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유비쿼터스 프로세스 관리: 이벤트 기반의 서비스 프로세스 실현
박종헌,정재윤 에스케이텔레콤 (주) 2006 Telecommunications Review Vol.16 No.4
프로세스 실행 기술은 서비스 합성을 통하여 사용자에게 향상된 서비스르 제공한다. WS-BPEL과 WS-CDL 같은 프로세스 표준은 비즈니스 영역에서 절차적 서비스 구성을 통하여 웹 서비스의 활용을 가속화시켰다. 유비쿼터스 환경 또한 네트워크에 산재되 ㄴ다양한 통신기기 및 서비스의 절차적 구성을 통하여 향상된 사용자 서비스를 제공할 수 있다. 그러나 유비쿼터스 환경의 통신기기들은 컴퓨팅 파워와 저장공간의 제약 및 불안정한 네트워크로 인하여 기존의 중앙집중화된 프로세스 코디네이션을 적용하는데 어려움이 있다. 본 연구에서는 유비쿼터스 환경에서의 서비스 프로세스 실현을 위하여 통신기기간의 P2P 네트워크를 바탕으ㅗ 한 이벤트 기반의 분권적 프로세스 실행 프레임워크를 제안하였다. 이 프레임워크에서 기기들은 웹 서비스 이벤트를 바탕으로 서로 협력하며 자신에게 할당된 하위 프로세스를 ECA(Event-Condition-Action) 규칙에 기반하여 실행한다. 본 논문에서는 웹 서비스 기반의 ECA규칙 스키마와 메시지 프로토콜을 활용한 유비쿼터스 프로세스 프레임워크를 제시하고 홈 네트워크 예제를 사용하여 이벤트 기반의 유비쿼터스 프로세스를 실현하는 방법을 설명하였다. 본 연구에서 제안한 유비쿼터스 프로세스 관리 기술은 웹 서비스 표준 기술을 바탕으로 한 경량적 프로세스 실행을 가능하게 함으로써 사용자 중심의 향상된 서비스 네트워크 구성에 기여할 것으로 기대된다.
박종헌,연재우,한은미,장석기,강수민,안인옥 대한영상의학회 2007 대한영상의학회지 Vol.57 No.6
A malignant fibrous histiocytoma of the mesentery is rare, and multifocal involvement as a primary tumor is very rare. In this report, a case of malignant fibrous histiocytoma of the mesentery presenting with two masses and multiple peritoneal seeding in a 48-year-old man is described. A physical examination revealed a large, firm, and non-tender mass in the right lower abdomen of the patient. Computed tomography of the lesion revealed a partially, indistinctly marginated and heterogeneously enhancing mass with irregular peritumoral strands in the mesentery of the right lower abdomen, while sonograms of the lesion revealed an ill-defined low-echoic mass. The final pathology demonstrated the presence of a storiform-pleomorphic malignant fibrous histiocytoma. 장간막에 생기는 악성 섬유성조직구종은 드문 원발성 종양이며 다발성으로 생기는 경우는 매우 드물다. 저자들은 최근 발생한 우하복부에 만져지는 종괴를 주소로 내원한 48세 남자 환자에서 장간막에 발생한 두개의 커다란 종괴와 복막 암종증이 동반된 1예를 경험하였기에 초음파, 컴퓨터단층촬영 및 조직 병리소견을 함께 보고하고자 한다. 이 종괴는 초음파에서 경계가 불분명한 저에코로 보였고 컴퓨터단층촬영에서는 부분적으로 경계가 불분명한 불균한 조영증강을 보였으며 주변으로 불규칙한 선상 구조물들이 있었다. 최종 병리 진단은 장간막에서 발생한 다형성 악성 섬유성조직구종이었다.
