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방임 및 보호 아동·청소년 원가정 회복지원 시범사업의 현황과 과제
정지영,안진경,김은혜,Jeong, Jeeyoung,Anh, Jinkyung,Kim, Eunhye 한국가족자원경영학회 2021 가족자원경영과 정책 Vol.25 No.3
Child abuse and neglect are recently increasing in Korea, and although the government has actively improved the child protection system, the number of abused children and the rate of cases judged as abuse have continuously risen. Given that 75% of child abusers are parents, child abuse and neglect are expected to recur. To prevent such a recurrence, various intervention programs for abused children and their parents are required. The purpose of this study were to design a recovery support service process and investigate the effectiveness of pilot program for families of origin, including neglected(protected) children, to improve the system by which these programs are operated, and formulate policy alternatives that reinforce "family preservation" principles. The pilot program was implemented from June to November 2020 in 4-local healthy family support center. The number of program participants and the frequency of participation in each other differed, because of the difference in number of confirmed coronavirus cases in each region and the requirement for social distancing. Through the program, a community-based service process was developed for neglected(protected) children and their parents, and cooperative networks between related facilities and institutions were established. The study formulated the following recommendations: First, a cooperation system among government departments mandated to provide different services to neglected(protected) children is needed. Second, wider and various channels through which abused children can avail of protective services should be developed within communities. Third, more stable environments for program operation should be cultivated, and cooperative partnerships should be sought for knowledge sharing among relevant government departments. Another necessary measure is for a center to develop its own business model, in which the duplication of services provided by involved organizations is avoided. Finally, clear guidelines, administrative standards, and specific plans for program operation should be arranged. Also regional characteristics are maintained, but services should be standardized.
절삭 깊이의 무작위 제어를 적용한 다이아몬드 선삭공정에서 소재회전 반경에 따른 미세패턴의 크기변화 분석 연구
정지영,한준세,최두선,제태진,Jeong, Ji-Young,Han, Jun-Se,Choi, Doo-Sun,Je, Tae-Jin 한국금형공학회 2020 한국금형공학회지 Vol.14 No.1
Ultra-high brightness and thin displays need to optical micro-patterns which can uniformly diffuse the lights and low loss. The micro random patterns have characteristics to rise the optical efficiency such as light extraction, uniform diffusion. For this reason, various fabrication processes are studied for random patterns. In this study, the micro random patterns were machined by diamond turning which used a controlled cutting tool path with random cutting depth. The machined patterns had random shape and directionality along the circumferential direction. The average width and length of machined random pattern according to rotation radius were 40.13㎛~55.51㎛ and 37.25㎛~59.49㎛, and these results were compared with the designed result. Also, the machining error according to rotation radius in diamond turning using randomly controlled cutting depth was discussed.
하지 내측 근력 트레이닝이 근 두께 및 질적 파라미터에 미치는 영향
정지영(Jiyoung Jeong),최대혁(Dai-hyuk Choi),김판권(Pankwon Kim),신충수(Choongsoo S. Shin) 대한기계학회 2020 大韓機械學會論文集B Vol.44 No.9
본 연구의 목적은 내측광근과 햄스트링근 내측부를 선택적으로 강화시키기 위한 내측 하지 근력 트레이닝이 근 형태 및 질적 파라미터에 미치는 효과를 규명하는 것이다. 성인 남녀 각 10명은 8주 동안 내측광근과 햄스트링근 내측부 강화 운동을 수행하였다. 트레이닝 전후 내측광근/외측광근과 햄스트링근 내측부/외측부의 초음파 영상을 측정하고 신뢰도를 평가한 결과, 근 두께 및 질적 파라미터에 대해 측정일 및 측정자 간 급내 상관 계수에서 높은 신뢰도를 보였다. 트레이닝 후 근 두께와 에코 강도는 남녀 모두 외측광근과 햄스트링근 외측부에 차이가 없었으나, 내측광근과 햄스트링근 내측부의 근 두께는 통계적으로 유의하게 증가하고, 에코 강도는 감소하였다. 즉, 본 연구에서 수행한 하지 내측 근력 트레이닝 프로그램을 통해 외측 대비 내측 근육을 효과적으로 강화시킬 수 있음을 확인하였다. This study aimed to examine the effect of medial quadriceps- and hamstring-focused strength training on muscle morphology and quality. Ten males and ten females participated in an eight-week strength training program for their medial quadriceps and hamstrings. The ultrasound images of medial/lateral quadriceps and hamstrings were collected before and after this program. Both muscle thicknesses and echo intensity parameters of all measured muscles showed high reliability coefficients. The muscle thickness of medial quadriceps and hamstrings significantly increased post training for both males and females, whereas no difference was observed in the muscle thickness of lateral quadriceps and hamstrings. The echo intensity of medial thigh muscles decreased for both males and females; however, there was no significant difference in the echo intensity of the lateral thigh muscles. Therefore, medial quadriceps- and hamstring-focused strength training can strengthen the medial thigh muscles selectively, and hence can be considered in ACL injury prevention programs.
정지영(Jiyoung Jeong),신충수(Choongsoo Shin) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
The purpose of this study was to examine the relationship between thigh muscular parameters and the knee joint kinematics during gait. Sixteen males and fourteen females participated in this study. Both muscle thickness and echo intensity parameters of all individual quadriceps and hamstrings were collected using ultrasound system, and knee joint kinematics during gait at preferred speed were measured using motion capture system. Regression analyses were performed at a significance level of 0.05. Vastus medialis muscle thickness was correlated with knee flexion angle and valgus angle at initial contact. Peak knee flexion angle was correlated with hamstring to quadrecep muscle thickness ratio, biceps femoris echo intensity, and gait stride. Range of motion in frontal plane and transverse plane were correlated with vastus intermedius & vastus medialis echo intensity and semitendinosus & gait speed, respectively. In conclusion, individual thigh muscle structure plays an important role in knee kinematics during gait.