C++ 컴파일러에서 중간코드의 검증과 분석을 위한 역컴파일러의 설계 및 구현

배성균 ( Sung-kyun Bae ),김영근 ( Young-keun Kim ),이양선 ( Yang-sun Lee ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.1

C++ 언어는 객체지향 프로그래밍 언어로, 기존의 C++ 프로그램은 각각의 플랫폼에 따른 컴파일러를 통해 목적기계의 코드(object code)로 변환되므로 실행되는 플랫폼에 의존적인 단점이 있다. 이러한 단점을 보완하는 방법으로 스택기반의 가상기계와 가상기계의 입력형태인 중간코드를 이용하는 기법이 있다. EVM(Embedded Virtual Machine)은 ANSI C, ISO/IEC C++ 언어와 SUN사의 Java 언어 등을 모두 수용할 수 있는 임베디드 시스템 기반의 가상기계이며, EVM에서 실행되는 중간코드인 SIL(Standard Intermediate Language)은 객체지향 언어와 순차적인 언어를 모두 수용하기 위한 명령코드의 집합으로 설계되어 있다. 본 논문에서는 C++ 컴파일러를 통해 생성된 SIL 코드가 올바른지 검증하고 원시코드의 분석을 용이하게 하기 위해서 SIL 코드를 어셈블리 코드와 유사한 형태의 재 표현된 C++ 프로그램으로 역컴파일하는 시스템을 설계하고 구현하였다.

객체지향 C++ 컴파일러에서 가상기계 코드의 실행과 분석을 위한 역컴파일러의 설계 및 구현

배성균(Sung-Kyun Bae),김영근(Young-Keun Kim),권혁주(Hyeok-Ju Kwon),이양선(Yang-Sun Lee) 한국멀티미디어학회 2006 한국멀티미디어학회 학술발표논문집 Vol.2006 No.1

EVM(Embedded Virtual Machine) 은 ISO/IEC C++ 와 SUN사의 Java 등의 객체지향 언어를 수용할 수 있는 임베디드 가상기계 솔루션이며, SIL(Standard Intermediate Language)은 EVM의 종간언어로 객체치향 언어와 순차적인 언어를 위한 연산 코드 집합을 갖고 있다. 기존의 객체지향 C++ 컴파일러는 C++ 프로그램을 목적기계의 코드로 변환하여 실행한다. 이러한 문제를 해결하기 위해 본 연구팀은 EVM을 개발하면서 목적기계의 코드가 아닌 플랫폼에 독립적인 스택기반의 가상기계 코드를 생성하는 C++ 컴파일러를 개발하였다. 본 논문에서는 C++ 컴파일러가 생성한 중간 언어인 SIL 코브를 3-주소 코브 형태의 재 표현된 C++ 프로그램으로 변환하는 역컴파일러(Decompiler) 시스템을 설계하고 구현하였다. 역컴파일러가 생성한 C++ 프로그램의 실행을 통해 SIL 코드가 올바르게 생성되었는지를 확인할 수 있으며, 최적화된 SIL 코드의 생성을 위한 시뮬레이션을 제공한다. 또한 프로그램에 담겨진 의미를 어셈블리 형태를 지닌 SIL 코브에 비해 소스 레벨로 쉽게 분석할 수 있다는 장점이 있다.

2003년 국내 중증급성호흡기증후군 진료 현황 및 문제점 분석

이진수,김은실,정문현,백제중,정선화,안주희,최영화,이선희,고철우,김성범,김민자,박승철,기현균,송재훈,최상호,김양수,이상오,조용균,박영훈,정숙인,김연숙,이흥범,손창희,장성희,정희진,김우주 대한감염학회 2004 감염과 화학요법 Vol.36 No.3

