물류 서비스 프로세스 기반 물류 파트너 평가 프레임워크 구축에 관한 연구

김승범,편제범,최동현 한국경영과학회 2022 한국경영과학회 학술대회논문집 Vol.2022 No.6

Dynamic Version of Single Stage Lot-Sizing Rules

김승범 亞州大學校 1990 論文集 Vol.13 No.-

현재 MRP(Material Requirements Planning 자재소요계획기법) 사용자들은 주문량을 결정하기 위해 EOQ(Economic Order Quantity),LTC(Least Total Cost)등의 주문량 결정규칙을 사용하고 있다. 이 논문에서는 기본적인 EOQ,POQ,LTC등의 주문량 결정규칙을 수정한 새로운 규칙을 개발하고, 그 효과를 시험하였다. EOQ 및 POQ규칙에 대한 수정은 수요상황의 동태적 변동상황을 보다 긴밀하게 추적할 수 있도록 하였다. 또한 LTC규칙에 대한 수정은 주문량을 결정할 때 포함되는 최종기간의 수요를 포함할 것인가의 여부에 관한 의사결정을 보다 합리적으로 내려질 수 있도록 하였다. 당초의 기본적인 규칙들, 동태적 수요상황을 보다 긴밀히 반영하도록 수정된 규칙들 및 최적주문량을 계산해내는 Wagner-Whitin 演算方式 등 세가지 방식을 수요상황에 적용하여, 그 경제적 성과를 검토한 실증조사 결과, 수정된 규칙들의 성과가 기본 규칙에 비해 우수하고, 최적성과에 근접한 것으로 나타났다. 즉 비용절감의 측면에서 볼 때,수정규칙은 기본규칙의 성과의 81%내지 98%에 해당되는 원가절감 효과를 나타내고 있다. 또한 수정규칙은 조사사례의 84% 내지 88%의 경우에 최적해를 도출해 내었다. 나머지 사례에서는 최적해에 대비하여 불과 0.53% 내지 1.41%의 비용증대효과가 나타났다.

상부구조물과 금원주를 레진시멘트로 접착시킨 임프란트 보철물의 파절에 대한 연구

김승범,배정식,Kim, Seung-Beom,Bae, Jeong-Sik 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.3

This study was performed to determine the failure strength and pattern of implant prosthesis luted with resin cement between gold cylinder and superstructure, and to evaluate the bonding strength of resin cement. To evaluate failure strength and pattern, the groups were divided into 2. Group 1 : Casted gold cylinder Group 2 : Luted with resin cement between gold cylinder ans superstructure. To evaluate effects of the bonding strength of the implant prosthesis luted with resin cement according to storage condition, the groups were divided into 3 : Group A : Stored in waste at $37^{\circ}C$ for 24 hours. Group B : 1000 cycles thermocycled between $5^{\circ}C\;and\;55^{\circ}C$ in water. Group C : Stored in water at $37^{\circ}C$ for 30 days. The results were as follows. 1. Failure was found at gold screw in all specimens of group 1 & 2. 2. The bond strength in group 1 and 2 was 189.86 and 188.14kgf. There was no statistically significant difference between group 1 and 2(P>0.05). 3. The bond strength of group A, B and C was 53.28, 45,86 and 39.29Kgf. There result suggest the advantage of an improved fit of superstructure to the abutment and a simple procedure. But there was a measurable decrease of the bond strength according to storage condition. So, Further research is necessary to evaluate of the implant prosthesis luted with resin cement between gold cylinder and superstructure.

Air Quality Forecasting with the Community Multiscale Air Quality(CMAQ) model

김승범 江原大學校 附設 環境硏究所 2005 環境硏究 Vol.22 No.-

$BCl_3/Cl_2/Ar$ 고밀도 플라즈마에 의한 $(Ba, Sr)TiO_3$ 박막의 식각 메커니즘 연구

김승범,김창일,Kim, Seung-Bum,Kim, Chang-Il 대한전자공학회 2000 電子工學會論文誌-SD (Semiconductor and devices) Vol.37 No.11

