• Title/Summary/Keyword: Science etc.

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기술 수준조사 및 분석을 통한 SAR(합성개구면 레이다) 핵심기술 개발방안 연구 (A Study for Development Plan of SAR Core Technology Through Technology Readiness Level Survey and Analysis)

  • 곽준영;정대권
    • 한국군사과학기술학회지
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    • 제14권4호
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    • pp.655-662
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    • 2011
  • SAR(Synthetic Aperture Radar) has the ability to generate high resolution images regardless of a weather condition(e.g. visibility good or poor and day or night, etc.). SAR is considered as one of the most important powers and needs for the future since it has been utilized in a number of important military fields such as early warning, urban defense, missile guidance system, etc. Additionally there are many civilian demands and applications in aviation, traffic control, earth and space explorations, weather forecast etc. This days, the ability to acquire and analyze information is needed to cope with the urgency of global politics and international changes. In this paper, technical survey and development review for SAR systems are investigated to derive the core and immature technologies of domestic defense industry.

Robust Image Similarity Measurement based on MR Physical Information

  • Eun, Sung-Jong;Jung, Eun-Young;Park, Dong Kyun;Whangbo, Taeg-Keun
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제11권9호
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    • pp.4461-4475
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    • 2017
  • Recently, introduction of the hospital information system has remarkably improved the efficiency of health care services within hospitals. Due to improvement of the hospital information system, the issue of integration of medical information has emerged, and attempts to achieve it have been made. However, as a preceding step for integration of medical information, the problem of searching the same patient should be solved first, and studies on patient identification algorithm are required. As a typical case, similarity can be calculated through MPI (Master Patient Index) module, by comparing various fields such as patient's basic information and treatment information, etc. but it has many problems including the language system not suitable to Korean, estimation of an optimal weight by field, etc. This paper proposes a method searching the same patient using MRI information besides patient's field information as a supplementary method to increase the accuracy of matching algorithm such as MPI, etc. Unlike existing methods only using image information, upon identifying a patient, a highest weight was given to physical information of medical image and set as an unchangeable unique value, and as a result a high accuracy was detected. We aim to use the similarity measurement result as secondary measures in identifying a patient in the future.

자원식물의 이용현황과 전망 - 기능성 정유성분을 중심으로 -

  • 정해곤;방진기;성낙술;김성민;류수노
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2003년도 춘계 학술대회지
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    • pp.10-16
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    • 2003
  • Natural resource plants have been useful and helpful materials for human to against diseases and Prevention since ancient Egyptian and Roman times. However, according to recent survey, its habitat and indigenous are continuously decreased and almost extinct some valuable species, as Adonis vernalis, Digitalis lanata etc., especially in Eastern Europe and east Asian countries due to radical political and social reforms. ESCOP and FAO have already initiated to protect the endangered species for conservation, protection and propagation technology but it is not easy tasks without global concerning. Most natural resource plants have volatile components in essential oils and its consumption and demanding is increased every year, which contained certain compounds have no side effects and good properties for biological activities. Essential oils of natural resource plants are also well known for medical purposes, such as Central Nervous System (CNS, linalool), anticancer (d-limonene, perillyl alcohol, etc.), microbial and fungicidal activities (menthol, borneol, etc). Essential oil also used for natural therapy to prevent and increase immune systems instead of chemical synthesis drugs. With this, researchers of natural resource plants are ultimately faced to develop and optimal technology for increasing the Korean farmer's income by high added-value herbal products in present and future.

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Simulation for Irrigation Management of Corn in South Texas

  • Ko, Jong-Han;Piccinni, Giovanni
    • 한국작물학회지
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    • 제53권2호
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    • pp.161-170
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    • 2008
  • Interest is growing in applying simulation models for the South Texas conditions, to better assess crop water use and production with different crop management practices. The Environmental Policy Integrated Climate (EPIC) model was used to evaluate its application as a decision support tool for irrigation management of com (Zea mays L.) in South Texas of the U.S. We measured actual crop evapotranspiration (ETc) using a weighing lysimeter, soil moisture using a neutron probe, and grain yield by field sampling. The model was then validated using the measured data. Simulated ETc using the Hargreaves-Samani equation was in agreement with the lysimeter measured ETc. Simulated soil moisture generally matched with the measured soil moisture. The EPIC model simulated the variability in grain yield with different irrigation regimes with $r^2$value of 0.69 and root mean square error of $0.5\;ton\;ha^{-1}$. Simulation results with farm data demonstrate that EPIC can be used as a decision support tool for com under irrigated conditions in South Texas. EPIC appears to be effective in making long term and pre-season decisions for irrigation management of crops, while reference ET and phenologically based crop coefficients can be used for inseason irrigation management.

