• 동력기계공학회지
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• 제13권3호
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• pp.33-39
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• 2009

The aim of this study is to analyze the welds characteristics of the 205 stainless steel pipe for application of street pole material. The welds corrosion behavior of STS 205 pipe in 0.1 N sulphuric acid solution and 5% NaCl solution at room temperature was studied using both salt spray test and potentiodynamic polarization experiment. The morphology and components of corrosion products on surface of STS 205 pipe welds were investigated using SEM/EDX. The tensile strength and yield strength values of STS 205 plate were 715 MPa and 369 MPa respectively. The microvickers hardness values of STS 205 pipe welds were slightly increased than that of STS 304 pipe welds. Corrosion current density($I_{corr.}$) and critical current density($I_{crit.}$) values of STS 205 pipe welds in 3.5% NaCl solution were $1.89{\times}10^{-6}$ $A/cm^2$ and $15.8{\times}10 ^{-6}$ $A/cm^2$. The corrosion resistance of SIS 205 pipe welds was similar to its STS 304 pipe welds. The STS 205 and 304 pipe welds passive films were chromium oxide. Especially, the STS 205 pipe welds showed good corrosion resistance in 0.1 N sulphuric acid. This is attributed to the forming of protective chromium oxide on the surface of STS 205 pipe welds.

• 식물분류학회지
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• 제42권2호
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• pp.126-140
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• 2012

국내에 분포하는 나자스말속(Najas L.) 분류군의 형태적 변이를 파악하고 각 분류군의 식별형질을 검토하기 위하여 32개 정량형질을 이용하여 주성분분석을 수행하였다. 나자스말속의 분류군에서 잎의 너비, 엽초의 모양, 엽연의 거치수, 약실의 수, 한 줄에 배열하는 종자의 그물눈 수와 길이의 비 등이 유용한 식별형질로 파악되었다. 자웅이주인 민나자스말(N. marina)은 잎과 줄기, 수꽃과 암꽃, 열매가 대형으로서 자웅동주인 다른 분류군들과 뚜렷하게 구분되었다. 자웅동주인 분류군들 중에서 나자스말(N. graminea), 실나자스말(N. gracillima), 동아나자스말(N. orientalis)은 영양 형질에 의하여 식별이 가능하지만, 톱니나자스말(N. minor)과 큰톱니나자스말(N. oguraensis)은 수꽃에 있는 약실의 수에 의해서만 구분되었다.

• 대한감각통합치료학회지
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• 제19권2호
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• pp.46-59
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• 2021

목적 : 아동작업치료사의 부모상담에 관한 경험을 현상학적으로 탐색하여 추후 부모상담 기술 향상을 위한 프로그램 마련의 근거로 활용하고자 하였다. 연구방법 : 연구 방법은 Colaizzi의 현상학적 연구 방법을 적용하였다. 임상경력 8년 이상으로 사설센터에서 근무하는 아동작업치료사 6명을 대상으로 전화 인터뷰를 실시하였다. 인터뷰 내용은 연구참여자의 동의하에 녹음하였으며, 추가적인 내용 확인은 이메일로 받았다. 녹음된 내용은 전사 뒤 분석하여, 아동작업치료사의 부모상담 경험의 의미와 본질을 기술하였다. 결과 : 면담 내용을 분석한 결과 2개의 범주화, 4개 주제모음, 21개의 주제가 도출되었다. 2개의 범주화에는 부모상담의 중요성과 부모상담에 영향을 미치는 요소가 있었고, 4개의 주제모음에는 부모상담의 의미, 부모-아동-치료사 간의 상호성, 치료사의 노력, 필요한 역량이 있었다. 결론 : 본 연구의 결과는 초임 아동작업치료사에 의미있는 자료로 활용될 수 있으며 앞으로 아동작업치료사의 부모상담 기술 향상을 위한 교육 프로그램이나 자료 개발의 기초자료로 활용될 수 있을 것이다.

