다수/다차원 격자형데이터를 이용한 해상도 변환의 효율적 방안 연구

김창진,오광백,나영남,Kim, Chang-Jin,Oh, Gwang-Beak,Na, Young-Nam 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.2

In counterfire warfare, it is important to detect and attack enemy targets faster than the enemy using sensing The grided environmental data is usually provided by the numerical simulation coupled with a data assimilation technique and various inter- or extrapolation algorithms, both of which are based on the observation spanning from simple equipments to satellites. In order to employ the gridded environmental data in the M&S system frequently cutting area and changing its resolution, interpolation algorithms such as linear, cubic spline, IDW, and Kriging methods are necessary to apply. These methods, however, require much time in the M&S system. This paper introduces a technic to reduce time to change the resolution of data. using the binary search method, which finds a point to interpolate quickly and interpolate data in the vicinity of. We also show the efficiency of proposed methods by way of measuring the respective elapsed times.

계절에 따른 토양 방선균의 속 다양성 분포

박동진,이상화,박상호,김창진,Park, Dong-Jin,Lee, Sang-Hwa,Park, Sang Ho,Kim, Chang-Jin 한국미생물학회 1998 미생물학회지 Vol.34 No.3

산림, 밭, 초지, 논 토양의 두 깊이(0~2cm, $50{\pm}1cm$)에서 계절별로 채취한 토양 시료로부터 서로 다른 방선균주를 분리, 동정하여 계절별 토양 방선균의 속 다양성을 조사하였다. 토양 표층에 분포하는 Streptomyces속 방선균주의 계절별 변동율은 논(18%)과 산림(18%) 토양에 비해 초지(41%)와 밭(39%) 토양에서 더 높게 나타났으며 $50{\pm}1cm$깊이에서는 논(36%), 밭(28%), 초지(26%), 산림(16%) 토양 순으로 높게 나타났다. 한편 희소 방선균의 계절별 분포 변동율을 토양 표층의 경우 논 토양(26%)을 제외하고는 모두 45%이상이었으나 $50{\pm}1cm$깊이에서는 산림(79%), 논(36%), 밭(24%), 초지(10%) 토양 순으로 높게 나타났다. 따라서, 토양 중에 분포하는 방선균의 속 다양성은 계절 변화에 의지하며 또한 이는 방선균군의 종류, 토양의 유형, 그리고 토양 깊이에 의해서 영향을 받을 것으로 고려된다. From soils seasonally collected at two depths (0~2 cm, $50{\pm}1cm$) of forest, field, grass land, or paddy field, distinct strains of actinomycetes were isolated and identified to the genus level. The genus-diversity of soil actinomycetes was revealed to be considerably different by seasonal change. It was also affected by soil depths, soil types, or actinomycete groups. At the soil depth of 0~2 cm, the seasonal distribution fluctuation (%) of streptomycete strains was higher in grass land (41%), field (39%) soil than paddy field (18%), or forest (18%), whereas that of streptomycete strains at the soil depth of $50{\pm}1cm$ was high in order of paddy field (36%), field (28%), grass land (26%), and forest (16%). On the other hand, the seasonal distribution fluctuation ratio of rare actinomycete strains at the soil depth of 0~2 cm was above 45% except for paddy field (26%). At the soil depth of $50{\pm}1cm$, the seasonal distribution of rare actinomycete strains exhibited high fluctuation (%) in order of forest (79%), paddy field (36%), field (24%), and grass land (10%).

두개인두종의 감마나이프 치료 후 장기 추적 결과

김윤석,이도희,라동숙,전영일,안재성,전상룡,김정훈,노성우,나영신,김창진,권양,임승철,이정교,권병덕,Kim, Yun Sok,Lee, Do Heui,Ra, Dong Suk,Chun, Young Il,Ahn, Jae Sung,Jeon, Sang Ryong,Kim, Jeong Hoon,Roh, Sung Woo,Ra, Young Shin,Kim, Chang Jin 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.2

