경상분지 남동부에 분포하는 화강암질암의 광물학적 특징

황병훈,이준동,양경희,옥수석 한국광물학회 2004 광물과 암석 (J.Miner.Soc.Korea) Vol.17 No.4

경상분지 남동부에 분포하는 화강암질암은 야외산상 및 암석기재적 특징에 따라 크게 세 그룹으로 나눌 수가 있다. 즉, 그룹Ⅰ은 마그마혼합의 영향을 받은 암체로 염기성 미립 포유암 및 염기성광물 집합체를 다양하게 함유한다. 그룹Ⅱ는 낮은 압력하에서 형성된 천소관입암의 특징을 나타내며, 그룹Ⅲ은 A-형 화강암류의 특징을 보인다. 화강암질암의 광물학적 특징을 각 광물에 대하여 암상별로 살펴본 결과, 그룹에 따라 장석의 용리온토 및 흑운모의 성분 등에서 비교적 체계적인 성분변화를 보여주었다. 각섬석의 경우, 그룹Ⅰ의 암상들은 칼식-각섬석 영역에 속하며 각섬석 지압계에 의한 추정압력은 0.4~2.8 kb에 해당되었다. 그룹Ⅱ에서는 각섬석이 거의 산출되지 않았고, 그룹 Ⅲ의 각섬석은 알칼리-각섬석 영역의 리베카이트에 해당되었다. 흑운모의 화학조성은 비교적 그룹별로 군집을 잘 이루며, 그룹Ⅰ에서부터 그룹Ⅲ의 철질-앤나이트까지 연속적인 변화양상을 보여주었다. 사장석은 지역 및 암상별로 뚜렷한 차이를 나타내지 않으며, 대체로 알바이트, 올리고클레이스, 그리고 안데신의 영역에 해당된다. 그룹별로 퍼타이트 지온계에 의한 용리 온도를 검토한 결과, 그룹Ⅰ은 대체로 300~400℃ 정도이며, 그룹Ⅱ의 등립질화강암과 그룹Ⅲ의 알칼리장석화강암은 500~600℃ 정도로 높게 나타났다. Granitic rocks in the southeastern Gyeongsang. Basin can be classified into three groups. The group Ⅰ contains various mafic microgranular enclave (MME) and/or mafic clot which implies magma mixing or mingling. The group Ⅱ show the feature of shallow depth emplacement at low pressure, and the group Ⅲ is characterized by A-type granite implying extensional tectonic environment. Mineralogical characteristics of the granitic rocks have showed systematic variations in perthite exsolution temperatures and biotite compositions according to their rock facies, although they do not show any distinctively different trend in geography and textures or rock facies. Amphiboles from Group Ⅰ are calcic-amphibole and they were formed at 0.4~2.8 kb in pressure based on the amphibole geobarometry. Amphiboles from group Ⅲ are riebeckite, whileas amphiboles were not observed in Group Ⅱ The chemical composition of biotite defined in clusters showing a continuous spectrum between group Ⅰ to ferric-annite of group Ⅲ. The composition of plagioclase generally plotted in albite, oligoclase, and andesine area without any distinctive differences among their geography or rock facies. The exsolution temperatures by perthite geothermometry are calculated as 300~400℃ in Group Ⅰ, and 500~600℃ in equigranular granite of group Ⅱ and alkali-feldspar granite of group Ⅲ.

