• 대한건축학회논문집:계획계
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• 제35권7호
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• pp.25-32
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• 2019

The purpose of the study is to survey the needs of the elderly for ICT-based Elderly Home Remodeling by Applying Kinetic Principle. This is conducted for elderly people over 60 years old living in Seoul and Gangreung district. The study is performed by the following approaches: First, This study is based on 'the Elements of Planning for ICT-based elderly Home Remodeling by applying Kinetic Principle'(Lee 2018). Second, the needs survey for house remodeling was conducted for elderly. Finally, To analyze the required characteristics of the elderly for remodeling by using SPSS statistics 25 analysis program. The conclusion of this study is as follows. Priority elements for house remodeling should be provided to ensure the safety of the elderly through emergency call buttons, glucometer, pressure-measuring gauge, weighing instruments, and warning devices. Kinetic principles should be applied to make minimal structural changes, as easy as possible remodeling, and devices should be designed to be easy to operate.

• 한국산업정보학회논문지
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• 제22권5호
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• pp.31-37
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• 2017

본 논문에서는 자동화 계측 시스템 설계를 통하여 액상황산알루미늄 제조 공정을 개선하였다. 액상황산알루미늄 제조과정은 대용량의 무게를 사용하며 제품의 품질이 생산과정에서 투입되는 원료의 비율에 높게 의존하기 때문에 정밀한 중량 분석이 매우 중요하다. 자동화설계를 위하여 대용량의 무게를 정밀하게 측정할 수 있는 로드셀 센서와 자동화 공정에서 가장 많이 활용되는 PLC 기술을 적용하였다. 자동화 시스템을 사용하기 전에 생산된 황산알루미늄에 포함된 산화알루미늄의 함량은 8.023% ~ 8.250%의 변화가 나타났으나 자동화 시스템 적용 이후에는 8.09% ~ 8.109% 로 변화폭이 크게 감소하였다. 그 결과 계량오차에 의한 품질 불량률을 감소시킬 수 있었으며 물과 재이용수의 부정확한 투입으로 인한 반응제품의 역류 현상과 같은 안전사고를 감소시킬 수 있었다.

• 한국전산구조공학회논문집
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• 제20권4호
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• pp.463-468
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• 2007

최근 일본에서 발생한 지진으로 이동통신용 전자장비들이 많이 파손되었으나. 국내에서 제작되어 일본에 설치된 모제품은 강진에서도 대부분 구조적 손상이 없었다. 본 논문에서는 이동통신 네트워크 장비의 정/동적 특성을 평가하기 위하여 제품의 유한요소 모델을 생성하여 정적 및 동적 구조해석을 수행하였다. 또한 Zone 3 GR-63-CORE 동적 실험을 수행하여 제품의 안정성을 검증하였고, 유한요소 구조해석 결과와 비교하여 실험과 해석 결과가 유사함이 입증되었다. 구조해석 결과인 동적 응답특성은 실험보다 다소 크게 나왔으며, 부재의 특성파악을 위해 구조물의 치수를 설계변수로 하여 진동특성에 대한 민감도 해석으로 고유진동수에 민감한 부재를 판별하였고, 치수변경으로 경량화 설계치를 산출하였다. 경량화된 디자인의 동적 응답변위가 원래 디자인보다 작게 나와 최적화 결과가 유용할 것으로 보인다.

• International Journal of Aeronautical and Space Sciences
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• 제3권1호
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• pp.61-73
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• 2002

This paper addresses the conceptual design results of the HAUSAT-1 (Hankuk Aviation University SATellite-1), developed by Space System Research Lab. of Hankuk Aviation Univ., which is a new generation picosatellite. This project has been funded by Korean Government for the purpose of developing the space core technology. This is the first attempt at the level of university in Korea to develop the satellite weighing less than 1kg and accelerates opportunities with low construction, low launch cost space experiment platforms. The purpose of the HAUSAT-1 project is to offer graduate and undergraduate students great opportunities to be able to understand the design process of satellite development as a team member. Its mission objectives are to track its position by the GPS receiver system, to deploy the thin film solar cell panel to generate extra power, and to measure plasma density and temperature with the plasma sensor. The HAUSAT-1 will orbit at the altitude of 650 km with 65 degree inclination angle with 12 months of design mission life. It is planned to be launched on November 2003 by Russian launch vehicle "Dnepr".

• Structural Monitoring and Maintenance
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• 제9권1호
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• pp.43-57
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• 2022

One of the instances which demand structural engineer's greatest attention and upgradation is the changing live load requirement in bridge design code. The challenge increases in developing countries as the pace of infrastructural growth is being catered by the respective country codes with bigger and heavier vehicles to be considered in the design. This paper presents the case study of India where Indian Roads Congress (IRC) codes in its revised version from 2014 to 2017 introduced massive Special vehicle (SV) around 40 m long and weighing 3850 kN to be considered in the design of road bridges. The code does not specify the minimum distance between successive special vehicles unlike other loading classes and hence the consequences of it form the motivation for this study. The effect of SV in comparison with Class 70R, Class AA, Class A, and Class B loading is studied based on the maximum bending moment with moving load applied in Autodesk Robot Structural Analysis. The spans considered in the analysis varied from 10 m to 1991 m corresponding to the span of Akashi Kaikyo Bridge (longest bridge span in the world). A total of 182 analyses for 7 types of vehicles (class B, class A, class 70R tracked, class 70R wheeled, class AA tracked, AA wheeled, and Special vehicle) on 26 different span lengths is carried out. The span corresponding to other vehicles which would equal the bending moment of a single SV is presented along with a comparison relative to Standard Uniformly Distributed Load. Further, the results are presented by introducing a new parameter named Intensity Factor which is proven to relate the effect of axle spacing of vehicle on the normalized bending moment developed.

