in this study, anion-exchange chromatography was used to purify factor vii and factor ix from prothrombin complex (ppsb), which contains coagulation factors ii, vii, ix and x. for this purpose, deae-sepharose cl-6b gel , pharmacia column xk-26 , high flow rate and two stepwise gradients with phosphate citrate buffer were used. the yield of the two lyophylized products, factor vii and factor ix ...

We describe and analyze the joint source/channel coding properties of a class of sparse graphical codes based on compounding a low-density generator matrix (LDGM) code with a low-density parity check (LDPC) code. Our first pair of theorems establish that there exist codes from this ensemble, with all degrees remaining bounded independently of block length, that are simultaneously optimal as bot...

REACT estimators for the mean of a linear model involve three steps: transforming the model to a canonical form that provides an economical representation of the unknown mean vector, estimating the risks of a class of candidate linear shrinkage estimators, and adaptively selecting the candidate estimator that minimizes estimated risk. When the mean vector is smooth, the desired canonical form o...

The theory of adaptive estimation and oracle inequalities for the case of Gaussian-shift–finite-interval experiments has made significant progress in recent years. In particular, sharp-minimax adaptive estimators and exact exponential-type oracle inequalities have been suggested for a vast set of functions including analytic and Sobolev with any positive index as well as for Efromovich–Pinsker ...

We consider in this paper a Gaussian sequence model of observations Yi, i ≥ 1 having mean (or signal) θi and variance σi which is growing polynomially like i γ , γ > 0. This model describes a large panel of inverse problems. We estimate the quadratic functional of the unknown signal ∑ i≥1 θ 2 i when the signal belongs to ellipsoids of both finite smoothness functions (polynomial weights i, α > ...

Costa’s “writing on dirty paper” capacity result establishes that full state pre-cancellation can be attained in Gel’fand-Pinsker channel with additive state and additive Gaussian noise. The “carbon copy onto dirty paper” channel is the extension of Costa’s model to the compound setting: M receivers each observe the sum of the channel input, Gaussian noise and one of M Gaussian state sequences ...

We prove a single achievability theorem that recovers many achievability results in network information theory as simple corollaries. Our result is enabled by many novel elements such as a generalized network model that includes multiple sources and channels interacting with each other, a unified typicality constraint that generalizes cost and distortion constraints, a unified coding strategy t...

background: factor v g1691a (fv leiden), fii ga20210, and methylenetetrahydrofolate reductase (mthfr) c677t mutations are the most common genetic risk factors for thromboembolism in the western countries. however, there is rare data in iran about cerebral venous and sinus thrombosis (cvst) patients. the aim of this study was to evaluate the frequency of common genetic thrombophilic factors in c...