ViewPortal: 스마트글래스-스마트폰 협력 상호작용을 위한 공간 공유

장석성(Seogsung Jang),이주영(Juyoung Lee),우운택(Woontack Woo) 한국HCI학회 2020 한국HCI학회 학술대회 Vol.2020 No.2

안경형 증강현실 인터페이스에서 가장 각광받는 입력방식은 기기의 전면에 부착된 센서를 이용해 전방 허공에서 행해지는 손 제스쳐를 인식하는 것이다. 이와 같은 형태의 입력방식은 손을 지속적으로 센서 앞에 위치시켜야 하여 인터페이스 사용시 쉽게 사용자의 피로도를 증가시킨다. 뿐만 아니라 디바이스와 사용자 사이의 물리적인 접촉이 발생하지 않기 때문에 입력의 발생여부를 파악하는 것이 전통적인 인터페이스에 비해 어렵다. 그로 인해 안경형 증강현실 인터페이스는 세밀하고 빈번한 입력을 요구하는 과업을 수행하는데 큰 어려움을 가지고 있다. 뿐만 아니라 현실 객체를 매개로 데이터를 정합 하는 증강현실의 특성상 일정거리 이상으로 흩어져있는 가상객체들에 접근하기위해서는 일일이 걸음을 옮겨야 하여 자유로운 탐색에 대한 불편함이 존재한다. 이에 우리는 안경형 증강현실 디바이스를 통해 바라보고 있는 가상공간을 부분 공간으로 만들어 스마트폰으로 전송하여 안경형 증강현실 인터페이스를 통해 해결하기 어려웠던 UI 조작을 스마트폰의 협력적인 사용으로 쉽게 처리할 수 있는 ViewPortal 를 제안한다.

낙엽송 임분에 침입한 층층나무의 공간분포에 따른 유전변이

장석성 ( Jang Seog Seong ),홍경락 ( Hong Gyeong Lag ),이석우 ( Lee Seog U ),김홍은 ( Kim Hong Eun ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.1

This study was conducted to investigate the spatial genetic structure of Cornus controversa growing in a 33-year-old L a n i kaempferi stand in Mt. Odae, Korea. Size of the study plot was 1,500㎡ (30m×50m). The number of trees, averages of tree height and diameter in breast height (DBH) of L . kaempferi which occupied the upper crown layer were 209, 15.7m and 16.2㎝, respectively. C. controvema formed the middle crown layer, and the number of trees, averages of tree height and DBH were 229, 5. ml and 3.7cm, respectively. Species in the study plot were the typical ones growing on the northern slope with less intensity of radiation and good soil humidity. The species composition was similar to that of DryopterZS crassirhizom- C. controvema community group in Mt. Odea. The spatial distribution pattern of L. kaemflfen` was the regularity, but the randomness in C. controvem. The genetic analysis with 229 C. controvem trees for 12 loci in 8 enzyme systems resulted in 4 polymorphic (Lap2 et al.) and 4 monomorphic (Aat-1 et al.) loci. The number of genotypes for 10 alleles in 4 ploymorphic loci and the number of trees per genotype were 33 and 6.9 (SD=12.2), respectively. The maximum number of trees per genotype was 60, and the number of cases that were only one tree per genotype was 11. Spatial autocorrelation analysis using the distance interval of 4m showed that Moran`s I statistic was decreased gradually with the increase of spatial distance until 16m and there was no genetic relationship among trees at the range of 16-24m. The genetic patchy size of C. controvema was 16m. The main factor in the settlement of C. controvem trees in L. kaempfen` stand might be the evacuation of birds eating the seed, instead of seed movement caused by the gravity. If the foraging guild of birds has been regularly active in L . kaem$feri stand, the genetic patchiness of C. controvema can be established without the nearby adults. When trees are selected with the distance interval of 28m, they will be more genetically diverse for the ex situ conservation. Also, it takes small genetic diversity of this study area into consideration, it may be better to collect trees in other regions of Mt. Odae for the effective ex situ conservation.

오존 노출에 의한 층층나무의 유전특성 변화

장석성 ( Jang Seog Seong ),이석우 ( Lee Seog U ),이재천 ( Lee Jae Cheon ),한심희 ( Han Sim Hui ),김홍은 ( Kim Hong Eun ) 한국농림기상학회 2003 한국농림기상학회지 Vol.5 No.4

N/A To examine the effects of ozone (0₃), one of the major air pollutants in the city area, on genetic changes in Corpus controversa Hemsl., we compared genetic structures between sensitive (S) and tolerant (T) tree groups of C. controversa fumigated with ozone using isozyme markers. The genetic structures were measured in terms of allele and genotype frequencies determined at five polymorphic enzyme loci. Marked genetic differences between the two groups were detected at three loci (Lap-2, Mdh-1 and Skdh-1). Genetic parameters, genetic multiplicity, genetic diversity and heterozygosity showed that the tolerant group retained greater genetic variation than did the sensitive group. Results of the study were congruent with the general expectation that the more heterozygous individuals and/ or populations exhibit higher resistance to various stress factors.