(Ba,Sr)$TiO_3$ 박막은 ULSI-DRAM 즉 1-4 Gbit급 DRAM용 셀(cell) 커패시터의 새로운 유전물질로 각광받고 있다. 본 연구에서는 ICP 장비에서 $BCl_3/Cl_2/Ar$ 플라즈마로 (Ba,Sr)$TiO_3$ 박막을 식각하였다. 이때 RF power/dc bias voltage는 600W/-250V, 반응로의 압력은 10mTorr 이었다. $Cl_2/(Cl_2+Ar)$은 0.2로 고정하였고, $BCl_3$ 가스를 첨가하면서 (Ba,Sr)$TiO_3$ 박막을 식각하였다. $BCl_3$ 가스를 10% 첨가하였을 때, $480{\AA}/min$으로 (Ba,Sr)$TiO_3$ 박막은 가장 높은 식각 속도를 나타내었다. $Cl_2/Ar$가스에 $BCl_3$의 첨가 비에 따른 Cl, BCl 및 B의 라디칼 밀도를 optical emission spectroscopy(OES)에 의해 구하였다. $BCl_3$를 10% 첨가하였을 때 Cl의 라디칼 밀도가 가장 높았다. (Ba,Sr)$TiO_3$ 박막의 표면반응을 규명하기 위하여 XPS 분석을 수행한 결과 이온 bombardment 식각이 Ba-O 결합을 파괴하고 Ba와 Cl의 결합형태인 $BaCl_2$을 제거하기 위하여 필요하다. Sr과 Cl의 결합의 양은 많지 않고, Sr은 주로 물리적인 스퍼터링에 의하여 제거된다. Ti와 Cl은 화학적으로 반응하여 $TiCl_4$ 결합형태로 용이하게 제거된다. 식각후 단면사진을 SEM을 통해 본 결과 식각단면이 약 65~70$^{\circ}$ 정도였다. (Ba,Sr)$TiO_3$ thin films have attracted great interest as new dielectric materials of capacitors for ultra-large-scale integrated dynamic random access memories (ULSI-DRAMs) such as 1 Gbit or 4 Gbit. In this study, inductively coupled $BCl_3/Cl_2/Ar$ plasmas was used to etch (Ba,Sr)$TiO_3$ thin films. RF power/dc bias voltage=600 W/-250 V and chamber pressure was 10 mTorr. The $Cl_2/(Cl_2+Ar)$ was fixed at 0.2 the (Ba,Sr)$TiO_3$ thin films were etched adding $BCl_3$. The highest (Ba,Sr)$TiO_3$ etch rate is $480{\AA}/min$ at 10 % $BCl_3$ to $Cl_2/Ar$. The change of Cl, B radical density measured by optical emission spectroscopy(OES) as a function of $BCl_3$ percentage in $Cl_2/Ar$. The highest Cl radical density was shown at the addition of 10% $BCl_3$ to $Cl_2/Ar$. To study on the surface reaction of (Ba, Sr)$TiO_3$ thin films was investigated by XPS analysis. Ion bombardment etching is necessary to break Ba-O bond and to remove $BaCl_2$. There is a little chemical reaction between Sr and Cl, but Sr is removed by physical sputtering. There is a chemical reaction between Ti and Cl, and $TiCl_4$ is removed with ease. The cross-sectional of (Ba,Sr)$TiO_3$ thin film was investigated by scanning electron microscopy (SEM), the etch slope is about 65~70$^{\circ}$.

수근관 증후군에서 적외선 체열 촬영의 진단적 가치

김승범,조용재,구성욱,진동규,조용은,김영수 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.34 No.4

서울시 신청사에 관한 온라인 뉴스 기사의 댓글 분석

김승범 한국문화공간건축학회 2014 한국문화공간건축학회논문집 Vol.- No.48

This study analysed the comments on online news articles about the new Seoul City Hall to examine public discourse on architecture by using network analysis methodology with co-occurrences of words. The analysis reached the conclusions from 3,773 comments on 14 articles that have more than 100 comments from 2006 to 2012. First, the subjects of the comments covered topics about from political, econimic, historical, and design matters with spatial and temporal relation. Second, however, such a diverse subjects didn’t go forward to futher discussion related to the detailed building design, because the public recognized the building not in part but as a whole and the public prefered talking about pragmatic matters rather than spatial matters as well. Last, buildings in the field of discourse, otherwise in the field of production, perform double roles : a building as media which reflects broad social matters and a building as itself.

