• The Journal of the Korea Contents Association
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• v.21 no.10
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• pp.240-263
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• 2021

A study on the public design rules of the government and each local government showed that the historical and cultural street landscape was included in the public design field, but it did not provide a clear evaluation index for the historical and cultural street public design. Against this background, this study intends to provide basic data for the improvement and improvement of the public design of the historical and cultural street in the future by producing an evaluation index for the public design of the historical and cultural street landscape. First, in this study, 6 evaluation indicators and 19 detailed items were derived by conducting expert Delphi survey twice on the basis of previous studies. Second, exploratory factor analysis and AHP analysis were conducted through a survey to verify the validity of the evaluation index and the priority of the index items, and as a result of the analysis, the Cronbach'α coefficient and the consistency ratio were verified. Among the evaluation indicators objectively derived through the above method, the priority was 'historical and culture-related> public-related> safety-related> accessibility-related> lasting-related> related to aesthetic harmony. The results of this study are meaningful in that they can provide basic data for the improvement and improvement of public design of historical and cultural streets in the future.

• Structural Engineering and Mechanics
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• v.17 no.3_4
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• pp.331-346
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• 2004

A new sensor system is proposed for measuring damage indexes. The damage index is a physical value that is well correlated to a critical damage in a device or a structure. The mechanism proposed here utilizes elastic buckling of a thin wire and does not require any external power supply for memorizing the index. The mechanisms to detect peak strain, peak displacement, peak acceleration and cumulative deformation as examples of damage indexes are presented. Furthermore, passive and active wireless data retrieval mechanisms using electromagnetic induction are proposed. The passive wireless system is achieved by forming a closed LC circuit to oscillate at its natural frequency. The active wireless sensor can transmit the data much further than the passive system at the sacrifice of slightly complicated electric circuit for the sensor. For wireless data retrieval, no wire is needed for the sensor to supply electrical power. For the active system, electrical power is supplied to the sensor by radio waves emitted from the retrieval system. Thus, external power supply is only needed for the retrieval system when the retrieval becomes necessary. Theoretical and experimental studies to show excellent performance of the proposed sensor are presented. Finally, a prototype damage index sensor installed into a 7 storey base-isolated building is explained.

• Korean Journal of Computational Design and Engineering
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• v.16 no.5
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• pp.380-389
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• 2011

Esthetic appeal of a product is often affected by the appearance quality of seams forming between components of the product. The appearance quality of seams is, however, assessed in a very subjective and qualitative manner that heavily depends on the evaluator. This paper presents a preliminary study to quantify such assessment by formulating a quantitative index which is a linear function of the seam gap sizes, seam gap ranges, and the size uniformity of seam gaps. By considering a highly simplified problem of a drawer system and utilizing subjective assessments by twenty evaluators, the index has been formulated. The validity of this index has been confirmed by observing its behavior with changes of the component tolerances. Also, the utility of this index has been demonstrated through a selective assembly scheme applied to the drawer system problem. Though the index formulated in this study for seam appearance quality may be useful, future studies are necessary to make the model readily applicable to real problems.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.16 no.5 s.110
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• pp.457-469
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• 2006

In automotive engineering, the brand sound is one of the important advantage strategies in a car company. For the design of brand sound, the selection of descriptive word for a car sound is one of major works in automotive sound quality research. In this paper, booming and rumbling sound, which are professional words used by sound and vibration engineers are used for the design of brand sound. We employed sound quality metrics, which are used in the psychoacoustics. By most research results, the relationship between subjective evaluations and sound quality metrics has nonlinear characteristics. In order to correlate these subjective evaluations with sound quality metrics, the artificial neural network technology has been applied to two-dimensional sound quality index for a passenger car. These indexes are used for 46 passenger cars, which are samples of the famous cars around the world. Also a preference evaluation for car sound was carried out by sound and vibration engineers. We coupled this preference with booming and rumbling sounds by using artificial neural network. In future, the two dimensional sound and preference index will be very useful to develop brand sound in passenger cars.

• Journal of dental hygiene science
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• v.12 no.5
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• pp.511-515
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• 2012

The aim of this study was to investigate the effects of dental plaque control depending on the detergent foods. Study design was a nonequivalent control group design. Study subjects were 14 males (38.8%) and 22 females (61.1%), the age of 20.6 years old. It was conducted from March 7 to June 13, 2012. The Patient Hygiene Performance index (PHP index) was measured as a dependent variable. Detergent foods were cucumber, pear, carrot, and peach. The PHP index of detergents foods were compared using ANOVA. Paired t-test was performed. SPSS ver. 18.0 was used for the data analysis. All detergent foods which cucumber ($2.85{\pm}1.01$), pear ($2.82{\pm}0.93$), peach ($2.48{\pm}1.12$), and carrot ($2.75{\pm}0.68$) was a significant decrease in plaque index (p<0.05). However, there was no significant difference among detergent foods. Detergent foods are effective in dental plaque control. However, no difference was shown depending on the detergent foods.

