Página 1 dos resultados de 5788 itens digitais encontrados em 0.009 segundos

“Abenomics: O efeito no retorno dos ETF e contratos futuros sobre o YEN, uma evidência de smart money?”

Monteiro, Rui Manuel Martins
Fonte: Instituto Universitário de Lisboa Publicador: Instituto Universitário de Lisboa
Tipo: Dissertação de Mestrado
Publicado em //2014 Português
Relevância na Pesquisa
37.09%
Mestrado em Economia Monetária e Financeira. / Classificação JEL: G02; G13; G14; Neste trabalho é investigada a capacidade dos investidores, através de Exchange Traded Funds (ETFs) e contratos Futuros sobre o YEN, identificarem corretamente o sentimento do mercado cambial num momento de viragem da política económica Japonesa e consequentemente obterem retornos positivos, i.e. o denominado smart money. Utilizando um conjunto de dados de ETFs contratos Futuros em contínuo, sobre YEN foi possível identificar uma relação entre a expectativa de uma mudança na política cambial Japonesa (objetivo: desvalorização do YEN) e o comportamento dos investidores. Verifica-se alguma divergência entre os resultados sobre os ETFs Ultra YEN e os ETFs UltraShort YEN. Ambos ativos apresentam alguma evidência de smart money, mas, contrariamente ao esperado foram as posições longas que apresentaram melhores resultados. Já nas posições curtas, dada a queda significativa do seu ativo subjacente no período pré-eleitoral, seria de esperar fortes sinais de smart money no entanto estes revelaram-se pouco significativos. Foi, no entanto, junto dos intervenientes do mercado de futuros que os sinais de smart money foram mais claros, tanto Commercial como NonCommercial...

Food demand in Brazil: an application of Shonkwiler & Yen Two-Step estimation method

Coelho,Alexandre Bragança; Aguiar,Danilo Rolim Dias de; Eales,James S.
Fonte: Fundação Instituto de Pesquisas Econômicas - FIPE Publicador: Fundação Instituto de Pesquisas Econômicas - FIPE
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2010 Português
Relevância na Pesquisa
36.62%
The objective of the analysis is to estimate a demand system including eighteen food products using data from a Brazilian Household Budget Survey carried out in 2002 and 2003 (POF 2002/2003). The functional form used was Quadratic Almost Ideal Demand System (QUAIDS). Estimation employs the Shonkwiler and Yen method to account for zero consumption. Results showed that purchase probabilities of staples foods were negatively related to family monthly income, while meat, milk and other products showed a positive relation. Regional, educational and urbanization variables were also important in the first stage estimation. While some of the goods had negative income coefficients, none were inferior and six of eighteen were luxuries based on second stage estimates.

The tomato Never-ripe locus regulates ethylene-inducible gene expression and is linked to a homolog of the Arabidopsis ETR1 gene.

Yen, H C; Lee, S; Tanksley, S D; Lanahan, M B; Klee, H J; Giovannoni, J J
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /04/1995 Português
Relevância na Pesquisa
26.42%
Fruit ripening represents a complex system of genetic and hormonal regulation of eukaryotic development unique to plants. We are using tomato ripening mutants as tools to elucidate genetic components of ripening regulation and have recently demonstrated that the Never-ripe (Nr) mutant is insensitive to the plant growth regulator ethylene (M.B. Lanahan, H.-C. Yen, J.J. Giovannoni, H.J. Klee [1994] Plant Cell 6:521-530). We report here ethylene sensitivity over a range of concentrations in normal and Nr tomato seedlings and show that the Nr mutant retains residual sensitivity to as little as 1 part per million of ethylene. Analysis of ripening-related gene expression in normal and mutant ethylene-treated fruit demonstrates that Nr exerts its influence on development at least in part at the level of ethylene-inducible gene expression. We have additionally used cloned tomato and Arabidopsis sequences known to influence ethylene perception as restriction fragment length polymorphism probes, and have identified a tomato locus linked to Nr that hybridizes to the Arabidopsis ETR1 gene at low stringency, suggesting the possibility that Nr may be homologous to ETR1.

Polymerization of Actin from Maize Pollen.

