프로세스 알제브라를 이용한 AUTOSAR 소프트웨어 행위의 시간 특성 검증 기법

김진현(Jinhyun Kim),강인혜(Inhye Kang),김평수(Pyoung-Soo Kim),강성원(Sungwon Kang) 한국정보과학회 2011 정보과학회논문지 : 소프트웨어 및 응용 Vol.38 No.11

오늘날의 자동차 전장 시스템은 사용자의 기능에 대한 요구의 중가로 점점 복잡해지고 있다. 그리고 이러한 복잡도의 증가는 많은 기능이 소프트웨어로 구현되는 자동차 전장 시스템의 안전성애 심각한 영향 주고 있다. 시스템의 안전성을 향상시키기 위해 ISO 26262와 같은 국제 안전성 표준에 따른 개발과 AUTOSAR와 같은 공개 표준 플랫폼의 사용이 요구된다. ISO 26262는 고수준 안전성 등급을 위해 정형기법 사용을 권고한다. 본 논문에서는 AUTOSAR 소프트웨어 모델에 정형기법을 적용시키는 방법을 제시한다. 특히 소프트웨어 컴포넌트가 통합될 때 발생하는 시간적 오류 검출하기 위해 AUTOSAR의 시스템 시간 관점(System Timing View)에서 소프트웨어 행위를 정형적으로 영세하고 검증하는 기법을 제시한다. AUTOSAR로 개발된 소프트웨어 시스템의 시간적 행위 명세를 위해 정형명세 언어인 Algebra of Communicating and Shared Resources(ACSR)을 사용한다. ACSR은 소프트웨어의 실시간성 배타적 자원 사용 자원 가용성에 기반의 실행 등을 기술할 수 있는 실시간 시스템을 위한 프로세스 대수로서 ACSR로 명세 된 모델은 VERSA를 통해 자동 검증될 수 있다. 또한 자동차 정속주행장치의 사례 연구를 통해 적용 가능성을 보인다. Nowadays the complexity of automotive systems is increasing due to various and diverse functional requirements from the users. The growth of complexity can cause serious problems to the safety of automotive electronic systems because their functions are mainly implemented by software. The development in compliance with international standards for safety such as ISO 26262 and the use of open and standardized software platform such as AUTOSAR are demanded to improve the safety of automotive systems. ISO 26262 recommends use of formal methods for high-level safety-integrity systems. This paper proposes applying formal methods to AUTOSAR software models. In particular we provide formal specification and verification of software behaviors from AUTOSAR System Timing View to detect errors that are often happened when software components are integrated. In this paper we propose a formal verification method for timing analysis of AUTOSAR software models from the viewpoint of System Timing View of AUTOSAR timing extension. For the timing analysis we use ACSR(Algebra of Communicating and Shared Resources) a process algebra which can effectively specify important characteristics of real-time systems such as timing mutually and exclusively time-consuming use of resources execution based on resource availability. Models in ACSR can be automatically verified by VERSA a formal verification tool for ACSR. Furthermore we conduct a case study on car cruise control system to show feasibility of our approach.

Resveratrol reduces TNF-α-induced U373MG human glioma cell invasion through regulating NF-κB activation and uPA/uPAR expression.

Ryu, Jinhyun,Ku, Bo Mi,Lee, Yeon Kyung,Jeong, Joo Yeon,Kang, Seokmin,Choi, Jungil,Yang, Yeongae,Lee, Dong Hoon,Roh, Gu Seob,Kim, Hyun Joon,Cho, Gyeong Jae,Choi, Wan Sung,Kim, Nayoung,Kang, Sang Soo Potamitis Press 2011 Anticancer research Vol.31 No.12

<P>High invasiveness of glioma cells is one of the reasons that patients with malignant glioma have a poor prognosis. Resveratrol, a plant compound abundant in the peel of grapes, has been suggested as a potential cancer chemopreventive agent. Therefore, we investigated the effect of resveratrol on glioma cell invasion.</P>

Effects of Water Table Fluctuation on Carbon Dynamics in Northern Peatland

Jinhyun Kim(김진현),Line Rochefort,Chris Freeman,Hojeong Kang 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11

