대장암 주변에서 관찰되는 백색반점의 병리조직학적 특성과 임상적 의의

김효종,조진만,장린,동석호,김윤화,장영운,박일랑,김병호,이정일 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4

Background/Aims: To investigate the difference between colorectal adenocarcinomas with white spots (foamy cells) and those without white spots, clinically and histopathologically, were examined 37 cases of colorectal adenocarcinomas were classified in this study. Methods: Two groups: those with white spots and those without. In each case, evidence of lymph node and liver metastasis was sought. Immunoreactive staining for macrophage was performed. Results: Increased incidence of exophytic tumors was found (73%, p=0.028) in the group with white spots. The incidences of lymph node metastasis were 33% vs. 45% between the group with white spots and the group of without, but the difference was not statistically significant. Conclusions: These results suggested that foamy cells might have a beneficial role in colorectal cancer, although they were not statistically significant. Therefore, further prospective study be warranted.

8년간(1992~1999) 산업안전보건연구원에 의뢰된 직업병 심의 사례 분석

강성규,김규상,김양호,최정근,안연순,진영우,최병순,양정선,김은아,채창호,최용휴,김대성,박정선,정호근 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Objectives : Pneumoconisis and noise-induced hearing loss (NIHL) have been reported as main occupational diseases by the Special Health Examination. The Industrial Accident Compensation Insurance has reported various work-related diseases, however, these two diseases occupied almost a half of compensated cases. Therefore, it was not well known about the status of occupational diseases other than pneumoconiosis, NIHL, and cardio-cerebrovascular accident (CVA). This study was conducted to analyze claimed cases as an occupational disease, that was requested to the Korea Industrial Safety and Health Agency (KOSHA). Methods : The local office of the Korea Labor Welfare Corporation (KLWC) has asked the KOSHA for confirmation of claimed cases as an occupational disease. We analyzed 379 cases requested from KLWC, the Ministry of Labor, employers, unions and occupational health agencies from 1992 to 1999. Results : Male was 80.7 % of the requested cases. Their mean age was 42 years old and 75.5 % of them were more than 35 years old. The requested cases were increased rapidly from 25 cases in 1992 to 108 cases in 1999 and the accept rate was 50.7 %. The majority of requested cases were respiratory diseases(22.4%), cancers(18.5%), Neuropsychiatric problems(14.5%), and musculoskeletal problems(13.5%). The accept rate was high in reproductive, respiratory, musculoskeletal and digestive disorders and low in neuropsychiatric, renal and otologic problems and occupational cancers. 73.6% of them were caused by chemical agents, especially 28.5 % were by organic solvents. 67% of them were clinically confirmed at university hospitals. A half of the cases were from KyongIn area, even the request came from the whole country. Conclusions : A claim was common in workers whose age was over 35 years old and exposure history was over 10 years. The respiratory diseases and neuropsychiatric disorders were still main problems in occupational health and occupational cancers was increasing even though its accept rate was not high yet.

로타담모델(Rotterdam Model)의 이론적 고찰

김병호 建國大學校 自然科學硏究所 2002 建國自然科學硏究誌 Vol.13 No.2

This paper is primarily concerned with a theoretical development and empirical merits of the Rotterdam model which is one of the major complete systems of consumer demand functions. Particularly this paper reviews constraints on the Rotterdam model, derived from theoretical considerations which are used to deal with the problems of lack of sufficient data. Thus this paper could contribute to right estimation and good explanation for the commodity demand analysis in empirical work. Two kinds of Roterdam models ar followed as; Rotterdam model in absolute prices; W_idlnq_i=??S_ijdlnP_j+β_i(dlnY-??W_jdlnP_j) Rotterdam model in relative prices; W_idlnq_i=??δ_ij(dlnP_j-??β_kdlnP_k)+β_i(dlnY-??W_jdlnP_j)

