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공유 메모리 병렬 프로그램의 수행중 오류 탐지를 위한 루프 분리
송태섭,Song, Tae-Seob 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.3
병렬 프로그램은 의도되지 않은 비결정적인 수행을 야기하므로 공유 메모리를 사용하는 병렬 프로그램에서는 경합을 탐지하는 것은 매우 중요하다. 수행 중 기법에서 경합을 탐지하기 위해서 요구되는 기억장소의 부담은 매우크다. 특히 동기화가 있는 병렬 프로그램에서 경합 탐지에 필요한 기억 공간의 문제는 더욱 심각하다. 그래서, 본 논문에서는 원시 프로그램의 시멘틱을 유지하면서 동기화를 가지는 공유 메모리 병렬 프로그램의 디버깅을 위한 루프 분리 기법을 제시한다. 이것은 동기화를 가지는 병렬 프로그램의 수행 중 경합 탐지에 필요로 하는 기억공간의 복잡성을 줄일 수 있고, 루프 분리된 프로그램을 수행 중에 감시하여 최초 경합들을 탐지할 수 있다. Detecting races is important for debugging shared-memory parallel programs, because the races result in unintended non-deterministic executions of the programs. Previous on-the-fly techniques to detect races in parallel programs with general inter-thread coordination show serious space overhead which depends on the maximum parallelism of the program. Therefore, this paper presents a loop splitting technique for on-the-fly race detection of parallel programs which is more efficient in space complexity than previous techniques. This loop splitting technique is the debugged program which preserves semantics of the original program. Monitering loop splitting program in on-the-fly can detect first races.
국내 전동차의 직선구간과 곡선구간에 따른 동적 시뮬레이션 승차감 평가
송태섭(Taeseop Song),이희성(Hisung Lee) 한국도시철도학회 2021 한국도시철도학회논문집 Vol.9 No.4
철도차량의 승차감은 승객의 안락도를 평가하는 척도이다. 국내 도시철도는 직선과 여러 곡선구간으로 이루어져 있다. 하지만 신조차량을 제작 시에는 형식승인과정에서 차량에 대한 직선구간의 승차감 평가만 적용되고 있다. 이에 본 논문에서는 국내 도시철도차량의 승차감 시험환경에 따라 동적 시뮬레이션으로 직선구간에 대한 승차감과 직선구간의 승차감 방법을 적용하여 곡선구간의 승차감 평가하고자 한다. The ride comfort of a railroad car is a measure to evaluate the comfort level of passengers. Domestic urban railways consist of straight lines and several curved sections. However, when manufacturing a new vehicle, only the ride comfort evaluation of the straight section of the vehicle is applied during the type approval process. Therefore, in this paper, the ride comfort in the curved section is evaluated by applying the method of riding comfort in the straight section and the ride comfort in the straight section through a dynamic simulation according to the riding comfort test environment of domestic urban railway vehicles.
송태섭(TS Song),위흥선(HS Wui),이종수(JS Lee),이주석(JS Lee),김상태(ST Kim) 대한산부인과학회 1972 Obstetrics & Gynecology Science Vol.15 No.5
1) 남성화배세포종의 1예를 75세의 고령부인에서 발생했음을 보고한다. 2) 조직학적으로 중간형임을 알았다. 3) 본증례에서는 임상적으로 명백한 남성화 증상과 적출후의 특별한 증상변화등은 없었다. A 75-year-old Korean woman, para 4, whose menopause had occured at 50, was admitted to Sacred Heart Hospital on May 25, 1970, because of progressive lower abdominal distension, child head sized palpable. mass, frequent urination, constipation, rough deeper as male voice and lower abdominal discomfortness of two months duration. On the admission, her pulse rate was 98; her blood pressure, 160/105; and respiration, 28 the lungs were clear with decreased sounds in both bases. Heart sounds were normal. There was an atrophic, clean cervix with a small uterus bushed laterally by a child head sized, cystic, smooth mass occupying the entire pelvis and lower abdomen which reached just below the umbilicus but clitoris was not so atrophic inspite of her age. Marked rough and deeper as male voice and atrophic breasts were evident. The hematocrit was 38, and the white blood cell count was normal. The patient`s urinalysis, liver function test, and biochemical profile were also normal. A lower median incision was made, and numerous fine adhesion between the parietal peritoneum and the cyst wall were freed easily by blunt dissection. The cyst was found to arise from the right ovary with the descending colon and ileum as well as the right uterus firmly adherent to it. The left ovary was atrophic. An egg sized round, hard mass was found on the mid ileum which should be metastasized from the ovary. The cyst was then removed with some difficulty, and a radical hysterectomy and segmental resection of ileum were performed. Post operatively, the patient did well except for one episode of urticarial reaction which lasting for a few hours. The patient left the hospital in good health on the 20th post operative day. The ovarian tumor had central necrosis. Histologic sections revealed the ovarian cyst and a tumor of ileum to be a intermediate type of arrhenoblastoma.
VOD 시스템에서 제어 메시지를 이용한 클라이언트 버퍼 안정화 알고리즘의 설계 및 분석
박규석(Park Kyoo Seok),송태섭(Song Tae Seob),문병철(Moon Beong Cheoul) 한국정보처리학회 1998 정보처리학회논문지 Vol.5 No.12
In this paper, we propose client buffer stabilizing algorithm which guarantees synchronization and media continuity against variability of media data and network load in the distributed multimedia environments. The proposed algorithm stabilizes the client buffer by transfering control information messages, which includes the control volume and the control time of media stream calculated on the basis of the current status of a client, to a multimedia server. The client predicts the receiver's resources and network status along with a pre-determined period, and generates control messages whenever overruns or starvations are expected to occur. The values of control messages are calculated by the status of client, the media stream transfer mechanism of multimedia server, and the status of the network. The characteristics of the proposed algorithm are proventing the low quality of media streams when it is dropped excessively and stabilizing the multimedia system when the variability of network loads is high.