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장애학생 대상 긍정적 행동지원 실험연구 동향 및 내용 분석
조재규 ( Jo¸ Jae Gyu ) 한국정서행동장애학회 2021 정서ㆍ행동장애연구 Vol.37 No.4
본 연구의 목적은 2011년부터 2020년까지 장애학생을 대상으로 긍정적 행동지원 중재를 실시한 실험연구 논문 23편의 연구방법 및 내용을 분석하는 것이다. 연구결과를 살펴보면, 첫째, 연구 대상 소속은 특수학교, 일반학교(특수학급), 유치원(어린이집), 대상자 수는 21명 이상 ∼30명 이하가 가장 많았다. 둘째, 실험장소는 특수학교, 일반학교(특수학급), 유치원(어린이집), 집단구성은 비장애 학생 + 장애학생을 대상으로 한 연구, 실험설계는 통제집단 AB설계가 가장 많았다. 셋째, 연구윤리에서 보호자 동의를 받은 논문은 73.9%였으며, 사회적 타당도와 관찰자간 신뢰도를 제시한 논문이 각각 69.6%였으며, 중재충실도는 79.3%가 제시하였다. 넷째, 독립변인으로 긍정적 행동지원을 학급 및 개별 차원으로 지원한 논문, 중재절차로서 PBS팀을 구성한 논문이 95.6%였으며, 기능평가, 선행사건중재, 대체행동중재, 후속결과중재를 실시한 논문이 100.0%로 나타났다. 실험기간은 4개월 이상~6개월 미만, 실험회기는 10회기 이상~20회기 미만 실시한 연구가 가장 많았다. 다섯째, 종속변인은 문제행동 감소와 대체행동 향상, 측정방법은 부분간격기록법이 가장 많았다. 여섯째, 중재 효과는 87.0%가 있는 것으로 나타났으며, 유지를 측정한 논문은 4.4%으로 매우 낮게 나타났다. 이상의 연구결과를 바탕으로 긍정적 행동지원 실험연구 중재의 개선 방안을 논의 및 제언하였다. The Purpose of this study analyzes the research methods and contents of 23 experimental research papers that conducted positive behavior support interventions for students with disabilities from 2011 to 2020. Looking at the results of the study, first, special schools, general schools (special classes), and kindergartens (day care center) were the most common, and the number of subjects was 21 or more to 30 or less. Second, the experimental site was a special school, a general school (special class), a kindergarten (day care center) were the most common, and as for the group composition, studies on general students and disabled students were the most common, and the control group AB design was the most common. Third, 73.9% of the papers received parental consent in research ethics, 69.6% of the papers presented social validity and reliability between observers, respectively, and 79.3% of the intervention integrity. Fourth, papers that supported positive behavior support at the class and individual level as independent variables were the most, and 95.6% of papers formed the PBS team as an intervention procedure, and 100.0% of papers conducted functional assessment, prior case intervention, alternative behavior intervention, and consequences intervention. The duration of the experiment was more than 4 months and less than 6 months, and the experiment period was the most of the studies with more than 10 times and less than 20 times. Fifth, as for the dependent variable, the decrease in problem behavior and improvement in the alternative behavior were the most frequent, and the measurement method was the partial interval recording method the most. Sixth, the intervention effect was found to be 87.0%, and the papers measuring maintenance were very low at 4.4%. Based on the above research results, improvement methods for positive behavior support experimental research interventions were discussed and suggested.
Jaegyu Jang,Hyoungmin So,Kihoon Lee,Jun-Pyo Park IET 2017 IET radar, sonar & navigation Vol.11 No.4
<P>This study verifies the performance of the ionosphere-free L1 pseudorange for dual-frequency space-based augmentation systems (SBAS) users by both of theoretical analysis and experiments with actual GPS data. Although the dual-frequency pseudorange from ionosphere-free linear combinations is commonly used as a standard method, the ionosphere-free L1 range based on the weighted Hatch filter has advantages in terms of the amplification factor caused by a dual-frequency combination and filter weights optimised by the least-squares method. For the experimental analysis, RINEX data were collected from five National Geographic Information Institute reference stations on the Korean peninsula and used to generate an SBAS correction message following international SBAS specifications. The experimental results show that using the proposed method results in a 29% improvement in the range domain compared with the use of a traditional ionosphere-free linear combination filter. In the position domain, the proposed method shows a horizontal accuracy improvement of 16% after the application of post-processed SBAS orbit/clock corrections w.r.t. the traditional filter. Finally, this study also demonstrates that the accuracy of dual-frequency users can surpass than that of single-frequency SBAS users only if corrections are estimated with ionospheric delay-free measurements in the master station as well.</P>
Spatial Decorrelation of SBAS Satellite Error Corrections in the Korean Peninsular
Jaegyu Jang,Hyoungmin So,Kihoon Lee,Jun-Pyo Park 한국항공우주학회 2016 International Journal of Aeronautical and Space Sc Vol.17 No.1
The characteristics of the SBAS satellite orbit and clock corrections are highly affected by the narrow network size in the Korean peninsula, which is expected to have an important role in the future dual frequency SBAS. The correlation between satellite corrections can be analyzed in terms of the spatial decorrelation effect which should be analyzed to keep the service area as wide as possible. In this paper, the characteristics of satellite error corrections for the potential Korean dual frequency SBAS were analyzed, and an optimal filter design approach is proposed to maximize the service area.
Jang, Jaegyu,Kee, Changdon Cambridge University Press 2009 The Journal of navigation Vol.62 No.3
<P>This paper describes the verification of a real-time attitude determination algorithm during GPS attitude receiver hardware development. The GPS attitude receiver of 24 channels had been already developed in Surrey University. However 24 channels were not enough for practical usage. For this reason, a 48-channel attitude receiver with 12 channels for each antenna has been developed. To estimate attitude in real time, precise relative positions of the GPS antenna array have to be determined as rapidly as possible. However, the calculation load based on the conventional algorithm is too burdensome to perform using the RISC microprocessor. Therefore, in this paper, the cycle ambiguities of each base vector are resolved using SNUGLAD (Seoul Nat Univ GNSS Lab Attitude Determination), the design focus of which is to allow the receiver to estimate the 10 Hz onboard solutions. To keep precise solutions continuously, after ambiguity removal, cycle slip must be detected or isolated. Otherwise, the receiver would output erroneous solutions after a short signal blockage or fading of the GPS signal. To prevent this, we defined the cycle slip detection and repair scheme using a standard extended Kalman filter, which can detect and repair cycle slip within one cycle. As a result, this paper shows that time synchronized measurement with good quality and a reliable solution can be provided by the hardware developed with inexpensive chipsets and that this may be a possible cost efficient sensor for UAV or microsatellites.</P>