• Journal of the Korean Society for Precision Engineering
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• v.23 no.6 s.183
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• pp.44-51
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• 2006

This paper deals with the aspects of die design for the multistage fine tooth hub gear in the cold forging process. In order to manufacture the cold forged product for the precision hub gear used as the ARD 370 system of bicycle, it examines the influences of different designs on the metal flow through experiments and FE-simulation. To find the combination of design parameters which minimize the damage value, the low gear length, upper gear length and inner diameter as design parameters are considered. An orthogonal fraction factorial experiment is employed to study the influence of each parameter on the objective function or characteristics. The optimal punch shape of fine tooth hub gear is designed using the results of FE-simulation and the artificial neural network. To verify the optimal punch shape, the experiments of the cold forging of the hub gear are executed.

• Korean Institute of Interior Design Journal
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• v.13 no.3
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• pp.153-161
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• 2004

Organic Modernism was inaugurated by Alvar Valto as an alternative plan to the formative limitation of Geometrical Modernism. It began to appear in the 1930s in the fields of Architecture, Furniture, Product Design and so on. It is known that began with organic formative language is closely related to surrealistic artists Andre Breton as well as other artists and sculptors in that era. Such Formative Language formalized a stream of Organic Modernism Furniture Design unique to the regional and cultural characteristics of Scandinavia. After crossing over to America, mass production of Furniture was born and new materials were linked by industrialization. The Characteristics of Organic Formation in Modern Art such as Three -Dimensional, Biological Morphological, Symbolical, Primitive, Fantastical, Non-Realistic, Incidental, Irregular, transmit to Furniture Design. They are as Characteristics especially with Three-Dimensional, Biological Morphological and Symbolical aspects. Histories of Art and design, there are some examples showing mutual Interchange between Functional and Artistic Character. This thesis also clarifies the Formative Relationship that the Furniture designers who pursued Functionality and Mass Production had obtained from Modern Artistic works and the Artists, through the process of comparing and researching the typical Artists and their works.

• Journal of the Korean housing association
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• v.14 no.3
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• pp.147-156
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• 2003

A small apartment housings in Korea, which is built mass-product from 1980s, are dissatisfied, in spite of good condition, due to the growing living areas and changing lifestyle of the residents. Many of them confronted with slum areas and the kinds of housing stock accumulated much more in Korean contexts. For the existing small houses, it could be discuss an adaptation model to the increasing requirement standards of the house residents; wider living area, new facilities and a style of new residence. A social policy for elderly people who are handicap in physical and economical aspects, is home stay system rather than national support. But it is not easy to find the three generation family house in Korea context, specially apartment house. This paper deals with the vertical unification typology of two dwelling units to one, in order to supply three generation houses by remodel existing small apartment houses constructed by Korea National Housing Corporation. The use of convert houses into vertical expansion are expected to be a house of three generation family, it can also enhance privacy against conflictive activities in a house. And also the merging types of two dwelling units into one can be used as a device to get rid of the monotonous characteristics and gain diversity in the declining stock housing.

• Resources Recycling
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• v.24 no.1
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• pp.28-34
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• 2015

Generally, when using copper slag mixed into the concrete, due to higher weight of copper slag, a reduction in the compressive strength and durability of the hardened concrete to increased bleeding is caused. In this study, hence copper slag, a kind of by-product was used as an alternative to the fine aggregate, it was carried out in combination with the use of fly ash in eliminating disadvantage and recycling aspects. As a result of this study, the mixing of fly ash is decreased in the 50% of bleeding, 5% of drying shrinkage, 30% of carbonation test and improvement of 10% of compressive strength than that of copper slag only at most.

• Microbiology and Biotechnology Letters
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• v.23 no.5
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• pp.609-616
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• 1995

Effects of lactate concentration, temperature, counter ions, pH as well as voltage (current) in batch electrodialysis (ED) experiments with a 3-compartment unit were investigated. The applied voltage was found to be the most critical factor as expected. The electrodialysis rate increased with the lactate concentration of the source solution. The amount of lactate transferred was limited by the lactate concentration difference between cathode and permeate compartments. The electrodialysis rate did not heavily depend on temperature change. The electrodialysis rate of NH$_{4}$-lactate was faster than that of Na-lactate and both lactates showed the highest electrodialysis rate at a pH of 4.0. A little amount of non-ionic glucose diffused through the anionic membrane to the permeate compartment. To test the effectiveness of the in situ recovery of lactic acid from fermentation broth by ED, three cases of batch culture were carried out; pH control only, ED only, and pH control and ED. The case with both pH control and ED was more efficient than that with pH control only in the aspects of productivity and product yield.

