Visual Odometry for Outdoor Environment using a Downward-Tilting Camera and Self-Shadow Removal Algorithm

Sungho Hong,Jae-Bok Song,Joo-Hyun Baek,Jae-Kwan Ryu 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

Stereo vision based visual odometry faces few challenges when it is performed in the outdoor environment. The first problem is the inaccurate depth values which result in poor distance estimation. This problem can be solved by tilting a stereo camera downward and using features from the ground texture. Second, self-shadow made by the sun can causes errors in estimating the robot movement since it looks stationary in the robot’s perspective. This was resolved by estimating the sun ray direction and excluding the self-shadow area in the camera image. This process can be conducted by using only a first image that the robot grabs. These two algorithms were proven to be successful in improving the accuracy of visual odometry in the outdoor environment.

A Case of Perforating Osteoma Cutis

Hong, Sungho,Kang, Hee Young 대한피부과학회 2003 Annals of Dermatology Vol.15 No.4

A 24-year-old man presented with a 1.5 × 0.5 cm-sized erythematous nodule with central crust on the forehead since 5 years ago. There was no history of trauma or previous skin disorders. Histopathologic examination showed a typical picture of osteoma cutis. In addition, transepidermal elimination of bony material was observed: red linear plate-like calcified lamella structures had extruded to the skin surface through the perforated epidermis. The perforating type of osteoma cutis was discussed.

Application of Laser-induced Breakdown Spectroscopy for Rapid Sorting of Stainless Steel Scraps for Recycling

( Sungho Shin ),( Youngmin Moon ),( Jaepil Lee ),( Seongmin Hong ),( Sungho Jeong ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-

The growth of worldwide stainless steel consumption over the past years has been steady. Therefore, recycling of stainless steels has been encouraged since stainless steel contains valuable raw materials like Cr, Ni, Mn and Mo and the production of stainless steel is costly. However, stainless steel has various types and grades depending on elemental compositions. For the recycling of stainless steel scraps, sorting the scraps by stainless steel type and grade is vital. Since stainless steel scraps have not much difference in color and composition ratio, they can be accurately sorted only by measuring their compositions. Laser-induced breakdown spectroscopy (LIBS) is an appropriate method for this purpose and has been considered as a promising technique for the rapid determination of compositions of scrap metals based on a chemical analysis. LIBS has various advantages such as fast multi-elemental and in-air analysis that enables a real time analysis in industrial environments. For the application of LIBS to an industrial system, however, it is necessary to reduce the effects of plasma fluctuation during LIBS measurement since LIBS signals are influenced by plasma property changes. In this work, we report the results of LIBS elemental analysis of similar stainless steel certified reference metals in variable focusing conditions which induced different evolution of plasma. Signal processing algorithm considering intensity ratio will be discussed to improve classification accuracy for an industrial recycling by reducing the effects of focusing condition changes.

어린이집 원장의 보육교사 실습지도에 대한 인식과 개선방안 연구

홍성호(Sungho Hong),강혜원(HyeWon Kang),김애숙(Aesook Kim),김유진(Yoojin Kim),김정숙(Jeongsook Kim),김태정(Taejung Kim),양보경(Bokyung Yang),오혜정(Hyejeong Oh),유기미(Gimi Yoo),윤은미(Eunmi Yoon),이선미(Sunmi Lee),이재미(Jaemi Lee),최선숙 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.1