Objectives : The optimal treatment of craniopharyngioma is controversial. Despite recent advances in microsurgical management, complete surgical removal of craniopharyngioma remains very difficult. Radiation added to surgery is effective, but radiation therapy resulted in untoward side effect in young patient. Gamma knife radiosurgery offers the theoretical advantage of a reduced radiation dose to surrounding structures during the treatment of residual or recurrent craniopharyngioma compared with fractionated radiotheraphy. We described retrospective analysis of tumor size and clinical symptoms of patients after gamma knife radiosurgery in residual or recurrent craniopharyngioma were performed. Material and Methods : From September 1990 to January 2000, 18 patients of craniopharyngioma were treated by gamma knife radiosurgery. All patient had undergone surgery, but residual or recurrent tumor was found and all of them treated postoperative gamma knife radiosurgery. The mean age was 19(from 6 to 66) and male to female ratio was 10 to 8 and 8 patients were below 15 years old. In young age group(below age 15), the average volume of the tumor was $2904.8mm^3$ and mean maximal gamma knife dose was 34.9Gy. In old age group(older than 15), the average volume of the tumor was $2590.4mm^3$ and mean maximal gamma knife dose was 45.2Gy. The size of the tumor was average $2730.1mm^3$($88-12000mm^3$), mean average radiation dose was 40.7Gy and the mean prescription dose was 17.6 Gy(4-35Gy) delivered to a median prescription 50.7% isodose. Results : The follow up was from 1 year to 9 years(mean 59.1 months) after gamma knife radiosurgery. The tumor was controlled in 13(72.2%) patients. The tumor decreased in 9 patients and not changed in 4 patients. The tumor size increased in 4(22.2%) patients during follow up period. In two cases the tumor size increased because of its cystic portion was increased, but their solid portion of the tumor was not changed. In another two patients, the solid portion of the tumor was increased. So, one patient underwent reoperation and the other patient underwent operation and repeated gamma knife radiosurgery. The tumor recurred in one case(5.6%) that is a outside of irradiated site. The presenting symptoms were improved in 4 patients(improved visual acuity in 1, controlled increased intracranial presure sign in 3 patients). In one case, visual acuity decreased after gamma knife radiosurgery. The endocrine symptoms were not influenced by gamma knife radiosurgery. Conclusion : Craniopharyngioma can be treated successfully by gamma knife radiosurgery. Causes of the tumor regrowth are inadequate dose planning because of postoperatively poor margination of the tumor, close approximation of optic nerve and residual tumors outside the target lesion. Recurrence can develop 4 years after gamma knife radiosurgery. Volume is important, but the accurate targeting is more important to prevent tumor recurrence. If the tumor definition is not clear during planning gamma knife surgery, long-term image follow up is required.

커피소비 동향 및 다양한 드립커피 추출기술

김창진,최근표,Kim, Chang Jin,Choi, Kun Pyo 한국식품영양과학회 2014 식품산업과 영양 Vol.19 No.2

대두품종(大豆品種)과 선발(選拔) Rhizobium japonicum간의 숙주(宿主) 친화성(親和性)

김창진,이윤,김성훈,유익동,민태익,Kim, Chang-Jin,Rhee, Yoon,Kim, Sung-Hoon,Yoo, Ick-Dong,Mheen, Tae-Ick 한국토양비료학회 1986 한국토양비료학회지 Vol.19 No.4

