듀얼 프로세서 기반 DPI (Deep Packet Inspection) 엔진을 위한 효율적 패킷 프로세싱 방안 구현 및 성능 분석

양준호,한승재,Yang, Joon-Ho,Han, Seung-Jae 한국정보처리학회 2009 정보처리학회논문지 C : 정보통신,정보보안 Vol.16 No.4

특화된 하드웨어의 도움 없이 범용 다중 프로세서 플랫폼에서 DPI(Deep Packet Inspection) 시스템을 구현하는 방법은 비용 측면에서 매력적이다. 문제는 성능인데, 일반적으로 다중 프로세서 시스템에서는 작업들을 여러 프로세서에 적절하게 배분하는 로드밸런싱 방법과 DPI 프로세싱 전용 개별 프로세서를 지정하여 시스템의 성능을 향상 시킨다. 그러나, 우리는 DPI 시스템의 경우 위와 같은 단순한 프로세서 통제 방안이 반드시 최선책이 아니라고 생각한다. 본 논문에서는 작업의 종류에 따라 정해진 프로세서에 할당한 후, 프로세서 상태에 따라 역할을 변경하는 방식을 제안한다. 우리는 제안하는 방식을 리눅스 기반 듀얼 프로세서 시스템에 구현하고 실험을 통해 그 성능을 기존의 로드밸런싱 방식과 비교하였다. 제안된 방식에서는 하나의 프로세서는 인터럽트 처리를 포함한 일반적 패킷 프로세싱 역할만을 담당토록 하고 다른 프로세서는 DPI엔진을 전담하도록 역할로 분리시켜 캐시접근실패 (cache miss) 과 스핀락(spin lock) 발생빈도를 낮추었으며, DPI 전담 프로세서가 처리한계에 이르렀을 경우에는 두 프로세서 모두 DPI를 위해 자원을 사용토록 하여, 기존의 리눅스 로드 밸런싱 방식 DPI 시스템 대비 약 60%의 성능향상을 달성하였다. Implementation of DPI(Deep Packet Inspection) system on a general purpose multiprocessor platform is an attractive option from the implementation cost point of view, since it does not require high-cost customized hardware. Load balancing has been considered as a primary means to achieve high performance in multi processor systems. We claim, however, that in case of DPI system design simply balancing the load of each processor does not necessarily yield the highest system performance. Instead, we propose a method in which tasks are allocated to processors based on their functions. We implemented the proposed method in dual processor Linux system and compare its performance with the existing load balancing methods. Under the proposed method, one processor is dedicated to deal with interrupt handling and generic packet processing, while another processor is dedicated to DPI processing. According to experimental results, the proposed scheme outperforms the existing schemes by 60%, mainly because of the reduction of cache miss and spin lock occurrences.

검체 문의에 관한 문제점 및 개선방안

양준호,서정미,송훈강,김은정,김창호,Yang, Joon-Ho,Seo, Jung-Mi,Song, Hoon-Gang,Kim, Eun-Jung,Kim, Chang-Ho 대한핵의학기술학회 2009 핵의학 기술 Vol.13 No.3

Purpose: The work flow of international hospital's laboratory consists of rapid test and result report at the present day. However, the frequent inquiry of sample, which cause affairs to delay and efficiency to Lower, affects medical examination. In order to promote work's efficiency, we should improve the problem and make work smooth between a laboratory, outs and ward. Materials and Methods: This study runs as follows. First, Investigating test result, test schedule, test receipt, quick result, etc through the activity required from September to November 2007 about the inquiry of sample. After analysis of the problem in December, remaking the test schedule for improvement solution and reporting it to outs and ward. When the result is retest and dilution, we directly fill in a result space with the result situation of the patient to let them know beforehand. We also, prevent the omission of the result through checking the sample list and discriminate in vivo from in vitro by changing the laboratory's telephone number. We have improved the problem about the inquiry of sample through valuation and analysis since the improvement activity from January to March 2008. Result: The case about the frequent inquiry of sample has reduced by 57.8%. this improvement activity indicated that p-value<0.05 was statistically significant through paired t-test. This activity make study smooth and we rapidly report the result. Conclusion: By reducing the case regarding the inquiry of sample, work discontinuation, and concentration reduction, the work efficiency was increased.