Yen, L. F.; Liu, X.; Cai, S.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /01/1995 Português
Relevância na Pesquisa
26.42%
Here we describe the in vitro polymerization of actin from maize (Zea mays) pollen. The purified actin from maize pollen reported in our previous paper (X. Liu, L.F. Yen [1992] Plant Physiol 99: 1151-1155) is biologically active. In the presence of ATP, KCl, and MgCl2 the purified pollen actin polymerized into filaments. During polymerization the spectra of absorbance at 232 nm increased gradually. Polymerization of pollen actin was evidently accompanied by an increase in viscosity of the pollen actin solution. Also, the specific viscosity of pollen F-actin increased in a concentration-dependent manner. The ultraviolet difference spectrum of pollen actin is very similar to that of rabbit muscle actin. The activity of myosin ATPase from rabbit muscle was activated 7-fold by the polymerized pollen actin (F-actin). The actin filaments were visualized under the electron microscope as doubly wound strands of 7 nm diameter. If cytochalasin B was added before staining, no actin filaments were observed. When actin filaments were treated with rabbit heavy meromyosin, the actin filaments were decorated with an arrowhead structure. These results imply that there is much similarity between pollen and muscle actin.

Identification of a new gene, tmoF, in the Pseudomonas mendocina KR1 gene cluster encoding toluene-4-monooxygenase.

Yen, K M; Karl, M R
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /11/1992 Português
Relevância na Pesquisa
26.62%
Five genes, tmoABCDE, encoding toluene-4-monooxygenase (T4MO) were previously mapped to a 3.6-kb region of a 10.2-kb SacI DNA fragment isolated from Pseudomonas mendocina KR1 (K.-M. Yen, M. R. Karl, L. M. Blatt, M. J. Simon, R. B. Winter, P. R. Fausset, H. S. Lu, A. A. Harcourt, and K. K. Chen, J. Bacteriol. 173:5315-5327, 1991). In this report, we describe the identification and characterization of a DNA region in the SacI fragment whose expression enhances the T4MO activity determined by the tmoABCDE gene cluster. This region was mapped immediately downstream of the putative transcription termination sequence previously located at the end of the tmoABCDE gene cluster (Yen et al., J. Bacteriol., 1991) and was found to stimulate T4MO activity two- to threefold when expressed in Escherichia coli or Pseudomonas putida. Determination of the nucleotide sequence of this region revealed an open reading frame (ORF) of 978 bp. Expression of the ORF resulted in the synthesis of an approximately 37-kDa polypeptide whose N-terminal amino acid sequence completely matched that of the product predicted from the ORF. The ORF thus defines a gene, which has now been designated tmoF. The TmoF protein shares amino acid sequence homology with the reductases of several mono- and dioxygenase systems. In addition...

Neuraminidase Inhibitor-Resistant Influenza Viruses May Differ Substantially in Fitness and Transmissibility

Yen, Hui-Ling; Herlocher, Louise M.; Hoffmann, Erich; Matrosovich, Mikhail N.; Monto, Arnold S.; Webster, Robert G.; Govorkova, Elena A.
Fonte: American Society for Microbiology Publicador: American Society for Microbiology
Tipo: Artigo de Revista Científica
Publicado em /10/2005 Português
Relevância na Pesquisa
26.42%
Mutations of the conserved residues of influenza virus neuraminidase (NA) that are associated with NA inhibitor (NAI) resistance decrease the sialidase activity and/or stability of the NA, thus compromising viral fitness. In fact, clinically derived NAI-resistant variants with different NA mutations have shown different transmissibilities in ferrets (M. L. Herlocher, R. Truscon, S. Elias, H. Yen, N. A. Roberts, S. E. Ohmit, and A. S. Monto, J. Infect. Dis. 190:1627-1630, 2004). Molecular characterization of mutant viruses that have a homogeneous genetic background is required to determine the effect of single mutations at conserved NA residues. We generated recombinant viruses containing either the wild-type NA (RG WT virus) or a single amino acid change at NA residue 119 (RG E119V-NA virus) or 292 (RG R292K-NA virus) in the A/Wuhan/359/95 (H3N2) influenza virus background by reverse genetics. Both mutants showed decreased sensitivity to oseltamivir carboxylate, and the RG R292K-NA virus showed cross-resistance to zanamivir. We also observed differences between the two mutants in NA enzymatic activity and thermostability. The R292K mutation caused greater reduction of sialidase activity and thermostability than the E119V mutation. The NA defect caused by the R292K mutation was associated with compromised growth and transmissibility...

