P 기업의 재고관리시스템 구축사례

안봉근,김중순,손달호 한국경영과학회 2003 經營 科學 Vol.20 No.1

Supply-Chain Management (SCM) was the integration of the activities that procure materials, transform them into intermediate goods and final products, and deliver them to customers. These activities include the traditional purchasing function, plus other activities that were important to the relationship with suppliers and distributers. P company was the first vendor in motor industry of Korea and had a flexible relationship with motor industry through SCM. However, P company had independent information with motor industry and it caused many troubles in the operation of the P company. Considering these facts, authors had developed the inventory control system which was the part of doer-fulfillment process and could make a progress in the operation of the inventory. The core factor of the developed inventory control system was the combination of the theoretical factors and the empirical factors. That is, the factors which were excluded in existing inventory theory revealed to be important.

타액 조건에 따른 치과용 니켈-티타늄 합금의 부식 특성

김영근,이중배,최기열 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.1

접합면의 차이에 따른 두개골 외판의 생존

박성근,송중원,한기환,강진성,박관규 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.3

Onlay graft of the calvarial bone has been popularized in craniofacial surgery because absorption of the calvarial bone is less than that of the endochondral bone. But the problems with using the calvarial bone are its rigidity and difficulty in setting a precise apposition. When the outer tables of the calvarial bone are used for augmentation and reconstruction of the convex zygoma, forehead, or chin, it is better to place the cancellous surface over the convex recipient bone to get a precise apposition. Whereas, it is better to place the cortical surface over the concave nose or orbital cavity to achieve a good apposition. Therfore, our study was designed to determine the differences of bone absorption and regeneration between cancellous and cortial bone contact to facial bone, and between preserved periosteum and detached periosteum in autograft of calvarial bone in dog models. Outer tables of the calvarial bone were placed in subperiosteal pockets of the upper and lower maxilla in four different ways : Group I ; The cancellous surface was placed in contact with the bare recipient bone, and the cortical surface attached with periosteum was accordingly contacted with the elevated periosteum of the recipient bone. Group Ⅱ ; The corical surface attached with periosteum was placed in contact with the bare recipient bone and the cancellous surface was contacted with the elevated periosteum of the recipient bone, Group Ⅲ ; The arrangenent was similar to Group Ⅰ except that the periosteum of the graft was deprived. Group Ⅳ ; The arrangement was similar to Group Ⅱ except that the periosteum of the graft was deprived. Volume measurements using a caliper technique and histological study were made 20 weeks postoperatively. The volume of maintenance is as follows ; Group Ⅰ, 84.2% ; Group Ⅱ, 77.6% ; Group Ⅲ, 77.0%, and Group Ⅳ, 69.5%. The histolgical contribution of living bone was assessed by a modified point counting technique : Group Ⅰ, 86.6%, Group Ⅱ, 83.8% ; Group Ⅲ, 79.6% and Group Ⅳ, 77.6%. Greater volume maintenance and histological contribution of living bone were found when cancelllous surface rather that the cortical were placed in contact with the recipient bone and the grafts from their periosteum were preserved. We concluded that in order to expect better survival of a grafted bone, the cancellous surface of the graft should contact with the recipient bone and that the periosteum of the graft should be preserved.

배양 내피세포에 감염시킨 Vibrio vulnificus 균의 전자현미경적 연구

최중근,고광균 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.1

To elucidate the pathogenesis of hematogenous V. vulnificus infection in fulminant Vibrio septicemia, V. vulnificus was inoculated in cultured human endothelial cells. Endothelial cells were prepared from the umbilical vein that was freshly isolated from human umbilical cord. The ultrastructural change demonstrated a sequence of steps which occurred with V. vulnificus invasion of the cultured human endothelial cells and the results were follows. 1. The cytopathic effect was appeared at the initial attachment stage of V. vulnificus infection. The characteristic of cytopathic effect were the formation of severe vacuolization and cell lysis. 2. The present study demonstrates that the reason of destruction of endothelial cell was caused by the production of toxic products than the growth of V. vulnificus.

