KOMPSAT-3A 중적외선 영상의 공간해상도 복원 기법

오관영,이광재,정형섭,박숭환,김정철 대한원격탐사학회 2019 大韓遠隔探査學會誌 Vol.35 No.6

The KOMPSAT-3A is a high-resolution optical satellite launched in 2015 by Korea Aerospace Research Institute (KARI). KOMPSAT-3A provides Panchromatic (PAN-0.55 m), Multispectral (MS- 2.2 m), and Mid-wavelength infrared (MIROR-5.5 m) image. However, due to security or military problems, MIROR image with 5.5m spatial resolution are provided down sampled at 33 m spatial resolution. In this study, we propose spatial sharpening method to improve the spatial resolution of MIRrd image (33 m) using High Frequency (HF) image and optimal fusion factor. Using MS image and MIRrd image, we generated virtual high resolution (5.5 m) MIROR fus image and then compared them to actual high-resolution MIROR image. The test results show that the proposed method merges the spatial resolution of MS image and the spectral information of MIRrd image efficiently. KOMPSAT-3A는 2015년 한국항공우주연구원(KARI)이 발사한 고해상 광학위성으로 0.55 m 급 전정색영상(PAN), 2.2 m 급 다중 분광 영상(MS) 그리고 5.5 m 급 중적외선 영상(MIROR)을 제공한다. 그러나 보안 또는군사적인 문제로 인해 공간 해상도 5.5 m MIROR 영상은 33 m 공간해상도로 down-sampling된MIRrd 영상으로 제공된다. 본 연구에서는 고주파(HP) 영상과 최적 융합 계수를 이용하여 MIR_rd 영상의 공간해상도를 복원하는방법을 제안하였다. MS 영상과 MIRrd 영상을 이용하여 가상의 MIROR fus 영상을 제작하였으며, 이를 실제 MIROR 영상과 비교 분석하였다. 실험 결과, 제안된 방법이 MS 영상의 공간해상도와 MIRrd 영상의 분광정보를 효과적으로 조합 하였다는 것을 보여주었다.

A Unified Harmonic Approach to Lenitions on Level Structures: Stress Shift and Vowel Shortening

오관영 대한언어학회 2014 언어학 Vol.22 No.3

This study accounts for the correlation between vowel shortening and stress shift triggered by suffixation through foot structures in level-structures. The reason we adopt this approach is that we assume the stress shift and vowel shortening are not separately implemented but they apply simultaneously. Furthermore, this method can give explanations to the phenomena without referring to intermediate derivations and the complexity of rule applications. First, we review a few analytical methods such as phonological rules-based, lexical, CV-level structure, and metrical approaches. Second, due to limitations of these approaches, this study focuses on level-structures to explain the examples discussed in previous studies by suggesting the new devices of a modified Prestress Destressing rule, Minor Weakening and Major Shortening rules, and their conditions for the rule application. Therefore, this study offers more simplified and clearer analytical methods to explain the stress shift and vowel shortening compositely in level-structures than the previous approaches.

Accuracy Evaluation of DEM generated from Satellite Images Using Automated Geo-positioning Approach

오관영,정형섭,이명진 대한원격탐사학회 2017 大韓遠隔探査學會誌 Vol.33 No.1

S The need for an automated geo-positioning approach for near real-time results and to boost cost-effectiveness has become increasingly urgent. Following this trend, a new approach to automatically compensate for the bias of the rational function model (RFM) was proposed. The core idea of this approach is to remove the bias of RFM only using tie points, which are corrected by matching with the digital elevation model (DEM) without any additional ground control points (GCPs). However, there has to be a additional evaluation according to the quality of DEM because DEM is used as a core element in this approach. To address this issue, this paper compared the quality effects of DEM in the conduct of the this approach using the Shuttle Radar Topographic Mission (SRTM) DEM with the spatial resolution of 90m. and the National Geographic Information Institute (NGII) DEM with the spatial resolution of 5m. One KOMPSAT-2 stereo-pair image acquired at Busan, Korea was used as experimental data. The accuracy was compared to 29 check points acquired by GPS surveying. After bias-compensation using the two DEMs, the Root Mean Square (RMS) errors were less than 6 m in all coordinate components. When SRTM DEM was used, the RMSE vector was about 11.2m. On the other hand, when NGII DEM was used, the RMSE vector was about 7.8 m. The experimental results showed that automated geo-positioning approach can be accomplished more effectively by using NGII DEM with higher resolution than SRTM DEM.

