• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.65-68
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• 2002

Distributed Generators (DG) are rapidly increasing and most of them are interconnected with distribution network to supply power into the network. Therefore, DG may make significant impacts on distribution system operation. protection, and control with respect to the voltage regulation, voltage flicker, harmonics, fault current levels, the losses of the network, etc. These impacts would be demerits for both of DG and distribution networks. And the operation of DG may be influenced by the abnormal grid condition such as disturbances occurred in the neighboring distribution feeders as well as the feeder directly connected with DG. This paper describes the influence of fault occurred in the interconnected power network on the DG operation and the impact of DG on the network load during the interruptions of utility power.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.29 no.1
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• pp.116-124
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• 2006

In this paper, we proposed the SCM logistics roadmap in other that the 'Northeast Asian Distribution Hub' policy of the government can be realized more effectively. First, we analysed the requirements of SCM roadmap by examining the situation of Northeast Asian Distribution Hub roadmap, and developed 3 key dimensions of SCM roadmap-national, industrial, and technological dimensions. Second, we suggested integrated SCM on the 4-stage evolution axis, and suggested 9 strategies for realizing the roadmap. Finally, we discussed a cyclical improvement system for the suggested SCM roadmap to keep pace with the change of technical and industrial environment. We expect that the suggested SCM roadmap would be refined by the reaction of logistics groups and various opinions of experts, and become the foundation of execution strategies.

• Journal of the Korean Solar Energy Society
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• v.33 no.5
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• pp.76-81
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• 2013

In our former study, we proposed that the AC-Model might be applied to various conditions. And we also introduced the method for daylighting that it was possible to reduce discomfort glare and to improve visual impressions as the supplementary type and blind-control type on the compound lighting. The purpose of this study was to examine the relationship between physical elements and psychological evaluation of lighting space. The study was made using an full-size space, which were equipped with various luminaries. We investigated the relationship between subjective evaluation and characteristics of light distribution and showed the high correlation between the evaluation rating and luminance distribution over whole room.

• ETRI Journal
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• v.43 no.2
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• pp.184-196
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• 2021

The research domain of underwater communication has garnered much interest among researchers exploring underwater activities. The underwater environment differs from the terrestrial setting. Some of the main challenges in underwater communication are limited bandwidth, low data rate, propagation delay, and high bit error rate (BER). As such, this study assessed the underwater acoustic (UWA) aspect and explored the expression of error performance based on t-distribution noise. Filter orthogonal frequency-division multiplexing refers to a new waveform candidate that has been adopted in UWA, along with turbo and polar codes. The empirical outcomes demonstrated that the noise did not adhere to Gaussian distribution, whereas the simulation results revealed that the filter applied in orthogonal frequency-division multiplexing could significantly suppress out-of-band emission. Additionally, the performance of the turbo code was superior to that of the polar code by 2 dB at BER 10-3.

• International Journal of Industrial Entomology and Biomaterials
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• v.47 no.1
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• pp.25-33
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• 2023

Solitary bees, such as Osmia cornifrons, O. pedicornis, O. satoi, and O. taurus (Hymenoptera: Megachilidae), have the potential for cost-effective and sustainable pollination, necessitating a comprehensive understanding of their ecological traits to implement effective fertilization strategies for various crops. This study investigated the nesting rate of Osmia spp. in different regions and altitudes, using various trap types, and found that the highest nesting rate occurred at altitudes of 300-399 m a.s.l. and showing a preference for bamboo-type traps, with the Andong region having the highest nesting rate overall, indicating the influence of altitude, habitat area, and trap type on the density of Osmia spp. nests. The distribution and diversity of the four Osmia spp. in different regions and altitudes revealed variations in their occurrence, with O. pedicornis having the broadest distribution rate, particularly at altitudes above 300 m a.s.l.. The present study found significant differences between species in the cocoon masses of O. cornifrons, O. pedicornis, and O. taurus, with region and altitude influencing the masses of each species too.

