• 제목/요약/키워드: 2p24

검색결과 13,712건 처리시간 0.06초

참복과(복어목) 어류의 속별 척추골과 담기골 특징 (Generic Characters of Vertebrae and Pterygiophore of the Fishes of the Family Tetraodontidae (Teleostei: Tetraodontiformes))

  • 한경호;김용억
    • 한국수산과학회지
    • /
    • 제31권5호
    • /
    • pp.645-653
    • /
    • 1998
  • 참복과 (Tetraodontidae) 어류의 형태와 골격 및 분류를 연구하기 위하여, 1991년 3월부터 1994년 3월까지 우리나라 20개 지점에서 10속 27종의 표본을 채집하여, 척추골 및 담기골의 형태에 대하여 조사하였다. 1. 참복과 어류의 척추골수는 밀복속(Lagocephalus), 은띠복속 (Pleurancanthus), 불룩복속 (Spheoides), 꺼끌복 속(Arothron), 첼로복속(Chelonoeon) 및 청복속(Canthigaster)이 17$\~$19개이며, 수지복속(Ephippion), 별복속 (Boesemanichthys) 및 대치복속(Feroxodon)의 어류는 20개이고, 반면에 참복속(Takifugu) 어류는 19$\~$25개였다. 2. 참복과 어류의 척추골수는 17$\~$25개로, 밀복속의 밀복 (L. lunaris과 은띠복속의 은띠복 (P. sceleatus), 청복속 등이 17개로 최소치를, 참복속의 황복 (T. obscurus)이 24$\~$25개로 복어과 가운데 최대치를 보였다. 3. 밀복속의 척추골수는 밀복이 17개, 민밀복 (L. inermis)이 18개, 흑밀복 (L. gloveri), 은밀복 (L. wheeleri) 및 은민밀복 (L. larigatus)이 19개로 다른 속 어류들 보다 적은 수의 척추골을 가지고 있는 점에서 더 분화되어 있다. 4. 척추골 가운데 복추골의 신경극이 참복속의 졸복(T. pardalis)과 황복이 제$1\~5$번째 척추골의 신경극까지 쌍으로 되어 있고, 나머지 다른 종과 속 어류들은 제1$\~$4 번째 척추골의 신경극이 쌍으로 되어 있다. 5. 밀복속과 은띠복속의 큰 특징은 등쪽과 배쪽 담기골에 뒷 돌기가 있으며, 상미축골 (epural)이 넓은 판 모양이고, 복추골의 혈관극에 돌기가 없는 점에서 다른 속과 쉽게 구별된다. 6. 은띠복속의 은띠복은 꼬리자루 부분이 날씬하고 측편되어 있어서, 미추골 뒷부분의 신경극과 혈관극이 다른 속 어류와 비교해 짧은 점에서 구별된다 7. 청복속은 등지느러미와 뒷지느러미를 지지하는 제1 담기골이 다른 속에 비하여 매우 비대하여 큰 편이다. 또한 복추골의 뒷부분에 혈관극과 혈관궁이 둥글고 판판하게 잘 발달되어 참복과의 다른 속과 큰 차이를 보였다.

  • PDF

연화제 첨가가 우렁이 중간수분식품의 품질 특성에 미치는 영향 (Effect of the Addition of Tenderizers on Quality Characteristics of Intermediate Moisture-apple snail(Cipangopaludin chinensis malleasta) Products)

  • 양한술;천지연;김병철;강성원;정창호;허호진;조성환;최성길
    • 한국식품저장유통학회지
    • /
    • 제14권3호
    • /
    • pp.288-293
    • /
    • 2007
  • 본 실험에서는 기능성이 풍부한 우렁이를 가공하여 중간 수분식품으로 개발하기 위하여 일반적인 건조제품의 특성인 단단한 조직감을 개선하고자 먼저 우렁이를 천연조직 연화제들을 첨가한 침지액에 침지한 후 냉풍건조를 이용해 반건조 우렁이를 제조하고 이들의 특성을 조사하였다. Glycerol을 연화제로 첨가한 경우 전단력의 감소와 더불어 수분함량 및 수분활성도의 감소 효과를 가져 올 수 있었던 반면, 키위나 파인애플을 첨가한 경우는 전단력은 감소한 반면 수분함량과 수분활성도는 증가하는 것을 확인하였다. SDS-PAGE 분석 결과, 키위나 파인애플의 단백질 분해효소들이 근원섬유단백질 구조를 붕괴시킴으로 결과적으로 전단력이 낮아지는 결과를 가져왔음을 확인하였다. 기호도면에서는 glycerol의 경우 첨가하지 않은 것보다 다소 향상되었으나 키위나 파인애플에 비하여 그 영향이 크지 않은 것으로 나타났다. 키위와 파인애플의 경우는 과일이 지니는 독특한 맛과 향이 전반적인 제품의 풍미에 크게 영향을 주는 것으로 판단되며 이들이 함유하는 효소에 의한 근원단백질 붕괴에 의한 조직감 향상은 이들 연화제가 가지는 또 다른 이점이라 할 수 있겠다. 우렁이를 이용한 중간수분 식품 제조시 파인애플을 5%수준으로 사용하는 경우 상당한 기호도를 가지는 제품을 제조할 수 있는 가능성을 확인하였으며, 중간수분식품의 일반적 특성인 단단한 조직감도 효과적으로 개선할 수 있음을 보여주었다.

기능성 전통 음청류 선호도와 구매도 조사 (Investigation into the Preference and Demand for Functional Drinks (Korean Traditional Drinks))

  • 김귀순;박금순
    • 한국식품조리과학회지
    • /
    • 제28권4호
    • /
    • pp.413-421
    • /
    • 2012
  • 본 연구는 경북지역 20세 이상 성인 418명을 대상으로 전통 음청류에 대한 인지도 및 기호도와 향후 음청류 대중화 및 소비 전망에서 기능성 전통 음청류에 대해 선호도와 구매의사를 살펴보았다. 조사 대상자는 남자 170명, 여자 248명, 30대 29.2%, 40대 28.0%, 20대 27.5%와 50대 15.3%로 기혼이 57.7%로 미혼보다 많았다. 성별에 따른 음청류 선호도는 남녀 모두 과반수 이상이 좋아한다고 하였으며 명절이나 특별한 행사에 많이 섭취하는 것으로 나타났다. 섭취 이유로는 여성은 맛이 좋다와 남성은 우리 고유의 음식이라서 섭취한다고 하였으며 섭취하지 않는 이유로는 입맛에 맞지 않아서가 높게 나타났다. 음청류의 종류 중 남녀 각각 식혜를 4.12, 4.10으로 가장 높게 인지하고 있었으며 수정과, 차, 화채 순으로 나타나 성별간 유의한 차이는 없었다. 음청류 종류에 따른 기호도는 남자가 식혜 3.92, 차 3.61, 화채 3.58순으로 나타났으며 여자는 식혜 3.51, 화채 3.51, 차 3.45순으로 나타났다. 음청류의 소비전망은 46.9%가 증가될 것이다, 36.1%가 그대로일 것이다. 17.0%가 감소할 것이다로 나타났으며 기능성 음청류 개발에 대해 88.5%가 개발동의 가능성을 보여 음청류의 소비전망이 긍정적으로 나타났다. 기능성 첨가 음청류에 대한 소비자 인식에서 영양보충용, 당뇨조절용, 보양용이 높게 나타났으나 대부분의 기능성 음청류 개발 필요에 대해 3.5이상의 점수를 보였다. 기능성 음청류 개발 시 구매 의사도 개발 필요도와 같은 양상으로 나타났으며 기능성이 첨가된 전통 음청류 중 구매의사의 살펴본 결과 남녀 모두 식혜를 가장 높게 선호하는 것으로 나타났다. 기능성 첨가 음청류에 대한 대중화 방안으로 품질지향이미지, 대중성지향이미지, 상품 속성 지향 이미지 세 요인으로 분류하여 개발된 기능성 음청류의 구매도와의 영향성을 살펴본 결과 모든 요인에서 p<.001의 유의한 차이가 나타났으며 품질지향 이미지가 가장 높은 영향력을 보였다.

