IEEE 1516 HLA/RTI 기반 연동 시뮬레이션을 위한 연동 어댑터의 설계 및 구현

홍정희,성창호,안정현,김탁곤,Hong, Jeong-Hee,Sung, Chang-Ho,Ahn, Jung-Hyun,Kim, Tag-Gon 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.1

Interoperation between heterogeneous simulators employs definition of standard protocols for data exchange and time synchronization among simulators. The High Level Architecture(HLA) is a specification of common services for such interoperation, which is approved as IEEE standard 1516. This paper presents the design and implementation of an interoperable adaptor which supports development of interoperable simulators under the IEEE 1516 HLA/RTI environment. The adaptor, KHLAAdaptor1516, is implemented as a library form which is linked to HLA-compliant simulators. Design of the adaptor employs a protocol conversion method, the model of which is finite state machine. KHLAAdaptor1516 allows developers to separate interoperable adaptors from stand-alone simulators. The interoperable adaptor manages mapping between HLA services and simulation messages for simulator, This separation increases robustness of a federation and reusability of simulators as well as alleviates much effort and time for maintenance.

IEEE 1516 HLA/RTI 표준을 만족하는 시간 관리 서비스 모듈의 설계 및 구현

홍정희,안정현,김탁곤,Hong, Jeong-Hee,Ahn, Jung-Hyun,Kim, Tag-Gon 한국시뮬레이션학회 2008 한국시뮬레이션학회 논문지 Vol.17 No.1

The High Level Architecture(HLA) is the IEEE 1516 standard for interoperation between heterogeneous simulators which are developed with different languages and platforms. Run-Time Infrastructure(RTI) is a software which implements the HLA Interface Specification. With the development of time management service of RTI, it is necessary to consider an efficient design approach and an algorithm of Greatest Available Logical Time(GALT) computation. However, many time management services of existing RTIs have difficulty in modification and extension. Although some RTIs avoid this difficulty through modular design, they comply with not IEEE 1516 HLA/RTI but HLA 1.3. In addition, a lot of RTIs made use of well-known Mattern's algorithm for GALT computation. However, Mattern's algorithm has a few limitations for applying to IEEE 1516 HLA/RTI. This paper proposes a modular design and an implementation of time management service for IEEE 1516 HLA/RTI. We divided th time management service module into two sub-modules: a TIME module and a GALT module and used Mattern's algorithm improved for IEEE 1516 HLARTI. The paper also contains several experimental results in order to evaluate our time management service module. HLA는 이기종 시뮬레이터간의 연동을 위한 상위레벨 개념으로서 IEEE 1516 표준이며 Run-Time Infrastructure(RTI)는 이를 구현한 라이브러리 형태의 소프트웨어이다. RTI의 시간 관리 서비스를 개발함에 있어 효율적인 설계와 GALT 계산 알고리즘은 반드시 고려해야 하는 사항이다. 그러나 기존의 많은 RTI의 시간 관리 서비스는 수정과 확장이 용이하지 않다. 몇몇 RTI가 이러한 단점을 극복하기 위하여 모듈화 설계방안을 제안하고 있지만 이들은 IEEE 1516 HLA/RTI에 적합하도록 설계 및 구현된 것이 아니라 HLA 1.3을 위한 것이었다. 많은 RTI는 GALT 계산 알고리즘으로 분산 시뮬레이션에서 널리 알려진 Mattern의 알고리즘을 이용하고 있다. 그러나 Mattern의 알고리즘을 IEEE 1516 HLA/RTI에 적용시키기에는 몇 가지 제약사항이 존재한다. 본 논문은 IEEE 1516 HLA/RTI를 만족하는 시간 관리 서비스의 모듈화 설계를 제안하고 이를 바탕으로 구현한다. 시간 관리 서비스 모듈을 TIME 모듈과 GALT 모듈로 나누는 설계방안을 제안하고 GALT 계산 알고리즘으로는 Mattern의 알고리즘을 수정 보완하였다. 그리고 제안한 설계방안대로 구현한 시간 관리 서비스 모듈의 성능을 살펴보기 위하여 실험을 수행하고 그 결과를 분석하였다.