목적 : 2002년 말 중국에서 SARS가 발생한 이후 국내에서도 2003년 10월까지 총 3명의 추정환자, 17명의 의심환자가 보고되었다. 향후 추가적인 SARS의 유행이 우려되는 상황에서, 그간의 SARS 환자 진료에 있어서의 실질적인 준비사항, 진료 현황 등에 대한 조사를 통해 문제점을 파악하여, 향후 더 나은 대비가 될 수 있도록 개선점을 제시하고자 하였다. 재료 및 방법 : SARS로 의심되는 환자를 진료 경험이 있는 병원의료진을 대상으로 2003년 10월에 설문조사를 실시하였다. 설문에는 SARS 환자 진료 시의 실질적인 조치, 진료 현황, 병실, 응급실 및 외래에서의 격리 시설과 준비사항, 보건당국의 관리와 지원에 관한 사항을 포함하였다. 결과 : 대상이 되는 22개 병원 중 17개(17/22, 77.2%) 병원이 설문에 응하였다. SARS 환자를 위한 격리실은 응급실, 외래, 일반병실 및 중환자실에서 각각 9개(9/17, 52.9%), 5개(5/17, 29.4%), 15개(15/16, 93.7%), 4개(4/16, 25%) 병원에서 음압처리가 되어있지 않은 일인실 혹은 다인실이 사용되었고, 1개(1/16, 6.3%) 병원에서만 일반병실에서 음압격리실이 운영되었다. 입원환자의 진찰 시 개인보호구의 착용은 거의 모든 의료기관에서 이루어졌다. 보건당국에서 SARS지정병원의 시설 등을 사전에 확인한 곳은 1곳(1/12, 8.3%)이였고, 14개 병원(14/15, 93.3%)에서는 보건당국에 의뢰한 검사결과를 통하 받지 못하였다. 결론 : 의료기관에서 SARS 환자용 격리실뿐만 아니라 기존의 격리실 설비 등이 미흡하였으며, 특히 중환자실 및 외래의 준비가 더욱 부족하였다. 보건당국의 의료기관에 대한 종합적인 지원이 부족하였고, 병원과의 원활한 연계가 잘 이루어지지 않았다. SARS 만이 아닌 격리를 필요로 하는 질환의 적절한 진료를 위해 향후 병원 시설의 정비와 정부차원에서의 보다 구체적이고 실질적인 대책마련이 필요하다. Background : There was an worldwide outbreak of the Severe Acute Respiratory Syndrome (SARS) originated from China in late 2002. During that period three cases of suspected SARS and 17 cases of probable SARS were reported in Korea. With the concerns about the reemergence of SARS-coV transmission, it is important to be prepared for any possibility. So, this study is aimed to analysis the past measures in managing SARS and propose the amendatory plans to improve the preparedness. Materials & Methods : Questionnaires were collected among clinicians with any experience in managing the probable or suspected SARS cases in Oct. 2003. 17 out of 22 hospitals responded to the questionnaire. The contents in the questionnaire were practical activities, personal equipments, response plans, isolation facilities in emergency centers, outpatient clinics, general wards and intensive care units, and relationship with the public health department. Results : The dedicated isolation rooms in emergency centers, outpatient clinics, general wards, and intensive care units were prepared in 9 (9/17, 52.9%), 5 (5/17, 29.4%), 15 (15/16, 93.7%), and 4 (4/16, 25.0%) hospitals, respectively. Except for one hospital that newly made negative pressure room for SARS, single or multi-bed rooms without airborne infection control were used in all the other hospitals. The personal precaution principles were kept quite well in general wards. Before the designation of SARS hospital by the public health department prior evalution to see if the hospital was suitable for managing SARS was conducted in only 1 (1/12, 8.3%) hospital. The results of laboratory diagnosis were reported back in 1 (1/15, 6.6%) hospital. Conclusions : The isolation facilities which can control airborne infection were almost deficient not only for SARS but also for other respiratory transmissible diseases. For the infection control of transmissible diseases including SARS, more investment is needed on medical facilities and comprehensive support from the public health department required.

도서지역 이동통신의 통화품질 분석

노순국,박창균 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1

March in 2000, the subscriber number of mobile phone are 26,100,000, but communication service does not enough as traffic quality Especially, island areas are insufficient mobile phone service and the study about propagation environment is in progress to solve the problem. In this study, by comparing and analyzing that traffic quality of mobile phone in the domestic main residental areas and island areas, propose relative necessity of mobile communication service at island areas

발치후 임프란트 매식 시기에 따른 골유착에 관한 연구 : Histomorphometric and Biomechanical Studies 조직형태계측학적 및 생역학적 연구

