• 대한본초학회지
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• 제30권5호
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• pp.1-6
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• 2015

Objectives : Vertigo is a sensation of spinning while stationary. It is commonly associated with nausea or vomiting, unsteadiness (postural instability), falls. It can affect a person's thoughts and life style. Recurrent episodes in those with vertigo are common and frequently impair the quality of life. The purpose of this study was to report the clinical effects of herbal medicine on vertigo.Methods : We employed oriental medical treatments; herbal-medication (Banhabaekchulcheonma-tang gamibang), acupuncture and moxibustion. At the same time, the blood cupping therapy in the neck area was applied. We treated the patients two or three times a week with oriental therapy methods. They took medicine three times a day after a meal. During taking medicine, we let the patients avoid fatty food, flour based food, and alcohol. We determined the course of treatment with visual analogue scale (VAS). We let them respond to a VAS item between 0 and 10 point continuously. The symptoms that we evaluated were vertigo, headache, chest discomfort, nausea and vomiting.Results : After taking treatment - acupuncture and moxibustion during some period and taking herbal-medicine, the VAS scale was gradually getting decreased. Generally the symptom of vomitting and nausea was eased at first, and then the symptom of chest discomfort, headache, vertigo was relieved.Conclusions : Banhabaekchulcheonma-tang gamibang was effective in the treatment of vertigo and its related symptoms, headache, chest discomfort, nausea and vomiting.

• The Korean Journal of Ecology
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• 제19권5호
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• pp.431-451
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• 1996

The present studwas undertaken to classify and describe the riverside vegetation around Hanchon (36°27’-36°51’N, 128°15’-128°37’E), a tributary in the upper stream area of Nak-tong River, South Korea by methods of the ZM school of phytosociology. As a result the vegetation was divided into twenty three associations and communities belonging to ten classes. Reflecting various human impacts in the past, the associations and communities of the Artemisietea principis were most plentiful there. The vegetation units obtained in the present study were as follows: A. forest vegetation A-1 Fagetea crenatae:Zelkova serrata community, Larix leptolepis community; B. Shrub vegetation B-1 Salicetea sachalinensis:Salicetum gracilistylae, Salicetum graciliglandis assoc. nov., B-2 Rosetea sachalinensis:Salicetum gracilistylae, Salicetum graciliglandis assoc. nov., B-2 Rosetea multiflorae:Stephanandra incisa community, Lycium chinense community; C. Grassland vegetation C-1 Lemnetea minoris:Spirodela polyrhiza-Lemna paucicostata community, C-2 Bidentetea tripartiti:Polygonetum thunbergii, Polygonetum sieboldii-hydropiperis, Panico Polygonetum hydropiperis, Pharagmitetea :Oenantho- Phalaridetum arundinaceae, Phragmitetum japonicae, Miscanthetum sacchariflori, Phragmites australis community, C-4 Artemisietea principis:Artemisia princeps community, Impatiens textori community, Lactuco indicae-Humuletum japonicae, Pueraria lobata-Humulus japonicus community, Pennisetum alopecuroides community, C-5 chenopodietea:Echinochloa crus-galli var. orizicola community, Digitaria adsecendens community, Polygonum nodosum community, C-6 Miscanthetea sinensis: Miscanthus sinensis community, C-7 Plantaginetea:Eragrotis multicaulis-Plantago asiatica community. It is inferred that the endemic vegetation units in the riverside vegetation of Korea are very rare, because most of the vegetation units obtained in the present study are common with those of Japan. Among the above vegetation units, the Salicetum graciliglandis was established as a new association. On the other hand, the associations and communities of classes characterizing the riverside vegetation increased with a decrease of human impacts from the downstream to the upstream in Hanchon, while the number of the naturalized plants was the reverse. Also based on the present phytosociological work, the relation between the vegetation units and their environmental conditions and the restoration ecology and nature conservation of the riverside vegetation were discussed here in detail.

• 한국수자원학회논문집
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• 제41권7호
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• pp.737-746
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• 2008

강우-유출 및 저수지운영 모형의 최종 개발 목적은 가용한 관측자료를 이용하여 실무자가 하천의 유량예측 및 저수지운영 업무를 쉽고 정확하게 수행할 수 있도록 분석도구를 제공하는데 있다. 본 연구에서는 물관리 실무에서 홍수량 예측업무에 활용중인 단기 강우-유출 저류함수 모형을 확장하여 장기유출에 모의에 기여도가 높은 유효우량 및 침투량 산정기법을 개선하여 장기 유출분석이 가능하도록 저류함수기반의 장기 유출모형을 구축하였다. 개발된 모형의 적용가능성을 검토하기 위하여 낙동강 유역내 3개 댐유역(안동,합천,밀양)을 대상으로 연간 유출모의를 실시 하였으며, 현재 물관리 실무에서 장기유출모형으로 활용중인 SSARR모형과의 성능을 비교하였다. 수문곡선 비교 결과, SSARR 모형이 상대적으로 재현성 높은 결과를 보여주었지만, 본 연구에서 개발한 모형은 관측 가용한 자료만으로도 비교적 신뢰성 있는 장기유출모의가 가능하다는 점에서 향후 실무에서 유용하게 활용할 수 있을 것으로 사료된다.

