기업 e-Learning 프로그램 참여자가 인식하는 교수설계수준과 학습전이의 관계

곽지훈,김진모 한국농업교육학회 2007 농업교육과 인적자원개발 Vol.39 No.3

이 연구는 e-Learning에서 기업체 근로자들의 학습전이와 관계가 있는 기업 e-Learning 프로그램의 설계변인들을 실증적으로 검증하고 이 변인들의 설명력을 파악하는 목적으로 수행되었다. 이 연구의 모 집단은 e-Learning을 실시하고 있는 기업에 재직 중인 근로자 중 최소 2∼6개월 전에 사내 e-Learning을 경험한 근로자들이며 판단 표집(judgemental sampling)에 따라 e-Learning 전문가와 기업교육전문가의 추천을 받아 사내에서 e-Learning을 실시하고 자체적으로 운영하고 있는 1Q개n의 대기업 근로자를 표본으로 선정하였다. 자료 수집은 2006년 4월 27일부터 5월 30일까지 우편조사와 방문 조사, e-mail 조사를 통하여 이루어졌는데,총 500부의 설문지가 배포되었고,최종분석에는 206부의 설 문지가활용되었다. 이 연구의 결과는 다음과 같다. 첫째,선행연구에서 중요하게 다루었던 변인 중 직무경험년수와 프로그램 유형에 따른 학습전이의 차이는 없는 것으로 확인되었다. 둘째,e-Learning 유형에 따른 예측변인들은 정보획득유형의 경우,도입과 학습지원 변인이었고,반응강화유형의 경우에는,학습객체와 학습지원 변인이였으며,지식구성유형의 경우,학습지원과 도입 변인 이었다. 셋째,모든 유형에서 학습상황 및 방향제시 변인이 학습전이수준을 유의하게 설명하는 예측변인으로 확인되었다. 넷째,학습전이수준을 유의하게 설명하는 예측변인들은 정보획득유형의 경우,접근성과 표현 설계 변인이었고,반응강화유형의 경우에는 동기화와 접근성 변인이었으며,지식구성유형의 경우에 는 동기화,피드백 및 적합,학습 목적 일치 변인이었다. 다섯째, 학습전이수준을 유의하게 설명하는 예측 변인들은 정보획득유형의 경우,자료 제공 변인이었고 반응강화유형의 경우에는 교수자 지원과 도움 및 도움문서 변인이었으며,지식구성유형의 경우에는 수행지원도구 제공과 도움 및 도움문서 변인이었다. The purpose of this study was to determine the level of corporate employee's perception about Instructional Design for corporate e-Learning and the level of the Perceived Learning Transfer, and to determine the relationship between Instructional Design for corporate e-Learning and Perceived Learning Transfer. The participants of this research were the employees who have attended corporate e-Learning within 6 months, but some employees who have been taking e-Learning within 2 Months were excluded. And this corporate e-Learning was held by the company. Using judgemental sampling technique, 500 corporate employees of 10 companies were sampled for the study. A survey questionnaire consisting of the Instructional Design for corporate e-Learning scale based on L0RI(Learning Object Review Instrument) 1.5 by Vargo, Nesbit, Belfer, & Archambault(2003), Vargo, Nesbit, Belfer, & Archambau1t(2003)'s 0LES(0nline Learning Environment Survey), and UIDH(Usabi1ity and Instructional Design Heuristics) by Reeves et1.(2002), Learning transfer scale by Lee(1995), and demographic questions was used. Based on the findings and conclusions of this study, some recommendations for future researches were made as follows: 1. Future research should be followed by more specific classifications for the other variables in learning transfer. 2. Future research should seek some sophisticated and various methods in measurement for learning transfer. 3. Future research should find some possible factors of learning transfer effect which only relate to e-Learning by experimental study.

