초고속 카메라를 이용한 스페클 패턴 기반 미소 진동 분석

박태정,한성민,양희란,최장훈,송준영,최성록,이치범 한국소음진동공학회 2024 한국소음진동공학회 논문집 Vol.34 No.3

In this study, we present a method for measuring small amplitude vibrations using a high-speed camera. We project a laser onto an object to generate a speckle pattern that is then magnified using a lens and analyzed using a steerable pyramid. This vibration measurement method allows us to separate and measure vibrations based on the direction of the image. We demonstrated the effectiveness of our method by comparing it with traditional methods that do not generate a speckle pattern. Furthermore, we confirmed the validity of our methodology through frequency comparison experiments with a piezo accelerometer that is commonly used for vibration measurements. This novel approach to vibration measurement methodology can significantly advance research in this field.

Quantitative Studies of Carbohydrate-protein Interaction using Functionalized Bacterial Spores in Solution and on Chips

박태정,박종필,Seok Jae Lee,이상엽 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.1

Carbohydrate-protein interaction is one of the most important molecular events deemed critical for numerous biological processes. Therefore, understanding this interaction is essential. In this study, we used bacterial spore display techniques to present multiple copies of streptavidin on the surface of spores to explore carbohydrate-protein interaction in solution and on chips. By applying bacterial spores displaying streptavidin, we developed a new method which allows sensitive, versatile,and passive detection of carbohydrate-protein interactions with a 10-fold increase in sensitivity. The linear relationship of interactions between carbohydrates and labeled concanavalin A (con A) in solution and on functionalized bacterial spore chips has also been confirmed. To the best of our knowledge, this is the first example of development and characterization of binding behavior in carbohydrateprotein interactions using bacterial spore-displayed streptavidin. We believe this strategy may enable new highthroughput screening of carbohydrate interactions as well as establish a basis for monitoring inhibitors of carbohydrate-binding proteins when developing new drugs.

메이커 중심 교육 활성화를 위한 교원 연수 프로그램 효과 및 교사 요구사항 분석

박태정,차현진,Park, Taejung,Cha, Hyunjin 한국정보교육학회 2019 정보교육학회논문지 Vol.23 No.2

본 연구는 메이커 교육에 대한 교원 역량 강화 프로그램의 사례를 살펴봄으로써, 향후 메이커 중심 교육을 위한 교사 연수 프로그램 설계 및 실행에 대한 시사점을 도출하고 메이커 교육이 교육 현장에 정착하기 위한 방향을 탐색하는데 목적이 있다. 이를 위해 S구 교육지원청에서 제공한 메이커 교육 교원 연수 프로그램을 연구 문맥으로 설정하고, 5일간 구성된 교사 역량강화 연수 프로그램에서의 효과 분석과 연수 프로그램 후 교사들이 제안하는 메이커 중심 교육의 현장 정착 및 활성화를 요구사항을 도출하고자 양적 및 질적 연구를 수행하였다. 본 연구의 결과로부터 교육현장에서 혁신적인 교수 방법과 정책을 도입할 때 가장 중요한 역할을 담당하고 있는 교사들이 참여한 교원 연수 프로그램의 사례를 통해 교원 양성 프로그램 설계 방향과 메이커 중심 교육의 활성화를 위한 시사점을 도출하였다는 점에서 의의가 있다. This research aims to explore the direction to promote maker-centered education and draw implications on the design and practice of teacher's professional development program by studying a case. To achieve the research objective, the research context was set on a teacher's training program provided by the S district office of education in Seoul, and the quantitative and qualitative studies were conducted to deduce the teacher's requirements for establishing and promoting maker-centered education after participating in the program as well as analyzing the effectiveness of the 5-days training program. From the results, this study contributes to suggesting implications on activating maker-centered education and providing the curriculum and instructional designs of teacher's professional development through the case participated by teachers who play a crucial role in performing and practicing innovative teaching methods and educational policy in real educational contexts.

MEMS 가속도계를 이용한 주행 중 차량 진동 측정 IoT 모듈 개발

박태정,유영훈,조형진,송준영,조인제,이치범 한국자동차공학회 2023 한국 자동차공학회논문집 Vol.31 No.7

With the recent commercialization of electric-hydrogen vehicles and the development of vehicle parts, noise measurement of steering systems has become more important than engines or tires, which are the main causes of noise inside vehicles. This study was developed to determine the cause of noise generation by attaching an IoT Module to the engine room to measure vibration generated by the steering system of a driving vehicle.

위축성 비염과 동반된 기관기관지 골연골형성증 1예

박태정,한정욱,김도현,김보영 대한이비인후과학회 2011 대한이비인후과학회지 두경부외과학 Vol.54 No.11

Tracheobronchopathia osteochondroplastica (TO) is a rare benign disease of trachea characterized by numerous osseocartilaginous nodules protruding into the tracheobronchial lumen. The etiology of TO is unknown; however, an association with upper respiratory diseases such as atrophic rhinitis has been suggested. The authors report a case of TO with atrophic rhinitis with related literatures.