Nebulised furosemide in acute adult asthma

Yen, Z.; Chen, S.
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /09/2005 Português
Relevância na Pesquisa
26.42%
Report by Zui-Shen Yen, Emergency Physician 
Checked by Shyr-Chyr Chen, Emergency Physician

Using leucine zipper to facilitate α-synuclein assembly

Jiang, Peizhou; Ko, Li-wen; Jansen, Karen R.; Golde, Todd E.; Yen, Shu-Hui
Fonte: The Federation of American Societies for Experimental Biology Publicador: The Federation of American Societies for Experimental Biology
Tipo: Artigo de Revista Científica
Publicado em /09/2008 Português
Relevância na Pesquisa
26.42%
The accumulation of filamentous α-synuclein (α-S) is associated with Parkinson’s disease. It remains controversial as to the mode (antiparallel or parallel) of α-S self-assembly and whether an exact alignment of the central hydrophobic region is essential. In the present study, we performed in vitro assembly using α-S with or without the attachment of artificial leucine zippers (Zips) capable of forming either parallel or antiparallel coiled coils and included a spacer in one derivative. Results showed that Zips accelerate filament assembly in both the parallel and antiparallel fashions, that a precise alignment of the central hydrophobic region is not essential, and that the antiparallel pairs displayed the highest thioflavin T signals. More importantly, cells expressing Zip-fused α-S, but not α-S alone, formed α-S immunopositive and thioflavin S-positive inclusions in 7 days. The results suggest that α-S can assemble in both parallel and antiparallel modes but have a higher tendency to assemble in the latter mode and that cells overexpressing Zip-fused α-S may be used to screen α-S assembly inhibitors due to enhanced ability to form inclusions.—Jiang, P., Ko, L., Jansen, K. R., Golde, T. E., Yen, S.-H. Using leucine zipper to facilitate α-synuclein assembly.

Mapping Antibody Epitopes of the Avian H5N1 Influenza Virus

Yen, Hui-Ling; Peiris, J. S. Malik
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.42%
Hui-Ling Yen and J. S. Malik Peiris discuss a study in PLoS Medicine that provides new information on the human antibody repertoire generated in response to H5N1 influenza virus infection.

Histopathological Effects of the Yen-Tc Toxin Complex from Yersinia entomophaga MH96 (Enterobacteriaceae) on the Costelytra zealandica (Coleoptera: Scarabaeidae) Larval Midgut

Marshall, Sean D. G.; Hares, Michelle C.; Jones, Sandra A.; Harper, Lincoln A.; Vernon, James R.; Harland, Duane P.; Jackson, Trevor A.; Hurst, Mark R. H.
Fonte: American Society for Microbiology Publicador: American Society for Microbiology
Tipo: Artigo de Revista Científica
Publicado em /07/2012 Português
Relevância na Pesquisa
27%
Yersinia entomophaga MH96, which was originally isolated from the New Zealand grass grub, Costelytra zealandica, produces an orally active proteinaceous toxin complex (Yen-Tc), and this toxin is responsible for mortality in a range of insect species, mainly within the Coleoptera and Lepidoptera. The genes encoding Yen-Tc are members of the toxin complex (Tc) family, with orthologs identified in several other bacterial species. As the mechanism of Yen-Tc activity remains unknown, a histopathological examination of C. zealandica larvae was undertaken in conjunction with cultured cells to identify the effects of Yen-Tc and to distinguish the contributions that its individual subunit components make upon intoxication. A progressive series of events that led to the deterioration of the midgut epithelium was observed. Additionally, experiments using a cell culture assay system were carried out to determine the cellular effects of intoxication on cells after topical application and the transient expression of Yen-Tc and its individual components. While observations were broadly consistent with those previously reported for other Tc family members, some differences were noted. In particular, the distinct stepwise disintegration of the midgut shared features associated with both apoptosis and necrotic programmed cell death pathways. Second...

The internationalisation of the yen: essential issues overlooked

Murase, Tetsuji
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Working/Technical Paper Formato: 251287 bytes; 352 bytes; application/pdf; application/octet-stream
Português
Relevância na Pesquisa
36.83%
After years of foot-dragging over the need to internationalise the yen, in 1998 the Japanese government implemented a series of institutional measures to enhance the convenience of using the currency. These have had only modest success. This paper argues that three conditions need to be fulfilled before the yen can become a major international currency: confidence in the Japanese economy and its financial system, stability in the yen exchange rate, and fair and transparent market principles in the Tokyo market. The paper focuses on the importance of the market principles, emphasising the need to address the overpresence of the public sector, especially in postal savings, as this scheme has acted to undermine the proper functioning of the government bond market. When the postal savings scheme comes under self-management in 2001, the market mechanism of the Tokyo capital market might become distorted due to the gargantuan size of its investment, resulting in an oligopoly of the market.; no

The changing role of the yen/dollar exchange rate for japanese monetary policy

Schnabl, Gunther; Danne, Christian
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: ResearchPaper
Português
Relevância na Pesquisa
26.83%
This paper studies the role of the yen/dollar exchange rate in the Bank of Japan’s monetary policy reaction function. In contrast to prior estimations of reaction functions based on the Taylor-rule, we allow for regime shifts by estimating rolling coefficients from January 1974 to March 1999. The results show a temporary impact of the exchange rate on monetary policy around 1978/79 and a persistently increasing impact of the yen/dollar exchange rate after 1986. The ris ing importance of the yen/dollar exchange rate for Japanese monetary policy is in line with increasing efforts to stabilize the yen/dollar exchange rate by foreign exchange intervention after March 1999, when the nominal interest rate reached the zero boundary.