안동시 저수지에서의 대량 어류 폐사에 대한 원인과 대책에 관한 연구 (Study on Causes and Countermeasures for the Mass Death of Fish in Reservoirs in Andong-si)

  • 배수호;황선진;김연정;정철호;김성윤;유건상
    • 한국환경농학회지
    • /
    • 제42권1호
    • /
    • pp.52-62
    • /
    • 2023
  • This study focused on determining the specific causes and prevention methods of mass fish deaths occurred in five reservoirs (Gagugi, Neupgokgi, Danggokgi, Sagokji, and Hangokji) in Andong-si. For this purpose, a survey of agricultural land and livestock in the upper part of the reservoirs and analysis of water quality in the reservoir irrespective of whether it rains or not were conducted. We attempted to examine the changes in dissolved oxygen (DO) in the surface and bottom layers of reservoirs and changes in DO depending on the amount of livestock compost and time. Based on the above investigations, treatment plans were established to efficiently control the inflow of contaminated water into reservoirs. The rainfall and farmland areas in the upper part of the reservoir were investigated using Google and aviation data provided by the Ministry of Land, Infrastructure, and Transport. The current status of livestock farms distributed around the reservoirs was also examined because compost from these farms can flow into the reservoir when it rains. Various water quality parameters, such as phosphate phosphorus (PO4-P) and ammonium nitrogen (NH3-N), were analyzed and compared for each reservoir during the rainy season. Changes in the DO concentration and electrical conductivity (EC) were also observed at the inlet of the reservoir during raining using an automated instrument. In addition, DO was measured until the concentration reached 0 ppm in 10 min by adding livestock compost at various concentrations (0.05%, 0.1%, 0.3%, and 0.5% by wt.), where the concentration of the livestock compost represents the relative weight of rainwater. The DO concentration in the surface layer of reservoirs was 3.7 to 5.3 ppm, which is sufficient for fish survival. However, the fish could not survive at the bottom layer with DO concentration of 0.0-2.1 ppm. When the livestock compost was 0.3%, DO required 10-19 h to reach 0 ppm. Considering these results, it was confirmed that the DO in the bottom layer of the reservoir could easily change to an anaerobic state within 24 h when the livestock compost in the rainwater exceeds 0.3%. The results show that the direct cause of fish mortality is the inflow of excessive livestock compost into reservoirs during the first rainfall in spring. All the surveyed reservoirs had relatively good topographical features for the inflow of compost generated from livestock farms. This keeps the bottom layer of the reservoir free of oxygen. Therefore, to prevent fish death due to insufficient DO in the reservoir, measures should be undertaken to limit the amount of livestock compost flowing into the reservoir within 0.3%, which has been experimentally determined. As a basic countermeasure, minerals such as limestone, dolomite, and magnesia containing calcium and magnesium should be added to the compost of livestock farms around the reservoir. These minerals have excellent pollutant removal capabilities when sprayed onto the compost. In addition, measures should be taken to prevent fish death according to the characteristics of each reservoir.

지하수 관개에 의한 수도의 멸준양상과 그 방지책에 관한 연구 (Studies on the Rice Yield Decreased by Ground Water Irrigation and Its Preventive Methods)

  • 한욱동
    • 한국농공학회지
    • /
    • 제16권1호
    • /
    • pp.3225-3262
    • /
    • 1974
  • The purposes of this thesis are to clarify experimentally the variation of ground water temperature in tube wells during the irrigation period of paddy rice, and the effect of ground water irrigation on the growth, grain yield and yield components of the rice plant, and, furthermore, when and why the plant is most liable to be damaged by ground water, and also to find out the effective ground water irrigation methods. The results obtained in this experiment are as follows; 1. The temperature of ground water in tube wells varies according to the location, year, and the depth of the well. The average temperatures of ground water in a tubewells, 6.3m, 8.0m deep are $14.5^{\circ}C$ and $13.1^{\circ}C$, respercively, during the irrigation period of paddy rice (From the middle of June to the end of September). In the former the temperature rises continuously from $12.3^{\circ}C$ to 16.4$^{\circ}C$ and in the latter from $12.4^{\circ}C$ to $13.8^{\circ}C$ during the same period. These temperatures are approximately the same value as the estimated temperatures. The temperature difference between the ground water and the surface water is approximately $11^{\circ}C$. 2. The results obtained from the analysis of the water quality of the "Seoho" reservoir and that of water from the tube well show that the pH values of the ground water and the surface water are 6.35 and 6.00, respectively, and inorganic components such as N, PO4, Na, Cl, SiO2 and Ca are contained more in the ground water than in the surface water while K, SO4, Fe and Mg are contained less in the ground water. 3. The response of growth, yield and yield components of paddy rice to ground water irrigation are as follows; (l) Using ground water irrigation during the watered rice nursery period(seeding date: 30 April, 1970), the chracteristics of a young rice plant, such as plant height, number of leaves, and number of tillers are inferior to those of young rice plants irrigated with surface water during the same period. (2) In cases where ground water and surface water are supplied separately by the gravity flow method, it is found that ground water irrigation to the rice plant delays the stage at which there is a maximum increase in the number of tillers by 6 days. (3) At the tillering stage of rice plant just after transplanting, the effect of ground water irrigation on the increase in the number of tillers is better, compared with the method of supplying surface water throughout the whole irrigation period. Conversely, the number of tillers is decreased by ground water irrigation at the reproductive stage. Plant height is extremely restrained by ground water irrigation. (4) Heading date is clearly delayed by the ground water irrigation when it is practised during the growth stages or at the reproductive stage only. (5) The heading date of rice plants is slightly delayed by irrigation with the gravity flow method as compared with the standing water method. (6) The response of yield and of yield components of rice to ground water irrigation are as follows: \circled1 When ground water irrigation is practised during the growth stages and the reproductive stage, the culm length of the rice plant is reduced by 11 percent and 8 percent, respectively, when compared with the surface water irrigation used throughout all the growth stages. \circled2 Panicle length is found to be the longest on the test plot in which ground water irrigation is practised at the tillering stage. A similar tendency as that seen in the culm length is observed on other test plots. \circled3 The number of panicles is found to be the least on the plot in which ground water irrigation is practised by the gravity flow method throughout all the growth stages of the rice plant. No significant difference is found between the other plots. \circled4 The number of spikelets per panicle at the various stages of rice growth at which_ surface or ground water is supplied by gravity flow method are as follows; surface water at all growth stages‥‥‥‥‥ 98.5. Ground water at all growth stages‥‥‥‥‥‥62.2 Ground water at the tillering stage‥‥‥‥‥ 82.6. Ground water at the reproductive stage ‥‥‥‥‥ 74.1. \circled5 Ripening percentage is about 70 percent on the test plot in which ground water irrigation is practised during all the growth stages and at the tillering stage only. However, when ground water irrigation is practised, at the reproductive stage, the ripening percentage is reduced to 50 percent. This means that 20 percent reduction in the ripening percentage by using ground water irrigation at the reproductive stage. \circled6 The weight of 1,000 kernels is found to show a similar tendency as in the case of ripening percentage i. e. the ground water irrigation during all the growth stages and at the reproductive stage results in a decreased weight of the 1,000 kernels. \circled7 The yield of brown rice from the various treatments are as follows; Gravity flow; Surface water at all growth stages‥‥‥‥‥‥514kg/10a. Ground water at all growth stages‥‥‥‥‥‥428kg/10a. Ground water at the reproductive stage‥‥‥‥‥‥430kg/10a. Standing water; Surface water at all growh stages‥‥‥‥‥‥556kg/10a. Ground water at all growth stages‥‥‥‥‥‥441kg/10a. Ground water at the reproductive stage‥‥‥‥‥‥450kg/10a. The above figures show that ground water irrigation by the gravity flow and by the standing water method during all the growth stages resulted in an 18 percent and a 21 percent decrease in the yield of brown rice, respectively, when compared with surface water irrigation. Also ground water irrigation by gravity flow and by standing water resulted in respective decreases in yield of 16 percent and 19 percent, compared with the surface irrigation method. 4. Results obtained from the experiments on the improvement of ground water irrigation efficiency to paddy rice are as follows; (1) When the standing water irrigation with surface water is practised, the daily average water temperature in a paddy field is 25.2$^{\circ}C$, but, when the gravity flow method is practised with the same irrigation water, the daily average water temperature is 24.5$^{\circ}C$. This means that the former is 0.7$^{\circ}C$ higher than the latter. On the other hand, when ground water is used, the daily water temperatures in a paddy field are respectively 21.$0^{\circ}C$ and 19.3$^{\circ}C$ by practising standing water and the gravity flow method. It can be seen that the former is approximately 1.$0^{\circ}C$ higher than the latter. (2) When the non-water-logged cultivation is practised, the yield of brown rice is 516.3kg/10a, while the yield of brown rice from ground water irrigation plot throughout the whole irrigation period and surface water irrigation plot are 446.3kg/10a and 556.4kg/10a, respectivelely. This means that there is no significant difference in yields between surface water irrigation practice and non-water-logged cultivation, and also means that non-water-logged cultivation results in a 12.6 percent increase in yield compared with the yield from the ground water irrigation plot. (3) The black and white coloring on the inside surface of the water warming ponds has no substantial effect on the temperature of the water. The average daily water temperatures of the various water warming ponds, having different depths, are expressed as Y=aX+b, while the daily average water temperatures at various depths in a water warming pond are expressed as Y=a(b)x (where Y: the daily average water temperature, a,b: constants depending on the type of water warming pond, X; water depth). As the depth of water warning pond is increased, the diurnal difference of the highest and the lowest water temperature is decreased, and also, the time at which the highest water temperature occurs, is delayed. (4) The degree of warming by using a polyethylene tube, 100m in length and 10cm in diameter, is 4~9$^{\circ}C$. Heat exchange rate of a polyethylene tube is 1.5 times higher than that or a water warming channel. The following equation expresses the water warming mechanism of a polyethylene tube where distance from the tube inlet, time in day and several climatic factors are given: {{{{ theta omega (dwt)= { a}_{0 } (1-e- { x} over { PHI v })+ { 2} atop { SUM from { { n}=1} { { a}_{n } } over { SQRT { 1+ {( n omega PHI) }^{2 } } } } LEFT { sin(n omega t+ { b}_{n }+ { tan}^{-1 }n omega PHI )-e- { x} over { PHI v }sin(n omega LEFT ( t- { x} over {v } RIGHT ) + { b}_{n }+ { tan}^{-1 }n omega PHI ) RIGHT } +e- { x} over { PHI v } theta i}}}}{{{{ { theta }_{$\infty$ }(t)= { { alpha theta }_{a }+ { theta }_{ w'} +(S- { B}_{s } ) { U}_{w } } over { beta } , PHI = { { cpDU}_{ omega } } over {4 beta } }}}} where $\theta$$\omega$; discharged water temperature($^{\circ}C$) $\theta$a; air temperature ($^{\circ}C$) $\theta$$\omega$';ponded water temperature($^{\circ}C$) s ; net solar radiation(ly/min) t ; time(tadian) x; tube length(cm) D; diameter(cm) ao,an,bn;constants determined from $\theta$$\omega$(t) varitation. cp; heat capacity of water(cal/$^{\circ}C$ ㎥) U,Ua; overall heat transfer coefficient(cal/$^{\circ}C$ $\textrm{cm}^2$ min-1) $\omega$;1 velocity of water in a polyethylene tube(cm/min) Bs ; heat exchange rate between water and soil(ly/min)