Nanobio-sensor platforms by using protein engineering

박태정 한국진공학회 2014 한국진공학회 학술발표회초록집 Vol.2014 No.8

교육의 미래를 바꿀 VR-러닝 활용 방안

박태정 한국공학교육학회 2017 공학교육동향 Vol.24 No.2

비유클리드 공간 분할을 위한 구면좌표계 기반 Octree의 특징과 한계 분석

박태정 한국디지털콘텐츠학회 2022 한국디지털콘텐츠학회논문지 Vol.23 No.2

To efficiently retrieve and store geometry information in three dimensional space, those partitioning grids including the octree and kd-tree defined in the Cartesian coordinates are often used. Unlike this, partitioning grids defined in non-Euclidean space are relatively not fully studied. In this paper, I present and discuss the features, applications, and limitations of a non-Euclidean space partitioning method, S-Octree, which is defined in the spherical coordinates to gain some insights for better methods. First, I show discontinuity issues that happen at near certain points. Then, I present how those numerical errors typically occur with angle-based geometry information processing algorithms affect S-Octree by experiments. Those errors can be accumulated by repeated conversions but I represent some cases where the accumulated errors converge to upper bounds. Also, I discuss the rotational invariance for those features required in better new non-Euclidean space partitioning methods. 3차원 공간에서 기하 정보의 효율적인 저장과 탐색을 위해 주로 직교좌표계에서 octree 또는 kd-tree 등과 같은 공간 분할 방식이 사용된다. 이에 비해, 비유클리드 공간 분할 방식은 내재된 잠재력과 가능성에도 불구하고 상대적으로 연구가 활발하지 않다. 본 논문에서는 비유클리드 공간 분할 방식인 구면좌표계 기반 octree(S-Octree)의 특성과 적용 분야, 한계를 살펴봄으로써 비유클리드 공간 분할 방식의 가능성과 발전 방향을 모색하고자 한다. S-Octree의 한계로 먼저 특정 영역에서 발생하는 불연속 문제를 논의하고 그 다음 각도 기반 기하 정보 처리 방식에서 흔히 발생하는 수치 오류가 S-Octree에서는 어떠한 양상으로 발생하는지 실험을 통해 살펴본다. 이러한 수치 오류는 연산이 연속적으로 수행됨에 따라 누적되는데 누적된 오류가 상한으로 수렴하는 사례들을 제시한다. 또한 보다 나은 새로운 비유클리드 공간 분할 기법에서 요구되는 회전 비의존성을 논의한다.

생체 흡수성 고정판을 이용한 경상악동 안와하벽골절 정복술에서 피브린 글루의 유용성

박태정,정태영,김보영,김석,김민준,권재환,조규섭,공수근 대한이비인후과학회 2017 대한이비인후과학회지 두경부외과학 Vol.60 No.2

Background and Objectives The purpose of this study was to evaluate the advantages and limitations of using fibrin glue for securing bioresorbable panels to reconstruct the fractured orbital floor by transantral approach. Subjects and Method A retrospective study was conducted from July 2009 to July 2015 in 35 patients with pure orbital floor fractures. Nineteen patients underwent reduction surgery for inserting the bioresorbable panel and 16 patients underwent reduction surgery using fibrin glue for securing the bioresorbable panel via a transantral approach. In both groups, a chart review of preoperative and postoperative ocular symptoms, operation records, and complications was conducted. Results There was no significant difference between two groups in the demographic data of patients. Comparing the surgical outcomes between two groups, diplopia and mean discrepancy between fractured bone chip and intact orbital floor based on computed tomography scans showed much better results in the group that used bioresorbable panel secured by fibrin glue than in the bioresorbable only group. Furthermore, we carried out revision operations in six cases in the bioresorbable panel only group, where we found that the main cause of fracture to be the dislocation of bioresorbable panel. On the other hand, in the bioresorbable panel secured by the fibrin glue group, there were no reoperation and postsurgical complications. Conclusion During the course of the study, we sensed orbital floor fracture repair using bioresorbable panel secured by fibrin glue via a transantral approach as an easy and effective technique with good postoperative results, and minimal implant related complications. This novel procedure is recommended as a surgical option for the reduction of orbital floor fractures, especially in large and posterior fractures. Korean J Otorhinolaryngol-Head Neck Surg 2017;60(2):69-75

LDA 토픽모델링을 활용한 역대 대통령 취임사에 내재된 정책기조 분석

박태정 서울사이버대학교 미래사회전략연구소 2023 미래사회 Vol.14 No.2

This study investigated the underlying policy direction encapsulated in the presidential inaugural addresses delivered by the 13 presidents who have led Korea since its establishment, focusing on those who assumed office in their 20s. The study applied various text analysis techniques, including Python programming-based Term Frequency (TF) and Term Frequency — Inverse Document Frequency (TF-IDF) analysis, word network analysis, and Latent Dirichlet Allocation (LDA) topic modeling to analyze the complete set of inaugural addresses. The study results indicated that the presidential speeches emphasized national and historical identity, the economy, culture, unification, and people’s everyday lives. Regarding policy direction, the LDA topic modeling analysis revealed four primary themes: the global economy and national development, liberal democracy and reform, national identity and politics, and citizen’s life and welfare. These policy orientations are derived from the desires and demands of the citizens, highlighting their importance in shaping government policies. Therefore, research should apply these findings to evaluate the policy performance of past administrations to facilitate subsequent studies. 본 연구는 역대 대통령 취임사에 내재한 정책 기조의 공통 주제를 찾는 것을 목적으로 하였다. 초대 이후 20대에 이르는 대통령들의 취임사 전체를 분석 대상으로 적용하여 파이선 프로그래밍에 기반한 TF, TF-IDF 분석, 단어네트워크 분석, LDA 토픽모델링을 실시하였다. 분석결과, 대통령의 언어에서 민족성과 역사성이 반복되어 나타났고, 경제, 문화, 통일과 국민의삶과 직결된 생활에 대한 강조가 두드러져 있었다. 핵심 연구 문제인 정책 기조의 공통주제에대한 LDA 토픽모델링 분석 결과 세계 경제와 국가발전, 자유민주주의와 개혁, 민족 역사성과정치, 시민 생활과 복지로 확인되었다. 이러한 정책 기조는 국민 욕구로부터 발현되고 있어서, 역대 정부별 정책 성과 평가에 적용하여 후속 연구가 이어져야 함을 제언하였다.