• Korean Journal of Heritage: History & Science
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• v.51 no.4
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• pp.24-43
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• 2018

Thirty-five of Hwaban of Jeongjagak had been built in the last three hundred years, which means a Hwaban was made in almost every ten years. Jeongjagak is a building that requires a certain ornamentation having the identical Gongpo type, called E-ikgong, and maintains the same shape for a long time. While Hwaban is an element that faithfully serves the ornamental role, the field study found that Hwaban-chogak went through various changes over the years unlikely to Jeongjagak. This study enumerates and classifies the various types of Hwaban-chgak by outlining the similarities/differences of the various types of Hwavanchogak, and by discovering what the craftsmen aimed to express through the Hwaban-chogaks. As a result, Hwaban-chogak can be generally divided into two categories depending on the starting point of Chogak: 'Downward-Type' and 'Upward-type' and the study tried to find the origin of that. The first represents the stems of Hwaban crafts flowing from top to bottom, and the latter showing the opposite direction. Around 1740s Upward-type can be chronologically caragorised as; 'original- type' which contains lotus and 'modified- type' which eliminates lotus. It is inferred that the modified-type was caused by the employment system of the craftsmen. It is also recognized that the main frame of Hwaban-chogak had been maintained despite the fact that Chogak became increasingly ornamental for the next a hundred years from the Hwaban-chogak drawings in Whaseong-seongyeog-uigwe, which was completed in 1796. The study has a limitation that the focus of the research is only on the Hwaban of Jeongjagak and expected to look into Hwaban in the context of other construction elements such as Ikgong, Daegong and Anchogong for further studies.

• Korean Journal of Plant Taxonomy
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• v.35 no.4
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• pp.247-272
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• 2005

The Philadelphus schrenkii complex including P. schrenkii var. schrenkii, P. schrenkii var. jackii, P. schrenkii var. mandshuricus, P. tenuifolius, P. pekinensis, P. seoulensis, P. lasiogynus, and P. scaber, is distributed in China, Korea, japan, and far eastern Russia. Their taxonomic delimitations are obscure because quantitative characters, such as presence/absence and density of hair on leaf, petiole, style, disc, calyx-tube, and pedicel, are highly variable with no apparent characteristics that consistently distinguish from each other within the group. Thus, these morphological characters are reexamined using univariate analyses. P. pekinenesis is distinct from other taxa in having glabrous disk, calyx, pedicel, and leaf blade. In addition, the number of flowers in an inflorescence [(5)7-9(11) vs 5-7 in other taxa], smaller calyx tube [2.5-3 mm vs. (2.5)3-4(5.9) in other taxa], and slightly divided styles help distinguish P. pekinenesis from other related taxa in Korea. However, P. schrenkii var. schrenkii, P. schrenkii var. jackii, P. schrenkii var. mandshuricus, and P. lasiogynus show continuous variation in the pubescence of disk, calyx, pedicel, and leaf blade, and this may reflect a lack of divergence among them. Particular emphases are placed on P. tenuifolius and P. seoulensis, because of the high degree of morphological intergradation with respect to the degree of pubescence in disk, calyx, pedicel, and leaf blade and their inconsistent circumscription across various systematic treatments. P. scaber, distributed in the southern Korea, has often been treated as an independent species having exfoliated branchlets, distinct serrated leaf margin, and recurved styles. However, this current study suggests that P. scaber should be recognized as a form of P. tenuifolius because these distinguishing characters are continuous between P. tenuifolius and P. scaber. In geographical distribution, P. pekinensis is mainly distributed in the southern part of Korea, while P. tenuifoilus and P. schrenkii are commonly found all over the country.

• Journal of architectural history
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• v.26 no.2
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• pp.15-29
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• 2017

The purpose of this study is to comprehend strengthening Hwaban(flower-shaped support) design in the Two-lkgong style government buildings in the late Joseon period through the T-shaped wooden shrines, the architectures of royal palace and royal ancestral shrine. Following conclusions have been reached through the study. First, Janghwaban(the long plate carved with flower-shaped support) was installed in Injeongjeon(1805) for the first time. It took 40 years to introduce Janghwaban to the government building of Two-lkgong style compared with Injeongjeon. Second, the quantity of Hwaban had been increased from 1 to 5 for 300 years in the government building of Two-lkgong style. This had been steadily increased with the aim of strengthening design. Third, there was a limit to the increase in the quantity of Hwaban. The first reason was to control the rhythm between the Hwaban and the Pobyeok(the wall between Hwabans). The second reason was that if the Pobyeok was too narrow, it was difficult to plaster. The latter was solved by introducing the Janghwaban. Fourth, in attempting to stylize differently from Jusimpo(simple bracket system), the quantity of Hwaban increase played a very important role in the government building of the Two-lkgong style. Since the reconstruction of Gyeongbokgung Palace, Hwaban combined style with Ungong served as the norm of the royal palace architecture in the last Joseon period.

