• Korean Journal of Plant Taxonomy
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• v.49 no.4
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• pp.282-293
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• 2019

Broussonetia × kazinoki Siebold has long been utilized as a major component in the manufacturing of Korean traditional paper, hanji, and has been suggested as a hybrid species of B. papyrifera and B. monoica. By applying three molecular markers, chloroplast (cp) ndhF-rpl32 IGS, a nuclear ribosomal internal transcribed spacer, and the TOPO6 gene, the hybrid origin of B. × kazinoki is tested. As a result, B. × kazinoki in Korea is demonstrated to be a hybrid of B. monoica × B. papyrifera, most likely formed naturally in Korea. The cp haplotypes detected provided information about the origins and genetic diversity of the maternal lineage B. monoica and paternal lineage B. papyrifera. The two nuclear markers were supplemented to each other, leading to the discovery of introgression in Broussonetia.

• Elastomers and Composites
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• v.50 no.4
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• pp.251-257
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• 2015

The rubber seal is a part inserted into servo cylinder to keep the air pressure constant. In order for efficient movements of the servo cylinder, the frictional coefficient of the rubber seal needs to be minimized while the sealing is maintained. In this work the friction characteristics of rubber seal specimen are tested on metal plate at various conditions. The experimental conditions include roughness level, applied pressure, lubrication, and rubbing speed. The design of experiment approach is taken to assess the effect of each parameter. The nonlinear frictional response of the rubber is applied to the FEM model simulating the servo cylinder movement. The result demonstrates that precise optimization of the servo cylinder movement must be preceded by preliminary experiments coupled with the theory and FEM model.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.8
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• pp.671-675
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• 2002

The gas adsorption efficiency for various surfaces with three different characteristics has been reviewed. The dimethyl disulfide gas has been used to investigate characteristics of gas adsorption for different surface characteristics such as plasma treated, lacquer coated and untreated. Three different surfaces were evaluated in dry conditions initially and tested at wet surface conditions with spraying water to evaluate the gas adsorption efficiency which usually occurred at defrost cycles. The results show that the gas adsorption of the plasma treated sample has better performance than others. The lacquer coated and untreated samples showed the similar result, but the lacquer coated sample showed a slightly better performance.

• Journal of Sasang Constitutional Medicine
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• v.12 no.2
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• pp.104-122
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• 2000

This study aimed at figuring out the relations on Sasang Constitutions, and personality traits. Four hundred fourteen university students were tested by, QSCCII, NEO-Pl-R Korean version. It is analyzed by ANOVA and Duncan post hoc multiple comparisons with Spss 9.0. Following questions should be answered in this study. Are they any differences in the personality traits in accordance with Sasang Constitutions? The result of this study are follows; It is ascertained to find out personality trait by Sasang Constitutions. In other word, they have differences in personality traits(factor of N: Neuroticism, E: Extroversion, C: Conscientiousness) in accordances with Sasang constitutions by QSCCII.

• Journal of Plant Biology
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• v.16 no.1_2
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• pp.12-16
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• 1973

The inhibitory effect of Inula sesquiterpene lactones on the growth of Phaseolus vulgaris was tested and the abnormality of the stem organization caused by the lactones was also examined. The longitudinal growth of the young stem and the expansion of the young leaf were stopped by the application of the lactones. However, this inhibitory effect was appeared and strictly restricted within the treated area. So the young shoot was observed for possible bending as a result of the unilateral application of the lactones. When the application of the lactones into the medium, the growth of the plant was entirely repressed. However, the growth of shoot and re-initiation of root were started after the plant was transfered to the lactone free medium. And partial reversal of inhibition of the stem growth was achieved by the additions of gibberelline and the lactones.