  • PDF

농촌 지역의 중년이후 성인의 염분 민감도에 따른 짠 음식 섭취 관련 식행동 (Dietary Behavior Related to Salty Food Intake of Adults Living in a Rural Area according to Saline Sensitivity)

  • 김미경;한 장일;정영진
    • Journal of Nutrition and Health
    • /
    • 제44권6호
    • /
    • pp.537-550
    • /
    • 2011
  • 본 연구에서는 고혈압 유병율이 높고 소금이 다량 함유된 김치, 장아찌, 장류 위주의 식생활을 하는 농촌 성인의 고혈압 및 만성 퇴행성 질병의 유병율을 낮추는데 도움을 주는 기초자료를 마련하고자, 농촌의 중년기 이후 성인의 식습관 및 건강습관과 식염섭취 행동을 조사하고 이에 영향을 미치는 식행동 요인들을 조사하였다. 조사 대상은 충북 옥천군의 옥천읍과 8개면 성인 주민을 대상으로 비례추출에 의해 402가구를 선정하고 가구당 1인씩 총 402인을 유의 추출하였다. 1% 소금물에 대한 짠맛 민감도를 조사하여 민감군, 보통군, 둔감군의 세 군으로 분류하고 각 군의 식행동과 주변인의 영향과 지원을 분석하였다. 1) 본 연구 대상자는 남자 133명 (33.1%), 여자 269명 (66.9%), 총 402명으로 평균 연령은 $58.9{\pm}9.4$세로 남녀 모두 61~70세 (40.0%)가 가장 많았다. 2) 조사대상자의 평균 체질량 지수 (kg/$m^2$)는 남자 $23.6{\pm}3.5$, 여자 $24.6{\pm}3.3$로 여자가 남자에 비해 과체중의 경향이 컸다. 허리-엉덩이 둘레비 (WHR)도 남자 $0.90{\pm}0.12$, 여자 $0.92{\pm}0.49$로 여자가 높았고, 연령별로는 모두 50~64세 (남 $0.92{\pm}0.13$, 여 $0.98{\pm}0.74$)에서 가장 높았다가 65세 이상에서 감소하였다 (남 $0.89{\pm}0.09$, 여 $0.90{\pm}0.05$). 3) 평소 먹는 음식의 간에 대한 응답에서 보통으로 먹는다 38.1%, 짜지 않게 먹는다 35.1%, 짜게 먹는다 26.9%의 순서로 많았는데, 65세 이상의 최고령층에서 짜게 먹는다는 응답이 34.6%로 가장 많았다. 음식 간에 대해 자녀보다 더 짜게 먹는 다는 응답도 65세 이상의 최고령층에서 가장 높았다 (p < 0.01). 1% 소금물에 대해 50.3%는 짜다, 41%는 보통이다, 8.7%는 싱겁다고 응답하였다. 4) 식염섭취 관련 식습관 및 식행동 조사에서 짠맛 둔감군은 보통군이나 민감군에 비해 규칙적으로 식사하는 비율이 낮은데 반해, 과식비율, 10분 이내의 식사속도, 편식, 튀김선호 비율이 세 군 중 가장 높았다. 5) 식염섭취에 대한 견해 및 행동에서 짠맛 둔감군이 짠 음식을 습관적으로 가장 많이 섭취하였고, 짠 음식 섭취가 건강에 좋지 않다는 인식, 짜게 먹는 습관을 바꾸겠다는 의지나 실천도도 가장 낮았다. 6) 식염섭취 감소를 위한 지원이나 영향력이 가장 큰 사람은 배우자 등 가족보다 의료 및 영양 전문가들 (각각 58.4%, 56.8%)이었다. 7) 식염섭취에 대한 자아효능감 조사에서 식염 섭취 조절이 어렵다고 답한 경우는 매끼니 (46.3%), 배우자가 짠 음식을 좋아할 때 (45.2%), 외식 할 때 (36.3%)의 순으로 높았다. 특히 민감군은 매 끼니, 외식시, 배우자가 짠 음식을 좋아하는 경우 모두에서 식염조절 능력이 높은 편이었다. 8) 식품군별 섭취빈도에서 유의적인 차이를 나타낸 식품군은 채소류, 과일류, 매운 음식류로서, 민감군에서 채소류와 과일류의 섭취빈도가 높은 반면 둔감군은 매운 음식류에 대한 섭취빈도가 높았다. 농촌의 중년기 이후 성인의 식습관 및 건강습관과 식염섭취 행동을 조사한 결과, 짠 음식 섭취가 습관화된 행태를 보이며 식염 섭취와 인식정도에 비해 식염 저감을 위한 실천정도는 낮아 주민들이 손쉽게 실천할 수 있는 효과적인 저염섭취를 위한 식생활 실천방안의 제시가 요구된다. 또한 의료 및 영양전문가들을 통한 영양교육과 배우자 등 가족에 대한 교육이 강화되고 산업체에서의 저염식품 개발 등을 유도하여 염분섭취 감소를 위한 식생활 환경 구축과 실천 가능한 범국민적 저염식 영양교육 지원책이 정부차원에서 더 적극적으로 수립되어야겠다.

