• Journal of the Korean Graphic Arts Communication Society
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• v.25 no.2
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• pp.85-93
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• 2007

The printed mottle is recognized as the most common printing problems in using coated paper and one of the most difficult problems to solve in offset printing. Printed mottle is caused by an uneven penetration of ink into the paper and binder migration. The prevention of printed mottle requires of coating color formation, especially the minimum of binder migration. Printing worked by interaction of printing ink, coated paper and printing pressure. In this study, we investigated the effect of the properties changing of coated paper and printing conditions such as ink dispersion, nip condition and amount of ink transfer.

• Journal of the Korean Society of Clothing and Textiles
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• v.11 no.2 s.24
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• pp.23-36
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• 1987

The purpose of the suudy was to develop a computer program for pattern mating of women's pant's. Computerization of the pattern making process was expected to provide higher accuracy and efficiency in pattern mating. The VAX-11/750 Computer and the CALCOMP PLOTTER 965 were used in this study. The procedures of the study were as follows : 1. A slacks pattern was selected. 2. The co-ordinate points were indicated relative location of all necessary in draffing. Total sixty co-ordinate points were instituted from (AX(1), AY(1)) to (AX(24), AY(24)), from (BX(1), BY(1)) to (BX(36), BY(36)). 3. A program for drafting was developed. Refer to (Table 3). 4. The procedures of drading of standard size were accomplished by using same method. The program was developed to drafting pattern for women by putting indivisual body measurement. The body measurements for stacks pattern were as follows : slacks length. Croach length. Hip length. nip circumference. waist circumference.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.1309-1314
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• 2008

I.G.G is abbreviation for Inert Gas Generator, High temperature in Cargo Tank it desulfurize, exhausted and froze the gas that combined brimstone element and soot, then supply Inert gas by blower, and mack tank inside incombustible range this is equipment that nip in the bud the explosion. The blower for suppling inactivated gas has big impeller with heavy weight to achieve the high pressure, it causes a delay for first operation time and too much load is delivered to motor, total destruction by fire of motor is happening frequently. On this research, we will reduce the size & weight of impeller and install it with several stage, it makes an effect for reducing the first operation time. We also intend to contribute to efficient IGG blower design by research a flowing & pressure specialty from the diameter of impeller, number of blade, and size of casing.

• Macromolecular Research
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• v.12 no.5
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• pp.501-506
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• 2004

We have investigated the spectral properties of DNA, including its electric absorption, circular and linear dichroism (CD and LD), and fluorescence emission, in the DNA-linear polyethyleneimine (LPEI) and DNA-branched polyethyleneimine (BPEI) complexes at various polymer concentrations. The spectral properties of both complexes are similar. We observed a relatively moderate change in the absorption and CD spectra at low amine/DNA phosphate (NIP) ratios (< 0.5), followed by a drastic collapse within the N/P range from 0.8 and 1.0. The absorption and CD spectra recovered as the N/P ratio increased to ca. 1.2. In contrast, the LD and emission of ethidium intercalated between the DNA bases decreased almost linearly at N/P ratios between 0.0 and 1.0. These spectra never recovered at higher N/P ratios. We believe that the moderate changes in the spectrum at low N/P ratios occurred because of electrostatic interactions between DNA and BPEI, while the collapsed spectra at N/P ratios between 0.5 and 1.5 occurred because of condensation/aggregation of the DNA. Considering the structure of the polymers, we suggest that the secondary amino group of LPEI and all three amino groups of BPEI are equally involved in DNA condensation.

• Journal of the Korean Graphic Arts Communication Society
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• v.23 no.2
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• pp.129-141
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• 2005

The liquid film behavior between two rotating rollers has been analyzed for many years. Their contributions were, however, limited almost within the areas of polymer laminar flow in there. When the slip contact of two rotating rollers is used as a role of vehicle to distribute the liquid discharged on to each roller after splitting from the nip, there was few available relationship to control the roller speed and to design system. On this work it was possible to get out a certain relationship between the discharged film thickness ratio and the roller surface seeds without any help of pressure limit at the splitting point. The hydrodynamic analyzation of Newtonian liquid behavior around the point was well proved on some manipulative experiment. The thickness ratio increases along with the roll surface speed ratio increases. And the discharged volume flow rate ratio on each roller surface varies with square of the speed ratio. Both of these relationship have a decision factor also made up by the speed ratio.