퍼지제어기를 이용한 분산 Multi Vehicle의 Color인식을 통한 물체이송 연구

우지민,경제문,최승민,김훈모 기계기술연구소 2000 성균관대학교 논문집 기계기술편 Vol.2 No.1

In this paper, we present a collaboration method for material delivery with distributed vehicle agents system. Generally used AGV(Autonomous Guided Vehicle) systems in FA need extraordinary facilities like guidepaths, landmarks and have lots of limitation for applying in various environments and in case of controlling multi vehicles including different types is increasing nowadays for automation of materials between vehicles including different types is increasing nowadays for automation of material of material flow. Thus to compensate and improve functions of AGV, it is important to endow vehicles with intelligence to recognize environments, goods and determine goal point to approach. In this study we propose interaction method between hetero-type vehicles and fuzzy logic controller for sensor based path planning method and material identifying method by recognizing color. For the purpose of carrying materials to the goal, instead of intricate vision system, simple color sensor is used to search for material, and recognize its color to determine goal point to transfer it to. The ability for proposed method will be demonstrated by computer simulation and experiment.

Bushing을 이용한 광대역 마이크로스트립 안테나 설계

양진모,최지훈 대구대학교 2006 대구대학교 학술논문집 Vol.1 No.2

일반적인 마이크로스트립 안테나는 높은 Q값으로 인해 5% 이내의 대역폭을 가진다. 이는 마이크로스트립 안테나의 가장 큰 단점이라 할 수 있다. 협대역이라는 문제점을 해결하기위하여 낮은 유전율의 기판을 사용하고, 유전체의 두께를 증가시키면서 부싱(bushing)을 삽입하는 방법을 이용하였다. 부싱은 유전체의 높이가 증가하면서 SMA 커넥터가 가지는 인덕턴스 성분을 제거하는 역할을 하게 된다. 유전체의 높이가 25mm일 때 부싱을 삽입하여 약 12%(114MHz)의 대역폭을 얻었다. A standard microstrip antenna has bandwidth within 5% because of high Q. This is the biggest shortcoming of microstrip antenna. In this paper, the method of inserting a bushing to the thick microstrip antenna with low permittivity substrate is proposed to improve the bandwidth of microstrip antennas. The bushing effectively removes the inductance of SMA connector that occur as the height of substrate increases. When the proposed busing technique is applied to the microstrip antenna whose thickness of dielectric substrate is 25mm, the bandwidth of almost 12%(114MHz) was obtained.

히스토아크릴을 이용한 십이지장 궤양 출혈의 지혈 후 발생한 급성췌장염

유재훈,문원,노지훈,구동영,조영화,김기수,윤준모 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.1

Upper gastrointestinal bleeding is common and potentially life threatening medical emergency. Emergency endoscopy is the first choice of diagnostic and treatment measure for patients with active upper gastrointestinal bleeding. Histoacryl should be considered a second-line treatment modality when conventional treatments were failed. However, it might cause several complications. Herein, we report a case of acute pancreatitis developed after histoacryl injection therapy for active duodenal ulcer bleeding. A 71-year-old man was admitted with melena and hematemesis. On emergency endoscopy, a 2 cm sized active ulcer with bleeding from an exposedvessel was seen at the duodenal bulb. Attempts to arrest the bleeding with hemoclipping and submucosal epinephrine injection were tried, but failed. We changed the method to endoscopic histoacryl injection, and obtained hemostasis immediately. A few hourslater, after successful hemostasis, patient complained diffuse abdominal pain. Ultrasonography revealed hyperechoic heterogenous diffuse pancreatic enlargement and right pararenal space fluid collection, this ultrasonographic findings and elevated serum pancreatic enzymes are compatible with acute pancreatitis.

T cell transcriptional factors in allergic rhinitis and its association with clinical features

Mo, Ji-Hun,Chung, Young-Jun,Kim, Ji Hye Asia Pacific Association of Allergy, Asthma and Cl 2013 Asia Pacific allergy Vol.3 No.3

