Structural cuticular proteins (CPs) and the liner polysaccharide, chitin, are the primary components of insect cuticle or exoskeleton. A large number of insect CP family proteins are divided into several distinct subfamilies defined by the presence of specific amino acid sequence motifs. One of these subfamilies is composed of Cuticular Protein Analogous to Peritrophins (CPAPs), containing one (CPAP1s) or three (CPAP3s) type-2 chitin-binding domains. In this study, we report a novel function of TcCPAP1-C from Tribolium castaneum in movement of legs. RNAi for TcCPAP1-C at larval stage has no effect on insect molting, growth and development. However, the resulting adults exhibit impaired leg movement, in which internal tendon cuticles are ruptured near the femur-tibia joint. The exoskeletal cuticle, hemiadherens junctions, microtubule array, myotendinous junctions and muscle fibers exhibit normal morphology before the tendon breakage. These results indicate functional specialization of TcCPAP1-C in structural integrity of the internal tendon cuticle, and loss of function of TcCPAP1-C caused breakage of the tendon cuticle, resulting in defective limb movement and locomotion.

The purpose of this study was to measure the nutrition knowledge, dietary attitude, eating behavior, physical ability and locomotion of 5-year-old-children, and thereby to provide the fundamental information necessary to develop a nutritionrelated physical education program. A survey was performed on 143 5-years-old boys and 113 girls. The results were as follows. The average score in the nutrition knowledge item, was 7.22 out of a possible 10 points; in the dietary attitude item, 32.46 out of 50 points; in the eating behavior item, 26.67 out of 40 points. According to body measurement, there was a significant difference in height by gender (p＜0.05), Significant differences in muscle mass and basal metabolic rate were also observed by gender (p＜0.001). Gender also influenced the flexibility and reflexibility (p＜0.001), with significant difference in balance of the right side (p＜0.01). Although this study was limited by its cross-sectional study design, the body muscle (p＜0.05) and basal metabolic rate (p＜0.05) were observed to have a positive relation with nutritional knowledge. In addition, there was a significant positive correlation between nutritional knowledge and dietary attitude (p＜0.01). According to the results, it is necessary to develop a long-term and systematic program with the combination of nutrition and physical education to develop correct dietary habits and for the balanced growth of children.

Slipping during various kinds of movement often leads to potentially dangerous incidents of falling. The purpose of this paper was to review some of the research performed in the field including such topics as rating scales for balance, kinematics and kinetics of slipping, adaptation to slippery conditions, postural and balance control, and protective movement during falling. Controlling slipping and fall injuries requires a multifaceted approach. Environmental conditions (state of floor surface, tidiness, lighting, etc), work task (walking, carrying, pushing, lifting, etc), and human behavior (anticipation of hazards, adaptation to risks, risk taking, etc) must be accounted for in the assessment of slip and fall-related risks. Future directions of research must deal with modeling of basic tribophysical, biomechanical, and postural control process involved in slipping and falling.

부정형성게류인 구멍연잎성게는 제주도 연안에 널리 분포하고 있음에도 불구하고 생태학적 연구들이 미비한 실정이다. 이 연구는 구멍연잎성게의 행동학적 연구로서 먹이섭취, 서식밀도 및 이동에 대한 기초자료로서 시료는 제주도의 북동쪽에 위치한 함덕에서 SCUBA를 통하여 채집 및 현장에서 직접 관찰하였다. 장내용물 관찰 결과, 장내 퇴적물 입자의 평균 입도조성은 77.6±22.2μm였다. 장 내용물은 유공충, 저서성 요각류, 선충류, 규조류,

이 연구는 베트남 현지 한국어 초급 학습자를 위한 ‘가다’, ‘오다’의 오류 양상을 토대로 적절한 교육 방안을 모색하는 것에 연구 의 목적을 두었다. 이를 위하여 문헌 고찰을 통한 연구 현안 및 이론 적 배경을 확인하였고, 베트남어 ‘đi(가다)’, ‘đến(오다)’의 의미를 비교 하였다. 그다음 베트남 현지 초급 학습자의 쓰기 자료 46편(1,413어절) 을 분석하여 베트남인 현지 한국어 초급 학습자의 ‘가다’, ‘오다’의 의 미적 오류 양상을 확인하는 양적 연구를 진행하였다. 이로써 국내 베 트남인 학습자가 범한 오류와 비교하고, 앞서 확인한 내용을 토대로 현지 학습자를 위한 적절한 교육의 방향성을 제언하였다.

This paper presents mechanical design and control of a bio-inspired legged robot. To achieve a fast legged running mechanism, a novel linkage leg structure is designed based on hind legs of domestic cats. The skeletomuscular system and parallel leg movement of a cat are analyzed and applied to determine the link parameters. The hierarchical control architecture is designed according to the biological data to generate and modulate desired gaits. The effectiveness of the leg mechanism design and control is verified experimentally. The legged robot runs at a speed of 46 km/h, which is comparatively higher speed than other existing legged robots.

