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한용만(Yong-Man Han),박해윤(Haeyoon Park),윤광열(Gwangyeul Yun),유해영(HaeYoung Yoo) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.2B
현재 다양한 스마트 기기들이 등장하면서 많은 애플리케이션들이 개발되고 있다. 하지만 개발자 편의에 의해 사용자 요구사항 수집 및 분석이 미흡하거나 보안상의 문제가 지적되고 있으며 특히 고품질의 애플리케이션의 숫자는 극히 일부 한정되어 있다. 이러한 문제점이 대두되고 있는 이유는 모바일 기반의 소프트웨어에 대한 품질 평가에 대한 명확한 표준안은 제시되지 않고 있다는 점이다. 본 논문에서는 기존의 ISO/IEC 25000에 대한 연구를 기반으로 AHP(analytic Hierarchy Process)기법을 적용하여 알맞은 품질특성을 도출하였다. 이를 통해 모바일 소프트웨어 개발 시 우선순위를 토대로 요구사항 분석 및 설계에 반영하여 고품질의 애플리케이션 개발이 가능하다.
한용만(Yong-Man Han),유해영(Hae-Young Yoo) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.1B
새로운 비즈니스 환경 변화에 가장 빠르게 대응할 수 있는 최적의 대안으로 각광받고 있는 SOA(Service Oriented Architecture)는 현재 비즈니스 시장의 혁신과 변화를 주도하고 있다. 하지만 웹 기반인 SOA 기반 시스템은 품질평가에 대한 명확한 표준안이 제안되어 있지 않으며, 기존 소프트웨어 품질 평가를 통한 SOA 기반 시스템의 평가는 적절하지 않다. 본 논문에서는 기존 소프트웨어 품질 특성인 ISO/IEC 25000을 연구하고, AHP(Analytic Hierarchy Process) 기법을 통하여 SOA 기반 시스템에 알맞은 품질 특성을 도출하였다. 이를 통하여 SOA 기반 소프트웨어 개발 시 우선순위를 토대로 요구사항 분석이나 설계에 반영하여 최적화된 SOA 기반 시스템 구축이 가능하다.
한용만(Yong Man Han),김진순(Chin Soon Kim) 대한공업교육학회 1992 대한공업교육학회지 Vol.17 No.2
The purpose of this study was to develop and verify the effectiveness of a programmed instructional material for the Projection Drawing of industrial technology subject at middle school. The programmed instructional material was developed through the process of learning task analysis(instructional objectives and learning task hierarchy), decision of instructional material style(type and process), and programmed item development. Through the expert evaluation and preliminary test, 86 final items were selected and revised from 95 total raw items. The developed programmed instructional material was applied to two actual classes(102 students) of middle school located in Seoul. In order to find the effetiveness of the programmed instruction, a questionaire was used and analyzed. The main findings of the study were as follows: 1. The programmed instruction at industrial technology subject enhenced very positively student`s interest and attitude about the subject. 2. The programmed instruction was more effective in learning achievement of cognitive and affective domain than psychomotor domain in teaching the projection drawing of industrial technology subject. 3. If a certain learning unit would be easely analyzed into hierarchical knowledge element. The programmed instruction method would be recommendable.
Zea mays 불검화추출물을 함유하는 정제의 제제설계 및 평가
한용해,정연복,한건,정석재,박만기,심창구,Han, Yong-Hae,Chung, Youn-Bok,Han, Kun,Chung, Suk-Jae,Park, Man-Ki,Shim, Chang-Koo 대한약학회 2000 약학회지 Vol.44 No.6
The purpose of the present study was to design and prepare the optimum formulation for the oral administration of titrated extract of the unsaponifiable fraction of Zea mays L. (ETIZM). For this purpose, we simulated the blood concentration of ETIZM after its oral administration, changing the dissolution rate constants $(0.05{\sim}20\;hr^{-1})$. In vivo parameters, such as absorption rate constant $(k_a)$, elimination rate constant (k) and volume of distribution (Vd), were incorporated in the simulation on the basis of the experiments and literatures. When the dissolution rate constant $(k_r)$ is over $5\;hr^{-1}$, the absorption process appears to be the rate limiting step for the transport of ETIZM from the G.I. ract to the blood circulation. While less than $5\;hr^{-1}$, the dissolution rate considered to be the rate limiting step. Moreover, the optimum blood concentration was shown in the range from 1 to $5\;hr^{-1}$ of $k_r$ in the simulation. To design and prepare the tablets on the basis of the above results, 7 formula containing HPMC, PEG 4000 and PEG 6000 (1-5%, respectively) were prepared and evaluated. The tablets containing PEG 4000 (1%), PEG 6000 (1%) or PEG 4000 (5%) satisfy the optimum $k_r$ range ($1-5\;hr^{-1}$). These formulations, therefore, will be able to show the more effective blood concentration, compared with the commercial products after the oral administration.
상온에서 RF 스퍼터링 방법으로 증착한 Hafnium Oxide 박막의 저항 변화 특성
한용,조경아,윤정권,김상식,Han, Yong,Cho, Kyoung-Ah,Yun, Jung-Gwon,Kim, Sang-Sig 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.9
In this study, we fabricate resistive switching random access memory (ReRAM) devices constructed with a Al/$HfO_2$/ITO structure on glass substrates and investigate their memory characteristics. The hafnium oxide thin film used as a resistive switching layer is sputtered at room temperature in a sputtering system with a cooling unit. The Al/$HfO_2$/ITO device exhibits bipolar resistive switching characteristics, and the ratio of the high resistance (HRS) to low resistance states (LRS) is more than 60. In addition, the resistance ratio maintains even after $10^4$ seconds.
Fenbendazole의 항암활성에서 활성산소종의 관련성
한용,주홍구,Han, Yong,Joo, Hong-Gu 대한수의학회 2020 大韓獸醫學會誌 Vol.60 No.2
Fenbendazole (FBZ) is a benzimidazole anthelmintic that has been widely used in treatments for gastrointestinal parasites including pinworms and roundworms in animals. Recently, some studies demonstrated that FBZ has anti-cancer effects related to disruption of microtubule polymerization. In this study, we investigated whether FBZ has anti-cancer activity in HL-60 cells, a human leukemia cell line, and assessed its relationship with the production of reactive oxygen species (ROS). FBZ treatment at 0.25-1 μM significantly decreased the metabolic activity of HL-60 cells. The mitochondrial membrane potential of FBZ-treated HL-60 cells decreased in a concentration-dependent manner. Apoptosis analysis using annexin V-FITC/propidium iodide staining demonstrated that 1 μM FBZ increased the percentages of cells in apoptosis and necrosis. In addition, Hoechst 33342 staining showed the presence of broken nuclei in HL-60 cells treated with 0.5 and 1 μM FBZ. To investigate the anti-cancer mechanism of FBZ, HL-60 cells were treated with FBZ in the absence or presence of N-acetyl cysteine (NAC), an inhibitor of ROS production. NAC significantly recovered the decreased metabolic activity of HL-60 induced by 0.5 and 1 μM FBZ treatments. This study provides evidence that FBZ has anti-cancer activity in HL-60 cells provided, in part, via ROS production.