• Journal of Radiation Protection and Research
• /
• v.37 no.1
• /
• pp.10-15
• /
• 2012

Design and performance test results of a newly developed optically stimulated luminescence (OSL) measurement system are presented in this paper. Generally, different types of optical filters are used in OSL reader system to minimize the interference of the stimulation light in the OSL signal. For optically stimulation of $Al_2O_3:C$, we have arrived at an optimal combination of the filters, i.e., GG420 filter for filtering the stimulating light source, and a combined UG11 and BG39 filter at the detecting window (PMT). By using a high luminance blue LED (Luxeon V), sufficient luminous intensity could be obtained for optically stimulation. By using various control boards, the OSL reader device was successfully interfaced with a personal computer. A software was developed to deliver required commands to operate the OSL reader by using the LabView program (National Instruments, Inc.). In order to evaluate the reliability and the reproducibility of newly designed-OSL reader. Performance testing of the OSL reader was carried out for OSL efficiency, OSL decay curve and signal to noise ratio of the standard $Al_2O_3:C$ OSL material. It was found to be comparable with that of commercial Riso reader system.

• The Journal of Korean Academy of Prosthodontics
• /
• v.42 no.4
• /
• pp.458-470
• /
• 2004

Statement of problem: Br${\aa}$nemark or ITI are two currently most widely used implant systems but with contrasting design, surgical and restoration methods. Purpose: The purpose of this study was to compare changes and its statistical significance in bone height and shape which may rise due to the differences between two implant systems. Also to analyse the effect of inter-implant distance on annual bone height changes. Material & Method: Those patients who were treated with two or more of either Br${\aa}$nemark or ITI implants at posterior mandibular area at Yonsei University Dental Hospital, Implant Clinic were selected. At annual examination appointments, standardised radiographs using parallel technique were taken. Marginal bone and inter-implant crestal bone changes were measured and following results were obtained. Results: 1) When ITI and Br${\aa}$nemark system were compared, both annual marginal and inter-implant crestal bone height changes in ITI system in the first two years were smaller than Br${\aa}$nemark and they were statistically significant. On the third year, however, there was no statistical difference between two implant systems on their annual bone level changes (p>0.05). 2) The Marginal and inter-implant crestal bone changes were compared when inter-implant distance was less than 4mm. Statistically significant bone level changes were noted on the first year only for ITI implants but in the first and second year for Br${\aa}$nemark implants (p>0.05). 3) When comparing angulation changes between marginal bone and implant fixture, ITI system had smaller angulation changes but the annual changes were not statistically significant (p>0.05). Conclusion: Within the limitation of this study, it could be concluded that Br${\aa}$nemark implant systems had more changes in marginal and inter-implant crestal bone level in the first and second year after loading with statistical significance. Further studies are recommended to see the effects of these bone loss during the first and second year after loading on the long term prognosis of Br${\aa}$nemark Implants.

• The Journal of Korean Academy of Prosthodontics
• /
• v.44 no.5
• /
• pp.654-664
• /
• 2006

Statement of problem: There has been a eat interest in the use of titanium for fixed and removable prostheses in recent because of its excellent biocompatibility. However, the melting temperature and chemical reactivity of titanium necessities casting system different from those used in conventional casting. The current titanium casting systems are based on an electric-arc design for melting the metal in an argon atmosphere and its exclusive investment. Despite the new development in Ti casting system, inadequate mold filling and internal porosity are frequently observed casting defects. Purpose : The purposes of this study were to compare the castibility and reaction layer of the casting titanium under the two casting machines and their investment condition. Material and method: coping and machine-milled titanium coping according to the casting methods and the marginal configurations. The total 28 specimens were used, and these are divided into 4 groups according to 2 casting machines and 2 investments. The castings were analyzed using x-ray microanalysis and microhardness testing. The reaction layer between margin of titanium casting and the investments was observed and analyzed with scanning electron microscope. Result: 1. Castabiliy of casting titanium specimen was best in the group of centrifugal casting machine and Selevest $CB^{\circledR}$ and good that of Selevest CB and pressure differential casting machine, Rematitan plus and centrifugal casting machine, Rematitan plus and pressure differential casting machine in order. 2. There was no significanct correlation in titanium castability in respect of casting machine. However ANOVA indicated that Selevest $CB^{\circledR}$ groups had significantly better castability than Rematitan $plus^{\circledR}$ groups.(p<0.05) 3. There was a significant microhardness difference between centrifugal casting machine groups and pressure differential groups.(p<0.05) Titanium castings in centifugal groups had significantly harder than those in pressure differential groups. 4. The addition of zirconia decreased interfacial reactivity. Conclusion: above result revealed that of the castability of titanium casting specimens had little correlation in casting machines and was better in magnesia-based investment contained ZrO2 groups. However in order to practice casting titanium in clininic, its castability should be improved, also there should be more research on factor of castability so that long-span prothesis and removable partial denture metla frame may be casted completly.