• Journal of the Korean Graphic Arts Communication Society
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• v.28 no.2
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• pp.31-44
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• 2010

Ever since the introduction of offset lithography, an operator have looked for ways to improve the process by reducing need for dampening solution. Lithography like off-set printing is processed using the repellent properties between water and oil, so all inks for lithography printing must work with dampening solution. The dampening solution may cause the emulsification of ink by the printing pressure in the printing nip. Emulsified ink changed viscosity, tack and causes problems such as bad transfer, uniform density and printed mottle. For a high quality web printing, we studied the effect of emulsified heat-set web inks on the printability, such as amount of ink transfer, printed density and uniformity. For this study, we were carried out by using IGT printability tester C1. For determination of ink properties using the spread meter and Thwing Albert Ink-o-meter, and using the densitometer and image analysis for printed quality determination. The experimental results of this study, we look forward to can be used as the basis for improve of the web print quality.

• Applied Biological Chemistry
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• v.21 no.3
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• pp.185-192
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• 1978

Three herbicides including nitrofen, alachlor and butachlor f?ere applied to farm soils of oil-bearing crops rape, soybean and paddy rice and their residual levels in the soil and seeds were determined by ECD-attached gas chromatograph without hydrolysis. Applied herbicides were decreased abruptly 2 weeks after application and slowly thereafter, reaching below 10% level while the extent of disappearance varied depending on the herbicides, crops and soil conditions. The herbicides were not detected at all in the seeds of tested crops within the detection limit of the analytical methods employed.

• Journal of Aerospace System Engineering
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• v.11 no.1
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• pp.35-40
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• 2017

Aircraft diagnostic systems identify system failures and nip aircraft accidents in the bud by removing hazards that hinder Safety Of Flight (SOF). The necessity for diagnostic systems is increasing as aircraft manufacturing technology is modernized. Many countries have conducted studies and developed diagnostic systems. However, studies about diagnostic systems are very few in Korea. This study defines the scope of aircraft diagnostics systems and closely considers methods to ensure the Safety Of Flight (SOF) for military aircraft.

• Journal of Korean Biological Nursing Science
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• v.8 no.2
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• pp.29-39
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• 2006

The aim of this study was to examine the effect of telephone follow-up on glycemic control, lipid profiles. and treatment method in diabetic patients with depressive symptoms over one year follow-up period. Twenty-two diabetic patients attended the structured diabetes education program between March 2004 and February 2005 and completed a questionnaire using the Beck Depression Inventory(BDI) to measure depressive symptoms. The patients showed depressive symptoms with the criterion being a BDI score at least 16. The intervention was applied to the telephone follow-up for one year. Data were analyzed using Wilcoxon signed rank test and McNemar test. The patients decreased their mean glycosylated hemoglobin(HbAlc) levels by 1.9%(p=0.001). There was a significant mean change in the fasting blood sugar(FBS) level, with a mean change of -61mg/$d{\ell}$(p=0.008). These findings indicated that the telephone follow-up may be effective in the HbAlc and FBS control.

• Korean Chemical Engineering Research
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• v.54 no.1
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• pp.57-63
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• 2016

Thermally induced phase separation (TIPS) and nonsolvent induced phase separation (NIPS) were simultaneously induced for the preparation of flat PVDF membranes. N-methyl-2-pyrrolidone (NMP) was used as a solvent and dibutyl-phthlate (DBP) was used as a diluent for PVDF. When PVDF was melt blended with NMP and DBP, crystallization temperature was lowered for TIPS and unstable region was expanded for NIPS. Ratio of solvent to diluent changed the phase separation mechanism to obtain the various membrane structures. Contact mode of dope solution with nonsolvent determined the dominant phase separation behavior. Since heat transfer rate was greater than mass transfer rate, surface structure was formed by NIPS and inner structure was by TIPS. Quenching temperature of dope solution also affected the phase separation mechanism and phase separation rate to result in the variation of structure.