명령어 집합 시뮬레이터를 이용한 임베디드 소프트웨어 디버거

정훈,손성훈,신동하,Jung, Hun,Son, Sung-Hoon,Shin, Dong-Ha 한국시뮬레이션학회 2006 한국시뮬레이션학회 논문지 Vol.15 No.4

임베디드 소프트웨어의 디버깅은 일반 소프트웨어의 디버깅과는 많이 다르다. 예를 들어 임베디드 소프트웨어 디버깅에는 일반 소프트웨어의 디버깅에는 필요하지 않는 전력 소비량에 대한 정보, 실행된 명령어 분포에 대한 정보, 사용된 레지스터 분포에 대한 정보, 프로그램 수행 시 소요된 클럭 수에 대한 정보 등이 추가적으로 더 필요하다. 본 논문은 임베디드 소프트웨어가 수행되는 마이크로프로세서의 명령어 집합 시뮬레이터를 이용하여 임베디드 소프트웨어를 효과적으로 디버깅하는 새로운 방법을 제안한다. 본 연구에서는 국산 임베디드 마이크로프로세서인 SE1608의 명령어 집합 시뮬레이터를 기반으로 디버거를 개발하고 이를 사용하여 임베디드 소프트웨어 벤치마크 프로그램으로 많이 이용되는 MiBench 프로그램을 사용하여 임베디드 소프트웨어를 효과적으로 디버깅하는 보기를 제시한다. 본 연구에서 제시한 디버깅 방법은 기존의 디버깅 방법에 비하여 비교적 구현하기도 쉬우면서 많은 장점이 있는 것으로 판단된다. Debugging embedded softwares is very different from debugging general softwares. For examples, debugging embedded software requires more information, such as information on power consumption, information on the distribution of executed instructions, information on the distribution of used registers, and information on the amount of clocks consumed during the execution of a program, that is not needed in debugging general softwares. In this paper, we propose more effective method fer debugging embedded softwares using an instruction set simulator for the microprocessor that is executing embedded softwares. In this research, we develop a debugger based on an instruction set simulator for a domestic embedded microprocessor called SE1608 and we shows an effective debugging method using a MiBench program which is widely used to benchmark embedded softwares. The debugging method proposed in this paper is relatively easy to implement and shows many advantages compared with existing debugging methods.

Analytical Structural Integrity for Welding Part at Piping Penetration under Seismic Loads

Hun-Oh Choi(최헌오),Hoon-Hyung Jung(정훈형),Chae-sil Kim(김재실) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.1

The purpose of this paper is to assess the structural integrity of piping penetrations for nuclear power plants. A piping qualification analysis describes loads due to deadweight, pressure difference acts normal to the plate, thermal transients, and earthquakes, among other events, on piping penetrations that have been modeled as an anchor. Amodel was analyzed using a commercial finite element program. Apiping penetration analysis model was constructed with an assembly of pipe, head fittings and sleeves. Normally, the design load, thus obtained, will consist of three moments and three forces, referred to a Cartesian coordinate system. When comparing the stress analysis results from each required cutting position, the general membrane stress intensities and local membrane plus bending stress intensities during a structural evaluation cannot exceedthe allowable amount of stress for the design loads. Therefore, the piping penetration design satisfies the code requirements.

말더듬인의 후두 행동 및 음향학적 특성 연구

정훈(Hun Jung) 한국언어치료학회 2014 言語治療硏究 Vol.23 No.2

Purpose: The abnormal laryngeal behaviors observed in the utterances of people who stutter (PWS) are believed to be directly associated with stuttering. The objectives of this study were to find laryngeal behaviors of PWS, acoustic characteristics of PWS, and provide the basic information necessary to develop a stuttering treatment method. Methods: To investigate the laryngeal behaviors of PWS and acoustic characteristics, we sampled 25 PWS, 26 people with muscle tension dysphonia (PMTD), which is a representative communication disorder causing speech production through excessive tension in the larynx, and 28 people who do not stutter (NS), and compared the groups. Laryngeal behavior characteristics were compared among the groups in terms of supraglottis movement and vocal fold vibration, and acoustic characteristics were compared in terms of fundamental frequency (F0), jitter, shimmer, and noise to harmonic ratio (NHR). Results: First, in the comparison of supraglottis movement among groups, significant difference was observed in false vocal compression. Second, in the comparison of vocal fold vibration among the groups, significant difference was observed in the glottical attack before phonation, the regularity of vocal cords, vocal fold contact quotient, and vocal fold vibratory start time. Third, in the comparison of acoustic characteristics among the groups, significant difference was observed in jitter, shimmer, and NHR. Among acoustic characteristics related to PSW however, only shimmer was significantly different. Conclusions: In conclusion, major laryngeal behaviors of PWS and acoustic characteristics include false vocal compression resulting from excessive tension on the supraglottical level, and excessive tension in glottical attack before utterance, vocal fold contact quotient, and vocal fold vibratory start time on the glottical level. Such glottical level tension may be explained with irregular vocal tension related to acoustic intensity and delayed vocal fold vibratory start time.