Purchasing power parity: granger causality tests for the yen-dollar exchange rate

Schnabl, Gunther; Baur, Dirk
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: ResearchPaper
Português
Relevância na Pesquisa
36.98%
The paper analyses the causality between the Japanese-US relative export prices and the yen-dollar exchange rate. It explains why the Japanese yen proved strong even during the economic slump of the 1990s. The paper suggests that the appreciation of the Japanese yen forced the Japanese enterprises into price reductions and productivity increases, which put a floor under the high level of the yen and thus initiated rounds of appreciation. This corresponds to the conjecture of a vicious (virtuous) circle of appreciation and price adaptation.

Long swings in Japan’s current account and in the yen

Müller-Plantenberg, Nikolas A.
Fonte: Universidad Autónoma de Madrid, Departamento de Análisis Económico, Teoría Económica e Historia Económica Publicador: Universidad Autónoma de Madrid, Departamento de Análisis Económico, Teoría Económica e Historia Económica
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.62%
The yen has experienced several big swings over recent decades. This paper argues that the fluctuations of the Japanese exchange rate resulted mainly from corresponding movements in the current account, which affected the demand for yen relative to other currencies. The paper builds a vector error correction model for the exchange rate and the current account, based on the idea that the exchange rate and its economic fundamental do not move too far apart over time. In addition, the model allows for a Markov-switching stochastic trend in the current account. Regime changes occur at uncertain dates, possibly in response to exchange rate changes. Bayesian estimation proceeds using an innovative Gibbs-sampling procedure. The empirical results suggest that recurrent structural breaks in the yen’s fundamentals account for the large fluctuations of the Japanese exchange rate.

Comment on 'Yen Bloc: towards economic integration in East Asia'

de Brouwer, Gordon
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Working/Technical Paper Formato: 79055 bytes; 356 bytes; application/pdf; application/octet-stream
Português
Relevância na Pesquisa
27.03%
This is an important book. While I think that the argument in favour of a yen bloc is deeply flawed, C.H. Kwan’s book is a must-read for those interested in East Asian regionalism and integration. It is one of the clearest and best-written expositions of those who propose deeper financial and monetary integration through the formation of a yen bloc. This topic needs to be debated more, and Kwan provides an excellent start. He makes two basic points. The first is that regionalism is on the rise in East Asia, manifest not just in political and trade discussions but also in thinking about finance, monetary systems, and exchange rates. The region is becoming more integrated economically. He describes a virtuous circle between interdependence and economic growth in East Asia. Through trade and investment, industrialisation has spread first from Japan to the newly industrialised economies of East Asia (Hong Kong, Korea, Singapore and Taiwan), and then to ASEAN and China. This has transferred technology, industrial know-how, and capacity. Combined with the waning of ideology, it has enabled countries like China and Vietnam to open their economies and exploit their great advantages in producing and selling labor-intensive goods. The result is an intra-regional growth dynamic and fundamental interdependence...

Implications of the Currency Crisis for Exchange Rate Arrangements in Emerging East Asia

Kawai, Masahiro; Akiyama, Shigeru
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Policy Research Working Paper; Publications & Research
Português
Relevância na Pesquisa
26.62%
The authors examine the implications of the East Asian currency crisis for exchange rate arrangements in the region's emerging market economies. They focus on the roles of the U.S. dollar, the Japanese yen, and the euro in the emerging East Asian economies' exchange rate policies. They claim that these economies are particularly susceptible to large exchange rate fluctuations because they have been pursuing financial deregulation, opening markets, and liberalizing capital accounts, and because they face increased risk of sudden capital flow reversals, with attendant instability in their financial system and foreign exchange market. The authors find that the dollar's role as the dominant anchor currency in East Asia was reduced during the recent currency crisis but has become prominent again since late 1998. It is too early for conclusions, but the economies seem likely to maintain more flexible exchange rate arrangements, at least officially. At the same time, these economies presumably will continue to prefer to maintain exchange rate stability without fixed rate commitments. They are better off choosing a balanced currency basket system in which the yen and the euro play a more important role than before. The ASEAN countries have a special incentive to avoid harmful fluctuations in exchange rates within the region...

