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최재홍,오재섭,김문환 KEMA학회 2019 근골격계과학기술학회 Vol.3 No.1
ABSTRACT Background Pelvic compression belt passively stabilized the sacroiliac joint via application of a compression force, thereby having a possibility to affect hip muscle strength. Purpose We investigated the effects of pelvic compression belts on the strength of hip extensor and the electromyographic (EMG) activities of latissimus dorsi and erector spinae during isometric prone hip extension with knee extension and prone hip extension with knee flexion. Study design Comparative, repeated measures design. Methods We recruited 15 patients with sacroiliac joint pain. All performed isometric prone hip extension with knee extension with and without a pelvic compression belts at a hip extension of 10°. Strength of hip extensor were measured using a load cell, and the muscle activities of the contralateral latissimus dorsi and erector spinae muscles measured using surface EMG. Results Strength of hip extensor with a pelvic compression belts increased significantly compared to without a pelvic compression belts (p<0.001) as did the EMG activity of the contralateral latissimus dorsi (p<0.05). However, the EMG activity of the contralateral erector spinae did not change significantly (p>0.05). Conclusions We recommend using of a pelvic compression belts by sacroiliac joint pain patients increased the strength of hip extensor and muscle activity of contralateral latissimus dorsi. ABSTRACT Background Pelvic compression belt passively stabilized the sacroiliac joint via application of a compression force, thereby having a possibility to affect hip muscle strength. Purpose We investigated the effects of pelvic compression belts on the strength of hip extensor and the electromyographic (EMG) activities of latissimus dorsi and erector spinae during isometric prone hip extension with knee extension and prone hip extension with knee flexion. Study design Comparative, repeated measures design. Methods We recruited 15 patients with sacroiliac joint pain. All performed isometric prone hip extension with knee extension with and without a pelvic compression belts at a hip extension of 10°. Strength of hip extensor were measured using a load cell, and the muscle activities of the contralateral latissimus dorsi and erector spinae muscles measured using surface EMG. Results Strength of hip extensor with a pelvic compression belts increased significantly compared to without a pelvic compression belts (p<0.001) as did the EMG activity of the contralateral latissimus dorsi (p<0.05). However, the EMG activity of the contralateral erector spinae did not change significantly (p>0.05). Conclusions We recommend using of a pelvic compression belts by sacroiliac joint pain patients increased the strength of hip extensor and muscle activity of contralateral latissimus dorsi.
호텔 레스토랑 종사원이 지각하는 심리적 계약이행이 신뢰와 조직 동일시에 미치는 영향
최재홍,김재현 한국외식경영학회 2013 외식경영연구 Vol.16 No.3
This study examined the effect of psychological contract fulfillment on trustand organizational identification. It also analyzed the relationship betweentrust and organizational identification. An empirical study conduct with 281employee at 7 hotel restaurants found that psychological contract fulfillmenthad a significant positive relationship with trust respectively. relationalobligation had significant positive relation with trust of superior andorganization, Also transactional obligations had significant positive relationwith trust of superior and organization. Organizational trust had a significantpositive relationship with organizational identification, whereas superior trusthad insignificant relation with organizational identification. relational obligationhad significant positive relation with organizational identification, but transactionalobligations had insignificant relation with organizational identification. Findingsuggestion that psychological contract fulfillment seems to be the key factorthat has a strong effect on trust, Implications for practitioners and futureensue, which underscores the importance of build trust and employee’s perceivedorganizational identification in hotel firms. 본 연구는 심리적 계약 이행이 신뢰와 조직 동일시에 미치는 영향에 관하여 분석하였다. 또한 신뢰와 조직 동일시 간의 관계도 분석하였다. 경험적인 연구를 수행하기 위하여 7개소 호텔의 281명의 레스토랑 종사원들을 대상으로 실시하였으며 연구결과 심리적 계약이행과 신뢰 간에는 정적인 영향관계가 있는 것으로 나타났다. 관계적 의무감 이행은 조직신뢰와 상사신뢰에 긍정적인 영향을 미치는 것으로 나타났으며 거래적 의무감 이행은 조직신뢰와 상사신뢰에 긍정적인 영향을 미치는 것으로 나타났다. 조직신뢰는 조직 동일시에 긍정적인 영향을 미치는 것으로나타났으나, 상사신뢰는 조직 동일시에 비유의적인 것으로 나타났다. 또한 관계적의무감 이행은 조직 동일시에 긍정적인 영향을 미치는 것으로 나타났으나, 거래적의무감은 조직 동일시에 비유의적인 것으로 나타났다. 호텔 레스토랑 조직에 대한동일시를 함양하는데 있어 신뢰와 심리적 계약이행은 중요한 변수로 간주되며 마지막으로 실무적인 시사점과 향후 연구에 대한 방향을 제시하였다.
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최재홍,김명수,김윤지,이언화 대한치과교정학회 2019 대한치과교정학회 임상저널 Vol.9 No.1
It is often to deal with patients who lost permanent molars or had hopeless permanent molars requiring orthodontic treatment. Orthodontic space closure by protracting posterior teeth can be an excellent treatment option without dental implants. We report the cases of orthodontic spaces closures of extraction sites by protraction of maxillary molars in various ages. The orthodontic closures of extraction spaces by maxillary molars protractions were done with skeletal anchorage devices and selected force systems. Careful evaluations of anatomic conditions and using of proper biomechanics should be considered for successful results.