• Applied Chemistry for Engineering
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• v.17 no.5
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• pp.458-464
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• 2006

The Pd-Ni-Ag alloy composite membrane using modified porous stainless steel (PSS) as a substrate was prepared by a electroless plating technique. In this work, we have introduced the intermediate layer between Pd-based alloy and a metal substrate. As an intermediate layer, the mixtures of nickel powder and inorganic sol such as $SiO_{2}$ sol, $Al_{2}O_{3}$ sol, and $TiO_{2}$ sol were used. The intermediate layers were coated onto a PSS substrate according to various membrane preparation conditions and then $N_{2}$ fluxes through the membranes with different intermediate layers were measured. The surface morphology of the intermediate layer in the mixture of nickel powder and inorganic sol was analyzed using scanning electron microscope (SEM). Finally, the Pd-Ni-Ag alloy composite membrane using the support coated with the mixture of nickel powder and silica as an intermediate layer was fabricated and then the gas permeances for $H_{2}$ and $N_{2}$ through the Pd-based membrane were investigated. The selectivity of $H_2/N_2$ was infinite and the $H_{2}$ flux was $1.39{\times}10^{-2}mol/m^2{\cdot}s$ at the temperature of $500^{\circ}C$ and trans-membrane pressure difference of 1 bar.

• Journal of Digital Convergence
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• v.14 no.9
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• pp.515-523
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• 2016

This study applied a home therapy convergence program to patients who had undergone mastectomy and examined its effects on their arm functions, occupational performance, quality of life, and depression. The number of subjects was 20. The subjects were those who visited an occupational therapy room as outpatients and received the intervention twice per week, forty minutes per each time, for 12 weeks. In order to look at their arm functions before and after the intervention, K-DASH was employed and their edema was measured with a tape line. In order to examine their occupational performance, quality of life, and depression before and after the intervention, COPM, FACT-B, and BDI, respectively, were utilized. After the intervention, their arm functions significantly increased, but their edema did not significantly decrease, their occupational performance and quality of life significantly improved, and their depression was significantly reduced. Thus, a home education convergence program positively affected mastectomy patients' arm functions, occupational performance, quality of life, and depression.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.10
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• pp.723-730
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• 2013

This paper presents the design of an arm gesture recognition system using Kinect sensor. A variety of methods have been proposed for gesture recognition, ranging from the use of Dynamic Time Warping(DTW) to Hidden Markov Models(HMM). Our system learns a unique HMM corresponding to each arm gesture from a set of sequential skeleton data. Whenever the same gesture is performed, the trajectory of each joint captured by Kinect sensor may much differ from the previous, depending on the length and/or the orientation of the subject's arm. In order to obtain the robust performance independent of these conditions, the proposed system executes the feature transformation, in which the feature vectors of joint positions are transformed into those of angles between joints. To improve the computational efficiency for learning and using HMMs, our system also performs the k-means clustering to get one-dimensional integer sequences as inputs for discrete HMMs from high-dimensional real-number observation vectors. The dimension reduction and discretization can help our system use HMMs efficiently to recognize gestures in real-time environments. Finally, we demonstrate the recognition performance of our system through some experiments using two different datasets.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.131-141
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• 2020

The purpose of this study is to compare the effects on nursing students' knowledge, performance confidence, and skills from combined virtual IV simulator and mannequin arm IV cannulation training against training with a mannequin arm only. A non-equivalent control group pretest-posttest experimental study was carried out. Ninety-three sophomore nursing students who were just beginning their fundamental skills training were recruited. Participants were divided into two groups (46 for the combined group and 47 for the mannequin-only group). Data were collected from March 18-29. For the experimental group, both virtual IV simulator and mannequin-arm training were provided for 30 minutes (15 minutes each). For the control group, training for 30 minutes with a mannequin arm only was provided. After intervention, there was no statistically significant difference in the knowledge score between the two groups (F=2.52, p=.116). However, there was a significant improvement in performance confidence (t=2.14, p=.035) and nursing skills (t=5.34, p<.001) in the experimental group, compared with the control. Overall, this study provides empirical evidence that the combination of virtual IV simulator and mannequin arm training may further enhance nursing students' performance confidence and nursing skills.

• Journal of Service Research and Studies
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• v.12 no.3
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• pp.45-59
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• 2022

This study attempted to investigate how the transformational leadership perceived by flowers of telemarketing organizations. In particular, this study explored the moderating effect of followership in the relationship between transformational leadership and organizational performance. To verify the research model, 321 surveys collected from 10 domestic call centers were analyzed. Reliability, correlation, factor analysis, and hierarchical regression analysis were performed, and as a result of the analysis, it was found that the transformational leadership in the telemarketing organizations had a positive effect on organizational performance. In addition, it was confirmed that goal consistency, proactive participation, critical thinking, and team spirit, which are the four sub-variables of followership, all have a positive (+) effect on organizational performance, and both goal consistency and proactive participation moderate the relationship between transformational leadership and organizational performance. Considering the special working environment of telemarketing organizations, the results of this study suggest the need for a corporate educational role to increase transformational leadership and followership and the need to build environments by setting up an atmosphere for members to exercise follow-up, and opening up communication structures for members to follow.

• Journal of the Korean Chemical Society
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• v.56 no.1
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• pp.175-179
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• 2012

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2007.04a
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• pp.117-120
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• 2007

본 논문에서는 휴머노이드 로봇에 적용 가능한, 미래형 로봇의 발진방향인 "개방화", "네트워크화", "모듈화" 개념을 만족하는 새고운 구조의 로봇 설계를 위해 인간의 신경학적 모델을 이용한 기법을 제시하고 이를 기반으로 한 로봇에 적용하기 위한 SERCOS 통신 기반의 로봇 팔에 대한의 내부 통신망 설계 방법을 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.504-505
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• 2017

센서와 왕복 모터를 이용한 스마트 창문 여닫이 로봇 팔은 온습도 센서를 이용하여 구성되는 시스템으로 일반 사용자에게 편리하고 안전한 메타포를 제공한다.

• Journal of the Korean Vacuum Society
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• v.4 no.S1
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• pp.87-91
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• 1995

초고집적회로의 배선 금속으로 사용되는 알루미늄 합금은 치밀한 표면 산화막 때문에 화학증착법에 의하여 비어를 선택적으로 충전하기 힘들다. 본 연구에서는 기저층을 이용하여 비어에 선택적으로 화학증착함으로써 평탄화를 이루는 새로운 방법을 제안하였다. 알루미늄, 구리 등의 배선 금속, 팔라듐, 코발트 등의 금속, 기타 타이타늄 질화물 등의 기판에 대하여 화학증착 알루미늄의 특성과 실리콘 산화물간의 선택성을 평가하였으며 팔라듐, 코발트, 타이타늄 질화물 등을 기저층으로 사용한 경우에 낮은 비저항과 안정적인 선택적 비어 충전을 이룰 수 있었다.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.299-300
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• 2015

본 연구에서는 뇌졸중 환자를 대상으로 팔 흔들기 강화운동과 발목 신장운동을 실시한 실험군이 일반적인 물리치료를 실시한 대조군보다 균형과 보행속도가 향상됨을 검증하였으며, 재활치료에 있어서 하나의 중재방법이 될 수 있음을 제안한다.