이기종 환경에서의 벤치마크 성능 분석

문현주(Hyun-ju Moon),전중남(Joong-Nam Jeon),김석일(Sukil Kim) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.2B

이기종 시스템은 상이한 연산 특징을 지닌 다수의 머신을 네트워크로 연결하여 빠른 계산을 가능하도록 한다. 따라서 단일 기종 시스템과는 달리, 이기종 시스템의 성능을 측정하기 위해서는 프로그램별로 코드의 특성을 분석하고 알맞은 머신을 선정해야하는 절차가 필요하며, 이 과정에서 머신간의 통신에 따른 비용을 감안하여야 한다. 본 논문에서는 벡터 컴퓨터와 MPP 컴퓨터로 구성된 이기종 환경에서 통신 비용이 시스템의 성능에 미치는 영향을 연구하였다. 본 연구에서는 SLALOM 벤치마크 프로그램을 사용하였으며, SLALOM의 모듈별 프로파일링을 통하여 이기종 연산 방안을 수립하고 통신 오버헤드를 문제 크기에 관한 함수로 표현하여 이기종 연산에 의한 성능을 예측하였다. 실험 결과, 사용할 MPP의 노드 수가 이기종 연산에 미치는 효과가 큰 것으로 판명되었으며, 프로그램에 따라 사용할 노드 수를 결정할 수 있음을 확인하였다.

분류변경을 통한 이익조정

문현주 ( Hyun Ju Moon ) 한국회계학회 2013 회계저널 Vol.22 No.2

With regards to disclosure of operating profit and loss of listed companies in which Korean International Financial Reporting Standards (K-IFRS) is applied in 2011, the criticism of academia and the media has been raised. Operating profit and loss is one of the important information in the analysis of company, but disclosure of information bring more confusions to investors. Unlike the existing company accounting standards, companies that prepare the financial statements separately create operating profit and loss in the comprehensive income statement or disclose it as annotation and disclose main items included in calculation of operating profits and loss, and the amount as annotation in K-IFRS. However, the form and components of operating profit can be autonomously determined by managers to fit to the economic reality. The introduction of K-IFRS will bring a result in which opportunity to convert items of operating profit and loss to the surplus is provided to company which wants to avoid the occurrence of expense due to disclosure of loss. From this prospective, this study investigates the profit adjustment caused by classification shift between items of operating profit and loss of managers targeting 40 Iisted companies reporting loss for three years in a row with strong intention to convert operating profit and loss into the surplus. Upon looking at result of analysis, it is found that listed companies reporting deficit for three years in a row convert operating profit which is the core profit into surplus and favorable items are included in operating profit and unfavorable items are included in additional item (other loss) to avoid administrative issue and liquidation. Above results will become the empirical basis to give a help when listed companies consolidation measures and standards for operating profit and loss are reestablished by accounting standard policy makers.

개별발생액접근법을 통한 은행의 이익관리연구

문현주 ( Hyun Ju Moon ) 한국회계학회 2004 회계학연구 Vol.29 No.2

The study examines the opportunistic accounting choice for loan loss provisions by Korean banks during the period from 1995 to 2001. Bank managers are concerned with reported earnings and the associated balance sheet numbers because investors, creditors and other stakeholders rely on reported financial statement numbers to make economic decisions. I investigate whether banks with poor (or good) performance adjust loan loss provisions to manage earnings. For example, banks with low (or high) levels of nondiscretionary current earnings are expected to decrease (or increase) loan loss provisions. Nondiscretionary current earnings, which are defined as net income before discretionary accruals, exhibit a significant positive relation with loan loss provisions. This result is consistent with the earnings management hypothesis where banks smooth earnings over time. The loan loss provisions of banks could have changed over time in response to a shift in business from, say, industrial loans to consumer loans or other loans. The results reveal that industrial loans have a significantly positive relationship with loan loss provisions, while consumer loans have not. Additionally, I investigate whether the managers` use of loan loss provisions to signal private information about a future bank`s capability to absorb the reduction in earnings. If signaling is an important incentive in choosing loan loss provisions, then I should observe a positive relation between loan loss provisions and changes in nondiscretionary current earnings. The results reveal that loan loss provisions signal good news about future prospects. This study is expected to contribute to enriching the literature on bank loan loss provisions in terms of the methodology and providing policy implications for bank regulatory agencies.

