• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2004.10a
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• pp.108-113
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• 2004

The compressive axial collapse tests were performed to investigate energy absorption characteristics of Al/CFRP compound tubes which are aluminum tubes wrapped with CFRP (Carbon Fiber Reinforced Plastics) outside the aluminum circular and square tubes. Based on collapse characteristics of aluminum tubes and CFRP tubes respectively, the axial collapse tests were performed for Al/CFRP compound tubes which have different fiber orientation angles. Test results showed that Al/CFRP compound tubes supplemented the unstable brittle failure of CFRP tubes due to ductile nature of inner aluminum tubes. In the light-weight aspect, specific energy absorption were the highest for Al/CFRP, CFRP in the middle, and aluminum the lowest. Also, specific energy absorption of circular tubes was higher than square tubes'. It turned out that fiber orientation angle of Al/CFRP compound tubes influence specific energy absorption together with the collapse modes of the tubes.

• Journal of Korea Multimedia Society
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• v.9 no.2
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• pp.151-159
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• 2006

The ratio of a segmentation algorithm of compound nouns causes an effect a lot in nouns which are not in the dictionary. The structure of Korean compound nouns are mostly derived from the Chinese characters and it includes some preference ratio. So it will be able to use segmentation rule of compound nouns. This paper suggests a segmentation algorithm using some preference ratio of Korean compound nouns which are not in the dictionary. The experiment resulted in getting 88.49% of correct segmentation and showed effective result from the comparative experimentation with other algorithm.

• Journal of the Korean Society of Industry Convergence
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• v.13 no.4
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• pp.191-196
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• 2010

This study explores the solution of a variety of conditions of the natural dyeing with the Mulberry. To obtain this, the Cu complex compound was added into the extracts. The Mulberry extract was added the Copper acetate to obtain the Black sediment the metal complex compound of anthocyanidin. According to the result of using the complex compound of the solid material, the dyeing properties were excellent. The metal complex compound acted as a mordant, thus it reduced the process of mordanting in the natural dying.

• Journal of the Korean Solar Energy Society
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• v.34 no.6
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• pp.85-92
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• 2014

This study carried out experimental on the cooling characteristics of clathrate compound including TMA(Tri-Methyl-Amine ; $(CH_3)_3N$) as a low temperature latent heat storage material. And additive was used for subcooling improvement of TMA-water clathrate compound. The conclusion of above study is as following ; TMA 25wt%-water clathrate compound is shown stable phase change and low subcooling degree. The subcooling was improved in the case ethanol($CH_3CH_2OH$) 0.5wt% is added to TMA 25wt%-water clathrate compound.

• Speech Sciences
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• v.12 no.4
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• pp.153-166
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• 2005

This paper attempts to examine the accent implementation and perception of noun phrases and compound nouns in English sentences, arguing that primary stress of noun phrase and compound noun is realized in relative prominence in intonation. The production test examines how the stress patterns of the noun phrases and compound nouns are realized in intonation of the English native speakers' utterances. The perception test investigates English and Korean listeners' comprehension of the intonation of the noun phrases and compound nouns. And the results of this experimental study show that speakers and listeners produce and perceive the primary stress as a relatively prominent accent even if in contrast of English listeners, Korean learners have difficulty in using the cue of pitch accent location and figuring out compound nouns and noun phrases.

• International Journal of Fuzzy Logic and Intelligent Systems
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• v.4 no.3
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• pp.306-310
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• 2004

This paper suggests a reverse segmentation algorithm using affix information and some preference pattern information of Korean compound nouns. The structure of Korean compound nouns is mostly derived from Chinese characters, and it includes some preference patterns utilized as a segmentation rule in this paper. To evaluate the accuracy of the proposed algorithm, an experiment was performed with 36,061 compound nouns. The experiment resulted in getting 99.3% of correct segmentation and showed excellent satisfactory results from the comparative experimentation with other algorithms. Especially, most of the four-syllable or five-syllable compound nouns were successfully segmented without fail.

• YAKHAK HOEJI
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• v.43 no.5
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• pp.584-590
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• 1999

Bioactivity-directed fractionation from the seeds of Annona cherimolia resulted in the isolation of two known cytotoxic compounds : corrosolin (1) and compound-2 (2). The structures of these compounds were characterized on the basis of chemical and spectral data. Corrosolin has a relative stereochemical relationship of threo/trans/threo for the mono-tetrahydrofuran (THF) ring with two flanking hydroxyls, from C-15 to C-20, which is the annonacin type. Compound-2 has a relative stereochemical relationship of threo/trans/threo/trans/threo for the adjacent bis-THF ring with two flanking hydroxyls, such as in the asimicin type. The absolute configurations of carbinol carbons in corrosolin in corrosolin were determined as 10R, 15R, and 20R by analysis of its Mosher ester derivatives. Corrosolin and compound-2 are known, but are first isolated in this plant.

• Journal of the Korean Society of Safety
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• v.13 no.3
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• pp.96-101
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• 1998

In order to study the change in mechanical properties and anti-flammablilty of ethylene-ethylacrylate copolymer(EEA) very low density polyethylene(VLDPE) compound that could be used as communication cable sheath using $Mg(OH)_2$ as a non-toxic flame retardant, 100, 125, and 150phr $Mg(OH)_2$ were added to 100 parts of EEA-VLDPE compound, 100 EEA : 0 VLDPE, 50 EEA : 50 VLDPE, and 0 EEA : 100 VLDPE, respectively. $Mg(OH)_2$ was a good non-toxic flame retardant for communication cable sheath and anti-flammability increased with the amount of $Mg(OH)_2$ in compound. The mechanical properties-MI, Ts, and Eb-decreased with increasing in the mixing ratio of EEA but oxygen index(OI) increased with increasing in the amount of EEA. The best composition of $Mg(OH)_2$ in this study was 150phr to 50 EEA : 50 VLDPE compound for the anti-flammability.

• Applied Biological Chemistry
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• v.38 no.3
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• pp.269-272
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• 1995

Antibacterial activity test of solvent fractions, sesquiterpenoid lactones, and Compound I and II extracted from Chrysanthemum boreale M. and Chrysanthemum indium L. were performed against four microorganisms. Among the tested substances, antibacterial activities were appeared against B. subtilis and V. parahaemolyticus at the chloroform fraction, sesquiterpenoid lactones and Compound I extracted from C. boreale. But chloroform fraction and sesquiterpenoid lactones extracted from C. indicum were showed weakly than those of C. boreale. Compound II and all fractions extracted from C. indicum were not appeared against the all tested microorganisms.

• Journal of Mechanical Science and Technology
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• v.20 no.6
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• pp.770-781
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• 2006

This paper defined design constraints for the compound CVTs (continuously variable trans-missions) by combining power-circulation-mode CVTs and power-split-mode CVTs, which were proposed for connecting 2K-H I-type differential gear to V-belt-type CVU (Continuously Variable Unit). The design constraints are the necessary and sufficient conditions to avoid geometrical interferences among elements in the compound CVTs, and to guarantee smooth assembly between the power-circulation-mode CVT and power-split-mode CVT Two com-pound CVTs were designed and manufactured in accordance with the design constraints. With these compound CVTs, theoretical analysis and performance experiments were conducted. The results showed that the design constraints were valid and effective design method, and that the designed compound CVTs had the improved performance.