저급목재의 자기가수분해 전처리에 의한 고순도 셀룰로오스 기질의 제조

조남석,김병로,백기현 한국목재공학회 2002 목재공학 Vol.30 No.4

본 연구는 자기가수분해전처리를 통하여 반응성이 높은 고순도 셀룰로오스기질을 제조하기 위하여 수행되었다. 공시재의 일반 화학조성은 일본잎갈나무와 신갈나무간에 큰 차이가 있음을 알 수 있었다. 추출물함량은 일본잎갈나무가 신갈나무보다 상당량 많았다. 특히 냉·온수 추출물함량은 2.5∼3.5배 많았다. 이러한 추출물함량의 큰 차이는 일본잎갈나무에는 arabinogalactan이 많이 함유되어 있기 때문인 것으로 사료된다. 리그닌함량은 신갈나무가 잎갈나무보다 5% 정도 낮았으며, 그 대신 홀로셀룰로오스 및 펜토산함량이 각각 3% 정도 높은 값으로 나타났다. 22 ㎏/㎠ 수증기압력에서 5∼60분간의 자기가수분해 전처리과정에서 glucose 함량에는 변화가 없었으나, hemicellulose 및 lignin 함량은 급격한 변화를 보였다. 전처리과정에서 가수분해물의 pH는 3까지 저하되었으며, 이러한 경향은 신갈나무 및 일본잎갈나무에서 동일하게 나타났다. Sodium chlorite 및 sulfite 혹은 bisulfite 전처리 후 자기가수분해가 리그닌함량이 낮은 고순도셀룰로오스기질의 제조에 효과적이었다. 특히 자기가수분해처리재를 알칼리 및 산소-알칼리 2단처리함으로서 0∼0.2%의 리그닌함량을 가지는 고순도기질을 제조할 수 있었다. This study was performed to produce the high reactive lignin zero substrates from autohydrolyzed wood resources. In chemical compositions of used raw-materials, there were significant differences between two species, Japanese larch (Larix leptolepis) and oak (Quercus mongolica) woods. Japanese larch contained 2.5 to 3.5 times higher amounts of extractives than oak wood, which is mainly derived from high content of arabinogalactan in Japanese larch wood. Oak wood has 5% lower lignin content and 3% higher holocellulose and pentosans than larch wood. Concerned to changes in wood components during autohydrolysis pretreatment at 22 ㎏/㎠ steaming pressure for 5∼60 min, glucose content was constant during pretreatment, while hemicellulose and lignin were abruptly changed. Hemicellulose fraction was decreased significantly and lignin contents increased because of its condensation reaction with hemicellulose degradation products. The pH of hydrolyzates during pretreatment was decreased, reached upto pH 3 and since then leveled off. In the case of oak wood, same tendency was observed as in Japanese larch. Autohydrolysis followed by sodium chlorite and sulfite or bisulfite pretreatment was very effective in delignification of the substrates. In particular, two-stage delignification of autohydrolyzed woods with alkali and O_2-alkali resulted in very low lignin content substrates, such as 0∼0.2% lignin substrate.

소음성 난청 선별검사용 문진표의 유용성

송재석,최병수,원종욱,노재훈 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 소음 특수건강진단시 문진표의 유용성을 알기 위하여 실시되었다. 방법 : 자료로는 전국을 5대 권역으로 나눈 후 연구에 협조적인 산업보건기관을 대상으로 하여, 소음성 난청이 발생한 사업장과 그 부서에 대하여 정상인 근로자의 검진기록과 작업환경측정 기록 및 문진표를 수집하여 분석하였다. 결 과 : 각각의 문진 항목과 청력이상 여부에 대한 분석결과, 귀에서 소리가 난다고 하는 항목과 최근 작은 소리가 잘 안들린다고 하는 만성 특이적 항목만 청력이상 여부와 관계가 있었고, 급성 항목들은 청력 이상 여부와 통계적 연관성이 없었다. 또한 7개의 설문 항목과 연령 및 근무경력만을 이용하여 청력이상을 판정한다고 하였을 때, 실제 건강진단 결과와 비교하게 되면 민감도, 59 %, 특이도, 88 %로 계산 되었으며, 평균 23 %정도가 잘못 분류되었다. 결 론 : 만성적이고 특이적인 항목을 위주로 한 단순하고도 판별력있는 항목의 개발이 필요하며, 이러한 항목들을 전산화하였을 때, 효과적인 소음성 난청의 선별검사 체계를 구축할 수 있을 것이다. Objectives : This study was performed to investigate the effectiveness of the questionnaire. Methods : Workers'health examination records, work environment record, and questionnaires of selected industries as samples were analysed using logistic regression analysis and discrimination analysis Results'Cases of bearing impairment (Dl+C) as dependent variables, and age, work duration and level of environmental noise as independent variables were selected for multiple unconditional logistic regression analysis. Odds ratio was 4.04 in hearing difficulty, 2.78 in tlnnitus and 1.08 in age. In the second analysis Noise induced hearing loss is selected as dependent variable. The OR in hearing difficulty was 3.67(95 % C.1. : 1.61 8.61), and was 1.09(95 % C.1. : 1.05-1.14) in age. Conditionnal multlple logistic regression analysis was performed. In hearing impairment as dependent variable, the OR of age was 1.02(95 % C.1. : 1.00-1.04) and other variables were not significant. However, NIHL as dependent, the OR of hearing difficulty was 4.57(95 % C.1. : 1.43-14.67). According to multiple logistic regression adopting each items of questionnaire as dependent variable, the only item of hearing difficulty showed significant difference with hearing ability. The discrimination analysis was performed with the class variable of hearing impairment, and discrimination variables of age, work duration, and environment noise level. The sensitivity of 59 %, and specificity of 88 %, and average error count of 23 % were obtained. When the numbers of items answered in questionnaire were assumed as the parameter of judgement for noise induced hearing loss (NIHL), the highest sensitivity and specificity were 33.5% and 49.0% in cases of more than two items answered. Conclusions : The development of items that is simple and discriminative mainly consisted of chronic and specific diseases related items is needed. Computerization for newly developed items might be needed to establish effective surveillance system for NIHL in the future.