• Journal of the Korean Society of Costume
• /
• v.19
• /
• pp.209-240
• /
• 1992

The costume of any nation is an attribute of a culture. This study concerns chinese and Mongolian costume's 'collar' form according to the observation of some reports about import folk materials and the pictures of the genuine objects, the author has investigated and rearranged them focusing on 13th Century's. 1. Traditional OverCoat or National costume on the poing of won dynasty in china such as Jacket, Coat, Mantle for making classical matching color, lacing, pearl pieces, and all costume shall be properly decorated and disigned. The example, Chinese Women's Gown and Double Jacket, on top of alignment of plaid, focus shall be placed on chinese classical form and color-matching, such as flowers and bireds, butterflies, made wishing ornaments, which shall be either hand painted or embroidered on collars, fronts, sleeves openings, and lower portion of gown. 2. Mongolian Costume, the stone status of a person, are seen at the territory of the Republic of Mongolia was a powerful country of Asia. So during the Mongolian Empire a lot of Missions from many countries came to kharakorom for establishing official relations between Mongolia and a country represented by mission. In particularly, the costume of mongols on the point of Chinggis khan Empire which the upper clothes in cluded ; a several kinds of the Caftan as compared with in Korea as to material (Silk caftan, Cotton Caftan, Fur Caftan) with closing to the right due to overlapping and Stand-up-Shawl Collars will pancho style & Round or V Neckline. 3. As compared with in Korea it is said that this a sort of Simui was brought in prior to the middle of Koryeo dynasty. Korean Simui system was complied with chinese system through confucian domestic behaviour. This was respected for court dress of confucian scholars, as it was, Chumri can ordinary dress of schloars) and Hakchangui ( a uniform of confucian student). Generally its form or shape of the outer lapels of Korean jacket were used together Squar-Tray-Collar. In late Yi-dynasty the inside collar length was longer than the outside collar length and the width of the collar was gradually narrow. And so the Traditional costume's outer collar of Jacket and OverCoat became small while the width and length of breast-tie became large. The same thing as the form of the collar on these days had been appeared by the design method or adjust one's dress. Therefore the form of collar in the china and Mongolian Traditional OverCoat & National Costume is fix arranged according to Stand up Collar, Without Collar, Clothing to the Right, Central opening, Horizontal Row of Button with Round or V Neckline and so on.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.34 no.6
• /
• pp.731-742
• /
• 2010

Modeling of rubber for design or analysis often requires confusing or complex work because there are a large number of constitutive models to be considered. Some models have few material constants, while others have many. Researchers have to prepare and fit extensive experimental data with caution and discretion. In this paper, we first compared some typical rubber models in which deformation was carried out by stretching up to around eight times the original size. We conclude that continuum-based models and chain molecular models can be used in the study of the small deformation in most engineering applications, but chain molecular models are preferred in the study of the large deformations in most biomaterial applications. As discrimination problems, Treloar's patch and cylindrical balloon stick are tested theoretically and numerically for studying bifurcation. In the case of Treloar's patch, by using the Kearsley's equation, we show that bifurcation exists for continuum-based models but not for chain molecular models. Both models show bifurcation in the cylindrical balloon stick. Therefore, in the analysis of the bifurcation of rubber showed that its existence also depends on the constitutive model selected.

• Journal of the Korean Society of Costume
• /
• v.25
• /
• pp.249-268
• /
• 1995