도로녹화(道路綠化) 및 도로조경기술개발(道路造景技術開発)에 관(関)한 연구(硏究) (Studies on the Roadside Revegetation and Landscape Reconstruction Measures)

  • 우보명;손두식
    • 한국산림과학회지
    • /
    • 제48권1호
    • /
    • pp.1-24
    • /
    • 1980
  • 우리나라에서 도로(道路)의 녹화(綠化) 및 조경(造景)에 관(関)한 새로운 기술(技術)의 개발(開発) 및 발전(発展)을 위한 주요한 기초과제중(基礎課題中)의 하나는 현재(現在)까지 시행(施行)되고 있는 이 분야(分野)의 기술현황(技術現況)을 조사분석(調査分析)하여 현재(現在)의 기술수준(技術水準)을 평가(評価)하고, 이러한 자료(資料)와 선진국(先進国)의 기술(技術)을 종합(綜合)하여 우리나라의 실정(実情)에 적용(適用)할 수 있는 도로녹화조경기술기준(道路綠化造景技術基準)을 설정(設定)함에 있다고 본다. 도록녹화조경기술(道路綠化造景技術)은 도로(道路)의 녹화(綠化) 및 경관(景観)의 조성(造成)과 도로환경(道路環境)의 수복보전(修復保全)을 통하여 도로기능(道路機能)을 향상(向上)하기위하여 도로용지내(道路用地內)에 식물(植物) (녹색환경(綠色環境))을 도입(導入)하는 녹화(綠化) 및 조경기술(造景技術)로서 최근(最近)에 와서는 도로(道路)의 녹화조경면(綠化造景面)에서 뿐만 아니라 국민(国民)의 생활환경보전면(生活環境保全面)에서도 그 중요성(重要性)이 강조(强調)되고 있다. 1. 도로녹화조경(道路綠化造景)의 기본기술(基本技術)은 도로건설예정지내(道路建設豫定地內)에 있는 기존 유용자연식생(有用自然植生)을 최대한(最大限) 보존활용(保存活用)함은 물론 도로건설시(道路建設時) 또는 건설후(建設後)에 각종(各種) 조경식물(造景植物)을 식재육성(植栽育成)하는 것이므로, 이러한 도로식재(道路植栽)는 조속히 도로환경(道路環境)을 녹화(綠化)하고 보다 아름다운 도로경관(道路景観)을 조성(造成)하여 쾌적(快適)한 도로(道路)가 되도록 계획(計劃) 설계(設計) 시공(施工) 관리(管理)해야 될 것이다. 2. 도로녹화조경(道路綠化造景)의 기본대상(基本対象)은 도로녹화(道路綠化), 보도식재(步道植栽) 및 식수대(植樹帶) 환경시설대(環境施設帶) 및 꽃동산, 가로수등(街路樹等)의 식재(植栽) 및 조성(造成)과 도로(道路)비탈면의 안정녹화조경(安定綠化造景)이며 그밖에 중앙분리대(中央分離帶) 및 교통도(交通島), "인터체인지" 및 휴게시설등(休憩施設等)도 필수요소(必須要素)가 된다. 3. 도로녹화조경기술개발(道路綠化造景技術開発)의 기본방향(基本方向)은 도로교통(道路交通)의 안전(安全)과 쾌적성(快適性)을 높이고 연도(沿道)의 자연환경(自然環境)의 보전(保全) 및 생활환경(生活環境)의 녹화개선(綠化改善)에 기여하여 종합적(綜合的)인 도로기능(道路機能)을 발휘(発揮)할 수 있도록 설정(設定)해야 될 것이다. 4. 도로녹화조경(道路綠化造景)의 기본기능(基本機能)은 개개(個個) 수목(樹木)의 식재(植栽)로서 복수녹(複数綠)의 효용(効用)을 구성(構成)함에 있으며, 이러한 기본기능(基本機能)은 경관조성기능(景観造成機能)(경관조절기능(景観調整機能) 및 경관연출기능(景観演出機能)), 환경보전기능(環境保全機能)((재해방지기능(災害防止機能) 및 환경조화기능(環境調和機能)), 그리고 교통안전기능(交通安全機能) (유도기능(誘導機能), 사고방지기능(事故防止機能) 및 휴게조성기능(休憩助成機能)으로 대별(大別)하여 분석평가(分析評価)하는 제도(制度)가 수립(樹立)되어야 할 것이다. 5. 도로(道路)비탈면의 녹화조경시(綠化造景時)에는 특(特)히 교통안전성(交通安全性)의 확보(確保), 생활환경(生活環境)의 보전(保全), 경관(景観)의 조화(調和)와 창조(創造), 조경식물(造景植物)의 선택(選択) 및 생육기반(生育基盤)의 안정시(安定等)에 관(関)한 세부적인 조사(調査)가 선행(先行)되어야 한다. 6. 도로식재시공(道路植栽施工)에 있어서는 기본공정관리계획(基本工程管理計劃), 즉 품질관리(品質管理), 공정관리(工程管理), 안전관리(安全管理)에 관(関)한 사항(事項)은 물론 적기적수(適期適樹) 및 적지적수(適地適樹)가 되도록 해야 된다. 7. 녹화수(綠化樹)의 식재(植栽)(특(特)히 가로수(街路樹))에 있어서는 지주설치(支柱設置)의 재료(材料) 및 형식(型式), 시공(施工) 및 관리기술(管理技術)에 관(関)한 시험연구(試驗硏究)가 시급히 요망(要望)된다. 8. 도로녹화조경관리기술(道路綠化造景管理技術)의 기본방향(基本方向)은 풍부한 푸른경관(景観)과 쾌적(快適)한 도로환경(道路環境)을 지속적으로 확보(確保) 유지(維持) 향상(向上)할수 있도록 설정(設定)해야 될것이며, 이를 위해서는 수목(樹木)의 전정(剪定) 및 정자(整姿), 병충해(病虫害)의 방제(防除), 식재지(植栽地) 및 식재수(植栽樹)의 유지관리(維持管理)등에 대해서 정규적인 점검을 실시하여 필요(必要)한 조치를 제때에 취할수 있도록 하는 점검관리제(占検管理制)를 채택(採択)해야 될 것이다.

  • PDF

인천국제공항 착륙대 잔디 식재 지반 조성을 위한 영종도 매립 토양 개량 (Soil amendment for turfgrass vegetation of the Incheon International Airport runway side on the Yeongjong reclaimed land)

  • 류순호;정영상;주영규;최병권;우헌영;이태영
    • 한국토양비료학회지
    • /
    • 제35권2호
    • /
    • pp.93-104
    • /
    • 2002
  • 인천 영종도와 영유도를 잇는 새로운 간척지에 건설되고 있는 인천국제공의 녹지 조경 식재 지반을 조성하는 데 필요한 기술적 지표와 효율적 관리 방안을 마련하기 위한 현지 연구가 1996년 6월부터 1998년 6월까지 24개월간 수행되었다. 인천국제공항 건설 부지 중 1995년 8월에 매립이 완료된 여객터미날 주차장 예정지에 8 ha의 시험포장을 조성하였다. 갯벌 지역에 대한 연구를 위하여 자생잔디 보호 구역 부근에 염생 식물 종자 채취 구역을 별도로 1.5ha 조성하였다. 조성된 $492{\times}190m^2$의 시험 포장에 암거 배수의 효과 및 적절한 배수 간격을 설정하기 위해 무암거배수구(A), 암거 간격 45m구(B), 암거간격 22.5m구(C)를 설치하였다. 배수 시설은 처리는 단반복으로 하였다. 토양 개량을 위한 식재 지반 처리는 준설 모래로 매립하여 지균작업을 하여 매립고를 맞춘 무처리를 두고, 산토 5-cm 복토구와 20-cm 복토구 처리, 화학비료 사용과 유기질비료의 시용, 인공 토양 조성구, 그리고 보습재의 처리 등을 조합하여 17개 처리를 하였다. 식재된 잔디는 5종으로 한국형 잔디로 들잔디, 영종도 자생 갯잔디, 도입 한지형 잔디로 한지형 혼파I(tall fescue 30%, kentucky blue grass 40%, perenial ryegrass 30%), 한지형 혼파II(tall fescue 40%, perenial ryegrass 20%, fine fescue 20%, alkaligrass 20%)이었다. 시험 포장의 토성은 모래로 염농도가 높았고, 유기물 함량과 비료 성분 함량이 낮아 비옥도가 낮은 토양이었다. 투수속도는 빠른 토양이었다. 암거 배수 후 제염은 빨랐다. 잔디 식재 후 암거 배수 처리간에는 토양의 투수속도가 매우 빠른 때문으로 잔디 생육도에 큰 차이를 보이지 않았다. 토양 개량 처리에 따른 잔디의 피복도와 생육도를 비교한 결과 들잔디 영양체 식재구가 가장 좋았고, 한국잔디도 양호하였다. 양종도 자생 갯잔디의 피복도와 생육도는 이들보다 떨어졌다. 도입 잔디 한지형 혼파는 한국잔디 영양체 식재구에 비하여 떨어졌는 데, 이는 여양체 증식과 파종의 차이로 판단된다. 산토 20cm 복토구와 5cm 복토구의 잔디 생육을 비교한 결과 한국잔디 생육은 20cm복토구에서 좋았으나, 화하비료 사용시 도입 잔디 혼파구에서는 큰 차이가 없었다. 토양 개량재 시용구와 화학비료 시용구간에 큰 생육의 차이가 없었다. 축분 유기질 비료의 사용구는 화학비료 사용구에 비하여 한국잔디 영양체 식재에는 효과가 있었으나, 도입잔디 혼파에는 차이가 없었다. 보슘재 처리는 무처리에 비해 효과가 있었고, 산토 복토 보다는 미흡하나, 큰 차이는 없어, 산토 부족시 대체 효과가 있었다. 이 연구의 결과 인천공항 착륙대 잔디 식재 지반 조성에는 준설토 특성 상 암거 배수는 불필요하며, 토양 개량에는 한국 잔디 영양체가 식재에 산토 5-cm를 복토하면 충분한 것으로 판단되었다. 이와 함께 축분 발효 퇴비와 복합비료 기비가 필요하며, 고밀도의 잔디가 요구되는 곳에서는 산토 20cm 복토가 바람직한 것으로 판단되었다.