The Cleanliness of Parts and Components of Fluid Systems in Automotive, Hydraulics and Aerospace complying with ISO16232, ISO18413 and ISO 12345

홍정희,마이크 데이,Hong, Jeong-Hee,Day, Mike The Korean Society for Fluid Power and Constructio 2012 드라이브·컨트롤 Vol.9 No.2

In order to improve the life and reliability of fluid components used in the Automotive, Hydraulics and Aerospace industries, the cleanliness of the system parts and components before their assembly into the system is being addressed. The measurement of components and parts cleanliness is related to contaminant collection, analysis and data reporting and ISO Standards are continually being developed to control procedures. This Paper explains the processes in these standards and explains how similar procedures have been adapted to suit the requirements of the above Industries. It also gives guidance and recommendations on the implementation of these standards, so that the best use can be made of them.

Monitoring of Cleanliness Level in Hydraulic Systems: Obtaining Reliable On-Line data

홍정희,마이크 데이,Hong, Jeong-Hee,Day, Mike The Korean Society for Fluid Power and Constructio 2012 드라이브·컨트롤 Vol.9 No.2

Monitoring of system cleanliness levels and counting of particulate contaminant are fundamental to achieving hydraulic system reliability as any departure from the specified cleanliness level is often a precursor to future failures. On-line monitoring of cleanliness levels has the advantage of giving data both very quickly and accurately as environmental influences are eliminated. In this way, corrective actions can be promptly implemented. Most on-line instruments are sensitive to system conditions to a greater or lesser extent, but Automatic Particle Counters (APCs) working on light extinction principles are especially sensitive to the presence of optical interfaces caused by such conditions as fluid mixtures, emulsions, free water and air bubbles. These conditions give erroneous data and can result in drawing incorrect conclusions, wasting maintenance time and ultimately, reduced user confidence in cleanliness monitoring. This paper describes such conditions and shows how the correct selection of the analysis technique can result in reliable cleanliness level data.

체계 효과도 분석을 위한 공학/교전 모델 연동 시뮬레이션 기술 연구

홍정희,김탁곤,Hong, Jeong-Hee,Kim, Tag-Gon 한국시뮬레이션학회 2010 한국시뮬레이션학회 논문지 Vol.19 No.4

Effectiveness analysis of weapon system has been accomplished using engagement-level model alone. However, most previous works are prone to errors due to lack of behavioral information about the weapon systems. In order to overcome these limitations, this paper proposes an interoperation approach between the engagement- and engineering-level models. The proposed approach enables the engagement-level model to be supported by the engineering-level model representing the detailed behavior of weapon systems. Our methodology consider a limited combat situation including operational environments, dynamics and operational errors of weapons, and engagement orders. The paper describes a formalization of the system effectiveness analysis and defines an interface for interoperation between engagement- and engineering-level models. Then, we perform an anti-torpedo combat simulation as a case study.

약쑥(Artemisia princeps Pamp)의 항산화작용

홍정희,전정란,이주현,이인선,Hong, Jung-Hee,Jeon, Jeong-Lan,Lee, Ju-Hyun,Lee, In-Seon 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.6

