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Ergonomic Study of Manual Hammering Tasks for Short Times (단시간 수동망치작업의 인간공학적 연구)

  • Kwon, Young-Guk
    • Journal of the Korean Society of Safety
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    • v.18 no.4
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    • pp.143-147
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    • 2003
  • The present investigation examined hammering performance, physiological response, preceived exertion, and user preference with regard to hammering in vertical (wall) and horizontal (bench) orientations, and with regard to using two different hammers. Ten male subjects participated in the experiment. The results support previous findings that horizontally oriented hammering is faster than vertically oriented hammering. In addition, the results suggest that hammer differences can affect hammering performance and perceived exertion; although, the exact contributions of specific design characteristics could not be quantitatively determined. However, participants subjectively identified handle design, weight, and mass distribution as critical factors.

Multimedia Learning of Children : Relationships Between Cognitive Style and Rehearsal Strategy (아동의 멀티미디어 활용학습에서 인지양식과 회상전략의 관계)

  • Byun, Sook Young;Choi, Kyoung Sook
    • Korean Journal of Child Studies
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    • v.26 no.3
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    • pp.127-139
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    • 2005
  • The subjects of this study were 86 eight- and 76 ten-year-old children(total: 162). Experimental procedures and tools included pre- and post- learning tests and controls for intelligence (Draw-a-Man-Test) and for cognitive styles(Children's Embedded Figures Test). The content of the learning task was the lightning generation process. After various types of seven-minute color animation multimedia presentations about the generation of lightning were screened, post-hoc analysis showed that the rehearsal strategy was effective with field-dependent learners but not with field-independent learners.

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Glycemic Index of Insu 100® Herbal Preparation Containing Korean Red Ginseng, Carob, Mulberry, and Banaba

  • Son, Dong-Wook;Lee, Jong-Won;Lee, Pyeong-Jae;Bae, Ki-Hwan
    • Journal of Ginseng Research
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    • v.34 no.2
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    • pp.89-92
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    • 2010
  • In this study, we determined the glycemic index (GI) of an herbal preparation (Insu $100^{(R)}$; Korean red ginseng, carob, mulberry, and banaba). Ten subjects (men and women) took part in standard glycemic testing during a 4-week study period (with duplicate trials of each treatment). Informed consent was obtained from each subject. No adverse effects resulted from the administration of the herbal preparation. The GI of Insu $100^{(R)}$ was $19.5{\pm}5.1$, indicating that administration of this herbal cocktail may be beneficial to people with metabolic disorders and to those who wish to maintain their overall health. This study complied with the Declaration of Helsinki.

Qualitative Research on the Experiences of Children in Interethnic Immigrant Families (결혼이민자 가정 유아의 유아교육기관 생활 경험에 대한 질적 연구)

  • Park, Mi Kyung;Ohm, Jung Ae
    • Korean Journal of Child Studies
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    • v.28 no.2
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    • pp.115-136
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    • 2007
  • In South Korea, some interethnic families result from prearranged marriages where 1 spouse is an immigrant. In this study, traits of children in families of interethnic immigrant marriages were studied by individual interviews of ten kindergarten teachers responsible for them and 8 observations of their preschool classes. Subjects were 21(13 male, 8 female) 3- to 5-year-old children. Results showed the diverse traits of these children : they adapted to the environment by changing and getting along, but some of them exhibited problematic behavior such as delayed language development, confused identity, and aggression. The attitude of their peers included passive reaction, discord and receptivity regarding their difference. The attitude of the teachers was a sense of responsibility and worry.

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Motor Cortex in Hemiparetic Patientsto Deep Intracerebal Hematoma

  • 백현만;최보영;손병철;정성택;이형구;서태석
    • Proceedings of the KSMRM Conference
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    • 2003.10a
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    • pp.87-87
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    • 2003
  • Purpose: To determine the motor cortex dysfunction in hemiparetic patients due to deep intracerebral hematoma, authors peformed proton magnetic resonance spectroscopy (1H MRS) for the evaluation of biochemical changes in the cortex on affected hemisphere according to axonal injury at the level of internal capsule. Materials and methods: Ten control subjects and 14 patients with documentable hemiparesis of varying severity hemiparesis were included. All the hemiparesis was caused by deep intracerebral hematoma (putaminal and thalamic hemorrhage). In vivo 1H MRS study was performed on a 3T MRI/MRS system using STEAM sequence. As a single-voxel technique, Spectral parameters were: 20 ms TE, 2000 ms TR, 128 averages, 2500 Hz spectral width, and 2048 data points.