Malignant Pure Pulmonary Ground-Glass Opacity Nodules: Prognostic Implications
박종헌,이경수,김지혜,심영목,최용수,이진아,김진국 대한영상의학회 2009 Korean Journal of Radiology Vol.10 No.1
Objective: This study was designed to evaluate follow-up results in terms of patient prognosis for malignant pulmonary nodules depicted as pure groundglass opacity (GGO) lesion observed at high-resolution CT (HRCT). Materials and Methods: Surgical removal for malignant GGO nodules was accomplished in 58 patients (26 men, 32 women; mean age, 57 years; age range, 29-78 years). Patient prognoses were assessed by patient clinical status and the presence of changes in nodule size determined after a follow-up HRCT examination. Differences in patient prognoses were compared for nodule number, size, surgical method, change in size before surgical removal, and histopathological diagnosis by use of Fisher’s exact test and Pearson’s chisquared test. Results: Of the 58 patients, 40 patients (69%) were confirmed to have a bronchioloalveolar carcinoma (BAC) and 18 patients (31%) were confirmed to have an adenocarcinoma with a predominant BAC component. Irrespective of nodule size, number, treatment method, change in size before surgical removal and histopathological diagnosis, neither local recurrence nor a metastasis occurred in any of these patients as determined at a follow-up period of 24 months (range; 12-65 months). Of 14 patients with multiple GGO nodules, all of the nodules were resected without recurrence in six patients. In the remaining eight patients, the remaining nodules showed no change in size in seven cases and a decrease in size in one case as determined after a follow-up CT examination. Conclusion: Prognoses in patients with pure GGO malignant pulmonary nodules are excellent, and not significantly different in terms of nodule number, size, surgical method, presence of size change before surgical removal and histopathological diagnosis. Objective: This study was designed to evaluate follow-up results in terms of patient prognosis for malignant pulmonary nodules depicted as pure groundglass opacity (GGO) lesion observed at high-resolution CT (HRCT). Materials and Methods: Surgical removal for malignant GGO nodules was accomplished in 58 patients (26 men, 32 women; mean age, 57 years; age range, 29-78 years). Patient prognoses were assessed by patient clinical status and the presence of changes in nodule size determined after a follow-up HRCT examination. Differences in patient prognoses were compared for nodule number, size, surgical method, change in size before surgical removal, and histopathological diagnosis by use of Fisher’s exact test and Pearson’s chisquared test. Results: Of the 58 patients, 40 patients (69%) were confirmed to have a bronchioloalveolar carcinoma (BAC) and 18 patients (31%) were confirmed to have an adenocarcinoma with a predominant BAC component. Irrespective of nodule size, number, treatment method, change in size before surgical removal and histopathological diagnosis, neither local recurrence nor a metastasis occurred in any of these patients as determined at a follow-up period of 24 months (range; 12-65 months). Of 14 patients with multiple GGO nodules, all of the nodules were resected without recurrence in six patients. In the remaining eight patients, the remaining nodules showed no change in size in seven cases and a decrease in size in one case as determined after a follow-up CT examination. Conclusion: Prognoses in patients with pure GGO malignant pulmonary nodules are excellent, and not significantly different in terms of nodule number, size, surgical method, presence of size change before surgical removal and histopathological diagnosis.
박종헌,김대봉,신미경,장석기,강수민,안인옥 대한영상의학회 2007 대한영상의학회지 Vol.57 No.5
A primary mucosa-associated lymphoid tissue lymphoma (MALT lymphoma) of the breast is extremely rare. We report a case of a MALT lymphoma of the breast that presented as a palpable left breast mass in a 37-year-old woman. A physical examination revealed a large firm, and fixed mass in the left inner breast. Mammograms showed a large, isodense mass in the lower inner quadrant of the left breast and an enlarged lymph node in the axilla. A sonogram demonstrated a 5 cm sized, oval, circumscribed, and heterogeneously hypoechoic mass with posterior acoustic enhancement. A surgical biopsy was performed, and the pathology revealed a MALT lymphoma. 유방의 일차성 점막관련림프조직 림프종은 아주 드문 질환이며 국내에는 영상소견이 보고된 적이 없어 저자들은 좌측 유방의 만져지는 종괴를 주소로 내원한 37세 여자 환자에서 1예를 경험하였기에 유방촬영술 및 초음파 소견을 보고하고자 한다. 이학적 검사에서 단단한 종괴가 좌측 유방의 내측에서 만져졌으며 고정되어 있었다. 유방촬영술에서는 좌측 유방 내측에 실질조직과 비슷한 음영의 종괴로 보였으며 내부에 석회화는 보이지 않았다. 초음파 검사에서 모양은 난원형이고 경계가 좋으나 내부는 불균일한 저에코의 병변을 보이면서 후방 음영 증강을 동반하는 5 cm 크기의 종괴였다.
Hull-form optimization of KSUEZMAX to enhance resistance performance
박종헌,최정은,전호환 대한조선학회 2015 International Journal of Naval Architecture and Oc Vol.7 No.1
This paper deploys optimization techniques to obtain the optimum hull form of KSUEZMAX at the conditions of full-load draft and design speed. The processes have been carried out using a RaPID-HOP program. The bow and the stern hull-forms are optimized separately without altering neither, and the resulting versions of the two are then combined. Objective functions are the minimum values of wave-making and viscous pressure resistance coefficients for the bow and stern. Parametric modification functions for the bow hull-form variation are SAC shape, section shape (U-V type, DLWL type), bulb shape (bulb height and size); and those for the stern are SAC and section shape (U-V type, DLWL type). WAVIS version 1.3 code is used for the potential and the viscous-flow solver. Prior to the optimization, a parametric study has been conducted to observe the effects of design parameters on the objective functions. SQP has been applied for the optimization algorithm. The model tests have been conducted at a towing tank to evaluate the resistance performance of the optimized hull-form. It has been noted that the optimized hull-form brings 2.4% and 6.8% reduction in total and residual resistance coefficients compared to those of the original hull-form. The propulsive efficiency increases by 2.0% and the delivered power is reduced 3.7%, whereas the propeller rotating speed increases slightly by 0.41 rpm.