• Journal of Sericultural and Entomological Science
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• v.41 no.1
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• pp.1-8
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• 1999

Hemolymph protein patterns of silkworms in terms of short and long life span were analyzed by native- and SDS-polyacrylamide gel electrophoresis (PAGE) with the developmental stages. From the native-PAGE patterns of silkworm major hemolymph proteins there were varietal differences on the first day of the pupal stage and were classified into there groups MHP-a, b and c SA 10, JAM109 and J037 were grouped into MHP-Ⅰ, Hangang, Chungmun and Daizo(sdi) into MHP-Ⅱ and NTZN, Sulak, Qoichuk and PR varieties into MHP-Ⅲ group. It was found that the MHP in each group revealed similar patterns and changes with development of pupal stage. In the first day of adult, MHP-c was clearly detected in both female and male of the Daizo(sdi), but not in the J037, indicating that there was significantly varietal differences in electrophoretical protein pattern. In addition, the results of protein pattern of hemolymph by SDS-PAGE showed also varietal differences in the concentration of hemolymph protein.

• Journal of the Society of Naval Architects of Korea
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• v.60 no.2
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• pp.65-75
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• 2023

Ships operated at sea for a long time are subjected to various kinds of loads, which may cause various types of damage. Such damages will eventually reduce the strength of hull structures. Therefore, it is necessary to estimate and evaluate the residual strength and remaining fatigue life of aging ships in order to secure structural safety, establish a reasonable maintenance plan, and make a judgment of life extension. For this purpose, the corrosion damage and local denting damage should be measured, fatigue damage estimation should be performed, and material properties of aged steel should be identified. For this study, in order to investigate the mechanical properties of aged steel, steel plates were obtained from a naval ship that reached the end of her life span. The specimens were manufactured from the obtained steel plates, and static and dynamic tensile tests, fatigue tests, and metallographic tests were performed. The mechanical properties obtained from the aged steel plates were compared with those of new steel plates to quantify the aging effect on the mechanical properties of marine steel materials.

• Advances in concrete construction
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• v.5 no.4
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• pp.303-311
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• 2017

The concrete industry of developing countries like India consumes majority of natural resources. The increase in population has necessitated the construction of more and more structures. Further many structures have completed their life span or have undergone damages thus warranting the demolition of these structures. India produces approximately 23.75 million tons of recycled concrete aggregate (RCA) annually. The natural resources are depleting at a higher rate with the increasing demand of concrete industry. This difficulty can be reduced with the use of RCA in land fill and concrete manufacturing. Use of RCA can provide cost savings and better energy utilization. This paper presents mechanical behavior of concrete comprising successively recycled concrete aggregate. Mechanical properties of recycled concrete get affected with number of recycling. In mix design successive recycled concrete aggregate (SRCA) was used in place of natural aggregates (NA) with 100% replacement. The test results of the compressive, flexural strength and pulse velocity were obtained for 14 and 28 days of curing age which showed significant improvement in results.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.20 no.1
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• pp.60-66
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• 2011

In this paper, the computer simulation analyzed the effective plastic strain and temperature behaviors. The quantitative analyses which proposed the effective mold design of S/CAM shaft was executed. The parameters of forging shape that affected on the optimize conditions that was calculated with simple equation were investigated. it is expected that the developed analysis model and design technique would greatly contribute to the drum brake optimal design considering effective plastic strain and temperature affected behaviors. This development could save more than 20% of production cost and reduced failure rate to more than 30%. By improving the life span of mold from 15,000 to 25,000, financial difficulty of company imposed on a mold manufacture could be overcome.

• Korean Journal of Food Science and Technology
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• v.35 no.3
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• pp.479-482
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• 2003

Radiosensitizing and antitumor effects of hot water extract derived from the seed of Benincasae hispida were investigated. The extract showed maximum survival rate of 21% at 0.1 g/kg against L1210 cells implanted in BDF1 mice. Radiosensitivity of human tumor cell line was evaluated through sulforhodamine assay. Inhibition rate of SK-OV-3 cells after 5 Gy radiation by Benincasae hispida seed extract at 2 mg/mL was 86%.

