• Archives of design research
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• v.18 no.2 s.60
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• pp.173-188
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• 2005

Design has become a buzzword in the marketing community these days and has been considered as an important success factor for business. Unfortunately, however, little research to date has been conducted on consumer responses to brand logo designs, which visualize brand identities. This article reports the findings from an experimental study which examined consumer evaluations of logo designs through conjoint analysis. The study explored potential factors which would give rise to the differences of consumer preferences. The results indicate that in the case of cognitive brand concepts, search goods show high elaborateness and low symmetry, experience goods show high associativeness, and credence goods show low elaborateness and high symmetry in the logo design characteristics. Affective brand concepts reveal different results in the logo design characteristics: search goods indicate high elaborateness and low associativeness, experience goods show low naturalness, and credence goods show low elaborateness and high associativeness. Implications of the results are discussed from a theoretical and practical standpoint.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.6
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• pp.110-116
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• 2004

In this study, a three-dimensional finite-element analysis code has been developed to predict acoustic behaviors in rocket combustion chambers and to quantitatively evaluate acoustic stability margins for various designs with passive stabilization devices such as baffle and acoustic resonators. As a validation case, computations are made for combustion chambers with/without a hub-and-six-blade baffle which are developed in the KSR-III Development Program. Compared with experimental results from ambient acoustic test, the numerical approach reasonably well predicts acoustic pressure responses to acoustic oscillation excitation for both unbaffled and baffled combustion chambers and yields quantitatively good agreement for acoustic damping effects of baffle installation in terms of damping factor ratio and resonant frequency shift.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.37 no.2
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• pp.75-82
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• 2000

In this Paper, a new type of feedforward linearizer using a delay line which controls the phase characteristics of the correction amplifier block is proposed. The extra delay line provides the control-ability of IM signals so that the IM rejection is accomplished without the conventional pilot tone. The error signal loop consists of several key components such as phase shifter and attenuator, subtractor. These key components are replaced by new designs in order to obtain better linearization characteristics without the pilot tone generator which is indispensable in the conventional linearizer designs. The proposed linearizer was designed at Korean PCS band and combined with 35W HPA manufactured by KMW inc., and tested with two-tone signals separated 0.6MHz apart at the center frequency of 1855MHz. The experimental results show C/l improvement by 16.9 ~ 24.6 dB over 15 dB dynamic range(30 ~45 dBm) which gave IMD of 58.5~63.2 dBc for the designed LPA.

• Journal of Dental Rehabilitation and Applied Science
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• v.22 no.2
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• pp.111-123
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• 2006

A Study on the Fracture Strength of All-Ceramic Crown according to the Zirconia Coping Design using CAD/CAM System L. Bulgan, In-Ho Cho, Soo-Yeon Shin Department of Prosthodontics, Graduate School, Dankook University The fracture strength of prosthesis is important, because it affects the function, and long term success of prosthesis and teeth. The purpose of this study was to compare the fracture strength of zirconia coping designs. Experimental test group were classified into three designs according to coping design, Modified design: Zirconia coping margin was located at 1mm above the axiogingival line angle. Collarless design: The coping margin terminated at the axiogingival line angle Butt design: The coping margin was extended to the finishing line of prepared margin. A $Cercon^{(R)}$(Degussa, Germany) CAD/CAM system was used to make the zirconia coping. Fracture strength was measured using loading machine at a cross head speed of 1mm/min. The results were statistically analyzed using the one-way ANOVA and multiple comparison test. Statistical significance was set in advance at the probability level of less than 0.05. The result : I. Collarless($738N{\pm}155N$) and Modified($755N{\pm}185N$) groups showed significantly a lower fracture strength than Butt($1057N{\pm}262N$) group(p<0.05). II. There were no statistical differences of the fracture strength between Modified($755N{\pm}185N$) and Collarless($738N{\pm}155N$) groups. III. When comparing the fractured surface, all the group showed porcelain fracture, which were fractured at the labial surface of baked porcelain The butt design of the zirconia coping has higher fracture strength than modified and collarless design.