산전 진단을 위해 시행한 제대천자술 5예

오관영,이지영,정진선,손진희,박미영,김영주,안정자,우복희 梨花女子大學校 醫科大學 醫科學硏究所 1998 EMJ (Ewha medical journal) Vol.21 No.3

This study has been composed of 5 cases of cordocentesis between 21 and 34 weeks of gestational age from February 1997 to January 1998 at the Ehwa Medical Center. Indications for cordocentesis were as follows : 1) rapid karyotyping 2) evaluation of hematologic status 3) intrauterine infection 4) evaluation of fetal acid-base status. The most common indication for cordocentesis was rapid karyotyping of fetal chromosome. All cases of this study were successful. In conclusion, cordocentesis is a safe and very useful procedure for evaluating fetal status.

Revisiting Coherent Relationships between Bases and Suffixes through Stress Change: -ate and -al

오관영 대한영어영문학회 2017 영어영문학연구 Vol.43 No.4

Oh, Kwan Young. “Revisiting Coherent Relationships between Bases and Suffixes through Stress Change: -ate and -al.” Studies in English Language & Literature 43.4 (2017): 273-293. The purpose of the study is to identify what stress changes occur in -ate and -al suffixation in terms of aspects of strength relations through making a comparison between rule-based approaches and constraint-based ones. These suffixes perform dual functions: -ate belongs to Class I (Lee 1996), but plays a role as a stress-bearing or stress-neutral suffix in its specific context where it is affixed; -al is classified into either Class I or Class II, but oscillates between stress-neutral and stress-shifting modes in suffixation. Therefore, first we reclassify the suffixes according to their characteristics in stress-modes. Next, we examine the stress change through rule-based analyses (Ross 1972, Liberman and Prince 1977, Burzio 1994), and then account for it by adopting constraint-based approaches based on the foot structures. As a result, it is demonstrated that the approaches relying on the constraints are more satisfactory in explaining the stress change as well as the strength relations between the bases and the suffixes in suffixation. (Chonnam National University)

한국인 화자들의 음절화와 음성실현의괴리에 따른 함축적 관계 규명

오관영 대한언어학회 2013 언어학 Vol.21 No.4

The purpose of this study is to investigate how Korean and English speakers syllabify two-syllable English words with single intervocalic consonants in written and listening tasks. Through analyses of Korean and English speakers, I tried to identify whether their syllabification was affected by phonological factors of stress position, vowel length, and consonant type. For this, I classified responses of both subjects into response 1(e.g., col/or), response 2(e.g., co/lor), and response 1-2(e.g., co-l-or). In written tasks, both English and Korean speakers mostly tended to put intervocalic consonants in the second stressed syllable, which follows the Maximal Onset Principle. But, while English speakers were generally influenced by consonant type, vowel length, and stress, Koreans were affected only by consonant type, especially nasals and obstruents, regardless of stress position or vowel length. In listening tasks, responses of 1 and 2 in both speakers showed almost identical patterns witnessed in those of the written tasks. However, in response 1-2, English speakers were affected by vowel length and stress position, but Koreans were strongly influenced by consonant type, that is, liquids, which reflected the influence of the syllable structure of their native language.

음절후부에 대한 재분석

오관영 한국음운론학회 2002 음성·음운·형태론 연구 Vol.8 No.2

Oh, Kwan-Young. 2002. On the Reanalysis of the Coda. Studies in Phonetics, Phonology and Morphology 8.2. 223-237. The purpose of this paper is to suggest a new method for analyzing complex codas in the final syllables of word. If we consider any previous method used for analyzing syllable structures, we can't explain the complex codas appropriately. This is because previous syllable structures have allowed only one or two codas after a nucleus, and in the case of the complex codas, the relation between the coda and the appendix has generally been analyzed differently. The approach taken by this paper is based on the Harmonic Theory. The reason this paper has adopted the Harmonic theory is that, within the framework of this theory it is possible to use the appropriate information of three levels, in which the morphological information can be shown under a phonological word. I also suggest the modified syllable structure for the new framework, for by applying it, we can solve the problems related to complex codas, even in the case that an inflectional suffix of plural or past ending is added. (Yosu National University)

일반연제 발표 : 산과학 1 ; 임신주수에 따른 간용적의 변화

오관영,임문환,임영구,박지현,송은섭,이병익,김종화,안정자 대한산부인과학회 1999 대한산부인과학회 학술대회 Vol.84 No.-

일반연제 발표 : 산과학 1 ; 37주 미만의 조기분만에서 쌍태 임신과 단태임신의 주산기 예후 비교

오관영,박미혜,양윤석,황인택,정지학,박준숙 대한산부인과학회 2001 대한산부인과학회 학술대회 Vol.87 No.-

영어자음의 음성분석을 통한 조음의 유사성과 음성인식의 차이 및 단서 규명을 위한 실험연구

오관영 한국언어학회 2010 언어 Vol.35 No.3