• 산업융합연구
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• 제21권10호
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• pp.81-89
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• 2023

본 연구는 간호대학생의 학업스트레스와 충동구매 경향성 간의 관계에서 자기통제력의 매개효과를 설명하기 위한 서술적 조사연구이다. 대상자는 2022년 3월 24일부터 4월 5일까지, 광주광역시와 J시 2개 대학의 간호대학생 145명을 편의 표집하였다. 자료분석은 SPSS WIN 23.0을 활용하여 학업스트레스, 자기통제력과 충동구매 경향성 간의 상관성은 Pearson's Correlation Coefficient, 학업스트레스와 충동구매 경향성 간의 관계에서 자기통제력의 매개효과는 Baron과 Kenny의 3단계 검증절차에 의거하여 매개효과 다중회귀분석과 Sobel test로 통계적 유의성 검증을 실시하였다. 학업스트레스와 충동구매 경향성에서 자기통제력이 매개효과가 있는지 살펴본 결과 첫째, 학업스트레스가 충동구매 경향성에 유의한 영향을 미쳤다. 둘째, 자기통제력은 학업스트레스와 충동구매 경향성 간의 관계에서 부분매개효과를 나타냈다. Sobel test를 이용하여 매개효과를 검증한 결과 통계적으로 유의하였다(z=-2.69, p<.001). 간호대학생의 학업스트레스와 충동구매 경향성을 감소시키기 위해서는 부분매개효과가 있는 자기통제력을 고취시킬 수 있는 교과·비교과 교육중재 프로그램 개발의 기초자료를 제공하는데 의의를 갖는다.

• 한국콘텐츠학회논문지
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• 제13권9호
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• pp.178-192
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• 2013

본 연구는 노년기의 부부갈등요인(의사소통, 가정생활, 공격행동, 경제갈등)과 생태체계요인(개인, 가족, 사회)이 황혼이혼(이혼생각, 이혼시도)과 범죄충동(폭력, 자기중심성, 가출)에 미치는 영향을 파악하고자 하였다. 연구 대상으로는 수도권에 거주하는 55세 이상의 기혼 노인 350명을 대상으로 하였다. 그 중 결측치를 제외한 332부를 최종 분석하였다. 자료 분석은 SPSS 18.0 프로그램을 이용하여 빈도분석, 요인분석, 신뢰도 분석 및 t-test, ANOVA, 위계적 회귀분석과 Scheffe test로 분석하였고 연구결과는 다음과 같다. 첫째, 부부갈등과 생태체계가 가정생활에서의 갈등이나 폭력적인 공격행동, 의사소통 및 경제적인 부분에서의 갈등이 심할수록 황혼이혼에 미치는 영향이 높아진 것으로 분석되었다. 둘째, 부부갈등과 생태체계가 가정생활에서의 갈등과 배우자의 공격적인 행동으로 인한 갈등, 경제적인 갈등, 자기중심성충동이 높을수록 범죄충동에 미치는 영향이 높아진 것으로 분석되었다. 셋째, 인구사회적 특성에 따른 부부갈등, 생태체계, 황혼이혼 및 범죄충동 차이는 모든 분야(성별, 학력, 직업, 자녀동거여부, 종교, 건강상태, 월평균 소득)에서 통계적으로 유의한 차이가 있었다.

• 한국추진공학회지
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• 제18권1호
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• pp.42-49
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• 2014

설계성능이 검증된 70 N급 하이드라진 추력기에 대한 성능평가 시험이 수행되었다. 각각의 개발모델 추력기는 추력실 직경 변화에 따라 펄스모드로 연소시험이 수행되었으며, 비추력, 임펄스 비트 및 특성속도 등의 성능변수로 평가되었다. 추력실 직경의 증가와 감소에 따라 비추력과 특성속도가 감소하였으며, 성능평가 결과 표준모델의 성능특성이 가장 우수한 것으로 확인되었다.

• 경영과학
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• 제25권3호
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• pp.13-26
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• 2008

We investigate the effect of government and public sector R&D Investment at IT Industry on the amount of Production, export and nongovernment R&D Investment at IT Industry. We, firstly, examine the stationarity of each variable by the unit root t-test and perform the co-integration test for the pairs of variables. We use YECM(Vector Error Correction Model) according to the results of co-integration test for the examination of Granger-causality between variables. It is found that there exist an Granger-causality between public sector R&D Investment and nongovernment R&D investment and also between public sector R&D Investment and export. Secondly, we analyze the impulse response of government and public sector R&D Investment at IT Industry on the amount of production, export and nongovernment R&D investment at IT Industry based on VECM model. It is found that the response of the amount of production is highest at 3th period and is lowest at 8th period and that of export shows similar pattern.

• 항공우주시스템공학회지
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• 제11권1호
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• pp.8-13
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• 2017

한국형 발사체 3단 엔진용 터보펌프 터빈에 관해 성능 시험을 수행하여 성능 특성 결과를 분석하였다. 터빈은 초음속 충동형 방식의 단단 형태이며, 노즐은 시동 노즐 1개와 정상 운전용 노즐 4개로 이루어졌으며, 부분 분사 형태로 되어 있다. 한국항공우주연구원 내의 고압 공기 터빈 상사 시험 설비를 이용하여 상사 시험을 수행하였다. 시험 결과 효율은 회전수 변화에 크게 변화하며, 이에 반해 압력비 변화에는 다소 작게 변화하는 초음속 충동형 터빈의 일반적인 특성을 보이고 있다.

