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        • KCI등재

          Linux 기반의 Diffserv 라우터 구현 및 성능 분석

          황진호,김영한,신명기 한국정보과학회 2002 정보과학회논문지 : 정보통신 Vol.32 No.2

          In this paper, we implement a diffserv-capable router on the linux system and evaluate its performance. The router supports the packet marking for the input links that is different from the previous implementation. The edge diffserv-capable router can guarantee the performance of each class, even in a congested condition. We compare the performance of the diffserv-capable router with that of the normal router in terms of PDBs (per domain behaviors), which are defined with traffic conditioning rules and PHBs (per hop behaviors). 본 논문에서는 차등화서비스모델(differentiated service model)를 지원하는 라우터를 리눅스상에서 구현하였다. 구현한 라우터는 기존 구현과 달리 입력 단에서부터 패킷마킹이 가능하도록 하였다. 입력 단에서부터 패킷마킹이 가능한 에지 라우터는 네트워크 병목현상이 발생한 경우에도 각 클래스간 독립적으로 서비스를 보장해 줄 수 있다. 구현된 라우터는 기존 라우터와의 성능비교를 하였으며, 망의 입력 라우터의 트래픽 조절 규칙과 망 내의 PHB(per hop behavior) 특성을 규격화하여 정의되는 PDB(per domain behavior) 실험을 통하여 성능을 측정하며 검증하였다.

        • KCI등재

          Ectopic ACTH Syndrome and Severe Hypokalemia Associated with Suspicious Pancreatic Malignancy: A Case Report

          황진호,한승석,조은진,김동기,오국환,주권욱,김연수,한진석,김성권,안규리 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.5

          A 72-year-old woman had a 1-month history of general weakness. Previously, after rectal cancer was treated with a low anterior resection, 12 cycles of adjuvant chemotherapy with 5-fluorouracil plus leucovorin was undergone. Follow-up examination showed no evidence of recurrence. However, she suffered from general weakness attributable to hypokalemia, which was refractory to potassium replacement therapy. After further work-up of the hypokalemia, Cushing’s syndrome and ectopic adrenocorticotropic hormone (ACTH) syndrome were diagnosed from the laboratory findings that included a markedly elevated level of 24-hour urine-free cortisol. Several imaging studies revealed masses of the pancreas and other organs, which was more likely to be pancreatic cancer. This case is interesting in that cancerous lesions were identified during work-up of hypokalemia.

        • KCI등재
        • KCI등재

          전립선동맥 색전술: 증상이 있는 양성 전립선 비대증 치료

          황진호,박상우 대한영상의학회 2019 대한영상의학회지 Vol.80 No.4

          Prostatic artery embolization (PAE) is an emerging treatment option for lower urinary tract symptoms (LUTS) caused by benign prostatic hyperplasia (BPH). PAE is a minimally invasive technique and provides good results in BPH patients with moderate-to-severe LUTS. Most patients with BPH are old and have atherosclerosis. PAE can be technically challenging in these patients because of the tortuosity and small diameters of prostatic arteries. Therefore, patient selection is essential for successful results. To perform a safe procedure with no non-target embolization, precise knowledge of the prostatic arterial anatomy and meticulous techniques are important. A multidisciplinary approach by interventional radiologists and urologists is essential to achieve better outcomes. 전립선동맥 색전술은 양성 전립선 비대증으로 인한 하부요로증상 개선을 위한 새로운 치료방법이다. 전립선동맥 색전술은 중등도 및 중증의 하부요로증상을 보이는 환자에게 최소 침습적인 방법으로 좋은 결과를 제공할 수 있다. 양성 전립선 비대증 환자의 대다수는 고령이며, 사행성, 죽상 경화성 및 작은 크기의 전립선 동맥은 시술의 난이도를 높이는 원인이 되므로 성공적인 결과를 기대하기 위해서는 환자 선택이 중요하다. 원치 않는 부위의 색전 없이안전한 시술을 시행하기 위해서는 전립선동맥 해부학에 대한 정확한 지식뿐만 아니라 시술시 세심한 기술이 필요하다. 인터벤션 영상의학과와 비뇨기과 사이에 긴밀한 협력은 더 나은결과를 얻는 데 있어서 도움이 될 수 있다.

