. We also suggest its significance to every applicable field concerning material transport and manipulation in fluidic devices and methods.

서비스시간이 얼랑분포를 따르는 M/G/1 대기모형의 최적운영정책

최현희,안정수,배종호 한국자료분석학회 2019 Journal of the Korean Data Analysis Society Vol.21 No.5

본 논문은 고객의 서비스시간이 얼랑분포를 따를 때 M/G/1 대기모형의 최적운영정책을 다루고 있다. 이 연구에서는 M/G/1 대기모형에 두 개의 상반된 비용구조를 설정한다. 우선 M/G/1 대기모형에서 작업부하량을 수용할 수 있는 최대 크기를 K로 설정하는데, K의 값에 비례하여 기본수용공간 유지비용이 발생한다고 가정한다. 그리고 작업부하량이 K를 초과하면 추가로 공간을 대여하여 수용공간의 부족을 해결하는데 수용공간을 한번 대여할 때마다 비용이 발생한다고 가정하는데, 이 비용을 추가수용공간 대여비용이라 부를 것이다. 이러한 비용구조 하에서 K를 크게 설정하면 기본수용공간 유지비용은 증가하지만 대여하는 상황이 드물게 발생하여 추가수용공간 대여비용은 감소할 것이고, K를 작게 하면 그 반대가 된다. 이 연구에서는 K의 값에 따라 상반되게 움직이는 두 비용의 합을 최소화 하는 K를 찾을 것이다. 이러한 최적운영정책을 찾기 위하여 총비용을 계산해야 하는데 이를 위해 오버슛의 분포에 대한 근사식을 이용하는 것이 필수적이다. 선행연구에서 이루어진 근사식을 활용하여 최적의 K 값을 찾고 이를 적용할 때 시스템 운영의 최적화와 얼마나 가까운지 검증하는 것이 이 논문의 주제이다. It is considered an optimal policy of the M/G/1 queueing model with Erlang service time. Two kinds of cost are assumed. One is for maintaining the maximum capacity K of workload and the other is for rental of extra capacity of workload. The larger the operator sets K, the larger the maintaining cost becomes and the smaller the rental cost becomes. In this study, it is derived the long-run average cost per unit time using some approximations proposed in the preliminary studies. The focus of this study is to show that finding K which minimizes the approximated cost function is very similar to the optimal policy of operating the system. At first, it is showed that the evaluated cost function using the approximation is similar to the cost function which is estimated by simulation, and secondly it is provided the difference between the values of K* and K** which minimizes the approximated cost function and simulated cost function, respectively. Finally, the values of cost functions at K=K* and K=K** are compared, which are revealed very similar.

「80년대 ‘무크 문학’의 언어 풍경과 문학의 윤리」 토론문

최현희 한국현대문학회 2014 한국현대문학회 학술발표회자료집 Vol.2014 No.8

모더니즘론의 탈식민주의적 전환과 그 가능성 : 최근 한국 현대문학 연구에 있어 모더니즘의 역사화 경향 과 식민지 모더니즘

최현희 이화여자대학교 이화인문과학원 2024 탈경계인문학 Vol.17 No.1

이 글은 2015년을 전후하여 한국 현대문학 연구 분야에 나타난 모더니즘론의 역사화 경향을 셋으로 정리하고 이 중 모더니즘 자체의 식민성을 탈식민주의적으로 읽어내는 경향을 집중적으로 고찰한다. 이 경향은 한국적 맥락에서 모더니즘이 세계성, 보편성, 서양중심성과 친연성이 높은 개념이었다는 점에 주목하는 데서 출발한다. 이러한 모더니즘의 식민지성에 대한 비판적인 검토가 모더니즘의 탈식민적 가능성을 발견하는 데로 이어지는 통로를 제시하고, 마지막으로 모더니즘 문학론을 탈식민주의적으로 전개할 수 있는 구체적 방법으로 이상, 최재서, 임화에 대한 식민지 모더니즘적 해석의 방법을 제시하고자 한다. Since around 2015, there has been a remarkable shift in modern Korean literary studies toward reinterpreting modernism. Traditionally viewed as opposing the ideologically engaged and realistic tendencies in literature, modernism is being reevaluated through three new lenses. Firstly, the realism versus modernism dichotomy is increasingly seen as a construct emerging from the narrative act of literary historiography, rather than an objective historical fact. Secondly, this period challenges the perceived autonomy of modernist literature from reality by highlighting its direct links to the socio-political and material conditions of its time. Thirdly, within the Korean context, attention is drawn to modernism’s affinity with globality, universality, and Western centrism, advocating for a post-colonial interpretation of modernism’s colonial aspects. Building on this framework, this article delves deeper into the post-colonial critique of modernism’s colonial dimensions, starting with an examination of the New Modernist Studies as a theoretical backdrop. It further investigates the notion of colonial modernism through Choe Hyonhui’s recent work, aiming to highlight the decolonial potential within modernism. By proposing interpretative methods for the colonial modernist readings of Yi Sang, Ch’oe Chaesŏ, and Im Hwa, this article explores new possibilities for the historicization of modernism in modern Korean literary studies.