오희균,류선열 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.4

The purpose of this study was to investigate the effect of timing of implant insertion on osseointegration after tooth extraction. Fifteen mongrel dogs, weighing 15kg or more, were used. The lower right 1st, 2nd, 3rd, 4th premolars and 1st molar were extracted under general anesthesia. Implants were inserted at 2, 4, and 8 weeks after extraction of the teeth, being designated as 2-, 4-, and 8-week groups, respectively. Results obtained were as follows. 1. Macroscopically there was neither an infection at the implant site nor an exposure of the implant. 2. Histologically the surrounding bone of the implant was less mature in the 2-week group than in the 4- and 8-week groups. 3. The implant-bone contact ranged from 75 to 82%, with no significant differences among the groups. No increase in the implant-bone contact was found with increasing healing periods from 4 to 12 weeks after implant insertions. 4. The average depth (0.64mm) of the fibrous connective tissue ingrowth in the 2-week group was slightly deeper than those in the 4- (0.51mm) and 8-week (0.53mm) groups at 12 weeks after implant insertion. 5. the implant-bone interfacial bond strengths were 73.05kgf in the 2-week group, 69.71 kgf in the 4-week group and 73.76 kgf in the 8-week group. No significant difference was noted in pullout force among the groups. The degree of confidence of interfacial bone strength was highest in the 8-week group, followed by the 4- and 2-week groups. These results indicate that at least 4 weeks of healing period will be required before implant is to be inserted following tooth extraction.

기계적 합금화에 의한 Al-Fe 및 Al-Fe-Ce 합금의 고온 변형거동

김선진,이도인,안인섭,허보영,조권구 국립경상대학교 공과대학 부설 첨단소재연구소 1992 尖端素材 Vol.2 No.-

The deformation behavior of a mechanical alloyed Al-Fe and Al-Fe-Ce alloy was studied in the temperature range of 300℃ to 500℃. The steady state for Al-8wt.%Fe powder was obtained after 1000 minutes of mechanical alloying at the process condition of 2wt.% stearic acid, 46:1 of grinding media/powder weight ratio, and 300 rpm of impeller revolving velocity. The relative densities of Al-8wt.%Fe alloy powders reached almost 100% after 1 hour sintering at 470℃ under vacuum state. With increasing the amount of PCA, hardness of the sintered alloys increased but the relative densities were not affected. It was also found that decrease in hardness and tensile strength after high temperature aging treatment was reduced with increasing the amount of Ce addition.

입원중인 환자들의 권리인식과 만족도

김선민,이태용,오장균,박암 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.1

The author studied the recognition of patient's right and the degree of one's satisfaction to help set the index of doctor-patient relationship. The data was collected from 423 patients who were admitted to the hospital in Taejeon for fifteen days from Aug. 10, 1991 to Aug. 25, 1991. The results were as the follows: 1. The recognition of the patient's right and the degree of satisfaction were 4.46±0.734, 3.20±0.884 of total 5.0 score in each mean level. 2. "I believe a patient has a right to be treated equal.", "I believe a patient has a right to be compensated in medical accident." and "A patient should be told his diagnosis, treatment, prognosis about the disease by the doctor." were high mean level among each question. Their mean levels were 4.73, 4.69, 4.66 in sequence. 3. The recognition of patient's right by the age was the highest in teenager. It was lowest in above fifty years old. It was lower as age increase. There were statistically significant difference(P<0.05). The recognition of patient's right by the level of education was highest in college level and lowest in primary school level, but the degree of satisfaction was highest in primary school level and lowest in high school. The higher the education level was, the higher the recognition of patient's right was, but the lower it was, the higher the degree of satisfaction was. There was statistically significant difference(P<0.01). The recognition of patient's right be family income was highest in high income level but the degree of satisfaction was lowest. There was statistically significant difference in the recognition of patient's right(P<0.01). 4. Correlation between the recognition of patient's right and the degree of its satisfaction: "To be advised if the hospital proposes to engage in human experimentation affecting his care to patient one has the right to refuse to participate in such research projects was positive correlation with the degree of its satisfaction(r=0.1153). There was statistically significant difference(P<0.01). There were no correlation in other questions. 5. Correlation among each questions for the recognition of patient's right was highest between "…to expect that all communications and records pertaining to his care should be treated as confidential" and "…the right to know what hospital rules and regulations apply to his conduct as a patient"(r=.6314). 6. Correlation among each questions for the degree of satisfaction was highest between "…to considerate and respectful care" and "…to expect that within its capacity a hospital must make reasonable response to the request of a patient for services"(r=.6314).