본 연구는 약쑥(Artemisia princeps Pamp) 추출물의 항산화 효능을 조사하고자, 약쑥 분획물을 이용하여 총 폴리페놀 및 플라보노이드 함량, 활성산소종 소거능 및 간 microsome을 이용한 지질과산화 억제효과 등을 관찰하였다. 약쑥의 폴리페놀 함량 및 플라보노이드 함량은 EtOAc층에서 각각 $311.35{\mu}g/mg$ 및 $92.73{\mu}g/mg$으로 가장 높게 나타났다. DPPH radical 소거능은 EtOAc층의 $IC_{50}$이 $52.71{\mu}g/mg$으로 분획물 중에서 가장 높은 소거능을 보였다. Superoxideanion의 소거능은 EtOAc층의 $IC_{50}$은 $26.47{\mu}g/mg$으로, 합성항산화제인 BHA($IC_{50}:\;49.78{\mu}g/mg)$ 보다 항산화 효과가 우수한 것으로 나타났다. Hydrogen peroxide 소거능은 n-BuOH층의 $IC_{50}$이 $166.44{\mu}g/mg$으로, BHA의 소거활성보다 유의적(p<0.05)으로 높음을 알 수 있었다. Hydroxyl 라디칼 소거능도 EtOAc층의 $IC_{50}$값이 $58.92{\mu}g/mg$으로, BHA($IC_{50}:\;80.85{\mu}g/mg)$보다 유의적(p<0.05)으로 높았다. NO 소거능은 EtOAc층의 $IC_{50}$이 $65.94{\mu}g/mg$으로, BHA와 유의적인 차이가 없었다. 간 microsome에서의 지질과산화 억제효과도 EtOAc층이 분획물 중에서 가장 우수하였다. 이상의 결과로부터 약쑥 분획물의 EtOAc층이 총 폴리페놀 및 플라보노이드 함량이 높음을 알 수 있었으며, 이에 따른 활성산소종 소거능 및 간 microsome을 이용한 지질과산화 억제효과도 관찰할 수 있었다. Antioxidant properties of Artemisia princeps Pamp were determined using in vitro assay systems against 1,1-diphenyl-picrylhydrazyl (DPPH) radical, superoxide ($O_2{^-}$), hydrogen peroxide ($H_2O_2$), hydroxyl radical ($HO{\cdot}$) and nitric oxide (NO) radical, as well as rat liver microsomal lipid peroxidation. Among the five solvent fractions, ethyl acetate fractions showed the highest total polyphenol and flavonoid contents at $311.35{\mu}g/mg\;and\;92.73{\mu}g/mg$, respectively. Ethyl acetate fractions, except for $H_2O_2$ scavenging activity, also showed the highest scavenging activity; the 50% inhibitory concentration ($IC_{50},\;{\mu}g/mg$) values for DPPH, superoxide, $HO{\cdot}$ and NO radical scavenging were 52.71, 26.47, 58.92 and 65.94, respectively. Additionally, the highest inhibition of rat liver microsomal lipid peroxidation was observed by ethyl a cetate fraction.

Energy Efficiency & Sustainability - the Cleanliness Management Role of Components and System in Hydraulics and Lubricants

Jeong-hee. Hong(홍정희),Mike Day(마이크데이) 한국트라이볼로지학회 2016 한국트라이볼로지학회 학술대회 Vol.2016 No.4

This paper explains how eliminating contamination from the manufacturing processes will lead to better product quality and hence the need for reworking, a trouble free commissioning period and greatly improved production efficiency. All of these will reduce costs and energy usage. It will also ensure that the product is delivered to the customer in a condition that will ensure improved reliability and longer life, again reducing both energy and other operating costs. Correctly designing the contamination control measures will achieve and maintain the level of fluid cleanliness that is required by the end user. The filter is critical to cleanliness management and should be selected with the same degree of thought and consideration as for other major components. This paper explains the role that Cleanliness Management plays in the reducing the carbon footprint of systems and processes by making them perform more efficiently for longer periods. It also examines two differing ways of selecting filters to incorporate the features of newer designs, and shows how significant savings in the costs of ownership can be achieved using these approaches.

International Perspectives on Supportive Care for Cancer Survivors and Families : Cancer Patient Education in Practice 2

홍정희 ( Jeong Hee Hong ) 서울대학교 간호과학연구소 2003 서울대학교 간호과학연구소 학술대회 자료집 Vol.2003 No.-

New Androgen Receptor Axis-Targeted Agents in the Treatment of Nonmetastatic Castration-Resistant Prostate Cancer: From Bench to Clinical Trials

Jeong Hee Hong(홍정희) 대한비뇨기종양학회 2020 대한비뇨기종양학회지 Vol.18 No.2

Bone metastasis is a common sign of disease progression in nonmetastatic castration-resistant prostate cancer (nmCRPC). It has been known to be associated with significant morbidity and mortality. Delaying or preventing development of distant metastasis is the ideal goal of treatment. There had been no standard treatment options available for patients with nmCRPC before 2018. Recent approval of new androgen receptor axis-targeted agents in the management of nmCRPC has led to rapid evolution and is worthy of detailed investigation.

전립선암에서 전립선특이막항원을 이용한 특정표적 진단치료법의 최신 지견

홍정희(Jeong Hee Hong) 대한비뇨기종양학회 2022 대한비뇨기종양학회지 Vol.20 No.4