• Journal of Korean Society of Steel Construction
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• v.13 no.5
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• pp.513-524
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• 2001

A total of nine H-shaped beams with web openings under cyclic loading condition were investigated. The dimension criteria are based on the formulae proposed by Darwin. The suitability of existing design formulae the effects of plastic hinge on beams with web openings the fracture around the web openings and the influence of cracks neighboring web openings to the beam strength under cyclic loading were also investigated through the observation of the behavior of these beams with various opening dimensions. locations numbers and spacing between the two openings.

• International Journal of Naval Architecture and Ocean Engineering
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• v.9 no.3
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• pp.246-255
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• 2017

The proposed design methodology represents a new approach to optimize the propeller-hull system simultaneously. In this paper, two objective functions are considered, the first objective function is Lifetime Fuel Consumption (LFC) and the other one is cost function including thrust, torque, open water and skew efficiencies. The variables of the propeller geometries (Z, EAR, P/D and D) and ship hull parameters (L/B, B/T, T and $C_B$) are considered to be optimized with cavitation, blades stress of propeller. The well-known evolutionary algorithm based on NSGA-II is employed to optimize a multi-objective problem, where the main propeller and hull dimensions are considered as design variables. The results are presented for a series 60 ship with B-series propeller. The results showed that the proposed method is an appropriate and effective approach for simultaneously propeller-hull system design and is able to minimize both of the objective functions significantly.

• Informatization Policy
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• v.21 no.4
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• pp.3-19
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• 2014

Crowd-funding platforms, which enable to collect funds from individuals, have recently gained growing interests around the world. This study intends to provide future research directions for the crowd-funding by reviewing past research works. For this purpose, two research themes are selected - (1) motivations to participate in crowd-funding and (2) critical success factors for the project funding. The motivations are analyzed from both perspectives of fund demanders and suppliers. The critical success factors are investigated by using four dimensions: fund demanders, fund suppliers, relationships between demanders and suppliers, and project characteristics. Using the implications found from the past research, this paper offers future research issues necessary for the growth of crowd-funding platforms.

• Journal of Technology Innovation
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• v.13 no.2
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• pp.45-70
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• 2005

Much work on innovation has focused on the manufacturing sector. In this paper, we propose a framework for analyzing innovation in services centred on capability and technology integration. We illustrate the theoretical points made by conducting a case study on an international telephone communications provider Brastel, which introduced significant innovations in international calling services, in the form of rechargeable pre-paid calling card, through effective application of standard IT. Brastel is situated against its main competitors, considering two dimensions of price and service breadth and convenience. A novel technique for measuring competitiveness based on price and service index is introduced. The following competitors were selected: NTT, KDDI, Japan Telecom, Fusion Communications, J-Call / World Link, G-Call, ASP Check, Primus, QuickPhone, and MCI. To create the service index, factors such as ease of use, convenience, number of languages in which the services are available, and additional features were taken into account. The company itself and the rechargeable card innovation were analyzed through in-depth interviews and data collection. It was shown that a competitive advantage was maintained through internal and external capabilities.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2003.10b
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• pp.26-30
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• 2003

Since the dimension of cold forged part is larger than the cavity size of forging die, the difference results from the various features, such as, the elastic characteristics of die and workpiece, thermal influences, and machine-elasticity. All of these factors should be considered to get more accurate prediction of the dimension of forged part. In this paper, severe FE techniques are proposed to improve the prediction accuracy of dimension for cold forged part. To validate the importance of the above mentioned factors, and the estimated results are compared with the experimental results. The used model is a closed die upsetting of cylindrical billet. The calculated dimensions are well coincided with .the measured values based on the proposed techniques. The proposed techniques have put two simple but important points into Fe simulation. One is the separation of forging stages into 3 steps, from a loading through punch retraction to ejecting stage. The other is the dimensional change, according to the temperature changes due to the deformation. The FE analysis could predict the dimension of cold forged part within the $10{\mu}m$, based on the more realistic consideration.

• Journal of the Ergonomics Society of Korea
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• v.22 no.3
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• pp.75-91
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• 2003

Evaluation of repetitiveness for hand-intensive tasks is essential to determine the level of risk for upper-extremity musculoskeletal disorders at the workplace. Many measures and methods have been introduced for repetitiveness assessment: however, our understanding of the differences among these measures and methods is lacking. The present study compared the repetitiveness measures and measurement/analysis methods to help practitioners apply the proper repetitiveness assessment methodology in the workplace. By reviewing 51 studies of repetitiveness assessment, measures and corresponding measurement/analysis methods were surveyed. Of the repetitiveness measures, two types of dimensions (frequency and time) and corresponding types of analysis scopes were identified. According to the dimensional and analysis-scope types. the repetitiveness measures were categorized and then the surveyed studies were counted for each measure. It is identified that frequency measures have used 2.7 times higher than time measures and the frequency of wrist motions has been most frequently used in repetitiveness assessment. Furthermore, the measurement methods were categorized into objective and subjective methods, and the analysis methods into statistical and spectral methods. Lastly, eight factors (accuracy, reliability. sensitivity. efficiency. ease of use. applicability. interference. and robustness) were listed to be considered in selecting the appropriate assessment methodology.