• 대한통합의학회지
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• 제9권3호
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• pp.135-144
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• 2021

Purpose : The purpose of this study was to investigate the effect of 2 weeks of backward walking exercise (BWE) on cervical angle and gait parameters in college students with forward head posture. Methods : Fifteen subjects participated in the experiment. All the participants had a craniovertebral angle (CVA) of 55 degrees or less. The purpose of the study was explained to all the subjects prior to participation, and volunteered to take part in the study. A camera capable of taking pictures of the lateral plane was installed at a distance of 1.5 meters from each subject. Images of forward head posture were obtained before and after performing the BWE, and the CVA and craniorotational angle (CRA) were compared pre- versus post exercise. Foot pressure and gait parameters (step length of left and right, stride length, stance of left and right, swing of left and right, step time of left and right, and stride time) were measured using a rehabilitation treadmill. The subjects performed the BWE for 2 weeks. The exercise program consisted of a 5-minute warm-up exercise, 20-minute main exercise, and 5-minute cool-down exercise. In the main exercise, the treadmill speed was set to 2.4 km/h in the first week and 3.4 km/h in the second week. A paired t test was used to compare the CVA and CRA and gait parameters before and after the exercise. Results : Comparison of the CVA and CRA before and after the BWE revealed a significant difference post exercise, with a marked improvement in forward head posture after the exercise (p<.05). Conclusion : Based on the results of this study, the BWE is considered to be an effective exercise for the forward head posture. Also, additional research is needed to shed light on the impact of the BWE on gait parameters.

• 대한통합의학회지
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• 제9권2호
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• pp.131-140
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• 2021

Purpose : The purpose of this study was to systematically review the studies on the effects of social story intervention on the individuals with autism spectrum disorders(ASD) to provide the basis for evidence-based practice. Methods : In order to find out the studies on the effect of social story intervention on individuals with ASD, studies published from 2011 to December 2020 were searched on Google Academic Search. The keywords used were "autism spectrum disorder AND social story". A total of 16,900 studies were searched, and from these, 12 studies were selected based on the application of the selection and exclusion criteria. The included studies comprised of 10 single subject design studies and 2 randomized controlled trials design studies. The included studies were analyzed in accordance to population, intervention, outcome measures and results. Results : As a result of analysing the subjects of the included studies, we found out that pre-school children and adolescents were the most common groups of individuals diagnozsed with ASD. In addition to ASD, the diagnosis of the subjects included intellectual disability, Asperger, and Prader-willi. We found out that there were more interventions that were mixed with other interventions, than just the pure social story interventions. In particular, video modeling was found to be the most frequent intervention. This was followed by photo-based social stories. For outcome measure, autism social skills profile was found to be the most often used standardized assessment. For a non-standardized assessment, social desired behavior was found to be the most frequently evaluated behavior, followed by personal problem behavior. Of all the dependent variables, the dependent variable reported as "effective" was the most, followed by "some effective". Conclusion : This study is organized to help the individuals with ASD, families, researchers, and therapists understand the effects of social story intervention on the individuals with ASD in an easy fashion. Further, therapists can use this study as the basic data for evidence-based practice.

• 디지털융복합연구
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• 제17권6호
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• pp.239-246
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• 2019

본 연구는 간호대학생들의 셀프리더십과 목표몰입이 문제해결능력에 미치는 영향을 규명하기 위한 서술적 조사연구이다. 이를 위하여 본 연구는 B광역시, D시 소재 4개 대학 간호학과에 재학중인 간호학생 201명의 설문을 수집하여 Spss /Win 21로 분석하였다. 분석결과 첫째, 인구사회학적특성에 따른 문제해결능력의 차이는 나이, 학년, 전공만족도에 따라 차이가 있었다. 둘째, 셀프리더십 및 목표몰입과 문제해결능력의 상관관계는 모두 양의 상관관계로 나타났다. 셋째 문제해결능력에 영향을 미치는 요인으로는 셀프리더십이 가장 높았고 그 다음으로 목표몰입, 연령순으로 문제해결에 영향을 미치는 것으로 나타났다. 따라서 간호대학생의 문제 해결능력을 향상하기 위해 간호대학생들의 셀프리더십과 목표몰입을 향상시킬 수 있는 중재방안이나 교육마련이 필요하다.

• 디지털융복합연구
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• 제16권11호
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• pp.553-560
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• 2018

본 연구는 이벤트 종사원의 긍정심리자본과 이직의도 간의 관계를 직무열의가 매개하는지를 파악하는데 그 목적을 두고 있다. 이를 위하여 부산지역의 이벤트업에 종사하는 20대에서 50대, 남녀 총 394명을 대상으로 하여 설문조사를 실시하였다. 연구 분석은 매개효과를 파악하기 위한 회귀분석을 실시하였으며 주요 연구결과는 다음과 같다. 첫째, 긍정심리자본은 직무열의를 정적으로 유의미하게 예측하는 것으로 나타났다. 둘째, 긍정심리자본은 이직의도를 부적으로 유의미하게 예측하는 것으로 나타났다. 셋째, 직무열의는 이직의도를 부적으로 유의미하게 예측하는 것으로 나타났다. 넷째, 직무열의는 긍정심리자본과 이직의도 간의 관계를 부분 매개하는 것으로 나타났다. 따라서 이벤트 종사원의 이직의도를 낮추고, 직무열의를 높이기 위한 근무환경 개선과 긍정심리자본을 향상 시킬 수 있는 중재 프로그램을 개발하기 위한 지속적인 연구의 필요성을 제언하였다.