• Archives of Pharmacal Research
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• v.2 no.1
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• pp.25-33
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• 1979

In order to find out nutritional effects of Korean edible mushrooms on the multiplication of tissue cells, the alcohol extracts and acid bydrolysates of eleven species of mushrooms were added to Earle's ESS. A comparison of the respective multiplications of HeLa cells in this solution and in control solution of TC=199. Yielded the following result: The alcohol extracts and acid hydrolysates of a Coprinus comatur, Agaricus campestris, Agaricus bisporus, Lentinus edodes, Tricholoma matsutake, Pleurotus ostretus, Ramaria botrytis and Pholiota nameko influenced favorably the maintenance of the normal form and monolayer of HeLa cells. The growth curves of HeLa cells in the cultures containing, respectively, the alcohol extracts and acid hydrolysates of these eight mushrooms showed that five species, i.e., Coprinus comatus, Agaricus compestris, Agaricus bisporus, Lentinus edodes and Tricholoma matsutake effected an excellent multiplication and that the other three species were less effective than those five species. As to the effects on the cell multiplication, no marked difference was observed between the alcohol extracts and the acid hydrolysates of the mushrooms tested.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.29B no.3
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• pp.25-34
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• 1992

This paper proposes a Self-Tuning control algorithm for tracking the reference trajectory by measuring the end-point of robot manipulator whose links are light and flexible, and the performance of it is tested through the computer simulation. As an object of system, a flexible robot manipulator with two-links is considered and an assumed mode shape method including gravity force is adopted to analyze the vibration modes for each links and dynamics equation is derived. The controller is designed as a combined form which consists of dynamic feedforward compensator and self-tuning feedback controller. The one supplies nominal torque and the other supplies variational torque to manipulator. Apart from the, K-incremental predictor is also proposed in order to eliminate the offset error. and it shows that the result of simulation adapted well to load change and rapid velocity.

• The Journal of Information Systems
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• v.8 no.1
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• pp.109-129
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• 1999

This study deals with the problem of information dissemination in a communication network, which is defined to be the process whereby a set of messages, generated by an originator, is transmitted to all the members within the network. Since this type of message generally includes control data to manage the network or global information that all members should know, it is to be required to transmit it to all the members as soon as possible. In this study, it is assumed that a member can either transmit or receive a message and an informed member can transmit it to only one of its neighbors at time. This type of transmission is called 'local broadcasting' Several schemes of call sequencing are designed for a general-type network with nonuniform edge transmission times, and then computer simulations are performed. Some heuristics for information dissemination are proposed and tested. For this, optimal call sequence in a tree-type network, sequencing theory and graph theory are applied. The result shows that call sequencing based on the shortest path tree is the most desirable.

• The Journal of Information Systems
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• v.15 no.1
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• pp.21-48
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• 2006

Recently the development of information technology and the emergence of electronic commerce have changed the model of purchase behavior in customers. This research aims to enhance the reliability of the result compared to the existing studies in internet shopping mall, and to find out the influence that logistics service quality elements has on customer satisfaction and that customers satisfaction has on the repurchase intention and word of mouth intention. To do so, prior researchs on the logistics service quality, customer satisfaction, repurchase intention and word of mouth intention was widely reviewed and the relationship between logistics service quality elements and customer satisfaction, and between customer satisfaction and repurchase intention and word of mouth intention were empirically tested. A total of 256 responses were received and analyzed from internet shopping mall. The analyses showed partial support for the affirmative effect of logistics service quality, customer satisfaction and post-purchasing behaviors in the internet shopping mall.

• Asia-Pacific Journal of Business
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• v.6 no.1
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• pp.45-57
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• 2015

The purpose of this research is to explore the relationships among service quality's five factors(i.e., tangibles, reliability, responsiveness, empathy, and assurance) and customer satisfaction. The study used convenience sampling and selected certain consumers who visited coffee shop in BeiJing, China. Total 300 questionnaires was distributed and 18 unsuitable data were excluded for data analysis. These data were tested using SPSS 21.0. The results of this study are summarized as follows. First, the result of the relationship between coffee shops'service quality and customer satisfaction reveals that two of 5 service quality factors (i.e., assurance and empathy) had a positive effect on customer satisfaction only, and other service quality factors (i.e., tangibles, reliability, and responsiveness) had no positive influence on customer satisfaction. Limitations and future research directions of the study were also discussed.