146,563 research outputs found
Yuan Real Exchange Rate Undervaluation, 1997-2006. How Much, How Often? Not Much, Not Often
No full textYuan real effective exchange rate misalignment is esitimated in a behavioral equilibrium exchange rate (BEER) model for the period 1997 to third quarter 2007. Using the Beveridge-Nelson decomposition a vector error correction model (VECM) of the exchange rate as a function of macroeconomic fundamentals, including government expenditures, economic openness, the balance of trade surplus, and net foreign assets, is estimated. We find that the Chinese Yuan has been fluctuating moderately around its long run equilibrium value with undervaluation up to 4% and overvaluation up to 6% at various points in time since 1997. This result is consistent with findings of many of the most recent studies employing alternative econometric methodologies to determine the equilibrium exchange rate. While the Yuan real effective exchange rate has deviated from equilibrium, and it is sticky, taking over five years to correct 50% of the short run misalignment, it does not appear to have been consistently undervalued as has been widely argued.Chinese Yuan, Exchange Rate, Misalignment, BEER, Behavioral, Cointegration, ARIMA, VECM, FGLS.
Modelling the magnetic activity and filtering radial velocity curves of young Suns : the weak-line T Tauri star LkCa 4
No full textSGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. SHPA acknowledges financial support from CNPq, CAPES and Fapemig.We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri star LkCa 4 within the Magnetic Topologies of Young Stars and the Survival of close-in giant Exoplanets (MaTYSSE) programme, involving ESPaDOnS at the Canada–France–Hawaii Telescope. Despite an age of only 2 Myr and a similarity with prototypical classical T Tauri stars, LkCa 4 shows no evidence for accretion and probes an interesting transition stage for star and planet formation. Large profile distortions and Zeeman signatures are detected in the unpolarized and circularly polarized lines of LkCa 4 using Least-Squares Deconvolution (LSD), indicating the presence of brightness inhomogeneities and magnetic fields at the surface of LkCa 4. Using tomographic imaging, we reconstruct brightness and magnetic maps of LkCa 4 from sets of unpolarized and circularly polarized LSD profiles. The large-scale field is strong and mainly axisymmetric, featuring a ≃2 kG poloidal component and a ≃1 kG toroidal component encircling the star at equatorial latitudes – the latter making LkCa 4 markedly different from classical T Tauri stars of similar mass and age. The brightness map includes a dark spot overlapping the magnetic pole and a bright region at mid-latitudes – providing a good match to the contemporaneous photometry. We also find that differential rotation at the surface of LkCa 4 is small, typically ≃5.5 times weaker than that of the Sun, and compatible with solid-body rotation. Using our tomographic modelling, we are able to filter out the activity jitter in the radial velocity curve of LkCa 4 (of full amplitude 4.3 km s−1) down to an rms precision of 0.055 km s−1. Looking for hot Jupiters around young Sun-like stars thus appears feasible, even though we find no evidence for such planets around LkCa 4.Peer reviewe
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Colonel T. Alan Bennett and Major C. Yuan
No full textThis is a photograph of Colonel T. Alan Bennett (right), U.S. Army Air Forces, sitting next to Major C. Yuan, Chinese-American Composite Wing (left). They are sitting outside and talking, with their hands clasped in their laps. Bennett is wearing his summer service uniform, and the man on the right is wearing a leather jacket
Colonel T. Alan Bennett and Major C. Yuan
No full textThis is a photograph of Colonel T. Alan Bennett (right), U.S. Army Air Forces, sitting next to Major C. Yuan, Chinese-American Composite Wing (left). They are sitting outside and talking, with their hands clasped in their laps. Bennett is wearing his summer service uniform, and the man on the right is wearing a leather jacket
Editorial: Biofilm formation and quorum sensing of foodborne microorganism
No full textBiofilms are a self-protection growth pattern of microorganisms and are commonly defined as communities of microbial cells enclosed in hydrated extracellular polymeric substances and adherent to surfaces (Sauer et al., 2007). Biofilm cells are more resistant to cleaning and disinfection processes in the food industry (Yuan et al., 2021). Therefore, biofilms represent an important source of contamination of raw materials and processed products, posing a serious threat to food safety.Full Tex
