• Journal of the Korean Ceramic Society
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• v.39 no.10
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• pp.963-969
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• 2002

In this studies, methly celluloes was used as antiwashout admixture and when considering the physical properties and economical efficiencies of Underwater Concrete as the results of making an experiencing slump flow, flow loss, setting time, suspension and pH also compressive strength and underwater/an air compressive strength ratio according to the adding amount changes 5, 7, 9, 11 kg/$m^3$ to Underwater Concrete of melamine superplasticizer, the using amount of melamine superplasticizer in Underwater Concrete approximately represents 9 kg/$m^3$.

• 베이커리
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• no.9 s.362
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• pp.120-120
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• 1998

• The Korea Beekeeping Bulletin
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• s.340
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• pp.18-20
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• 2009

• The Korea Beekeeping Bulletin
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• s.337
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• pp.47-47
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• 2008

• Polymer(Korea)
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• v.26 no.2
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• pp.245-252
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• 2002

Thermodynamics and gas transport properties of polymethylmethacrylate (PMMA) blends with polyvinylmethylether (PVME) containing various amount of poly (styrene-b-methylmethacrylate) copolymer (P(S-b-MMA)) as a compatibilizer were studied. To extract interaction energies of binary pairs involved in the blends from the phase separation temperatures using an equation-of-state theory, PVME blends with methylmethacrylate copolymers containing various amount of styrene (SMMA) were prepared. PVME formed miscible blends with methylmethacrylate copolymers containing more than 70 wt% styrene and these miscible blonds showed a LCST-type phase separation behavior. Based on the interaction information obtained here, P(S-b-MMA) copolymer was added to the PMMA/PVME blends to enhance their compatibility. The average diameter of the dispersed rubber particles was gradually decreased for the blends of containing P(S-b-MMA) from 0 to 5 phr and then leveled off at a fixed size. At a fixed bland composition, the gas permeation was also increased as the P(S-b-MMA) content increased from 0 to 5 phr and then leveled off when the P(S-b-MMA) content was higher than 5 phr.

• Proceedings of the Korea Contents Association Conference
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• 2004.05a
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• pp.473-477
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• 2004

Cotton fabric was treated with Cationon UK(tertiary ammonium salt) to improve the dyeability to black tea colorants. In order to investigate the efficacy of Cationon UK for improving dyeing properties of cotton fabric, the effect of Cationon UK treatment conditions and dyeing conditions on dye uptake of the cotton fabrics treated with Cationon UK were examined and the colorfastness to washing, perspiration, rubbing and light was also evaluated for practical uses. Cationized cotton treated with Cationon UK showed high dye uptake at lower dyeing concentration and shorter dyeing time, compared with untreated. Dyeing temperature did not affect significantly dye uptake and the maximum dye uptake was obtained at pH 5. Most colorfastness was relatively good, showing 4/5∼5 rating.

• Korean Journal of Cognitive Science
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• v.2 no.2
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• pp.405-428
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• 1990