• 성인간호학회지
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• 제28권3호
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• pp.302-313
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• 2016

Purpose: The objective of this study was to identify factors related to self-care adherence in symptomatic patients with heart failure (HF). Methods: Using a cross-sectional design, a convenience sample 209 outpatient clinic patients were recruited at two medical centers. Between October 2011 and August 2012, data were collected using the structured questionnaire. Factors related to self-care adherence were examined using hierarchical multiple regression. Results: Mean age of participants was 67.71 years and a half of them (53.6%) were female. They showed relatively low self-care adherence with mean scores of $61.88{\pm}12.92$. Lower self-care adherence was reported in asking for low sodium items, weighing oneself, checking for ankle edema, and exercising for 30 minutes. The overall model significantly explained 23.9% of variance in self-care adherence. Among the predictors, education, New York Heart Association functional classification, and social support were statistically significant in influencing self-care adherence. The variable of negative emotional status such as anxiety and depression were not found to be significant. Conclusion: These findings demonstrate that social support could help self-care adherence among symptomatic patients with HF. Thus, programs targeting self-care adherence in this population should consider the strategies improving social support.

• Asian-Australasian Journal of Animal Sciences
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• 제3권4호
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• pp.299-303
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• 1990

Twenty-four Harnai lambs 6 to 7 month old, weighing $16{\pm}2kg$ were used in a completely randomized design in growth and digestibility trials to study fourwing saltbush ratio supplemented with cotton seed cake. The animal were divided at random into three groups of 8 animals each. Three iso-nitrogenous (10.5% CP) experimental rations (1, 2 and 3) containing wheat straw + lucerne hay (24:76); fourwing saltbush (Atriplex canescens) + cotton seed cake (71:29); and wheat straw + cottonseed cake (41:59); respectively, were allotted to each group randomly. All the animals were taken out for grazing in a dormant native range for about 3 hours in the afternoon during the growth trial. The growth trial lasted for 8 weeks followed by a digestibility trial. At the end of 8 weeks lambs on ration 3 had gained significantly (p<0.10) more weight compared to those on rations 1 and 2 which maintained their body weight. The crude protein digestibility of the fourwing saltbush based ration was comparable with the other two treatments (71 vs 70 and 71%). However, the digestibility of dry matter (41%), acid detergent fibre (13%) and neutral detergent fibre (22%) of this ration was significantly lower (p<0.10) than the other two diets. The results suggest that lambs can be maintained on fourwing saltbush during winter without significant loss in body weight with 30% extra protein concentrate supplementation.

• Asian-Australasian Journal of Animal Sciences
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• 제24권11호
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• pp.1607-1614
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• 2011

This trial was conducted to determine the effects of including canola protein concentrate in diets fed to broiler chickens on nutrient digestibility and broiler performance (0-21 days). A total of 180, day-old, male broiler chicks weighing an average of 52.8${\pm}$0.6 g were assigned to one of six dietary treatments in a completely randomized design. The control diet was based on corn and soybean meal and contained 15% canola meal. The experimental diets contained 3, 6, 9, 12 or 15% canola protein concentrate added at the expense of canola meal. There were five birds per pen and six replicate pens per treatment. Feed and water were available ad libitum throughout the 21-day experiment. Chromic oxide (0.35%) was added to all diets as a digestibility marker and was fed throughout the experimental period. The digestibility of dry matter, energy and phosphorus increased linearly (p<0.01) with increasing levels of canola protein concentrate. Although nutrient digestibility was higher for birds fed diets containing canola protein concentrate, these improvements did not translate into improvements in broiler performance. Weight gain was unaffected (p = 0.24) by level of canola protein concentrate. Feed intake was significantly increased (p<0.01) with the result that feed conversion tended to be poorer (p = 0.07) for birds fed diets containing canola protein concentrate. Mortality was also unaffected (p = 0.56) by dietary treatment.

• 한국생산제조학회지
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• 제22권6호
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• pp.937-944
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• 2013

This paper describes an improved model that can be used for configuring a non-contact pneumatic head to handle a large sheet of glass. The cylindrical head model is of a large size (70 mm). It operates on vortex flow, which can simultaneously generate suction and repulsion over the flat object's surface. The head allows for the minimal non-contact lifting of objects weighing over 3N by using reference conditions (working pressure and head dimensions). Additionally, a functional flow-guide is applied for inducing a developing tangential vortex flow to increase suction and repulsion to the reference head. The cylindrical flow-guide is associated with relatively low tangential velocity. The improved model generates greater lifting force than the reference model, as verified experimentally.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.267-268
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• 2006

The cylinder cover stud of low-speed marine diesel engine is more than just a stud. It is a large structural element occasionally weighing over 200 kg used for assembling the combustion chamber components. Therefore, to understand the structural behavior of the stud and design it safely is quite important considering a catastrophic failure which can be arisen from an inadequate use of it. In this paper, the analysis results of the structural behavior of the stud is introduced. Strain measurement results compared with FE analysis results are summarized. The results showed that 1) the stud stress increased with engine operating load, 2) the maximum stress amplitude was about 10 MPa which is far smaller than the stud's fatigue strength of 61 MPa, 3) the stress ratio is higher than 0.9 and the stud's load factor is about 20 %, and 4) about 7 % of initial pressure tightening load was reduced while changing to a nut tightened condition.