• 한국정밀공학회지
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• 제15권11호
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• pp.76-82
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• 1998

In this study, the Ball screw and Servo motor Mechanism is considered as a High Speed Tool Feed System for the machining of a piston of a reciprocating engine. For the machining of a piston, that shapes oval, high speed servo mechanism is needed as a positioning of a cutting tool, and the stroke of tool is 0.1 mm ~ 1 mm. Ball screw and servo motor Mechanism is available very much because this mechanism is used widely in general machine. This Mechanism has been designed with the use of the decrease in mass and partial wear of the ball screw for high speed positioning of tool. Also the periodic learning control method with the inverse transfer function compensation has been applied to the positioning control for the high accuracy positioning of tool. These applications lead the achievement of the machining of a piston with an accuracy of 5${\mu}{\textrm}{m}$ at 2500 rpm in CNC turning.

• 센서학회지
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• 제30권2호
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• pp.67-70
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• 2021

A new button-shaped electrical device was developed for a smart fabric. This electric button can be sewn anywhere on the garment, similar to a traditional button fastener. t not only performs a decorative function but also makes the fabric suitable for use in Internet of Things (IoT) applications. It has metallic through-holes such that it can be fastened onto a fabric by conductive sewing threads. When threaded through metallic holes, the button can communicate with the external device by transmitting and receiving data. In addition, it adds specific functions by stacking a detachable application layer on the base layer. It is robust to frequent washing, and thus has excellent repeatability for use as an IoT device. The feasibility of the electric button was successfully demonstrated by its ability to identify the physical activities of walking and running, monitoring ambient temperature, and turning on LED lights.

• 한방비만학회지
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• 제22권1호
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• pp.77-85
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• 2022

While the Coronavirus disease 2019 (COVID-19) pandemic is gradually turning into an endemic disease, concerns about post COVID-19 conditions (Long COVID) are emerging. Obesity is a major risk factor for severe complications of COVID-19, and COVID-19 has a wide range of effects on obesity and metabolic function. This paper aims to examine the interaction between COVID-19 and obesity, the effects and mechanisms of long COVID on obesity, and the role of Korean medicine on long COVID-related obesity. Obesity may worsen with cardiometabolic damage and psychosocial insecurity during COVID-19 and long COVID-induced neuroinflammation, systemic inflammation, mitochondrial dysfunction, and hypoxia also may aggravate obesity. Korean Medicine treatments, which have been widely used to treat obesity, have the potential to improve obesity in the era of long COVID by intervening in these mechanisms.

• Mass Spectrometry Letters
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• 제14권4호
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• pp.173-177
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• 2023

Kendrick plots offer an alternative visualization of mass spectral data which reveals ion series and patterning by turning a mass spectrum into a map, plotting the fractional mass (wrongly called mass defect) as a function of mass-to-charge ratios and ion abundances. Although routinely used for polymer mass spectrometry, two unreported applications of these Kendrick plots are proposed using the program "kendo2": the graphical recalibration of a mass spectrum via the simulation of a theoretical fractional mass and a multi-segment fit; and the rapid evaluation of scan-to-scan variation of accurate mass measurements used as tolerances for the blank subtraction of UPLC-MS data files. Both applications are compatible with any type of high-resolution MS data including LC/GC-MS(/MS).

• 정보처리학회논문지D
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• 제15D권3호
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• pp.375-386
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• 2008

최근 정보시스템 개발 패러다임이 객체지향 및 컴포넌트 기반으로 변해가고 있으며 이러한 방법론이 소프트웨어 산업계를 주도하고 있다. 소프트웨어 비용측정 분야도 이러한 변화에 적응하기 위해서 OO 환경에 적합한 비용 측정 모델로의 전환이 요구되고 있으며 실제 UCP 기법 등 객체지향 개념의 기능점수 연구가 진행되고 있다. 특히 객체지향 기능점수 측정 기법은 사용사례 중심으로 개발 프로젝트 초기에 적용 가능하고, 개발 진행 단계별 소프트웨어 산출물에 따라 생명주기 전체에 걸쳐서 적용 가능하고, UML 표기법에 의한 사용자와 의사소통으로 이해가 항상 가능하기 때문에 LOC 및 기존 기능점수 측정 기법의 한계를 극복하는 장점이 있다. 따라서 본 논문은 최근 객체지향 정보시스템 개발 환경에서 널리 사용되고 있는 UML 표기법 및 국방 CBD 방법론 절차에 의한 정보시스템 개발 프로젝트 진행에 따라 초기단계 시점(ROFP)과 분석단계 시점(AOFP)에서 기능점수를 측정하며, 전통적인 FPA 모델과 객체지향 FPA 모델을 통해 UML 모델링과 산출물을 기반으로 한 유스케이스와 클래스의 상관도 분석에서 서비스 기능과 객체/클래스 기능을 식별하고 기능점수를 구하는 측정기법을 제안한다. 무엇보다 전통적인 기능점수 측정 기법인 IFPUG-CPM 및 소프트웨어 대가기준의 기능점수 측정기법을 개선하여 객체지향 정보시스템 개발에 적합한 기능점수 측정 프로세스를 제시하고 사례연구를 통한 적합성 평가 결과를 제시한다.

