Invariant Manifolds For Weak Solutions To Stochastic Equations 2000

France Since 1871 (HIST 276) The student protests of May 1968 in France were linked to international...

Fundamentals of Physics (PHYS 200) The discussion of four-vector in relativity continues but this ti...

Fundamentals of Physics (PHYS 200) The discussion of four-vector in relativity continues but this ti...

Fundamentals of Physics (PHYS 200) The four-vector is introduced that unifies space-time coordinates...

Fundamentals of Physics (PHYS 200) The four-vector is introduced that unifies space-time coordinates...

Frontiers/Controversies in Astrophysics (ASTR 160) One last key concept in Special Relativity is int...

Frontiers/Controversies in Astrophysics (ASTR 160) One last key concept in Special Relativity is int...

Professor Stephen Boyd, of the Electrical Engineering department at Stanford University, lectures on...

Michael Mauboussin - Harnessing the Power of Counterintuition, Dec 09 Michael Mauboussin, author o...

In mathematics, in particular in algebraic topology, the Hop...

In optics the Lagrange invariant is a measure of the light p...

The invariant chain is a special polypeptide involved in the...

In statistics, an invariant estimator is a criterion that ca...

In differential equations, the Laplace invariant of any of c...

In mathematics, a quasi-invariant measure μ with respect to...

In the mathematical theory of knots, the Kontsevich invarian...

Drug maintenance treatment (DMT) has only been recently introduced in France (methadone programmes in March 1995, buprenorphine prescriptions in ambulatory medicine in February 1996) in relation to risk reduction policies for HIV infection among intravenous drug users (IDUs). Impact of DMT was assessed in the period of inclusion (October 1995-December 1997) of a French cohort of patients HIV infected through intravenous drug use the MANIF 2000 study). Among the 429 patients, 48.2% were ex-IDUs, 20.3% were active users not in DMT and 31.5% were ...

OBJECTIVE: To describe the causes of hospitalization and mortality among the MANIF 2000 cohort study, composed of HIV-infected patients contaminated through intravenous drug use. METHOD: Data collection with a standardized questionnaires with clinical, biological, therapeutic and psycho-sociologic data on inclusion and every six months. Dates and causes of hospitalization and death were collected retrospectively by nurses from the hospital clinical records. Comparison were made using the chi(2) or Mann-Whitney tests with 5% significance thresho...

Some HIV-infected injecting drug users (IDUs) on drug abuse maintenance treatment have access to highly active antiretroviral therapy (HAART); this raises questions about the effects of individual treatments on the efficacy of HAART. The French Cohort Study of HIV-infected IDUs - MANIF-2000 - allowed one to assess whether buprenorphine differentially impacts efficacy of HAART. Of the 103 HAART-treated patients, (excluding active IDUs and patients on methadone), 20 were on buprenorphine substitution treatment and 83 were ex-IDUs. A linear regres...

BACKGROUND AND OBJECTIVES: Risk-taking behaviors differ among women and men injection drug users (IDU). GOAL: To specify the nature of sexual and drug risk-taking among women IDU and ex-IDU and how it relates to partner characteristics. DESIGN: A cross-sectional analysis of 324 HIV+ subjects enrolled into a prospective cohort study in Marseille, France. RESULTS: Women, as compared with men, were considerably more likely to report nonuse of condoms with a main partner (31% versus 12%). They were more likely to shoot with a partner at last inject...

The objective of this study was to estimate the relative impact of hospitalization for depressive syndrome (DS) on all causes of hospitalization and characterize individuals more likely to experience hospitalization for DS in the French cohort study, Manif 2000, of patients HIV infected through injection drug use. We selected all patients followed-up to the 24-month visit (C24) who missed no more than one visit. Using medical records, dates and causes of hospitalizations, were collected retrospectively. A Poisson regression model based on gener...

STUDY OBJECTIVE: To determine the influence of continued drug use and its perception by prescribing physicians on access to antiretroviral treatment among French HIV infected injection drug users (IDUs). DESIGN: Cross sectional including enrollment data (October 1995-1996) of the cohort study MANIF 2000. Access to treatment is compared in three groups: former IDUs (n = 68) and active IDUs whether or not this behaviour remains undetected (n = 38) or detected (n = 17) by physicians. SETTING: Hospital departments for specialist AIDS care in south ...

OBJECTIVES: To assess adherence to highly active antiretroviral therapies (HAART) in a cohort of French patients infected by HIV through injection drug use (IDU), and the impact on adherence of buprenorphine ambulatory drug maintenance treatment (DMT) which has been widely introduced since 1996. DESIGN: Adherence assessment at first visit after initiation of HAART in the MANIF2000 cohort study. METHODS: Patient's face-to-face and self-administered questionnaires. Univariate and logistic regression adjusted odds ratios (OR) to compare characteri...

Many proposed image watermarking techniques are sensitive to geometric distortions, such as rotation, scaling and translation. Geometric distortions, even by slight amount, can make watermark decoder disable. In this paper, a geometric invariant blind image watermarking is designed by utilizing the invariant Tchebichef moments. The detailed construction of invariant Tchebichef moments is described. Watermark is generated independent to the original image and is inserted into the perceptually significant invariant Tchebichef moments of original ...

Abstract. A theorem of J. Hersch (1970) states that for any smooth metric on S 2, with total area equal to 4p, the first nonzero eigenvalue of the Laplace operator acting on functions is less than or equal to 2 (this being the value for the standard round metric). For metrics invariant under the standard S 1-action on S 2, one can restrict the Laplace operator to the subspace of S 1-invariant functions and consider its spectrum there. The corresponding eigenvalues will be called invariant eigenvalues, and the purpose of this paper is to analyse...

Abstract This paper reviews the moving frame approach to the construction of the invariant variational bicomplex. Applications include explicit formulae for the Euler-Lagrange equations of an invariant variational problem, and for the equations governing the evolution of differential invariants under invariant submanifold flows.

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JO ~AO FARIA MARTINS AND TIMOTHY PORTER Abstract. We give an interpretation of Yetter's Invariant of manifolds M in terms ofthe homotopy type of the function space TOP( M, B(G)), where G is a crossed moduleand B(G) is its classifying space. From this formulation, there follows that Yetter'sinvariant depends only on the homotopy type of M, and the weak homotopy type of thecrossed module G. We use this interpretation to define a twisting of Yetter's Invariant by cohomology classes of crossed modules, defined as cohomology classes of their classif...

The loci of polarization states for which either the ellipticity alone or the azimuth alone remains invariant upon passing through an optical system are introduced. The cartesian equations of these two loci are derived in the complex plane in which the polarization states are represented. The equations are quartic and are conveniently expressed in terms of the elements of the Jones. matrix of the optical system. As an exple the loci are determined for a system composed of a pi/4 rotator followed by a quarter-wave retarder.