A new naturalized plant in Korea: Carex molestiformis Reznicek and Rothrock (Cyperaceae)

고승원,심상덕,현종영,김주환 한국식물분류학회 2020 식물 분류학회지 Vol.50 No.3

We found an unrecorded species, Carex molestiformis Reznicek & Rothrock, in Byeokparyeong, Daehwa-myeon, Pyeongchang-gun,Gangwon-do, South Korea. This species is native to southern parts of the United States (ca. 11 states, including Arkansas, Missouri, and Oklahoma). These plants are usually distributed densely in stream flood plains, bottomlands, stream banks, and along roadsides. Belonging to section Ovales Kunth, perennial herbs with gynecandrous spikes, C. molestiformis is closely related to C. maackii Maxim. and C. scoparia Willd. and is distinguished from them by the number (2–4) of spikes in each inflorescence and the width (2.6–3.4 mm) and number (6–9) of veins of perigynia. A new Korean name of C. molestiformis ‘Ga-Neun-Ta-Rae-Sa-Cho’ was given, as it has slender overall appearance compared with C. maackii (Ta-Rae-Sa-Cho). We also provide a description, illustrations, photographs and a key of relatedt axa in Korea. We compared three DNA barcode region (chloroplast DNA matK, ndhF and nuclear ribosomal DNA internal transcribed spacer) sequences from C. molestiformis with those of C. maackii and C. scoparia, determining eight species-specific single nucleotide polymorphism sites for C. molestiformis.

The Effect of Molecular Structure on the Solubility and Thermal Stability of Polyimides

고승원,진인주 한국고분자학회 1989 한국고분자학회 학술대회 연구논문 초록집 Vol.1989 No.4

Novel Poly(p-phenylenevinylene)s with an Electron-withdrawing Cyanopheneyl Group

고승원,정병준,안택,심홍구 한국고분자학회 2002 한국고분자학회 학술대회 연구논문 초록집 Vol.2002 No.4

제15대 대통령선거와 새로운 시대

고승원 한국지역사회연구소 1998 지역사회 Vol.28 No.-

일방향 파동방정식을 이용한 복잡한 구조의 키리히호프 중합전 심도구조보정

고승원,양승진 한국지구물리탐사학회 2002 지구물리와 물리탐사 Vol.5 No.1

Synthesis and Characterization of New Red Light Emitting PPV Derivatives Containing Cyclohexyl Group

고승원,정병준,이영범,심흥구 한국고분자학회 2001 한국고분자학회 학술대회 연구논문 초록집 Vol.2001 No.4

The Consideration for Optimum 3D Seismic Processing Procedures in Block II, Northern Part of South Yellow Sea Basin

고승원,신국선,정현영,Ko, Seung-Won,Shin, Kook-Sun,Jung, Hyun-Young The Korean Society Of Petroleum Geology 2005 한국석유지질학회지 Vol.11 No.1

2광구의 주요 탐사지역에는 심도 1 km 내외의 부정합면 하부에 대규모 단층이 발달되어 있다. 통상 이 부정합 인근의 탄성파 속도차는 매우 큰 편으로서 강한 다중반사파가 흔하게 발달되었고 탄성파 단면도는 왜곡되어 중합단면의 질적 저하가 예상되었다. 구조 인근의 다중반사파를 제거하고 해상력을 제고하기 위해 15가지 이상의 다양한 전산처리 기법이 적용되었다. 진폭 감소보정, 미약한 F/K 적용으로 일관성 잡음을 감쇠시켰다. 중합전 예측디콘볼루션으로 페그레그 다중반사파를 제거하였고 중합속도를 구하기 위해 매 2 km 간격으로 분석되었다. 잔여 다중반사파도 parabolic 라돈 변형절차를 거쳐 제거되었다. 중합자료를 얻기 위해 곡선파 curved ray Kirchhoff형 알고리즘이 적용되었으며, MVA (migration velocity analysis)가 이용되었다. 결과적으로 자료 취득기간의 기상변화 등 취득시의 문제점으로 지적된 불량한 잡음이 섞인 트레이스는 최초로 CDP gathers에서 제거되었다. 이후 다수의 전산처리 기법을 써서 최적의 전산처리 변수가 구해졌으며 그 결과 서해대륙붕 2광구의 구조 및 층서 해석에 적합한 탄성파 단면도 획득을 위한 인자들을 얻을 수 있었다. In the main target area of the block II, Targe-scale faults occur below the unconformity developed around 1 km in depth. The contrast of seismic velocity around the unconformity is generally so large that the strong multiples and the radical velocity variation would deteriorate the quality of migrated section due to serious distortion. More than 15 kinds of data processing techniques have been applied to improve the image resolution for the structures farmed from this active crustal activity. The bad and noisy traces were edited on the common shot gathers in the first step to get rid of acquisition problems which could take place from unfavorable conditions such as climatic change during data acquisition. Correction of amplitude attenuation caused from spherical divergence and inelastic attenuation has been also applied. Mild F/K filter was used to attenuate coherent noise such as guided waves and side scatters. Predictive deconvolution has been applied before stacking to remove peg-leg multiples and water reverberations. The velocity analysis process was conducted at every 2 km interval to analyze migration velocity, and it was iterated to get the high fidelity image. The strum noise caused from streamer was completely removed by applying predictive deconvolution in time space and ${\tau}-P$ domain. Residual multiples caused from thin layer or water bottom were eliminated through parabolic radon transform demultiple process. The migration using curved ray Kirchhoff-style algorithm has been applied to stack data. The velocity obtained after several iteration approach for MVA (migration velocity analysis) was used instead or DMO for the migration velocity. Using various testing methods, optimum seismic processing parameter can be obtained for structural and stratigraphic interpretation in the Block II, Yellow Sea Basin.

