대학야구선수의 Y Balance Test와 하지 가동성의 관계

최원호(Choi, Won-Ho),김병곤(Kim, Byung-Gon),임승길(Lim, Seung-Kil) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.5

The purpose of this study is to present the Y Balance Test (YBT) profile of college baseball players and determine the relationship between YBT and ankle and hip mobility. The subjects of this study were 27 college baseball players. The dynamic balance ability of the lower extremities was measured using the YBT Kit. Ankle mobility was measured using the modified weight bearing lunge test(WBLT) and the non-weight bearing dorsiflexion(NWBD) range of motion(ROM) test. Hip mobility was measured for flexion and extension ROM. ROM was measured with passive ROM using a goniometer. The dynamic balance and mobility of the left and right lower extremities were compared using the paired-T test. The relationship between dynamic balance and mobility of the lower extremities was analyzed using Pearson’s correlation. The YBT results of college baseball players showed no significant difference between left and right(p>.05). The lower extremity mobility of college baseball players was significant only in the NWBD ROM of the ankle(p=.012), and other variables were not significantly different(p>.05). YBT right anterior reach had a significant correlation with WBLT right(r=.628, p=.000) and WBLT left(r=.507, p=.007). YBT left anterior reach had a significant correlation with WBLT right(r=.807, p=.000) and WBLT left(r=.691, p=.000). In addition, the YBT left posteromedial reach had a significant correlation with the right hip extension ROM(r=.394, p=.046). However, there was no significant correlation with other variables(p>.05). Overall, the decrease in ankle mobility of college baseball players is related to the decrease in dynamic balance ability. In particular, the decrease in dorsiflexion mobility of the ankle in the weight-bearing lower extremity is related to the limitation of the anterior reach motion of the non-weight-bearing lower extremity. Therefore, it is recommended that college baseball players regularly evaluate their ankle mobility to improve dynamic balance ability and prevent injuries.

Dynamic Myofascial Release on Postural balance in Patients With Chronic Low Back Pain

( Dong-woo Lee ),( Hwa-kyung Shin ) 한국감성과학회 2019 한국감성과학회 국제학술대회(ICES) Vol.2019 No.-

Purpose: Dynamic Myofascial Release(DMFR) was conducted as it was expected to be effective improving body movements and Chronic Low Back Pain when the MFR and joint mobility were mobilized in a direct or indirect manner to approach the problematic area. Methods: 30 patients with non-specific low back pain were selected and randomly divided into DMFR group (N = 15) and control group (N = 15). The control group was received treatment with limited of trunk's ROM and DMFR group was received DMFR. Dynamic Myofascial Release is a separate therapeutic area from joint mobilization. Because Dynamic Myofascial Release is a therapeutic method for myofascial that is the connective tissue that connects the whole human body. And because the patient and the therapist are involved in the treatment at the same time, and the patient's active posture or participation includes low intensity movements that can be released only by breathing. The other is that the therapeutic action that causes movement around the fixed axis is extremely restrained as if it reminds of slow video and static energy therapy Results: The results showed that the mobility and standing balance of the trunk increased significantly compared to the control group (Lee Dong-woo et al, 2019). Dynamic Myofascial Release is expected to help improve trunk movement and non-specific low back pain, and should be used properly with Myofascial Release (P<.05) Conclusions: Dynamic Myofascial Release(DMFR) was effective. These of direct or indirect methods to access problematic areas, including MFR and joint mobility, was effective in improving body movements and lumbar pain.

스마트 모바일 환경에서 의료정보 동적접근 시스템

정창원 ( Chang Won Jeong ),김우홍 ( Woo Hong Kim ),윤권하 ( Kwon Ha Yoon ),주수종 ( Su Chong Joo ) 한국인터넷정보학회 2015 인터넷정보학회논문지 Vol.16 No.1

