Seoul, South Korea
Seoul, South Korea

Induk University is a university in Seoul, South Korea. It was established by Asian American writer Induk Pahk as "Berea in Korea" in 1963, became the "Induk Institute of Design" in 1971, and was renamed "Induk University" in 2009. It is located in Nowon-gu, along with a number of other educational institutes. The university provides a range of two- and three-year courses.Soo Jung Kim—creator of Dooly the Little Dinosaur and former president of the Korea Animation Producers Association—teaches at the university's Department of Animation. Actor Shin Hyun-joon is an acting professor in the Department of Broadcasting and Entertainment.The university has a number of student clubs and business start-up clubs. After the 2010 Chile earthquake students from the Department of Tourism and Leisure Management raised 800,000 won to help rebuild a school in Chile. Wikipedia.

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Lee T.,Gyeongsang National University | Jeong C.,Induk University
Journal of Applied Meteorology and Climatology | Year: 2014

In the frequency analyses of extreme hydrometeorological events, the restriction of statistical independence and identical distribution (iid) from year to year ensures that all observations are from the same population. In recent decades, the iid assumption for extreme events has been shown to be invalid in many cases because long-term climate variability resulting from phenomena such as the Pacific decadal variability and El Niño-Southern Oscillation may induce varying meteorological systems such as persistent wet years and dry years. Therefore, the objective of the current study is to propose a new parameter estimation method for probability distribution models to more accurately predict the magnitude of future extreme events when the iid assumption of probability distributions for large-scale climate variability is not adequate. The proposed parameter estimation is based on a metaheuristic approach and is derived from the objective function of the rth power probability-weighted sum of observations in increasing order. The combination of two distributions, gamma and generalized extreme value (GEV), was fitted to the GEV distribution in a simulation study. In addition, a case study examining the annual hourly maximum precipitation of all stations in South Korea was performed to evaluate the performance of the proposed approach. The results of the simulation study and case study indicate that the proposed metaheuristic parameter estimation method is an effective alternative for accurately selecting the rth power when the iid assumption of extreme hydrometeorological events is not valid for large-scale climate variability. The maximum likelihood estimate is more accurate with a low mixing probability, and the probability-weighted moment method is a moderately effective option. © 2014 American Meteorological Society.

Lee T.,Gyeongsang National University | Jeong C.,Induk University
Journal of Hydrology | Year: 2014

Hydro-meteorological time series on finer temporal scales, such as hourly, are essential for assessing the hydrological effects of land use or climate change on medium and small watersheds. However, these time series are, in general, available at no finer than daily time intervals. An alternative method of obtaining finer time series is temporal downscaling of daily time series to hourly time series. In the current study, a temporal downscaling model that combines a nonparametric stochastic simulation approach with a genetic algorithm is proposed. The proposed model was applied to Jinju station in South Korea for a historical time period to validate the model performance. The results revealed that the proposed model preserves the key statistics (i.e., the mean, standard deviation, skewness, lag-1 correlation, and maximum) of the historical hourly precipitation data. In addition, the occurrence and transition probabilities are well preserved in the downscaled hourly precipitation data. Furthermore, the RCP 4.5 and RCP 8.5 climate scenarios for the Jinju station were also analyzed, revealing that the mean and the wet-hour probability (P1) significantly increased and the standard deviation and maximum slightly increased in these scenarios. The magnitude of the increase was greater in RCP 8.5 than RCP 4.5. Extreme events of different durations were also tested. The downscaled hourly precipitation adequately reproduced the statistical behavior of the extremes of the historical hourly precipitation data for all durations considered. However, the inter-daily relation between the 1st hour of the present day and the last hour of the previous day was not preserved. Overall, the results demonstrated that the proposed temporal downscaling model is a good alternative method for downscaling simulated daily precipitation data from weather generators or RCM outputs. © 2013 Elsevier B.V.

Lee H.,Dong - A University | Kim C.,Induk University | Park Y.,Seoul National University
Computers and Industrial Engineering | Year: 2010

One of the most crucial decisions in service development is concept selection. Nevertheless, little attention has been paid to evaluation of new service concepts (NSCs). This study proposes an analytic network process (ANP) approach to evaluation of NSCs. ANP is a multiple criteria decision making (MCDM) method that can accommodate interdependency among decision attributes. The proposed approach measures feasibility of NSCs in terms of strategy, technology, market, implementation, and operation. The derived feasibility values of NSC alternatives are then employed to construct the NSC portfolio matrix, together with customers' preference. The NSC portfolio matrix is expected to aid decision making on concept selection and provide managerial implications for service development. A case of the mobile information and entertainment service is presented to illustrate the proposed approach. © 2009 Elsevier Ltd. All rights reserved.

Yoon I.-S.,Induk University
Advanced Materials Research | Year: 2014

Traditionally main driving force of chloride penetration in concrete have been regarded as a diffusion, however, large construction such as tunnel elements and foundations for bridges can be placed on large sea water depths where the water pressure is fairly different from the pressure in the splash zone. Moreover, hydrostatic pressure increases in proportional to measured depth from the surface of water because of the increasing weight of water exerting downward force from above. In this study, new experiment method to estimate chloride penetration of concrete under water pressure is introduced. The water pressure has a great influence on the chloride penetration and thereby on the service life of marine concrete. © (2014) Trans Tech Publications, Switzerland.