아래턱뼈 계측을 통한 한국인의 체질인류학적 특징 및 남녀판별함수 분석

허경석,고기석,정한성,강민규,최병영,김희진 대한췌담도연구회 2000 대한췌담도연구회지 Vol.5 No.4

흑염소 엑기스 식품의 소비성향

조규석,임병순,김계웅 공주대학교산업개발연구소 2000 産業開發硏究 Vol.8 No.-

This survey was carried out in order to collect basic data for the promotion of consumption of extracted juice from meat and bone of native goat. Data were gathered from a total of 148 peoples, who composed of 92 male and 56 female. Items investigated were experience and non-experience drunken, the kinds of healthy food , the reason of intake, intake frequency, intake season, the reason of non-intake, and supplementary item of goods at extract-making. The results obtained from answering after this survey were summarized as follows; 1. In answer about the drunken experience and non-experience for the healthy processed foods, the ratio of people surveyed was 85.14% and 15.86%, respectively. Male had tendency to be drunken much more than female with non-significance (P>0.05). And then, the older group showed tendency to be much more the drunken experience than the younger group. 2. The general herb-medicine among healthy foods used was the largest(50.0%), the extracted juice of goat meat and bone was used with the next largest(18.92%). The extracted juice was significantly(P<0.001) drunken much more in female than in male. And than, there was highly significant among age group in various healthy foods(P<0.01). 3. The healthy management among reasons of intake was answered in the largest(65.63%), the next answer was control after sickness(19.19%). There were not significant differences between gender group, and between age group, respectively. 4. The largest group at drinking times was answered to be two times a day(45.31%). There was not significant difference between gendergroup. However, there was highly significant between age group(P<0.001). 5. The drinking season was mostly answered to be in spring(35.94%), the next one was in winter(23.44%). The female group in spring was significantly(P<0.01) drunken much more than male. However, There was not significant between age group. 6. The largest reason for non-intakes of goat extracts was answered to be the decrease of the palatability(36.49%). There were significant differences between gender group, and between age group, respectively. 7. The supplementary item at extract-making was the promotion of palatability (44.95%). There was significant difference between gender group(P<0.05). And then, the group under 30 age answered mostly the promotion of palatability(50.95%), group more than 41 age answered price-down(41.38%). 8. 77.03% of questionnaire about drinking volume(80㎖) answered to be appropriate, 17.57% of those answered to be deficient. There were highly significant differences between gender group(P<0.01), and age group(P<0.01), respectively. 9. In the response after panel test of extract, 43.24% of questionnaire were good, while 10.81% of those were bad and very bad. Therefore, the scoring of sensory examination from 1(very bad) to 5 points(excellent) was 3.32. There was not significant difference between gender group. However, there was highly significant between age group(P<0.01).

단독주택의 용도별 에너지 소비에 관한 연구

김병수,장문석,박효순,송인춘 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

The purpose of this study is to analyze the situation of energy consumption and its characteristics in detached houses. The survey is carried out in detached houses to investigate the energy consumption and energy use trend in according to three different climate zones. Building energy simulation by DOE-2 computer program was undertaken for detailed analysis of the energy use characteristic in detached houses. Also, The room temperature and the energy use of the year were also calculated. Finally, The energy consumption characteristics of heating, cooling, cooking and electric equipments in detached houses depends on life style of resident such as room temperature, occupancy type and equipment operating schedule and etc. And also, the results of this study will be to provide basic data concerned with total energy consumption in detached houses.