Sensory Information Processing

  • Yoshimoto, Chiyoshi
    • 대한의용생체공학회:의공학회지
    • /
    • 제6권2호
    • /
    • pp.1-8
    • /
    • 1985
  • The wall shear stress in the vicinity of end-to end anastomoses under steady flow conditions was measured using a flush-mounted hot-film anemometer(FMHFA) probe. The experimental measurements were in good agreement with numerical results except in flow with low Reynolds numbers. The wall shear stress increased proximal to the anastomosis in flow from the Penrose tubing (simulating an artery) to the PTFE: graft. In flow from the PTFE graft to the Penrose tubing, low wall shear stress was observed distal to the anastomosis. Abnormal distributions of wall shear stress in the vicinity of the anastomosis, resulting from the compliance mismatch between the graft and the host artery, might be an important factor of ANFH formation and the graft failure. The present study suggests a correlation between regions of the low wall shear stress and the development of anastomotic neointimal fibrous hyperplasia(ANPH) in end-to-end anastomoses. 30523 T00401030523 ^x Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70$\pm$1.32mmHg/min)compared to CF dialyzers(4.32$\pm$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers. 30527 T00401030527 ^x For quantitative measurement of reflected light from a clinical diagnostic strip, a prototype old reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate reflectance parameters. The strip was illuminated at 45˚c through optical fiber and the intensity of reflected light was determined at rectanguLat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500, 550, 570 and 610nm) for blood glucose strip. For higher concentration than 300mg/41 about glucose, a saturation state of abforbance was observed at 500, 550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm. 30535 T00401030535 ^x Radiation-induced fibrosarcoma tumors were grown on the flanks of C3H mice. The mice were divided into two groups. One group was injected with Photofrin II, intravenously (2.5mg/kg body weight). The other group received no Photofrin II. Mice from both groups were irradialed for approximately 15 minutes at 100, 300, or 500 mW/cm2 with the argon (488nm/514.5 nm), dye(628nm) and gold vapor (pulsed 628 nm) laser light. A photosensitizer behaved as an added absorber. Under our experimental conditions, the presence of Photolfrin II increased surface temperature by at least 40% and the temperature rise due to 300 mW/cm2 irradiation exceeded values for hyperthermia. Light and temperature distributions with depth were estimated by a computer model. The model demonstrated the influence of wavelength on the thermal process and proved to be a valuable tool to investigate internal temperature rise. 30536 T00401030536 ^x We investigated the structural geometry of thirty-eight Korean femurs. The purpose of this study is to identify major geometrical differences between Korean femurs 3nd others that we believe belong to Caucasians so that we would be able to get insights into the femoral component design that fits Asians including Koreans. We utilized computerized tomography (CT) images of femurs extracted from cadavers. The CT images were transformed into bitmap data by using a film scanner, and then analyzed by using a commercially available software called Image v.1.0 and a Macintosh IIci computer.The resulting data were compared with already published data. The major results show that the geometry of the Korean femurs is significantly different from that of Caucasians: (1) the anteversion angle and the canal flare index are greater by the amount of approximately 8˚ and 0.5, respectively, (2) the shape of the isthmus cross section is more round, and (3) the distance between the teaser trochanter and the proximal border of the isthmus is shelter by about 15 mm. The results suggested that the femoral component suitable for Asians should be different from the currently-used components designed and manufactured mostly by European or American companies. 30537 T00401030537 ^x It is well known that nonlinear propagation characteristics of the wave in the tissue may give very useful information for the medical diagnoisis. In this paper, a new method to detect nonlinear propagation characteristics of the internal vibration in the tissue for the low frequency mechanical vibration by using bispectral analysis is proposed. In the method, low frequency vibration of f0( = 100Hz) is applied on the surface of the object, and the waveform of the internal vibration x (t) is measured from Doppler frequency modulation of silmultaneously transmitted probing ultrasonic waves. Then, the bispectra of the signal x (t) at the frequencies (f0, f0) and (f0, 2f0) are calculated to estimate the nonlinear propagation characteristics as their magnitude ratio, w here since bispectrum is free from the gaussian additive noise we can get the value with high S/N. Basic experimental system is constructed by using 3.0 MHz probing ultrasonic waves and the several experiments are carried out for some phantoms. Results show the superiority of the proposed method to the conventional method using power spectrum and also its usefulness for the tissue characterization. 30541 T00401030541 ^x This paper describes the implementation of a computerized radial pulse diagnosis by aids of a clinical expert. On this base, we composed of the radial pulse diagnosis system in korean traditional medicine. The system composed of a radial pulse wave detection system and a radial pulse diagnosis system. With a detection system, we detected Inyoung and Cheongu radial pulse wave and processed it. Then, we have got the characteristic parameters of radial pulse wave and also quantified that according to the method of Inyoung-Cheongu Comparison Radial Pulse Diagnosis. We defined the jugement standard of radial pulse diagnosis system and then we confirmed the possibility for realization of automatic radial pulse diagnosis in korean traditional medicine. 30545 T00401030545 ^x Microspheres are expected to be applied to biomedical areas such as solid-phase immunoassays, drug delivery systems, immunomagnetic cell separation. To synthesize microspheres for biomedical application, "two stage shot growth method" was developed. The uniformity ratio of synthesized microspheres was always smaller than 1.05. And the surface charge density (or the number of ionizable functional groups) of the microspheres synthesized by "two stage shot growth method" was 6~13 times higher than that of the microspheres synthesized by conventional seeded batch copolymerization. As a previous step for biomedical application, adsorption experiments of bovine albumin on microspheres were carried out under various conditions. The maximum adsorbed amount was obtained in the neighborhood of pH 4.5. Isoelectric point of bovine albumin is pH 5.0, so experimental result shows that it shifted to acid area. The adsorption isotherm was obtained, the plateau region was always reached at 2.Og/L (bulk concentration of bovine albumin).The effect of the kind and the amount of surface functional group was also examined. 30575 T00401030575 ^x A medical image workstation was developed using multimedia technique. The system based on PC-486DX was designed to acquire medical images produced by medical imaging instruments and related audio information, that is, doctors' reporting results. Input information was processed and analyzed, then the results were presented in the form of graph and animation. All the informations of the system were hierarchically related with the image as the apex. Processing and analysis algorithms were implemented so that the diagnostic accuracy could be improved. The diagnosed information can be transferred for patient diagnosis through LAN(local area network). 30592 T00401030592 ^x In the conventional infrared imaging system, complex infrared lens systems are usually used for directing collimated narrow infrared beams into the high speed 2-dimensional optic scanner. In this paper, a simple reflective infrared optic system with a 2-dimensional optic scanner is proposed for the realization of medical infrared thermography system. It has been experimentally proven that the intfrared thermography system composed of the proposed optic system has the temperature resolution of 0.1˚c under the spatial resolution of lmrad, the image matrix size of 256 X 240, and tile imaging time of 4 seconds. 30593 T00401030593 ^x In this paper, MIIS (Medical Image Information System) has been designed and implemented using INGRES RDBMS, which is based on a client/server architecture. The implemented system allows users to register and retrieve patient information, medical images and diagnostic reports. It also provides the function to display these information on workstation windows simultaneously by using the designed menu-driven graphic user interface. The medical image compression/decompression techniques are implemented and integrated into the medical image database system for the efficient data storage and the fast access through the network. 30594 T00401030594 ^x In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality. 30608 T00401030608 ^x Laboratory information system (LIS) is a key tool to manage laboratory data in clinical pathology. Our department has developed an information system for routine hematology using down-sized computer system. We have used an IBM 486 compatible PC with 16MB main memory, 210 MB hard disk drive, 9 RS-232C port and 24 pin dot printer. The operating system and database management system were SCO UNIX and SCO foxbase, respectively. For program development, we used Xbase language provided by SCO foxbase. The C language was used for interface purpose. To make the system use friendly, pull-down menu was used. The system connected to our hospital information system via application program interface (API), so the information related to patient and request details is automatically transmitted to our computer. Our system interfaced with fwd complete blood count analyzers(Sysmex NE-8000 and Coulter STKS) for unidirectional data tansmission from analyzer to computer. The authors suggests that this system based on down-sized computer could provide a progressive approach to total LIS based on local area network, and the implemented system could serve as a model for other hospital's LIS for routine hematology. 