본 연구는 어린이집 원장의 보육실습지도에 대한 인식과 개선방안을 알아보기 위해 2018년부터 2020년까지 보육실습생을 지도한 23명의 원장을 대상으로 면담유형을 도출하고 8명과 심층 면담을 진행하고 분석하였다. 이를 위해 도출된 항목은 예비보육교사에게 요구되는 영역, 보육실습 지침서 관계영역, 보육실습지도 의미영역, 보육실습 개선방안 영역으로 분류되었고 면담준거를 설정하여 반구조화 된 면담지를 개발하였고 4명씩 2그룹으로 나누어 심층면담을 진행하였다. 수집된 자료는 전사하여 자료의 해석, 코딩, 분류 등의 유기적 데이터 분석을 하였고 파랑새 2.0를 이용하였다. 연구결과 첫째, 예비보육교사에게 요구되는 영역에서 열정적 태도, 긍정적 자아개념, 인·적성을 갖춘 전문적인 교사 자질의 필요성을 인식하였다. 둘째, 보육실습 지침서 관계영역에서 개정교육과정에 맞는 수정, 보완 후 현장적용의 필요성과 서류와 일지의 일원화, 간소화의 필요성을 인식하였다. 셋째, 보육실습지도 의미영역에서 짧은 교육과정을 이수한 보육실습생의 전문적 자질 부족과 실습지도의 어려움으로 자격과정을 3년제 이상으로 확대하여야 함과 복수전공 자격취득제도 철회의 필요성을 인식하였다. 넷째, 보육실습 개선방안 영역에서는 인·적성 검사도입, 예비보육교사 자격 강화, 보육실습 기준안 마련, 면접시스템 도입, 보육실습 지도교사의 처우개선, 보육실습 지침서의 활용도 있는 개정의 지원이라는 정책적 시사점을 제시하였다. In this study, in order to find out how the daycare center directors perceived childcare practice guidance and how to improve it, interview types were derived from 23 directors who taught childcare interns from 2018 to 2020, and conducted and analyzed in-depth interviews with 8 people. The items derived for this were classified into areas required for pre-service nursery teachers, related areas for childcare practice guidelines, meaning areas for childcare practice guidance, and areas for improvement measures for childcare practice, and developed semi-structured interview sheets by setting the interview criteria. The in-depth interview was divided into two. The collected data was transcribed to analyze organic data such as data interpretation, coding, and classification, and Bluebird 2.0 was used. As a result of the study, first, the need for professional teacher qualities with passionate attitude, positive self-concept, and personality and aptitude was recognized in the areas required for pre-service nursery teachers. Second, the need for field application after revision and supplementation in accordance with the revised curriculum in the related areas of the childcare practice guideline and the necessity of unifying and simplifying documents and journals were recognized. Third, in the field of childcare practice guidance, the need to withdraw the dual-major qualification acquisition system was recognized because of the lack of professional qualities and difficulty in training the childcare trainees who completed the short curriculum. Fourth, in the area of improvement measures for childcare practice, policy implications such as introduction of personality and aptitude tests, reinforcement of pre-service childcare teacher qualifications, preparation of childcare practice standards, introduction of an interview system, improvement of the treatment of childcare practice supervisors, and the use of childcare practice guidelines are supported. Presented.

비행임무 소프트웨어의 재사용성 및 성능 향상을 위한 GOF 디자인 패턴의 적용 사례

홍성호(Sungho Hong),신상면(Sangmyeon Shin) 한국정보과학회 2016 한국정보과학회 학술발표논문집 Vol.2016 No.12

기업가적 스마트 시티 모델 비판 -IBM 스마터 시티 청주·제주 보고서 분석을 중심으로

홍성호(Hong Sungho) 한국공간환경학회 2017 공간과 사회 Vol.27 No.2

이 연구는 글로벌 IT 기업이 주도하는 스마트 시티 모델의 실체를 비판적으로 고찰하는 데에 목적이 있다. 주된 연구 방법은 IBM 스마터 시티 청주 보고서 및 제주 보고서 분석이다. 보고서를 통해 고찰한 IBM 스마터 시티 모델은 지역성과 괴리되어 있고, 기업이 보유한 기술 마케팅에 치중한다. 보고서의 권고안은 대체로 “사실상 지역 전문가의 인터뷰 의견 취합”에 불과하고, 부분적으로 IBM이 보 유하고 있는 대시보드 등의 도시 서비스 제품 빛 서비스 기술 도입을 권고하는 수준이다. 결과적으로 지역의 관계자들은 보고서를 통해 당면한 도시 문제의 해 결책에 대한 도움을 받을 수 없었고, 권고안의 여러 사업 가운데 어떠한 사업에 대해서도 추진 동력을 형성할 수 없었다. 위와 같은 IBM 보고서에 대한 비판은 기업가적 스마트 시티 조성모델을 경계할 필요가 있다는 점을 시사한다. 지방정 부는 무비판적으로 기술기업에 의존할 것이 아니라 지역 생태계에 기초하여 주도 권을 가지고 이들을 활용하는 방식으로 접근해야 한다. The purpose of this study is to critically analyze the smart city model led by global IT firms. The main study method is content analysis of the Cheongju report and Jeju report drawn from IBM Smarter City Challenge Program. According to the analysis on the reports, IBM Smart City Model is divorced from locality and focuses on the technology marketing of a firm. The most of the recommendation in the reports is just “collection of interviews with local experts”, and partially includes urban service products like IBM dashboard and the introduction of service technology. On balance, through the reports, those concerned locally failed to have any helps for solutions to pending urban issues, and any drive force for any projects recommended was not created. Therefore, the critique of the IBM reports indicates that it is necessary to keep caution against the entrepreneurial smart city development model led by IT firms with the cooperation of a local government. It is required for a local government to make use of them with its leadership on the basis of local ecosystem, rather than to be dependent on technology firms without criticism.

선박화재예방을 위한 화재감지기술 연구

홍성호(Hong SungHo),박찬호(Park ChanHo),박상태(Park SangTae),유송현(Yu SongHyun) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-

This paper presents on the study of fire detection technology for marine fire protection. Fire produces a variety of changes in the surrounding environment. Fire detection system senses such change of heat, smoke and flame. A number of methods have been devised to detect early stage of fire in such systems. However, detecting precisely fire and reducing the number of false alarms are still a major challenge in developing a fire detection system. In this paper, CCTV visual fire detection system which is new fue detection system to protect marine fire is introduced. The system detects fire in ship precisely. And we analyze marine performance test criteria for fire detector.