촉매대 길이변화가 단일액체추진제 추력기의 성능에 미치는 영향

정훈(Hun Jung),김종현(Jong Hyun Kim),이상신(Sang Shin Lee),최현아(Hyun Ah Choi),김정수(Jeong Soo Kim) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.5

우주비행체의 궤도 및 자세제어 시스템으로 활용 가능한 하이드라진 추력기의 촉매대 최적설계변수 도출을 위한 지상연소시험을 수행하였다. 추력, 추진제 질량유량, 챔버 압력 및 온도 등의 성능특성을 추력실 길이변화에 따라 관찰하고, 상기의 원시변수들을 기초로 도출한 비추력, 응답특성, 그리고 하이드라진 분해반응 결과를 통해 개발모델들 간의 성능을 비교하였다. 성능평가결과, 시험조건 내에서의 촉매대 길이증가는 추력기의 성능저하를 야기하는 것이 확인되었다. A ground hot-firing test was conducted to take out the optimal design configurations for the catalyst bed of hydrazine thruster which can be used in the orbit and attitude control system (ACS) of space vehicles. Performance characteristics with the variation of thrust-chamber length are observed in terms of thrust, propellant mass flow rate, chamber pressure and temperature. The performance comparison was additionally made through the specific impulse, response characteristics, and result of hydrazine decomposition rate derived from the primitive performance parameters. It is confirmed that increase of catalyst-bed length leads to performance degradation in this test condition.

우주비행체의 궤도 및 정밀자세제어를 위한 소형 액체로켓엔진의 펄스모드 성능시험

정훈(Hun Jung),김종현(Jong Hyun Kim),서항석(Hang Seok Seo),김정수(Jeong Soo Kim),이재원(Jae Won Lee) 한국추진공학회 2012 한국추진공학회 학술대회논문집 Vol.2012 No.11

우주비행체의 자세제어 시스템으로 적용 가능한 중형급 하이드라진 추력기가 설계/제작되었으며, 개발모델 추력기의 성능검증을 위해 수행된 지상연소시험 결과를 추력, 온도, 그리고 압력 등을 통하여 제시한다. 엔진의 추력 재현성이 매우 우수할 뿐만 아니라, 이론설계치 대비 98% 이상의 지상추력 발생능력을 확보한 것이 시험을 통하여 검증되었다. A hydrazine thruster of medium-level thrust to be used in the attitude control system (ACS) of space vehicles has been developed, and its ground firing test result is presented in terms of thrust, temperature, and chamber pressure. It is experimentally verified that the repeatability of thrust is very excellent, and thrust level is ensured above 98% compared with its ideal requirement specification.

소형 액체로켓엔진 인젝터의 분무 분열특성에 대한 연료분사압력의 영향

정훈(Hun Jung),김정수(Jeong Soo Kim),김성초(Sungcho Kim),박정(Jeong Park) 한국추진공학회 2007 한국추진공학회지 Vol.11 No.3

후두 내시경(Fiber-Optic Nasolaryngoscope)을 이용한 말더듬인의 후두양상에 관한 연구

정훈(Hun Jung),안종복(Jong-Bok Ahn),최병흔(Byung-Heun Choi),권도하(Do-Ha Kwon) 한국음성학회 2008 음성과학 Vol.15 No.3