캐시 주소의 태그 이력을 활용한 에너지 효율적 고성능 데이터 캐시 구조

문현주,지승현,Moon, Hyun-Ju,Jee, Sung-Hyun 한국정보처리학회 2007 정보처리학회논문지 A Vol.14 No.1

모바일 기기와 같이 배터리에 의존적인 시스템에서 사용되는 임베디드 프로세서는 총 소모 전력의 많은 부분을 캐시에서 소모한다. 본 논문에서는 임베디드 프로세서용 고성능 선인출 데이터캐시의 저전력화 방안을 연구하였다. 고성능 선인출 데이터캐시에서 메모리 참조명령의 수행에 앞서 참조예측의 결과로 발생하는 선인출 명령은 캐시 적중률을 높여 메모리 참조 시간을 단축하는 반면 선인출 명령의 수에 비례하여 전력 소모가 증가한다. 본 논문에서는 선인출 데이터캐시에 태그이력표(tag history table)를 구비하여 병렬태그탐색을 최소화함으로써 전력 소모를 줄이는 캐시 구조를 제안하였다. 실험을 통해 확인한 결과 제안한 데이터캐시 구조가 기존 데이터캐시 구조에 비하여 수행 시간과 전력 소모를 모두 줄일 수 있음을 확인하였다. Uptime of embedded processors for mobile devices are dependent on battery consumption. Especially the large portion of power consumption is known to be due to cache management in embedded processors. This paper proposes an energy efficient data cache structure for high performance embedded processors. High performance prefetching data cache issues prefetching instructions before issuing demand-fetch instructions based on reference predictions. These prefetching instruction bring reduction on memory delay by improving cache hit ratio, but on the other hand those increase energy consumption in proportion to the number of prefetching instructions. In this paper, we adopt tag history table on prefetching data cache for reducing energy consumption by minimizing parallel tag comparison. Experimental results show the proposed data cache improves performance on energy consumption as well as memory delay.

미디어 데이터의 빠른 참조를 위한 캐시 운영 전략

문현주,김석일,Moon, Hyun-Ju,Kim, Suk-il 한국정보처리학회 2004 정보처리학회논문지 A Vol.11 No.1

스트리밍 형태로 처리되는 멀티미디어 응용 데이터는 공간적 지역성은 큰 대신 시간적 지역성이 낮은 특징이 있다. 이 논문에서는 멀티미디어 응용 데이터에 내재된 메모리 참조의 규칙성을 활용하는 동적 선인출 기법을 제안하였다. 제안된 기법은 배열을 작은 블록으로 나누어 블록별로 계산을 수행하는 응용 프로그램의 경우에 기존의 방법과 비교하여 선인출 에러를 크게 줄일 수 있다. 여러 가지 미디어 벤치마크에 대한 실험 결과, 제안된 기법이 기존의 선형 선인출 기법에 비하여 예측의 정확도가 높고 성능이 우수함을 확인하였다. Multimedia data processing in streaming pattern contains high spatial locality and low temporal locality. This paper has proposed a dynamic data prefetching scheme that fully exploits the regularity between memory addresses referred consecutively. Compared to the existing data Prefetching scheme, the Proposed scheme can reduce data Prefetching error when an application divides an way into smaller blocks and processes them block by block. Experimental results on various media benchmark programs show the proposed scheme predicts memory addresses more accurately and results in better performance than existing prefetching schemes.

다양한 자세에 따른 복부 할로잉과 브레이싱 수축시 체간근 활성도의 차이

문현주 ( Hyun Ju Moon ),조성학 ( Sung Hak Cho ),구봉오 ( Bong Oh Goo ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.1

PURPOSE: The purpose of this study was to investigate the difference of trunk muscles activity during abdominal hollowing and bracing contraction in various position. METHODS: This pilot test was carried out in a volunteer sample of normal adults(n=24) without a history of low back pain or injury. 24 subjects were randomly allocated to three groups(n=8) as a contraction method respectively. In hooklying position, trunk muscles activity of subjects was measured using EMG in various bridging position. RESULTS: Abdominal bracing contraction made to more great trunk deep and superficial muscles activity than hollowing contraction.(p<0.00) Especially, Multifidus activity was the biggest.(p<0.00) CONCLUSION: The result from this study showed that abdominal bracing contraction made to more balancing activity of trunk muscles than abdominal hollowing contraction. Thus, It will good for trunk muscles unbalanced LBP patient to improve lumbar stabilization.