쿠마 켄고 건축에 나타나는 그라데이션에 대한 연구

양준호(Yang, Joon-Ho),김희진(Kim, Hee Jin) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.11

Nowadays, feeling the local tradition and culture from architecture is no longer possible. A clear separation between the exterior and the interior makes it hard for a building to blend into its surroundings. There is an issue of incongruity between architecture and its natural surroundings. As a solution, Architect Kengo Kuma proposes natural architecture of gradational expressions such as the gradation from heaviness to lightness, the gradation from old to new, and the gradation from dark to light. The gradation from heaviness to lightness is represented by reducing the weight of walls, segmentation of materials, and the reduction of architectural volume. The gradation from old to new is expressed in architecture through the rebirth of materials, material upcycling, and reform of material construction methods. Gradation from darkness to light is achieved by spatial depth and by forming mediation spaces. In addition, the gradation created in this way not only changes the physical form of the building, but also induces users to experience psychological changes in this space. The gradation expressed in Kengo Kumas architecture today will lead the world not towards a dichotomous architecture, but towards a decimal architecture that offers an ambiguous space in an intermediate area where boundaries between architecture and its surroundings disappear. By restoring the diversity of architecture and nature that has been lost, the problem of incongruity between architecture and the environment will be resolved.

로켓 프리버너 노즐의 고압 분무특성 연구

양준호 ( Joon Ho Yang ),소윤석 ( Youn Seok So ),한영민 ( Young Min Han ),윤영빈 ( Young Bin Yoon ),최성만 ( Seong Man Choi ) 한국액체미립화학회 2007 한국액체미립화학회 학술강연회 논문집 Vol.2007 No.-

핵의학 체외검사의 진료재료비용 절감 방안

송훈강,서정미,양준호,김은정,김창호,Song, Hun-Kang,Seo, Jung-Mi,Yang, Joon-Ho,Kim, Eun-Jung,Kim, Chang-Ho 대한핵의학기술학회 2011 핵의학 기술 Vol.15 No.2

체외 검사는 각 검사 마다 6-7개의 standard 농도를 이용한 표준곡선(Dose response curve)을 사용하여 검사 결과를 분석하며, 표준곡선 사용은 진료재료 소모에 많은 부분을 차지하고 있다. 현재 원내에서 검사하는 검사항목 가운데 일부 검사 항목은, standard 농도를 이용한 환자의 검사 결과 분석수치가 대부분 낮은 결과의 분포를 보이고 있었으며, 이러한 검사 들은 마지막 standard 농도의 사용이 불필요하다고 판단하였다. 이에 낮은 검사 결과의 분포를 보이는 검사항목들을 선정하고, 마지막 standard 농도의 자리에 사용했던 진료 재료를 절감하여 진료재료의 소모비용을 줄였다. 원내 검사 항목 중 11개의 검사 항목을 진료재료 절감 대상항목으로 하였고, 검사가 진행한 횟수 만큼 마지막 standard농도에 사용되었던 진료재료(검사 Tube)를 절감할 수 있었다. 2009년 7월부터 2011년 2월까지 월별 진료재료 절감 개수, 절감 개수를 진료재료 단가로 계산하여 진료재료 절감액과, 절감된 진료재료를 환자 검사용 진료재료로 사용하여 발생한 수익을 ABC 원가계산을 근거로 산정하였다. 2009년 7월부터 2011년 2월까지 절감된 진료 재료는 3,131개였다. 이는 약 31kit의 검사 시약에 해당되는 진료재료를 절감하였다. 이것을 진료재료 단가로 계산하면 약 640만원의 진료재료비가 절감되었고, 이러한 진료 재료는 환자 검사 진료재료로 사용되어 약 1,370만원의 수익이 발생하였다. 환자의 검사 결과가 정상이거나, 낮게 분포하는 검사항목들은 마지막 standard 농도를 사용하지 않고 범위를 줄여서 검사를 진행하여도 검사 결과를 분석하는데는 영향이 없었고, standard 농도 범위 조정이 검사 결과의 신뢰성에는 영향이 없는 것으로 분석 되었다. 따라서 이 활동은 핵의학 체외검사의 진료재료 사용에 효율성을 높이고 진료재료 절감 및 병원 수익에 많은 효과가 있을 것으로 생각한다. Purpose: In vitro uses dose response curve with 6 to 7 standard concentrations in every examination to analyze examination results and this use of dose response curve comprises a large portion of the consumption of medicine material. At this present, some ones of in-hospital examination items have shown mostly low result of distribution in the analyzed features and these examinations have been judged that it would be unnecessary to use the last standard concentration. Hence, this study selects those examination items showing low result of distribution and reviews the cases contributed to less consumption of medicine material and revenue growth of hospital by reduction of medicine material used in the place of the last standard concentration. Materials and Methods: The study was made targeting 11 examination items out of total 43 items of the in-hospital examination and since these examination items were mostly low in the features as the examination results of patients or the examination results were distributed to show lower concentration than the previous last standard concentration, it carried out the examination without using the last standard concentration, which could generate the effect to reduce medicine material (examination tube) used in the last standard concentration as many as the number of examination carried out. For this, it examined the number of medicine material reduction by month during the period from July, 2009 to February, 2011 and estimated the reduction amount of medicine material calculated the number of reduction by the unit cost of medicine material as well as the profit generated by the reduced medicine material to use for the medicine material of patient examination. Results: The total number of medicine material reduced during the period from July, 2009 to February, 2011 was 3,131 pieces, which had the effect to reduce the medicine material equivalent to about 31 kits of reagent. To calculate this by the unit cost of the medicine material, it analyzed to reduce about 6.4 million won of medicine material cost. Also the reduced medicine materials were used for medicine materials of patient examination and this was analyzed to generate about 13.75 million won of profit based on the ABC cost accounting. Conclusion: It showed no problem in the analysis of examination result even without using the last standard concentration regarding those examination items with low distribution of the patient examination result. For these examination items, it was able to reduce medicine material used for the last standard as many as the number of examination carried out. Also, the adjustment of concentration range was found to have no problem in the reliability of examination result. Therefore, this case will be applicable in those occasions of when the analysis of patient examination result is mostly distributed at the lower level or when an examination with the distribution of patient results in the range of lower concentration than the previous last standard concentration is carried out and this is considered to increase the efficiency in the use of medicine material in vitro as well as contribute to the profit of hospitals.