최근, 병원정보시스템의 환경은 다양한 스마트 기술을 접목하고 있는 추세이다. 따라서, 스마트 폰, 테블렛 PC와 같은 다양한 스마트 디바이스가 의료 정보 시스템에 활용된다. 또한, 이러한 환경은 이기종 센서, 디바이스, 시스템 및 네트워크에서 실행되는 다양한 응용 프로그램으로 구성된다. 이들 병원 정보 시스템 환경에서, 기존의 접근 제어 방식에 의한 보안 서비스를 적용하는 것은 문제가 된다. 기존 보안 방식의 대부분은 접근제어 리스트 구조를 사용한다. 이는 클라이언트 이름, 서비스 객체 메소드 이름으로 접근 제어 매트릭스에 의해 정의된 접근만을 허용한다. 가장 큰 문제점으로는 정적인 접근 방법은 변화되는 상황에 신속하게 적응하지 못한다. 따라서, 우리는 보다 유연하고, 매우 상이한 보안 요구와 다양한 환경에 적용 할 수 있는 새로운 보안 메커니즘을 필요로 한다. 또한, 환자중심의 의료 서비스 형태로 변화되고 있어, 이를 해결하기 위한 연구가 요구된다. 본 논문에서는 스마트 모바일 환경에서 의료정보 동적접근 시스템을 제안하고자 한다. 우리는 기존 병원정보 시스템의 환경을 기반으로 동적접근 제어 방법으로 의료정보 시스템에 접근하는 방법에 중점을 두었다. 물리적인 환경은 모바일 x-ray 영상 디바이스와 전용 모바일 스마트 디바이스, PACS, EMR 서버와 인증 서버로 구성하였다. 소프트웨어 환경은 모바일 X-ray영상기기는 Windows7 OS를 기반으로 동기화 및 모니터링 서비스를 위해 .Net Framework를 기반으로 개발하였다. 그리고 전용 스마트 디바이스는 Android OS를 기반으로 JSP와 Java SDK를 통한 동적접근 응용 서비스를 구현하였다. 병원의 의료영상정보 서버와 모바일 X-ray영상기기, 전용 스마트 디바이스간의 의료정보는 의료영상정보 표준인 DICOM을 기준으로 한다. 또한 EMR 정보는 H7을 기반으로 한다. 동적접근 제어 서비스를 제공하기 위해, 우리는 산소포화도, 심박수, 혈압과 체온과 같은 생체 정보의 값에 대한 조건에 의해 환자의 상황을 분류하고, 의료진의 의료정보 접속 인증 방법으로 동적인 접근 방법을 설계했다. 이는 일반 상태와 응급상태로 2부분으로 구분하여 이벤트 추적 다이어그램으로 보였다. 그리고, 인증 정보는 ID/PWD와 위치, 역할, 작업시간 그리고 응급 환자를 위한 응급 코드를 포함하였다. 동적접근 제어 방법의 일반적인 상황은 인증 정보의 값에 의해 의료정보에 접근 할 수 있다. 그러나 응급상황의 경우는 인증 정보 없이 응급 코드에 의해 의료정보에 접근하도록 하였다. 또한, 우리는 의료정보 표준에 따라 환자, 의료진 및 의료 영상 정보로 구성되는 의료정보 통합 데이터베이스 스키마를 구축했다. 끝으로, 우리는 제안 시스템의 수행 결과를 일반과 응급상황과 같은 환자의 상태에 따라 스마트 디바이스 기반으로 동적접근 응용 서비스의 유용성을 보였다. 특히, 제안 된 시스템은 동적 액세스 제어 방법에 의해 응급상황에서 스마트 디바이스기반의 효과적인 의료 정보 서비스를 제공한다. 이 결과, 제안한 시스템이 u-병원 정보 시스템과 서비스에 유용할 것으로 기대한다. Recently, the environment of a hospital information system is a trend to combine various SMART technologies. Accordingly, various smart devices, such as a smart phone, Tablet PC is utilized in the medical information system. Also, these environments consist of various applications executing on heterogeneous sensors, devices, systems and networks. In these hospital information system environment, applying a security service by traditional access control method cause a problems. Most of the existing security system uses the access control list structure. It is only permitted access defined by an access control matrix such as client name, service object method name. The major problem with the static approach cannot quickly adapt to changed situations. Hence, we needs to new security mechanisms which provides more flexible and can be easily adapted to various environments with very different security requirements. In addition, for addressing the changing of service medical treatment of the patient, the researching is needed. In this paper, we suggest a dynamic approach to medical information systems in smart mobile environments. We focus on how to access medical information systems according to dynamic access control methods based on the existence of the hospital`s information system environments. The physical environments consist of a mobile x-ray imaging devices, dedicated mobile/general smart devices, PACS, EMR server and authorization server. The software environment was developed based on the .Net Framework for synchronization and monitoring services based on mobile X-ray imaging equipment Windows7 OS. And dedicated a smart device application, we implemented a dynamic access services through JSP and Java SDK is based on the Android OS. PACS and mobile X-ray image devices in hospital, medical information between the dedicated smart devices are based on the DICOM medical image standard information. In addition, EMR information is based on H7. In order to providing dynamic access control service, we classify the context of the patients according to conditions of bio-information such as oxygen saturation, heart rate, BP and body temperature etc. It shows event trace diagrams which divided into two parts like general situation, emergency situation. And, we designed the dynamic approach of the medical care information by authentication method. The authentication Information are contained ID/PWD, the roles, position and working hours, emergency certification codes for emergency patients. General situations of dynamic access control method may have access to medical information by the value of the authentication information. In the case of an emergency, was to have access to medical information by an emergency code, without the authentication information. And, we constructed the medical information integration database scheme that is consist medical information, patient, medical staff and medical image information according to medical information standards.y Finally, we show the usefulness of the dynamic access application service based on the smart devices for execution results of the proposed system according to patient contexts such as general and emergency situation. Especially, the proposed systems are providing effective medical information services with smart devices in emergency situation by dynamic access control methods. As results, we expect the proposed systems to be useful for u-hospital information systems and services.