30609 T00401030609 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atelocollagen was produced: The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength. 30618 T00401030618 ^x This paper is a study on the design of adptive filter for QRS complex detection. We propose a simple adaptive algorithm to increase capability of noise cancelation in QRS complex detection with two stage adaptive filter. At the first stage, background noise is removed and at the next stage, only spectrum of QRS complex components is passed. Two adaptive filters can afford to keep track of the changes of both noise and QRS complex. Each adaptive filter consists of prediction error filter and FIR filter The impulse response of FIR filter uses coefficients of prediction error filter. The detection rates for 105 and 108 of MIT/BIH data base were 99.3% and 97.4% respectively. 30619 T00401030619 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed and produced a composite that is consisted of calcium phosphate and collagen. Human umbilical cord origin pepsin treated type I atelocollagen was used as the structural matrix, by which sintered or non-sintered carbonate apatite was encapsulated to form an inorganic-organic composite. With cross linking atelocollagen by UV ray irradiation, the resistance to both compressive and tensile strength was increased. Collagen degradation by the collagenase induced collagenolysis was also decreased. 30620 T00401030620 ^x We have developed a monoleaflet polymer valve as an inexpensive and viable alternative, especially for short-term use in the ventricular assist device or total artificial heart. The frame and leaflet of the polymer valve were made from polyurethane, To evaluate the hemodynamic performance of the polymer valve a comparative study of flow dynamics past a polymer valve and a St. Jude Medical prosthetic valve under physiological pulsatile flow conditions in vitro was made. Comparisons between the valves were made on the transvalvular pressure drop, regurgitation volume and maximum valve opening area. The polymer valve showed smaller regurgitation volume and transvalvular pressure drop compared to the mechanical valve at higher heart rate. The results showed that the functional characteristics of the polymer valve compared favorably with those of the mechanical valve at higher heart rate. 30621 T00401030621 ^x Explosive evaporative removal process of biological tissue by absorption of a CW laser has been simulated by using gelatin and a multimode Nd:YAG laser. Because the point of maximun temperature of laser-irradiated gelatin exists below the surface due to surface cooling, evaporation at the boiling temperature is made explosively from below the surface. The important parameters of this process are the conduction loss to laser power absorption (defined as the conduction-to-laser power parameter, Nk), the convection heat transfer at the surface to conduction loss (defined as Bi), dimensionless extinction coefficient (defined as Br.), and dimensionless irradiation time (defined as Fo). Dependence of Fo on Nk and Bi has been observed by experiment, and the results have been compared with the numerical results obtained by solving a 2-dimensional conduction equation. Fo and explosion depth (from the surface to the point of maximun temperature) are increased when Nk and Bi are increased.To find out the minimum laser power for explosive evaporative removal process, steady state analysis has been also made. The limit of Nk to induce evaporative removal, which is proportional to the inverse of the laser power, has been obtained. 30622 T00401030622 ^x N1 and N2 gross neural action potentials were measured from the round window of the guinea pig cochlea at the onset of the acoustic stimuli. N1-N2 audiograms were made by means of regulating stimulant intensities in order to produce constant N1-N2 potentials as criteria for different input tone pip frequencies. The lowest threshold was measured with an input tone pip I5 dB SPL in intensity and 12 KHz in frequency when the animal was in normal physiological condition. The procedure of experimental measurements is explained in detail. This experimental approach is very useful for the investigation of the Cochlear function. Both noN1inear and active functions of the Cochlea can be monitored by N1-N2 audiograms. 30623 T00401030623 ^x In electrical impedance tomography(EIT), we use boundary current and voltage measurements toprovide the information about the cross-sectional distribution of electrical impedance or resistivity. One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.77 NMR machine. We implemented a resistivity mage reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the mage reconstruction algorithm and furture direction of the research. 30624 T00401030624 ^x A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid eland cells image that was diagnosed as normal and abnormal (two types of abnormal: follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. A9 a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11% was obtained for Thyroid Gland cells. 30625 T00401030625 ^x An electrical stimulator was designed to induce locomotion for paraplegic patients caused by central nervous system injury. Optimal stimulus parameters, which can minimize muscle fatigue and can achieve effective muscle contraction were determined in slow and fast muscles in Sprague-Dawley rats. Stimulus patterns of our stimulator were designed to simulate electromyographic activity monitored during locomotion of normal subjects. Muscle types of the lower extremity were classified according to their mechanical property of contraction, which are slow muscle (msoleus m.) and fast muscle (medial gastrocneminus m., rectus femoris m., vastus lateralis m.). Optimal parameters of electrical stimulation for slow muscles were 20 Hz, 0.2 ms square pulse. For fast muscle, 40 Hz, 0.3 ms square pulse was optimal to produce repeated contraction. Higher stimulus intensity was required when synergistic muscles were stimulated simultaneously than when they were stimulated individually. Electrical stimulation for each muscle was designed to generate bipedal locomotion, so that individual muscles alternate contraction and relaxation to simulate stance and swing phases. Portable electrical stimulator with 16 channels built in microprocessor was constructed and applied to paraplegic patients due to lumbar cord injury. The electrical stimulator restored partially gait function in paraplegic patients. 30626 T00401030626 ^x Two-Dimensional modelling of the Cochlear biomechanics is presented in this paper. The Laplace partial differential equation which represents the fluid mechanics of the Cochlea has been transformed into two-dimensional electrical transmission line. The procedure of this transformation is explained in detail. The comparison between one and two dimensional models is also presented. This electrical modelling of the basilar membrane (BM) is clearly useful for the next approach to the further. Development of active elements which are essential in the producing of the sharp tuning of the BM. This paper shows that two-dimension model is qualitatively better than one-dimensional model both in amplitude and phase responses of the BM displacement. The present model is only for frequency response. However because the model is electrical, the two-dimensional transmission line model can be extended to time response without any difficult. 30627 T00401030627 ^x A method has been proposed for the fully automatic detection of left ventricular endocardial boundary in 2D short axis echocardiogram using geometric model. The procedure has the following three distinct stages. First, the initial center is estimated by the initial center estimation algorithm which is applied to decimated image. Second, the center estimation algorithm is applied to original image and then best-fit elliptic model estimation is processed. Third, best-fit boundary is detected by the cost function which is based on the best-fit elliptic model. The proposed method shows effective result without manual intervention by a human operator. 30628 T00401030628 ^x The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan's method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements. 30638 T00401030638 ^x A new neural network architecture for the recognition of patterns from images is proposed, which is partially based on the results of physiological studies. The proposed network is composed of multi-layers and the nerve cells in each layer are connected by spatial filters which approximate receptive fields in optic nerve fields. In the proposed method, patterns recognition for complicated images is carried out using global features as well as local features such as lines and end-points. A new generating method of matched filers representing global features is proposed in this network. 30659 T00401030659 ^x An implementation scheme of the magnetic nerve stimulator using a switching mode power supply is proposed. By using a switching mode power supply rather than a conventional linear power supply for charging high voltage capacitors, the weight and size of the magnetic nerve stimulator can be considerably reduced. Maximum output voltage of the developed magnetic nerve stimulator using the switching mode power supply is 3, 000 volts and switching time is about 100 msec. Experimental results or human nerve stimulations using the developed stimulator are presented. 30768 T00401030768 ^x In this paper, we describe the design methodology and specifications of the developed module-based bedside monitors for patient monitoring. The bedside monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and SpO2 with Plethysmograph.SpO2 with Plethysmograph.