• 대한통합의학회지
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• 제7권3호
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• pp.61-69
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• 2019

Purpose : The purpose of this study was to investigate the effects of Straight leg lifts (SLL) and double leg lowering (DLL) exercise on abdominal muscle activity, visual analog scale (VAS), and flexibility in patients with chronic low back pain (LBP). Methods : A total of 30 LBP patients were divided into two groups: those with SLL exercise group 15 (male=8, female=7) and those with DLL exercise group 15 (male=7, female=8). Before the intervention, the abdominal muscle activity, VAS, and flexibility were measured. After 4 weeks of intervention, the above variables were measured in the same way. The SLL exercise bends the leg $45^{\circ}$ in the supine position, and the DLL exercise was performed as opposed to SLL. At this time, the pressure biofeedback unit (PBU) was placed behind the lumbar to reduce the instability of the pelvis and muscles. The subjects were instructed to use the PBU to maintain the target pressure determined (40 mmHg) during the exercise. Results : The external oblique (EO), internal oblique (IO), and transverse abdominis (TrA) were significantly different in the SLL and DLL group, and EO, IO, and TrA activity improved more significantly increased in the DLL than SLL group (p<.05). The results on the VAS and flexibility were significantly different both group (p<.05). However, there was no significant difference between the groups (p>.05). Conclusion : SLL and DLL exercises in patients with LBP were able to confirm the increased activity of the abdominal muscles, decreased pain, and increased flexibility of the waist. In addition, DLL exercise is more effective in patients with LBP in terms of muscle activity.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2019년도 춘계학술대회
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• pp.133-136
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• 2019

최근 많은 산업용 기기들은 외부 모니터링과 제어 시스템에 프로토콜 호환성 문제에 직면하고 있다. 본 논문은 다층 통신 모듈을 사용하여 산업 통신 프로토콜 변환을 지원할 수 있는 산업용 통신 게이트웨이를 설계하였다. 산업용 통신 게이트웨이는 rs485 시리얼 통신을 이용하는 개별 통신 모듈을 다층으로 연결하는 구조를 가지고 있다. 각각의 통신 모듈은 analog data card, digital data card LAN 및 CAN 지원 카드로 구성하였다. 메인 보드 프로세서는 Atmega micro-processor를 사용하였고, rs485 시리얼 슬롯을 배치하여 다층의 통신 모듈 구조를 가지도록 하였다. 이러한 통신 모듈 적층형을 이용하여 아날로그 및 디지털 I/O 기능과 LAN과 CAN을 지원하여 산업용 통신 제어 및 모니터링에 폭넓게 사용할 수 있다.

• 대한통합의학회지
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• 제9권4호
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• pp.201-210
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• 2021

Purpose : There is a lack of research on this field in the Republic of Korea, especially those that have seen the effect of interaction between transcranial direct current stimulation and computerized cognitive rehabilitation therapy. This study divided 30 dementia patients into a treatment group, which received transcranial direct current stimulation and computerized cognitive rehabilitation, and a control group, which received pseudo-transcranial direct current stimulation and pseudo-computerized cognitive rehabilitation. This study evaluated the effects of these treatments on the visual perception, cognition functions, and daily activities of dementia patients. Methods : Fifteen subjects were allocated to the treatment group and the other 15 subjects were allocated to the control group. Treatments were given at intervals of five sessions per week (30 minutes per session) for six weeks (30 times in total). This study used the Neurobehavioral Cognitive Status Examination (NCSE) to examine cognitive functions, MVPT to evaluate visual perception, and FIM to test daily living activities before and after applying the treatments. Results : The results of this study showed that cognitive functions, visual perception, and daily living activities significantly (p<.05) improved after the intervention in the treatment group and the control group. The changes in cognitive functions, visual perception, and daily living activities due to the treatments were significantly different between the groups (p<.05). Conclusion : The results indicated that transcranial direct current stimulation and computerized cognitive rehabilitation therapy improved visual perception and daily living activities by increasing cognitive functions. Consequently, it was found that the simultaneous application of transcranial direct current stimulation in conjunction with a computerized cognitive rehabilitation program was an intervention method that could positively affect the visual perception, cognitive function, and daily living activities of dementia patients. Based on the results of this study, the study of arbitration protocols for demential will have to be more active.