• 한국지형학회지
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• 제19권2호
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• pp.187-195
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• 2012

일본 홋카이도의 다이세츠산 국립공원은 지형 조건상 삼림한계를 넘는 고산대가 광범위하며, 지표지질은 침식에 취약한 화산쇄설물로 이루어져 있다. 또한 등산 성수기와 융설기가 시기적으로 겹치므로 답압, 융설수, 서릿발에 의한 토양침식이 등산로를 따라 활발하게 일어난다. 특히 융설수에 의한 노면 세굴과 서릿발에 의한 측벽 후퇴가 결합하여 등산로 단면이 크게 확대될 수 있으며, 세굴로 인하여 걷기 불편해진 등산로를 벗어나 걸음으로써 노면분기도 빈번하게 일어난다. 비탈면 구간에서 발생한 토사는 등산로 아래쪽으로 흘러내려와 노면뿐 아니라 주변 초지까지 매몰시키며 2차적인 훼손을 일으키고 있다.

• PNF and Movement
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• 제15권1호
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• pp.105-113
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• 2017

Purpose: The purpose of this case study was to examine the effects of an intervention based on the concept of proprioceptive neuromuscular facilitation (PNF) on the weight-supporting ability, fear of falling, and stair-walking ability of stroke patients. Methods: One pretest, three intervention sessions, and one posttest were conducted. In the tests, weight-supporting ability, manual muscle strength, the fear of falling, and the time to go up and down a 'ㄱ'-shaped stair-walking machine were measured and compared. The intervention was implemented for 30 minutes per day for three days in combination with general rehabilitation. The intervention was planned and implemented based on the concept of PNF, and the goal was for the subjects, after their consent, to walk backward down the stairs. Results: After the intervention, functional improvement was seen in weight-supporting ability and the fear of falling felt when walking down the stairs. Whereas the subjects could not perform the task of walking down the stairs on the 'ㄱ'-shaped stair-walking machine in the pretest, they could perform the task in the posttest, and their stair-climbing speed was greater than before the intervention. Conclusion: This study verified that a PNF-based intervention can improve stroke patients' weight-supporting ability and stair-walking ability. Therefore, this intervention can be clinically applied to stroke patients.

• 한국기계가공학회지
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• 제20권10호
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• pp.80-87
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• 2021

Our study introduces an improved modular agricultural platform to provide convenience to agricultural workers. We upgrade the platform design in three parts, namely, by adding a 458 pattern tire, electricity control, and four-wheel steering function, to improve the platform performance. Results showed that the upgrades enhanced the platform performance and reduced its overall weight as compared with the existing platform. To demonstrate the performance of our improved platform, we conducted five types of experiments with respect to the climbing angle, variable width, attitude control, speed, and obstacle passing.

• ETRI Journal
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• 제43권2호
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• pp.260-271
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• 2021

This paper addresses Very large-scale integration (VLSI) placement optimization, which is important because of the rapid development of VLSI design technologies. The goal of this study is to develop a hybrid algorithm for VLSI placement. The proposed algorithm includes a sequential combination of a genetic algorithm and an evolutionary algorithm. It is commonly known that local search algorithms, such as random forest, hill climbing, and variable neighborhoods, can be effectively applied to NP-hard problem-solving. They provide improved solutions, which are obtained after a global search. The scientific novelty of this research is based on the development of systems, principles, and methods for creating a hybrid (combined) placement algorithm. The principal difference in the proposed algorithm is that it obtains a set of alternative solutions in parallel and then selects the best one. Nonstandard genetic operators, based on problem knowledge, are used in the proposed algorithm. An investigational study shows an objective-function improvement of 13%. The time complexity of the hybrid placement algorithm is O(N2).

• 대한방사선기술학회지:방사선기술과학
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• 제42권3호
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• pp.181-186
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• 2019

Transarterial chemoembolization is one of the most representative procedures for puncture of the femoral artery. In addition, the same procedure is often repeatedly performed many times, and Hepatocellular carcinoma patients due to cancer is significantly lowered blood tests, regardless of platelet counts are not good enough to stop bleeding. More importantly, hepatocellular carcinoma has a high degree of complication and disease severity, which makes it less likely that the condition of the body will be relatively inferior to other patients. In order to prevent delayed hemorrhage of the femoral artery puncture site after the procedure, it is advised to absolutely stabilize the limb so that it does not bend the limb for 3 hours after climbing in the ward. Therefore, I have been complaining about inconvenience. In addition, in order to prevent delayed hemorrhage after hemostasis, balloon type hemostatic device was used instead of sand bag which was placed on hemostatic site. The results of this study were compared with the results of actual application. The use of a balloon-type hemostatic device to increase the effectiveness of continuous hemostasis and to minimize the inconvenience during the time of patient's absolute bed rest, rather than raising the sandbag to prevent primary delayed hemorrhage by various methods in transarterial chemoembolization. It can be used as a substitute for existing sand bags because it can alleviate pain, increase satisfaction, and can be used as a disposable one.