Northern peatlands are substantial carbon sinks because organic matter in peat is highly stable due to the low rate of decomposition. Waterlogged anaerobic conditions induce accumulation of Sphagnum-derived phenolic compounds that inhibit peat organic matter decomposition, a mechanism referred to as the “enzymic latch”. Recent studies have predicted that the water table in northern peatlands may become unstable. We observed that such unstable water table levels can impede the development of Sphagnum mosses. In this study, we determined the effects of low and high frequency water table fluctuation regimes on Sphagnum growth and peat organic matter decomposition, by conducting a year-long mesocosm experiment. In addition, we conducted a molecular analysis to examine changes in abundance of fungal community which may play a key role in the decomposition of organic matter in peatlands. We found that rapid water table fluctuation inhibited the growth of Sphagnum due to fungal infection but stimulated decomposition of organic matter that may dramatically destabilize peatland carbon storage. Increased pH, induced by the fluctuation, may contribute to the enhanced activity of hydrolases in peat. We demonstrated that the water table fluctuation in peatlands impeded Sphagnum growth and accelerates decomposition due to fungal proliferation. Thus, we suggested that understanding the microbial community in the northern peatlands is essential for elucidating the possible changes in carbon cycle of peatland under the changing world

An Analysis of Energy Consumption According to the Change of Circulation Pump Power

Jinhyun Lee(이진현),Subeen Kang(강수빈),Inae Suh(서인애),Younghum Cho(조영흠) 한국태양에너지학회 2017 한국태양에너지학회 학술대회논문집 Vol.2017 No.4

Timed and Resource-Oriented Statecharts for Embedded Software

Jinhyun Kim,Inhye Kang,Jin-Young Choi,Insup Lee IEEE 2010 IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS - Vol.6 No.4

<P>Embedded software should be correctly developed so that it is be compliant with not only functional requirements but also real-time and resource constraints. However, those constraints are often dependent on execution environments that are sometimes revealed in late development phases. In this paper, we propose Timed and Resource-oriented Statecharts (TRoS) to analyze the time and resource-constrained behavior of system in earlier development phases of embedded software development. TRoS extends Statecharts using timed action labeled with resources to represent actions that consume resources. This enables us to describe the competition among processes to use shared resources, and to analyze schedulability of embedded systems. We present a case study of a distance control module that controls train movement to keep the distance between trains for railway control systems.</P>

Differences in Biogeochemical Properties and Microbial Activities in Stream Segments with Changes in Land-use Type

Jinhyun Kim,Inyoung Jang,Hyunjin Lee,Hojeong Kang 응용생태공학회 2015 Ecology and resilient infrastructure Vol.2 No.3

Changes in land-use type can affect soil and water properties in stream ecosystems. This study examined the effects of different land-use types on biogeochemical properties and microbial activities of a stream. We collected water and sediment samples in a stream at three different sites surrounded by varying land-use types; a forest, a radish field and a rice paddy. Nitrogen contents, such as nitrate, nitrite and total nitrogen in the stream water body, showed significant differences among the sampling sites. The highest nitrogen values were recorded at the site surrounded by cropland, as fertilizer runoff impacted the stream. Soil organic matter content in the sediment showed significant differences among sites, with the highest content exhibited at the forest mouth site. These differences might be due to the organic matter in surrounding terrestrial ecosystems. Microbial activities determined by extracellular enzyme activities showed similar values throughout all sites in the water body; however, the activities in the sediments exhibited the highest values near the forest site and mirrored the soil organic matter content values. From these results, we conclude that different land-use types are important factors affecting water and sediment properties in stream ecosystems.

