http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jun Su,Shunli CHEN,Fei-ping ZHANG 한국곤충학회 2015 Entomological Research Vol.45 No.3
Differences in composition of on‐year, off‐year and new leaves in Phyllostachys pubescens (moso bamboo) forests will affect the resistance of Pantana phyllostachysae larvae and the parasitic ability of Beauveria bassiana. Pantana phyllostachysae fed on mixed leaves of on‐year, off‐year and new bamboo leaves. The activities of acetylcholine esterase (AChE) and glutathione S‐transferase (GSTs) in P. phyllostachysae larvae fed on mixed leaves were significantly higher, greatly reducing the pathogenicity of B. bassiana to P. phyllostachysae larvae compared with the treatments of off‐year and new bamboo leaves. The phenoloxidase (PO) activity in P. phyllostachysae larvae feeding on mixed leaves varied within three days after parasitization by B. bassiana, which indicated higher and less changeable PO activity compared with treatments of off‐year and new bamboo leaves. Inclusion of new leaves differed greatly due to its growth, in which, both AChE and GSTs activities were higher than the off‐year leaf treatment, leading to a lower pathogenicity of B. bassiana to P. phyllostachysae larvae feeding on new leaves compared with off‐year leaves. On the contrary, the pathogenicity of B. bassiana to P. phyllostachysae larvae feeding on on‐year leaves was lower than other treatments. AChE and GSTs activities in P. phyllostachysae larvae were lower and PO activity was less changeable, which might be related to the disadvantage of the larval surface structure to B. bassiana infection in the on‐year leaf treatment.
AHP와 포터의 다이아몬드 모델을 이용한 공항경제권의 경쟁력 결정요인에 관한 연구
하준수 ( Ha¸ Jun-su ),임채환 ( Lim¸ Chaehwan ),조광휘 ( Cho¸ Kwang-hee ),하헌구 ( Ha¸ Hun-koo ) 한국로지스틱스학회 2021 로지스틱스연구 Vol.29 No.4
This paper aims to identify the priorities of the factors for determining the competitiveness of the Airport Economic Zone. To evaluate the relative importance of the factors, the AHP(analytical hierarchy process) based on expert surveys is used. The four decision factors that make up the Airport Economic Zone competitiveness analysis model were set to ‘Factor conditions’, ‘Demand conditions’, ‘The related and supportive companies’, ‘Management strategies and competition systems’. 'Human·Physical resources' and 'Logistics·Transportation infrastructure' were selected as sub-components of the ‘Factor conditions’, and 'Business demand' and 'Tourism·Logistics demand' were selected as sub-components of the ‘Demand conditions’. 'Core Industry Development Level' and 'Support facility status' were selected as sub-components of ‘The related and supportive companies’, and 'Management strategies' and 'Competitiveness in the hinterland' were selected as sub-components of ‘Management strategies and competition systems’. The competitiveness analysis model derived from this study is applicable to other Airport Economic Zones. Therefore, it is believed that implementing a comparative analysis with other Airport Economic Zone based on the analysis model presented in this study could lead to additional implications for the competitive determinants of the Airport Economic Zone.
SnSe2 결함 도입으로 인한 SnSe의 고온 열전성능 증대 메커니즘
JunSu Kim,Seong-Mee Hwang,Hyunjin Park,Yinglu Tang,Won-Seon Seo,Chae Woo Ryu,Heesun Yang,Weon Ho Shin,Hyun-Sik Kim 대한금속·재료학회 2023 대한금속·재료학회지 Vol.61 No.11
SnSe is a promising thermoelectric material due to its low toxicity, low thermal conductivity, and multiple valence band structures, which are ideal for high electronic transport properties. The multiple valence band structure has attracted many attempts to engineer the carrier concentration of the SnSe via doping, to place its fermi level at a position where the maximum number of valence bands can participate in the electronic transport. Up until now, ~5 × 1019 cm-3 was the highest carrier concentration achieved in SnSe via doping. Recently, introducing SnSe2 into SnSe was found to effectively increase the carrier concentration as high as ~6.5 × 1019 cm-3 (at 300 K) due to the generated Sn vacancies. This high carrier concentration at 300 K, combined with the reduction in lattice thermal conductivity due to SnSe2 micro-domains formed within the SnSe lattice, improved the thermoelectric performance (zT) of SnSe – xSnSe2 as high as ~2.2 at 773 K. Here, we analyzed the changes in the electronic band parameters of SnSe as a function of temperature with varying SnSe2 content using the Single Parabolic Band (SPB) model. According to the SPB model, the calculated density-of-states effective mass and the fermi level are changed with temperature in such a way that the Hall carrier concentration (nH) of the SnSe – xSnSe2 samples at 773 K coincides with the optimum nH where the theoretically maximum zT is predicted. To optimize the nH at high temperatures for the highest zT, it is essential to tune the 300 K nH and the rate of nH change with increasing temperature via doping.
Hybrid scheduling scheme for a cooperative relay system in heterogeneous traffic environments
Junsu Kim,Sung Moon,Dan Sung IEEE 2009 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.8 No.7
<P>We propose a hybrid scheduling scheme which can efficiently support various types of traffic in a cooperative relay system of downlink cellular networks. The hybrid scheduling scheme harmonizes the shared-channel resource allocation scheme and dedicated-channel resource allocation scheme to accommodate various traffic in heterogeneous traffic environments. We show that the proposed scheme significantly improves the system performance in terms of system throughput in heterogeneous traffic environments through the analysis of the system capacity and throughput.</P>
Throughput Estimation of Downlink Packet Access Systems Based on a Point Mass Approximation Concept
Junsu Kim,Sung Ho Moon,Dan Keun Sung IEEE 2010 IEEE Transactions on Vehicular Technology VT Vol.59 No.7
<P>Although the system throughput of a wireless communication system considering multiple users' geographical distribution on a 2-D plane and various traffic characteristics is an important performance metric, its mathematical analysis is very difficult due to the nonindependent identically distributed distribution of the received signal-to-noise ratio (SNR) of each mobile terminal and the complex dynamics of the traffic patterns. Therefore, complicated system-level simulations have been the only approach to evaluate the system throughput of downlink packet-access systems. In this paper, we propose an efficient analytical approach to estimate the system throughput of downlink packet-access systems by using point mass approximation, which is widely used in physics and mechanics. The proposed analysis framework enables the mathematical analysis of the system throughput performance by considering various positions of mobile terminals and traffic patterns without the complicated and heavy system-level simulations. Although the proposed approach has a tradeoff relation between computation complexity and accuracy, we show that it is possible to obtain an effective accuracy with moderate complexity using the proposed analytical approach.</P>
Exposure assessment of engineered nanomaterials in the workplace
Junsu Park,곽병규,Eunjoo Bae,최경희,김영훈,Jeongjin Lee,이종협 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.6
Nanotechnology is a rapidly growing field and numerous products containing engineered nanomaterials are already in the market. With the increasing use of engineered nanomaterials, it is expected to increase the exposures to nanomaterials in the workplace. However, the researches on the exposure assessment of nanomaterials to humans and the environment are just a beginning step, as the nanotechnology industries are expanding. Questionnaire surveys conducted by various organizations reveal that many nanotechnology companies are searching for information on exposure measurement for the protection of workers who handle nanomaterials. We analyze the trends of researches on the occupational exposure measurement of engineered nanomaterials and investigate the methodologies of exposure assessment recommended by the related working groups. This work is expected to fill the gaps in knowledge on the exposure assessment of nanomaterials.