Acid Dairy Drink Induced by Pectin -on Stabilization Mechanism and Effective Use of Pectin- on Stabilization Mechanism and Effective Use of Pectin-

  • Kim, iaki-Abe
    • 한국축산식품학회:학술대회논문집
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    • 한국축산식품학회 2002년도 정기총회 및 제29차 춘계국제 학술발표대회
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    • pp.82-89
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    • 2002
  • Acid dairy drinks(ADD) are a worldwide product existing in many variations: fruit milk drinks, yogurt drinks, soy milk, butter milk, whey drinks and kefir etc. These drinks are marketed with different shelf lives depending on processing: -Short shelf life(maximum 3 weeks, cold storage) - Long shelf life(2 to 9 months, pasteurized, sterilized or retorted) Acidic protein drinks tend to a separation or destabilization process in the absence of stabilizing system during the shelf life of the ADD. A phase separation results in sedimentation of large particles at the bottom of the package and/or the formation of a serum layer at the top(whey off). These beverages are usually composed of an acid dairy phase (fermented base)or a natural base(milk, soymilk etc.)with an acidic medium (fruit phase: pulp, fruit concentrate etc.) which can be flavored. Sugar and stabilizers are added. It has been proved since the late 1950's that adding high methoxy pectin (HM pectin)to acid milk drinks is the best way to prevent the formation of a sediment and/or the whey off. In this presentation, we explain about stabilization mechanism of ADD induced by pectin. Applications and market trend of ADD in Asia and Europe are explained.

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농촌 주거지역 쓰레기소각으로 인한 산불화재 개선방안에 관한 연구 (A Study on the Improvement Method of Forest Fire Caused by Waste Incineration at the Farming Residential Area)

  • 이영삼
    • 대한안전경영과학회지
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    • 제18권3호
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    • pp.9-15
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    • 2016
  • Currently the forest area is 6,370,000 hectare (ha) which occupies 63.7% in Korea. The forest has good functions such as production of forest products, conservation of national land, prevention of disasters, etc. However constructing houses near the forest area make bad situation like illegal waste incineration by resident. So research subject is forest fire caused by waste incineration place including facility. And this study was conducted about statistical analysis and research analysis of the 100 waste incineration places including facilities at the country town. Statistical analysis shows that March is 27% which percentage is the highest number of forest fire in 10 years' average. The number of forest fire caused by waste incineration is 45 which is the third highest number in the fire statistic. The distance between waste incineration place including facility and forest area is 30m, 40m and 50m. That 40m (36%) is the most common distance from forest area. The types of waste incineration are ground (62%), the temporary facility made with oil drum can (35%) and other made with steel sheet, concrete, etc. The result of this study is that government and local government must conduct the improvement measure to reduce illegal incineration such as waste pickup area made with rain and wind proof type installed near residence, expenses for waste treatment, enlightenment and training, etc. Also considering their age and income are needed for realistic improvement.

Environmental Management by Using Weedy Plants

  • Oki, Yoko
    • 한국잡초학회지
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    • 제18권2호
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    • pp.95-105
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    • 1998
  • The positive functions of aquatic and terrestrial weedy plants were reviewed in terms of water purification, soil erosion prevention, salt-affected soil utilization, etc.. Introduced were several examples to utilize weedy plants for environment management by exploiting their positive functions.

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알레르기性 鼻炎에 對한 文獻的 考察 (The Bibliogrphical Study on the Allergic Rhinitis)

  • 김현아;정지천
    • 한방안이비인후피부과학회지
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    • 제7권1호
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    • pp.53-84
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    • 1994
  • The study has been carried out to investigate of the Allergic Rhinitis by referring to 87 literatures. The results were as follows; 1. In oriental medical science, Allergic Rhinitis is belong to the category of the 'BiGu'(鼻구) 'GuChe'(구체). The 'Gu'(구) of the BiGu means watery rhinorrhea, the 'Che'(체) of the GuChe means sneezing. 2. The cause of a disease summarize the weak of Lung, Spleen and Kidney, and invasion into the nasal cavity of PoongHan etc a wrong air. Sometimes the pathologial change appear PoongHan changeHwa(風寒化火), HwaYeol is hidden in the inside(火熱內伏). The contributing factors are found a season(spring, winter), an abnormal weather(運氣 : 少陰 少陽 陽明 司天, 歲金不及), an emotional stress, an external wound of the harmful air, a food allergens and fatigue, a contact of substances, a sunlight etc. 3. Predominant symptoms are watery rhinorrhea, sneezing and nasal obstruction. Sometimes accompanic symptoms are nasal bleeding, mucopurulent rhinorrhea, olfactory disturbance, nasal polyp, rhinolalia clausa, respiratory disfunction etc. 4. The treatment-methodes is as follows, OnBoPaeJang GeoPoongSanHan(溫補肺臟 祛風散寒), GeonBilkGi(健脾益氣), BoSinNabGi (補腎納氣). The treatmentherbs is as follows, OnBoJiLuDan GaGam(溫補止流丹 加減), OkByeongPoongSan plus ChangIJaSan GaGam(玉屛風散合 蒼耳子散 加減), BoJungIkGiTang GaGam plus SoCheongLyongTang(補中益氣湯加減 配合 小靑龍湯), SinGiHwan GaGam(腎氣丸加減), GaeJiTang(桂枝湯) etc. 5. The external treatment is as follows, JeokBi(滴鼻), ChuiBi(吹鼻), SaekBi(塞鼻), stick and herbs-injection on the acupuncture-point, pressure ear acupuncture-point, herbs-pillow etc. 6. The acupuncture-moxa treatment is as follows, the methodes of cure apply TongJoGyeongGi(通調經氣), SanTongBiGui(宣通鼻竅) etc. Predominent acupuncture-points are YoungHyang(迎香), InDang(印堂), BiTong(鼻通), SangSeong(上星), HabGok(合谷) and so on. As mentioned above, from now on, it's need to the oriental medical scientific study of the Immunity and Allergy and to the external treatment's application for the ascent of the treatment-effect of the allergic disease.