Structural determination of sildenafil and its analogues in dietary supplements by fast-atom bombardment collision-induced dissociation tandem mass spectrometry

Ahn, Sungho,Hong, Joo Yeon,Hong, Moo Ki,Jang, Young Pyo,Oh, Myung Sook,Jung, Jee H.,Hong, Jongki John Wiley Sons, Ltd. 2009 Rapid communications in mass spectrometry Vol.23 No.19

<P>Sildenafil and its analogues, which are used as illegal additives in several dietary supplements, were isolated by liquid-liquid extraction and column chromatography and analyzed by fast-atom bombardment mass spectrometry (FAB-MS). Structures of sildenafil and its derivatives were elucidated by FAB-tandem mass spectrometry (MS/MS) with exact mass measurement in the positive-ion mode. To find structurally diagnostic ions for the sildenafil analogues, authentic sildenafil was preferentially analyzed by high-energy collision-induced dissociation (CID)-MS/MS. The CID-MS/MS spectra of [M+H]<SUP>+</SUP> precursor ions resulted in the formation of numerous characteristic ions via a series of dissociative processes. The product ions formed by CID provided important information on the modification of the piperazine ring, the phenylsulfonyl group and the pyrazolopyrimidine moiety of sildenafil. By interpreting their MS/MS spectra, the chemical structures of sildenafil analogues isolated from dietary supplements could be elucidated and fragmentation patterns were proposed. To clearly identify the sidenafil derivatives in dietary supplements, some of the derivatives such as acetildenafil, homosildenafil and hydroxyhomosildenafil which are not commercially available were synthesized and compared with their MS/MS spectra. In addition, high-resolution mass measurements were conducted to obtain the elemental compositions of sildenafil and its analogues. Copyright © 2009 John Wiley & Sons, Ltd.</P>

보육실습에서 경험한 예비보육교사의 스트레스에 관한 연구

홍성호(Sungho Hong),강혜원(HyeWon Kang),유미림(Mirim Yu) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.19

본 연구는 보육실습에서 경험한 예비보육교사의 스트레스를 알아보기 위해 2019년에 진행한 보육실습에서 227명의 예비보육교사 스트레스 유형을 분석하였다. 도출된 항목은 교사역할영역, 실습평가영역, 실습환경영역, 교사·원장 및 동료실습생과 관계영역으로 분류되었고 면담준거를 설정하여 반구조화 된 면담지를 개발하여 4명씩 2그룹으로 심층면담을 2회 진행하였다. 수집된 자료는 전사하여 자료의 해석, 코딩, 분류 등의 유기적 데이터 분석을 하였고 파랑새 2.0를 이용하였다. 연구결과 첫째, 교사역할영역에서 상호작용과 문제행동 대처, 서류와 일지, 학부모 응대, 낮잠, 식사지도에서 스트레스를 인식하였고 둘째, 실습평가영역에서 불분명한 피드백과 지도방법, 평가, 보육실습의 관리체계 부족을 어려움으로 인식하였다. 셋째, 실습환경영역에서 휴게시간 보장, 교사실 및 휴식공간 부족, 개인비용 지출의 부담을 스트레스로 인식하였고 넷째, 원장 및 동료실습생과 관계영역에서는 지시, 비교, 잡무, 예측불가 상황의 초과근무, 업무가중, 소통단절, CCTV를 스트레스로 인식하였다. This study analyzed the stress types of 227 pre-care teachers in pre-care education in 2019 to find out the stress of pre-care teachers experienced in child-care practices. The derived items were categorized into teacher role area, practice evaluation area, practice environment area, teacher/president, and fellow trainees, and developed semi-structured interview papers by setting interview criteria. Proceeded. The collected data was transferred and analyzed organic data such as data interpretation, coding, and classification, and Bluebird 2.0 was used. Results of the study First, in the role of teacher, interaction and problem behavior coping, documents and journals, parent interaction, nap, and eating guidance were perceived stress. Second, in the practice evaluation area, unclear feedback and instruction, evaluation, and management of childcare practices System shortage was recognized as a difficulty. Third, in the practice environment area, rest time guarantee, lack of teacher room and rest space, and personal expenses were perceived as stress. Fourth, in the area related to the director and fellow trainees, overtime work in the direction of instruction, comparison, mishandling, and unpredictability, I perceived work weighting, communication disconnection, and CCTV as stress.

초산과 n-heptane 이성분계의 회합성에 대한 화학적 이론을 이용한 연구

홍승호(Sungho Hong),이진엽(Jinyub Lee),이태종(Taejong Lee) 한국가스학회 2000 한국가스학회지 Vol.3 No.3