Smooth Background Model(SBM)을 이용한 가중 키리히호프 중합전 심도구조보정

고승원,양승진,신창수,Ko, Seung-Won,Yang, Seung-Jin,Shin, Chang-Su 한국지구물리물리탐사학회 2001 지구물리와 물리탐사 Vol.4 No.3

For the elastic migation, the velocity errors between the initial velocity model and true velocity model seriously affect the migrated images. The assumption of an initial velocity model, thus, is one of the critical factor for the successful migration. In case of applying the layered earth model as an initial velocity model, the layer boundary having large velocity contrast can not be defined well with conventional traveltime calculation algolithms and we have the difficulties for expressing the characteristics of the real subsurface. Smooth Background Model (SBM) we have applied as an initial velocity model in our study is characterized to be linearly varying the velocity with the depth, which can express the velocity variation in the subsurface properly. Thus it can properly be applied to traveltime calculation algolithms such as Vidale's method. In this study, Kirchhoff operator for prestack migration was used and the absolute amplitude obtained by modeling was applied as a weighted value to consider the true amplitude for initial model. Initial velocity model for migration was determined by using stacking velocity and we applied this model to real data.

모바일 어플리케이션 분석 및 검증 솔루션 구현 사례

고승원(Ko, Seung Won),정상곤(Joung, Sang Gon) 한국정보보호학회 2013 情報保護學會誌 Vol.23 No.2

스마트폰의 급증 현상은 모바일 생태계의 패러다임을 변화시켰으며 다양한 SW 컨텐츠의 양산과 더불어 그 활용영역의 확대를 가져왔다. 이에 따라 필연적으로 모바일 악성코드도 증가되고 있으며 개인정보 또는 회사 기밀정보의 무단 유출이라는 사회적 이슈도 대두되게 되었다. 이러한 문제를 해결하기 위해서는 모바일 어플리케이션에 대한 검증이 필요하고, 검증하는 방법에는 크게 정적분석 방법과 동적분석 방법이 있으며 분석 방법에 대한 자세한 내용은 선배 전문가들의 앞선 연구 사례와 논문에 몇 차례 소개된 바 있다. 이에 본 고에서는 정적분석 및 동적분석 방법을 응용하여 (주)안랩에서 실제로 운용 중인 모바일 어플리케이션의 분석 및 검증 솔루션(AMSD) 구현사례를 소개하고자 한다. 여기에는 기 알려진 정적분석 방법과 동적분석 방법에 대한 간략한 서술이 포함되어 있으며 시스템 아키텍처 정보와 실제 오픈 마켓을 대상으로 운용하면서 얻어진 앱 분석 사례 및 개선 방향도 담고 있다. 이를 통해 모바일 오픈 마켓 운영 시의 안전성과 신뢰성 확보 및 건전한 모바일 생태계 유지를 도모하는 데 조금이나마 도움이 되었으면 하는 바램이다.

가스 하이드레이트 부존층의 하부 경계면을 규명하기 위한 심도영역 탄성파 구간속도 분석

고승원(Ko, Seung-Won),정부흥(Chung, Bu-Heung) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06

For gas hydrate exploration, long offset multichannel seismic data acquired using by the 4km streamer length in Ulleung basin of the East Sea. The dataset was processed to define the BSRs (Bottom Simulating Reflectors) and to estimate the amount of gas hydrates. Confirmation of the presence of Bottom Simulating reflectors (BSR) and investigation of its physical properties from seismic section are important for gas hydrate detection. Specially, faster interval velocity overlying slower interval velocity indicates the likely presences of gas hydrate above BSR and free gas underneath BSR. In consequence, estimation of correct interval velocities and analysis of their spatial variations are critical processes for gas hydrate detection using seismic reflection data. Using Dix's equation, Root Mean Square (RMS) velocities can be converted into interval velocities. However, it is not a proper way to investigate interval velocities above and below BSR considering the fact that RMS velocities have poor resolution and correctness and the assumption that interval velocities increase along the depth. Therefore, we incorporated Migration Velocity Analysis (MVA) software produced by Landmark CO. to estimate correct interval velocities in detail. MVA is a process to yield velocities of sediments between layers using Common Mid Point (CMP) gathered seismic data. The CMP gathered data for MVA should be produced after basic processing steps to enhance the signal to noise ratio of the first reflections. Prestack depth migrated section is produced using interval velocities and interval velocities are key parameters governing qualities of prestack depth migration section. Correctness of interval velocities can be examined by the presence of Residual Move Out (RMO) on CMP gathered data. If there is no RMO, peaks of primary reflection events are flat in horizontal direction for all offsets of Common Reflection Point (CRP) gathers and it proves that prestack depth migration is done with correct velocity field. Used method in this study, Tomographic inversion needs two initial input data. One is the dataset obtained from the results of preprocessing by removing multiples and noise and stacked partially. The other is the depth domain velocity model build by smoothing and editing the interval velocity converted from RMS velocity. After the three times iteration of tomography inversion, Optimum interval velocity field can be fixed. The conclusion of this study as follow, the final Interval velocity around the BSR decreased to 1400 m/s from 2500 m/s abruptly. BSR is showed about 200m depth under the seabottom