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PORT PRICING IN A CONGESTIBLE INTERMODAL TRANSPORT SYSTEM
Andrew Yuen,Anming Zhang 인하대학교 정석물류통상연구원 2007 인하대학교 정석물류통상연구원 학술대회 Vol.2007 No.3
This paper examines the price decisions of an intermodal transport system that consists of two congestible facilities, namely, a port and a highway, each of which is operated by an independent regional jurisdiction. Each facility in this intermodal transport system serves its own local traffic as well as the common transit traffic. We investigate port pricing in a two-stage model where facility charges are chosen independently by the jurisdictions in the first stage, and then in the second stage, oligopoly shipping liners (‘carriers’) at the port compete in Cournot fashion. We find that first, congestion costs incurred by transit users are internalized by both the facility operators and downstream carriers, but the ‘market distortion’ due to carriers’ exploitation of market power with respect to transit traffic is actually strengthened. Second, in the profit-maximizing case, the port strengthens the downstream market power in the local market and vertical externalities exist in port pricing. Third, the inter-governmental cooperation resolves the socially inefficient outcome of the non-cooperative pricing. Specifically, congestion costs incurred by local users of the other region have been taken into account in local facility charges, while the ‘double marginalization’ problem in the transit market is also eliminated.
Unilater Greenhouse Gas Regulation and the Aviation Industry
Andrew C.L. Yuen,Anming Zhang 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.11
This paper analytically examines the effects of unilateral greenhouse gas(GHG) regulation on the aviation industry and global GHG emissions. Our results suggest that such regulation may lead to and increased in aviation fees charged by the implementing country. The increased fees may weaken the competitiveness of its domestic airlines, resulting in a decline in he connecting flights between the domestic hub and spoke airports, while an increase in the foreign connecting flights. Taken together, these effects might actually lead to an increase in the total (global) GHG emissions, The conditions for this somewhat counter-intuitive result to arise are identified. The analysis suggests the importance of adopting a global approach towards aviation GHG emissions. Finally, the effects of implementing the Kyoto Protocol in the aviation industry are examined.
Cancellable iris template generation based on Indexing-First-One hashing
Lai, Yen-Lung,Jin, Zhe,Jin Teoh, Andrew Beng,Goi, Bok-Min,Yap, Wun-She,Chai, Tong-Yuen,Rathgeb, Christian Elsevier 2017 Pattern Recognition Vol.64 No.-
<P><B>Abstract</B></P> <P>Eye iris has been widely recognized as one of the strongest biometrics attributed to its high accuracy performance. However, templates in conventional iris recognition systems are unprotected and highly vulnerable to numerous security and privacy attacks. Despite a number of cancellable biometric schemes have been proposed but at the expense of substantially decreased accuracy performance. In this paper, we introduce a new cancellable iris scheme, coined as “Indexing-First-One” (IFO) hashing. IFO hashing is inspired from the Min-hashing that primarily used in text retrieval domain. However, IFO hashing has been further strengthened by two novel mechanisms, namely P-order Hadamard product and modulo threshold function. The IFO hashing scheme strikes the balance between accuracy performance and privacy/security protection. Comprehensive experiments on CASIA-v3 iris benchmark database and rigorous analysis demonstrate decent accuracy performance with respect to its original counterparts yet offer strong resilience against several major security and privacy attacks.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new scheme to generate cancellable iris template with Jacaard similarity matcher. </LI> <LI> Modification of Min-hashing to strengthen the privacy security in IFO. </LI> <LI> IFO provides strong security and privacy against SHA, MHA, ARM, PIA attacks. </LI> <LI> IFO can be applied to variety of biometric feature with binary representation. </LI> </UL> </P>
Eun Ju Cho,Christen Y.L. Yuen,Byung-Ho Kang,Christine A. Ondzighi,L. Andrew Staehelin,David A. Christopher 한국분자세포생물학회 2011 Molecules and cells Vol.32 No.5
Protein disulfide isomerase (PDI) is a thiodisulfide oxidoreductase that catalyzes the formation, reduction and rearrangement of disulfide bonds in proteins of eukaryotes. The classical PDI has a signal peptide, two CXXCcontaining thioredoxin catalytic sites (a,a′), two noncatalytic thioredoxin fold domains (b,b′), an acidic domain (c)and a C-terminal endoplasmic reticulum (ER) retention signal. Although PDI resides in the ER where it mediates the folding of nascent polypeptides of the secretory pathway,we recently showed that PDI5 of Arabidopsis thaliana chaperones and inhibits cysteine proteases during trafficking to vacuoles prior to programmed cell death of the endothelium in developing seeds. Here we describe Arabidopsis PDI2, which shares a primary structure similar to that of classical PDI. Recombinant PDI2 is imported into ER-derived microsomes and complements the E. coli protein-folding mutant, dsbA. PDI2 interacted with proteins in both the ER and nucleus, including ER-resident protein folding chaperone, BiP1, and nuclear embryo transcription factor, MEE8. The PDI2-MEE8 interaction was confirmed to occur in vitro and in vivo. Transient expression of PDI2-GFP fusions in mesophyll protoplasts resulted in labeling of the ER, nucleus and vacuole. PDI2 is expressed in multiple tissues, with relatively high expression in seeds and root tips. Immunoelectron microscopy with GFP- and PDI2-specific antisera on transgenic seeds (PDI2-GFP) and wild type roots demonstrated that PDI2 was found in the secretory pathway (ER, Golgi, vacuole, cell wall) and the nuclei. Our results indicate that PDI2 mediates protein folding in the ER and has new functional roles in the nucleus.