Parody has recently prevailed as one of the important techniques of creation in art. The purposes of this study are to reaffirm the pos-ition of fashion as an art by clarifying parody depicted in fashion and to make an opportunity to reconsider the meaning of creation in fashion design through the significance of par-ody. For these purposes, documentary studies about parody in literature and art which had been discussed more often were preceded as a framework of this research. framework of this research. Basedd upon that, parody phenomena in fashion as well as art were analyzed. The synthetic results are as follows ; 1. Parody is a kind or critical technique and can be conceived as a process of creation. The established primary style (material) which is well-known and familiar is imitated and then is recreated in new manner through the three types of parodization, that is, the change of its external form, the change of its internal mean-ing and the shift from its place (i.e. displace-ment). 2. Parody in fashion is also analyzed based upon the three types of parodization which designer's will and expression is necessarily required. First, the parody through the change of external form is to have its effect of novelty, unexpectedness, playfulness, wit, mackery, satire, irony, paradox by changing the form of the original through imitation with similarity, transformation, exaggeration, em-phasis. Second, the parody through the change of internal meaning is to bring about paradox, irony, contempt, satire, unex-pectedness by applying the original to inappro-priate subject through its substitution, inver-sion. Third, the parody through displacement is to pursue a jarring incongruity that results from shifting the original to other context. Its effect consists of paradox, unexpectedness, playfulness, ridicule, mockery, satire, irony. In general, the parody technique in fashion can be used to have an intention of expressing seriousness, playfulness, satire, grotesque. The representative designers using the parody technique are Lagerfeld, Ricci, YSL, Yama-moto, Castelbajac, Gaultier, Mugler, West-sood, Steiner and so on. 3. Parody is the technique which imitates and then recreates the preceding style ; is at the same time the method which challenges the existing concept of originality-singleness and uniqueness. It reflects the more flexible concept of modern creation in art as well as fashion. The imitation as the creation, the characteristic of parody is recognized as an creative expressiveness, publicity, intention. Thus it differenciates from copy which is uncritical mimicry.

• Journal of the Korean Society of Costume
• /
• v.58 no.7
• /
• pp.76-91
• /
• 2008

The purpose of this study is to prescribe formative perspectives as a framework where the aesthetic taste and demands of a certain period are embodied and to develop new analytical tools to examine the beauty of dress in terms of form. First, the theoretical tools selected for this study are Heinrich Wolfflin's formative perspective theory derived from art and Marilyn R. DeLong's framework for visual analysis of dress. Second, several issues that limited the development of a new framework for analyzing the form of dress were identified and addressed. Third, the selected aspects of dress form to be analyzed are specified. They are: silhouette, inner form, structure form, materials and patterns based upon the relationship between the body, dress and space in order to develop new formative perspectives. Based upon these theories a new framework for analyzing dress aesthetics in terms of form is developed. This reconstructed framework consists of three sets of antagonistic representational styles: closed form/open form, linear form/painterly form and multiplicity/unity. Closed form/open form represented in dress can be classified by the clear or obscure silhouette shown not only in the relationship between the dress and space around the dress, but also from changeability or invariability of dress in relation to the body. The material, pattern and various design elements are used as the central criteria to determine the linear/painterly characteristics in dress representations. Finally, the multiplicity/unity can be found in the relationship between the whole and the parts. Multiplicity is represented in dress when the parts have a visual priority over the whole, whereas unity is represented when a dress as a whole has visual priority over the parts. A dress represented with closed form, linear characteristic and multiplicity is perceived as a clear form. In contrast, a dress with open form, painterly characteristic and unity is understood to be an obscure form. It can be said that this study is the first attempt to establish the formative perspectives for analyzing the form of dress in various periods, cultures and races for the future studies.

• Fashion & Textile Research Journal
• /
• v.9 no.2
• /
• pp.176-187
• /
• 2007

Buddhist paintings in the late Joseon dynasty are characterized by diversification and subdivision of subject matters. Buddhist paintings rapidly declined since 19th century, being miniaturized and showing complicated composition. Figures that identified the shape of shoes in Buddhist paintings of late Joseon dynasty included sacheonwang that were placed in the left and right bottom of Buddhist paintings, sinjung, gwiwang and pan-gwan of siwangtaeng. Sacheonwang, an Indian folk god, was depicted as a noble person in "ahamgyeong", an early sutra, but was depicted as an armored warrior in Mahayana Buddhism world. The style of shoes sacheonwang in Korea were different depending on the times. The shoes of the sacheonwang sculpture in Seogguram of Shilla dynasty are sandal type. The sacheonwang that was drawn on Jijangbosaldo in Goryeo dynasty wears non-showy armor and red yi(履). The sacheonwang that was expressed on Buddhist paintings in Joseon dynasty wears showy armor and decorated hwa. Comparing the yi of Goryeo Jijangbosaldo sacheonwang with the yi of Bodhisattva on the Dunhuang yeolbanbyeonsangdo, Jijangbosaldo sacheonwang's shoes are Korean style in which the sole is flat and the front part has no decoration, but in the shoes of Bodhisattva on the Dunhuang yeolbanbyeonsangdo the sole is not flat, the front part is lifted. The style of shoes of pan-gwan, who is depicted on Siwangtaeng, is hwa. However, unlike the decorative hwa of sacheonwang, its front is not lifted and it has no decoration. It is assumed that the shoes of sacheonwang or pan-gwan represented obangsaek based on the idea of eumyang-ohaeng. Depiction of shoes shown in Buddhist paintings reflected the phases of the social life. In addition, the sandals of Shilla sacheonwang implies that sourthern culture in addition to Buddhism was introduced. Having expressed the shoes of Goryeo sacheonwang with conventional yi implies that Buddhism governed the inner world of the people, and the shape and material of the shoes reveals aristocracy. It is assumed that that an armored warrior wore yi, not hwa implies that the then society was stable. Also, it is assumed that that the shoes of sacheonwang on Buddhist paintings in Joseon dynasty were hwa implies that the role of tutelary god was stressed in the disordered society.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.33 no.4
• /
• pp.1665-1673
• /
• 2013