  • PDF

High Resolution HC$_3$N Observations toward the Central Region of Sagittarius B2

  • H.S-Ching;Oh, M.ishi;M.Morimoto
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
    • /
    • 한국우주과학회 1993년도 한국우주과학회보 제2권2호
    • /
    • pp.17-17
    • /
    • 1993
  • The wall shear stress in the vicinity of end-to end anastomoses under steady flow conditions was measured using a flush-mounted hot-film anemometer(FMHFA) probe. The experimental measurements were in good agreement with numerical results except in flow with low Reynolds numbers. The wall shear stress increased proximal to the anastomosis in flow from the Penrose tubing (simulating an artery) to the PTFE: graft. In flow from the PTFE graft to the Penrose tubing, low wall shear stress was observed distal to the anastomosis. Abnormal distributions of wall shear stress in the vicinity of the anastomosis, resulting from the compliance mismatch between the graft and the host artery, might be an important factor of ANFH formation and the graft failure. The present study suggests a correlation between regions of the low wall shear stress and the development of anastomotic neointimal fibrous hyperplasia(ANPH) in end-to-end anastomoses. 30523 T00401030523 ^x Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70${\pm}$1.32mmHg/min)compared to CF dialyzers(4.32${\pm}$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers. 30527 T00401030527 ^x For quantitative measurement of reflected light from a clinical diagnostic strip, a prototype old reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate reflectance parameters. The strip was illuminated at 45˚c through optical fiber and the intensity of reflected light was determined at rectanguLat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500,550,570 and 610nm) for blood glucose strip. For higher concentration than 300mg/41 about glucose, a saturation state of abforbance was observed at 500,550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm. 30535 T00401030535 ^x Radiation-induced fibrosarcoma tumors were grown on the flanks of C3H mice. The mice were divided into two groups. One group was injected with Photofrin II, intravenously (2.5mg/kg body weight). The other group received no Photofrin II. Mice from both groups were irradialed for approximately 15 minutes at 100,300, or 500 mW/cm2 with the argon (488nm/514.5 nm), dye(628nm) and gold vapor (pulsed 628 nm) laser light. A photosensitizer behaved as an added absorber. Under our experimental conditions, the presence of Photolfrin II increased surface temperature by at least 40% and the temperature rise due to 300 mW/cm2 irradiation exceeded values for hyperthermia. Light and temperature distributions with depth were estimated by a computer model. The model demonstrated the influence of wavelength on the thermal process and proved to be a valuable tool to investigate internal temperature rise. 30536 T00401030536 ^x We investigated the structural geometry of thirty-eight Korean femurs. The purpose of this study is to identify major geometrical differences between Korean femurs 3nd others that we believe belong to Caucasians so that we would be able to get insights into the femoral component design that fits Asians including Koreans. We utilized computerized tomography (CT) images of femurs extracted from cadavers. The CT images were transformed into bitmap data by using a film scanner, and then analyzed by using a commercially available software called Image v.1.0 and a Macintosh IIci computer.The resulting data were compared with already published data. The major results show that the geometry of the Korean femurs is significantly different from that of Caucasians: (1) the anteversion angle and the canal flare index are greater by the amount of approximately 8˚ and 0.5, respectively, (2) the shape of the isthmus cross section is more round, and (3) the distance between the teaser trochanter and the proximal border of the isthmus is shelter by about 15 mm. The results suggested that the femoral component suitable for Asians should be different from the currently-used components designed and manufactured mostly by European or American companies. 30537 T00401030537 ^x It is well known that nonlinear propagation characteristics of the wave in the tissue may give very useful information for the medical diagnoisis. In this paper, a new method to detect nonlinear propagation characteristics of the internal vibration in the tissue for the low frequency mechanical vibration by using bispectral analysis is proposed. In the method, low frequency vibration of f0( = 100Hz) is applied on the surface of the object, and the waveform of the internal vibration x (t) is measured from Doppler frequency modulation of silmultaneously transmitted probing ultrasonic waves. Then, the bispectra of the signal x (t) at the frequencies (f0, f0) and (f0, 2f0) are calculated to estimate the nonlinear propagation characteristics as their magnitude ratio, w here since bispectrum is free from the gaussian additive noise we can get the value with high S/N. Basic experimental system is constructed by using 3.0 MHz probing ultrasonic waves and the several experiments are carried out for some phantoms. Results show the superiority of the proposed method to the conventional method using power spectrum and also its usefulness for the tissue characterization. 30541 T00401030541 ^x This paper describes the implementation of a computerized radial pulse diagnosis by aids of a clinical expert. On this base, we composed of the radial pulse diagnosis system in korean traditional medicine. The system composed of a radial pulse wave detection system and a radial pulse diagnosis system. With a detection system, we detected Inyoung and Cheongu radial pulse wave and processed it. Then, we have got the characteristic parameters of radial pulse wave and also quantified that according to the method of Inyoung-Cheongu Comparison Radial Pulse Diagnosis. We defined the jugement standard of radial pulse diagnosis system and then we confirmed the possibility for realization of automatic radial pulse diagnosis in korean traditional medicine. 30545 T00401030545 ^x Microspheres are expected to be applied to biomedical areas such as solid-phase immunoassays, drug delivery systems, immunomagnetic cell separation. To synthesize microspheres for biomedical application, "two stage shot growth method" was developed. The uniformity ratio of synthesized microspheres was always smaller than 1.05. And the surface charge density (or the number of ionizable functional groups) of the microspheres synthesized by "two stage shot growth method" was 6~13 times higher than that of the microspheres synthesized by conventional seeded batch copolymerization. As a previous step for biomedical application, adsorption experiments of bovine albumin on microspheres were carried out under various conditions. The maximum adsorbed amount was obtained in the neighborhood of pH 4.5. Isoelectric point of bovine albumin is pH 5.0, so experimental result shows that it shifted to acid area. The adsorption isotherm was obtained, the plateau region was always reached at 2.Og/L (bulk concentration of bovine albumin).The effect of the kind and the amount of surface functional group was also examined. 30575 T00401030575 ^x A medical image workstation was developed using multimedia technique. The system based on PC-486DX was designed to acquire medical images produced by medical imaging instruments and related audio information, that is, doctors' reporting results. Input information was processed and analyzed, then the results were presented in the form of graph and animation. All the informations of the system were hierarchically related with the image as the apex. Processing and analysis algorithms were implemented so that the diagnostic accuracy could be improved. The diagnosed information can be transferred for patient diagnosis through LAN(local area network). 30592 T00401030592 ^x In the conventional infrared imaging system, complex infrared lens systems are usually used for directing collimated narrow infrared beams into the high speed 2-dimensional optic scanner. In this paper, a simple reflective infrared optic system with a 2-dimensional optic scanner is proposed for the realization of medical infrared thermography system. It has been experimentally proven that the intfrared thermography system composed of the proposed optic system has the temperature resolution of 0.1˚c under the spatial resolution of lmrad, the image matrix size of 256 X 240, and tile imaging time of 4 seconds. 30593 T00401030593 ^x In this paper, MIIS (Medical Image Information System) has been designed and implemented using INGRES RDBMS, which is based on a client/server architecture. The implemented system allows users to register and retrieve patient information, medical images and diagnostic reports. It also provides the function to display these information on workstation windows simultaneously by using the designed menu-driven graphic user interface. The medical image compression/decompression techniques are implemented and integrated into the medical image database system for the efficient data storage and the fast access through the network. 30594 T00401030594 ^x In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality. 30608 T00401030608 ^x Laboratory information system (LIS) is a key tool to manage laboratory data in clinical pathology. Our department has developed an information system for routine hematology using down-sized computer system. We have used an IBM 486 compatible PC with 16MB main memory, 210 MB hard disk drive, 9 RS-232C port and 24 pin dot printer. The operating system and database management system were SCO UNIX and SCO foxbase, respectively. For program development, we used Xbase language provided by SCO foxbase. The C language was used for interface purpose. To make the system use friendly, pull-down menu was used. The system connected to our hospital information system via application program interface (API), so the information related to patient and request details is automatically transmitted to our computer. Our system interfaced with fwd complete blood count analyzers(Sysmex NE-8000 and Coulter STKS) for unidirectional data tansmission from analyzer to computer. The authors suggests that this system based on down-sized computer could provide a progressive approach to total LIS based on local area network, and the implemented system could serve as a model for other hospital's LIS for routine hematology. 