Three Feather Mites (Acari: Sarcoptiformes) Isolated from Black-Tailed Godwit, Limosa limosa in Korea

한영덕,민기식 한국동물분류학회 2019 Animal Systematics, Evolution and Diversity Vol.35 No.3

Feather mites comprise two superfamilies (Analgoidea and Pterolichoidea) and are highly specialized ectosymbionts of birds. To date, this group contains more than 2,500 species worldwide. Fifty-five feather mite species have been reported in Korea, and only one species of genus Alloptes has been recorded from black-tailed godwit Limosa limosa. Three new records of feather mites from the L. limosa in Korea are added in this study: Avenzoaria punctata Gaud, 1972, Bregetovia limosae (Buchholz, 1869), and Montchadskiana buchholzi (Canestrini, 1878). The genus Bregetovia Dubinin, 1951 is also new report for this country. In this paper, we provide the morphological descriptions and illustrations based on the present specimens. Additionally, we determined partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI) from three feather mites as DNA barcodes.

숨은 변수 모델에서의 모순에 관한 연구

한영덕 又石大學校 1995 論文集 Vol.17 No.-

Bell's inequalities can be regarded as an expressions of the positivity conditions for the measures of hidden variable sets. For non-maximally entangle states, we show that the measures can be determined exactly, and also show that some of the measures must be negative. We give a simplified version of Hardy's non-locality proof, By examining its logical aspects, we show that quantum mechanical propositions lead to contradictions when the ordinary logical deduction processes are applied to them.

Three feather mites (Acari: Sarcoptiformes: Astigmata) isolated from Tringa glareola in South Korea

한영덕,민기식 국립생물자원관 2019 Journal of species research Vol.8 No.2

We describe three feather mites recovered from a wood sandpiper Tringa glareola that was stored in a - 20°C freezer at the Chungnam Wild Animal Rescue Center. These feather mites are reported for the first time in South Korea: Avenzoaria totani (Canestrini, 1978), Ingrassia veligera Oudemans, 1904 and Montchadskiana glareolae Dabert and Ehrnsberger, 1999. In this study, we provide morphological diagnoses and illustrations. Additionally, we provide partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene as molecular characteristics of three species.

상대론적 전자 소용돌이의 베셀 빔 해

한영덕 한국물리학회 2020 새물리 Vol.70 No.2

In non-relativistic electron vortex beams, the spin of an electron is treated as a degree of freedom independent from the momentum of the electron. However, for a relativistic electron described by the Dirac equation, its spin is intimately related to its momentum, as is manifested by spinorbit coupling, helicity conservation, etc. In this paper, we construct a Bessel beam solution by superposing momentum eigen functions, whose spins are parallel to the momentum or at a constant angle with the beam axis. By introducing a Gaussian envelope function for the normalization of the wave functions, we calculate the expectation values for physical quantities such as the spin and magnetic moment. Also, the differences from the results of previous studies are discussed. 비상대론적 전자 소용돌이 빔에서 전자의 스핀은 운동량과 독립적인 자유도로 취급된다. 그러나 Dirac 방정식으로 기술되는 상대론적 전자의 경우 스핀-궤도 상호작용, 나선도 보존 등에서 보는 바와 같이스핀은 운동량과 밀접한 관계가 있다. 따라서 상대론적 소용돌이 빔을 기술하는 파동함수에는 이러한특성이 고려되어야 한다. 본 논문에서는 운동량 고유상태들을 중첩하여 Bessel 빔 해를 구하였는데, 이 때스핀은 나선도 고유상태이거나 빔의 중심축과 일정한 각도를 이루도록 하였다. 규격화를 위한 가우시안싸개함수를 도입하여 스핀, 자기모멘트 등의 물리량의 기대값을 구하였고 기존 연구 결과와의 차이점을논의하였다.