Muscle activity in relation to the changes in peripheral nerve conduction velocity in stroke patients: Focus on the dynamic neural mobilization technique

국제물리치료연구학회 국제물리치료연구학회 2018 Journal of International Academy of Physical Ther Vol.9 No.2

The objective of this study was to investigate the dynamic neural mobilization program on the changes in muscle activity and nerve conduction velocity (NVC) in stroke patients. The participants were sampled and randomly divided into experimental group I (n=12) who underwent arm neural mobilization and experimental group II (n=13) who underwent arm dynamic neural mobilization. As the pretest, peripheral NVC of the radial, median, and ulnar nerves were measured using the Viking Quest; the biceps brachii, brachioradialis, flexor carpi radialis, and extensor carpi radialis activities were measured with sEMG. Each intervention program consisted of 10 trials per set and three sets per session. The intervention programs were performed once daily for four weeks (four days/week). Posttest measurements were taken equally as the pretest measurements. Significant differences in peripheral NVC in all sections of the radial and median nerves and wristbelow elbow and below elbow-above elbow areas of the ulnar nerve, as well as in muscle activity of all muscles except the biceps brachii. These findings indicate that dynamic neural mobilization was effective in increasing peripheral NVC and altering the muscle activity.

Muscle activity in relation to the changes in peripheral nerve conduction velocity in stroke patients: Focus on the dynamic neural mobilization technique

강정일,문영준,정대근,최현,박준수,최현호 국제물리치료연구학회 2018 Journal of International Academy of Physical Ther Vol.9 No.2

The objective of this study was to investigate the dynamic neural mobilization program on the changes in muscle activity and nerve conduction velocity (NVC) in stroke patients. The participants were sampled and randomly divided into experimental group I (n=12) who underwent arm neural mobilization and experimental group II (n=13) who underwent arm dynamic neural mobilization. As the pretest, peripheral NVC of the radial, median, and ulnar nerves were measured using the Viking Quest; the biceps brachii, brachioradialis, flexor carpi radialis, and extensor carpi radialis activities were measured with sEMG. Each intervention program consisted of 10 trials per set and three sets per session. The intervention programs were performed once daily for four weeks (four days/week). Posttest measurements were taken equally as the pretest measurements. Significant differences in peripheral NVC in all sections of the radial and median nerves and wristbelow elbow and below elbow-above elbow areas of the ulnar nerve, as well as in muscle activity of all muscles except the biceps brachii. These findings indicate that dynamic neural mobilization was effective in increasing peripheral NVC and altering the muscle activity.

Muscle activity in relation to the changes in peripheral nerve conduction velocity in stroke patients: Focus on the dynamic neural mobilization technique

Kang, Jeong IL,Moon, Young Jun,Jeong, Dae Keun,Choi, Hyun,Park, Joon Su,Choi, Hyun Ho International Academy of Physical Therapy Research 2018 Journal of International Academy of Physical Ther Vol.9 No.2

The objective of this study was to investigate the dynamic neural mobilization program on the changes in muscle activity and nerve conduction velocity (NVC) in stroke patients. The participants were sampled and randomly divided into experimental group I (n=12) who underwent arm neural mobilization and experimental group II (n=13) who underwent arm dynamic neural mobilization. As the pretest, peripheral NVC of the radial, median, and ulnar nerves were measured using the Viking Quest; the biceps brachii, brachioradialis, flexor carpi radialis, and extensor carpi radialis activities were measured with sEMG. Each intervention program consisted of 10 trials per set and three sets per session. The intervention programs were performed once daily for four weeks (four days/week). Posttest measurements were taken equally as the pretest measurements. Significant differences in peripheral NVC in all sections of the radial and median nerves and wristbelow elbow and below elbow-above elbow areas of the ulnar nerve, as well as in muscle activity of all muscles except the biceps brachii. These findings indicate that dynamic neural mobilization was effective in increasing peripheral NVC and altering the muscle activity.

