Liver dysfunction in patients with IBD under immunosuppressive treatment: do we need to fear?

International audienc

Diablo Canyon power plant site ecological study Quarterly Report no. 17: July 1 - September 30, 1977

During the quarter a total of 38 random 30-m2 and 152 random 1/4-m2 subtidal stations were surveyed. Red abalone, Haliotis rufescens, densities remained very low. There was a continued decline in densities of giant red sea urchins, Strongylocentrotus franciscanus, in Diablo Cove as well as the North Control area. The annual shore census of bull kelp, Nereocystis luetkeana, revealed the lowest number of plants in the surface canopy in Diablo Cove since 1973. The subtidal station data supported this observation. Sea otter, Enhydra lutris, observations were continued. A small group of otters continued to raft in the Cove east of Lion Rock. Some of these otters probably forage as far south as South Cove. The survey of 11 random intertidal stations completed our Upwelling sampling effort. (16pp.

Wage-Price Dynamics and Deflation in Hong Kong

This paper provides empirical evidence on the dynamics of prices and wages in Hong Kong. The results imply that the deflation in Hong Kong since 1997 can be understood using a conventional macroeconomic framework wherein foreign influences constitute the basic underlying shocks, and adjustment processes in domestic wages and prices determine the details of the transmission mechanism. Our results indicate that the decline in local nominal prices owes much to declining prices of imported intermediate goods. The negative output gap and the increase in unemployment experienced during the deflation period also have their origin in foreign shocks, but the domestic wage adjustment process constitutes an important contributing factor.Deflation, wage-price dynamics, Hong Kong data.

Global Action-Angle Variables for Non-Commutative Integrable Systems

In this paper we analyze the obstructions to the existence of global action-angle variables for regular non-commutative integrable systems (NCI systems) on Poisson manifolds. In contrast with local action-angle variables, which exist as soon as the fibers of the momentum map of such an integrable system are compact, global action-angle variables rarely exist. This fact was first observed and analyzed by Duistermaat in the case of Liouville integrable systems on symplectic manifolds and later by Dazord-Delzant in the case of non-commutative integrable systems on symplectic manifolds. In our more general case where phase space is an arbitrary Poisson manifold, there are more obstructions, as we will show both abstractly and on concrete examples. Our approach makes use of a few new features which we introduce: the action bundle and the action lattice bundle of the NCI system (these bundles are canonically defined) and three foliations (the action, angle and transverse foliation), whose existence is also subject to obstructions, often of a cohomological nature

Characterization of radially symmetric finite time blowup in multidimensional aggregation equations,

This paper studies the transport of a mass $\mu$ in $\real^d, d \geq 2,$ by a flow field $v= -\nabla K*\mu$. We focus on kernels $K=|x|^\alpha/ \alpha$ for $2-d\leq \alpha<2$ for which the smooth densities are known to develop singularities in finite time. For this range This paper studies the transport of a mass $\mu$ in $\real^d, d \geq 2,$ by a flow field $v= -\nabla K*\mu$. We focus on kernels $K=|x|^\alpha/ \alpha$ for $2-d\leq \alpha<2$ for which the smooth densities are known to develop singularities in finite time. For this range we prove the existence for all time of radially symmetric measure solutions that are monotone decreasing as a function of the radius, thus allowing for continuation of the solution past the blowup time. The monotone constraint on the data is consistent with the typical blowup profiles observed in recent numerical studies of these singularities. We prove monotonicity is preserved for all time, even after blowup, in contrast to the case $\alpha >2$ where radially symmetric solutions are known to lose monotonicity. In the case of the Newtonian potential ($\alpha=2-d$), under the assumption of radial symmetry the equation can be transformed into the inviscid Burgers equation on a half line. This enables us to prove preservation of monotonicity using the classical theory of conservation laws. In the case $2 -d < \alpha < 2$ and at the critical exponent $p$ we exhibit initial data in $L^p$ for which the solution immediately develops a Dirac mass singularity. This extends recent work on the local ill-posedness of solutions at the critical exponent.Comment: 30 page

Is There a Euro Effect on Trade? An Application of End-of-Sample Structural Break Tests for Panel Data

Whether trade has increased due to the Euro is a question at the heart of lively policy debates and academic research. We revisit the question with a new, more powerful econometric test for end-of-sample breaks to formally identify the timing and duration of the structural break implied by the ÒRose effectÓ on the Euro AreaÕs trade. We find a significant break in 1999Q1 when using a traditional gravity equa- tion, corroborating the general consensus in the literature. However, we find that this break is short lived. Furthermore, we show that the break can be explained both by the marked decrease in real interest rates across the Euro Area and by deepening European institutional integration.Gravity equation, International Trade, Common Currency, Structural break tests in panel data, Euro Area

Diablo Canyon power plant site ecological study Annual Report July 1, 1976 - June 30, 1977 and Quarterly Report no. 16 April 1, 1977 - June 30, 1977

More stations were surveyed during this report period than during any previous period. A total of 818 mandays was spent surveying 18 permanent and 67 random subtidal stations, 19 permanent and 50 random intertidal stations, and 64 sportfish catch-per-unit-of-effort stations, as well as conducting corollary laboratory work. In the subtidal areas, Laminaria dentigera and Pterygophora californica, both important subsurface kelp species, increased in their combined total numbers from the 1976 survey. However, Nereocystis luetkeana, the bull kelp, declined substantially in all study areas. Population trends of many of the dominant subtidal macro-invertebrates have varied depending on the species and on the type of method utilized. Regression analyses have been performed on selected species for numbers versus depth. Red algal abundance and diversity appear to have increased in both subtidal study areas. Of the three observation areas, sea otters were observed least frequently in Diablo Cove. However, there continues to be fresh evidence of otter foraging within Diablo Cove. Several seasons' data for intertidal algae and invertebrates have been summarized for one study area. While the algae biomass shows a fairly clear seasonality of abundance, the trends in numbers of the six invertebrate species considered are not as well defined. Because of high variability in the data, the sportfish catch-per-unit-of-effort and hook-and-line study was cancelled in December. Populations of intertidal red and black abalones, Haliotis rufescens and H. cracherodii, respectively, appear to have remained fairly stable during the 1976-77 period. Two other ancillary studies were also terminated during this period: interviews of commercial abalone and urchin fishermen, and observations of foam in Diablo Cove. (107pp.

Mendocino power plant site ecological study, Quarterly Report No. 5; July 1 - September 30, 1972

This report is the fifth quarterly report submitted in partial fulfillment of Research Contract No. S-1902 between the Department of Fish and Game and the Pacific Gas and Electric Company. Through this contract the Department of Fish and Game is to conduct a pre-operational ecological study to establish a base line inventory of the marine biota with special reference to fish and to abalone, including food chains. Quarterly reports will be followed by annual reports. The first annual report will cover all work from September 1971 through December 1972. Full tables and species lists will be included in each annual report

Mendocino Power Plant site ecological study annual report; July 1, 1971 to December 31, 1972

This report is the first annual report submitted in partial fulfillment of Research Contract No. S-1902 between the Department of Fish and Game and the Pacific Gas and Electric Company. Through this contract the Department of Fish and Game is to conduct a preoperational ecological study to establish a base line inventory of the marine biota with special reference to fish and to abalone, including food chains. This first annual report covers all work from September 1971 through December 1972. This annual report covers the first 18 month period of the project from July 1, 1971 through December 31, 1972. The report includes results (discussion and tables) of our subtidal, intertidal, sportfishery, fish collection, fish food habit, and plankton studies. The quarterly report for October 1 to December 31, 1972 is included herein and these data are incorporated in this annual report. (86pp.