• Journal of the Korean Geosynthetics Society
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• v.15 no.4
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• pp.53-62
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• 2016

This paper presents the results of a reduced-scale physical model investigation into the effect of drilling fluid with different mix designs for use in offshore bore hole collapse prevention. Compare the bentonite and Attapulgite use. Reduced-scale model tests were then carried out considering field procedures for cases with decomposed granitic soil with fines and a sand with various drilling fluids with different mix designs. The results were indicated that the addition of polymer to the bentonite based drilling fluid decreases the amount of injected drilling fluid and increases the final depth of excavation. Also revealed that the effect of polymer on the performance of drilling fluid is more pronounced in the decomposed granite soil with fines than sand. Practical implications of the findings from this study are discussed in detail.

• The Research Journal of the Costume Culture
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• v.25 no.6
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• pp.787-803
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• 2017

The purpose of this study is to reestablish the innovative and experimental designs of Rei Kawakubo by considering and analyzing the flow on the avant-garde nature of her design collection from 1981 to 2017. Design trends such as the art trend, silhouette, color, and expressive technique showcased in Rei Kawakubo's collection from 1981 spring/summer to 2017 spring/summer were examined through precedent studies, books, internet materials, and the avant-garde expressive nature of her designs appearing in modern fashion. Additionally, this study considers the definition of avant- garde and analyzes the expressive nature of Rei Kawakubo's 137 works from the Comme des Garcons collection, exhibited in New York's Metropolitan Museum of Art. As a result of this examination, the avant-garde expressive nature seen in modern fashion was classified into the following themes: historicity, de-structure, exaggeration, intermixture, and surrealism. As a result of reclassifying these characteristics according to historical flow, the historicty, intermixture, and de-structure appeared in the 1980s, while intermixture, exaggeration, and de-structure appeared in the 1990s. More recently, historicity, intermixture, and de-structure appeared in the 2000s, and intermixture, de-structure, exaggeration, and surrealism appeared in the 2010s. The present study is significant in providing theoretical material for the more innovative and various design development in diverse domains while helping to define and understand the avant-garde expression through Rei Kawakubo's collection.

• Restorative Dentistry and Endodontics
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• v.12 no.1
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• pp.107-116
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• 1986

The primary aim of this study was to assess the effects of the margin designs and composite resins on the marginal leakage of Class V resin restorations. 60 Class V cavities with $90^{\circ}$ butt joint, 60 with $45^{\circ}$ bevel joint, and 60 with concave joint were prepared on the labial surfaces of 38 extracted anterior teeth and the buccal and lingual surfaces of 71 premolars, and classified as the butt group, bevel group and concave group, respectively. After completion of the cavity preparation, Heliosit${(R)}$ was filled in 20 butt joint cavities, 20 bevel joint cavities, and 20 concave cavities. And Hi-Pol$^{(R)}$ and Palfique$^{(R)}$ were filled in the same manner, respectively. After finishing, all specimens were subjected manually to 50 thermal cycles at $4^{\circ}C$, $37^{\circ}C$, and $60^{\circ}C$. They were immersed in 0.5% methylene blue solution for 24 hours, and buccolingually sectioned with sectioning machine. The sectioned specimens were examined under the light microscope. The results indicated the following: 1. The bevel group showed the least amount of marginal leakage compared with the other two design groups, but the statistical analysis showed no significant difference at the 95% confidence level. 2. Hi-Pol$^{(R)}$ group showed the most severe marginal leakage compared with the other composite resin materials, but there was no significant difference in the groups. 3. The bevel-Heliosit$^{(R)}$ subgroup, which was filled with Heliosit$^{(R)}$ in the beveled cavities, showed the least amount of marginal leakage, but there was no significance in all the subgroups.