Tuberculous Lymphadenitis Mimicking Gastric Subepithelial Tumor Diagnosed Using Endoscopic Ultrasound-guided Fine-needle Aspiration

김승범,김태년,김국현 대한상부위장관ㆍ헬리코박터학회 2018 Korean Journal of Helicobacter Upper Gastrointesti Vol.18 No.1

A gastric subepithelial tumor (SET) is commonly detected during a diagnostic endoscopic examination. Gastric tuberculosis (TB), in particular, can present as a SET of the gastric wall. A few cases of gastric TB mimicking a SET have recently been reported. Radiological imaging combined with endoscopic biopsy can aid in the early diagnosis of TB without surgical intervention. A 41-year-old man visited our health promotion center for a regular check-up. Esophagogastroduodenoscopy (EGD) revealed a round and smooth, bulging mucosal lesion suggesting a gastric SET in the upper body of the stomach. Endoscopic ultrasound (EUS) demonstrated a hypoechoic lesion measuring 18 mm, with an obscure layer of origin, and EUS-guided fine-needle aspiration was performed. Microscopic examination of the sample showed chronic granulomatous inflammation. Histopathologically, the aspirated sample showed positive Ziehl-Neelsen staining, confirming a diagnosis of tuberculous lymphadenitis. We describe a case of a patient who presented with tuberculous lymphadenitis mimicking a SET of the stomach. The lesion was found on EGD and confirmed using EUS-guided fine-needle aspiration.

Prevalence and Risk Factors of Gastric and Colorectal Cancer after Cholecystectomy

김승범,김경옥,Tae Nyeum Kim 대한의학회 2020 Journal of Korean medical science Vol.35 No.42

Background: Previous studies on the relationship between gastrointestinal (GI) cancer and cholecystectomy remain inconclusive. We aimed to evaluate this relationship, albeit particularly between cholecystectomy and gastric cancer or colorectal cancer (CRC), and the risk factors of cancer among individuals who have undergone cholecystectomy in Korea. Methods: In total, 4,222 patients who underwent laparoscopic or open cholecystectomy at our institution between January 2006 and December 2013 were included. Patients who underwent cholecystectomy for gallbladder cancer or were undergoing surgery for GI, hepatic, or pancreatobiliary cancers were excluded, as were those who developed stomach cancer or CRC within a year of their cholecystectomy. The included patients were followed until July 20, 2020. The standardized incidence ratio (SIR) was used to calculate the relative risk of GI cancer in cholecystectomy patients. Results: The median patient age (n = 3,588) at the time of cholecystectomy was 54.0 (range, 19–95) years, and the male-to-female ratio was 1:1.04. The median follow-up period after cholecystectomy was 15.0 (range, 0–146) months. We found a 108% greater risk of CRC (SIR, 2.08; 95% confidence interval [CI], 1.28–3.17) and 154% increased risk of CRC in females (SIR, 2.54; 95% CI, 1.16–4.84). Based on multivariate analysis, an age of > 60 years was a significant risk factor for GI cancer in cholecystectomy patients. Conclusion: Cholecystectomy may increase risk of CRC, especially in females. Age was considered a risk factor of GI cancers in patients with history of cholecystectomy.

폐쇄성 황달로 내원한 담관내 증식을 동반한 간세포암 1예

김승범,김태년,이호찬,박재현,은종렬,장병익,이헌주,윤성수,배영경 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

The incidence of hepatocellular carcinoma presenting as obstructive jaundice is 0.7 -9% The mechanisms of obstructive jaundice include bile duct invasion by tumor, tumor thrombi, blood clots, direct bile duct compression by tumor, and intraductal tumor growth. We report a rare case of hepatocellular carcinoma with intraductal growth A 46-year-o1d woman was admitted due to colicky right upper abdominal pain and jaundice for 4 days Computed tomography showed dilatation of the left intrahepatic duct, and endoscopic retrograde cholangiography showed a filhng defect in the left main intrahepatic duct. We performed a left lobectomy with a Roux-en-Y hepaticojejunostomy. The tumor was diagnosed as a hepatocellular carcinoma with intraductal growth.