자연스러운 지형 생성을 위한 침식 시뮬레이션

한영덕 한국게임학회 2015 한국게임학회 논문지 Vol.15 No.6

지형에 대한 기존의 침식 시뮬레이션은 주로 소규모의 지형 변화에 초점을 맞추고 있다. 이 논문에서는 물에 의한 침식과 열적 침식과정을 결합하여 강의 네트워크와 산들로 이루어진 자 연스러운 대규모의 지형을 형성하는 방법을 제안한다. 물의 흐름에는 shallow water 시뮬레이 션의 파이프 모델을 사용하며, 강물의 줄기가 쉽게 형성되게 하기 위해 속도에 의존하는 침식 을, 강줄기 주변에 V자형 골짜기가 생성되게 하기 위해 열적 침식을 적용한다. 시뮬레이션 결 과 Kc (퇴적물 수용상수)와 Kc (속도의존 침식강도)의 값이 적당한 범위에 있을 때만 목적한 모 양의 지형이 생성되며, 이렇게 생성된 대표적인 자연스러운 모양의 지형을 예시한다. 또한 기존 의 열적 침식 방법의 개선과 Kc가 큰 값일 때 발생하는 문제점을 해결할 방안을 제시한다. Existing hydraulic terrain erosion simulations mainly focus on small scale terrain deformations. In this paper, we propose a simulation method combining hydraulic terrain erosion and thermal erosion, by which a natural large scale terrain of mountainous regions with river networks can be created. For water movement we use the pipe model of shallow water simulation, and for the easy formation of watercourse we use velocity dependent erosion, also we apply thermal erosion for the formation of V-form slopes in the vicinity of stream lines. As a result, we can obtain good natural shaped terrains for certain ranges of Kc (sediment capacity constant) and Kc (velocity dependent erosion strength) values. Also we present improved thermal erosion method, and suggest a way to avoid problems caused by large Kc value.

마른 비만인 여대생들에게 유산소 운동과 복합운동이 신체 조성에 미치는 영향

한영덕,이태성,김새림,류아름,박준,한다원,김다솜,양회송,유영대,정찬주 대한스포츠물리치료학회 2015 정형스포츠물리치료학회지 Vol.11 No.1

The purpose of this study was to identify the most effective exercise program on normal weight obesity coed. This study was performed on eighteen subjects with normal weight obesity(aged 19 to 22). Eighteen subjects were divided into two groups; aerobic exercise group(n=9), core stability exercise include aerobic exercise group(n=9). Both of the group performed the aerobic exercises and core stability exercise include aerobic exercises four times a week for six weeks. All subjects were measured before and after exercises by inbody for body fat percentage, fat-free mass, skeletal muscle mass and WHR(Waist Hip Ratio). The data was analyzed by the paired t-test for comparing before and after changes of factor in each group and the independent t-test for comparing the between groups. The results were as follows. There was statistically significant difference of before and after body fat percentage, fat-free mass, skeletal muscle mass and WHR(p<0.05). There was statistically significant difference between aerobic exercise group and core stability exercise include aerobic exercise group in skeletal muscle mass and WHR(p<0.05). There was no statistically significant difference between the aerobic exercise group and core stability exercise include aerobic exercise group in body fat percentage and fat-free mass(p>0.05). As a result of this study, we found that the core stability exercise include aerobic exercises may be effective more than aerobic exercise.