Lee H.,Seoul National University of Science and Technology | Kim C.,Induk University
Expert Systems with Applications | Year: 2014

This paper proposes a data envelopment analysis (DEA) approach to measurement and benchmarking of service quality. Dealing with measurement of overall service quality of multiple units with SERVPERF as multiple-criteria decision-making (MCDM), the proposed approach utilizes DEA, in particular, the pure output model without inputs. The five dimensions of SERVPERF are considered as outputs of the DEA model. A case study of auto repair services is provided for the purpose of illustration. The current practice of benchmarking of service quality with SERVQUAL/SERVPERF is limited in that there is little guidance to whom to benchmark and to what degree service quality should be improved. This study contributes to the field of service quality benchmarking by overcoming the above limitations, taking advantage of DEA's capability to handle MCDM problems and provide benchmarking guidelines. © 2013 Elsevier Ltd. All rights reserved.

Han S.B.,Induk University
International Journal of Automotive Technology | Year: 2013

EGR (Exhaust Gas Recirculation) is one of the most effective techniques currently available for reducing NOx emissions from compression ignition engines but its application to LPG (liquefied petroleum gas) fueled HCCI (Homogeneous Charge Compression ignition) engine is yet to be widely implemented. The objective of this research is to determine the effects of EGR on the combustion processes of HCCI-LPG engine. Butane and propane were used for the LPG fueled HCCI engines. For this purpose, a 4-cylinder, compression ignition engine was converted into a HCCI-LPG engine, and a heating device was installed to raise the temperature of the intake air and also to make it more consistent. In addition, a pressure sensor was inserted into each of the cylinders to investigate the differences in characteristics among the cylinders. © 2013 The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.

Jeon J.S.,Induk University
Marine Georesources and Geotechnology | Year: 2016

A very soft ground constructed by dredging and hydraulic fill has characteristics such as high water content, high initial void ratio, and very little effective stress. Estimating, with thorough considerations about consolidation properties and the initial stress associated with each layer’s distinctive stress history, is essential in order to predict a reasonable consolidation settlement of soft ground. By investigating a construction project for national industrial complexes at a coastal area in southern Korea that experienced reclamation and ground improvement adapting PVD, various laboratory tests to find consolidation properties were performed with undisturbed samples collected from the entire depth of the marine clay fill layer and original clay layer. Through the investigation, this report suggests relationships of heterogeneity of permeability in both vertical and horizontal directions, void ratio-effective stress, and void ratio-permeability. Considering the fact that the original clay layer was under the process of consolidation by load due to hydraulic fill from the top, estimating the appropriate initial stress of each layer is critical to predict the future process of consolidation settlement determined by time. In order to obtain the initial stresses of two layers with different stress histories related to consolidation, cone penetration and dissipation tests were conducted. © 2016, Copyright © Taylor & Francis Group, LLC.

Seol H.,Korea Air Force Academy | Lee S.,Ajou University | Kim C.,Induk University
Expert Systems with Applications | Year: 2011

From a resource-based point of view, firm's technological capabilities can be used as underlying sources for identifying new businesses. However, current methods are insufficient to systematically and clearly support firms in finding new business areas based on their technological strength. This research proposes a systematic approach to identify new business areas grounded on the relative technological strength of firms. Patent information is useful as a measure of firms' technological resources and data envelopment analysis (DEA) is beneficial to obtain the weighted value of patents according to their quality. With this weighted quality of patents, a firm can evaluate their relative technological strength at the industry and product level according to potential business areas. To compute technological strength by products, this research applies text mining method to patent documents, a method which a researcher discovers knowledge with unstructured data with. This paper shows the usefulness of the newly proposed framework with a case study. © 2010 Published by Elsevier Ltd.

Yoon I.-S.,Induk University
Advances in Materials Science and Engineering | Year: 2012

For enhancing the service life of concrete structures, it is very important to minimize crack at surface. Even if these cracks are very small, the problem is to which extend these cracks may jeopardize the durability of these decks. It was proposed that crack depth corresponding with critical crack width from the surface is a crucial factor in view of durability design of concrete structures. It was necessary to deal with chloride penetration through microcracks characterized with the mixing features of concrete. This study is devoted to examine the effect of high strength concrete and reinforcement of steel fiber on chloride penetration through cracks. High strength concrete is regarded as an excellent barrier to resist chloride penetration. However, durability performance of cracked high strength concrete was reduced seriously up to that of ordinary cracked concrete. Steel fiber reinforcement is effective to reduce chloride penetration through cracks because steel fiber reinforcement can lead to reduce crack depth significantly. Meanwhile, surface treatment systems are put on the surface of the concrete in order to seal the concrete. The key-issue is to which extend a sealing is able to ensure that chloride-induced corrosion can be prevented. As a result, penetrant cannot cure cracks, however, coating and combined treatment can prevent chloride from flowing in concrete with maximum crack width of 0.06mm and 0.08mm, respectively. Copyright © 2012 In-Seok Yoon.

Baek S.-Y.,Induk University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

Micro/nanoscale diamond cutting tools used in ultra-precision machining can be fabricated by precision grinding, but it is hard to fabricate a tool with a nanometric cutting edge and complex configurations. High-precision geometry accuracy and special shapes for microcutting tools with sharp edges can be achieved by FIB milling. Because the FIB milling method induces much smaller machining stress compared with conventional precision grinding methods. In this study, the FIB milling characteristics of single-crystal diamond were investigated, along with methods for decreasing the FIB-induced damage on diamond tools. Lift-off process method and Pt(Platinum) coating process method with FIB milling were investigated to reduce the damage layer on diamond substrate and quadrilateral-shaped single-crystal diamond cutting tool with cutting edge width under 500 nm were obtained. © 2015 SPIE.

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