Annual Report of the Municipal Officers for the Town of Palmyra, Maine Municipal Year 2015

Original scanned reports courtesy of Palmyra Historical Societ

Reclassification and subtyping of so-called malignant fibrous histiocytoma of bone: comparison with cytogenetic features

<p>Abstract</p> <p>Background</p> <p>The diagnostic entity malignant fibrous histiocytoma (MFH) of bone is, like its soft tissue counterpart, likely to be a misnomer, encompassing a variety of poorly differentiated sarcomas. When reviewing a series of 57 so-called MFH of bone within the framework of the EuroBoNeT consortium according to up-to-date criteria and ancillary immunohistochemistry, a fourth of all tumors were reclassified and subtyped.</p> <p>Methods</p> <p>In the present study, the cytogenetic data on 11 of these tumors (three myoepithelioma-like sarcomas, two leiomyosarcomas, one undifferentiated pleomorphic sarcoma with incomplete myogenic differentiation, two undifferentiated pleomorphic sarcomas, one osteosarcoma, one spindle cell sarcoma, and one unclassifiable biphasic sarcoma) are presented.</p> <p>Results</p> <p>All tumors were high-grade lesions and showed very complex karyotypes. Neither the overall pattern (ploidy level, degree of complexity) nor specific cytogenetic features distinguished any of the subtypes. The subgroup of myoepithelioma-like sarcomas was further investigated with regard to the status of the <it>EWSR1 </it>and <it>FUS </it>loci; however, no rearrangement was found. Nor was any particular aberration that could differentiate any of the subtypes from osteosarcomas detected.</p> <p>Conclusions</p> <p>chromosome banding analysis is unlikely to reveal potential genotype-phenotype correlations between morphologic subtypes among so-called MFH of bone.</p

National survey of methicillin-resistant staphylococcus aureus in Belgian hospitals: Detection methods, prevalence trends and infection control measures

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Short recurrences for computing extended Krylov bases for Hermitian and unitary matrices

It is well known that the projection of a matrix A onto a Krylov subspace results in a matrix of Hessenberg form. We show that the projection of the same matrix A onto an extended Krylov subspace, i.e. a succesion of positive and negative powers of A multiplied with a starting vector, is a matrix of so-called extended Hessenberg form which can be characterized uniquely by its QR-factorization. In case A is a Hermitian or unitary matrix, this extended Hessenberg matrix is banded, resulting in short recurrence relations. For the unitary case, coupled two term recurrence relations are derived of which the coefficients capture all information necessary for a sparse factorization of the corresponding extended Hessenberg matrix. This generalizes the approach used by Watkins to retrieve the CMV-form for unitary matrices.nrpages: 23status: publishe

Short recurrences for computing orthonormal (extended) Krylov bases

status: publishe

Short recurrences for computing extended Krylov bases for Hermitian and unitary matrices

© 2014, Springer-Verlag Berlin Heidelberg. It is well known that the projection of a matrix $$A$$A onto a Krylov subspace span $$\left\{ \mathbf {h}, A\mathbf {h}, A^2\mathbf {h}, \ldots , A^{k-1}\mathbf {h}\right\}$$h,Ah,A2h,…,Ak-1h, with $$A \in \mathbb {C}^{n \times n}$$A∈Cn×n and $$\mathbf {h} \in \mathbb {C}^n$$h∈Cn, results in a Hessenberg matrix. We show that the projection of the matrix $$A$$A onto an extended Krylov subspace, which is of the form span $$\left\{ A^{-k_r}\mathbf {h}, \ldots , A^{-2}\mathbf {h},A^{-1}\mathbf {h}, \mathbf {h}, A\mathbf {h}, A^2 \mathbf {h}, \ldots , A^{k_\ell } \mathbf {h} \right\}$$A-krh,…,A-2h,A-1h,h,Ah,A2h,…,Akℓh, is a matrix of so-called extended Hessenberg form which can be characterized uniquely by its $$QR$$QR-factorization. This $$QR$$QR-factorization will be presented by means of a pattern of $$2 \times 2$$2×2 unitary rotations. We will show how this rotation pattern leads to new insights and allows to elegantly predict the structure of the matrix. In case $$A$$A is Hermitian or unitary, this extended Hessenberg matrix is banded and structured, allowing the design of short recurrence relations. For the unitary case, coupled two term recurrence relations are derived of which the coefficients capture all information necessary for a sparse factorization of the corresponding extended Hessenberg matrix.status: publishe

On an economic Arnoldi method for BML-matrices

Matrices whose adjoint is a low rank perturbation of a rational function of the matrix naturally arise when trying to extend the well known Faber-Manteuffel theorem [8,9], which provides necessary and sufficient conditions for the existence of a short Arnoldi recurrence. We show that an orthonormal Krylov basis for this class of matrices can be generated by a short recurrence relation based on GMRES residual vectors. These residual vectors are computed by means of an updating formula. Furthermore, the underlying Hessenberg matrix has an accompanying low rank structure, which we will investigate closely.status: publishe

Community associated methicillin-resistant Staphylococcus aureus.

Community associated methicillin resistant Staphylococcus aureus (CA-MRSA) is an emergent infectious pathogen that might become an important public-health problem. Indeed, unique strains of S. aureus that combine specific virulence factors with resistance against frequently used antibiotics have been associated with severe community acquired infections in otherwise healthy and often younger people. This is especially the case in the USA, were these strains now represent a major part of staphylococcal infections in the outpatient setting. But, severe infections with CA-MRSA strains have already been reported in Belgium as well. This article summarizes the current knowledge on CA-MRSA as an emergent pathogen and discusses its clinical management.Case ReportsJournal ArticleReviewinfo:eu-repo/semantics/publishe