우수(優秀) 대두접종제(大豆接種劑)로 이용할 균주(菌株)의 선발을 목적으로 국내(國內)에서 선발한 R. japonicum 균주(菌株)들과 현재 대두장려품종으로 보급되고 있는 대두품종들과의 상호(相互) 접종실험(接種實驗)을 통하여 숙주친화성(宿主親和性) 정도를 조사하였다. 얻어진 결과는 다음과 같다. 1. 공시(供試) 근류균주별(根瘤菌株別) 대두품종(大豆品種)과의 친화성(親和性) 정도를 보면 R. japonicum R-214, R-138 균주(菌株)가 근류형성능(根瘤形成能), 질소고정활성(窒素固定活性) 및 총(總) 질소흡수량(窒素吸收量)도 높아 대두품종(大豆品種)과 친화성(親和性) 범위가 비교적 넓었으며 R. japoncum R-224 균주(菌株)는 아주 낮은 것으로 판단되었다. 2. 대두품종별(大豆品種別) 근류균(根瘤菌)과의 친화성(親和性)은 황금(黃金)콩, 장백(長白)콩 등이 높았으며 그 다음이 장엽(長葉)콩, 단엽(短葉)콩, 백운(白雲)콩, 동북태(東北太) 등의 순이었고 방사(放射)콩이 제일 낮았다. 3. 일반적으로 질소고정활성(窒素固定活性)이 우수(優秀)한 균주(菌株)가 열등한 균주(菌株)보다 숙주친화성(宿主親和性) 범위가 넓은 것으로 판단되었다. In order to select suitable strains for utilization as soybean inoculants, the affinity between Rhizobium japonicum strains isolated from the domestic field and the several soybean varieties being distributed as recommended species was investigated by cross-inoculation experiments. The results obtained are as follows: 1. Rhizobium japonicum R-214 and R-138 showed broad affinity range to varies soybean species in terms of the nodule forming ability, the nitrogen fixing activity and the amount of total nitrogen absorption. In contrast, Rhizobium japonicum R-224 showed very low affinity to the same soybean groups. 2. The affinity of Hwang-Keum Kong and Jang-Paeck Kong to the rhizobium strains was the most signigicant, and that of Jang-Yeop Kong, Dong-Buk Tae, Paeck-Woon Kong and Dan-Yeop Kong was also significant. On the other hand, Pang-Sa Kong showed low affinity to the strains. 3. In general, the strains having high nitrogen-fixing activity seemed to possess the broad affinity range to the soybean hosts.

Sporocytophaga congregata에 의(依)한 Cellulase 생산(生産) 및 그 효소특성(酵素特性)과 효모(酵母)와의 혼합배양(混合培養)

김창진,김상순,이계호,Kim, Chang-Jin,Kim, Sang-Soon,Lee, Ke-Ho 한국응용생명화학회 1986 Applied Biological Chemistry (Appl Biol Chem) Vol.29 No.1

In order to produce cellulosic single cell protein from the cellulose, 163 strains of cellulose assimilating bacteria were isolated from 95 sources and one of them was screened by its strong cellulose assimilating activity. and was identified as Sporocytophaga congregate A-7. The optimum temperature and pH for cellulase production were $30^{\circ}C$ and 6.0, and the optimum temperature, pH and heat stability of the enzyme were $50^{\circ}C$, 7.0 and below $55^{\circ}C$. When the bacteria was cultured in fermentor, the specific growth rate was $0.034hr^{-1}$ and when the bacteria was mixed cultured with Candida guilliermondii var. guilliermondii, the specific growth rate of the bacteria and yeast were $0.06hr^{-1}$ and $0.08hr^{-1}$ respectively and total cell dry weight was $4{\sim}5g/l$. 섬유소로부터 섬유소이용성 단세포단백질을 생산(生産)하기 위하여 전국에서 수집한 95점의 시료(試料)로부터 163주(株)의 섬유소자화세균(資化細菌)을 분리하고 이들 중 섬유소자화력(資化力)이 강한 1주(株)를 선정(選定)하고 Sporocytophaga congregata A-7으로 동정(同定)하였다. 최적 균생산(菌生産) 및 효소생산의 조건은 온도 $30^{\circ}C$, 초기 pH 6.0이었으며 효소반응의 최적조건은 온도 $50^{\circ}C$, pH 7.0이었고 효소의 열안정성은 $55^{\circ}C$이었다. 선발된 섬유소자화세균(資化細菌)과의 결합배양(結合培養)에 적합한 효모로는 Candida guilliermondii var. guilliermondii가 선정(選定)되었으며 혼합배양시(混合培養時) specific growth rate는 효모의 경우 $0.08hr^{-1}$이고 세균(細菌)의 경우는 $0.063hr^{-1}$로서 세균(細菌) 단독배양시의 $0.034hr^{-1}$에 비해 2배로 증가하였으며 48시간 배양후의 균체조건량은 약 $4{\sim}5g/l$ 정도이었다.

