스마트폰 어플리케이션을 이용한 초등사회과 지도학습의 효과

김현준 ( Hyun June Kim ),남상준 ( Sang Joon Nam ) 한국교원대학교 초등교육연구소 2013 초등교과교육연구 Vol.18 No.-

놀이수업을 수행하는 과정에서 스마트폰에 있는 어플리케이션(Application)을 활용하여 학생들이 지리적 정보(방위, 거리, 축척)를 이해하고 해석하도록 하였고 이러한 방법으로 지도 학습이 이루어질 때 학생들의 독도(map reading) 능력과 판독(map interpretation) 능력에 긍정적 영향을 줄 수 있는지 알아보고자 하였다. 본 연구에서는 초등학교 4학년 학생 27명을 대상으로, 사회 교과 ‘우리 지역의 자연환경과 생활 모습’ 단원에 대한 수업 시 GPS & GIS 기반 스마트폰 어플리 케이션을 활용하여 진행한 수업의 효과를 파악하고자 하였다. 총 6회의 학습 프로그램을 통해 지도 읽기의 기본 요소 중 방위, 거리, 축척 등에 대한 이해도를 테스트하였고 그 결과를 비교하였다. 또한 학생들이 지속적으로 수업에 흥미를 가질 수 있도록 놀이와 게임을 이용한 협동학습 중심으로 하여 ‘스마트폰 어플리케이션 활용과 학습자들이 능동적이고 상호 활발한 활동과의 교육적 결합’이라는 관점으로 연구 활동을 구성하였다. 연구 결과 스마트폰 어플리케이션 활용은 GPS를 기반으로 하기 때문에 정확한 데이터를 바탕으로 실제적인 지도 해석과 분석을 가능하게 하였다. 또한 스마트폰 어플리케이션 자체가 학습 동기를 유발하면서 집중력을 높이는 데 도움을 주었고, 자신이 속한 지역사회에서 이루어지는 활동이기 때문에 자기 지역에 대한 이해를 높일 수 있었다. 스마트폰 어플리케이션을 활용한 놀이 수업은 경험에 의한 학습으로 장기기억으로의 변환에 도움을 줄 수 있고 교사의 평면적 자료와 언어적 설명만으로는 학생들이 이해하기 어려운 부분에 대해 보완적 역할을 할 수 있을 것으로 사료된다. I instructed students to understand and interpret geographical information (direction, distance, and scale) using a smartphone application during a playing class and examined if this map learning method could have positive effects on students` map reading and interpretation skills. In this study, I determined the effects of the learning method using a smartphone application based on GPS & GIS by applying it to 27 students in fourth grade in elementary school during the class covering ‘The Natural Environment and Lifestyle of Our Region,’ a lesson in the Social Studies textbook. I tested the levels of the students` understating of direction, and scale among basic factors of map reading through the learning program composed of six sessions and compared the test results. Moreover, I planned a research activity based on the perspective of ‘educational combination of the use of a smartphone application and learners’ active, interactive activities` focusing on cooperative learning based on play and games to keep students interested in classes. The results revealed that the use of the smartphone application enabled practical map interpretation and analysis based on accurate data as the application was based on GPS. In addition, the application itself provided the students with learning motivation and helped enhance their concentration. Moreover, the students could improve their understanding of their region because the learning program was conducted within the community they belong to. A playing class using a smartphone application, which is an experience-based learning method, is expected to help convert students` memories into long-term ones and complement teachers` instruction on areas where students find it difficult to understand subjects depending solely on teachers` two-dimensional materials and verbal explanations.

실시간 고속 얼굴인식을 위한 임베디드 시스템 구현

이상구(Sang-Gu Lee),김현준(Hyun-June Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

For face recognition, until now, many methods are proposed. However, most of them are complex and have very many computations, so they are not efficient to the real-time face recognition and surveillance systems. In this paper, we implement a real-time high-speed embedded system on the DSP 6416 board by using vector quantization method.

