• 한국응용곤충학회지
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• 제40권1호
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• pp.1-4
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• 2001

해외에서는 산림에 심각한 피해를 주는 Melanolophia imitata(Walker)가 우리나라에서 처음으로 보고된다. 이 종은 캐나다에서는 침엽수의 해충으로 알려져 있으며 동아시아 지역에서도 대량 발생할 경우 심각한 산림해충으로 예상되는 종이다.

• 제어로봇시스템학회논문지
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• 제11권11호
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• pp.936-942
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• 2005

Recently the exoskeletal power assistive equipment which is a kind of wearable robot has been widely developed to help the human body motion. For the elderly people and patients, however, some limits exist due to the weight and volume of the equipments. As a feasible solution, a tendon-driven exoskeletal power assistive device fur the lower body, and caster walker are proposed in this research. Since the caster walker carries the heavy items, the weight and volume of the wearable exoskeleton are minimized. The key control is used to generate the joint torque required to assist motions such as sitting, standing and walking. Experiments were performed for several motions and the EMG sensors were used to measure the magnitude of assistance. When the motion of sitting down and standing up was compared with and without wearing the proposed device, the $25\%$ assistance was acquired.

• Journal of Korean Neurosurgical Society
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• 제56권1호
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• pp.61-65
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• 2014

Neurocutaneous melanosis (NCM) is a rare congenital syndrome consisting of benign or malignant melanotic tumors of the central nervous system with large or numerous cutaneous melanocytic nevi. The Dandy-Walker complex (DWC) is characterized by an enlarged posterior fossa with high insertion of the tentorium, hypoplasia or aplasia of the cerebellar vermis, and cystic dilatation of the fourth ventricle. These each two conditions are rare, but NCM associated with DWC is even more rare. Most patients of NCM with DWC present neurological symptoms early in life such as intracranial hemorrhage, hydrocephalus, and malignant transformation of the melanocytes. We report a 14-year-old male patient who was finally diagnosed as NCM in association with DWC with extensive intracerebral and spinal cord involvement.

• 한국토양비료학회지
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• 제24권4호
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• pp.293-301
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• 1991

순천시(順天市), 승주(昇州), 보성지역(寶城地域)에 분포(分布)하는 시설원예지(施設園藝地)의 오이, 고추, 상추, 토마토 및 가지 등의 근권토양(根圈土壤)에서 분리(分離)된 VA균근균(菌根菌)의 동정(同定)한 결과(結果)는 다음과 같다. 시설재배(施設栽培) 토양(土壤) 중(中)의 속(屬), 종(種)의 동정결과(同定結果)는 Glomales 목(目), Glomineae 아목(亞目)에 속하고 Acaulosporaceae과(科)의 Acaulospora속(屬) 그리고 Glomaceae과(科)에 속하는 Glomus속(屬)와 Sclerocystis속(屬)가 확인(確認)되었고, 아목(亞目) Gigasprineae의 Gigasporaceae과(科)에 속하는 Gigaspora속(屬)와 Scutellispora속(屬) 등의 5개속(個屬) 15개종(個種)이 확인(確認)되었다. Acaulospora속(屬)에서는 6개종(個種) 즉 A. denticulata Sievering and Toro, A. elegans Trappe & Gerd., A. bireticulata Rothwell & Trappe, A. foveata Trappe & Janos, A. rehmii Sieverding & Toro, A. appendiculata Spain, Sievering & Schenck 등이 동정(同定)되었고, Glomus속(屬)는 3개종(個種) G. ambisporum Schenck & Smith(Type II), G. hoi Berch & Trappe, G. caledonium(Nicol. & Gerd.) Trappe & Gerd. 등이 Gigaspora 속(屬)는 G. gigantea (Nicol.& Gerd.) Gerd.& Trappe, G. decipiens Hall & Abbott, 그리고 Scutellispora 속(屬)는 S. aurigloba (Hall Walker & Sanders, S. calospora (Nicol.& Gerd.) Walker & Sanders, S. coralloidea (Trappe, Gerd. & Ho) Walker & Sanders 등 3개종(個種)과 Sclerocystis속(屬)에서는 S. pachycaulis Wu & Chen의 포자낭과(胞子囊果)가 동정(同定)되었다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.1147-1148
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• 2012

• The Journal of the Acoustical Society of Korea
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• 제15권2E호
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• pp.4-7
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• 1996

In this paper, we propose a formula to compute the exact autocorrelations of the autoregressive (AR) process. For an arbitrary value of N, we first review the Yule-Walker equation and some basic properties of the AR model. We then modify the Yule-Walker equation to construct a new system of N+1 linear equations that can be used to solve for the N+1 autocorrelation coefficients for lags 0, 1, …, N, provided that the AR parameters of order N and the power of the white noise of the AR process are given.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.1427-1428
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• 2013

• 대한수학회논문집
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• 제29권2호
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• pp.295-310
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• 2014

This paper provides a study of lightlike submanifolds of a generalized Robertson-Walker (GRW) space-time. In particular, we investigate lightlike submanifolds with curvature invariance, parallel second fundamental forms, totally umbilical second fundamental forms, null sectional curvatures and null Ricci curvatures, respectively.

• 대한수학회보
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• 제49권4호
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• pp.863-874
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• 2012

We provide a study of lightlike hypersurfaces of a generalized Robertson-Walker (GRW) space-time. In particular, we investigate lightlike hypersurfaces with curvature invariance, parallel second fundamental forms, totally umbilical second fundamental forms, null sectional curvatures and null Ricci curvatures, respectively.

• Korean Journal of Mathematics
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• 제28권1호
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• pp.75-87
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• 2020

Category F Rel of fuzzy sets and relations does not form a topos. J. Harding, C. Walker and E. Walker [3] showed that FRel has a tensor product and V. Durov [1] introduced basic definitions related to the notion of vectoid endowed with a tensor product. In this paper, we show that FRel forms a quasi topos. Also we show that there are quasi power objects in FRel. And by the use of the concepts of FRel and quasi topos, we get the logic operators of FRel. Moreover, we show that FRel forms a vectoid.