층층나무의 오존 내성 개체 선발

장석성 ( Suk Seong Jang ),이재천 ( Jae Cheon Lee ),한심희 ( Sim Hee Han ),김홍은 ( Hong Eun Kim ) 한국농림기상학회 2003 한국농림기상학회지 Vol.5 No.1

본 연구는 층층나무를 대상으로, 엽 내에서 측정한 MDA 함량을 기준으로 오존 내성 개체를 선발하고자 수행하였다. 또한 각종 오염물질에 대한 내성을 평가하기 위해 MDA 함량을 이용하는 것이 타당한지를 검토하고자 하였다. 실험에 사용된 층층나무는 오대산(5본), 치악산(5본), 점봉산(5본), 주왕산(1본), 태백산(1본), 지리산(5본), 소리봉(5본), 속리산(4본), 소백산(4본), 계방산(4본) 등 9개 지역에서 채취한 종자를 이용하였으며, 오존 처리는 100ppb에서 하루 8시간씩 10주 동안 실시하였다. 오존 처리가 종료된 후, 층층나무의 수고와 MDA 함량을 측정하였고, 수고와 MDA 함량의 표준화 지수를 이용하여 오존에 대한 내성그룹, 중간그룹, 민감성그룹을 각각 30개체씩 선발하였다. 오존 처리된 층층나무의 수고와 MDA 함량은 가계간, 지역간 차이를 보여주었으며, MDA 함량은 수고생장과 역상관(r=-0.531, p≤0.001)을 나타냈다. 개체별 수고와 MDA 함량을 기준으로 선발한 층층나무는 내성그룹과 민감성 그룹간 수고와 MDA 함량 차이가 뚜렷하였다. 따라서 MDA 함량은 오존에 대한 내성 및 민감성을 구분하는데 유용하게 이용될 수 있을 것으로 판단된다. This study was conducted to select the ozone tolerant individuals of Cornus controversa Hemsl., and to use malondialdehyde (MDA) content as an indicator of plant damage level for several oxidative stress levels. Seeds of C. controversa were collected at 9 provinces in Korea. One-year-old seedlings were grown in greenhouses and exposed to 100 ppb ozone concentration for 8h day^-1 for 10 weeks. At the termination of ozone exposure, heights of seedlings were measured and MDA contents in the leaves were analyzed. Tolerant, intermediate, and sensitive individuals were selected using the standardized indices of height and MDA content. Height and MDA content of C. controversa exposed to ozone were significantly different among individuals and provinces. MDA content showed negative correlation (r=-0.531, P≤0.001) with height growth performance. Height and MDA content of tolerant individuals presented significant differences from those of sensitive individuals. As a result, MDA content may be suitable for the evaluation of the damage level of plants by oxidative stress.

층층나무 천연집단의 유전변이와 구조

장석성 ( Suk Seong Jang ),이석우 ( Seok Woo Lee ),김찬수 ( Chan Soo Kim ),김영모 ( Yong Mo Kim ),김홍은 ( Hong Eun Kim ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.1

The genetic structure of Cournus controversa Hemsl. , sampled throughout its range in South Korea, was studied using starch-gel electrophoresis, Eighteen enzyme loci in 8 enzyme systems were examined. The level of genetic diversity (A=1.6, A_e=1.192, P=48.1%, H_o=0.120, H_e=0.124) and the degree of genetic differentiation (Fsr = 0.073) were comparable to those of other tree species with similar life histories and ecological trails . Nine natural C. controversa populations seemed to he in equilibrium with the expectations of Hardy-Weinberg. Nm, the number of migrants per generation was 3.16. The UPGMA- derived dendrogram based on Nei`s (1978) genetic distance showed decisive geographic trends; the geographically close populations were genetically clcse . The spatial distribution patterns of C. controversa trees in a stand and the seed dispersal mode appeared to be critical factors that determined the genetic structure of C. coufroyerso.

층층나무의 오존 내성 개체 선발

장석성 ( Suk Seong Jang ),이재천 ( Jae Cheon Lee ),한심희 ( Sim Hee Han ),김홍은 ( Hong Eun Kim ) 한국농림기상학회 2002 학술발표논문집 Vol.2002 No.2

기상인자에 의한 우리 나라 산림의 산지구분

임경빈,장석성,최완용,탁우식 한국임학회 1999 한국산림과학회지 Vol.88 No.3

As a first step for delineating the provenance regions of the forest trees in Korea, horizontal zones have been deduced primarily from the various climatic factors such as annual mean temperature, extremely low temperature, relative humidity, annual gum of possible growing days, duration of sunshine and dry index. The basic concept to the delineation of the provenance regions was based on the ecological regions, which was likely to be more practical than thai .m the basis of the typical provenance regions at the species level. Primary classification of the regions has been based on the forest zones(sub-tropical, warm-temperate, mid-temperate and cool-temperate) as a broad geographic region. Further classification has been carried out using cluster analyses among the basic regions within forest zone. On the basis of clustering, a total of 19 regions including 3 from sub-tropical, 6 from warm-temperate, 8 from mid-temperate and 2 from cool-temperate was horizontally delineated. Of the mean values of 6 climate factors at the broad geographic region level, three factors such as annual mean temperature, extremely low temperature, annual growing days showed directional tendencies from subtropical to cool-temperate, while the others didn't. The values of relative humidity, duration of sunshine and dry index varied among the provenance regions within forest zone. These three factors might he more sensitive by the micro-environment condition than by the macro-environment condition. Present study aimed to delineate the primary provenance regions for tentative application to forest practices. These will be stepwise revised through the supplement using accumulated information regard to genecological data.

Estimation of Mating System Parameters in the Natual Population of Pinus densiflora of Anmyun Island, Korea Using Allozyme Markers

이석우,장석성,장경환,김찬수 한국산림과학회 2003 한국산림과학회지 Vol.92 No.2

조림 분야 : 백합나무 유묘생산 기술개발

탁우식,장석성,구영본 한국임학회 2001 한국임학회 학술발표논문집 Vol.2001 No.-

학술연구 발표논문집 : 유전,육종 분야 ; 산림과학관 1층 특별전시실 : 안면도 소나무 천연집단의 교배양식 모수 추정

이석우,장석성,장경환,김찬수 한국임학회 2003 한국임학회 학술발표논문집 Vol.2003 No.-