가스누출 감지용 실리콘 압저항형 절대압센서의 제조 및 온도보상

손승현,김우정,최시영 ( Seung Hyun Son,Woo Jeong Kim,Sie Young Choi ) 한국센서학회 1998 센서학회지 Vol.7 No.3

Silicon piezoresistive absolute pressure sensor for gas leakage alarm system was developed. This sensor must operate normally in the range of 0∼600 mmH₂O pressure, and 100 temperature. To make the most of this sensor for gas leakage alarm system, gas must not leak from the sensor itself when the diaphragm of the sensor fractures. Thus, the sealed diaphragm cavity was anodically bonded to Pyrex 7740 glass under the condition of 10^(-4) torr at 400 ℃. The sensitivity of developed sensor was 4.06 ㎶/VmmH₂O for 600 mmH₂O full-scale pressure range. And temperature compensation method of this sensor is to change bridge-input-voltage linearly in proportion to the temperature variation by using diode(YXIN4001) or Al thin film resistor. By these methods the temperature effect in the range of 0∼100℃ was compensated over 80% for offset drift, 95% for sensitivity.

아스퍼거 장애 아동을 위한 통합교육 전략

손승현 ( Seung Hyun Son ) 한국특수아동학회 2008 특수아동교육연구 Vol.10 No.1

한국 동해 연안해역에 출현하는 청어(Clupea pallasii)의 식성

손승현 ( Seung Hyun Son ),정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),김경률 ( Kyung Ryul Kim ),백근욱 ( Gun Wook Baeck ) 한국수산과학회 2022 한국수산과학회지 Vol.55 No.2

The feeding habits of the Pacific herring Clupea pallasii were examined based on 333 specimens collected from the coastal waters of the East Sea of Korea. Sampling was conducted in April, June, and September 2019 and February 2020. The total length of the C. pallasii ranged from 11.9 cm to 37.7 cm. Euphausiids (93.0%, index of relative importance, IRI), especially Euphausia, comprised the primary diet of the pacific herring, in addition to amphipods, copepods, and fishes. The dietary composition of C. pallasii showed non-significant differences by size. As body size of C. pallasii increased, the mean number of preys per stomach (mN/ST) and the mean weight of preys per stomach (mW/ST) tended to increase.

장애대학생 지원 프로그램의 연구동향과 실제

손승현 ( Seung Hyun Son ),이예다나 ( Ye Da Na Lee ),조성희 ( Sung Hee Cho ),문주영 ( Ju Yeong Moon ),마지성 ( Ji Sung Ma ),강민 ( Min Kang ) 안암교육학회 2013 한국교육학연구 Vol.19 No.2

본 연구에서는 장애대학생의 성공적인 대학생활을 위한 대학교육 전반에 걸친 지원 프로그램의 연구동향을 파악하고 분석하였다. 이를 통해 향후 대학 내 장애학생 대상 지원 프로그램에 대한 시사점을 도출하고 앞으로 나아갈 방향을 제안하고자 하였다. 본 연구의 분석 자료는 장애인 특수교육대상자 대학입학 특별전형제도가 시작된 1995년부터 2012년 12월까지 한국연구재단 등재 또는 등재후보지의 학술지에 발표된 총 38편의 논문을 선정하였다. 선정된 논문을 우선 입학 전, 대학생활 중, 졸업 후 취업을 위한 지원으로 나누고 연구방법, 연구대상, 지원 분야, 지원 내용의 세부 분야별로 구분하여 연구의 동향을 살펴보았다. 또한 연구논문에서 실제 지원 프로그램을 제공한 연구가 대학 현장에서 어떻게 활용되고 있는지 그 내용을 구체적으로 살펴보았다. 장애학생 지원을 위한 연구 동향을 살펴본 결과 제도적인 변화에 따른 요구가 연구에 반영되었으며, 연구주제는 실태조사가 대부분을 차지하였다. 연구대상은 시각장애와 청각장애 학생들을 대상으로 한 연구가 대다수였다. 실제적인 지원을 제공한 분야는 대학생활 중 교수-학습 지원이 가장 많은 비중을 차지하였다. 또한 입학 전?대학생활 중·졸업 후 취업을 위한 지원으로 볼 때 입학 전, 졸업 후에 비하여 대학생활 중과 관련된 논문이 다수를 차지하였다. 이러한 연구결과들을 토대로 향후 다양한 연구 분야와 대상을 확장하여 장애대학생을 위한 개별화된 지원서비스의 필요성 등을 제안하였다. The purpose of this study was to analyze the research trends on support for college students with disabilities and suggest diverse support service programs for college students with disabilities to be successful in college life. The search procedures using the Web-database system were implemented to find the proper research from 1995 to 2012. A total of 38 articles met the criteria for analysis and were included in this review. Each article was analyzed according to pre-college (transition to higher education), college (Success learning program in higher education), post-college (work and higher education). Studies were analyzed by research methods, disability type, what type of services were provided. Results of the study are as follow: research trends reflected the changes in regulations and laws by the government. Additionally, it was found that most of the research methods were survey and most of the subjects in research were college students with visual and sensory disabilities. The result showed that the contents areas of research were concentrated teaching and learning services and support for students with disabilities and focused success learning program in the college life. Based on the results of the study, a variety of research areas and practical support was suggested, and additionally an individualized learning service program for college students with disabilities were discussed and suggested future researches.