척수손상 환자를 위한 IT기반 신체활동 및 운동 프로그램 연구

최현희 한국컴퓨터정보학회 2022 韓國컴퓨터情報學會論文誌 Vol.27 No.2

This study is to encourage physical activity and exercise in people with spinal cord disabilities so that they can have a positive effect on health outcomes. Current evidence shows that IT-based muscle strength and muscle endurance, cardiopulmonary exercise, electrical stimulation exercise, and robot exercise can all improve physical components, reduce the risk of secondary health complications, and have a positive impact on the overall health of people with chronic physical disabilities. To improve muscle strength and muscle endurance, exercise frequency should be conducted twice and three sets a week, <5 Reps to improve muscle strength, general strength should be repeated 6 to 15 times, and 15 to 30 times to improve muscle endurance. In order to improve cardiopulmonary ability, it should be conducted 3-5 times a week, 20-60 minutes, and 50-80% of the maximum heart rate. Therefore, higher resource investment is needed to realize various IT-based exercise benefits and access professional equipment, facilities and trainers. 척수장애인들에게 있어 신체활동 및 운동을 장려함으로써 건강 결과에 긍정적인 영향을 미칠수 있도록 하는 것이 중요하다. 현재 증거에 따르면 IT기반으로 하는 근력 및 근지구력, 심폐 운동, 전기 자극 운동과 로봇 운동 등 모두 체력 구성 요소를 개선하고 2차 건강 합병증의 위험을줄이며 만성 신체 장애가 있는 사람들의 전반적인 건강에 긍정적인 영향을 미칠 수 있다. 근력및 근지구력을 증진하기 위해서는 운동 빈도는 주 2회, 3세트 실시하도록 하며 근력의 증진을 위해서는 < 5 Reps으로, 일반적인 강도는 6~15회 반복하도록 하며, 근지구력을 향상시키기 위해서는15~30회 반복하도록 한다. 심폐 능력의 향상을 위해서는 주 3-5회, 20~60분, 최고심박수의 50~80% 로 실시하도록 하였다. 따라서 IT 기반의 다양한 운동 이점을 실현하고 전문 장비, 시설 및 트레이너에 대한 접근을 위한 더 높은 자원 투자가 필요하다.

Jansen Mechanism을 이용한 보행로봇의 전산설계와 Line Tracing을 이용한 자율주행

최현희 (사)한국CDE학회 2017 한국CAD/CAM학회학회지 Vol.23 No.2

당뇨발과 동반된 중증 허혈성 하지에서의 다각적 접근 방법의 치료

최현희,김갑래,이재희,이의수,Choi, Hyun-Hee,Kim, Gab-Lae,Lee, Jae-Hee,Lee, Eui-Soo 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.1

Purpose: The purpose of this study is to evaluate treatment results of multidisciplinary approach of critical ischemic limb with diabetic foot. Materials and Methods: From March 2005 to March 2012, 674 diabetic foot patients were analyzed. Among them, 85 patients were neuroarthropathic type, 383 patients were infectious type, and 206 patients were ischemic type. The subjects were 206 patients who had critical ischemic limbs and major or minor amputations were done. Various single or combined treatment method before amputation was performed. We investigated their ABI, HbA1c, main occlusion lesion, limb salvage and hospitalization period by various treatment method. Results: Major amputation was 27 cases, minor amputation was 179 cases. Mean HbA1c was 8.2%, and mean ABI was 0.66. Main occlusion lesion was 6 cases at common iliac artery, 13 cases at external iliac artery, 9 cases at internal iliac artery, 11 cases at common femoral artery, 23 cases at deep femoral artery, 52 cases at superficial femoral artery, 35 cases at popliteal artery, 40 cases at posterior tibia artery, 35 cases at anterior tibial artery, 28 cases at peroneal artery, and 13 cases at dorsalis pedis artery. Major amputations were decreased, minor amputations were increased, and hospitalization period was reduced by treatment of multidisciplinary approach. Conclusion: Treatment of multidisciplinary approach, which include preoperation percutaneus transluminal angioplasty, vascular surgery, and amputation, of critical ischemic limb with diabetic foot had advantages of limb salvage and hospitalization period reduction.

