• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 1999.04a
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• pp.1-6
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• 1999

A study was made to determine the effect of plastic pigment on the coating structure and printability of coated paper. Three basic plastic pigments were investigated such as solid-bead type of plastic pigment, binder type of plastic pigment and hollow type of plastic pigment. In the systems investigated, it was observed that particle shape and structure of plastic pigment had influenced on the rheology of coating color, the state of packing, and the properties of coated paper. The materials investigated were restricted to plastic pigments commonly uesd in paper coating formualtion. Inorganic pigments used in this research were kaolin clay which is platelets and calcium carbonate which is rhombic. Three kinds of plastic pigments were blended in the color made up with two inorganic pigments, respectively. The combination of pigments were carried out (1) to determined the effect of paticle structure of plastic pigment on the state of dispersion of coating color, (2) to observe the effect of temperature of calender on the property of coated paper prepared with plastic pigment. The data indicated that binder and hollow type of plastic pigment had the best results on improving the properties of coated paper such as paper gloss, opacity and air permeability ect. and solid-bead type of plastic pigment in the next place.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1997.04a
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• pp.54-61
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• 1997

Furthermore the rothor pole, with a solid type, manufactured by cold forging process at present should dmploy 3 press lines which consist of total 7 processes. Since A.S.B. treatment is prerequisite for the press line, the 3 times of A.S.B. treatment requires a long lead time, with little contribution to the reduction in cost. The author has investigated, through this researach, the possibility of a new forging method for a rotor pole production with (1) 2 pass instead of 3 press lines (2) only one A.S.B. treatment instead of 3 ones (3) solid type instead of sectional type, and (4) improvment of material property during process using a modified forging process and a specially designed die.

• Journal of the Korean Society of Combustion
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• v.7 no.3
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• pp.16-22
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• 2002

Combustion performance of an internally cycloned circulating fluidized bed for paper sludge was discussed through a series of batch type experiments. Operation parameters such as water content, feeding mass of sludge and secondary air injection rate were varied to find out the effect on the combustion performance, which was examined with carbon conversion rate and pollutant emission such as CO and NOx. A conventional solid fuel reaction was observed in the experiments of varying water content and feeding mass of the sludge, which is characterized with kinetic limited reaction zone, diffusion limited reaction zone and transition zone. Secondary air injection with swirl enhances the mixing of the gas phase as well as the solid phase, and improves combustion efficiency accompanied with higher carbon conversion rate and lower pollutant emission rate.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2000.10a
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• pp.7-11
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• 2000

In this paper was studied on the mechanical characteristics of Glass Fiber Reinforced Plastics(GFRP) of the steel bar it is to replace. The advantage of FRP such as high strength, low weight and chemical inertness or noncorrosiveness can be fully exploited. GFRP bar were successfully fabricated at l0mm nominal diameters of solid and hollow types using a pultrusion method. Tensile and bending specimens from this bar were tested and compared with behavior of GFRP rebar and steel bar.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.10
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• pp.172-179
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• 1998

To quickly determine the effect of the substitute component on the machine's performance is very important in the design and manufacturing processes. And minimizing machine cost and maximizing machine quality mandate predictability of machine accuracy. In this study, in order to evaluate the effects of the component's geometric errors and dimensions on the machining accuracy of gantry-type 5-axis machining centers, a geometric error analysis and virtual manufacturing system are developed based on the mathematical model for the shape generation motion of machine tool considering the component's geometric errors and dimensions, the solid modeling techniques and so on.

• Journal of the Korean Society of Combustion
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• v.9 no.3
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• pp.1-9
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• 2004

This study is aimed to characterize the combustion behavior of solid fuel in the various types of the combustors: stoker, rotary kiln and fluidized bed type combustors. Three different types of reduced-scale combustors are introduced, and temperatures and flue gas compositions are measured for various fuel sizes, water contents, initial temperature, and air flow rates. In case of the rotary kiln combustor, effects of rotating speed of the combustor are also investigated. Mean carbon conversion time (MCCT) and flame propagation rate (FPR) are used for the quantitative analysis. It is revealed that the reaction rates of the fuel are significantly influenced by the fuel characteristics, type of the combustors and air flow rate. Major design parameters for each type of the combustors are summarized through the reduced-scaled model analysis.

