• 한국공간구조학회논문집
• /
• 제13권4호
• /
• pp.57-66
• /
• 2013

Spatial structures have the different dynamic characteristics from general rahmen structures. Therefore, it is necessary to accurately analyze dynamic characteristics and seismic response for seismic design of spatial structure. Keel arch structure is used as an example structure because it has primary characteristics of spatial structures. In case of spatial structures with different ground condition and time lag, multiple support excitation may be subjected to supports of a keel arch structure. In this study, the response of the keel arch structure under multiple support excitation and with time lag are analyzed by means of the pseudo excitation method. Pseudo excitation method shows that the structural response is divided into two parts, ground displacement and structural dynamic response due to ground motion excitation. It is known that the seismic responses of spatial structure under multiple support excitation are different from those of spatial structure under simple excitation. And the seismic response of spatial structure with time lag are different from those of spatial structure without time lag. Therefore, it has to be necessary to analyze the seismic response of spatial structure under multiple support excitation and time lag because the spatial structure supports may be different and very long span. It is shown that the seismic response of spatial structure under multiple support seismic excitation are different from those of spatial structure under unique excitation.

• Fibers and Polymers
• /
• 제7권4호
• /
• pp.404-413
• /
• 2006

This study examines multiple quality optimization of the injection molding for Polyether Ether Ketone (PEEK). It also looks into the dimensional deviation and strength of screws that are reduced and improved for the molding quality, respectively. This study applies the Taguchi method to cut down on the number of experiments and combines grey relational analysis to determine the optimal processing parameters for multiple quality characteristics. The quality characteristics of this experiment are the screws' outer diameter, tensile strength and twisting strength. First, one should determine the processing parameters that may affect the injection molding with the $L_{18}(2^1{\times}3^7)$ orthogonal, including mold temperature, pre-plasticity amount, injection pressure, injection speed, screw speed, packing pressure, packing time and cooling time. Then, the grey relational analysis, whose response table and response graph indicate the optimum processing parameters for multiple quality characteristics, is applied to resolve this drawback. The Taguchi method only takes a single quality characteristic into consideration. Finally, a processing parameter prediction system is established by using the back-propagation neural network. The percentage errors all fall within 2%, between the predicted values and the target values. This reveals that the prediction system established in this study produces excellent results.

• 한국의상디자인학회지
• /
• 제23권2호
• /
• pp.115-132
• /
• 2021

The purpose of this study was to suggest multiple directions of fashion design by producing differentiated athleisure fashion designs with functional materials based on existing sportswear. A design utilizing handcraft skill was developed by applying the design characteristics of Laszlo Moholy-Nagy's paintings. With respect to the study methods, the background of Laszlo Moholy-Nagy's paintings were analyzed and their historical background was investigated by employing previous studies and literature review. The design characteristics were classified by issue and time-period. The results are as follows; First, the feasibility of creative artwork expression was found by pursuing collaboration with artwork and fashion by applying the motives of the fashion with the characteristics by the times, lines, forms, colors, and overlapping in Moholy-Nagy's paintings. Second, athleisure fashion, which can mix-match with casual wear, was found to enhance not only creativity but also add value by applying design, which added multiple handcraft elements, as well as characteristics of functionality, aesthetics, practicality, appealability, ostentation, activity, and dynamism. Third, potential harmony was found with achromatic and chromatic colors that can express more dynamic and active images. Based on the study results, further studies are anticipated using multiple paintings.

• 대한간호학회지
• /
• 제29권6호
• /
• pp.1434-1444
• /
• 1999

The purpose of this study was to investigate the influence of job characteristics on the nurses' the moderating effect of locus of control on the job satisfaction and organizational commitment and relationship between job characteristics and attitude. The sample for this study consisted of 594 nurses from 8 university hospitals. Factor analysis, Cronbach's alpha analysis, multiple regression analysis and hierarchical multiple regression analysis were used for the statistical methods. The results of this study were found that (1) autonomy among 5 core job characteristics showed positive influence on job satisfaction, (2) task significance and autonomy among 5 core job characteristics had positive influence on organizational commitment, (3) the internals of locus of control moderated the effect of job characteristics on nurses' job satisfaction, and (4) internals and externals of locus of control moderated the effect of job characteristics on nurses' organizational commitment.

• Bulletin of the Korean Chemical Society
• /
• 제20권6호
• /
• pp.705-711
• /
• 1999

The laser-induced transient grating method is applied to study the dynamics of the nematic MBBA film. The nanosecond laser pulses of 355 nm are used to make the transient grating and the cw He-Ne laser of 633 nm is used to probe the dynamics. Strong multiple order diffractions are observed at high nematic temperatures. The reordering process induced by the phototransformed state, which is the locally melted state from the nematic sample, is attributed to the main origin of the multiple order diffractions from the nematic MBBA. The characteristics of the multiple order gratings are discussed with the grating profiles simulated from the multiple diffraction signals.