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A Study ef Biomechanical Response in Human Body during Whole-Body Vibration through Musculoskeletal Model Development (전신 진동운동기 사용시 인체에 대한 생체역학적 특성 분석을 위한 가상 골격계 모델의 개발 및 검증)

  • Choi, Hyun-Ho;Lim, Do-Hyung;Hwang, Seon-Hong;Kim, Young-Ho;Kim, Han-Sung
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.5
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    • pp.155-163
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    • 2008
  • This study investigated biomechanical response through the 3-dimensional virtual skeletal model developed and validated. Ten male subjects in standing posture were exposed to whole body vibrations and measured acceleration on anatomical of interest (head, $7^{th}$ cervical, $10^{th}$ thoracic, $4^{th}$ lumbar, knee joint and bottom of the vibrator). Three dimensional virtual skeletal model and vibration machine were created by using BRG LifeMOD and MSC.ADAMS. The results of forward dynamic analysis were compared with results of experiment. The results showed that the accuracy of developed model was $73.2{\pm}19.2%$ for all conditions.

Consonant Inventories of the Better Cochlear Implant Children in Korea (말지각 능력이 우수한 인공와우 착용 아동들의 조음 특성 : 정밀전사 분석 방법을 중심으로)

  • Chang, Son-A;Kim, Soo-Jin;Shin, Ji-Young
    • MALSORI
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    • no.62
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    • pp.33-49
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    • 2007
  • The purpose of this study is 1) to investigate the phoneme inventories and phonological processes of cochlear implant(CI) children and 2) to describe their utterances using narrow phonetic transcription method. All ten subjects had more than 2 year-experience with CI and showed more than 85 % open-set sentence perception abilities. Average consonant accuracy was 81.36 % and it was improved up to 87.41% when distortion errors were not counted. They showed similar phonological processing patterns to HA or normal hearing children in some way as well as different phonological processing patterns from HA or normal hearing children. The prominent distortion error pattern was weakening of consonants. Every subject had his/her idiosyncratic error pattern that demanded his/her own individualized therapy program.

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The Effect of Trampoline Training on Balance and Position Sense of Knee Joint in Elderly Women (트렘폴린훈련이 여성노인의 균형과 무릎관절 위치감각에 미치는 영향)

  • Song, Hyun-Seung;Kim, Jin-Young
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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    • v.18 no.1
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    • pp.11-17
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    • 2012
  • Background: This study was conducted to examine the effect of application of trampolin training elderly women by position sense of knee joint and balance. Methods: Ten subjects with elderly women were randomly assigned to trampolin training group (n=5) or control group (n=5). Experimental group received for 15 minutes three times during 4 weeks. Outcomes was made using One-Leg Stance Test, Time Up and Go Test and position sense of knee joint. Assessment was before training and one week, two week, three week after training. Results: Applied to the trampolin training group showed significant differences in all tests and for the interaction between time and group (p<.05). Conclusions: Those results indicate that trampolin training is effective in elderly women to promoting a position sense of knee joint and balance ability.

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Hybrid Model-Based Motion Recognition for Smartphone Users

  • Shin, Beomju;Kim, Chulki;Kim, Jae Hun;Lee, Seok;Kee, Changdon;Lee, Taikjin
    • ETRI Journal
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    • v.36 no.6
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    • pp.1016-1022
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    • 2014
  • This paper presents a hybrid model solution for user motion recognition. The use of a single classifier in motion recognition models does not guarantee a high recognition rate. To enhance the motion recognition rate, a hybrid model consisting of decision trees and artificial neural networks is proposed. We define six user motions commonly performed in an indoor environment. To demonstrate the performance of the proposed model, we conduct a real field test with ten subjects (five males and five females). Experimental results show that the proposed model provides a more accurate recognition rate compared to that of other single classifiers.

A Human Metabolic Study for Determination of Daily Requirement of Riboflavin (한국인의 리보플라빈 일일필요량 측정을 위한 인체대사연구)

  • 윤진숙
    • Journal of Nutrition and Health
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    • v.22 no.6
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    • pp.507-515
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    • 1989
  • Ten healthy wome 2-~25 years participated in a 5-week metabolic study to investigate the daily riboflavin requirement of Korean women. Three daily menu and meal patterns were used. Low riboflavin(LR) diet provided riboflavin at a level of 0.71mg / 1000Kcal based on food composition table. High riboflavin(HR) diet provided 1.14mg / 1000Kcal. The riboflavin status was assessed by erythrocyte glutathione reductase activity coefficient(EGRAC) and urinary exretion of riboflavin. Mean EGRAC of LR period and HR period were 1.17+0.08 and 1.01+0.03, repectively. There were discrepanices of riboflavin content of experimental diet between chemical analysis and calculation by Korean food composition table. Urinary riboflavin excretion of subjects was acceptable over the whole study period. It appeared that 0.71mg / 1000Kcal is requirement of riboflavin to maintain EGRAC withing normal range. Thus, it is suggested that current recommendation of 0.6mg / 1000Kcal of riboflavin intake may not be adequate as RDA level in Korea.

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