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.7
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• pp.784-791
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• 2013

Recent advanced IT made layout design fast and accurate by using algorithms. Layout design should be determined by considering the position of equipment with satisfying various space constraints and its component works with optimum performance. Especially, engine room layout design is performed with mother ship data, theoretical optimal solution, design requirements and several design constraints in initial design stage. Piping design is affected by position of equipment seriously. Piping design depends on experience of designer. And also piping designer should consider correlation of equipment and efficiency of space. In this study, space evaluation method has been used to evaluate efficiency of space. And also this study suggested object function for optimal piping route, Average Reservation Index(ARI), Estimated Piping Productivity(EPP) and with modified space evaluation method. In this study, optimum pipe routing system has been developed to reflect automated piping route with space efficiency and experience of piping designer. Engine room is applied to the design of the piping in order to confirm validity of the developed system.

• Journal of Korean society of Dental Hygiene
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• v.15 no.4
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• pp.555-563
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• 2015

Objectives: The purpose of the study is to investigate the effect of oral health education for the elderly using $Qscan^{TM}$. Methods: This study was a quasi-experiment design of nonequivalent control group pretest-posttest design carried out by oral health education from January 17 to March 7, 2015. The subjects were 64 elderly people over 65 years old who had more than one remaining teeth in the anterior teeth and canines living in Hongseong-gun and assigned to 33 control group and 31 intervention group. The intervention group was measured only by $Qscan^{TM}$. The educational effect between two groups were evaluated using oral health behavior, gingivitis index, and plaque index. After Institutional Review Board from Namseoul N University, the elderly people participated in the study. Results: The intervention group showed lower plaque index of percent reduction than the control group. The two groups showed a significant difference in gingival index after the oral health education(p<0.05), but did not show a significant difference in oral health behavior after the oral health education(p<0.05). Conclusions: The effect of oral health education through the motivation of $Qscan^{TM}$ was very effective in the comparison of oral health behavior, gingival index and plaque index.

• Korean Institute of Interior Design Journal
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• v.20 no.2
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• pp.72-84
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• 2011

In accordance with an active development, we now enjoy web 2.0 generation centering bilateral participation through the web 1.0 environment mainly providing the offering information and take a step web 3.0 understanding information by itself. The same time of digital technic development, consumption market arrived at market3.0 generation, also passed by market 1.0 and went via market 2.0 based on bilateral participation and understanding. This change have the marketing implement index changed as well. Nowadays, 7C is generalized of making up sensibility, emotion, communication, relationship, customization and interactive built as a major strategy from the day of 3p focused on customer environment, service process and 4P focused on physical quality of product. It isn't that brand and merchandise create life and experience like as past. It is focused on embodiment of a way of life, culture and creative experience from consumers' own. This treatise, therefore, fixes the object as flagship store positively reflecting the change and examine the change of a marketing code element and social factor stimulating customer behavior change. As a condition of this study, It fixes Maslow Motivation Theory as the main index of customer behavior, and 7C as the marketing code. This treatise ultimately studies the index of flagship store discussion based on domestic outdoor brand cases.

• Explosives and Blasting
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• v.23 no.3
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• pp.75-82
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• 2005

Many blasting engineers develope their own approach to define how to blast different rockmass properties. The problem is that most of these approaches haven't been formalized in any systematic manner and they depend mainly on casual observation of local conditions by an experienced blaster. In this paper blastability index developed by Lilly is adopted to induce powder factor for blast design considering local conditions. With this approach blastability scheme can be considered joint properties as well as rockmass represented local conditions. This approach is also expected to supplement the shortcomings of existing blast design approaches.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.32 no.6
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• pp.458-464
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• 2020

Calibration of load-resistance factors for the limit state design of perforated caisson breakwaters are presented. Reliability analysis of 12 breakwaters in nationwide ports was conducted. Then, partial safety factors and load-resistance factors were sequentially calculated according to target reliability index. Load resistance factors were optimized to give one set of factor for limit state design of breakwater. The breakwaters were redesigned by using the optimal load resistance factor and verified whether reliability indices larger than the target value. Finally, some load-resistance factors were proposed by changing target reliability index.