Recently, the interest and demand on free formed structure providing aesthetic value as well as functionality has been increasing. Formwork has numerous advantages such as high strength, convenience, accuracy and good quality of surface roughness. Nevertheless, it increases construction cost and period to build complex shapes. For these purpose, deposition construction systems such as Contour Crafting and Concrete Printing have been developed with active collaboration between university and industry by applying the rapid prototyping technology to the construction industry in USA and England. Since there has been no related research in Korea, the possibility of spin-off technology and its fusion cannot be expected. In this paper, design elements including mechanical system and control system related to automatic deposition construction system prototype for constructing a free curved structure without mold are described. As for an appropriate material for the system, fiber reinforced mortar was selected by experiments on compressive strength, fluidity, viscosity and setting time. By performing transfer and extrusion experiments, the possibility of the development of deposition construction system was demonstrated. Based on this research results, it is required to keep the automatic deposition construction system improve and extend it into the new application area in construction industry.

• Asian-Australasian Journal of Animal Sciences
• /
• v.19 no.10
• /
• pp.1429-1436
• /
• 2006

Fermentation characteristics, nutrient retention and aerobic stability of barley silages prepared using 6 commercial inoculants were evaluated using 126 mini-silos (3-L) in a completely randomized design. Whole barley forage was chopped, wilted to 39% DM and treated with water (control, S) or one of six inoculants: A (containing Lactobacillus plantarum); B (L. plantarum and Enterococcus faecium); C (L. plantarum and Pediococcus cerevisiae); D (L. plantarum, Pediococcus pentosaceus and Propionibacterium freudenreichii, plus hydrolytic enzymes); E (Lactobacillus buchneri plus hydrolytic enzymes); F (L. buchneri and P. pentosaceus plus hydrolytic enzymes). Samples of treated forage were collected for analysis at the time of ensiling, and then 18 silos of each treatment were filled, capped and weighed. Triplicate silos were weighed and opened after 1, 3, 5, 7, 33, and 61 d. On d 61, $400{\pm}5g$ of material from each silo was placed in 1-L styrofoam containers, covered with cheesecloth and held at room temperature. Silage temperature was recorded hourly for 14 d via implanted thermocouple probes. Chemical composition of the forage at ensiling was consistent with previously reported values. At d 61, pH was lowest (p<0.01) in silage S. Ammonia-N was lower (p<0.05) in silage A than in silages S, B, E, or F. Compared to pre-ensiling values, water soluble carbohydrate concentrations were elevated in silages S, A, B, C and D, and decreased in E and F. Lactic acid concentrations were similar (p>0.10) across treatments. Acetic acid levels were highest (p<0.01) in silage E and lowest (p<0.01) in silage D. Recovery of DM was lower (p<0.01) in silage F than in silages S, A, B, C, or D. On d 61, yeasts were most numerous (p<0.01) in silage D, which was the only silage in which temperature rose more than $2^{\circ}C$ above ambient during aerobic exposure. Silage D also had the highest (p<0.01) pH and ADIN content after aerobic exposure. Lactic acid and WSC content of silage D decreased dramatically during the 14-d aerobic exposure period. Yeast counts (at d 14 of exposure) were lowest (p<0.01) in silages E and F. In general, the commercial inoculants did not appear to enhance the fermentation of barley silage to any appreciable extent in laboratory silos.