Purpose: Postural stability has an important role for developing locomotion skills, especially in childhood. The purpose of this study was to investigate the developmental change of postural stability with respect to locomotor skills. Methods: Thirty-five participants aged between five to seven year-old whom differentiated by pre examination were divided into Jumping, Hopping, Galloping and Skipping group, respectively. They were asked to perform quiet standing and leaning voluntarily forward, backward, left and right as far as possible on a force plate. A vector of center of pressure was measured to calculate postural stability and one-way ANOVA was performed. Results: Jumping group showed significant low postural stability than the others and there is no significant difference among Hopping, Galloping, and Skipping group who can perform advanced locomotor skills. Conclusion: Postural stability seems to increase when children acquire advance locomotor skills and this result might reflect nonlinear characteristic of human motor development.

본 연구는 중추신경계의 일부분으로서 신체의 자세 및 자발적 움직임의 조절과 평형을 유지하는 기능을 담당하는 소뇌에 이상이 있는 환자를 대상으로 댄스-기반 운동치료 프로그램이 환자의 균형과 보행능력의 재학습에 어떠한 영향을 주는지 조사하였다. 연구의 참가한 소뇌질환 환자는 유전적 원인으로 인해소뇌의 신경세포가 사멸하여 그 크기가 감소하는 소뇌위축증(cerebellar atrophy)으로 진단을 받고 그로인한 운동장애인 운동실조증(ataxia)을 보인 1명의 환자를 대상으로 하였다. 연구 대상자는 파트너 댄스인 탱고 스텝에 기반을 둔 운동치료 프로그램에 8주에 걸쳐 매주 3회씩 한번에 90분씩 진행하는 수업에 참가하였다(총 24회). 연구 결과, 댄스에 기반을 둔 운동 치료 프로그램에 참여한 소뇌성 운동실조증 환자의 평지 보행 능력 측정에서의 보폭 길이가 증가하였으며 보간 너비가 감소한 것으로 나타났다. 또한 보행 주기 중 한 다리 지지기 비율과 균형 능력의 향상과 같은 긍정적 상호작용도 나타났다. 보다 기능적인 보행 능력을 평가하는 장애물 넘기 보행에서는 장애물을 넘기 직전의 움직임 동결 시간이 감소하였으며, 장애물을 넘기 전 선행하는 발의 이륙거리와 장애물 통과 속도는 초기에 비해 사후 검사에서 증가하는 양상을 나타냈다. 이러한 결과는 댄스-기반 운동치료 프로그램 훈련이 소뇌성 운동실조증 환자에게 적용되었을 때 정상적인 보행주기 패턴의 재정립과 균형 능력의 회복에 긍정적인 영향을 줄 수있음을 보여준다.

In these days, researches about underwater robots have been actively in progress for the purposes of ocean detection and resource exploration. Unlike general underwater robots such as ROV(Remotely Operated Vehicle) and AUV(Autonomous Underwater Vehicle) which have propellers, an articulated underwater robot which is called Crabster has been being developed in KORDI(Korea Ocean Research & Development Institute) with many cooperation organizations since 2010. The robot is expected to be able to walk and swim under the sea with its legs. Among many researching fields of this project, we are focusing on a swimming section. In order to find effective swimming locomotion for the robot, we approached this subject in terms of Biomimetics. As a model of optimized swimming organism in nature, diving beetles were chosen. In the paper, swimming motions of diving beetles were analyzed in viewpoint of robotics for applying them into the swimming motion of the robot. After modeling the kinematics of diving beetle through robotics engineering technique, we obtained swimming patterns of the one of living diving beetles, and then compared them with calculated optimal swimming patterns of a robot leg. As the first trial to compare the locomotion data of legs of the diving beetle with a robot leg, we have sorted two representative swimming patterns such as forwarding and turning. Experimental environment has been set up to get the motion data of diving beetles. The experimental equipment consists of a transparent aquarium and a high speed camera. Various swimming motions of diving beetles were recorded with the camera. After classifying swimming patterns of the diving beetle, we can get angular data of each joint on hind legs by image processing software, Image J. The data were applied to an optimized algorithm for swimming of a robot leg which was designed by robotics engineering technique. Through this procedure, simulated results which show trajectories of a robot leg were compared with trajectories of a leg of a diving beetle in desired directions. As a result, we confirmed considerable similarity in the result of trajectory and joint angles comparison.

In this study, we aim to develop energy efficient walking and running robot with compliant leg. So, we propose the energy efficient locomotion control method. And, we experiment the proposed control method applying to the experimental robot with compliant leg. From the experiment, we look at whether the proposed control method can the robot walk and run energy efficiently.

This paper presents a motion planning strategy for legged robots using locomotion primitives in the complex 3D environments. First, we define configuration, motion primitives and locomotion primitives for legged robots. A hierarchical motion planning method based on a combination of 2.5 dimensional maps such as an obstacle height map, a passage map, and a gradient map of obstacles to distinguish obstacles. A high-level path planner finds a global path from a 2D navigation map. A mid-level planner creates sub-goals that help the legged robot efficiently cope with various obstacles using only a small set of locomotion primitives that are useful for stable navigation of the robot. A local obstacle map that describes the edge or border of the obstacles is used to find the sub-goals along the global path. A low-level planner searches for a feasible sequence of locomotion primitives between sub-goals. We use heuristic algorithm in local motion planner. The proposed planning method is verified by both locomotion and soccer experiments on a small biped robot in a cluttered environment. Experiment results show an improvement in motion stability.