• 한국조경학회지
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• 제30권4호
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• pp.92-104
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• 2002

This study investigates, analyzes, and summarizes Dansplantation techniques and methods through practical methodology centering on fieldwork in order to present effective planting methods for large trees that have important significance. The conclusions are as follows : 1. The transplantation process of a large tree generally consists of the stages of digging up a tree, manufacturing a carrier frame, loading the tee on a vehicle, transporting, transplanting the tree, installing a strut and maintaining and managing the new transplant. In addition, planting a tree on a mounted place includes the primary procedures of trimming out the root, and preparing for transplanting the tree on a mounted place, as well as the secondary work of trimming out the root, transplanting a tree on a mounted place, maintenance and management. 2. In order to decide on a transplantation method for a large-sized tree, a structure calculation has to be performed first. That is, one must calculate the weight of the tree and the allowable stress of the strut (H-beam, etc.) fhst and then decide on the upper method through computer modeling based upon this structural calculation. 3. As a result of the analysis of a transplanted tree using the life soil method, it was confirmed that large quantities of feeder roots had developed around the root within a short time after the transplantation. The life soil method has proven to be very effective for transplantation of large-sized trees. 4. As for the production method of an H-beam strut frame, it was found that the manufacturing process and disassembly process were simple and proper; therefore, the H-beam frame is an appropriate structure to be used in the transplantation of large trees. 5. The concavo-convex method, which consists of filling the life soil in the concavo-convex area around the root, was found to be a method that promotes the growth of feeder roots within a short period of time and saves the supply of water at the same time.

• 비파괴검사학회지
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• 제25권5호
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• pp.362-367
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• 2005

후방복사된 초음파의 입사각 의존성(프로파일)은 입사지역이 다층경계이거나 깊이방향으로 물성변화가 있을 때 주파수 의존적이다. 지금까지 측정된 후방복사 프로파일은 주로 사용된 탐촉자의 중심 주파수의 특성에 의존하여 표면탄성파의 전반적인 주파수 의존 특성을 이해하는 데는 어려움이 많았다. 디지털 오실로스코프의 DFP(digital filter package)를 이용하여 주파수 대역별 후방복사 프로파일이 실시간 획득되었다. #1200 사포로 표면 처리된 상업적 강재 시편에 대한 주파수 대역별 측정으로부터 표면탄성파가 2% 정도의 음의 기울기(loaded case) 속도 분산성이 있음을 알았고 심하게 녹이 쓴 시편에서는 주파수 대역별로 프로파일의 형태에 큰 변화를 보였다. 주파수 대역별 후방복사 프로파일은 분산성을 가진 표면지역에 대한 비파괴적 평가에 매우 유용할 것으로 본다.

• 한국환경과학회지
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• 제6권6호
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• pp.563-578
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• 1997

The purpose of this study is to suggest the estimation model of' amenity environment' by Perceived Envionmental Quality Index(PEQI) model. A questionnaire survey was carried out for 연e study area of Taegu-Kyungbuk region. Sampling size was 838(427 of Taegu and 411 of Kyungbuk residents by stratified sampling of each region's(7 Gu for Tae-gu, 7 Cities 61 Gun far Kyungbuk) population. The survey was done during Sep. to Nov, of 1996. The suggested model was composed of four estimation categories and 16 Indicators. The four categories were 'Cleanness 61 Quietness', 'Naturalness & Harmony', 'Beauty 61 Comfort' and 'Environmental Conservation Efforts'. And each category has several individual Indicators. The weighted means of satisfaction were different by each region. Suseong-gu, Dalseogu, Joong-gu(Taegu), Bumcheon, Andong, and Cheondo(Kyungbuk) showed high enoronmental satisfaction, but Dong-gu. Seo-gu(taegu), Youngcheon, and Pohang(Kyungbuk) showed lower environmental satisfaction. By Analytic Hierarchy Process(AHP) of weighting values for each categorirs, 'Enoronmental Conservation Efforts' was estimated as the most Important(value of 0.367), and 'Naturalness 61 Harmony'(0. 242),'Clenness & guletness'(0.225), and 'Beauty & Comfort'(0.166) were Important respectively. Total PEQI's were estimated as 48.0 for Taegu, and 53.3 for Kyungbuk. PEQI's for each regions were between 46.2(Dong-gu) and 59.9(Kimcheon). The validity of the suggested model was verined by factor analysis. The four factors were identnied as the same categories and indicators. Finally, The LISREL+7 model was suggested as estimauon model of 'Amenity Environment' for Taegu-Kyungbuk region.