X.25 패킷망 접속기능 설계 및 구현

신영석,김종교,전병실 전북대학교 전자산업개발연구소 1990 전자산업연구 Vol.1 No.-

This paper presents the design and implementation of packet function for X.25 network. Packet access modules which we developed, is considered layered and modular architecture in UNIX Enviornment host of VMEbus system. In the performance of data transfer, It is capability of 120-150 DPPS(Data Packet Per Second) and can be able to portable any computer as partial modified these software and hardware.

기도 이물의 임상적 고찰

김영석,이승규,이민재,백병준,오천환 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.2

Aspiration of foreign bodies into the airway is a common problem in spite of efforts to educate the public and it can be sometimes fatal accidents. A retrospective study has been performed for 34 cases of airway foreign bodies, which were obtained from April 1994 to August 1998 at Chunan hospital of Soonchunhyang University. The results were as follows: 1) Among the 34 cases, 26 cases(76.4%) were under the age of 3. The ratio of male and female was 1.4:1. 2) The most common symptom after foreign body aspiration was intractable cough(38.2%). 3) Abnormal findings in the chest X-ray films were found 24 cases(70.6%) and the most common abnormal radiologic feature was combination of pneumonia and atelectasis(37.5%), followed by combination of pneumonia and emphysema(16.6%), pneumonia alone(16.6%). 4) The nature of foreign body was vegetables in 20 cases(58.8%), miscellaneous in 11 cases(32.4%), metals in 2 cases(5.9%) and plastics in 2 cases(5.9%). 5) By distribution of the location of foreign bodies, 26 cases(76.4%) were located in the main bronchus(20 cases in right side and 6 cases in left side), 5 cases were in trachea, 2 cases were in larynx and 1 case was located at carina level. 6) By duration of foreign body lodgement in the airway, 15 cases(44.1%) were found within 24 hours, 9 cases(26.5%) were within 7 days, 7 cases(20.6%) were within 30 days and 3 cases(8.8%) were found over 1 month. 7) In mode of treatment, ventilating bronchoscopic removal under general anesthesia was performed in 29 cases(85.3%), thoracotomy with bronchotomy in 2 cases, thoracotomy with lobectomy in 1 case and postural drainage in 2 cases. 8) Complication rate according to the nature of foreign body was most high in vegetables(68.2%). 9) Correlation between complication rate and the duration of the foreign bodies in situ was definite.

비연결형테이타 서비스를 위한 B-ISDN구조

신영석,전병실 전북대학교 전자산업개발연구소 1991 전자산업연구 Vol.2 No.-

With the emergence of high-spped LAN/MAN/WAN's a major data application of broadband ISDN(B-ISDN) is the interconnection of LAN's over a wide area, by using ATM transfer networks. In this paper, We consider two approaches which is supported connectionaless service in Boradband ISDN. First scenario is 'Case A' which supported by network indirectly and second scenario is 'Case B' which network directly. We show that connectionless service should be supplied by the Broadband ISDN itself using message handlers which support message routing and addressing, i.e., connectionless service function(CLSF), as described by the CCITT. We proposed a network topology and techinique of message handler, which reduces the routing database and avoids transit message handler overload. We show an example of system configuration and gateway architecture of LAN to LAN connetion for connection service.

외상성 경막하수종 환아에서 조기 수술의 유용성

김병욱,이승명,김석원,김현성,신호 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.3

Background and Objectives: This study was performed to evaluate the usefulness of early operation in children with traumatic subdural hygroma. Materials and Methods: The subjects were eleven patients (Glasgow coma scale (GCS) score was below 10 and age was below 10 years old) who developed subdural hygroma after trauma between January 2000 to December 2002. Subduroperitoneal shunt was performed in one group and not performed in the other group. We analyzed the GCS score on admission and at 1 year after operation. Overall clinical results were evaluated retrospectively. Results: Patients who underwent operation exhibited higher GCS scores at 1 year after trauma compared to those in the patients who were treated by conservative therapy (p<0. 05). Conclusion: The early operation could be an effective treatment to children with subdural hygroma who showed delayed improvement of consciousness and to patients with hygroma that didn't decrease or was above moderate amount.