• 수산경영론집
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• 제46권1호
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• pp.93-107
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• 2015

This study aims to analyze causalities among Hairtail prices by distribution channel using a vector autoregressive model. This study applies unit-root test for stability of data, uses Granger causality test to know interaction among Hairtail Prices by distribution channel, and employes the vector autoregressive model to estimate statistical impacts among t-2 period variables used in model. Analyzing results of this study are as follows. First, ADF, PP, and KPSS tests show that the change rate of Hairtail price by distribution channel differentiated by logarithm is stable. Second, a Granger causality test presents that the producer price of Hairtail leads the wholesale price and then the wholesale price leads the consumer price. Third, the vector autoregressive model suggests that the change rate of Hairtail producer price of t-2 period variables statistically, significantly impacts change rates of own, wholesale, and consumer prices at current period. Fourth, the impulse response analysis indicates that impulse responses of the structural shocks with a respectively distribution channel of the Hairtail prices are relatively more powerful in own distribution channel than in other distribution channels. Fifth, a forecast error variance decomposition of the Hairtail prices points out that the own price has relatively more powerful influence than other prices.

• Journal of Electrical Engineering and Technology
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• 제5권2호
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• pp.329-336
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• 2010

The paper describes the electrical and optical properties of underwater discharges in highly inhomogeneous electric fields caused by 1.2/50 ${\mu}s$ impulse voltages as functions of the polarity and amplitude of the applied voltage, and various water conductivities. The electric fields are formed by a point-to-plane electrode system. The formation of air bubbles is associated with a thermal process of the water located at the tip of the needle electrode, and streamer coronas can be initiated in the air bubbles and propagated through the test gap with stepped leaders. The fastest streamer channel experiences the final jump across the test gap. The negative streamer channels not only have more branches but are also more widely spread out than the positive streamer channels. The propagation velocity of the positive streamer is much faster than that of the negative one and, in fact, both these velocities are independent of the water conductivity; in addition the time-lag to breakdown is insensitive to water conductivity. The higher the water conductivity the larger the pre-breakdown energy, therefore, the ionic currents do not contribute to the initiation and propagation of the underwater discharges in the test conditions considered.

• 대한청각학회지
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• 제25권1호
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• pp.36-42
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• 2021

Background and Objectives: Globally, the human immunodeficiency virus (HIV) is responsible for one of the most serious pandemics to date. The vulnerability of the vestibular system in individuals with HIV has been confirmed, and central vestibular impairments have been frequently reported. However, there are disagreements on the impact of HIV on peripheral vestibular function. Thus, the current study aimed to determine the prevalence of peripheral vestibular impairment, specifically related to the semi-circular canals (SCCs), in HIV-positive individuals receiving antiretroviral (ARV) treatment. Subjects and Methods: A total of 92 adults between the ages of 18 and 50 years (divided into two groups) participated in the study. The first group comprised HIV-positive individuals receiving ARV treatment (n₁=60), and the second group comprised HIV-negative participants (n₂=32). The video head impulse test was used to conduct the head impulse paradigm (HIMP). Results: Bilateral normal HIMP results were obtained in 95% of the HIV-positive participants and all HIV-negative participants. The gain of the left posterior SCCs was significantly lower in the HIV-positive group, while the gains of all other canals between the two groups were comparable. Conclusions: The prevalence of peripheral vestibular impairment in the HIV-positive group was not significantly different from that of the HIV-negative group. The reduced prevalence in the current study may be attributed to participant characteristics, the test battery employed, and the central compensation of the vestibular dysfunctions at the later stages of infection.

• Journal of Audiology & Otology
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• 제25권1호
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• pp.36-42
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• 2021

Background and Objectives: Globally, the human immunodeficiency virus (HIV) is responsible for one of the most serious pandemics to date. The vulnerability of the vestibular system in individuals with HIV has been confirmed, and central vestibular impairments have been frequently reported. However, there are disagreements on the impact of HIV on peripheral vestibular function. Thus, the current study aimed to determine the prevalence of peripheral vestibular impairment, specifically related to the semi-circular canals (SCCs), in HIV-positive individuals receiving antiretroviral (ARV) treatment. Subjects and Methods: A total of 92 adults between the ages of 18 and 50 years (divided into two groups) participated in the study. The first group comprised HIV-positive individuals receiving ARV treatment (n₁=60), and the second group comprised HIV-negative participants (n₂=32). The video head impulse test was used to conduct the head impulse paradigm (HIMP). Results: Bilateral normal HIMP results were obtained in 95% of the HIV-positive participants and all HIV-negative participants. The gain of the left posterior SCCs was significantly lower in the HIV-positive group, while the gains of all other canals between the two groups were comparable. Conclusions: The prevalence of peripheral vestibular impairment in the HIV-positive group was not significantly different from that of the HIV-negative group. The reduced prevalence in the current study may be attributed to participant characteristics, the test battery employed, and the central compensation of the vestibular dysfunctions at the later stages of infection.

• 간호행정학회지
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• 제19권5호
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• pp.658-667
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• 2013

Purpose: The study was undertaken to investigate effects of decision making competency, nursing professionalism and job satisfaction on turnover impulse, and identify factors contributing to turnover impulse among nurses. Methods: The study was a descriptive study with 231 nurses from 4 general tertiary hospitals participating. Data were collected during March, 2013 using a structured self-report questionnaire. Decision making competency, nursing professionalism, and job satisfaction were measured with validated instruments, and turnover impulse was measured with one question using a 5-point Likert scale. Data were analyzed using descriptive statistics, t-test, one-way ANOVA, Pearson correlation coefficients and multiple regression. Results: The significant predictors of turnover impulse among nurses were professionalism (${\beta}$=-0.18, p=.015) and job satisfaction (${\beta}$=-0.18, p=.009). These variables explained 12% of the variance in turnover impulse among nurses. Conclusion: The results indicate that nursing managers need to put efforts in improving nurses' job satisfaction and to develop plans to increase nursing professionalism in order to reduce nurses' turnover impulse.