가축분뇨실태조사를 위한 양분수지 산정 모델 개발

김덕우,유홍덕,임도영,정유진,김용석 한국물환경학회 2017 한국물환경학회지 Vol.33 No.6

Nutrient (i.e., nitrogen and phosphorus) budgets are required under a 'Livestock Excreta Survey'. Nutrient budget is one of the agri-environmental indicators that calculates the difference between inputs and outputs of amount of nutrients within a certain boundary and for a period (e.g., 1 year). In this study, a nutrients budget model was developed to effectively determine the surplus of nutrients within a region in Korea. C# program language was used in order to facilitate the deployment of graphical user interface (GUI) and to enhance compatibility. Also the model was developed on Windows OS which is the commonly used operating system in Korea. The model was based on the OECD/Eurostat nutrient budget method and modified to consider manure composting procedures as well. There are key features of the nutrient budget model including directly use of original data sets from various input and output sources, and collectively exchange of the address in different formats. The model can quickly show the results in various spatial and temporal resolutions with the same data, perform the sensitivity analysis with coefficients and easily compare the results using tables and graphs. Further it would be necessary to study the extension of the scope of utilization, such as the application of various nutrient budget methods, and both pre and post processings such as linking input data through online etc.

환경산업지원 및 육성방안

김덕우,Kim, Deok U 환경보전협회 1999 환경정보 Vol.21 No.1

실시간 응용시 Mini-MAP의 성능해석에 관한 연구 ( Perfromance Analysis of Mini MAP Architecture in Realtime Applications )

김덕우,정범진,권욱현 대한전자공학회 1987 대한전자공학회 학술대회 Vol.1987 No.7

계면활성제 첨가 시점에 따른 ZSM-5 재결정화의 변화에 대한 연구

김덕우,최동섭,김상빈,유은주,주지봉 유기성자원학회 2023 유기성자원학회 학술발표대회논문집 Vol.2023 No.2

임베디드 환경에서의 H.235 기반 VoIP 보안 단말 구현 및 안전성 분석에 관한 연구

김덕우,홍기훈,이상학,정수환 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.7C

본 논문에서는 ITU-T에서 제안한 VoIP 표준인 H.323 시스템의 보안 프로토콜인 H.235에 대하여 연구하고 이를 임베디드 환경의 IP Phone에 구현하여 VoIP 보안 프로토콜의 구현 요구사항 및 구현 결과에 따른 분석을 실시하였다. 특히 annex D에서 제안하고 있는 VoIP 단말에서의 보안 기능을 분석하여 구현하였는데, annex D에서는 HMAC-SHAI-96을 이용하여 인중과 무결성을 제공하고 Diffie-Hellman을 이용해서 음성 데이터 암호화에 사용되는 세션 키를 암호화해서 전달하며 음성 데이터의 암호화를 위한 RC2, DES, 3DES 등을 지원하고 있다. 또한 annex D의 안전성 및 상호 연동 문제점을 분석하여 취약점을 발견하고 보안을 강화하는 개선 방안을 제시하였다. In this paper, H.235 based security mechanism for H.323 multimedia applications was implemented in embedded environment. H.235 covers authentication using HMAC-SHAI -96, authenticated Diffie-Hellman key exchange, security capability exchange, session key management for voice encryption, and encryption functions such as DES, 3DES, RC2. H.235-based mechanisms were also analyzed in terms of its security and possible attacks.

대장암 신환의 치료 현황 분석

김덕우,정승용,김대용,손대경,임석병,장희진,정경해,정준용,최효성,박재갑 대한대장항문학회 2007 Annals of Coloproctolgy Vol.23 No.4