30609 T00401030609 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atelocollagen was produced: The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength. 30618 T00401030618 ^x This paper is a study on the design of adptive filter for QRS complex detection. We propose a simple adaptive algorithm to increase capability of noise cancelation in QRS complex detection with two stage adaptive filter. At the first stage, background noise is removed and at the next stage, only spectrum of QRS complex components is passed. Two adaptive filters can afford to keep track of the changes of both noise and QRS complex. Each adaptive filter consists of prediction error filter and FIR filter The impulse response of FIR filter uses coefficients of prediction error filter. The detection rates for 105 and 108 of MIT/BIH data base were 99.3% and 97.4% respectively. 30619 T00401030619 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed and produced a composite that is consisted of calcium phosphate and collagen. Human umbilical cord origin pepsin treated type I atelocollagen was used as the structural matrix, by which sintered or non-sintered carbonate apatite was encapsulated to form an inorganic-organic composite. With cross linking atelocollagen by UV ray irradiation, the resistance to both compressive and tensile strength was increased. Collagen degradation by the collagenase induced collagenolysis was also decreased. 30620 T00401030620 ^x We have developed a monoleaflet polymer valve as an inexpensive and viable alternative, especially for short-term use in the ventricular assist device or total artificial heart. The frame and leaflet of the polymer valve were made from polyurethane, To evaluate the hemodynamic performance of the polymer valve a comparative study of flow dynamics past a polymer valve and a St. Jude Medical prosthetic valve under physiological pulsatile flow conditions in vitro was made. Comparisons between the valves were made on the transvalvular pressure drop, regurgitation volume and maximum valve opening area. The polymer valve showed smaller regurgitation volume and transvalvular pressure drop compared to the mechanical valve at higher heart rate. The results showed that the functional characteristics of the polymer valve compared favorably with those of the mechanical valve at higher heart rate. 30621 T00401030621 ^x Explosive evaporative removal process of biological tissue by absorption of a CW laser has been simulated by using gelatin and a multimode Nd:YAG laser. Because the point of maximun temperature of laser-irradiated gelatin exists below the surface due to surface cooling, evaporation at the boiling temperature is made explosively from below the surface. The important parameters of this process are the conduction loss to laser power absorption (defined as the conduction-to-laser power parameter, Nk), the convection heat transfer at the surface to conduction loss (defined as Bi), dimensionless extinction coefficient (defined as Br.), and dimensionless irradiation time (defined as Fo). Dependence of Fo on Nk and Bi has been observed by experiment, and the results have been compared with the numerical results obtained by solving a 2-dimensional conduction equation. Fo and explosion depth (from the surface to the point of maximun temperature) are increased when Nk and Bi are increased.To find out the minimum laser power for explosive evaporative removal process, steady state analysis has been also made. The limit of Nk to induce evaporative removal, which is proportional to the inverse of the laser power, has been obtained. 30622 T00401030622 ^x N1 and N2 gross neural action potentials were measured from the round window of the guinea pig cochlea at the onset of the acoustic stimuli. N1-N2 audiograms were made by means of regulating stimulant intensities in order to produce constant N1-N2 potentials as criteria for different input tone pip frequencies. The lowest threshold was measured with an input tone pip I5 dB SPL in intensity and 12 KHz in frequency when the animal was in normal physiological condition. The procedure of experimental measurements is explained in detail. This experimental approach is very useful for the investigation of the Cochlear function. Both noN1inear and active functions of the Cochlea can be monitored by N1-N2 audiograms. 30623 T00401030623 ^x In electrical impedance tomography(EIT), we use boundary current and voltage measurements toprovide the information about the cross-sectional distribution of electrical impedance or resistivity. One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.77 NMR machine. We implemented a resistivity mage reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the mage reconstruction algorithm and furture direction of the research. 30624 T00401030624 ^x A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid eland cells image that was diagnosed as normal and abnormal (two types of abnormal: follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. A9 a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11% was obtained for Thyroid Gland cells. 30625 T00401030625 ^x An electrical stimulator was designed to induce locomotion for paraplegic patients caused by central nervous system injury. Optimal stimulus parameters, which can minimize muscle fatigue and can achieve effective muscle contraction were determined in slow and fast muscles in Sprague-Dawley rats. Stimulus patterns of our stimulator were designed to simulate electromyographic activity monitored during locomotion of normal subjects. Muscle types of the lower extremity were classified according to their mechanical property of contraction, which are slow muscle (msoleus m.) and fast muscle (medial gastrocneminus m., rectus femoris m., vastus lateralis m.). Optimal parameters of electrical stimulation for slow muscles were 20 Hz, 0.2 ms square pulse. For fast muscle, 40 Hz, 0.3 ms square pulse was optimal to produce repeated contraction. Higher stimulus intensity was required when synergistic muscles were stimulated simultaneously than when they were stimulated individually. Electrical stimulation for each muscle was designed to generate bipedal locomotion, so that individual muscles alternate contraction and relaxation to simulate stance and swing phases. Portable electrical stimulator with 16 channels built in microprocessor was constructed and applied to paraplegic patients due to lumbar cord injury. The electrical stimulator restored partially gait function in paraplegic patients. 30626 T00401030626 ^x Two-Dimensional modelling of the Cochlear biomechanics is presented in this paper. The Laplace partial differential equation which represents the fluid mechanics of the Cochlea has been transformed into two-dimensional electrical transmission line. The procedure of this transformation is explained in detail. The comparison between one and two dimensional models is also presented. This electrical modelling of the basilar membrane (BM) is clearly useful for the next approach to the further. Development of active elements which are essential in the producing of the sharp tuning of the BM. This paper shows that two-dimension model is qualitatively better than one-dimensional model both in amplitude and phase responses of the BM displacement. The present model is only for frequency response. However because the model is electrical, the two-dimensional transmission line model can be extended to time response without any difficult. 30627 T00401030627 ^x A method has been proposed for the fully automatic detection of left ventricular endocardial boundary in 2D short axis echocardiogram using geometric model. The procedure has the following three distinct stages. First, the initial center is estimated by the initial center estimation algorithm which is applied to decimated image. Second, the center estimation algorithm is applied to original image and then best-fit elliptic model estimation is processed. Third, best-fit boundary is detected by the cost function which is based on the best-fit elliptic model. The proposed method shows effective result without manual intervention by a human operator. 30628 T00401030628 ^x The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan's method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements. 30638 T00401030638 ^x A new neural network architecture for the recognition of patterns from images is proposed, which is partially based on the results of physiological studies. The proposed network is composed of multi-layers and the nerve cells in each layer are connected by spatial filters which approximate receptive fields in optic nerve fields. In the proposed method, patterns recognition for complicated images is carried out using global features as well as local features such as lines and end-points. A new generating method of matched filers representing global features is proposed in this network. 30659 T00401030659 ^x An implementation scheme of the magnetic nerve stimulator using a switching mode power supply is proposed. By using a switching mode power supply rather than a conventional linear power supply for charging high voltage capacitors, the weight and size of the magnetic nerve stimulator can be considerably reduced. Maximum output voltage of the developed magnetic nerve stimulator using the switching mode power supply is 3,000 volts and switching time is about 100 msec. Experimental results or human nerve stimulations using the developed stimulator are presented. 30768 T00401030768 ^x In this paper, we describe the design methodology and specifications of the developed module-based bedside monitors for patient monitoring. The bedside monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and SpO2 with Plethysmograph.

  • PDF