전두사골 수막뇌류 및 Saethre-Chotzen증후군에 의한 안와격리증의 치험

송중원,한기환,박성근,강진성 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.2

본 교실에서는 전두사골 수막뇌류에 의한 안와격리증 2례는 두개내 접근으로 수막뇌류 절제술을 실시함과 동시에 두 개외 접근으로 안와내벽 및 외벽 절골술로써 교정하였으며 Saethre-Chotzen 후군에 의한 1례는 두개골 성형술과 U형 절골술로 교정하여 비교적 만족할 만한 결과를 얻을 수 있었기에 보고하는 바이다. The authors experienced two cases of mild hypertelorism with frontoethmoidal meningoencephalocele and one with Saethre-Chotzen syndrome. The first and second cases, which had nasofrontal and nasoethmoidal meningoencephalocele respectively, were corrected by resection of the meningoencephalocele, repair of the dura, and calvarial bone graft intracranially, and combined medial and lateral orbital wall osteotomy with augmentation rhinoplasty with calvarial bone grafts extracranially. To stabilize the orbital contents medially, a split osteotomy of the lateral orbital wall and interpositional bone graft were done in order to avoid step deformity of the lateral orbital rim. The third case, Saethre-Chotzen syndrome characterized brachycephaly, hypertelorism, ptosis of the eye lid, maxillary hypoplasia, lower set frontral hair line, and partial cutaneous syndactyly was corrected by a Modified Marchac technique for remodelling the forehead and a subcranial U-osteotomy for mild hypertelorism. Maxillary hypoplasia was corrected effectively by advancement on the medial portion of the U-shaped bony segment. Augmentaton rhinoplasty with calvarial bone graft and chip bone grafts on the anterior nasal spine was done simultaneously. A large amount of nasal bone grafts in two cases were absorbed, and then augmentation rhinoplasty using silicone implant was performed after 6 months, 12 months respectively. In mild hypertelorism with associated deformity, a extranial osteotomy with augmentation rhinoplasty and correction of associated deformities can offer good aesthetic results.

몰리브덴 퍼어말로이의 자기저항 효과에 관한 연구

장충근,유중렬,송재용,윤만영,박재형,손대락 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

자기저항센서를 제작하기 위하여 Mo-permalloy(Ni:79.43%, Fe:14.47%, Mo:5.7%, Mn:0.38%, C:0.013%)를 슬라이드 그라스에 진공증착하여 sensor element를 제작한 후 포화자속밀도(B_(s)), 보자력(H_(c)), 자기이방성상수(K//), 자기저항변화율(ΔR/R)을 조사하였다. 진공증착된 permalloy 박막의 포화자속밀도는 0.746T 이었으며, 자화주파수 1kHz에서 보자력은 2.90A/cm(//),1.98A/cm(⊥) 이었고, 열처리 후에 1.79A/cm(//). 1.37A/cm(⊥)로 감소되었다. 한편 이 소자의 자기이방성상수는 1.38X10^(4)erg/cm^(3) 이었으며 5x1^(0-3)T의 자장변화에 대만 저항변화율(ΔR/R)은 2.0% 이었다. 앞으로 이 소자의 온도특성, 잡음특성 및 내열성 등을 조사하고자 한다. To fabricate magnetoresistive sensor, Mo-permalloy(Ni:79.43%, Fe:14.47%, Mo:5.7%, Mn:0.38%, C:0.013%) was evaporated on the slide glass. Saturation magnetic induction(B_(s)), coercive field strength(H_(a)), magnetic anisotropy constant(K), and magnetoresistance were measured for the fabricated samples. The evaporated samples show that saturation magnetic induction was 0.746T, and coercive field strengthes were 2,90A/cm(//) and 1.98A/cm(⊥), and this values were reduced to 1.79A/cm(//) and 1.37A/cm(⊥) respectively after annealing. For the measurement of coercive field strength, magnetizing frequency of 1kHz was used. For the fabricated sensor element, magnetic anisotropic constant was 1.38X10^(4)erg/cm^(3) and magneto-resistance change(ΔR/R) was 2.0% under the magnetic field change of 5X10^(-3)T, We will continue study on the characteristics for the temperature, heat resistance, and noise.

동적계획모형을 이용한 근무형태 결정

김중순,안봉근,손달호 한국경영과학회 2003 經營 科學 Vol.20 No.2

In this paper, we applied dynamic programming to determining work schedule type. In dynamic programming formulation. each day during a planning horizon represents a stage for which a decision Is made. The alternatives are given by work schedule types that combine regular time, overtime. additional shift, and so on. In this case, their associated return function is labor cost. The state is defined as the amount of work time allocated to stage 1, stage 2, …, and current stage. A case study for a real manufacturing company was performed to apply dynamic programming to scheduling daily work hours during a week. The case study showed that total cost of our solution derived from dynamic programming decreased by about 6% as compared with the solution obtained from the previous method.