(탈)식민의 역사주의에서 언어적 전회로 2000년대 이후 이태준 연구의 방법과 논리

최현희 상허학회 2014 상허학보 Vol.42 No.-

This paper critically examines Yi T’aejun studies during the decade from 2004 to 2014 from the vantage point of the Linguistic Turn. Since the mid-2000s, the mainstream of modern Korean literature field has been under considerable influence of Post-colonialism studies and Cultural Studies. Korean literature scholars in the trends regard Literature not as a given but as a historically constructed discourse. The transition from the former to the latter is what I call the strategical turn from the Literature to the Discourse. Yi T’aejun studies from the last decade substantialize this turn in their analyses with the problematique of Hybridity and Language Consciousness. However, the turn remains incomplete as they see an immediate reflection of the Reality from Yi T’aejun texts’ hybridity and passive resistance against the Reality from the perversity of Yi’s theory of “Munjang” [sentence, language, or words]. They originally intended to describe how modern conception of Literature is contingent on particular historical context at the Linguistic Turn. However, they find themselves trapped in, if not unconsciously endorsing, Historicism, which is discursively rendering Literature as a given. Their initial conscious intention to overcome Historicism in literary studies remains unfulfilled as they unconsciously assert their own version of Reality as the only tenable reality on the hermeneutic horizon of the History. Here, students of modern Korean literature must learn the following ironic lesson: that literary studies are allowed to achieve historicity when they thoroughly accomplish the task of the Linguistic Turn and confine themselves strictly to the level of Discourse. 이 글은 2000년대 중반부터 2014년 현시점까지의 이태준 연구의 경향을 ‘언어적 전회’의 관점에서 비판적으로 고찰한다. 탈식민주의와 문화연구의 흐름에 견인된 2000년대 중반의 한국근대문학 연구는 ‘문학’을 소여(所與)로 보지 않고 역사적으로 구성된 ‘담론’으로 보는 관점을 취한다. ‘문학’으로부터 ‘담론’으로의 전회라는 방법론상의 자각은, ‘혼종성’과 ‘언어의식’을 해석학적 지평으로 삼아 분석한 이태준 연구들로 실체화되었다. 그러나 이들 연구들은 궁극적으로, 이태준 텍스트의 혼종적 면모를 당대 ‘현실’의 무매개적 반영으로 보거나, 문장론에서 나타나는 ‘문장’ 개념의 전도성을 ‘현실’에 대한 저항으로 보는 한계를 보인다. 이는 ‘문학’ 자체의 역사성을 기술하려고 했던 엄밀한 객관주의 정신이, 자기가 인식한 ‘현실’만이 ‘역사’의 보증을 받는 유일한 버전의 현실임을 강요하는 역사주의로 빠져버렸음을 의미한다. 결국 ‘문학’ 자체의 존재를 담론적으로 정당화하는 역사주의 극복이라는 과제는 아직 완수되지 못한 채로 남는다. 이는 한국근대문학 연구가 ‘역사성’을 회복하기 위해서는 더욱 ‘담론’ 차원에의 집중을 철저히 할 필요성이 있음을 알려준다.

Optimal sampling frequency for high frequency data using a finite mixture model

최현희,강문수 한국통계학회 2014 Journal of the Korean Statistical Society Vol.43 No.2

Advances in IT technology have led to the feasibility of high frequency sampling for stockprice data in financial time series. A standard approach to obtaining a sampling cycle isto calculate n by minimizing the mean squared error (MSE) which is not appropriate for anonlinear time series mixture and does not account for the number of parameters includedin a model and targeted statistical power. The objective of this article is to show twomethods for the calculation of optimal sampling frequency under the framework of a finitemixture model. First we investigate how sampling frequency can be obtained through amodified likelihood ratio test to obtain a designated statistical power. Second, we proposea new method based upon the minimization of AICc with a penalty for the number ofparameters. Numerical studies show that it performs better than other methods.

도산절차에서의 개별적 근로관계에 관한 검토

최현희 노동법이론실무학회 2010 노동법포럼 Vol.- No.4

Act on Rehabilitation and Bankruptcy of Debtors (which is called Consolidated Insolvency Act) came into effect in April 2006 and insolvency proceedings are classified into the process of rehabilitations and bankruptcy procedure. This paper reviews how the insolvency proceedings impact with the employment relation. Consolidated Insolvency Act isn't directly stipulated by law, we need to interpret the relevant regulations. However, it is not easy to interpret harmoniously, by reason of different legislation to modify the purpose and principles of civil law. The legal profession and scholars in the field of insolvency proceedings deal with these issues, but scholars in the field of labor law did not focus on them. The application of the labor law isn't excluded in special circumstances like an insolvency proceedings and it isn't fair that both the employer and employee have the responsibility of obeying the employment contract. For this reason, it is necessary to interpret the individual employment relations during insolvency proceedings. This paper make a study in order to find out how the principles of labor law, which is to protect the employees, embody in the Consolidated Insolvency Act, and if this process has a limitation of legal or not.