Endothelin-1에 의한 phospholipase C 활성화와 세포내 Ca2+ 이동에 미치는 protein kinase 들의 효과

조중형(Jung Hyung Cho),김현준(Hyun Jun Kim),이윤혜(Yun Hye Lee),박진형(Jin Hyoung Park),장용운(Youn Un Jang),이승준(Seung June Lee),이준한(June Han Lee),윤정이(Jeong Yi Yoon),김창종(Chang Jong Kim),심상수(Sang Soo Sim) 대한약학회 2000 약학회지 Vol.44 No.2

To investigate the effects of protein kinases on endothelin-l-induced phospholipase C activation and Ca2+ mobilization in Rat-2 fibroblast, we measured the formation of inositol phosphates and intracellular Ca2+ concentration with [3H]inositol and Fura-2/AM, respectively. Endothelin-1 dose-dependently activated phospholipase C and increased intracellular Ca2+ concentration. Protein kinase C activator, PMA, significantly inhibited both phospholipase C activity and Ca2+ mobilization induced by endothelin-1. Tyrosine kinase inhibitor, genistein, inhibited both. On the other hand, cyclic nucleotide (cAMP and cGMP) did not have any influence on the signaling pathway of phospholipase C-Ca2+ mobilization induced by endothelin-1. These results suggest that protein kinase C and tyrosine kinase counteract on the signaling pathway of phospholipase C-Ca2+ mobilization induced by endothelin-1 in Rat-2 fibroblast.

관형 열교환기의 기계적 건전성 확보를 위한 유체-고체 연성해석과 브레이징 접합부의 국부적 물성분포 분석

강석훈(Seok Hoon Kang),박상후(Sang Hu Park),민준기(June Kee Min),정호승(Ho Sung Jeong),손창민(Chang Min Son),하만영(Man-Young Ha),조종래(JongRae Cho),김현준(Hyun Jun Kim) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.1

최근 환경적 요인으로 친환경 에너지나 효율성이 높은 에너지관리 기술에 관한 많은 연구가 진행되고 있다. 그 중에서 열교환기는 역사가 오래된 기계장치 이지만 최근 온실가스 저감을 위해 항공기 등에 응용을 시도함에 따라 그 가치가 증가하고 있다. 또한 이러한 열교환기가 항공기 엔진에 적용될 경우 고온, 고압의 조건을 견디어야 함으로 기계적 건전성 평가는 매우 중요하다. 따라서 본 연구에서는 관형 열교환기의 취약부인 브레이징 접합부의 국부적인 물성분포 분석과 유체-고체 연성해석을 통하여 구조적 안전성을 평가하였다. U자형 단일 곡관을 제작하여 해석과 실험을 통하여 신뢰성을 검증하였고 브레이징 조건 변경을 통하여 재료 분포를 확인하였다. Recent years have witnessed a strong need for eco-friendly and energy-efficient systems owing to global environmental problems. A heat exchanger is a well-known mechanical rig that has long been used in many energy systems. The use of a heat exchanger in an airplane engine has been attempted. In this case, the heat exchanger should be redesigned to be compact, lightweight, and highly reliable, and the issue of mechanical integrity gains importance. Therefore, in this study, we proposed a method for evaluating the mechanical integrity of a tube-type heat exchanger. A U-shaped single tube was used as an example, and its behavior and stress distribution were studied using fluid-structure interaction (FSI) analysis.

고세장비 연속주름을 갖는 박판구조물 제작을 위한 다단성형공정 개발

최성우(Sung-Woo Choi),박상후(Sang Hu Park),정호승(Ho Seung Jeong),민준기(June Kee Min),정재헌(Jae-Hun Jeong),조종래(Jong-Rae Cho),김현준(Hyun June Kim),폴윌리암(Paul Willians) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.2

스탬핑 프로세서는 고생산성과 낮은 가격으로 인해 자동차 차제나 항공기 부품, 그리고 전자제품 등 다양한 장치에 널리 이용된다. 최근에 에너지 산업과 연관되어 연료전지 분리판, 열교환기 등에 사용되는 주름구조를 가지는 박판의 응용이 급속히 증가되고 있다. 그러나 복잡한 형상 때문에 주름구조물을 한번의 성형으로 만들기가 매우 어렵다. 따라서 본 연구에서는 다단성형공정을 이용하여 성형성을 향상시키는 방법을 제안하였다. 1 차 박판성형 후 열처리를 통하여 가공경화 부분을 제거하고 다시 성형하는 방법으로 복잡하고 실용성이 높은 박판구조물 제작이 가능하도록 하였다. 본 연구에서는 제안한 방법을 검증하기 위하여 판형 열교환기에 응용이 가능한 두께 100 ㎛를 가지는 박판주름구조를 제작하고 공정변수를 연구하였다. The stamping process is widely used in fabricating various sheet-parts for vehicle, airplane, and electronic devices due to its low processing cost and high productivity. Recently the use of thin sheets with corrugated structures has rapidly increased for the production of energy devices, e.g., heat exchangers and fuel cells. However, it is very difficult to make corrugated structures directly in the stamping process due to their geometrical complexity. To solve this problem, this paper proposes a multi-step stamping process with a combined heat treatment process: a sequence of the first stamping, heat treatment, and second stamping. By multi-stamping, we obtained successful results in fabricating very thin corrugated structures with thicknesses of 100 ㎛; these are applicable as part of a plate-type heat exchanger.