Effect of Shen-yuan on haemodynamic and anti-inflammatory factors in a porcine model of acute myocardial infarction
No full textWe previously found that Shen-yuan exerted cardioprotective activities in rodent and porcine myocardial infarction (MI) models because of its antioxidative and anti-apoptotic properties. This study aimed to investigate whether the cardioprotective effects from Shen-yuan are due to regulation of haemodynamics and inflammation in a porcine model of acute MI. Myocardial infarction was induced by left anterior descending coronary artery ligation. Low, moderate, and high doses of Shen-yuan treatment were started 1 week before MI and continued for 2 weeks after MI. Whole blood viscosity at 15 s(-1) and platelet aggregation rate were significantly increased in the MI group, but were markedly attenuated by high doses of Shen-yuan. A moderate dose of Shen-yuan also restored decreased values of the peak rise of left ventricular pressure and left ventricular mean pressure after MI. Expression of the T regulatory cell marker forkhead box P3 (Foxp3)(+) at 14 days post-MI was lower than that in the sham-operated group. Foxp3 was significantly up-regulated in the infarcted and non-infarcted zones of the left ventricle in the Shen-yuan treatment groups. Plasma interleukin-10 and transforming growth factor-beta levels were elevated by Shen-yuan treatment in a dose-dependent manner. Shen-yuan elicits cardiovascular protection by its haemodynamic stabilization and anti-inflammatory effects after onset of MI in a porcine model.National Science and Technology Major Project of China for 'Major New Drugs Innovation and Development' [2009ZX09103-441]SCI(E)[email protected]
Thalictrum panzhihuaense (Ranunculaceae) is placed in synonymy with T. glandulosissimum, with reduction of T. tsaii to T. glandulosissimum var. tsaii
No full textZeng, You-Pai, Yuan, Qiong, Yang, Qin-Er (2021): Thalictrum panzhihuaense (Ranunculaceae) is placed in synonymy with T. glandulosissimum, with reduction of T. tsaii to T. glandulosissimum var. tsaii. Phytotaxa 520 (1): 1-20, DOI: 10.11646/phytotaxa.520.1.1, URL: http://dx.doi.org/10.11646/phytotaxa.520.1.
Phenomenology of Littlest Higgs Model with T-parity: including effects of T-odd fermions
No full textWe study the collider phenomenology of a littlest Higgs model with T parity. We first stress the important role of the T-odd SU(2)-doublet fermions (introduced to make the model T-parity invariant) in high energy scattering processes, such as qq? ?WH+WH- where WH± are the T-odd partners of W bosons. Because the mass of the T-odd SU(2)-doublet fermions cannot be too heavy to be consistent with low energy data, they can be copiously produced at the CERN Large Hadron Collider (LHC). Therefore, we study the collider phenomenology of the model with emphasis on the contributions of the T-odd fermion to the production of the heavy T-parity partners (either bosons or fermions) of the usual particles at the LHC. The production cross sections and the decay branching ratios of the new heavy particles are classified and various experimental signatures are discussed.<br/
Thalictrum bouffordii Y. P. Zeng, Q. Yuan & Q. E. Yang 2021
No full textKey to Thalictrum bouffordii and its closely similar species 1a. Stamens 6‒7 mm long; achenes pubescent........................................................................................................................................2 1b. Stamens 3‒5 mm long; achenes glabrous...........................................................................................................................................3 2a. Sepals pubescent abaxially; filaments purplish................................................................................................................ T. bouffordii 2b. Sepals glabrous; filaments white................................................................................................................................... T. xinningense 3a. Inflorescence a thyrse; stamens 14‒20............................................................................................................................. T. nepalense 3b. Inflorescence dichotomous and corymbiform; stamens 40‒60....................................................................................... T. javanicumPublished as part of Zeng, You-Pai, Yuan, Qiong & Yang, Qin-Er, 2021, Thalictrum bouffordii (Ranunculaceae), a new species from the Qionglai mountains region in western Sichuan, China, pp. 18-28 in Phytotaxa 510 (1) on page 27, DOI: 10.11646/phytotaxa.510.1.2, http://zenodo.org/record/542624
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