• The Korean Journal of Food And Nutrition
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• v.11 no.2
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• pp.137-142
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• 1998

This study aims to examine appropriate kinds of pan oil to release a cake from the pan coated with polyether sulphone and to prove the change of acid value and peroxide value during the process of baking. The major factor effecting the rate of release of the cakes from the pan was properties of the oils rather than the additives. The releasing rate appeared higher as the iodine value was lower. The highest releasing rate was found in the sample, which was made of coconut oil plus 2% of wax, 2% of lecithin. The changes of acid value of the pan oil between the beginning and after baking was little different. In contrast, Peroxide value showed a great change after baking.

• Journal of the Korea Society of Computer and Information
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• v.19 no.2
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• pp.21-30
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• 2014

The use of induction motors has been recently increasing in a variety of industrial sites, and they play a significant role. This has motivated that many researchers have studied on developing fault detection and classification systems of induction motors in order to reduce economical damage caused by their faults. To early identify induction motor faults, this paper effectively estimates spectral envelopes of each induction motor fault by utilizing a linear prediction coding (LPC) analysis technique and an expectation maximization (EM) algorithm. Moreover, this paper classifies induction motor faults into their corresponding categories by calculating Mahalanobis distance using the estimated spectral envelopes and finding the minimum distance. Experimental results show that the proposed approach yields higher classification accuracies than the state-of-the-art conventional approach for both noiseless and noisy environments for identifying the induction motor faults.

• Korean Journal of Ichthyology
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• v.6 no.2
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• pp.206-221
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• 1994

Morphometrical data for diploid and induced triploid cherry salmon, Oncorhynchus masou were analyzed prior to the spawning season to compare their commercial values. The following traits were measured with the diploids and induced triploids : ungutted and gutted body weight; body length; dressing percentage; condition factor; gonad weight and gonad index; belly thickness; viscera weight; viscera index; body circumference at the pelvic, dorsal and anal fins; area of the cross sections at the pelvic and dorsal fins; two belly thickness traits measured on each cross section; total height, height and width of each cross section; three body shape traits; and nine cross section shape traits. Body length and body weight of diploids were larger than those of induced triploids and dressing percentage, gonad weight, gonad index, viscera index, and liver index were also larger in diploids. However, induced triploids showed higher values in one belly thickness trait and some section shapes than diploids. Differences in body traits were due to the sterility of induced triploids. Therefore, induced triploid cherry salmon appears to have greater potentials for the commercial values than their diploids.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.7
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• pp.1093-1101
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• 2013

This paper demonstrates that 'Qi Energy Healing' effects on elevation of capabilities in regards with the autonomic nervous system which prevents from the stress. Nineteen participants were assigned into 'Qi Energy Healing' and the 'Ordinary Relaxation' condition. Participants were examined to see the difference of frequency domain analysis, heart rate tachogram, physical resistance through the heart rate variability. The 'Qi Energy Healing' is significantly more likely to influence on reducing and diminishing the stress. 'Qi Energy Healing' treatment showed clear distinction on 6 fact. Our findings established the link between effectiveness of 'Qi Energy Healing' and the autonomic nervous system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.569-574
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• 2018

This paper proposes and implements a LoRa-based emergency exit guide system which can direct the optimal refuge path accounting for the real state of the fires. Each 4-way emergency exit guide sign presents a right direction through one of four LED signs toward the possible exit dynamically calculated by the shortest path algorithm. We constructed a simulation environment with 8 spots of the emergency exit guide signs and 2 exits, which can simulate variant cases of fire accidents, and showed that the proposed algorithm can presents the right guidance for each emergency exit guide sign. We also evaluated the performances of LoRa-based wireless communications using a self developed communication module in the various indoor and outdoor environments. The proposed system can be applied to small and medium sized buildings as well as larger ones in terms of cost efficiency, in which there's no needs to invest for the complex equipments except only sensors and emergency exit guide signs.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.6
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• pp.506-514
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• 2012