수상함 전투체계 육상시험체계용 개체생성기 구현에 적합한 병렬처리기법에 관한 연구

김창진,오광백,정용환,Kim, Chang-Jin,Oh, Gwang-Baek,Jung, Young-Hwan 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.5

Object Generator is a software to provide simulation object data(aircraft, ship, submarine, missile, torpedo) for sumulators in LBTS(Land Based Test System). but there is a burden to the system, because Object generator needs to send many object's data, display objects in a tactical screen, show object's information in a list in 1 second. This paper suggests a parallel software structure taking a few factors(deadlock, dependency) into consideration. At last, the paper shows the performance of the parallel structure's software compared with the former structure's software.

보험요율 자유화와 재보험 시장변화

김창진,Kim, Chang-Jin 한국화재보험협회 1996 防災와 保險 Vol.70 No.-

Diazepam이 랫드 태아의 발육에 미치는 영향

김창진,김용준,유일정,Kim, Chang-jin,Kim, Yong-jun,Yu, Il-jeoung 대한수의학회 1999 大韓獸醫學會誌 Vol.39 No.6

To investigate the effect of diazepam on fetal development in pregnant rats, this experiment was performed in eighty Sprague-Dawley female rats which were 8 weeks old and grouped into two according to different diazepam treatment period during 5-9 days of gestation and 10-14 days of gestation. Both experimental groups were included by saline treated groups (control) and diazepam-treated groups (6mg, 12mg and 24mg), respectively. Diazepam was injected to pregnant rats subcutaneously, which were sacrified on 20 days of gestation and mean litter size, fetal body weight, fetal crown-rump length (CRL) and pathological findings were examined. 1. Concerning mean litter size, diazepam-treated groups showed lower mean litter size than control in both 5-9 days and 10-14 days of gestation groups(p < 0.05) without difference according to dosage of diazepam and day of gestation. 2. Concerning fetal body weight, diazepam-treated groups during 5-9 days of gestation showed lower fetal body weight than control and the other treated group during 10-14 days(p < 0.01) without difference according to dosage of diazepam. Diazepam-treated group during 10-14 days of gestation showed no difference among experimented groups. 3. Concerning fetal crown-rump length (CRL), diazepam-treated groups during 5-9 days of gestation showed shorter CRL than control and the other treated group during 10-14 days of gestation(p < 0.01) without difference according to dosage of diazepam. 4. Reduction of mean litter size, fetal body weight and CRL was shown from when treated by the dosage of 6mg/kg of diazepam. 5. Maternal mortality according to dosage of the 20mg/kg of diazepam were 30% and 20% in the treated group during 5-9 days and 10-14 days of gestation, respectively. These results indicated that diazepam treatment in pregnant rats caused considerable reduction of mean litter size, fetal body weight and fetal crown-rump length when treated during 5-9 days of gestation.

정형성 기반 국방 안전/보안필수 소프트웨어 개발 및 인증 기준 - 안전/보안필수 소프트웨어 인증 프로세스에 대한 정형기법 적용 방안 연구 -

김창진,최진영,Kim, Chang-Jin,Choi, Jin-Young 한국군사과학기술학회 2007 한국군사과학기술학회지 Vol.10 No.1

The paper provides the approach to apply formal methods to the development and certification criteria of defense safety/security-critical software. RTCA/DO-178B is recognized as a do facto international standard for airworthiness certification but lack of concrete activities and vagueness of verification/certification criteria have been criticized. In the case of MoD Def Stan 00-55, the guidelines based on formal methods are concrete enough and structured for the defense safety-related software. Also Common Criteria Evaluation Assurance Level includes the strict requirements of formal methods for the certification of high-level security software. By analyzing the problems of DO-178B and comparing it with MoD Def Stan 00-55 and Common Criteria, we identity the important issues In safety and security space. And considering the identified issues, we carry out merging of DO-178B and CC EAL7 on the basis of formal methods. Also the actual case studies for formal methods applications are shown with respect to the verification and reuse of software components.