• Journal of Sensor Science and Technology
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• v.29 no.4
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• pp.215-219
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• 2020

MnCo₂S₄/CoS₂ electrode with highly accessible electroactive sites is prepared using the hydrothermal method. The electrode exhibits an areal capacitance of 0.75 Fcm^-2 at 6 mAcm^-2 in 1 M KOH. The capacitance is further increased to 2.06 Fcm^-2 by adding K₃Fe(CN)₆ and K₄Fe(CN)₆ (a redox couple) to KOH. This increment is associated with the redox-active properties of cobalt and manganese transition metals, as well as the ion pair of [Fe(CN)₆]^-3/[Fe(CN)₆]^-4. The capacitance retention of the MnCo₂S₄/CoS₂ electrode is 87.5% for successive 4000 charge-discharge cycles at 10 mAcm^-2 in a composite electrolyte system of KOH and ferri/ferrocyanide. The capacitance enhancement is supported by the lowest equivalent series resistance (0.62 Ωcm^-2) of MnCo₂S₄/CoS₂ in the presence of redox additive couple compared with the bare KOH electrolyte.

• The Korean Journal of Ecology
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• v.22 no.5
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• pp.241-254
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• 1999

The forest vegetation in Mts. Ilwol, Chongryang, Milim, Honglim, Yongdung, Agi and 607 m peak of the northen part of Kyungpook province, Korea was classified and described in terms of the physiognomy and numerical syntaxonomy. The forest was divided into the ten communities belonging to the three groups by the species combination of the tree layer based on their dominances. The three groups also were corresponded well with the result of cluster analysis. But the classification by TWINSPAN showed that the vegetation was divided into only two groups for having any ecological senses. A result of DCA was corresponded closely with that of TWINSPAN and explained some environmental factors. From the above results, it is concluded that the classification by the species combination of the tree layer is also applicable to the classification of plant communities. The above results were compared with the existing study results of the ZM phytosociology.

• Journal of the Korean Society of Costume
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• v.23
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• pp.169-181
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• 1994

The Purpose of this study is to help the neck-tie business enterprise establish the reasonable marketing strategy meeting consumer' needs by grasping their characteristic of purchasing neck-ties and their attitudes toward trademarks. The findings of this study are as follows : 1. It was shown that the neck-tie enterprise tended to appeal to megazines, catalogues , etc as promotional politics, while the tips obtained by consumers would come from the showcase at the purchasing place. and the consumer showed a positive response to the salesperson's advice. For this result, it is required to place further emphasis on the marketing policy such as the display of products at the store or the education of sales persons. 2. It was shown that the consumer tended to use the department store as the purchasing place remarkably, and so it could be found that the use of the department store is becoming generalized to the consumer. But is was shown that the consumer sensitive to prices tended to make use of the marketplace as the purchasing place, so the practical marketing strategy should be established in relation to this trend. 3. The important elements excreting an influence on the consumer's purchasing the neck-tie were shown to be in orders of design > color> harmony > with suit > price > quality, and the product differentiation policy used by the business enterprise to appeal to the consumer was shown to be in orders of design >color > quality > material > price. Accordingly , it was consistent with the consumer's criterion for choice to an extent. 4. It was shown that the selling price for the neck-tie brand actually was higher for imported or technically cooperated brands than for the home-made brand. Thus, the consumer's perception of the price for the neck-tie was consistent with in this regard, consumers did not feel some difference in quality between the home -made neck-tie brand and the imported or technically cooperated neck-tie brand . Therefore, it is important to produce the product capable of satisfying the consumer's need by manufacturing the own brand on basis of impored technology.

• Journal of Korea Multimedia Society
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• v.9 no.10
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• pp.1344-1353
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• 2006

In terms of the product conforming to a social value of integration of digital and design, the importance of brick toys aiming at the convergence with digital technology in various ways has increased on the strength of expanded base of users and in pursuit of design innovation. Given that previous studies on bricks centered on the role as a tool of flay and education, it is true that studies on other indefinite potentials and expandability in light of multimedia have not been conducted. This study was initiated with a question how the brick system toys, which is gradually gaining popularity, has evolved and is aimed at examining the status of evolvement through study of basic theories and analysis of examples. Based on this, it is intended to explore the possibility of the digital brick system by executing design process utilizing examples of comprehensive brick system with expanded form.

• Journal of Advanced Navigation Technology
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• v.18 no.4
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• pp.296-303
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• 2014

Recently a system is being required to replace ILS due to increasing air traffic. In this paper, Curved approach is applied to an airport where ILS approach cannot be applied due to its geographical condition and restricted aerospace condition, and verified by flight test. After analysing conditions of Tae-an airfield of Hanseo University with virtual ILS approach, airfield applicability was evaluated by Curved approach using by GPS. Normally simulation is performed after establishing approach procedure using electric map, but recently verification is being performed by flight test without simulation because accuracy and reliability are increased. In this paper, established procedure is verified modified by flight test with Pilot Test and Auto Pilot test and controllability and passenger's stability were also checked.