• 한국국방경영분석학회지
• /
• 제5권2호
• /
• pp.27-38
• /
• 1979

This method explores a method of aggregating the measures of effectiveness of a weapon system from its characteristics. With this method, the constant sum method and multiple regression are used to develop a functional relationship between system effectiveness and system characteristics. As an example, a study of a tank weapon system was${\cdot}$conducted with data from the U.S. Army Armor School. It was concluded that the aggregation method is feasible, and that for the tank system studied, the reciprocals of system characteristics give a good estimating equation for measuring tank system effectiveness.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제8권1호
• /
• pp.145-164
• /
• 2014

Network virtualization provides a promising tool to allow multiple heterogeneous virtual networks to run on a shared substrate network simultaneously. A long-standing challenge in network virtualization is the Virtual Network Embedding (VNE) problem: how to embed virtual networks onto specific physical nodes and links in the substrate network effectively. Recent research presents several heuristic algorithms that only consider single topological attribute of networks, which may lead to decreased utilization of resources. In this paper, we introduce six complementary characteristics that reflect different topological attributes, and propose three topology-aware VNE algorithms by leveraging the respective advantages of different characteristics. In addition, a new KS-core decomposition algorithm based on two characteristics is devised to better disentangle the hierarchical topological structure of virtual networks. Due to the overall consideration of topological attributes of substrate and virtual networks by using multiple characteristics, our study better coordinates node and link embedding. Extensive simulations demonstrate that our proposed algorithms improve the long-term average revenue, acceptance ratio, and revenue/cost ratio compared to previous algorithms.

• 한국컴퓨터정보학회논문지
• /
• 제13권4호
• /
• pp.31-37
• /
• 2008

본 논문은 다중 그리드 사이트에서 어플리케이션의 특성을 고려한 동적 작업 재배치 정책을 제안한다. 이 정책은 다중 그리드 사이트에서 수행할 어플리케이션의 특성에 따라 계산 집약 어플리케이션 또는 네트워크 집약 어플리케이션으로 분류한다. 또한, 네트워크 집약 어플리케이션을 단일 사이트에 할당하여 사이트간의 통신을 제거함으로써 전체 작업실행시간을 단축한다. 하지만 단일 사이트에 네트워크 집약 어플리케이션을 수행할 유휴 노드 수가 존재하지 않으면 네트워크 지연을 최소화하도록 다중 사이트에 먼저 할당한다. 그리고 단일 사이트에 네트워크집약 어플리케이션을 수행할 수 있는 유휴 노드의 수가 생성되면 다중 사이트에서 수행중인 어플리케이션을 단일사이트로 재배치하여 전체 작업실행시간을 단축한다. 본 논문에서는 시뮬레이션을 통하여 제안한 동적 적업 재배치정책이 기존 스케줄링 정책에 비해 데이터 그리드의 성능 향상 면에서 우수함을 보인다.

• ETRI Journal
• /
• 제46권3호
• /
• pp.432-445
• /
• 2024

This paper demonstrates improved throughput and energy efficiency of wireless communications by exploiting nonorthogonal multiple access (NOMA), multiple input-multiple output (MIMO), and radio frequency energy harvesting (EH) technologies. To assess the performance of NOMA MIMO communications with EH (MMe), we consider the nonlinear characteristics of EH devices and propose explicit expressions for throughput and outage probability. Based on our results, the system performance is significantly mitigated by EH nonlinearity and is considerably improved by increasing the number of antennas. Additionally, by appropriately adjusting the system parameters, our NOMA MMe innovation can avert complete outages while optimizing system performance. Moreover, the results demonstrate the superiority of the NOMA MMe over its orthogonal multiple access MMe counterparts.

• 보건교육건강증진학회지
• /
• 제29권2호
• /
• pp.93-105
• /
• 2012

Objectives: The objective of the study was to examine the clustering patterns and correlates of multiple health behaviors (MHBs) in middle-aged Koreans with metabolic syndrome (MetS). Methods: Data on sociodemographics, clinical characteristics, health behaviors (vegetable intake, physical activity, cigarette smoking, and alcohol consumption), and psychological characteristics were collected by a self-reported survey and medical examination from 331 individuals with MetS. Clustering of MHBs was examined by measuring 1) the ratios of observed and expected prevalence of MHBs, and 2) the prevalence odds ratios. A binomial logistic regression were conducted. Results: Men were more likely than women to engage in multiple unhealthy behaviors. Clustering of smoking and heavy drinking was exhibited in the participants. Women with high vegetable intake were more likely to be physically inactive, and those with inadequate vegetable intake were more likely to be physically active. Those with lower self-regulation were more likely to engage in unhealthy behaviors. Conclusions: The findings support the multiple health behavior approach as opposed to the individual health behavior approach. Emphasis of self-regulation is necessary in developing multiple behavior intervention for individuals with MetS.