• Journal of architectural history
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• v.17 no.4
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• pp.97-112
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• 2008

In this study, I attempted to the architectural design characteristics of Daeung-Jeon in Sudeok Temple. For this purpose, After I set up several assumptions in the basis of the general characteristics of Korean wood architecture, and then, analyzed floor plan, structural formation and section sizes of structure and bracket members in relation to module and unit. As the results, the characteristics of the design process of plan and structure are follows. (1) 1 ja(尺), the unit applied to this building is measured $307.6{\sim}318.3mm$) and the average is 312.9mm (2) It is estimated that the floor plan designed on the basis of the top of columns. By the applied unit, every bay of the front side and the side is each designed by 15 ja and 8.5 ja. (3) The section is composed of piled members which have same section size. As basic module of section size called 'jae(재;材)', it is estimated at width 0.45 ja by height 0.75 ja. And as the secondary module, height between jae and is called 'gyoe(계;)' and it wes designed by three height size of 0.25 ja, 0.27 ja and 0.30 ja, (4) It is estimated that the section plan was designed by the order as follows. Firstly, the horizontal position of purlins wes decided on the basis of the intersection point of long and short rafters, and then the position and the section size of purlins and jangheyo(長舌) wes decided on the basis of the slope of roof and rafters. Secondly, going down from purlins, the members of structure composed of 'jae' and 'gyoe' was repeated. Lastly, for the purpose of linking the structure members located on the center line of adjacent purlins organically, the height of whaban(화반) was controlled.

• Journal of the Korean Chemical Society
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• v.27 no.3
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• pp.178-182
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• 1983

The conductances of sodium, potassium, ammonium, tetramethylammonium, and tetraethylammonium iodides, picrates(Pic) of sodium and potassium, and tetrabutylammonium tetraphenyl-boride have been measured in ethylene carbonate-acetone mixtures at $25{\circ}C$. The limiting equivalent conductances of the electolytes were computed by Fuoss-Kraus equation and the order was $(C_4H_9)_4NB(ph)_4 at any composition of the mixtures. The dissociation constants of the salts showed that the mixtures are good ionizing solvents for the salts. The order of limiting ionic equivalent conductance, $Na^+, is consistent with exactly the reverse order found for solvation number. Effective solvated radii calibrated by the Nightingale method showed that picrate ion seems to be unsolvated and that iodide ion seems to be solvated to some extent in the mixtures.

• Applied Chemistry for Engineering
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• v.24 no.1
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• pp.82-86
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• 2013

Palladium particles were synthesized with 1-buthyl-3-methylimidazolium trifluoromethanesulfonate ([Bmim][$CF_3SO_3$]) as an effective solvent during the synthesis. The morphology of the particles was affected by the concentration of [Bmim][$CF_3SO_3$]. Furthermore, the palladium on carbon powder was prepared with various [Bmim][$CF_3SO_3$] concentrations and calcinations temperatures as a catalyst for hexafluoropropylene hydrogenation. Catalytic activity was varied by both conditions significantly. Under the identical condition, the catalyst prepared by the same mole ratio of [Bmim][$CF_3SO_3$] and palladium, and calcined at $500^{\circ}C$ was the most active in this reaction.

• Korean Journal of Plant Resources
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• v.26 no.2
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• pp.271-283
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• 2013

Morphology of Korean Scrophularia species were reviewed to clarify taxonomic characters, their variations and taxon delimitation. Habitats, root forms, foliaceous types, glandular trichomes on stems and leaves, flowering seasons, calyx shapes, corolla colors and shapes, as well as ovary basal shapes are diagnostic characters to classify series in this genus. From the result, 1) S. alata is distinguished from its closely related species S. takesimensis by lengths of stem ribs, widths of petioles, and types of corolla lobes; 2) S. buergeriana is characterized by spike-like inflorescences, short peduncles and pedicels, and yellowish green corollas; 3) lanceolate-shaped leaves and calyces, and axillary-like cyme inflorescences delimitate S. koraiensis easily from the other taxa; 4) smaller leaves discriminate S. kakudensis var. microphylla from S. kakudensis var. kakudensis, and 5) S. cephalantha is distinguished from S. kakudensis by broadly ovate to sub-orbicular shaped leaves, earlier flowering seasons, and smaller numbered flowers on shorter inflorescences. In conclusion, the Korean Scrophularia is classified as 7 taxa, 6 species and 1 variety in 2 series. Keys to the series and taxa are provided.

• Korean Journal of Heritage: History & Science
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• v.47 no.1
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• pp.46-65
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• 2014

This study, under the title of Daeungbojeon Hall of Bulyeongsa Temple, Uljin and the architectural technique of the architect, aimed to make a comprehensive speculation on Daeungbojeon Hall of Bulyeongsa Temple whose accurate construction year was confirmed in 1725. While existing studies dealt with it separately between construction and Buddhist art history this study attempted to sort out it in one perspective by means of comparison with compatible objects in the area. The results are as follows. 1st, by means of comparison of wall painting of Daeungbojeon Hall of Bulyeongsa Temple and other wall paintings of Gyeongsang-do Province, it was estimated to be created before and after 1725, the founding year of the building. 2nd, the stylobate of Daeungbojeon Hall is the only and unique case that Guibu was supported by the bottom. Such stylobate was estimated to be built in the early period of Goryeo stylobate of PostLintel Construction which was more simplified than that of the traditional unified Silla period considering specific techniques. Lastly, by means of comparison of the architectural technique of Daeungbojeon Hall of Bulyeongsa Temple with other temples in Gyeongsang-do Province, the characteristics of the building were found. In particular, the same architectural technique was confirmed by direct comparison of style with Yeongsanjeon Hall of Tongdosa Temple in 1714 which was constructed by the same architect.