• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.3
• /
• pp.292-297
• /
• 2016

This paper presents a navigation problem for an autonomous mobile robot in an unknown environment. The environment contains various types of obstacles and is completely unknown to the robot. Therefore, all of the surrounding information must be detected by the robot's proximity sensors. A navigation method was developed based on a fuzzy inference system to guide the robot to move along a collision-free path and reach the goal position quickly. The obstacles are assumed to be static, and both regular and irregular types of obstacles were investigated. A wall following method is also proposed for a special environment that contains a labyrinth or sharp U-valley obstacles. Simulation results demonstrate that the proposed method has great potential for this navigation problem.

• The Journal of the Korea Contents Association
• /
• v.7 no.6
• /
• pp.135-143
• /
• 2007

Dir.Guilermo del Toro, born in Mexico and started his career as a special make up artist, has been valued as one of most creative directors over the world since he went through hardship to adjust himself in Hollywood system. Del Toro as director has had interesting development in the boundary between Hollywood system' demand and creator(auteur)'s self-consciousness from the his first film to currently . His works reflect his Catholic view of the world. Del Toro like to have the variation of convention on his works from the classics to modern films in order to approach audience easily. He adopts plots and symbols from Bible, mythology and ancient tragedy as same reason. After then, Del Toro constructs his creativity on it. Thus, his works are consist of combination between universality and creativity. This is the reason why His works are making success both criticism and box office hit.

• Journal of Convergence for Information Technology
• /
• v.10 no.7
• /
• pp.116-121
• /
• 2020

This study was undertaken to investigate the influence and related mechanisms that have yet to be clearly demonstrated of Lithospermum erythrorhizon derived-naphthoquinone (shikonin) on the anxiety, insomnia, depression in rats. We hypothesized that naphthoquinone, the primary ingredient of Lithospermum erythrorhizon, plays a role in the modulation of insomnia evoked by stress, depression evoked by forced swimming or anxiety evoked by elevated plus maze. Male ICR (Institute of Cancer Research) mice were used and the immobility or swimming time, the duration of sleep, the duration and entry frequency into open arms were measured and recorded. The administration of naphthoquinone (10, 30 and 100 mg/kg) potentiated barbiturate-induced sleep suggesting the activation of GABAA receptor. It also potentiated the time spent in open arms of the maze and decreased the immobility time in forced swimming. In conclusion, naphthoquinone has anxiolytic, hypnotic and anti-depressant properties and is a potential therapeutic for anxiety, insomnia and depression.

• Journal of the Daesoon Academy of Sciences
• /
• v.33
• /
• pp.1-30
• /
• 2019

There have been three trends in the study of the view of humanity in Daesoon Thought: insider theology, outsider theology, and religious studies. This article is intended to interpret the view of humanity in Daesoon Thought from the perspective of Mircea Eliade's New Humanism. We find similarities between Daesoon Thought and Eliade's New Humanism. Daesoon Thought deals with the complexities of life as being labyrinth-like and puts Jeungsan's view of humanity at the center of a Daesoon worldview. Jeungsan examines the existential problems which humans face in the Former World, and gives the religious remedies of Haewonsangsaeng (the resolution of grievances for mutual beneficence) and Boeunsangsaeng (the grateful reciprocation of favors for mutual beneficence) to transform humanity's worldview for usage in the Later World. Jeungsan suggests a way of peace instead of the revolution of Donghak. Through the Reordering Works of Heaven and Earth, Jeungsan changes the mutual contention of the Former World into the mutual beneficence of the Later World. The cosmology of Daesoon Thought recovers the relationship between divine beings and human beings in the three realms, and proposes a system of ethics that promotes virtue and reproves vices and human-centericism. In conclusion, the view of humanity in Daesoon Thought is an unapologetic view of homo-religiosus from within a new humanism.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.31 no.6
• /
• pp.1084-1091
• /
• 2002