연구논문 : 생명과학 ; 폴록사머 및 프로필렌글리콜을 이용한 클로트리마졸 고형 좌제의 물리화학적 특성

현경희 ( Jing Ji Xuan ),오유경 ( Yu Kyoung Oh ),김정애 ( Jung Ae Kim ),공경환 ( Kyung Hwan Gong ),김지현 ( Ji Hyun Kim ),양준호 ( Joon Ho Yang ),배명수 ( Myung Soo Bae ),김호동 ( Ho Dong Kim ),이종달 ( Jong Dal Rhee ),장현욱 ( Hye 영남대학교 약품개발연구소 2005 영남대학교 약품개발연구소 연구업적집 Vol.15 No.-

노년의 대퇴골 원위부 골절 시 동시에 시행한 전슬관절 성형술 및 금속판 내고정술 : 8예 보고 Report of Eight Cases

김동헌,장병춘,신규철,양준호 건국대학교 의과학연구소 1999 건국의과학학술지 Vol.9 No.-

Supracondylar fracture of the femur can be treated by a wide variety of methods. Although satisfactory results have been achieved with either open and closed treatment, less certain results are obtained for the elderly who have pre-existing osteoarthritis and osteoporosis. Particularly, elderly patients who have preexisting osteoarthritis are at increased risk of posttraumatic arthritis, stiff knee, persistent pain. Primary total knee arthroplasty(TKA) might obviate many of these potential problems and help to return the high-risk patient to an ambulatory functional status immediately. There are few reports about this study. The purpose of this study is to evaluate the results treated by simultaneous internal fixation and TKA for the supracondylar fracture in the elderly who have osteoarthritis of the knee joint. From 1994 to 1998, eight primary TKAs using posterior cruciate sparing PFC knee(Press Fit Condylar, Johnson & Johnson, Raynham, U.S.A) were performed after internal fixation for the supracondylar fracture of the femur with Judet plate or condylar buttress plate by conventional means. Patella was not resurfaced in all knees. According to the M ller classification of the supracondylar fracture of the femur 5 fractures were type A, 2 in type B, 1 in type C. Five patients were female, 3 patients were male. The ages ranged from 66 to 81, with an average of 74 years. Patients were followed for at least 1 year(average 3 years). The mean interval between the injury and operation was 2 weeks(range, 1 week to 4 weeks). Active knee joint exercise was encouraged in a hinge brace under the postoperative pain control. Partial weight bearing was permitted at the postoperative 4 to 6 weeks using crutches. Full weight bearing was allowed after union of the fracture. Fractures were united in all patients and the average duration of bony union was 16 weeks. The average amount of flexion and average flexion contracture for the all patients at the most recent follow-up were 96 degrees (range, 45 to 120 degrees) and 7 degrees (range, zero to 20 degrees), respectively. Using the knee rating score advocated by the American Knee Society, the average postoperative score was 87 for pain and 80 for function. We concluded that simultaneous internal fixation and TKA for supracondylar fracture of the femur in elderly patients who have advanced knee osteoarthritis may provide satisfactory pain relief and function with acceptable morbidity.