• Journal of Advanced Navigation Technology
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• v.16 no.1
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• pp.76-81
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• 2012

With the spread of the various mobile devices, the studies on the learning management system based on the u-learning are actively proceeding. The u-learning-based learning management system is very convenient in that there are no restrictions on the various access devices as well as the access time and place. However, the judgments on the authentication for the user and whether learning is focused on are difficult. In this paper, the voice and user face capture interface rather than the common user event oriented interface was applied to the learning management system. When a user is accessing the learning management system, user's registered password is input and login as voice, and the user's learning attitude is judged through the response utterance of simple words during the process of learning through contents. As a result of evaluating the proposed learning management system, the user's learning achievement and concentration were improved, thus enabling the manager to monitor the user's abnormal learning attitude.

• Journal of Advanced Navigation Technology
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• v.14 no.2
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• pp.191-197
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• 2010

Many does an application and application but the image analysis of face detection considerably is difficult. In order for with effect of the illumination which is irregular in the present paper America the illumination to range evenly in the face which is detected, detects a face territory, Complemented the result which detects only the front face of existing. With LAB color illumination revisions compared in Adaboost face detection of existing and 32% was visible the face detection result which improves. Bought two images which are input and executed Glassfire label rings. Compared Area critical price and became the area of above critical value and revised from RGB smooth anger and LAB images with LCFD system algorithm. The operational conversion image which is extracted like this executed a face territory detection in the object. In order to extract the feature which is necessary to a face detection used AdaBoost algorithms. The face territory remote login with the face territory which tilts in the present paper, until Multi-view face territory detections was possible. Also relationship without high detection rate seems in direction of illumination, With only the public PC application is possible was given proof user authentication field etc.

• Journal of Navigation and Port Research
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• v.33 no.8
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• pp.589-594
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• 2009

The Major inspection is a ship inspection which is executed voluntarily for tankers by Major oil companies(hereinafter it is called "Major"). To take the Major's cargo tanker should pass Major inspection. Thus, even though Major inspection is executed voluntarily, it is more important one than any other inspection for ship's crews and owner because it is closely related to the business profit of shipping company. In this study, authors suggested the improving measures after checking the problems concerned with Major inspection through status analysis. For the status analysis, authors carried out a questionary survey and interview with the interested parties, such as tanker crews, persons in charge of shipping company and inspectors, as well as studied the related literature and statistics data.

• Journal of Conservation Science
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• v.10 no.1 s.13
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• pp.31-37
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• 2001

The metallurgical investigation of four lumps of bronze from the third building site of the northern workshop site at the Neungsan-ri temple site in Buyeo was performed. The microstructures of a section of sample was observed by SEM and qualitative and quantitative analysis of the sample was performed by EDS. The results are as follows: Sample 1 of the lump of bronze from northern workshop site in the third building site at Neungsan-ri temple site and sample 2 are speculated to be low-quality bronze resulting from refinery of matte which formed on the process of bronze refinery. Sample 3 is speculated as a lump of bronze which is one of Cu-Sn system and the one made by alloy only with pure bronze and tin on the process of bronze refinery. Sample 4 is confirmed as a lump of bronze which is one of Cu-Sn-Pb system from alloy of tin and lead into pure bronze. It is believed that the third building site at Neungsan-ri temple site in Buyeo produced bronze matte by refinery of copper ore or produced low-quality bronze by melting matte imported from outside.

• Journal of the Korean Society of Industry Convergence
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• v.7 no.1
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• pp.107-113
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• 2004

Several transition metal complexes, [$M(L)X_2$](M=Pd(II), Ni(II); X=CI, Br) are prepared with aminophosphine ligands such as 1,2-bis{(diphenylphosphino)amino}ethane{$Ph_2PNHCH_2CH_2NHPPh_2$}($L_1$), 1,2-bis{(diphenylphosphino)amino}propane{$Ph_2PNHCH(CH_3)CH_2NHPPh_2$}($L_2$), trans-1,2-bis{(diphenylphosphino)amino}cyclohexane{$Ph_2PNHC_6H_{10}NHPPh_2$}($L_3$) and 1,2-bis{(diphenylphosphino)amino}benzene{$Ph_2PNHC_6H_4NHPPh_2$}($L_4$). The properties of these complexes are characterized by optical spectroscopic methods including UV/vis spectroscopy, CD, IR, $^1H$- and $^{31}P-NMR$ together with conductometer and elemental analysis. All complexes are stable under atmospheric environment. Catalytic reactivity for C-C coupling between [$M(L)X_2$] and Grignard reagents(RMgX; R=phenyl, propyl, buthyl) by thermolysis were investigated utilizing GC/mass, $^1H$- and $^{13}C-NMR$. When mol scale is 1:20 at [$Pd(L)Cl_2$] and Grignard reagents, the high catalytic activity for C-C coupling is apparent. The [$M(L)X_2$](X=Cl, Br) complexes which have strong bond at M-P exhibit high yields for C-C coupling reactions. When the central metal ion is Pd(II), the high catalytic activity for C-C coupling is apparent. The complex coordinated with Br shows higher catalytic activity for C-C coupling reactions compared to Cl.