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Complementarities between Bilateral Trade and Financial Integration
Kwanho Shin,Doo Yong Yang 한국경제연구학회 2012 Korea and the World Economy Vol.13 No.1
This paper explores the complementarities between bilateral trade in goods and financial assets. By utilizing a gravity model specification with an extended dataset in terms of time span and asset classification as well as alternative instrumental variables, we confirm the existence of positive evidence for complementarities. We find that common factors such as bilateral distance and other economic size variables that determine both cross-border trade and financial flows contribute to complementarity. However, the fact that the estimated coefficients of distance for financial transactions are about half the size of those for trade in goods suggests that physical distance is less important for financial transactions. Furthermore, the significance of distance in explaining bilateral flows disappears when trade is added as an additional explanatory variable, indicating that distance may not directly influence financial flows. Finally, we also confirm that there exists another important factor that is responsible for the complementarities that exist between trade and financial integration. This additional factor is a direct causal relationship that acts from both directions between trade in goods and financial transactions, while the directional effects from trade in goods to financial transactions are much stronger, as emphasized by Aviat and Coeurdacier (2007).
Enzymatic activity of Endoplasmic Reticulum Oxidoreductin 1 from Bombyx mori
( Kwanho Park ),( Eun-young Yun ),( Tae-won Goo ) 한국잠사학회 2018 International Journal of Industrial Entomology Vol.37 No.1
Most proteins produced in the endoplasmic reticulum (ER) of eukaryotic cells fold via disulfide formation (oxidative folding). Oxidative folding is catalyzed by protein disulfide isomerase (PDI) and PDI-related ER protein thiol disulfide oxidoreductases (ER oxidoreductases). In yeast and mammals, ER oxidoreductin-1s (ERO1s) supply oxidizing equivalent to the active centers of PDI. We previously identified and characterized the ERO1 of Bombyx mori (bERO1) as a thioredoxin-like protein that shares primary sequence homology with other ERO1s. Here we compare the reactivation of inactivated rRNase and sRNase by bERO1, and show that bERO1 and bPDI cooperatively refold denatured RNase A. This is the first result suggesting that bERO1 plays an essential role in ER quality control through the combined activities of bERO1 and bPDI as a catalyst of protein folding in the ER and sustaining cellular redox homeostasis.
Kwanho Kim,Seungjin Lee,Joo-Young Kim,Minsu Kim,Hoi-Jun Yoo IEEE 2009 IEEE transactions on circuits and systems for vide Vol.19 No.11
<P>As object recognition requires huge computation power to deal with complex image processing tasks, it is very challenging to meet real-time processing demands under low-power constraints for embedded systems. In this paper, a configurable heterogeneous multicore architecture with a dual-mode linear processor array and a cellular neural network on the network-on-chip platform is presented for real-time object recognition. The bio-inspired attention-based object recognition algorithm is devised to reduce computational complexity of the object recognition. The cellular neural network is utilized to accelerate the visual attention algorithm for selecting salient image regions rapidly. The dual-mode parallel processor is configured into single instruction, multiple data (SIMD) or multiple-instruction-multiple-data modes to perform data-intensive image processing operations while exploiting pixel-level and feature-level parallelisms required for the attention-based object recognition. The algorithm's hybrid parallelization strategy on the proposed architecture is adopted to obtain maximum performance improvement. The performance analysis results, using a cycle-accurate architecture simulator, show that the proposed architecture achieves a speedup of 2.8 times for the target algorithm over conventional massively parallel SIMD architecture at low hardware cost overhead. A prototype chip of the proposed architecture, fabricated in 0.13 mum complementary metal-oxide-semiconductor technology, achieves 22 frames/s real-time object recognition with less than 600 mW power consumption.</P>
( Kwanho Park ),( Wontae Kim ),( Eunsun Kim ),( Kyu-won Kwak ),( Ji-young Choi ),( Seokhyun Lee ),( Myungha Song ),( Sung-hyun Kim ) 한국잠사학회 2016 International Journal of Industrial Entomology Vol.33 No.2
In natural conditions, the black soldier fly, Hermetia illucens (L.) (Diptera: Stratiomyidae), colonizes in warm temperate regions, and is active in Korea from May through October. Information on black soldier fly rearing, which is affected by seasonal factors in Korea, is limited. This species colonizes and oviposits in a wide variety of decomposing vegetable and animal matter. For mass rearing of black soldier flies, the egg deposition methods are dependent on sunlight and oviposition sites. In this study, we investigated the substrates and oviposition sites preferred by black soldier fly in artificial rearing system. Our results showed that as black soldier flies prefer mating under sunlight, they prefer ovipositing at sites where adequate sunlight and food substrate are available. Further detailed research is required to develop methods for artificially rearing black soldier fly throughout the year in Korea.
( Kwanho Park ),( Heui-sam Lee ),( Tae-won Goo ) 한국잠사학회 2018 International Journal of Industrial Entomology Vol.37 No.2
The rearing of black soldier flies in Korea is affected by seasonal factors such as temperature and sun light; for this reason, it requires a great deal of effort to rear and maintain black soldier flies during the winter. In this study, we investigated how starvation affects larval development. After hatching the larvae, they were fed for 5 or 10 d and then starved for a certain period to see how they recovered. The length and width of larvae were estimated to be 18.18 to 21.96 mm, 5.19 to 6.04 mm, respectively. Larvae survivorship to the pupal stage was significantly different between groups and periods of starvation. The groups of fed for 5 d then starved showed a high survival rate until 20 d starvation and then the survival of larvae rapidly decreased. The survival rate of the larvae was abruptly decreased for 20 d starvation in the groups of fed for 10 d and starved, and then gradually decreased until 60 d starvation thereafter. Our research attempted to influence larvae development through starvation and provides basic information on how to culture the black soldier fly effectively and economically throughout the year.