Comparative study of effect of different vegetation on methane emission and related microbial community from tidal marsh soil in East Aisa and North America

Jinhyun Kim,Roos Plak,Sihoon Lee,Hojeong Kang 대한환경공학회 2015 대한환경공학회 학술발표논문집 Vol.2015 No.10

Co-authorship patterns and networks of Korean radiation oncologists

Jinhyun Choi,Jin Oh Kang,Seo Hyun Park,Sang Ki Kim 대한방사선종양학회 2011 Radiation Oncology Journal Vol.29 No.3

Purpose: This research aimed to analyze the patterns of co-authorship network among the Korean radiation oncologists and to identify attributing factors for the formation of networks. Materials and Methods: A total of 1,447 articles including contents of ‘Radiation Oncology’ and ‘Therapeutic Radiology’ were searched from the KoreaMed database. The co-authorship was assorted by the author’s full name, affiliation and specialties. UCINET 6.0 was used to figure out the author’s network centrality and the cluster analysis, and KeyPlayer 1.44 program was used to get a result of key player index. Sociogram was analyzed with the Netdraw 2.090. The statistical comparison was performed by a t-test and ANOVA using SPSS 16.0 with p-value < 0.05 as the signifi cant value. Results: The number of articles written by a radiation oncologist as the first author was 1,025 out of 1,447. The pattern of coauthorship was classified into five groups. For articles of which the first author was a radiation oncologist, the number of singleauthor articles (type-A) was 81; single-institution articles (type-B) was 687; and multiple-author articles (type-C) was 257. For the articles which radiation oncologists participated in as a co-author, the number of single-institution articles (type-D) was 280 while multiple-institution articles (type-E) were 142. There were 8,895 authors from 1,366 co-authored articles, thus the average number of authors per article was 6.51. It was 5.73 for type-B, 6.44 for type-C, 7.90 for type-D, and 7.67 for type-E (p = 0.000) in the average number of authors per article. The number of authors for articles from the hospitals published more than 100 articles was 7.23 while form others was 5.94 (p = 0.005). Its number was 5.94 and 7.16 for the articles published before and after 2001 (p = 0.000). The articles written by a radiation oncologist as the first author had 5.92 authors while others for 7.82 (p = 0.025). Its number was 5.57 and 7.71 for the Journal of the Korean Society for Therapeutic Radiology and Oncology and others (p = 0.000), respectively. Among the analysis, a signifi cant difference in the average number of author per article was indicated. The out-degree centrality of network among authors was 4.26% (2.03–.09%) while in-degree centrality was 1.31% (0.53–.84%). The three signifi cant nodes were classified and listed as following: Choi, Eun Kyung for 1991-1995, Kim, Dae Young for 1998-2001, Park, Won and Lee, Sang Wook for 2003-2010. Choi, Eun Kyung and Kim, Dae Young appeared in two cases, and ranked as the highest degree in centrality. In the key player analysis, Choi, Eun Kyung and Lee, Sang Wook appeared in two cases, and ranked as the highest. From the cluster analysis, Sungkyunkwan University, Seoul National University and Yonsei University revealed as the three large clusters when Ulsan University, Chonnam National University, and Korea Institute of Radiological & Medical Science as the medium clusters. Conclusion: The Korean radiation oncologist’s society shows a closed network with numerous relationships among the particular clusters, and the result indicates it is different from other institutions in the pattern of co-authorship formation of the major hospitals.

Basics of particle therapy 2: relative biological effectiveness

Jinhyun Choi,Jin Oh Kang 대한방사선종양학회 2012 Radiation Oncology Journal Vol.30 No.1

In the previous review, the physical aspect of heavy particles, with a focus on the carbon beam was introduced. Particle beam therapy has many potential advantages for cancer treatment without increasing severe side effects in normal tissue, these kinds of radiation have different biologic characteristics and have advantages over using conventional photon beam radiation during treatment. The relative biological effectiveness (RBE) is used for many biological, clinical endpoints among different radiation types and is the only convenient way to transfer the clinical experience in radiotherapy with photons to another type of radiation therapy. However, the RBE varies dependent on the energy of the beam, the fractionation, cell types, oxygenation status, and the biological endpoint studied. Thus this review describes the concerns about RBE related to particle beam to increase interests of the Korean radiation oncologists' society.

Accurate Modeling and Robust Hovering Control for a Quad-rotor VTOL Aircraft

Kim, Jinhyun,Kang, Min-Sung,Park, Sangdeok Springer-Verlag 2010 Journal of Intelligent & Robotic Systems Vol. No.