• 한국측량학회지
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• 제33권1호
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• pp.45-52
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• 2015

공간정보 제작의 다원화로 인하여 다양한 수치지도들이 여러 공공기관 및 기업에서 제작됨에 따라 데이터의 상호 운용성이 점점 중요해지고 있다. 이에 본 연구에서는 계층적 매칭 기법을 활용한 이종 수치지도의 건물 데이터 자동 정합기법을 제안하였다. 먼저 수치지도를 가구계 기반으로 분할한 후 ICP 알고리즘을 활용한 건물 기하보정을 1차적으로 수행하였다. 대응 가능한 건물쌍의 중첩면적 유사도를 평가하여 대응 건물을 결정하고 Otsu 이진 임계화를 수행하여 매칭 비매칭에 대한 임계값을 자동으로 설정하였다. 1차 매칭이 완료된 후 임계값과 비슷한 유사도를 가지는 건물들을 오매칭 후보군으로 추출하여 개별 건물에 대한 ICP 알고리즘 기반의 기하보정을 다시 수행하고 형태학적 인자인 회전각 함수분석을 추가 적용하여 정합여부를 재판단하였다. 실험평가를 위해 제안된 알고리즘을 대표적인 공공분야 수치지도인 도로명주소지도와 수치지형도 2.0의 건물 데이터에 적용하고 활용성을 평가하였다. 정확도 평가결과 매칭 건물 및 비매칭 건물에 대한 F 측정치가 각각 2%와 17% 향상되었으며 이를 통해 본 연구에서 제안한 알고리즘이 이종 수치지도 건물 정합에 효과적으로 적용될 수 있음을 확인하였다.

• 재활복지공학회논문지
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• 제10권4호
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• pp.251-257
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• 2016

소아균형검사(Pediatric Balance Scale)는 경증이나 중증의 운동손상을 지닌 학령기 아동에게 사용할 수 있는 균형검사도구이다. 본 연구의 목적은 경직성 양하지 뇌성마비 아동을 대상으로 소아균형검사와 시공간적 보행변수간의 상관관계를 알아보고자 하였다. 소아균형검사는 앉은 자세에서 일어나기, 선 자세에서 앉기, 의자에서 의자로 이동하기, 잡지 않고 서 있기, 한 다리로 서 있기, 제자리에서 $360^{\circ}$ 회전하기, 뒤돌아보기 등 총 14개 항목으로 구성하고, 시공간적 보행변수는 보행속도 및 보폭, 보거리, 보격, 분속수, 양하지 지지 시간을 포함한다. 모든 대상자들은 독립적으로 보행이 가능한 경직성 양하지 뇌성마비 아동이며, 숙련된 소아물리치료사에 의해 소아균형검사와 시공간적 보행변수를 측정하였다. 소아균형검사와 시공간적 보행변수 간의 상관관계를 분석하기 위해 피어슨 상관분석을 사용하였고, 통계학적 유의수준은 0.05로 설정하였다. 소아균형검사의 총점(r=.49~.58)과 세부항목 중 선 자세에서 앉기(r=.48~.60)와 선 자세에서 왼쪽/오른쪽 어깨 뒤로 돌아보기(r=.47~.53), 선 자세에서 바닥에 물건 집어 들기(r=.52~.69)는 보행속도와 보폭, 보거리, 분속수의 각 변수 사이에 모두 유의한 양의 상관관계를 보였으며, 소아균형검사의 대부분 항목이 양하지 지지 시간 간의 매우 높은 음의 상관관계(r=-.48~-.92)를 보여주고 있다. 이는 소아균형검사와 시공간적 보행변수는 높은 상관관계를 가진 것을 관찰 할 수 있었으며, 소아균형검사를 통해 뇌성마비 아동의 보행수준을 예견하는데 유용하게 적용될 것이다.