ATM 망에서 그룹 연결을 위한 우선순위 기반 공평성 향상 Leaky Bucket

손승현(Seung-Hyun Son),박은영(Eun-Young Park),이재훈(Jae-Hwoon Lee) 대한전자공학회 2002 대한전자공학회 학술대회 Vol.2002 No.11

ATM 망에서 그룹 연결을 위한 임계치를 가진 우선순위 기반 공평성 향상 Leaky Bucket 알고리즘

손승현(Seung-Hyun Son),이재훈(Jae-Hwoon Lee) 한국통신학회 2004 한국통신학회 학술대회 및 강연회 Vol.2004 No.4

비정형 콘크리트 패널 생산 시스템 구축 기초연구

손승현 ( Son Seung-hyun ),김기호 ( Kim Ki-ho ),김선국 ( Kim Sun-kuk ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.1

Glass fiber reinforced concrete (GFRC) is very suitable as a material for free-form concrete panels (FCPs) because of its lightweight, strong, moldable, durable and sustainable properties. GFRC is superior in construction and maintenance compared with materials such as steel, aluminium, titanium, glass and plastic, and is advantageous in cost. However, GFRC is being produced by skilled craftsmen, and still lacks the technology to economically produce high quality FCPs. Currently, there is a technology to automatically and accurately produce FCPs. However, the developed technology can not be applied to the field with simple production technology without production line for mass production. To solve this problem, the purpose of this study is a basic study of production system development of free-form concrete panels. This study introduces the developed FCPs production technology and builds FCP production system for mass production. The results of this study will be used as basic data for the commercial production of FCPs in the future.

PC의 현장생산-설치 통합관리를 위한 동적 시뮬레이션 모델 기초연구

손승현 ( Son Seung-hyun ),김기호 ( Kim Ki-ho ),김선국 ( Kim Sun-kuk ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2

In-situ production of PC (precast concrete) members can reduce costs by about 14.5% -21.6% compared to in-plant production due to the reduction of transportation costs, factory profits and overhead costs. However, in-situ production of PC members presents a variety of risks, including member production and yard area securing, and lead time for production within the installation period. To solve this, it is necessary be able to analyze and control and monitor the risk factors that influence in-situ production for PC member. The purpose of this study is to develop a dynamic simulation model for in-situ production and erection integrated management for PC members. For this study, risk factor identification, causal loop diagram, and dynamic simulation model construction were performed sequentially. The results of this study will be used as a basis for developing a risk management model for PC in-situ production.

초등수학 사실적, 개념적, 절차적 지식 교수를 위한 증거기반 중재의 실제

손승현 ( Seung Hyun Son ),서유진 ( You Jin Seo ),이주영 ( Joo Young Lee ),문주영 ( Ju Yeong Moon ) 한국초등교육학회 2011 초등교육연구 Vol.24 No.3

본 연구는 초등학교 학생들을 대상으로 한 국내 수학중재 연구 총 64편을 분석하여, 수학의 내용영역에 따라 수학의 사실적, 개념적, 절차적 지식을 향상시키는데 효과적인 증거기반 중재가 무엇인지를 밝히고, 각 중재의 세부적인 특징과 절차, 중재적용 수학영역은 무엇인가를 분석하였다. 분석결과, 첫째, 사실적 지식의 향상을 위한 효과적인 중재는 수와 연산영역에서 또래교수, 놀이활동, 직접교수법 등으로 나타났다. 둘째, 개념적 지식의 향상을 위한 효과적인 중재는 수학의 전 영역에서 현실맥락 교수, 구체물·표상기반 교수, 수학적 의사소통을 위한 교수로 나타났다. 마지막으로 절차적 지식 향상을 위한 효과적인 중재는 수학의 전 영역에서 인지·메타인지 전략, 수학문제 만들기, 도식기반 표상전략 교수인 것으로 나타났다. 각 지식의 영역별 효과적 중재의 특징과 절차, 중재제공시 유의점 등이 기술되었다. 또한 분석결과에 따른 학생들의 수학의 지식영역별, 내용영역별 균형 있는 수학능력 향상을 위한 향후 연구방향과 제안점이 논의되었다. This study reviewed research in elementary mathematics intervention and identified the evidence-based practices to build factual, conceptual, and procedural mathematical knowledge. Also, this study analyzed the instructional procedures and target mathematics content area of the intervention. The results of this study suggested that there were peer tutoring, activity-based mathematics, and direct instruction as effective interventions to build factual mathematical knowledge in the area of number and operation. Second, there were realistic context mathematics, concrete-representation-abstract, and mathematical communication to build conceptual knowledge across the all mathematics area. Finally, there were cognitive/metacognitive strategy instruction, problem posing activity, and schema-based representation strategy to build procedural knowledge across the all mathematics area. Instructional guidelines and procedures of the intervention across three knowledge areas and mathematics area were presented based on the analysis of the 64 articles. The importance of balancing these three knowledge areas across mathematics content areas to improve the instructional practices are discussed.

비정형 콘크리트 패널의 생산관리 기초연구

손승현 ( Son Seung-hyun ),임지영 ( Lim Jee-young ),나영주 ( Na Young-ju ),김선국 ( Kim Sun-kuk ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1

Currently, free-form building has been increased worldwide. However, as a finishing material of free-form building, the production of free-form concrete panels(FCPs) spends lots of cost and efforts since it is difficult to reuse the FCP formwork and lots of workers are needed to make free-form curve. In addition, the technology to produce the FCP economically and easily is insufficient. Therefore, the objective of this study is a basic study regarding production management for developing free-form concrete panels. To achieve the objective, the property of FCP and condition for effective production management and production process are analyzed. The results of this study can utilize to develop the algorithm for FCP production management.