코드를 활용한 프랙탈 변형의 전파 제어 방법

한영덕 한국게임학회 2016 한국게임학회 논문지 Vol.16 No.1

본 논문에서는 IFS(iterated function system) 프랙탈에서 점의 코드를 활용한 변형의 개선 방법을 고려한다. 기존의 변형방법에서는 부분적 변형이 랜덤 반복에 의해 임의로 전파되므로 대개 단조로운 느낌을 주는 모양이 나타나고 있다. 이러한 점을 개선하기 위하여 코드를 활용 하여 맵의 선택을 제어하는 방법을 제안한다. 제안된 방법을 적용한 결과 프랙탈의 모양 특성 이 적절히 반영된 흥미로운 변형을 얻을 수 있었다. 또한 코드에 따라 변화하는 상태변수를 도 입하여 좌표의 변환 외의 다른 속성의 변형을 손쉽게 구현하는 방법도 제안한다. In this paper, we consider an improved deformation method of IFS(iterated function system) fractal using codes of fractal points. In the existing deformation methods, the intermediate results of position dependent partial deformation propagate randomly due to the randomly selected maps of iteration. Therefore, in many cases, the obtained results become somewhat monotonous feeling shapes. To improve these limitations, we propose a method in which the selection of maps are controlled by codes of fractal points. Applying this method, we can obtain interesting fractal deformation conforming with its fractal features. Also, we propose a simple method, incorporating state variables, that can be applied to deformation of some fractal features other than position coordinates.

New Records of Four Feather Mites (Acariformes: Astigmata) from Waders (Charadriiformes: Scolopacidae) in Korea

한영덕,Sergey V. Mironov,민기식 한국동물분류학회 2022 Animal Systematics, Evolution and Diversity Vol.38 No.3

Four feather mites, Dichobrephosceles actitidis(Canestrini, 1878)(Alloptidae), Limosilichus limosae Vasyukova and Mironov, 1986, L. numeni Vasyukova and Mironov, 1986 (Syringobiidae), and Pomeranzevia numenii (Canestrini, 1878) (Avenzoariidae), have been reported in Korea for the first time. Specimens of D. actitidis and L. limosae were obtained from the common sandpiper, Actitis hypoleucos (Linnaeus, 1758), and the black-tailed godwit, Limosa limosa (Linnaeus, 1758), respectively, while L. numeni and P. numenii were collected from the Eurasian whimbrel, Numenius phaeopus (Linnaeus, 1766). The genera Dichobrephosceles Peterson and Atyeo, 1968, Limosilichus Vasyukova and Mironov, 1986, and Pomeranzevia Dubinin, 1951 are also new records for the fauna of Korea. This paper provides morphological descriptions, illustrations, and partial sequences of mitochondrial cytochrome c oxidase subunit I(COI) for all the recorded species based on the specimens collected in Korea.

스핀을 이용한 방향정보전달의 확률분포

한영덕,김기옥 한국물리학회 2005 새물리 Vol.50 No.1

A direction can be encoded on spins and decoded by some measurements. The form of the probability distribution of the guessed directions cannot be fixed without information on the concrete encoding/decoding method, but it is not arbitrary. We showed that, due to the rotational transformation properties, there is some constraint on the functional form of the probability distribution. Using these results, we calculate the maximal fidelities for some spin numbers. 유한개의 스핀-$1/2$을 이용하여 방향정보를 표시하고 이를 측정을 통해 해독해내는 경우, 추정된 방향의 확률분포모양은 그 방법에 의존하게 되지만 임의의 모양이 다 가능한 것은 아님을 보였다. 즉 스핀의 회전변환 성질을 이용하여 확률분포함수가 특정한 모양이 되어야 함을 보였다. 또한 이를 이용하여 방향전달 충실도의 가능한 최대값을 사용한 스핀의 갯수에 따라 구하였다.

New record of two feather mites (Acari: Sarcoptiformes: Astigmata) isolated from Actitis hypoleucos in South Korea

한영덕,민기식 국립생물자원관 2019 Journal of species research Vol.8 No.2

Two feather mites, Bychovskiata hypoleuci Mironov and Ddabert, 1997 and Phyllochaeta interifolia (Mégnin and Trouessart, 1884) are reported for the first time in South Korea. Specimens of these two species were collected from the common sandpiper Actitis hypoleucos. The genera Bychovskiata Dubinin, 1951 and Phyllochaeta Dubinin, 1951 are also new reports for South Korea. Here, we provide morphological descriptions and illustrations of these two species. Additionally, we provide partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI) as DNA barcodes.