• Asian Journal of Innovation and Policy
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• v.7 no.2
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• pp.287-309
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• 2018

The demand for efficient utilization of input resources and productive outcomes is increasing as the government's R&D investments in Government-funded research institutes (GRIs) expand. These changes call for improving research-planning activities, which are defined as a set of activities wherein objectives are established, strategies for acquisition and expenditures of research resources are devised, and utilizations of research outcomes are addressed. This study introduces the integrated 4P analysis model that identifies the relationships among patents, papers, products, and projects. It looks into 4P analysis structure and its efficiency as a research planning means through case studies of the Korea Research Institute of Chemical Technology. This study introduces 4P analysis applied to KRICT, which can be utilized for outcome-oriented research planning of GRIs. At the same time, it investigates into the benefits and implications of 4P analysis. It proffers policy suggestions on such aspects as how research planning of GRIs should go through changes in a strategic and systematic way.

• English Language & Literature Teaching
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• v.16 no.4
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• pp.267-290
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• 2010

The purpose of this study is to analyze the writing tasks included in the newly developed high school English textbooks in the aspects of genre, rhetorical structure, task type, and authenticity in order to find out whether these tasks could contribute to improving Korean EFL students' writing skills. A total of nine textbooks were selected for the study and every writing task in each textbook was analyzed. The results show that various types of genres were incorporated in the tasks, but very few opportunities were provided for students to acquire characteristics of specific genres. In terms of rhetorical structure of text, narration, illustration, and transaction were required most, whereas not a single writing task asked students to use classification or cause and effect. Many of the writing tasks analyzed offered linguistic and/or content support through the use of models, which displays traces of the product-based approach to teaching writing. Lastly, most of the tasks lacked authenticity represented by explicit discussion of purpose and audience. Implications for L2 writing task development and writing instruction in the Korean EFL context are discussed.

• The Research Journal of the Costume Culture
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• v.12 no.6 s.53
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• pp.918-932
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• 2004

Fashion is a product of form expressing the socio-cultural mood and aesthetic value of an age. Owing to development of the mass media and diversification of arts under the influence of post-modernism in the 20th century, fashion has been more briskly expressed to be presented to the people. With such basic conceptions in mind, this study was aimed at reviewing the fashion photography as visual medium. To this end, visual narrative techniques were analyzed and thereupon, Philip-Lorca diCorcia's fashion photography was examined. This study reviews such visual narrative techniques by dividing into visual and non-visual elements and thereby, examines the three-fold aspects of fashion photography expressions : Representative Level, Ground Level and Context Level. Also this study focuses on Philip-Lorca diCorcia's fashion photography in 'W magazine' which features portfolio form. This study analyzed the visual narratives shown in fashion photography and thereby, expand in diverse ways the fixed images of the conventional fashion photography commercials featuring beautiful models and exquisite costumes, and additionally, determined that fashion photography must be a kind of expression tool which could express not only the simple fashion but also the socio-psychological elements inherent in fashion.

• International Journal of Advanced Culture Technology
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• v.8 no.3
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• pp.90-100
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• 2020

Our overall society circulates in line with the economical situations characterized by production and consumption and companies play the role of providing products and services, thus taking very significant responsibilities for the socioeconomical and cultural aspects in society. Therefore, when designers attempt to think of a way to enable companies and society to share their values and propose specific concepts and visualize outcomes, it is very critical to be able to understand economical philosophy and management strategies that interconnect companies with society and seek out proper design approaches. Recently, the world's enterprise and management culture tend to connect products and services provided by companies through chains of social values. Based on the abovementioned shift in the management paradigm, the researcher investigates and analyzes actual cases of attempts by Samsung Electronics to achieve its social impacts and studies actual roles and approaches of in-house designers with creativity and insights of humanity with regard to these attempts. Each case is selected from various fields such as the company's products and service development, business systems, culture, and external strategies and the ultimate goal is to learn about actual insights and approaches of designers to make contributions to the company's management with social impacts. Especially, humanity and creative thinking of many designers working in the manufacturing industry can have significant contributions to achieving its management with social impacts and effects of sustainable management.

• 연구논문집
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• s.29
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• pp.5-15
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• 1999

Present study deals with performance analysis of an inert gas generator (IGG) which is to be used as an effective mean to suppress the fire. The IGG uses a turbo jet cycle gas turbine engine to generate inert gas for fire extinguishing. It is generally known that a lesser degree of oxygen content in the product of combustion will increase the effectiveness of fire suppressing. An inert gas generator system with water injection will bring advantages of suffocating and cooling effects which are considered as vital factors for fire extinguishing. As the inert gas is injected to the burning site, it lowers the oxygen content of the air surrounding the flame as well as reduces the temperature around the fire as the vapour in the inert gas evaporates during the time of spreading. Some important aspects of influencing parameters, such as, air excess coefficient. $\alpha$, compressor pressure ratio, $ pi_c$, air temperature before combustion chamber, $T_2$, gas temperature after combustion chamber, $T_3$, mass flow rate of water injection, $M_w$, etc., on the performance of IGG system are investigated. Calculations of total amount of water needed to reduce the turbine exit temperature to pre-set nozzle exit temperature employing a heat exchanger were made to compare the economics of the system. A heat exchanger with two step cooling by water and steam is considered to be better than water cooling only. Computer programs were developed to perform the cycle analysis of the IGG system and heat exchanger considered in the present study.