On the Populations of Radio Galaxies with Extended Morphology at z<0.3

Lin, Yen-Ting; Shen, Yue; Strauss, Michael; Richards, Gordon; Lunnan, Ragnhild
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.62%
Extended extragalactic radio sources have traditionally been classified into FR I and II types, based on the ratio r of the separation S between the brightest regions on either sides of the host galaxy and the total size T of the radio source. Here we examine the distribution of various physical properties as a function of r of 1040 luminous radio galaxies (RGs) at z<0.3 from the SDSS, NVSS, and FIRST. About 2/3 of the RGs are lobe-dominated (LD), and 1/3 have prominent jets. If we follow the original definition of the FR types (a division based solely on r), FR I and FR II RGs overlap in their host galaxy properties. However, the rare, LD sources with r>0.8 AND OIII5007 line luminosity >10^6 Lsun are markedly different on average from the rest of the RGs, in the sense that they are hosted in lower mass galaxies, live in relatively sparse environments, and have higher accretion rates onto the central SMBH. Thus these objects and the rest of RGs form a well-defined dichotomy. Motivated by the stark differences in the nuclear emission line properties of the RG subsamples, we suggest that the accretion rate onto the SMBH may play the primary role in creating the different morphologies. At relatively high accretion rates, the accretion system may produce powerful jets that create the "classical double" morphology (roughly corresponding to the LD sources with r>0.8 and emission lines); at lower accretion rates the jets from a radiatively inefficient accretion flow generate radio lobes without apparent "hot spots" at the edge (corresponding to the majority of LD sources). At slightly lower accretion rates AND in galaxies with dense galactic structure...

Multifractal Measures for the Yen-Dollar Exchange Rate

Kim, Kyungsik; Yoon, Seong-Min; Choi, Jum-Soo
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 08/05/2004 Português
Relevância na Pesquisa
26.75%
We study the tick dynamical behavior of the yen-dollar exchange rate using the rescaled range analysis in financial market. It is found that the multifractal Hurst exponents with the short and long-run memory effects can be obtained from the yen-dollar exchange rate. This exists one crossover for the Hurst exponents at charateristic time scales, while the bond futures exists no crossover. Particularly, it is shown that the probability distribution of the yen-dollar exchange rate has one form of the Lorentz distribution rather than fat-tailed properties, which is similar to that of for the won-dollar exchange rate.; Comment: 14 pages, 5 figures

Food demand in Brazil: an application of Shonkwiler & Yen Two-Step estimation method

Coelho, Alexandre Bragança; Aguiar, Danilo Rolim Dias de; Eales, James S.
Fonte: Universidade de São Paulo. Faculdade de Economia, Administração e Contabilidade Publicador: Universidade de São Paulo. Faculdade de Economia, Administração e Contabilidade
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/03/2010 Português
Relevância na Pesquisa
36.83%
The objective of the analysis is to estimate a demand system including eighteen food products using data from a Brazilian Household Budget Survey carried out in 2002 and 2003 (POF 2002/2003). The functional form used was Quadratic Almost Ideal Demand System (QUAIDS). Estimation employs the Shonkwiler and Yen method to account for zero consumption. Results showed that purchase probabilities of staples foods were negatively related to family monthly income, while meat, milk and other products showed a positive relation. Regional, educational and urbanization variables were also important in the first stage estimation. While some of the goods had negative income coefficients, none were inferior and six of eighteen were luxuries based on second stage estimates.; O objetivo deste artigo é analisar a demanda de alimentos no Brasil por meio da estimação de um sistema de demanda com dezoito produtos usando dados da Pesquisa de Orçamentos Familiares realizada em 2002 e 2003 (POF 2002/2003). A forma funcional utilizada foi o Quadratic Almost Ideal Demand System (QUAIDS). A estimação utiliza o Procedimento de Shonkwiler e Yen para lidar com o problema do consumo zero. Os resultados mostraram que as probabilidades de aquisição dos produtos básicos foram negativamente relacionadas com a renda familiar mensal...

Yen bloc or koala bloc? Currency relationships after the East Asian crisis

Bowman, Chakriya
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.75%
During the 1990s, several studies found evidence for a "yen bloc", a significant and strengthening relationship between the Japanese yen and East Asian currencies possibly due to regional trade and investment by Japan. It appears that the Australian dollar now plays a similar role in the East Asian region, and the linkages between the Australian dollar and the Asian currencies show as much support for a "koala bloc" as a "yen bloc". This study concludes that the US dollar appears to have declined in importance in post-1997 crisis East Asia, while Australia and Japan are becoming increasingly important regional influences.