• 자동차안전학회지
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• 제4권2호
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• pp.5-10
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• 2012

Whiplash is the most frequent injury among occupants in low speed rear-end car collision. The aim of this paper is to analyze thecorrelation between influence parameters of head restraints and whiplash injury criteria.In this paper, DFSS (Design for Six Sigma) method is used for optimum design of head restrains. Four control factors of head restraints have selected by function matrix method. The effects of the control factors have been experimentally evaluated by using a sled pulse from 16km/h relative velocity which is suggested by KNCAP (Korean New Car Assessment Program). In order to reduce the noise factors of dynamic tests, whiplash tests were repeated twice. By using DFSS, the correlation between control factors and injury criteria has been comprehended.

• 대한기계학회논문집
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• 제14권6호
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• pp.1446-1454
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• 1990

본 연구에서는 다간극기구의 간극의 영향을 제거하기 위해 코일스프링의 사용 을 대안으로 제시하였다.

• 한국항해학회지
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• 제20권3호
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• pp.85-95
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• 1996

In the velocimeter, the ultrasonic pulse signal is used for measuring the profile velocity of moving targets distributed in space because of the merits of its high distance resolution and harmless affect to the human body. The velocity reading in conventional ultrasonic pulsed velocimeter depends on the wave pattern reflecting the spatial distribution of scatters and includes observational error due to the signal processing of analyzing pulse signal. In this paper, we evaluate an influence of the received waveform of pulsed signal on the velocity information by setting a model. Subsequently, in order to improve the distance resolution and to obtain precise velocity information without the influence of the spatial distribution of scatterers, we propose a new method for the analysis of Doppler pulsed signal, in which the pulsed signal is transformed into a phase function with local data. Finally, it is confirmed that the performance of the velocimeter is more improved in the proposed method than in the conventional one.

• EDISON SW 활용 경진대회 논문집
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• 제6회(2017년)
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• pp.457-462
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• 2017

A linear carbon chain with pure sp hybridization has been intensively studied for the application of its intrinsic electrical properties to electronic devices. Owing to the high chemical reactivity derived from its unsaturated bond, encapsulation by carbon nanotubes (CNT) is provided as a promising method to stabilize the geometry of the linear carbon chain. Although the influence of CNT on the carbon chain has extensively been studied in terms of both electronic structure and geometries, the electron transport properties has not been discussed yet. In this regard, we provide the systematic atomic-scale analyses of the properties of the linear carbon chain within CNT based on a computational approach combining density-functional theory (DFT) and matrix green function (MGF) method. Based on the DFT calculations, the influence of CNT on electronic structures of the linear carbon chain is provided as well as its electrical origin. Via MGF calculations, we also identify the electron transport properties of the carbon chain - CNT complex.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 1999년도 춘계 학술대회논문집
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• pp.171-176
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• 1999

In the present paper, three types of the flow solvers were used to investigate the influence on the airfoil shape optimization. The adopted equations, i.e., Euler , thin layer Navier- Stokes and full Navier-Stokes ones, are solved using implicit LU-ADI decomposition scheme. The feasible direction algorithm with the sinusoidal function was used as an optimization algorithm. The present numerical method was applied to the drag minimization problems under the initial shape of NACA0012 airfoils.

• PNF and Movement
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• 제3권1호
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• pp.17-26
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• 2005

Objectives : The purpose of this study is to identify influence that PNF method have an effect in function restoration of the impaired patients of central nervous system. Methods : The data were collected by 15 adult stroke patients. The treatment was based on proprioceptive neuromuscular facilitation techniques. Temporal and spatial parameters of gait were analysed for using the computerized GAITRite system. Results : In the comparison of functional ambulation profile(FAP) before and after experiment, the FAP was significantly increased in the PNF method. The gait velocity, cadence and single support time asymmetry ratio was significantly increased in the PNF method. The Motor Assessment Scale was significantly increased in the PNF method. Conclusions : Based on these results, it is concluded that the forced PNF method for 6 weeks can be improve the temporal-spatial gait parameters including FAP in hemiplegic patients. Therefore, the forced PNF method is useful to improve the function restoration in hemiplegic patients. Further study should be done to analyze the effects of intervention duration of treatment, optimal time to apply the treatment in more long peried.