고관절 내전근 수축이 복횡근의 두께변화에 미치는 영향

문현주 ( Hyun Ju Moon ),구봉오 ( Bong Oh Goo ) 대한물리의학회 2011 대한물리의학회지 Vol.6 No.3

Purpose:The present study invesigated the effect of changes in transversus abdominis thickness using ultrasonography during a hip adductor contraction. Methods:This study was carred out in a volunteer sample of adults (N=30) without a history of low back pain or injury. In standing position, muscle thickness measurements of transversus abdominis(TrA) were measured using ultrasonography at rest and during a hip adducor contraction. Results:TrA thickness were influenced a hip adductor during a voluntary contraction in people without LBP. TrA showed significantly greater thickness changes on a hip adductor contraction.(p=0.000) Conclusion:The results from this study showed that the hip adductor contraction improves the ability to increase change in TrA thickness. These results can be a good evidence to prevent low back pain due to hip adductor weakness or genu varum deformity of knee osteoarthritis.

통신의 영향을 줄이기 위한 이기종 태스크 스케쥴링 기법

문현주(Moon Hyun Ju),전중남(Jeon Joong Nam),김석일(Kim Suk II),황인재(Hwang In Jae) 한국정보처리학회 1998 정보처리학회논문지 Vol.5 No.10

This paper proposes Heterogeneous Duplication Scheduling(HDS) which alleviates excessive communication overhead between tasks for distributed computing on a heterogeneous distributed environment. HDS is to allocate a copy of a task that causes excessive data communication with a message-receiving task to the same machine wherein the message-receiving task is scheduled. The proposed algorithm allows only the duplication of parent tasks so as not to increase the complexity of the algorithm. Simulation on various type of task graphs provides that the scheduling results by using HDS are better than those by using the existing heterogeneous scheduling schemes.

혈중 항뮬러관호르몬 저하를 진단 받은 난임 환자의 한방치료 후 임신 4례

문현주 ( Hyon Ju Moon ),조현주 ( Hyun Ju Cho ) 대한한방부인과학회 2015 대한한방부인과학회지 Vol.28 No.2

Objectives: AMH (Anti-Mullerian Hormone) is considered a sensitive marker of ovarian reserve, and it tends to be included among basic fertility tests. This paper is to report four pregnancies which were achieved by subfertile women with low AMH level after Korean medical treatments. Methods: Four cases of pregnancy by subfertile women, aged 34 to 37, with low AMH level (0.04 to 0.76 ng/mL), after Korean medical treatments between July 2012 and May 2015, were analysed. The patients were diagnosed as Kidney deficiency (腎虛), Blood extravasation (瘀血) and/or Liver Qi stagnation (肝氣 鬱結). Herbal medicine, acupuncture, pharmacopuncture and moxibustion treatments were applied. Results: The four subfertile women with low AMH level achieved pregnancy after Korean medical treatments. Conclusions: The case report suggests that Korean medical treatment can be an effective option for subfertile women with low AMH level before Assisted Reproductive Technology.

측두하악관절장애 환자에서 연속초음파와 맥동초음파 적용이 통증과 관절가동범위에 미치는 효과

문현주,서현규,공원태,Moon, Hyun-Ju,Seo, Hyun-Kyu,Gong, Won-Tae 대한정형도수물리치료학회 2007 대한정형도수물리치료학회지 Vol.13 No.2

Purpose: The purpose of this study was to determine the effect of continuous wave ultrasound and pulsed wave ultrasound that influence changes in pain and range of motion when applied to patients with temporomandibular joint disability. Methods: The subjects of the study were 40 selected patients who had been diagnosed with temporomandibular joint movement restriction and had endured pain for more than two weeks. These patients had visited K orthopedic surgery in Deagu measured from October 1, 2004 to March 31, 2005. The subjects were divided into two groups with 20 patients each. The one group was applied to continuous wave ultrasound and the other group was applied to pulsed wave ultrasound at a dosage of 1.5 W/$cm^2$ for a duration of 5 minutes and eight times for two weeks. The pain perception degree were measured by using Visual Analogue Scale(VAS) and the range of motion was measured by using a rule for each group. Results: The results obtained were as follows The change in the pain perception degree were statistically significant in both group(p<0.05) ; however, the continuous wave ultrasound group showed more difference in the average decrease in the pain perception degree than did the pulsed wave ultrasound group. Both groups showed significant results regarding changed in the range of motion(p<0.05) ; Comparing the difference in the average of the range of motion between the two groups, came back from normal the range of motion of temporomandibular joint at the both groups. Conclusion : Based on the results of this study, we found that both groups showed decreased pain and increased the range of motion, but the continuous wave ultrasound method had a higher therapy effect pain and the range of motion than the pulsed wave ultrasound method to patients with temporomandibular joint disability. With such finding, we expect that according to ultrasound therapy applicant method can be helped usable accurately to patients with variety symptoms temporomandibular joint disability.