• Journal of the Semiconductor & Display Technology
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• v.7 no.1
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• pp.59-65
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• 2008

There are no products, systems to manage health and detect security for infant, the old and the weak in Korea. Recently, the concerns of parents are increasing more about all of children(baby, infant, etc) because rate of birth is decreasing gradually. Also, the average span of human life is on an increasing trend according to well-being and evolution of medical treatment. Therefore, this treatise analyzed problems in managing and following-up infant, the old and the weak at present. By using TRIZ to solve problems, we devised new conceptional ideas, detail designs to manage health, detect security, cope with correspondences for them and developed the prototype and tested it. Excellent performances are proved through various field test.

• Journal of Contemporary Eastern Asia
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• v.15 no.1
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• pp.78-97
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• 2016

Living labs are an increasingly popular methodology to enhance innovation. Living labs aim to span boundaries between different organizations, among others Triple helix actors, by acting as a network organization typically in a real-life environment to foster co-creation by user-groups. This paper presents critical factors of Living labs in boundary-spanning between Triple Helix actors. Derived from a mixed-method approach and applications in the healthcare sector, the three main critical factors turn out to be 1) an adequate user-group selection and involvement, specifically a rich interaction and absorption of its results, 2) a balanced involvement of all relevant actors, and 3) a sufficient (early) attention for values, both values of user-groups and values of the management. People-oriented Living labs tend to differ from institution-oriented Living labs regarding these critical factors. Further, universities tend to take on diverse roles and strength of involvement, while the business sector tends to be actively involved only if this has been set as an explicit aim at start. The paper closes with a summary and future research paths.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.3
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• pp.662-668
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• 2011

Domestic rail industry for the development of Korea High Speed Rail paid for high technology, imported to Korea. However, If technology based on conditions that are not equipped with relevant skills is received, there are limits to what it used to. so team of high speed railway began technical development. In this study, through the motor block resistant plan, the current block resistant identifies problems related to it, in order to improve the quality of the parts, secure the standards and guarantee their life span. The localization of the resistant is really possible thanks to the technical skills.

• Journal of the Korea Institute of Building Construction
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• v.2 no.2
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• pp.121-127
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• 2002

The functions and uses of existing buildings are not properly changing as modern life needs. As a result, the frequent reconstruction(construction after removal) of existing buildings have been done but it became more and more difficult because of strengthening of regulations and systems concerning construction. And also it has several disadvantages like lower plot ratio and site coverage than existed buildings, enormous construction cost, production of waste-construction materials and thoughtless consumption of natural resources, which gives rise to environmental pollution. Therefore renovation is brought to the fore. In Korea, many business buildings were constructed in 1960s-1970s, during the period of high growth. Such buildings needs to be repaired in whole. It is caused by the change of social, economic, and cultural conditions and deterioration of equipments. Therefore renovation meets some necessary conditions; recovery of building functions and extension of building life span. In case study, the present state of renovation in business buildings is 1) Basic safety, for example, fire prevention and crime prevention, is great important. 2) Advanced technology, INS(international news service), IBS(Intelligent Building System), and internationalization, is pursued for adapting to multimedia ages. 3) It tries to promote proficiency, and to save the energy using spatial environment and natural energy(light and sound). Also, improving comfortable level of users and installing equipments for physically handicapped person needs to be considered.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.166-167
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• 2018

With the development of information and communication technology, the level of life convenience of ordinary users has been improved much. In addition, the measurement and management of health by information and communication technology increases the life span of human being. As a result, health concerns is increasing, and the interest of the public is increasing. Therefore, in this study, we consider the result of designing and making the device for searching for whether there is the abnormal symptoms of the legs caused by abnormal symptoms. In particular, the development of a device for measuring symptoms of varicose veins in the lower extremities will be discussed.