• The Journal of Fisheries Business Administration
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• v.40 no.3
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• pp.51-68
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• 2009

The purpose of this study is to investigate the effect of Brand Personality to Marine Tourism Destination Images and Intention to Recommend. For this purpose, factor analysis was applied to 42 of J.Aaker's Brand Personality Scale and 5 personality dimensions were extracted. This analysis was also applied for cognitive and affective images and two of cognitive images and three of affective images were extracted. Multiple regression was done to estimate the relative effects of Brand Personality to both cognitive and affective images and intention to recommend. The results indicated brand personality influenced on both cognitive and affective images and intention to recommend directly and also found affective images was influenced by cognitive images. The results also suggested useful insight for future study. The Brand Personality Scale which developed for the product by Aaker might not be suitable for measuring the marine tourism destination brand personality and necessary to develop the new scale suitable for marine tourism destination personality, and be needed to study together with other moderating variance such as satisfaction and congruency with image to verifying the exact effect between different variables.

• Journal of architectural history
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• v.7 no.4 s.17
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• pp.151-163
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• 1998

This Study is concerned with the color design of Korean and Japanese wooden architecture. The main subject of the study is to investigate the commonness and difference of color decoration between Korean and Japanese Buddhist 'Danchung' in the modern ages. In carrying this study into execution, I examined the architectural and historical backgrounds, and analysed the elements, techniques and principles of color design. The result of this study is as follows ; 1. 'Danchung' was originated from the practical functions in Chinese wooden architecture, and developed to embody sensuous beauty in Buddhist temple. The techniques and principles of color design and color tone of Korean and japanese Danchung had been similar in the ancient ages. But little by little they have differed in its function and color tone. So they are very different in modern times. 2. The dominant colors of Korean Danchung are red and green as 'Sang-nok Ha-dan(上綠下丹)', but Japanese's is only red as 'Bak-gan Juk-sun(白間赤線)' 3. Korean Danchung expresses and accentuates the important structural elements in three dimensions, on the other hand japanese Danchung takes two dimensional decoration on the unstructural elements 4. When seen in general, in Korean Danchung colors and their light and shade are simple and patternized. In the meantime, Japanese Danchung has many configurational expressions in general and is closed to paintings or picture.

• Journal of Magnetics
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• v.15 no.3
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• pp.116-122
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• 2010

An accurate analytical equation for the total energy in the framework of the single domain model is used to study the thermal stability of nanostructured synthetic ferrimagnets. Elliptical cells are considered that have lateral dimensions of 160 nm (long axis)$\times$80 nm (short axis) and varying values of thickness asymmetry for the two magnetic layers. The direction of the applied magnetic field, which points to the $45^{\circ}$ direction, is in the opposite direction to the thicker layer magnetization. A significant difference is observed in the applied magnetic field dependencies of the equilibrium magnetic configuration and the magnetic energy barrier when using the simplifying assumption that the self-demagnetizing field is identical in magnitude to the dipole field. At a small thickness asymmetry of 0.2 nm, for example, the magnetic energy barrier is reduced from 68 kT (T=300 K) to 6 kT at the remanent state and a progressive switching behavior changes into a critical behavior, as the simplifying assumption is used. The present results clearly demonstrate the need for an accurate analytical equation for the total energy in predicting the thermal stability of nanostructured synthetic ferrimagnets.

• Journal of Forest and Environmental Science
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• v.30 no.2
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• pp.226-232
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• 2014

To understand transition characteristics from wood to charcoal the dimensional changes of carbonized woods at low temperature from $300^{\circ}C$ to $350^{\circ}C$ at the intervals of $10^{\circ}C$ were investigated. Three species of hardwoods and two species of softwoods were used in this study. Measurements of dimensional changes of cells were observed by stereoscopic microscope and an image analyzer. The apparent volume of each specimen decreased greatly with increasing temperature. Severe cracks and collapse were observed frequently in hardwoods and hardly in softwoods. Vessel diameter and tracheid cell wall thickness of the wood samples were decreased with increasing carbonization temperature. Contraction of vessel diameter in tangential direction was greater than that in radial direction. Cell wall thickness of tracheids decreased with increasing carbonization temperature. Consequently, even though it was small range of carbonization temperature, dimensions of wood components were changed considerably.