<P><B>Background</B></P><P>Th2 cells are crucially important in allergic disease and the possible involvement of Treg and Th17 cells has not been clearly identified.</P><P><B>Objective</B></P><P>To identify the mRNA expression of T cell transcription factors in nasal mucosa in patients with allergic rhinitis (AR) and to reveal their correlations with clinical features.</P><P><B>Methods</B></P><P>Eighteen patients with AR and 12 controls with turbinate hypertrophy were included. mRNA expression of the following transcriptional factors in nasal mucosa were measured by quantitative polymerase chain reaction; T-bet (Th1), GATA3 (Th2), retinoic acid-related orphan receptor C (RORC; Th17), and forkhead box P3 (Foxp3; Treg). mRNA expression was compared among groups and correlation between mRNA expression level and clinical features (rhinitis symptoms, eosinophil count, and IgE) were also investigated.</P><P><B>Results</B></P><P>GATA3 and RORC were significantly increased and Foxp3 was significantly decreased in the AR group. Moderate-to-severe AR group also had increased expression of GATA3 and RORC than mild AR group, suggesting severity of AR influence expression of transcription factors. Correlation analysis showed that none of these transcription factors were associated with severity of clinical symptoms, eosinophil counts and skin prick test severity and that IgE level was significantly correlated with expression level of GATA3 and RORC, suggesting an association of IgE production with Th2 and Th17 cells.</P><P><B>Conclusion</B></P><P>Increased mRNA expression of GATA3 (Th2), increased expression of RORC and decreased expression of Foxp3 may be important in pathogenesis of AR. GATA3 and RORC may be closed related with IgE level.</P>

HIF-1α and HSP90: target molecules selected from a tumorigenic papillary thyroid carcinoma cell line.

Mo, Ji-Hun,Choi, Ik J,Jeong, Woo-Jin,Jeon, Eun-Hui,Ahn, Soon-Hyun Japanese Cancer Association 2012 Cancer Science Vol.103 No.3

<P>It is important to properly identify aggressive tumors among differentiated thyroid cancers that are most often indolent. By comparison of a tumorigenic clone with an originally less tumorigenic papillary thyroid carcinoma (PTC) cell line, we looked for markers involved in the aggressive biology of thyroid cancer. Human PTC cell lines BHP10-3 and its tumorigenic subclone BHP10-3SC(mice) were compared using microarray analysis. Upregulated genes in the tumorigenic clone were selected for RT-PCR, immunoblot analysis and immunohistochemistry in human tissue. Hypoxia-inducible factor (HIF)-1α and its chaperone protein heat shock protein (HSP)90 showed significantly increased expression in BHP10-3SC(mice) and human PTC tissue. These two genes, HIF-1α and HSP90, were further validated using siRNA gene knockdown, pharmacological inhibition using 17-N-allylamino-17-demethoxygeldanamycin (17-AAG), an inhibitor of both HSP90 and HIF-1α and in vivo orthotopic animal model. Invasiveness of BHP10-3SC(mice) was abrogated by blockade of HIF-1αin vitro by both siRNA and 17-AAG. The same finding was demonstrated in the orthotopic animal model. These findings support that HIF-1α is important in tumorigenesis of PTC and that it may serve to be an important target for identification and treatment of aggressive tumors.</P>

소아 비알레르기비염의 임상 양상

모지훈 ( Ji Hun Mo ) 대한천식알레르기학회 2015 Allergy Asthma & Respiratory Disease Vol.3 No.5

알레르기질환에서의 Type 2 Innate Lymphoid Cell의 역할

모지훈 ( Ji Hun Mo ) 대한천식알레르기학회 2012 천식 및 알레르기 Vol.32 No.4

Innate lymphoid cells have recently been identified to be a cell population that has morphology typical of lymphocytes but lacks rearranged antigen receptors. It can be classified into RORγt innate lymphoid cell, type 2 innate lymphoid cells and natual killer cells. Among them, type 2 innate lymphoid cells plays an important role in type 2 immunity by releasing type 2 cytokines, such as interleukin-5 and interleukin- 13, and makes a match for Th2 cell of the adaptive immune system. Type 2 innate lymphoid cells responses are initiated by interleukin-25 and interleukin-33, which are produced by several cell types, such as epithelial cells, tissue macrophages and dendritic cells. These cytokines strongly activate type 2 innate lymphoid cells, leading to the production of type 2 cytokines, including, interleukin-5 and interleukin- 13. In this review, we will discuss the characteristics and development of type 2 innate lymphoid cells and the role of type 2 innate lymphoid cells in allergic diseases in detail.