• 지질공학
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• 제19권2호
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• pp.205-215
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• 2009

지표하 다공성매체에서 비정상상태의 유동을 해석하기 위한 종래의 수치적 모형들은 초기 건조한 토양으로의 강우로 인한 침투와 같은 한계적인 유입경계조건인 경우에 국지적 유동영역으로 인해 수치적 진동 및 불안정성을 초래한다. 이러한 경우 주로 공간적으로 세분된 격자와 작은 계산시간 간격을 요구하는데 이는 계산의 효율성을 떨어뜨린다. 따라서 본 연구에서는 유입 경계조건을 포함하는 비정상 상태의 지표하 유동해석을 위해 입자추적 알고리즘을 적용하여 불연속영역에서의 수치적 불안정성을 제거하고자 하였다. 즉, 수치적 안정성이 개선된 혼합 LE 유한요소기법을 제시하였다. 제시된 모형의 수치적 검증을 위해 비정상 균일 유동장과 불균일 유동장의 가상예제에 적용한 결과 해석해와 유사한 결과를 얻을 수 있었고 이를 토대로 함양 및 양수에 대한 3차원 가상유역 모의에 적용되었다. 본 연구에서 제시한 입자추적 알고리즘은 포화 및 불포화 다공성 매체의 유동을 보다 실질적으로 모의할 수 있으며 계산의 정확성 및 안정성에 크게 기여할 것으로 판단되었다.

• 한국정보통신학회논문지
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• 제20권1호
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• pp.117-122
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• 2016

본 논문에서는 차량 추돌 방지 단거리 레이더용 24-GHz CMOS 고주파 전력 증폭기 (RF power amplifier)를 제안한다. 이러한 회로는 클래스-A 모드 증폭기로서 단간 (inter-stages) 공액 정합 (conjugate matching) 회로를 가진 공통-소스 단으로 구성되어 있다. 제안한 회로는 TSMC $0.13-{\mu}m$ 혼성신호/고주파 CMOS 공정 ($f_T/f_{MAX}=120/140GHz$)으로 설계하였다. 2볼트 전원전압에서 동작하며, 저전압 전원에서도 높은 전력 이득, 낮은 삽입 손실 및 낮은 음지수를 가지도록 설계되어 있다. 전체 칩 면적을 줄이기 위해 넓은 면적을 차지하는 실제 인덕터 대신 전송선(transmission line)을 이용하였다. 설계한 CMOS 고주파 전력 증폭기는 최근 발표된 연구결과에 비해 $0.1mm^2$의 가장 작은 칩 크기, 40mW의 가장 적은 소비전력, 26.5dB의 가장 높은 전력이득, 19.2dBm의 가장 높은 포화 출력 전력 및 17.2%의 가장 높은 최대 전력부가 효율 특성을 보였다.

• The Plant Pathology Journal
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• 제27권3호
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• pp.207-224
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• 2011

Diseases caused by plant pathogenic bacteria constitute an emerging threat to global food security. Xanthomonas is a large genus of Gram-negative bacteria that cause disease in several host plants leading to considerable losses in productivity and quality of harvests. Despite the ranges of controlling techniques available, the microbiological safety of economically important crops and crop plants including fruits and vegetables continues to be a major concern to the agriculture industry. On the other hand, many of the currently available antimicrobial agents for agriculture are highly toxic, non-biodegradable and cause extended environmental pollution. Besides, the use of antibiotics has provoked an increased resistance among the bacterial pathogens and their pathovars. Thus, novel efficient and safe remedies for controlling plant bacterial diseases are necessary. There has been an increasing interest worldwide on therapeutic values of natural products such as essential oils, hence the purpose of this review is to provide an overview of the published data on the antibacterial efficacy of essential oils that could be considered suitable for application in agriculture as biocontrol measures against plant pathogenic bacteria of Xanthomonas species. The current knowledge on the use of essential oils to control Xanthomonas bacteria in vitro and in vivo models has been discussed. A brief description on the legal aspects on the use of essential oils against bacterial pathogens has also been presented. Through this review, a mode of antibacterial action of essential oils along with their chemical nature and the area for future research have been thoroughly discussed.

• 한국환경복원기술학회지
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• 제4권4호
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• pp.19-24
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• 2001

숙근초화의 뗏장 생산에 적합한 초종과 바닥재를 선발하기 위해서 동자꽃, 톱풀, 큰꿩의비름, 섬기린초 등 자생식물 10종을 포함한 숙근초화류 14종의 뗏장 형성여부를 살펴보았다. 1. 재식장소에 따라서는 일반적으로 포트에 이식하여 노지에 정식하였을 경우보다 바크(bark)에 정식하였을 때 생육이 좋은 경향이었다. 2. 사용 바닥재의 종류에 따라서는 일반적으로 부직포에서 지면을 완전 피복할 때까지 걸리는 소요일수가 짧아지며, 뗏장형성능력이 좋았다. 특히 황마를 바닥재로 사용하였을 경우에는 기판이 부패하여 바크와 뿌리의 결속력이 크게 떨어지는 것을 볼 수 있었다. 3. 백리향, 좀씀바귀, 땅채송화, 바위채송화 등 포복성식물들은 꿩의비름, 애기개미취 섬쑥부쟁이 등의 직립성 초종에 비해 초고가 낮고 피복성이 좋은 것으로 나타났다.