• Advances in concrete construction
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• v.8 no.3
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• pp.225-237
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• 2019

Although applying self-consolidating concrete (SCC) in many modern structures is an inevitable fact, the high consumption of cement in its mixing designs has led to increased production costs and adverse environmental effects. In order to find economically viable sources with environmentally friendly features, natural pozzolan pumice and blast furnace slag in 10-50% of replacement binary designs have been investigated for experiments on the properties of fresh concrete, mechanical properties, and durability. As a natural pozzolan, pumice does not require advanced equipment to prepare for consumption and only needs to be powdered. Pumice has been the main focus of this research because of simple preparation. Also to validate the results, in addition to the control specimens of each design, fly ash as a known powder has been evaluated. Moreover, ternary mixes of pumice and silica fume were investigated to enhance the obtained results of binary mixes. It was concluded that pumice and slag powders indicated favorable performance in the high percentage of replacement.

• Smart Structures and Systems
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• v.24 no.4
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• pp.541-552
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• 2019

Construction development and greenhouse gas emissions have globally required a strategic management to take some steps to stain and maintain the environment. Nowadays, recycled aggregates, in particular ceramic waste, have been widely used in concrete structures due to the economic and environmentally friendly solution, requiring the knowledge of recycled concrete. Also, one of the materials used as a substitute for concrete cement is wollastonite mineral to decrease carbon dioxide (CO2) from the cement production process by reducing the concrete consumption in concrete. The purpose of this study is to investigate the effect of wollastonite on the mechanical properties and durability of conventional composite concrete, containing recycled aggregates such as compressive strength, tensile strength (Brazilian test), and durability to acidic environment. On the other hand, in order to determine the strength and durability of the concrete, 5 mixing designs including different wollastonite values and recovered aggregates including constant values have been compared to the water - cement ratio (w/c) constant in all designs. The experimental results have shown that design 5 (containing 40% wollastonite) shows only 6.1% decrease in compressive strength and 4.9% decrease in tensile strength compared to the control plane. Consequently, the use of wollastonite powder to the manufacturing of conventional structural concrete containing recycled ceramic aggregates, in addition to improving some of the properties of concrete are environmentally friendly solutions, providing natural recycling of materials.

• Journal of agricultural medicine and community health
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• v.48 no.2
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• pp.91-102
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• 2023

Objective: This study aimed to evaluate the effects of a digital group reminiscence program on elderly patients with mild dementia who were registered with Day Care Centers. Methods: The study was conducted with elderly patients with mild dementia in Day Care Centers in D city. The patients were randomly assigned to either the experimental group or the control group and were assessed for cognitive function, depression, and ego integrity using pre-test and post-test designs. A digital group reminiscence program was applied to the experimental group. Data was collected from July 5 to September 17, 2021, using questionnaires in three sessions. Results: The pre-test cognitive function score was 12.00 in the experimental group and 11.09 in the control group. The post-test cognitive function score was 19.20 in the experimental group and 14.42 in the control group. The later cognitive function score was 18.00 in the experimental group and 13.31 in the control group. The pre-test depression score was 8.32 in the experimental group and 9.91 in the control group. The post-test depression score was 6.05 in the experimental group and 8.82 in the control group. The later depression score was 6.94 in the experimental group and 9.02 in the control group. The pre-test ego integrity score was 41.39 in the experimental group and 39.55 in the control group. The post-test ego integrity score was 57.95 in the experimental group and 51.41 in the control group. The later ego integrity score was 55.88 in the experimental group and 42.15 in the control group. Cognitive function, depression, and ego integrity showed significant differences according to group (p<.05), time (p<.001), and interaction between group and time (p<.01). Conclusion: The digital group reminiscence program was found to be effective in improving cognitive function and ego integrity and reducing depression in elderly patients with mild dementia. Further research is needed to explore the effects of repetitive digital group recall programs based on the progress, course, age, and communication level of dementia.