딥러닝 합성곱에서 데이터 재사용에 최적화된 GPGPU 설계

남기훈(Ki-Hun Nam),이광엽(Kwang-yeob Lee),정준모(Jun-Mo Jung) 한국전기전자학회 2021 전기전자학회논문지 Vol.25 No.4

본 논문은 합성곱 신경망에 데이터 재사용 방법을 효과적으로 적용하여 연산 횟수와 메모리 접근 횟수를 줄일 수 있는 GPGPU구조를 제안한다. 합성곱은 kernel과 입력 데이터를 이용한 2차원 연산으로 kernel이 slide하는 방법으로 연산이 이루어 진다. 이때, 합성곱 연산이 완료될 때 까지 kernel을 캐시메모리로 부터 전달 받는 것이 아니고 내부 레지스터를 이용하는 재사용 방법을 제안한다. SIMT방법으로 명령어가 실행되는 GPGPU의 원리 이용하여 데이터 재사용의 효과를 높이기 위해 합성곱에 직렬 연산 방식을 적용하였다. 본 논문에서는 레지스터기반 데이터 재사용을 위하여 kernel을 4x4로 고정하고 이를 효과적으로 지원하기 위한 warp 크기와 레지스터 뱅크를 갖는 GPGPU를 설계하였다. 설계된 GPGPU의 합성곱 신경망에 대한 성능을 검증하기 위해 FPGA로 구현한 뒤 LeNet을 실행시키고 TensorFlow를 이용한 비교 방법으로 AlexNet에 대한 성능을 측정하였다. 측정결과 AlexNet기준 1회 학습 속도는 0.468초이며 추론 속도는 0.135초이다. This paper proposes a GPGPU structure that can reduce the number of operations and memory access by effectively applying a data reuse method to a convolutional neural network(CNN). Convolution is a two-dimensional operation using kernel and input data, and the operation is performed by sliding the kernel. In this case, a reuse method using an internal register is proposed instead of loading kernel from a cache memory until the convolution operation is completed. The serial operation method was applied to the convolution to increase the effect of data reuse by using the principle of GPGPU in which instructions are executed by the SIMT method. In this paper, for register-based data reuse, the kernel was fixed at 4x4 and GPGPU was designed considering the warp size and register bank to effectively support it. To verify the performance of the designed GPGPU on the CNN, we implemented it as an FPGA and then ran LeNet and measured the performance on AlexNet by comparison using TensorFlow. As a result of the measurement, 1-iteration learning speed based on AlexNet is 0.468sec and the inference speed is 0.135sec.

통계 데이터로 분석하는 지상파 UHD 방송

장지훈(Jang, Ji-hun),고우종(Koh, Woo-jong),김공탁(Kim, Gong-tak),최형욱(Choi, Hyung-wook),기훈석(Ki, Hun-seok),전흥배(Jun, Heung-bae),강승호(Kang, Seung-ho),조삼모(Cho, Sam-Mo),정효성(Jeong, Hyo-Sung) 한국방송·미디어공학회 2022 한국방송공학회 학술발표대회 논문집 Vol.2022 No.6

2022년은 세계 최초로 지상파 UHD 본방송이 2017년에 시작되고 5년이 경과한 시점이다. 이제는 과거의 추진 경과를 살펴보고 기술의 발전과 미디어 환경 변화에 필요한 정책을 새롭게 추진하는 노력이 필요한 시점이라고 할 수 있다. 2015년에는 “지상파 UHD 방송 도입을 위한 정책 방안”이 마련되고, 2020년에는 “지상파 UHD 방송 활성화 방안”이 수립되어 지상파 UHD 방송 추진의 중심 역할을 수행하였다. 시청자가 원하는 지상파 UHD 방송은 어떤 모습이고, 불편한 점은 무엇인지, 어떤 점을 개선해 주면 좋은지에 대한 질문과 그에 대한 답을 찾는 노력은 아쉬움이 남는다. 시청자들은 UHD 방송 화질에 만족하는지? HDTV를 UHD TV로 교체하기 위한 필요·충분조건은 무엇인지에 대한 질문의 답변을 지속적으로 분석할 필요가 있다. 지상파 방송사와 UHD KOREA는 그동안 조사한 시청자의 지상파 UHD 방송에 대한 통계자료를 분석하고 정리하였다. 이를 토대로 새로운 미디어 환경에 필요하고 UHD 미디어 정책 수립과 추진에 기여할 수 있는 시청자 조사와 분석을 지속적으로 추진하려고 한다.