Simulated Dynamic C&C Server Based Activated Evidence Aggregation of Evasive Server-Side Polymorphic Mobile Malware on Android

Han Seong Lee,Hyung-Woo Lee 한국인터넷방송통신학회 2017 Journal of Advanced Smart Convergence Vol.6 No.1

Diverse types of malicious code such as evasive Server-side Polymorphic are developed and distributed in third party open markets. The suspicious new type of polymorphic malware has the ability to actively change and morph its internal data dynamically. As a result, it is very hard to detect this type of suspicious transaction as an evidence of Server-side polymorphic mobile malware because its C&C server was shut downed or an IP address of remote controlling C&C server was changed irregularly. Therefore, we implemented Simulated C&C Server to aggregate activated events perfectly from various Server-side polymorphic mobile malware. Using proposed Simulated C&C Server, we can proof completely and classify veiled server-side polymorphic malicious code more clearly.

수정된 전역 DWA에 의한 자율이동로봇의 경로계획

윤희상(Hee-Sang Yoon),박태형(Tae-Hyoung Park) 대한전기학회 2011 전기학회논문지 Vol.60 No.2

The global dynamic window approach (DWA) is widely used to generate the shortest path of mobile robots considering obstacles and kinematic constraints. However, the dynamic constraints of robots should be considered to generate the minimum-time path. We propose a modified global DWA considering the dynamic constraints of robots. The reference path is generated using A* algorithm and smoothed by cardinal spline function. The trajectory is then generated to follows the reference path in the minimum time considering the robot dynamics. Finally, the local path is generated using the dynamic window which includes additional terms of speed and orientation. Simulation and experimental results are presented to verify the performance of the proposed method.

취약계층을 위한 개인 이동체 개발 연구

한광호(Kwang Ho Han),이철희(Chul-Hee Lee) 유공압건설기계학회 2021 드라이브·컨트롤 Vol.18 No.4

A personal mobility withstanding function for the disabled and vulnerable groups with difficulties in mobility was developed and structural and dynamics analysis was conducted. Personal mobility devices are a very helpful means of transportation for the disabled and vulnerable groups. In addition, the standing function allows individuals to perform a difficult task in while seated and offers a medical advantage to the user. In this study, a personal mobility device was designed and developed to help vulnerable groups and disabled people overcome limited mobility, and communicate with the general people at eye level through standing functions. Through structural and dynamic analysis, the structural safety, optimal speed during rotation, and lateral acceleration of the personal mobility device was analyzed. The analysis results are expected to contribute to the improvement of the users’ convenience and stability of personal mobility.

Matching Matrix를 사용하여 운전자와 승객의 관계를 반영한 강화학습 기반 유동적인 가격 책정 체계

박준형,이찬재,윤영 한국ITS학회 2020 한국ITS학회논문지 Vol.19 No.6

최근 통합교통서비스(Mobility-as-a-Service)의 개념을 도입하여 이용자들의 이동성과 접근성 을 향상시키고자 하는 연구가 진행되고 있다. 특히 카셰어링, 택시 등 에 대해 수요와 공급에 따라 지역을 구분하여 가격을 책정하는 유동적인 가격 책정 전략을 도입하여 단일 요금제가 가지는 서비스 기피 등의 문제를 해결함과 동시에 기업과 운전자들의 수익성에 긍정적인 영향 을 줄 수 있을 것으로 기대되고 있다. 본 연구에서는 승객과 운전자간의 배차거리, 승객의 운행 거리, 승객의 목적지에 대한 HDBSCAN 알고리즘을 통해서 정밀하게 인식된 수요 밀집지역, 승객과 운전자가 생각하는 선호가격을 고려하여 승객과 운전자의 입장에서 Matching Matrix를 생성한다. 이를 조합하고 보상에 반영하여, 강화학습이 더욱더 현실적인 유동적인 가격 책정 전략을 도출할 수 있는 새로운 방법론을 제안한다. Research interest in the Mobility-as-a-Service (MaaS) concept for enhancing users’ mobility experience is increasing. In particular, dynamic pricing techniques based on reinforcement learning have emerged since adjusting prices based on the demand is expected to help mobility services, such as taxi and car-sharing services, to gain more profit. This paper provides a simulation framework that considers more practical factors, such as demand density per location, preferred prices, the distance between users and drivers, and distance to the destination that critically affect the probability of matching between the users and the mobility service providers (e.g., drivers). The aforementioned new practical features are reflected on a data structure referred to as the Matching Matrix. Using an efficient algorithm of computing the probability of matching between the users and drivers and given a set of precisely identified high-demand locations using HDBSCAN, this study developed a better reward function that can gear the reinforcement learning process towards finding more realistic dynamic pricing policies.