• 대한통합의학회지
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• 제8권2호
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• pp.11-20
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• 2020

Purpose : The purpose of this study was to research the effects of dual-hemisphere transcranial direct current stimulation (dual tDCS) and modified constraint-induced movement therapy (mCIMT) to improve upper extremity motor function after stroke. Methods : The study period was from August 2019 to November 2019, and included 24 patients who met the selection criteria. Participants were divided into 2 groups: dual tDCS and mCIMT, and sham dual tDCS and mCIMT group. Dual tDCS and mCIMT group performed mCIMT immediately after applying dual tDCS for 20 minutes, and sham dual tDCS and mCIMT group performed mCIMT immediately after applying sham tDCS for 20 minutes without turning on the power source. Total interventions were conducted 5 times per week for 4 weeks, and mCIMT was conducted for 30 minutes per session for both experimental and control groups. Fugl-Meyer assessment (FMA) and Motor Activity Log scale (MAL) were analyzed before and after 4 weeks of intervention. Results : Both experimental and control groups showed significant changes in FMA, Amount of Use (AOU), and Quality of Movement (QOM) of MAL. When the differences between groups was compared using ANCOVA, the experimental group showed a greater improvement in FMA and AOU of MAL than the control group. Conclusion : In order to enhance the effect of improving upper limb function of stroke patients, dual tDCS could be applied to provide more effective treatment in the clinical setting. Further studies will be needed in larger groups of stroke patients, including long-term follow-up, and multi-group comparisons through the establishment of anodal tDCS and mCIMT, cathodal tDCS, and mCIMT groups to clarify the effects of dual tDCS. In addition, research is needed to establish a protocol for tDCS, and this evidence-based intervention protocol is expected to be used in the clinical setting as an interventional method for various purposes.

• The Journal of Korean Physical Therapy
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• 제31권2호
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• pp.67-75
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• 2019

Purpose: Patients with brain damage suffer from limitations in performing the activities of daily living (ADL) because of their motor function and visual perception impairment. The aim of this study was to help improve the motor function and visual perception ability of patients with brain damage by providing them with virtual reality-based contents. The usability results of the patients and specialists group were also evaluated. Methods: The ADL contents consisted of living room, kitchen, veranda, and convenience store, similar to a real home environment, and these were organized by a rehabilitation specialist (e.g., neurologist, physiotherapist, and occupational therapist). The contents consisted of tasks, such as turning on the living room lights, organizing the drawers, organizing the kitchen, watering the plants on the veranda, and buying products at convenience stores. To evaluate the usability of the virtual reality-based visual cognitive rehabilitation service, general elderly subjects (n=11), stroke patients (n=7), stroke patients with visual impairment (n=4), and rehabilitation specialists (n=11) were selected. The questionnaires were distributed to the subjects who were using the service, and the subjective satisfaction of individual users was obtained as data. The data were analyzed using SPSS 21.0 software. The general characteristics of the users and the evaluation scores of the experts were analyzed using descriptive statistics. Results: The usability test result of this study showed that the mean value of the questionnaire related to content understanding and difficulty was high, between 4-5 points. Conclusion: The virtual reality rehabilitation service of this study is an efficient service that can improve the function, interest, and motivation of stroke patients.

• 가정∙방문간호학회지
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• 제14권2호
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• pp.98-105
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• 2007

Home health care system in Korea has been classified into three types of home care programs based on different laws and regulations; for example, home health care nursing(HHCN) is based on medical laws, visiting health care nursing (VHCN) is based on long-term health care insurance, and visiting health care(VHC) is based on the regional health care act. HHCN in Korea has taken on an important role under the mandate of the national health care system since 2000. VHCN will commence its role under the long term health care insurance system in 2008. The strengthening of VHC commanded health promotion and prevention for vulnerable families in the community in 2007. This is an important turning point for increasing quality management for home health care program; it suggests certain possibilities for building a foundation for further changes in the service delivery structure. Accordingly, the home health care policy makers in Korea have a major function and role that consists of developing an agenda and alternatives for policy making in a systematic manner and clearly presenting implementation strategies for elderly health care system.