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( Ji Young Lim ),( Jisoo Choi ),( Yoon Jin Kim ),( Jeongin Eur ),( Kyu Yon Lim ) 한국교육공학회 2019 Educational Technology International Vol.20 No.2
The purpose of this study is to draw implications for designing online tools to support monitoring in collaborative learning. For this purpose, eighteen research papers that explored learner dashboards and group awareness tools were analyzed. The driving questions for this analysis related to the information and outcomes that must be monitored, whose performance they represent, and who monitors the extent of learning. The analytical frameworks used for this study included the following: three modes of co-regulation in terms of who regulates whose learning (self-regulation in collaborative learning, other regulation, and socially shared regulation) and four categories of dashboard information to determine which information is monitored (information about preparation, participation, interaction, and achievements). As a result, five design implications for learner dashboards that support monitoring were posited: a) Monitoring tools for collaborative learning should support multiple targets: the individual learner, peers, and the entire group; b) When supporting personal monitoring, information about the individual and peers should be displayed simultaneously to allow direct comparison; c) Information on collaborative learning achievements should be provided in terms of the content of knowledge acquired rather than test scores; d) In addition to information related to interaction between learners, the interaction between learners and learning materials can also be provided; and e) Presentation of the same information to individuals or groups should be variable.
4WD 차량의 구동 및 핸들링 성능 향상을 위한 토크 배분 제어 방법
이지수(Jisoo Lee),하성기(Seongki Ha),박재일(Jaeil Park),임성근(Sungkeun Lim),김두현(Doohyun Kim),강헌(Heon Kang) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
A four Wheel Drive(4WD) system was developed to improve primary trdction performance(off-road drive, hill climb etc). It has made to improve fuel economy, endurance and handling performance since electronic 4WD system was developed. Recently, the research is progressing about distributing optimal torque of each wheel. This paper proposes control method to improve traction and handling performance between wheel torque distributions for 4WD system. This control system consists of slip control, handling control, preload control and NVH control. This control logic was confirmed by dynamic simulation using CarSim and MATLAB/Simulink. Finally, we evaluated this control algorithm by testing vehicle. We accomplished to improve tractirn and handling performance through optimal torque distribution control.
Decrease of Muscle Mass in Young Patients With Neuromuscular Disease: Assessment of Sarcopenia
Kim Jisoo,Yoon Haesung,Lim Hyun Ji,Kim Hyun Woo,Suk Yong June,Park Kun-Bo,Lee Mi-Jung 대한의학회 2023 Journal of Korean medical science Vol.38 No.21
Background: Sarcopenia can be associated with the disease etiologies other than degenerative processes, such as neurologic disease including cerebral palsy, myelomeningocele, or Duchenne muscular dystrophy, even in children. Although the relationship between neurologic disease and scoliosis or ambulatory function is known, the mediators affecting scoliosis or gait function in these patients are unclear, an example might be sarcopenia. This study aimed to assess the degree of sarcopenia in young patients with neurologic diseases using computed tomography (CT), and analyze the correlation between sarcopenia and scoliosis or ambulatory function. Methods: Pediatric and young adult patients (≤ 25 years old) who underwent whole-spine or lower-extremity CT were retrospectively included. From bilateral psoas muscle areas (PMAs) at the L3 level, the psoas muscle z-score (PMz) and psoas muscle index [PMI = PMA/(L3 height)2 ] were calculated. The t-test, Fisher’s exact test, and logistic regression analyses were performed. Results: A total of 121 patients (56 men, mean age 12.2 ± 3.7 years) were included with 79 neurologic and 42 non-neurologic diseases. Patients with neurologic diseases had lower PMz (P = 0.013) and PMI (P = 0.026) than patients without. In neurologic disease patients, severe scoliosis patients showed lower PMz (P < 0.001) and PMI (P = 0.001). Non-ambulatory patients (n = 42) showed lower BMI (β = 0.727, P < 0.001) and PMz (β = 0.547, P = 0.025). In non-ambulatory patients, patients with severe scoliosis also showed lower PMz (P < 0.001) and PMI (P = 0.004). Conclusion: Patients with neurologic diseases could have sarcopenia even in young age. Psoas muscle volume was also associated with ambulatory function in these patients. Sarcopenia was more severe in severe scoliosis patients in the non-ambulatory subgroup.