Purpose: In Korea, colorectal cancer (CRC) is one of the most sharply-increasing malignancies, and the National Colorectal Cancer Screening Program for persons over 50 years of age began in 2004. To determine the effectiveness of the program, comparative data regarding CRCs treated prior to 2004 must be analyzed. The present study assessed CRC status at diagnosis and treatment patterns in 2003. Methods: In 2003, 503 patients were newly diagnosed with CRC and were treated at the Center for Colorectal Cancer, National Cancer Center (NCC). Clinical data were retrospectively reviewed. Results: The 503 patients included 256 colon and 247 rectal cancer patients. Of the 256 colon cancer patients, 5 (2.0%) were diagnosed during screening colonoscopies and were successfully treated using an endoscopic mucosal resection (EMR), and 17 (6.6%) received only palliative chemotherapy because of distant metastases. Forty patients (15.6%) were treated with palliative surgery and chemotherapy, and 194 (75.8%) with curative surgery with or without adjuvant chemotherapy. Of the 247 rectal cancer patients, 9 (3.6%) were treated with an EMR, 20 (8.1%) with palliative chemotherapy with or without radiotherapy, 19 (7.7%) with palliative surgery and chemoradiotherapy, and 199 (80.6%) with curative surgery with or without chemoradiotherapy. Treatment with curative intent was possible in 199 of 256 (77.7%) colon cancer patients and in 208 of 247 (84.2%) rectal cancer patients. Conclusions: Only 12.1% of colon and 8.5% of rectal cancer patients were diagnosed early and treated without adjuvant therapies at the NCC in Korea in 2003.

복강경 대장절제술 전 대장내시경하 인디아잉크 문신술의안전성과 효용성

김덕우,손대경,최효성,장희진,한경수,임석병,정승용,박재갑 대한대장항문학회 2006 Annals of Coloproctolgy Vol.22 No.2

Purpose: Accurate tumor localization prior to a laparoscopic surgical resection is the critical. India ink tattoos properly placed in the colorectum are long lasting and have been reported to probably remain constantly in previous studies. The present study was done to review the safety and reliability of colonoscopic tattooing prior to a laparoscopic resection of a colorectal neoplasm. Methods: Between May 2003 and August 2004, 20 patients underwent colonoscopic tattooing of a colorectal neoplasm prior to laparoscopic surgery. The clinical data were retrospectively reviewed. Results: Among the 20 patients, 14 (70%) had tumors located in the sigmoid colon, 4 (20%) had tumors in the rectosigmoid junction, and 1 had a tumor (5%) in the upper rectum and descending colon. In six patients (30%) who had received an endoscopic mucosal resection (EMR), an additional surgical resection was required to remove the tumor completely, and those 6 patients needed another preoperative colonoscopy for India ink tattooing. The median time between tattooing and resection was 2 days (range: 1 to 18 days). Tattoos were visualized intraoperatively and localized the tumor accurately in 15 patients (75%). Seven patients underwent intraoperative colonoscopy; five didn't have tattoos that could be visualized intraoperatively, and two patients with visible tattoos needed intraoperative colonoscopy to confirm the site of tumor. Only one patient (5%) had mild fever with abdominal discomfort, which were relieved by hydration and administration of intravenous antibiotics for one day. Conclusions: A colorectal neoplasm can be localized with an acceptable reliability by using preoperative colonoscopic tattooing. India ink tattooing at the time of the EMR may reduce unnecessary colonoscopies if we doubt a complete resection has been achieved by using an EMR. The complications following colonoscopic tattooing were minimal.

카올린을 이용하여 합성한 계층적 제올라이트 Y를 통한 FCC 촉매에 관한 연구

김덕우,최동섭,주지봉 한국공업화학회 2023 한국공업화학회 연구논문 초록집 Vol.2023 No.0

비근점 변화를 최소화하는 간단한 융비술

김덕우,김상범,한승규,김우경 대한성형외과학회 2006 Archives of Plastic Surgery Vol.33 No.2

Nasions are flat and located more caudally in Asian than in Caucasian. Implant insertions in rhinoplasties are apt to move nasions more cephallic, which can cause unsatisfactory results in Asian. The purpose of this study is introducing a simple technique in rhinoplasty avoiding unnatural nasion in augmentation rhinoplasty in Asian patients. Multiple radiating incisions were made at nasion level on inner side of silicone implant to fit it into the curvature around the nasion. Between October 2001 and October 2003, 27 patients underwent augmentation rhinoplasties using this technique and results were evaluated. Preoperative and postoperative photographs of patients were used to measure the levels of nasion from medial canthus. The mean nasion level from medial canthus of preopertive patients were 3.46±0.87mm and postoprative patient was 4.98±0.96 mm. The mean difference between preoperative nasion level and postoperative nasion level was 1.52mm. There was no complication such as extrusion, displacement or infection. This technique of radiating incisions on inner side of the silicon implant can minimize cephalic migration of the nasion level in augmentation rhinoplasty in Asian.

학생 독서회

김덕우 대구대학교 국어교육과 1987 나랏말쌈 Vol.2 No.-