Mortierella alpina, a common soil fungus, is the most efficient organism for production of production acid presently known. Since arachidonic acid are important in human brain and retina development, it was undertaken the growing effect containing diet as a food ingredient. Arachidonic acid rich oil derived from Mortierella alpina, was subjected to a program of studies to establish for use in diet supplement. This study was compared the growth and learning effect of fungal oil rich in arachidonic acid by incorporated into diets ad libitum. Sprague-Dawley rats received experimental diets 5 groups (standard AIN 93 based control with beef tallow, extract oil 8%, and 4%, and Mortierella alpina in diet 10% and 20%) over all experiment duration (pre-mating, mating, gestation, lactation, and after weaning 4 weeks). Pups born during this period consumed same diets after wean for 4 weeks. There was no statistical significance of diet effects in reproductive performance and fertility from birth to weaning. But the groups of Mortierella alpine diet were lower of weight gain and diet intake after weaning. The serum lipids were significantly different with diet groups, higher TG in LO (oil 4%) group of dams, and higher total cholesterol in LF (M. alpina 10%) of pups, although serum albumin content was not significantly different in diet group. The spent-time and memory effect within 4 weeks of T-Morris water maze pass test in dam and 7-week- age pups did not differ in diet groups. On the count of backing error in weaning period of pups was lower in HO(extracted oil 8%) group. In the group of 10% and 20% Mortierella alpina diet, DNA content was lower in brain with lower body weight, but liver DNA relative to body weight was higher than control. Further correlation analyses would be needed DNA and arachidonic acid intakes, with Mortierella alpina diet digestion rate.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.61 no.2
• /
• pp.263-269
• /
• 2012

In order to present that the electromagnetic compatibility standards following the frequency goes up which is based automotive electronics, in this paper, a hybrid/electric vehicle battery which reflects the frequency of the equivalent circuit model is introduced. By using this circuit modeling, the impedance characteristics can be analysed and an analyze of battery one cell is finished. Using this model, each different from the discharging situation, the discharge characteristic curve could be led. Basic theoretical approaches and measuring results through MATLAB and experimental validation of the EIS measurement equipment was used.

• Journal of the Korea Computer Graphics Society
• /
• v.2 no.2
• /
• pp.37-44
• /
• 1996

Networked virtual reality systems provide a consistent virtual world to the users, possibly distributed across long distances, and have been widely applied in the military, entertainment, and architectural areas. Large processing requirements, however, made these systems be mainly researched on the platforms of high-performance graphics workstations. This paper presents several problems when networked virtual reality systems are implemented on commodity PCs: two problems related with 3D graphical processing, and the other related with network bandwidth and transmission delay. We also suggest solutions to these problems and analyze their performance effect based on an architectural simulation application.

• The KSFM Journal of Fluid Machinery
• /
• v.16 no.1
• /
• pp.32-39
• /
• 2013

The multi-stage control valve is one of the devices which controls cavitation and high pressure drop. To attain the high pressure drop, the conventional control valves adopted the multi-stage trim to avoid the occurrence of local cavitation in valves. This work studied the effect of divergence angle on the characteristics of multi-stage trim. Pressure drop and flow characteristics was calculated for the 1 passage of multi-staged trim by using the FLUENT 6.3.26. The result showed that the pressure drop is significantly influenced by the divergence angle of multi-stage trim. In addition, the pressure drop increased consistently as the Reynolds number and divergence angle increases.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1998.05a
• /
• pp.159-165
• /
• 1998

The RCM strategies are considered as an effective maintenance tool in nuclear power plants to allocate limited resource efficiently. In this paper, the importances of HPSI system on the CDF were analyzed with PSA model of Yonggwang units 1,2. The HPSI system was chosen because it is of one of the pilot system for the study of Yonggwang units 1,2 RCM. With the remodeling of the HPSI system, the total CDF of 16 initiating events was quantified and the importance of 74 basic events of HPSI was analyzed.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.10 no.1
• /
• pp.67-75
• /
• 2002

A study to investigate the influence of combustion chamber shape, especially piston top face configuration, on the combustion stability is presented with CFD analysis and single cylinder GDI engine test. Initial configuration of the piston bowl was designed with CFD analysis and further parametric studies of the design factors on the piston top face were carried out through the single cylinder GDI engine test. It was found that both the geometry of piston top face and the compression ratio have great influences on the combustion stability. Of interest is that the design factors of the GDI piston to prevent mixture diffusion out of the piston bowl have important roles for the stable combustion at the stratified mixture condition. Also the relationship between spray impingement and flow pattern in a GDI piston bowl should be considered to design an optimal bowl configuration for stable stratified combustion.