• 중환자간호학회지
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• 제15권1호
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• pp.24-34
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• 2022

Purpose : This descriptive survey aims to identify the prevalence of factors associated with sarcopenia among hemodialysis patients. Methods : The study subjects were 137 patients with chronic kidney failure undergoing hemodialysis in three artificial kidney centers in B and Y cities. Data were collected from August 1 to September 30, 2020, using the SARC-F (Strength, Assistant walking, Rising from a chair, Climbing stairs, Falls) questionnaire, Mini Nutritional Assessment-Short Form (MNA-SF), International Physical Activity Questionnaire (IPAQ-SF), Bioelectrical Impedance Analysis (BIA), and a grip dynamometer. The collected data were analyzed using t-tests, crossover analysis, and logistic regression using the IBM SPSS 23 program. Results : The prevalence of sarcopenia among hemodialysis patients, determined using the SARC-F questionnaire, was 16.1%. The associated factors of sarcopenia among hemodialysis patients were found to be gender (OR=6.44, p =.002), age (OR=1.07, p =.015), nutritional status (OR=10.37, p =.027), and albumin level (OR=0.10, p =.014). These findings are supported by an explanatory power of 46.3% (p =.597). Conclusion : The identified risk factors for sarcopenia in hemodialysis patients were; sex, age, nutritional status, and albumin level. The findings of this study can serve as clinical evidence for the development of an intervention program for preventing and managing sarcopenia in patients undergoing hemodialysis.

• 로봇학회논문지
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• 제17권3호
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• pp.288-295
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• 2022

This study shows a system identification method of a balancing loading device for a stair climbing delivery robot. The balancing loading device is designed as a 2-axes gimbal structure and is interpreted as two independent pendulum structures for simplifying. The loading device's properties such as mass, moment of inertia, and position of the center of gravity are changeable for luggage. The system identification process of the loading device is required, and the controller should be optimized for the system in real-time. In this study, the system identification method is based on least squares method to estimate the unknown parameters of the loading device's dynamic equation. It estimates the unknown parameters by calculating them that minimize the error function between the real system's motion and the estimated system's motion. This study improves the accuracy of parameter estimation using a null space solution. The null space solution can produce the correct parameters by adjusting the parameter's relative sizes. The proposed system identification method is verified by the simulation to determine how close the estimated unknown parameters are to the real parameters.

• 국제초고층학회논문집
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• 제11권2호
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• pp.103-114
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• 2022

Tower crane is of great importance in the construction of high rise buildings. A self-lifting & slewing multi-cranes platform (referred to as crane slewing platform) was developed to optimize the configuration of tower cranes, as well as solve the problems of cooperative operation conflict between multiple cranes and other construction equipment and their respective climbing and occupying of construction period. The design and test of the slewing platform was introduced. By applying the slewing platform in the construction of Chengdu Greenland Center super high rise building project, some key technologies such as the configuration of cranes, the installation, construction and lifting of the slewing platform are implemented and validated. Up to now, the slewing platform has been safely lifted up 98 times in Chengdu Greenland Center project construction, and achieved good social and economic benefits.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.65-69
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• 2015

The aim of this paper is to identify and rank the main causes of fall accidents from scaffolding according to their relative importance as perceived by project managers and site engineers in construction projects in the Gaza Strip. A total of 50 questionnaires were distributed to project managers and site engineers, 35 questionnaires were received yielding 70% response rate. A total of 33 factors that cause fall accidents in scaffolding were identified through a literature review and consolidated by a pilot study. These factors were categorized into six groups: factors related to erection, factors related to the staff (Scaffolders), factors related to loads, factors related to the personal safety, factors related to the workers behavior, factors related to the personal competencies. The results indicated that factors related to the workers behavior are the major factors that caused fall accidents from scaffolds. The results revealed that the top ranked factors which caused falls accidents from scaffolding were: absence of personal protective equipment (PPE), missing ladders, wind loads, disguised the design code, lack of proper assembly or inspection, overhead tools and materials, climbing and neglect using ladders, lack of guardrails, missing bracing and working during fatigue. These findings would help contractors to understand the top factors that caused fall accidents so that they can take them into consideration in safety planning in order to minimize the possibility of their occurrences.

• 한국전자통신학회논문지
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• 제19권1호
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• pp.283-288
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• 2024

본 논문에는 장애물들을 극복할 수 있는 새로운 메커니즘을 연구하기 위해 장애물 극복 전 방향(ALL-Direction) 주행 RC 카를 제작하여 여러 가지 장애물이 있는 시험장을 제작해 주행평가를 진행한다. RDS3115 서보모터를 제어하는 알고리즘을 제안하고, 자이로센서를 활용하여 여러 장애물 지형의 기울기를 인식하고 RC 카가 지형을 넘을 수 있는 서보모터의 각도를 조절한다. 시험장 지형 실험에서 제작한 모든 장애물 지형들을 주행하는 데 있어서 가장 적합한 RC 카의 회전 각도를 확인하였다.