This paper represents a method for designing of path following Line-of-Sight(LOS) guidance law based on vehicle kinematics. In general, a LOS guidance law which is composed of gains and approach length as design parameters is designed by empirical or trial-and-error method. These approaches cannot guarantee a precision tracking performance of guidance law consistently. Also, the design parameters should be redesigned with variations of vehicle maneuverability and flight velocity. Based on a vehicle kinematics with its velocity, the proposed method for designing of parameters not only minimizes the number of design parameters, also has a reliable and consistent tracking performance using variable guidance gain changed in accordance with flight velocity. This is validated by nonlinear simulation with $1^{st}$ order attitude response dynamics and flight experiments with given linear and circular path.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.173-174
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• 2009

For container shipping company, fuel oil prise is a considerable expense. In the last 3 years, fuel oil prises have risen considerably. An increasing fuel oil prise in container shipping, in the short term, is only partially compensated through surcharges and will therefore affect earnings negatively. This paper deals with the impact of increasing fuel oil price and capital costs for vessels on the number of vessels on the Asia-Europe trade. As per result of 'H' carrier's operation in 2008, there were no cost difference between 8 and 9 vessels operation in case the fuel oil price is USD 169/tons while adopt USD 31,818 as fixed cost. We can expect that the fuel oil price will not be decreased under USD 200 $/Ton on the basis of current high oil price phenomenon. When the fuel oil price is over USD 200 $/ton, therefore, 9 vessels operation is more economic than 8 vessel operation even if the fixed cost is over USD 35,000.

• Journal of Digital Convergence
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• v.19 no.6
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• pp.53-60
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• 2021

The purpose of this study is to examine the terms and components related to the proper use of YouTube. The Delphi was conducted on 11 panels and the results are as follows. First, as a result of examining how the use of YouTube will change in the future, it is agreed that it will be used more actively and more diverse than now, but that maladaptive problems such as fake news and addictive use will occur. Second, the terminology of proper/improper use of Youtube was derived as 'adaptive use' and 'maladaptive use'. Third, as a result of the components of adaptive use of YouTube, it is that were 'Information and content sorting ability', 'Self-regulation ability', 'Information acquisition and delivery ability', 'Understanding motivation and desire to use', 'Time-of-use control ability', 'Consideration of ripple effect'. Finally, the implications and limitations of this study were discussed.

• Journal of Internet Computing and Services
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• v.23 no.3
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• pp.77-85
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• 2022

Unlike previous studies that focused on the diversity of YouTube content, this study tried to identify factors affecting users' satisfaction with the YouTube recommendation system. Specifically, by adding content preference suitability and privacy concerns to the technology acceptance model, we empirically analyzed how these variables affect user's satisfaction of the YouTube AI recommendation system. For this purpose, asurvey was conducted on college students in their 20s and 30s, and the main research results are as follows. First, in the respondents of this study, playfulness and usefulness, which are major variables of the technology acceptance model, appeared as significant factors affecting the satisfaction of the YouTube AI recommendation system, whereas the effect of ease to use was not found. Second, content preference suitability was found to affect the satisfaction with AI recommendation system, but privacy concerns did not affect the satisfaction with YouTube AI recommendation system. Based on these research results, the implications of the study and the directions for future studies were suggested.

• The Journal of the Korea Contents Association
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• v.21 no.11
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• pp.100-111
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• 2021

This study aims to lead the new discussion by looking at variables affecting the number of subscription channels and subscription satisfaction in the absence of academic discussion of users' YouTube subscriptions. To this end, we conducted an online survey and analyzed the factors affecting the number of subscription channels and subscription satisfaction of YouTube users. We conducted hierarchical regression to examine their subscription motivation with exploratory factor analysis and to examine the impact of subscription motivations and the intentionality of Youtubers and the usefulness of YouTube knowledge on the number of subscription channels and subscription satisfaction. The analysis results are as follows: First, YouTube's usage and convenience motivation have had a static impact on the number of subscription channels. Second, factors affecting subscription satisfaction have been shown to be convenience subscription motivation, communication with Youtubers motivation, and perceived usefulness of YouTube. The practical significance of this work is that it can be beneficial to platform and channel operators in the changing new media environment. Furthermore, it aims to expand the interaction research extensions between YouTuber and users in the new media environment.