• Current Optics and Photonics
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• 제4권6호
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• pp.500-508
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• 2020

The rifling angle of artillery is an important parameter, and its determination plays a key role in the stability, hit rate, accuracy and service life of artillery. In this study, we propose an optical measurement method for the rifling angle based on angle error correction. The method is based on the principle of geometrical optics imaging, where the rifling on the inner wall of the artillery barrel is imaged on a CCD camera target surface by an optical system. When the measurement system moves in the barrel, the rifling image rotates accordingly. According to the relationship between the rotation angle of the rifling image and the travel distance of the measurement system, different types of rifling equations are established. Solving equations of the rifling angle are deduced according to the definition of the rifling angle. Furthermore, we added an angle error correction function to the method that is based on the theory of dynamic optics. This function can measure and correct the angle error caused by the posture change of the measurement system. Thus, the rifling angle measurement accuracy is effectively improved. Finally, we simulated and analyzed the influence of parameter changes of the measurement system on rifling angle measurement accuracy. The simulation results show that the rifling angle measurement method has high measurement accuracy, and the method can be applied to different types of rifling angle measurements. The method provides the theoretical basis for the development of a high-precision rifling measurement system in the future.

• 한국간호교육학회지
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• 제16권1호
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• pp.43-50
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• 2010

Purpose: This study was conducted to identify the effect of family function and self-efficacy on suicidal ideation in university students. Method: The study was designed as a descriptive survey study. Data was collected using a structured questionnaire which included general characteristics, measures of family function, self-efficacy and suicidal ideation. Data collection was done between April 1 and April 30, 2009 with 569 university students. Data was analyzed using descriptive statistics, ANOVA, and Pearson's correlation coefficients. Result: The score of family function showed a significantly negative correlation with suicidal ideation. The score of self-efficacy also showed a significantly negative correlation with suicidal ideation. Family function in university students was significantly influenced by gender. Family cohesion was significantly influenced by religion. Self-efficacy in university students was significantly influenced by gender and age. Suicidal ideation was significantly influenced by religion. Conclusion: The findings suggest that family function and self-efficacy influence suicidal ideation. A strategy for improving family function and self-efficacy should be identified to decrease suicidal ideation.

• 재활간호학회지
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• 제20권1호
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• pp.33-41
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• 2017

Purpose: This study is a descriptive study to analyze the relationship between the cognitive function, body image and pain, and the influencing factors on the daily life performance of brain injured patients. Methods: The study subjects were 119 inpatients with brain injury who gave informed consent. The activities of daily living (ADLs), cognitive function, pain and body image were measured by Modified Barthel Index (K-MBI), K-MMSE (Mini-Mental State Examination), Visual Analog Scale (VAS), Semantic Differential Method (SDM), respectively. Results: ADLs was significantly associated with body image, cognitive function, and pain. Multiple regression analysis showed that paralysis, consciousness, cognitive function, and pain were significant factors influencing ADLs. Overall, approximately 48% of total variability in the ADLs could be explained by the 4 variables ($R^2=.477$, p<.001). Conclusion: To improve ADLs of brain injury patients, a deeper understanding of paralysis, consciousness, cognitive function, and pain of patients is required and active nursing invention should be conducted.

• 종양간호연구
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• 제9권1호
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• pp.7-14
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• 2009

Purpose: This study was to analyze the level of quality of life and sexual function of Hematopoietic Stem Cell Transplantation (HSCT) recipients. Method: Participants included 38 recipients of HSCT, attending hospital outpatient department. Data were collected using the quality of life scale and the sexual function scale. Data were analyzed using Descriptive statistics, t-test, ANOVA, Sheff$\acute{e}$ test, and Kruskal-Wallis test. Results: The high score of quality of life was found in the participants with the 30s age (p=0.030), being employed (p=0.001), not having admission history after HSCT (p=0.012), and not having medication (p=0.017). The sexual function was significantly influenced by employment status (p=0.001) and irradiation therapy (p=0.043). There was a significant correlation between the quality of life and the sexual function (r=0.45, p=0.004). Conclusion: The sexual function have influence on the quality of life so that it is required to develop nursing interventions for sexual function to improve the quality of life of HSCT recipients.