• Journal of Distribution Science
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• v.22 no.7
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• pp.33-42
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• 2024

Purpose: The furniture industry has a huge potential for growth in Indonesia. Due to Indonesia's vast natural resources, furniture designers, makers, and retailers are given ease of access. The research analyzes the influence of service quality, promotion, product, and price on brand image and purchase intention in Indonesia's furniture distribution channels. Research design, data, and methodology: The variables used are service quality, promotion, product, price, brand image, and purchase intention. This research is cross-sectional research, which will be conducted among the furniture consumers in Indonesia, from the Instagram followers of a community as of 31 July 2023 with 837.5 thousand followers. The tools that will be used are surveys, conducted according to the sample size and processed using SMARTPLS 4 and the SEM-PLS model. Results: The findings urge that some variables have a significant influence on purchase intention directly but become less significant when influenced by brand image. Some variables can influence purchase intentions significantly through brand image, even if the certain variable did not have a significant influence on purchase intention directly. Conclusions: By knowing the significance of the variables towards brand image and purchase intention, ones with major influence can be implemented as a strategy to improve marketing in Indonesian furniture distributors.

• Journal of Distribution Science
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• v.22 no.7
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• pp.13-22
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• 2024

Purpose: This research is a quantitative study aimed at determining the influence of brand experience and brand image on brand equity through brand loyalty in the distribution in Coworking Space industry. Research design, data and methodology: The analytical method employed in this research is Partial Least Squares Structural Equation Modeling (PLS-SEM). The study utilizes a quantitative approach, with data collected through online questionnaires distributed via Google Forms among Coworking Space users. A total of 68 respondents represent the research population.. The data was analyzed using PLS-SEM to examine the relationships between the variables under investigation. Results: The research findings indicate that brand experience significantly affects both brand loyalty and brand equity. Similarly, brand image significantly influences both brand loyalty and brand equity. Additionally, brand loyalty has a significant impact on brand equity Conclusions: The research findings indicate that brand experience has a significant effect on brand loyalty and brand equity. Brand image significantly affects both brand loyalty and brand equity.Additionally, brand loyalty significantly influences brand equity.

• Nuclear Engineering and Technology
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• v.56 no.10
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• pp.4056-4061
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• 2024

The selection of appropriate transport parameters of radionuclides is of utmost importance in the safety assessment of radioactive waste disposal sites. Both batch and column methods are widely performed to determine the transport parameters of radionuclides through soil layers. In this paper, the distribution coefficients K_d of Co ions in sandy mixtures containing soil samples taken from Anarak near-surface repository (Iran) were determined by batch and 3 different column methods namely, breakthrough curve, thin-section, and gamma spectroscopy methods. The distribution coefficients K_d of the mixture was obtained as 160 L kg^-1 for the batch method, 23 L kg^-1, 19 L kg^-1, and 18 L kg^-1 for the breakthrough curve, the thin-section, and the gamma spectroscopy methods, respectively. These results emphasize proper selection of transport data for using in the safety assessment programs.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.309-315
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• 1998

Process Capability can be expressed with a process index which indicates the incapability of a process to meet its specifications. This index is regarded as a process capability index(PCI) or more precisely as a process incapability index(PII). It is obtained from a simple transformation of a PCI. Greenwich and Jahr-Schaffrath(1995) considered the PII $C_{pp}$ which could be obtained from the transformation to the PCI, $C_{pm}$, and they provided the asymptotic distribution for $C_{pp}$ which was useful unless the process characteristic was normally distributed. However, some statistical inferences based on the asymptotic distribution need a large sample size. There are some processes which process engineers could not help obtaining sufficiently a large sample size. Thus, we have derived its corresponding bootstrap asymptotic distribution since bootstrapping would be a helpful technique for the PII, $C_{pp}$ which was nonparametric or free from assumptions of the distribution of the characteristic X. Moreover, we have constructed six bootstrap confidence intervals used in reducing bias of estimations based on the bootstrap asymptotic distribution and simulated their performances for $C_{pp}$,

• Journal of Distribution Science
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• v.12 no.7
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• pp.103-110
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• 2014

Purpose - This study attempts to examine the new concept of mobile internet users' lifestyles through empirical analyses based on the i-VALS concept study that had classified the VALS program, among others, aiming at internet users. Research design, data, and methodology - A total of 300 questionnaire copies were distributed, of which 273 were collected; only 244 were used for the empirical study after excluding some inappropriate or unusable ones. To analyze the data collected, the SPSS/WIN 19.0 statistical package was used, and the lifestyles of mobile internet users were reclassified after analyzing the reliability and validity of the responses. Results - The study involved the empirical analyses of the new concept of the mobile internet users' lifestyles based on the i-VALS concept study, of which the subjects were internet users. Conclusion - It is possible to provide enterprises with more systematic and objective fundamental data based on the characteristics of mobile internet users' lifestyles, to help enterprises with their establishment of market segmentation strategies for promoting mobile shopping in the future.