• Proceedings of the Korean Magnestics Society Conference
• /
• 2008.12a
• /
• pp.53.1-53.1
• /
• 2008

• Proceedings of the Optical Society of Korea Conference
• /
• 2003.07a
• /
• pp.262-263
• /
• 2003

In this paper, Gaussian apodized volume grating for demultiplexer is implemented. A 22-channel demultiplexer based on that grating is optically demonstrated. The channel spacing, the interchannel cross-talk level and the channel uniformity of 0.8 nm, -30 dB and 1.5 dB, respectively, are obtained.(omitted)

• Proceedings of the Korean Magnestics Society Conference
• /
• 2016.05a
• /
• pp.62-62
• /
• 2016

• Proceedings of the Korean Magnestics Society Conference
• /
• 2016.11a
• /
• pp.21-21
• /
• 2016

• Korean Journal of Poultry Science
• /
• v.47 no.4
• /
• pp.285-285
• /
• 2020

• Bulletin of the Korean Mathematical Society
• /
• v.59 no.2
• /
• pp.469-479
• /
• 2022

In this paper, we obtain some vanishing theorems for p-harmonic 1-forms on locally conformally flat Riemannian manifolds which admit an integral pinching condition on the curvature operators.

• The Journal of Asian Finance, Economics and Business
• /
• v.7 no.6
• /
• pp.277-286
• /
• 2020

Research on employee commitment to the organization is necessary for human resource management, and the result is applied in practice to improve organizational effectiveness. The aim of the present study is to explore factors affecting organizational commitment at the small and medium-sized enterprises (SMEs) in Vietnam. Besides, the relationship between organizational commitment and job performance is examined as well. The research was conducted on a sample consisting of 67 white-collar workers and 260 blue-collar workers at SMEs. A total of 327 valid complete questionnaires were input into SPSS 20 database for processing to provide evidence. The research model and hypotheses were tested using the technique of the hierarchical multiple regression analysis. The research resultsrevealed that income, reward and welfare, direct manager, working environment, coworker, and promotion opportunity tended to associate positively with organizational commitment. Besides, the finding also showed that, when the employee has a high organizational commitment, it would lead to high job performance. The main findings of this study provided some managerial implications for SMEs, in general, and managers, in particular. It implies that Vietnam's small and medium-sized enterprises should improve these six factors to retain employees as well as enhance their job performance.

• Advances in concrete construction
• /
• v.9 no.3
• /
• pp.327-335
• /
• 2020

Concrete pipes are considered important structures playing integral role in spread of cities besides transportation of gas as well as oil for far distances. Further, concrete structures under seismic load, show behaviors which require to be investigated and improved. Therefore, present research concerns dynamic stress and strain alongside deflection assessment of a concrete pipe carrying water-based nanofluid subjected to seismic loads. This pipe placed in soil is modeled through spring as well as damper. Navier-Stokes equation is utilized in order to gain force created via fluid and, moreover, mixture rule is applied to regard the influences related to nanoparticles. So as to model the structure mathematically, higher order refined shear deformation theory is exercised and with respect to energy method, the motion equations are obtained eventually. The obtained motion equations will be solved with Galerkin and Newmark procedures and consequently, the concrete pipe's dynamic stress, strain as well as deflection can be evaluated. Further, various parameters containing volume percent of nanoparticles, internal fluid, soil foundation, damping and length to diameter proportion of the pipe and their influences upon dynamic stress and strain besides displacement will be analyzed. According to conclusions, increase in volume percent of nanoparticles leads to decrease in dynamic stress, strain as well as displacement of structure.

• Steel and Composite Structures
• /
• v.29 no.1
• /
• pp.125-138
• /
• 2018

The research on the confinement behavior of ultra high performance concrete without and with the use of steel fibers (UHPC and UHPFRC) has been extremely limited. In previous studies, authors experimentally investigated the axially compressive behavior of circular steel tube confined concrete (STCC) short and intermediate columns with the employment of UHPC and UHPFRC. Under loading on only the concrete core, the confinement effect induced by the steel tube was shown to significantly enhance the utimate stress and its corresponding strain of the concrete core. Therefore, this paper develops a simplified stress - strain model for circular STCC columns using UHPC and UHPFRC with compressive strength ranging between 150 MPa and 200 MPa. Based on the regression analysis of previous test results, formulae for predicting peak confined stress and its corresponding strain are proposed. These proposed formulae are subsequently compared against some previous empirical formulae available in the literature to assess their accuracy. Finally, the simplified stress - strain model is verified by comparison with the test results.

• Architectural research
• /
• v.18 no.3
• /
• pp.103-111
• /
• 2016

This paper investigates the characteristics of preservation of Korean modern architecture through Western historic preservation theories and philosophies. This research focuses on the Japanese Government-General of Korea (1926-1995) which was built in 1926 and used as the chief administrative building in Seoul (Keijo in Japanese) during the Japanese colonial period (1910-1945). After Korea was liberated from Japanese rule in 1945, this building was used until 1995 for the South Korean National Assembly, the United States Army Military Government in Korea, and the National Museum of South Korea. Although it served a variety of roles, this building was the most controversial case of historic preservation in Korean modern architecture. To analyze the peculiarities and characteristics of Korean modern architecture and its preservation, this research applied Western historic preservation theories, not exclusively from classical historic preservation theories developed by Viollet-le-Duc and John Ruskin, but also from modern historic preservation theories by Theodore H. M. Prudon, Daniel Blunstone, and Frances A. Yates. This cross-cultural and comparative study of historic preservation helps identify Korean modern architecture's characteristics. It can also be a useful reference in finding the origins of Korean modern architectural identity.