Language has a social function to communicate information. Linguists have gradually paid their attention to the function of language since the nineteen sixties, especially to the relationship of form, meaning and the function. The relationship could be more clearly grasped through disciyrse-based analysis than through sentence-based analysis. Many researches were centered on the discourse functional notion of topic. In the early 1970's the subject was defined as the grammatiocalized topic the topic as a discrete single constituent of the clause. In the late 1970's several lingusts including Givon suggerted that the topic was not an atomic, disctete entity, and that the clause could have more than one topic. The purpose of the present study is, following Givon, to study grammatical coding devices of topic and to measure the relative topic continuity/discontinuity of participant argu, ents in Korean narratives. By so doing, I would like to shed some light on effective ways of communicating information. The grammatical coding devices analyzed are the following eight structures: zero-anaphora, personal pronous, demonstrative pronouns, names, noun phrases following demonstratives, noun phrases following possessives, definite noun phrases and indefinite referentials. The narrative studied for the count was taken from the KoreanCIA chief's Testiomny:Revolution and Idol by Hyung Wook Kim. It was chosen because it was assumed that Kim's purpose in the novel was to tell a true story, which would not distort the natural use of language for literary effect. The measures taken in the analysis wre those of 'lookback', 'persistence', ambiguity'. The first of these, 'lookback', is a measure of the size of gap between the previous occurrence of a referent and its current occurence in the clause. The meausure of persistence, which is a measure of the speaker's topocal intent, reflects the topic's importance in the discourse. The third measure is a measure of ambiguity. This is necessary for assessing the disruptive effects that other topics within five previous clauses may have on topic identification. The more other topics are present within five previous clauses, the more difficult is the task of correct identification of a topic. The results of the present study show that the humanness of entities is the most powerful factior in topic continutiy in narrative discourse. The semantic roles of human arguments in narrative discourse tend to be agents or experiences. Since agents and experiences have high topicality in discourse, human entities clearly become clausal or discoursal topics. The results also show that the grammatical devices signal varying degrees of topic continuity discontinuity in continuous discourse. The more continuous a topic argument is, the less it is coded. For example, personal pronouns have the most continutiy and indefinite referentials have the least continutiy. The study strongly shows that topic continuity discontinutiy is controlled not only by grammatical devices available in the language but by socio-cultural factors and writer's intentions.

• Korean Chemical Engineering Research
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• v.45 no.4
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• pp.356-363
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• 2007

The stability of paste solutions for electroluminescence display(ELD) device was found to be greatly affected by kind and dosage of a stabilizer used. The stabilizer Disperbyk-180 showed the best stability performance against phosphor paste solutions among the stabilizers used during this study. The phosphor paste solutions remained stable over 90 days with a wide range of added amounts of Disperbyk-180. Based on the above results, screen printing test was performed. The addition of Disperbyk-180 into phosphor and dielectric paste solutions produced improved qualities such as no phase separation, no bubble generation and no significant viscosity change during printing process. Especially for the phosphor paste solution, both uniformity and brightness were significantly improved and the excellent adhesion onto the ITO film was found. The ELD device fabricated using the above same paste solutions showed brightness of $57.6cd/m^2$ at 100V and 400 Hz. The half lifetime of ELD device was measured as 1,250 hours and almost the same value observed with imported commercial paste solutions.

• Korean Journal of Microbiology
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• v.25 no.1
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• pp.57-66
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• 1987

Mutants of E. coli which showed increased sensitivity to MMS(methylmethane sulfonate)were isolated by MNNG mutagenesis and characterized by enzymatic assay, survival of simple alkylating agents and host-cell reactivation. E.coli mutant, 5-62, which showed absolute deficiency in 3-methyladenine DNA glycosylase II activity and had low capability of reactivating MMS-treated phage charon 35 was very sensitive to MMS and MNNG. NNS gene which confered resistance to the lethal effects of MMS was cloned in 5-62 strain. 5-62 mutants carrying recombinant plasmid, pMRG 1, which acquired resistance to the lethal effects of MMS had normal sensitivity to MNNG. Resistance to MMS was somewhat increased after they were treated with 0.5.$\mu$g MNNG/ml for 2 hours at $37^{\circ}C$. Although recombinant plasmid, pMRG 1, did not complement alk A mutation in 5-62 and ada mutation in 1-27 mutnat, mutnats transformed with this plasmid showed more capability of reactivating MMS treated phage than mutants.

• Journal of the Korean Ceramic Society
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• v.39 no.10
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• pp.970-976
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• 2002

In this paper, the slump flow of the concrete, suspension, pH, corrosion effect, bleeding and the characteristics of coompressive strength were analyzed using antiwashout underwater admixture and antiwashout underwater agent+corrosion inhibitor mixed admixtures(1type). The results showed that there were no rare difference in physical properties but in the results of rapid corrosion tests there were lots of corrosion inhibitor ratio differences between concrete using only antiwashout underwater admixture and the corrosion inhibitor mixed(1type). In the case of only antiwashout underwater admixture 5.4%, the case corrosion inhibitor mixed(1type) 0.07%, the Antiseawater of the concrete which uses the Corrosion Inibitor Mixed(1type) appeared highly.