偶然과 確率의 槪念形成을 위한 單元學習資料 開發 硏究

金楨化,崔友錫,朴秉昊 晋州敎育大學校 科學敎育硏究所 1976 科學敎育硏究 Vol.2 No.-

Piaget and Inhelder figured in several Modules of the experimental results that the idea of Chance and Probaiblities was developed into the three stage graduatly. From seven or eight to eleven or twelve years of age, a second period is characterized by the construction of operative grouping of a logical order in primary school children. In this study the development of a Modules concerned with conception of Chance and Probababilities was compared the notion formation by school year, and difference degree between regional notion formation, relationship between examination results in science, relationship between basic concept formations. The sample population was 353 students of B primary school located in urban region, Jinju, 291 students of O primary school in farm region, Jin-yang County, and 304 students of N primary school in fishing region, Ha-Dong County from the first grade to the sixth grade. The selection of these samples occured of assigning ramdomized number to all students of population. Children were interviewed individual using tasks developed to reflect the Modules. The interview instruments were used differently by the grade to concept formation after the lesson. Answers acquired through interview tasks for formation or unformation were as follows: A+, A, A-, …average A (sufficieney: Formation) B+, B, B-, …average B (common: Transitivity) C+, C, C-, …average C (insufficiency: Unformation) The results acguired through analysis of data were as follows: 1) The concept formation level of Chance and Probabilities by the developed Modules tends to become half differs from the earlier finding of Piaget and Inhelder, beacause the interview instruments used that in this study differs from Inhelder and Piagetian materials. 2) The difference degrees between regional groups in the concpt formation level of Chance and Probabilities were as follows: _______________________________________________________________________ regional group/Answer(%) A(formation) B(transitivity) C(unformation) _______________________________________________________________________ Urban 54.74 29.77 15.99 Farm 28.03 34.52 37.45 Fishing 30.22 33.93 35.85 Average 37.66 32.57 29.76 _______________________________________________________________________ A comparision of the concept formation level in regional group showed that the cognitive development received higher in the urban school, but lower in the farm and fishing school. 3) The interrelationhip between examination results in science and the concept formation level of Chance and Probabilities has no relation in low grades (1, 2, 3 grade) grades, but favored the relation in high grades (4, 5, 6 grade)by using a Modules of Chance and Probabilities. 4) The interrelationship between basic concept formation and the concept formation of Chance and Probabilities showed that manipulative modules interacted to each child for each lesson, and who knows no law can know no lawlessness.

급속응고된 N-type Bi₂Te_(2.75)Se_(0.15) 열전재료의 미세조직과 열전특성에 미치는 압출비의 영향

김태경,이상일,임종호,손현택,김택수,천병선 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.1

The n-Type thermoelectric compounds of Bi₂Te_(2.75)Se_(0.15) doped with 0.1 wt% SbI₃ were fabricated by gas atomization process and extruded under ratio of 16:1 and 28:1 at 450℃. The effect of extrusion ratio on the microstructures and thermoelectric properties were investigated by a combination of microscopy, XRD and thermoelectric properties. Grains of extruded bars are smaller than those of heated powder at extrusion temperature (450℃) due to the dynamic recrystallization but with increasing the amount of plastic deformation, grains of specimen extruded with 28:1 were slightly coarse. The compressive strength of hot extruded bar under 28:1 is 160 MPa and with decreasing the extrusion ratio to 16:1, the value is 250 MPa. The Seebeck coefficient a and electrical resistivity p were decreased with increasing ratio, while thermal conductivity x was increased. this results from decrease of carrier scattering and increase of carrier mobility. Extruded bar under ratio of 16:1 shows the higher value of figure of merit (Z=2.50x10^(-3)/K) than that of 28:1 (Z=2.07x10^(-3)/K). (Received June 24, 2004)

우유 및 유제품의 수요체계 분석

김병호 건국대학교 1995 學術誌 Vol.39 No.1

The milk and its related consumption in Korea has sharply increased as well as other meat products. The total milk cow size was approximately 495,000 in 1991. To keep this milk production profitably we need understand the consumption structure of fluid milk and milk products. Addording to the results of analysis, the consumption of the milk and milk products are increased in all seasons except white fluid milk. The consumption on fluid milk, however, has strong trend to increase and the consumption of white fluid milk is very sensitvie in income. The income elasticity of white fluid milk was 1.09 and is and its price elasticity is -1.43. This implies we can expect stronger increase in its consumption as the personal income in increased. Additionally income elasticities of whole milk is 4.25, 4.08 in fatless milk, 1.73 in butter, 1.20 in cheese. The price elasticity of most milk products was very elastic;-4,17 in whole milk, -3.63 in fatless milk, -2.37 in concentrated milk, and -3.60 in cheese. The big difference in price and income elasticites of the milk products implies that there are many related goods between products, i.e., there could be some complementary goods in concentrated milk and cheese because fo their negative difference in price and income elasticites. But there could be strong substitute goods in the processed milk, fatless milk and butter becasue of their big difference in related elasticities. Currently 259ercentage of the raw milk used far the processed milk products. The usage of the raw milk for the processed milk products is lit ell to increase strongly due to the income increase and consumer's taste change toward the processed milk. Therefore, for the stable consumption for the milk products, policy marers have to pay attention on the raw milk pricing and furthermore shouyld consider difference pricing for the milk products.