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회문산 일대의 관속식물 분포 특성 (Distribution Characteristics of Vascular Plants in the Mt. Hoemun)

  • 오현경;변무섭
    • 한국환경복원기술학회지
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    • 제12권1호
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    • pp.101-110
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    • 2009
  • The vascular plants in the Mt. Hoemun were listed 541 taxa composed of 113 families, 354 genera, 473 species, 1 subspecies, 64 varieties and 3 forms. Divided into 541 taxa; woody plants were 151 taxa (27.9%) and herbaceous plants were 390 taxa (72.1%). Based on the list of rare plants by the Korea Forest Service, 10 taxa were recorded in the studied areas; Lilium distichum (Preservation priority order: No. 159), Lilium callosum (No. 191), Tricyrtis dilatata (No. 97), Iris ensata var. sponianea (No. 197), Gastrodia elata (No.9), Aristolochia contorta (No. 151), Paeonia obovata (No. 30: Legal protection species), Prunus yedoensis (No. 110 : Planted species), Viola albida (No. 202), Schpolia japonica (No. 208). Based on the list of Korean endemic plants, 15 taxa were recorded; Cephalotaxus koreana, Lilium amabile, Salix purpurea var. japonica, Pseudostellaria multiflora, Aconitum pseudolaeve var. erectum, Filipendula glaberrima, Weigela subsessilis, etc. Based on the list of approved for delivering overseas of plants, 10 taxa were recorded; Carex okamotoi, Lilium distichum, Clematis trichotoma, Vaccinium oldhami, Paulownia coreana, Asperula lasiantha; etc. Specific plant species by floral region were total 4S taxa (8.3% of all 541 taxa of vascular plants); Gastrodia elata, Paeonia obovata in class V, Carex arenicola, Corydalis grandicalyx in class IV, 5 taxa (Spiraea salicifolia, Schpolia japonica, Asperula lasiantha, etc.) in class III, 7 taxa (Lilium distichum, Iris ensata var. spontanea, Caryopteris incana, etc.) in class II and 28 taxa (Camptosorus sibiricus, Orixa japonica, Lonicera praeflorens, etc.) in class I. The naturalized plants in the surveyed sites were 13 families, 38 genera, 43 species, 2 varieties, 45 taxa (Phleum pratense, Medicago sativa, Sonchus asper, etc.) and naturalization rate was 8.3% of all 541 taxa of vascular plants. Ambrosia artemisiifolia var. elatior an ecosystem disturbing wild plants have been increasing. Therefore, the counter plants for continuous control and conservation are needed on the ecosystem of Mt. Hoemun.

Introduction to IEC Standardization for Superconducting Sensors and Detectors

  • Ohkubo, M.
    • Progress in Superconductivity
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    • 제14권2호
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    • pp.106-109
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    • 2012
  • Superconducting sensors and detectors have been applied to many fields or beginning to enter the maturing stage. The applications spread over a wide range of fields such as radio telescope, medical examination, quantum information, contamination inspection, materials analysis, etc. For users of the superconducting devices as well as developers, we have to avoid confusion of naming, graphical circuit symbols, and measurement methods for device performance. We are trying to formulate international standards under the International Electrotechnical Commission - Technical Committee 90 (IEC-TC90), which is responsible for superconductivity. The sensors and detectors to be considered are divided into two groups: coherent sensors (SQUID, SIS mixers, etc.) and direct detectors (TES, STJ, MKID, SSPD, etc.).