고세장비 연속주름을 갖는 박판구조물 제작을 위한 다단성형공정 개발

최성우(Sung-Woo Choi),박상후(Sang-Hu Park),정호승(Ho Seung Jeong),조종래(Jong-Rae Cho),민준기(June Kee Min),김현준(Hyun June Kim),폴 윌리암(Paul Willians) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11

Stamping process is widely used in the fabrication of various sheet-parts for vehicle, airplane, and electronic devices by the merit of low processing cost and high productivity. Among the sheet metal parts, in recent the use of thin sheets having corrugated structures is rapidly increased with relation to the energy devices; for instance, heat exchanger and fuel cell. However, it is very difficult to make the corrugated structures directly in the stamping process due to their geometrical complexity. To solve this problem, multistep stamping (MSS) process was proposed in this work; sequential lineup as the 1<SUP>st</SUP> stamping, heat treatment, and the 2<SUP>nd</SUP> stamping. By the MSS, we got successful results in the fabrication of very thin corrugated structures which can be applicable to a plate-type heat exchanger.

KCl과 phenylephrine에 의한 대동맥 수축에서 Ca2+ 길항제와 protein kinase 억제제들의 비교 효과

심상수(Sang Soo Sim),문성원(Sung Won Moon),이윤혜(Yun Hye Lee),이정근(Jung Keun Lee),김현준(Hyun Jun Kim),박진형(Jin Hyoung Park),이준한(June Han Lee),조중형(Jung Hyung Cho),김창종(Chang Jong Kim) 대한약학회 1999 약학회지 Vol.43 No.5

To investigate the difference of contractile mechanism between KCl and phenylephrine-induced contraction, we observed effects of Ca2+ antagonists and protein kinase inhibitors on aorta contraction of rats. Verapamil dose-dependently inhibited the contraction induced by KCl and pheylephrine, the inhibitory effect of verapamil was more potent in KCl-induced contraction than phenylephrine-induced contraction. Econazole and TMB-8 significantly inhibited KCl-induced contraction but did not inhibit phenylephrine-induced contraction. Staurosporine dose-dependently inhibited both KCl and phenylephrine-induced contraction. Genistein and calmodulin antagonists (W-7 and trifluoperazine) also inhibited both contraction in a dose dependent manner. However, the inhibitory effects of genistein and calmodulin antagonists were more potent in pheylephrine-induced contraction than KCl-induced contraction. These results suggest that involvements of Ca2+ channel and protein kinase in rat aorta contraction were dependent on agonist causing aort smooth muscle contraction.

Caerulein과 총담췌장관 결찰에 의한 급성췌장염 모델의 특징

심상수,김현준,이윤혜,박진형,이승준,김창종 중앙대학교 약학연구소 2000 약학 논총 Vol.14 No.-

To investigate the difference in acute pancreatitis experimentally induced by common bile-pancreatic duct (CBPD) ligation and caerulein iv infusion, we measured amylase activity, pancreatic edema and phospholipase A_2 activity in pancreatic tissue and serum. In acute pancreatitis induced by CBPD ligation and caerulein infusion, tissue edema and tissue phospholipase A_2 activity significantly increased as compared with normal group. Also experimental acute pancreatitis significantly increased the levels of serum protein, serum amylase activity and serum phospholipase A_2 activity. In the comparison of two experimental models, the symptom of acute pancreatitis induced by CBPD ligation was more severe than that induced by caerulein infusion. These results indicate that the increase of phospholipase A_2 activity in pancreatic tissue and serum may be one of the parameters for the diagnosis of acute pancreatitis.