The purpose of this study was to use fiber-optic nasolaryngoscope to find outdifferences in laryngeal behavior between persons who stutter(PS) and those who do not stutter(NS) upon their utterance. To meet the goal above, this study took 5 NS and 5 PS respectively as a part of sampling, so that they were all asked to join an experiment hereof. As a result, this study came to the following findings: First, there was not any significant difference in laryngeal behavior of uttering spoken languages between stuttering group and control. Second, there were some differences in laryngeal behavior of repetition and prolongation, which were a sort of disfluency revealed in the utterance of nonfluent spoken languages between stuttering group and control. Third, as reported by prior studies, it was found that there were differences in laryngeal abehavior of stutterer group's nonfluent spoken languages depending upon stuttering types. In this study, a variety of laryngeal behavior unreported in prior studies could be found. In addition, it was notable that stutterers showed different laryngeal behavior depending on their personal stuttering types. On block condition, Subject 1 showed laryngeal behavior of fAB, INT and fAD; Subject 2 showed laryngeal behavior of fAB, fAD and rAD; Subject 3 showed laryngeal behavior of fAD and rAD; Subject 4 showed only laryngeal behavior of fAD; and Subejct 5 showed laryngeal behavior of fAB, fAD and rAD. Summing up, these findings imply that when stutterers utter nonfluent words, they may reveal a variety of laryngeal behavior depending on their personal stuttering types. Moreover, it is found that there are more or less differences in the utterance of nonfluent spoken languages between NS and stuttering ones. In particular, it is interesting that one common trait of nonfluent spoken languages uttered by PS is evidently excessive laryngeal stress, no matter which type of stuttering they reveal.

추력실 길이에 따른 하이드라진 추력기의 저주파 연소불안정 특성

정훈(Hun Jung),김종현(Jong Hyun Kim),박재문(Jae Moon Park),배성훈(Seong Hun Bae),김정수(Jeong Soo Kim) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12

70 N급 하이드라진 추력기 개발모델의 압력 불안정 특성 고찰을 위한 시험평가가 수행되었다. 개발모델의 추력실 형상이 연소 안정성에 미치는 영향을 규명하기 위해, 하단 촉매대의 길이 변화에 따른 지상연소시험이 수행되었다. 성능평가 결과, 시험모델에서 저주파 압력 불안정 특성이 관찰되었으며 불안정성은 추력실 압력과 추진제 공급특성이 연계되어 발현되는 추진제 분무의 동적특성에 지배적인 영향을 받는 사실이 확인되었다. A test and evaluation was carried out to make a close examination into the combustion instability for the 70 N-class hydrazine thruster under development. In order to investigate the effects of thrust chamber configuration on combustion stability, ground hot-firing tests for the development models were performed with variation of lower catalyst-bed length. As a result, it was identified that low-frequency pressure instability appears in the test models. This instability was primarily affected by the dynamic nature of propellant spray which is consequence of coupling between thrust chamber pressure and propellant supply characteristic.

소형 액체로켓엔진 인젝터 분무의 연료분사압력 변이에 따른 액적의 공간분포 특성

정훈(Hun Jung),김정수(Jeong Soo Kim) 한국추진공학회 2008 한국추진공학회지 Vol.12 No.5

대학 유도수업의 교육품질과 수강생의 행복 및 운동지속의사의 관계

정훈 ( Hun Jung ) 대한무도학회 2022 대한무도학회지 Vol.24 No.1

본 연구는 유도수업의 교육품질과 수강생의 행복 및 운동지속의사의 관계를 실증적으로 구명하는 데 목적이 있었다. 이를 위하여 2019년 경기, 대전, 충남에 위치한 대학에서 유도수업을 수강생을 모집단으로 편의표집방법을 이용하여 총 214명의 표본을 수집하였다. 최종분석에는 총 205명의 자료가 사용되었으며, 연구목적에 따라 빈도분석, 탐색적 요인분석, 신뢰도 분석, 상관관계분석, 표준중다회귀분석을 실시하였다. 그 결과 첫째, 교육품질의 교육내용, 교수자질, 시설만족은 행복의 삶의 만족에, 또 교육품질의 교육내용과 시설만족은 행복의 긍정적 정서에 유의한 영향을 미치는 것으로 나타났다. 둘째, 교육품질의 교육내용, 교수자질, 시설만족은 운동지속의사에 유의한 영향을 미치는 것으로 나타났다. 셋째, 행복의 삶의 만족은 운동지속의사에 유의한 영향을 미치는 것으로 나타났다. The purpose of this study is to empirically analyse relationship among judo education quality, happiness and exercise adherence of university students. For this reason, we conducted a survey of 214 university students who took Judo class, collected by the convenience sampling method. Using 205 collected data by SPSS 22, this study was conducted by frequency analysis, exploratory factor analysis, reliability analysis and standard multiple regression analysis. The results are as following. First, educational contents, Teaching qualifications and facility satisfaction of education quality had positive influence on life satisfaction of happiness, educational contents and facility satisfaction of education quality had positive influence on positive emotion of happiness. Second, educational contents, Teaching qualifications and facility satisfaction of education quality had positive influence on exercise adherence. Third, life satisfaction of happiness positively affected on exercise adherence.