고령의 대퇴골 전자간 골절에서 시행한 양극성 고관절 반치환술

양준호,김동헌,김규현,고덕환 대한골절학회 2001 대한골절학회지 Vol.14 No.2

Purpose : To compare the timing of ambulation, complications and functional results between the autogenous femoral head graft and the calcar replacement type stem in the severe comminuted fracture of the elderly patients with unstability. Materials and Methods: 25 intertrochanteric femoral fracture patients who had bipolar hemiarthroplasty were followed for more than 1 year. 17 patients had autogenous femoral head graft and 8 patients had calcar replacement type stem. Result: The mean operating time for autogenous femoral head graft was 1.7 hours, and calcar replacement type stem was 1.3 hours. Postoperative Harris functional score was 84.1 for the autogenous femoral head graft group and 82.2 for the calcar replacement type stem group. Discussion: Both autogenous femoral head graft augmentation and fixation using the calcar replacement type stem result in rigid fixation, which enables the patients to ambulate early and to have low complication rate. Both techniques seem to be effective for the treatment of intertrochanteric fractures.

피부 견인 후 좌골 체중 부하 보조기를 이용한 소아 대퇴골 간부 골절의 치료

양준호,김동헌,오재진 대한골절학회 2000 대한골절학회지 Vol.13 No.4

Purpose: Most of the pediatric femoral shaft fractures are treated conservatively such as traction therapy followed by cast fixation. At Konkuk University Hospital, for those pediatric femoral shaft fractures that managed well with skin traction without having to perform bone traction, we utilized skin traction until callus appear on the radiologic studies. At this time, they wore ischial weight bearing braces were and forced on early ambulation with satisfactory result. Material and Methods: The pediatric patients between 2 to 10 years of age with femoral shaft fractures during January 1993 to January 1997 were selected for the study. They were treated with skin traction followed by wearing ischial weight-bearing braces. From the 39 selected cases, we selected 32 cases with 1-year follow-ups. For each case, results from before and after the treatment were studied Results: The average post-therapy angular changes were that the varus angle change was 10.2, anterior 10.6. There were 7 cases of malunion, 6 cases of anterior angle change, 1 case of varus angle change. The average duration of skin traction was 4.3 weeks and initiation of weight-bearing was 5.8 weeks. We observed 6 cases of limb- length discrepancy, but no signs of claudication in any cases. Conclusion: In pediatric femoral shaft fractures, if the alignment is maintained well, then we can utilize skin traction followed by ischial weight-bearing braces, which enables earlier ambulation than the cast fixation. Also skin traction and weight-bearing braces has less complication than the cast fixation.

충주시 농촌지역 주민들에 대한 보건교육 평가

권복규,양준호,송진범,이건세,이원진,장성훈 건국대학교 의과학연구소 1996 건국의과학학술지 Vol.5 No.-

The aim of this study was to evaluate the effect of health education program in Choongju rural area which had conducted by Public Health Doctor during winter in 1994 and 1995. We used two step sampling method for a household survey. First, six were selected from 12 Myuns, which were stratified by the level of health education activity. Second, we applied convenient sample method. Of the 307 respondents, most of them knew Health-subcenter's existence in their region. However, only 149 persons(45%) visited it during last year. They visited Health-subcenter because it was easy to travel and convenient. Some of them thought that Health-subcenter had very poorly equipped and supplied. About 32∼34% of respondents participated the health education program for hypertension and diabetes mellitus which was done last winter, and 59∼70% of participants of the program answered that it was very, moderately helpful. 82∼83% of participants recognized complications of hypertension and diabetes mellitus, and 18∼20% of them did not know that medications of hypertension and diabetes mellitus should be continued one's whole life. The respondents want to receive health educations for cancer, arthritis, viral hepatitis and AIDS in orders. Many of rural residents utilize Health-subcenters because health clinics in Choongju rural area are very few.