        • KCI등재

          Clinical Factors That Predict Successful Posterior Urethral Anastomosis With a Gracilis Muscle Flap

          황진호,강문형,이영태,박동수,이승렬 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.10

          Purpose: We evaluated the preoperative clinical factors that affect the surgical outcome of posterior urethral anastomosis (PUA) with a gracilis muscle flap (GMF) to determine which factors predict benefit from the use of the GMF. Materials and Methods: This was a retrospective analysis of 49 patients who underwent a delayed PUA with a GMF. A successful clinical outcome was defined as achieving a peak urinary flow rate greater than 15 mL/s at 3 and 12 months postoperatively without evidence of stricture recurrence on a retrograde urethrogram or cystourethroscopy at 3 months postoperatively. Multiple clinical factors were evaluated by use of univariate and multivariate analyses. Results: The outcome of 21 of 49 patients (42.9%) was deemed successful. The mean age of the 49 patients was 37.2±13.5 years and the mean follow-up duration was 43.4±28.0 months. The length of the urethral defect was significantly shorter in patients with a successful outcome than in patients with an unsuccessful outcome (p=0.010). The outcome differed significantly depending on whether the patients had a previously successful urethroplasty (p=0.036) or whether they had suffered a pelvic bone injury (p=0.012). Multivariate logistic regression analyses revealed that a previous urethroplasty was the only preoperative clinical factor that significantly affected the surgical outcome in PUA with a GMF (odds ratio, 0.218; 95% confidence interval, 0.050 to 0.947; p=0.042). Conclusions: A history of previous urethroplasty is a preoperative clinical factor that significantly affects the surgical outcome in PUA with a GMF; the procedure is more likely to be successful in patients who have not previously undergone urethroplasty.

        • KCI등재

          Myocardial Bridging of the Left Anterior Descending Coronary Artery: Depiction Rate and Morphologic Features by Dual-Source CT Coronary Angiography

          황진호,고성민,노홍기,송명근,신제균,지현근,김준석 대한영상의학회 2010 Korean Journal of Radiology Vol.11 No.5

          Objective: To evaluate the depiction rate and morphologic features of myocardial bridging (MB) of the left anterior descending coronary artery (LAD) using dual-source CT (DSCT). Materials and Methods: CT scans from a total of 1,353 patients who underwent DSCT were reviewed retrospectively for LAD-MB. Seventy-eight patients were excluded due to poor image quality or poor enhancement of the coronary artery. The length and depth of the MB were analyzed and classified as superficial or deep with respect to the depth (≤ 1 or > 1 mm) of the LAD tunneled segment. Superficial MB was subdivided into complete or incomplete types according to full or partial encasement of the myocardium. Results: Of the 1,275 patients included in this study, 557 cases of MB were found from 536 patients (42%). Superficial MB was observed in 368 of 557 (66%) cases, and deep MB was seen in 189 of 557 (34%) cases. Superficial MB showed 2 types: complete (128 of 368, 35%) and incomplete (240 of 368, 65%). The mean length of a tunneled segment for superficial MB was 16.4 ± 8.6 mm. The mean length and depth of a tunneled segment for deep MB were 27.6 ± 12.8 mm and 3.0 ± 1.4 mm, respectively. The incidence of atherosclerotic plaques in a 2-cm-long segment proximal to MB was 16%. Conclusion: The depiction rate of LAD-MB using DSCT in a large series of patients was 42%, with two-thirds of MB segments being the superficial type. Objective: To evaluate the depiction rate and morphologic features of myocardial bridging (MB) of the left anterior descending coronary artery (LAD) using dual-source CT (DSCT). Materials and Methods: CT scans from a total of 1,353 patients who underwent DSCT were reviewed retrospectively for LAD-MB. Seventy-eight patients were excluded due to poor image quality or poor enhancement of the coronary artery. The length and depth of the MB were analyzed and classified as superficial or deep with respect to the depth (≤ 1 or > 1 mm) of the LAD tunneled segment. Superficial MB was subdivided into complete or incomplete types according to full or partial encasement of the myocardium. Results: Of the 1,275 patients included in this study, 557 cases of MB were found from 536 patients (42%). Superficial MB was observed in 368 of 557 (66%) cases, and deep MB was seen in 189 of 557 (34%) cases. Superficial MB showed 2 types: complete (128 of 368, 35%) and incomplete (240 of 368, 65%). The mean length of a tunneled segment for superficial MB was 16.4 ± 8.6 mm. The mean length and depth of a tunneled segment for deep MB were 27.6 ± 12.8 mm and 3.0 ± 1.4 mm, respectively. The incidence of atherosclerotic plaques in a 2-cm-long segment proximal to MB was 16%. Conclusion: The depiction rate of LAD-MB using DSCT in a large series of patients was 42%, with two-thirds of MB segments being the superficial type.

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