일부 부인과 양성 질환자의 지방조직 및 혈청의 PCBs와 DDE 농도

박성균,이강숙,노영만,구정완,민선영,한진구,고원경,김미란,정재근,이종승,김진홍 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목적 : 본 연구는 지방조직과 혈청의 PCBs와 DDE 농도를 측정하고, 이에 영향을 미치는 것으로 알려진 요인들과의 관련성을 평가하고자 하였다. 방법 : 유방암, 자궁내막증 등 유기염소계 화합물의 영향이 있는 것으로 알려진 호르몬 관련 질병을 제외한 부인과 환자 52명을 대상으로 지방조직과 혈청을 분석하였으며, 설문조사를 통하여 연령, 교육수준, 직업, 비만도, 흡연과 음주, 출산력, 수유력등을 조사하였다. 지방조직과 혈청의 PCBs와 DDE 농도는 가스크로마토그래피를 사용하여 측정하였다. 결과 : 지방조직의 경우, 13개 PCBs congeners 농도의 합은 중앙값이 48.29 ng/g, 기하평균값이 56.78 ng/g이었고, DDE 농도는 중앙값이 142.89ng/g, 기하평균값이 117.06 ng/g이었으며, 혈청의 경우는 PCBs congeners 농도의 합은 중앙값이 4.67 ㎍/L, 기하평균값이 4.85 ㎍/L이었고, DDE 농도는 중앙값이 1.75 ㎍/L, 기하평균값이 2.09 ㎍/L로 나타났다. 지방조직과 혈청의 DDE 농도 사이는 높은 상관성을 보였으나(r²=0.310, p=0,0002), PCBs는 상관성이 약한 것으로 나타났다(r²=0.029, p=0.2582). 영향요인을 범주화한 후 로그변환 시킨 지방조직과 혈청의 PCBs, DDE 평균의 차이를 분석한 결과, 지방조직의 DDE만이 출산자녀수(p=0.015), 초산연령 (p=0.014), 비만지수(p=0.035)와 연관성이 발견되었다 다중회귀분석의 결과 지방조직의 DDE는 출산자녀수가 적을수록, 초산연령이 늦을수록 증가하는 경향을 보였다. 결론 : 출산자녀수와 초산연령, 비만도가 지방조직의 DDE와 관련성을 보였으며, 또한 유기염소계 화합물의 장기간의 노출에 의한 영향을 평가하는데 있어서 혈청보다 지방조직이 더 유용한 생물지표임을 알 수 있었다. Objectives : This study was purposed to determine the levels of PCBs and DDE in adipose tissue and serum and to evaluate the relations with factors affecting these levels. Methods : We analyzed adipose tissues and sera from 52 gynecologic benign disease patients aged 27-78 years, except hormonal diseases such as breast cancer and endometriosis. We also surveyed age, education, occupation, body mass index (BMI), smoking, drinking, number of children, and duration of breastfeeding by questionnaires. Tissue and serum levels of PCBs and DDE were measured using gas chromatography. Results : The median and geometric mean levels of PCBs were 48.29 ng/g, 56.78 ng/g for adipose tissue and 4.67 ㎍/L, 4.85 ㎍/L for serum, and those of DDE were 142.89 ng/g, 117.06 ng/g for adipose tissue and 1.75 ㎍/L, 2.09 ㎍/L for serum, respectively. Adipose tissue and serum levels for DDE showed high correlation (r²=0.310, p=0.0002), but those of PCBs didn't (r²=0.029, p=0.2582). In analyses of the differences of the means of log transformed adipose tissue and serum PCBs and DDE levels for groups of potential covariates, only adipose tissue DDE levels were significantly associated with number of children (p=0.015), age at first birth (p=0.074) and BMI (p=0.035). In multiple regression analysis, adipose tissue DDE levels were significantly increased with decreasing number of children and increasing age at first birth. Conclusions : This study suggested that parity and adiposity were associated with levels of DDE in adipose tissue, and adipose tissue is a better biomarker than serum for evaluating the long-term exposure of organochlorines.

지삭의 양단이 단순고정된 화물삭도의 선로해석

신재균,최선호 영남대학교 공업기술연구소 1989 연구보고 Vol.17 No.1

A method of analyzing load-carrying ropeways is suggested in this study. Compared to to the ropeways for passengers whose tension at the one end of the main rope is given, load-carrying ropeways require different treatment because their main ropes are fixed at both ends. This difference makes the problem of analyzing load-carrying ropeways a statically indeterminate one and some iteraive solution technique seems to be inevitable. But, it is shown that this statically indeterminate problem can conceptually be reduced to a problem of solving a nonlinear algebraic equation in this study, and some numerical method such as Newton-Ropshon method can be applied successfully to solve the problem. Also, some example ropeways are analyzed after the proposed solution technique and the results are discussed.

생약재 혼합급여가 웅추의 정액성장과 장기발육에 미치는 영향

오선균, 조성구 忠北大學校 1986 論文集 Vol.32 No.-

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