W치환 2205 이상 스테인리스강의 크리프 특성 평가에 관한 연구

김기엽,최병호,남기우,안용식 한국비파괴검사학회 2004 한국비파괴검사학회지 Vol.24 No.1

22Cr-5Ni 2상 스테인리스강의 합금원소 중 몰리브덴(Mo) 원소를 텅스텐(W)으로 치환하여 크리프거동에 미치는 영향을 조사하였다. 크리프시험은 600℃와 650℃의 온도에서 실시하였다. 650℃ 크리프 시에는 취약한 금속간화합물인 σ상이 석출하였으며 이것은 크리프수명을 급격히 감소시키는 역할을 하였다. Mo에 대한 W원소의 치환은 일반적으로 σ상의 석출을 지연시킨다고 알려져 있으나, 2wt.%까지 W 치환을 실시한 본 연구범위에서는 크리프 수명 및 최소 크리프속도에 뚜렷한 영향을 미치지 못하였다. 크리프손상의 정도를 평가하기 위하여 크리프시편에 대한 초음파검사를 실시하였다. 크리프온도 600℃에서는 크리프시편의 수명이 증가함에 따라 음속이 비례적으로 증가하였으나 650℃에서는 반대로 감소하였다. The effect of the substitution of Tungsten(W) for Molybdenum(Mo) on the creep behaviour of 22Cr-5Ni duplex stainless steel(DSS) has been investigated. Creep tests were carried out at 600℃ and 650℃. Intermetallic σ phase is precipitated during creep at 650℃, at which creep rupture time was much lower compared with at 600℃. The substitution of W for MO in the duplex stainless steel was known to retard the formation of σ phase. Minimum creep rate and creep rupture time, however, were hardly influenced by the substitution of 2wt.% W. An ultrasonic measurement for the creep specimens has been carried out for the evaluation of creep damage. The sound velocity increases propotionally with the increase of creep rupture time at 600℃ of creep temperature. On the contrary, the sound velocity decreases with the increase of rupture time at 650℃, which can be correlated with the microstructural evolution during creep.

LES와 AIDS를 중심으로 한 食品需要模型硏究

金柄鎬 建國大學校 附設 自然科學硏究所 1992 建國自然科學硏究誌 Vol.3 No.-

철근 이음형 PC 보-기둥 내부 접합부의 구조적 거동에 관한 실험적 연구

김승훈,하상수,문정호,이리형,이강철,전병갑 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

In this study, new moment-resisting precast concrete beam-column joint is proposed for moderate seismic regions. It has the connection reinforcing bars, penetrated the joint and lap-spliced with the bottom bars of precast U-beam. An experimental study was carried out to investigate the joint behavior subjected to reverse cyclic loading and constant axial compressive load. Three precast beam-column interior were tested. The variables examined were the type of connection reinforcing bars and presence of transverse reinforcement in joint. Joint performance is evaluated on the basis of connection .strength, stiffness, energy dissipation, and drift capacity. Based on the test results, the precast connection is capable of matching or exceeding the performance of the monolithic connection and thereby provides the sufficient moment-resisting behavior to be applicable for moderate seismic regions.

구멍밤고둥, Chlorostoma argrostoma turbinata의 생식주기에 관한 연구

김병호,최광식,이영돈 제주대학교 해양연구소 1996 해양자원연구소연구보고 Vol.20 No.-

Reproductive cycle of the top shell, Chlorostoma argrostoma turbimta was investigated histologically to know it's gonadal development using gonadosomatic index(GS1). Samples were collected at the coastal area of Hamdok in Cheju-Do from Nobember, 1994 to September, 1995. 1. Chlorostoma argrostoma turbinata appeared to be dioecious, and neither sex reversal nor hermaphrodi-tic. The sex ratio was approximately 1:1. 2. The gonad was located on the surface of the liver in the posterior spiral meat part of the shell. 3. In male and female. GSI began to increase from April when water temperature began to increase and reached it's maximum value in August. It began to decrease September thereafter, maintained relatively low value until January. 4. The annual reproductive cycle of this species could be classified into five successive developmental stage ; multiplication stasge, growing stage, mature stage, spent stage, degenerative and recovery stage. 5. In male and female, spawning time were from March to December but, main spawing time were September.