진공차단기용 영구자석형 엑추에이터 최적설계

김한균,김중경,이정근,한성진 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

The vacuum interrupter operated by permanent magnet actuator(PMA) gives outlook on improved characteristic, higher reliability and cost price reduction as well as the feature of simple structure and few component. For the anlysis and design of permanent magnetic actuator, not only electric, magnetic and mechanical phenomena but also material properties should be taken into account. Aim of the present paper is modeling of permanent magnet actuator(PMA) used in medium voltage distribution systems and remodeling by permanent magnetic. Coupled finite element method is used to analysis the modeling and we compared with previous PMA model and improved PMA model.

차량용 Printed On-Glass 안테나에 관한 연구

박상명,이중근 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1

본 논문에서는 차량 뒷 유리와 열선과 유사하게 차 유리 표면에 패턴으로 실장 되어 사용 될 수 있는 Printed On-Glass 안테나의 특성을 해석 하였다. 먼저 도체 판을 동일한 크기의 세그먼트로 분할하고, 각각에 전류와 전하의 기저 함수를 가정 한 후 모멘트 법(Moment Method)을 사용하여 도체 판에 대한 산란 문제를 해석하였다. 또한 동일한 알고리즘을 Printed On-Glass 안테나 해석에 적용하였으며, 연산의 수를 줄이기 위해 안테나 요소(Element)를 세그먼트로 분할할 때 안테나 구조를 고려하여 각 세그먼트의 크기를 달리하여 해석하였다. 시뮬레이션 된 안테나 패턴상의 전류 분포로부터 안테나 임피던스와 복사 패턴을 계산하였으며, 시뮬레이션과 실제 측정치를 비교한 결과 서로 유사함을 알 수 있었다. The objective of this paper is in the analysis and simulation of the characteristics of an automobile printed On-Glass antenna. With numerical methods (Moment Method), scattering problems on a finite flat conducting plate are analyzed by segmentation of the conducting plates, and assumed a current and charge basis function for each segment. Then these algorithms are applied to a printed On-Glass antenna problem. Segment sizes were adaptively chosen to save the calculation times. From the simulated current distribution on antenna patterns, antenna impedances are calculated, and radiation patterns are simulated. Then these are compared with the measured values, which turned out to be similar to each other.

삼차신경 감각핵의 세포활성도와 Substance P 유리에 대한 Capsaicin, Paradol 및 Shogaol의 전통작용기전에 관한 연구 : Ⅰ. 유해자극에 의한 개구반사와 삼차신경 척수감각핵의 Substance P에 미치는 영향 Ⅰ. EFFECTS ON JAW OPENING REFLEX BY NOXIOUS STIMULUS AND RELEASE OF SUBSTANCE P

이종흔,김중수,송형근,박수정,함진숙 대한구강생물학회 1990 International Journal of Oral Biology Vol.14 No.1

The purpose of this investigation was to determine the relative analgesic effectiveness of paradol and shogaol compared with capsaicin, and effects of capsaicinoids on substance P of trigeminal spinal sensory nucleus. Under anesthesia, anterior belly of digastric muscle was exposed and a pair of electrodes was inserted to record the electromyograms. Noxious electrical stimulus was applied to oral mucosa around the mental foramen. Inferior alveolar nerves (IAN) and saphenous nerves were carefully exposed for application of vehicle and drugs to evaluate the effects on digastric EMG (dEMG) and neural conduction, and caudal part of brainstem was exposed to determine the substance P. Vehicle and 1.5% of capsaicin, paradol and shogaol were applied to IAN and saphenous nerves for 30 minutes, respectively. EMG_s of digastric muscle evoked by noxious electrical stimulus were recorded before application of drugs or vehicle, immediately after removal and washing of drugs and at 30 minutes after washing. To examine the effects of the peripheral stimulation on the action potential, stimulating electrodes were placed on the peripheral side of drugs application site and recording electrodes were on the proximal side. Substance P of trigeminal spinal sensory nucleus was collected by push-pull perfusion technique and determined by radioimmunoassay. Capsaicin application on IAN could not influence on dEMG, but paradol and shogaol decrease the amplitude of dEMG. Capsaicin applied locally to nerve decreased amplitude and conduction velocity of only C-fiber, while paradol and shogaol inhibited the neural conduction of C-fiber and Aδ-fiber. Substance P in the trigeminal spinal nucleus was reduced by capsaicin but not by paradol and shogaol.