• Journal of the Korean Recycled Construction Resources Institute
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• v.8 no.4
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• pp.581-589
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• 2020

In this paper, a solid capsule was prepared using a crystal growth type inorganic material capable of hydration reaction, the quality and mechanical healing properties of self-healing mortar with solid capsules were evaluated. Solid capsules were mixed 5% by mass of cement. Reloading test results of compressive load, it was found to improve about 20% on average for the natural healing effect of Plain, in the case of the elastic range, the healing rate was about 79% at the 7 days of healing age and 98% at the 28 days of healing age. Reload test results of flexural load, in the case of the elastic range, the healing rate was about 79% at the 7 days of healing age and 98% at the 28 days of healing age. Through these results, it is judged that the healing performance of solid capsules has also an effect on mechanical healing properties such as strength in addition to the durability properties obtained by the permeability test. Since the strength tends to decrease as the solid capsules are mixed, it is considered necessary to compensate.

• Journal of Welding and Joining
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• v.34 no.5
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• pp.61-69
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• 2016

A numerical simulation of the solid/liquid coexistence temperature range, using solidification segregation model linked with the Kurz-Giovanola-Trivedi model, explained the mechanism of the BTR shrinkage (with an increase in welding speed) in type 310 stainless steel welds by reduction of the solid/liquid coexistence temperature range of the weld metal due to the inhibited solidification segregation of solute elements and promoted dendrite tip supercooling attributed to rapid solidification of laser beam welding. The reason why the BTR enlarged in type 316 series stainless welds could be clarified by the enhanced solidification segregation of impurity elements (S and P), corresponding to the decrement in ${\delta}-ferrite$ crystallization amount at the solidification completion stage in the laser welds. Furthermore, the greater increase in BTR with type 316-B steel was determined to be due to a larger decrease in ${\delta}-ferrite$ amount during welding solidification than with type 316-A steel. This, in turn, greatly increases the segregation of impurities, which is responsible for the greater temperature range of solid/liquid coexistence when using type 316-B steel.

• Journal of Sericultural and Entomological Science
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• v.38 no.1
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• pp.31-35
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• 1996

To develope a solid culture media for the mass culture of Beauveria bassiana conida, wheat bran was selected as C source and N source. The pellet media were prepared without(P-I) and with(P-II) solidified ingredient. The moisture for the growth of B. bassiana was required over 4 : 2 of Media : D.W (W/V). The growth of Beauveria bassiana on the media type was more effective in media of pellet type than that of powder type. In addition, production of Beauveria bassiana conidia on the media size was more effective in media of S type($\Phi$3mm) than that of L type($\phi$7mm). And the yield of Beauveria bassiana conidia at 2$0^{\circ}C$ cultivation on 3 weeks post inoculation was similar to that of $25^{\circ}C$. Above-mentioned results showed that pellet medium (P-I) was effective to growth of Beauveria, suggesting that the pellet media may be useful in the mass production of Beauveria bassiana conidia.

• Korean journal of food and cookery science
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• v.32 no.6
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• pp.800-810
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• 2016

Purpose: This study aimed to characterize the recipes of Hwachae in Korean cookbooks published from the 1600's to 1940's. Methods: We conducted a content analysis of thirteen old cookbooks (Eumsikdimibang, Jubangmun, Jeungbosallimgyeongje, Kyugonyoram, Imwonsibyukji, Gyuhapchongseo, Sieuijeonseo, Buinpilji, Chosunyorijebub, Chosunmusangsinsikyorijebub, Ganpyeonchosunyorijebub, Chosunyori, Chosunyoribub). We collected a total of 99 recipes of Hwachae and analyzed the ingredients used and characteristics of the recipes according to five groups of Hwachae: noodle type Hwachae, dumpling type Hwachae, fruit Hwachae, flower Hwachae, and the others. Results: The noodle type Hwachae included Changmeyon, Smyeon, Nanmyeon, and Waemyeon. Mung bean (81.0%) and Schisandra (95.2%) were mostly employed as solid ingredient and as beverage base, respectively. In the noodle type Hwachae, Wonsobyeong and Sudan belonged to the dumpling type Hwachae, in which mung bean (51.7%) was mostly used as solid ingredient and just water without any additive was used as the most popular beverage base (62.1%) unlike in other types of Hwachae. There were various types of fruit Hwachae, which used different fruits as solid ingredient such as pear, peach, cherry, strawberry, etc. Pears (44.4%) have been employed as the most popular ingredient and sweets such as honey and sugar have been used in all the fruit Hwachae. The flower Hwachae included Hwamyeon, Sunchaehwachae, Jangmihwachae, and Bomhwachae. In all the flower Hwachae, schizandra has been used as a beverage base. Conclusion: These findings provide basic information required for developing standard recipes of traditional Hwachae.