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초등학생을 위한 라즈베리파이 기반 자율주행 자동차 교육 프로그램 운영 방안 연구
이대환,임은주,왕경은,이영석 제주대학교 지능소프트웨어 교육연구소 2023 지능정보융합과 미래교육 Vol.2 No.4
본 연구는 라즈베리파이 기반 자율주행 자동차를 활용하여 학생들이 객체 이미지 데이터를 어노테이션(Annotation)하고 컴퓨터 비 전 기반의 인공지능을 개발하는 인공지능 교육을 위한 캠프 프로그램을 제안하여 인공지능에 대한 올바른 인식과 함께 인공지능에 대 한 흥미와 이해도를 향상시키고자 한다. 본 교육 프로그램은 학생들이 직접 이미지 데이터를 생성하고 객체인식 모델을 활용해 자율자 동차에 적용해볼 수 있는 프로젝트 형태로 구성하였으며, 학생들의 수준을 고려하여 기계 학습 및 이미지 추론이 가능한 블록 코딩을 활용한다. 자율주행 자동차의 센서와 작동 원리를 개괄적으로 이해하고, 자율주행 자동차 제어에 필요한 기초적인 문법과 이미지 추론 방법을 익혀 자율주행 자동차를 주행하고자 한다. This study proposes a camp program for artificial intelligence education, utilizing a Raspberry Pi-based autonomous driving car, to enhance students' interest and understanding of artificial intelligence along with a correct perception of AI. The program aims to involve students in annotating object image data and developing artificial intelligence based on computer vision. The educational camp program is designed in a project format, allowing students to directly generate image data and create object recognition models to be applied to autonomous vehicles. Block coding, capable of machine learning and image inference, is employed, taking into consideration the students' proficiency levels. The program covers a broad understanding of the sensors and operating principles of autonomous vehicles, and it aims to familiarize students with basic syntax and image inference methods necessary for controlling autonomous driving cars.
성경적 토지법과 땅세경제 : 소유사회:땅의 사용 비용 땅의 생산물 =>영구적자경제
이대환 통합연구학회 1995 통합연구 Vol.8 No.3-4
God said, "Sell and buy the land(Lev. 25:15~16), but don't sell it forever(Lev.25:23)". In the actual economy, the above phrase is interperted as follows. The former part of the saying recognizes the rent market and the latter part recognizes the land-price market. If we are to satisfy these two conditions in the economic system, the land-lease system is suitable for the allocation of the land use. Jesus said in the parable of the vineyard that the vineyard of a farmer was a rented one from the landowner(Luke 20:9). He also taught that people were given equal opportunity for the use of the land and the products of the vineyard were divided equally (Matt. 20:1). This teaching indicates a new economic system under the Gospel which was once the land-use system under the Law. This passage stipulates the unreasonableness of the land-price market from the viewpoint of Biblical system of land. And it proposes the land-rent(tax) system as an alternative proposal. The core of the above passage is as follows: *land-price market : ownership land cost(P·i)>land products(R) ⇒ unbalanced economy (occurrence of economic, social, pollutional problems) *rent market : stewardship land cost(G) = land products(R) ⇒ balanced economy (justice and equalibrium, prevention of pollution)
미세전류 적용이 편평족을 가진 사람들의 보행근육 피로도에 미치는 영향
이대환,손호희,박수진,김진상,김경,Lee, Dae-Hwan,Son, Ho-Hee,Park, Soo-Jin,Kim, Jin-Sang,Kim, Kyoung 대한물리치료과학회 2011 대한물리치료과학회지 Vol.18 No.2
Purpose: The purpose of this study was to investigate the effect of microcurrent on fatigue of muscles in people who were flat-footed during gait. Methods: 10 flat-footed university students volunteered to participate in this study. 10 flat-footed subjects were divided into 2 groups, one group was experimental group of 5subjects(This group put on microcurrent induction shoes but the subjects were not able to feel the current.) and the other group was the control group of 5subjects(This group put on the general shoes which were similar in shape but microcurrent was not induced.) to perform double blind test and random sampling. Their gait muscle fatigue of 6 regions (vastus medialis, gastrocnemius, tibialis anterior, biceps femoris, erector spinae, and rectus abdominis muscle.) was measured by EMG MP150, Delsys Inc Boston, USA during walking and then they carried out the Harvard step with a platform (It was a arbitrarily made wooden platform of 100cm long, 50cm wide, 60cm high. They carried out climbing it for one second and descending it for one second by using the Metronome program, total 5minutes) for 5minutes. Right after that, the subjects walked on a treadmill at a speed of 4km/h for 10minutes and then their gait muscle fatigue of 6regions was assessed while they were walking on the ground as equally as before exercise. Results: The experimental group has resulted in lower average differences in gait muscle fatigue before and after exercise than those of the control group average 12.24Hz(P=0.009) at vastus medialis, average 8.52Hz(P=0.016) at gastrocnemius, average 9.16Hz(P=0.009) at tibialis anterior, average 8.66Hz(P=0.047) at biceps femoris, average 7.53Hz(P=0.016) at erector spinae, and average 7.80Hz(P=0.047) at rectus abdominis. All of the assessments of muscles have shown significant difference statistically. Conclusions: This result has shown that the use of micro current could decrease gait muscle fatigue of flat-footed people. It is recommended to use a microcurrent to reduce their gait muscle fatigue.
저인산혈염증과 심부전증으로 발현한 당뇨병성 케톤산증 환자 1예
이대환,정태식,김훈구,이경원,정효영,이강완,강석진,함종렬,최동주,정순일 대한당뇨병학회 2001 임상당뇨병 Vol.2 No.2
당뇨병성케톤산증의 치료중에 저칼륨혈증은 흔하지만 심한 저인산염혈증은 매우 드문 것으로 되어 있다. 이전 보고에서 0.32mmol/L 이하의 심한 저인산염혈증은 심근수축력을 감소시켜 울혈성 심부전을 일으키는 것으로 되어 있다. 평소 기저 심장질환이 없었던 34세 여자 환자가 당뇨병성케톤산혈증으로 내원하여 치료 경과도중 폐부종이 발생하였다. 당시 심초음파상 심근수축력의 감소와 혈중 인의 수치가 0.13mmol/L로 심한 저인산염혈증을 보였다. 인 보충 후에 심근수축력이 회복되었으며 심부전을 일으킬만한 다른 원인은 배제하였다. 이에 당뇨병성케톤산증의 치료 경과중 생긴 저인산염혈증에 의한 심부전을 경험하였기에 보고하는 바이다. Hypokalemia is comment observed during the treatment of diabetic ketoacidosis, but hypophosphatemia is relatively rare. Severe hypophosphatemia (0.32 mmol/L or below) might cause congestive heart failure due to decrease of myocardial contractility. In this reprt we observed that thirty four-year-old female had a pulmonary edema during the treatment of diabetic ketoacidosis. She had no cardiac problem before. We noted the decrease of cardiac wall motion and contractility in echocardiography and severe hypophophatemia(0.13 mmol/L). The myocardiac dysfunction of patient has been dramatically improved after the administration of phosphate via intravenous route. Here we report a case of hypophosphatemia developed during the treatment of diabetic ketoacidosis and heart failure related to hypophosphatemia.