Proceedings of the annual congress of correction.

Proceedings for 1884 and 1885 include report of conference of prison officials, Chicago, 1884, separately paged.

Annual report of the Commissioners of Public Charities and Correction of the City of New York.

Mode of access: Internet.

Providing for consideration of H. Res. 571, expressing the sense of the House of Representatives that the deployment of United States forces in Iraq be terminated immediately, and providing for consideration of H. Con. Res. 308, directing the Clerk of the House of Representatives to make a technical correction in the enrollment of H.R. 3058 : report (to accompany H. Res. 572).

"November 18, 2005."

Six months in a house of correction, or, The narrative of Dorah Mahony who was under the influence of the Protestants about a year, and an inmate of the house of correction, in Leverett St. Boston, Massachusetts, nearly six months in the year of 18-- : with some preliminary suggestions by the Committee of Publication.

Mode of access: Internet.

Proceedings of the ... annual Conference of Charities and Correction held at ...

Mode of access: Internet.

The Ohio Bulletin of Charities and Correction

Vol.1-2 Were Published as Circular(S) Nos.1-9, 1891-1896. (the Title 0ohio Bulletin of Charities and Correction0 Begin0s with Circular No.6)

Proceedings of the national conference of charities and correction

Mode of access: Internet.

The Indiana bulletin of charities and correction.

Some issues have also a distinctive title.

Review and correction procedures for the metropolitan map series /

Mode of access: Internet.

The GBF/DIME system : description and uses : GBF/DIME system, CUE, correction, update, extension.

Issued Februrary 1978.

Speech correction at home

Mode of access: Internet.

Scientific water correction.

Mode of access: Internet.

A novel phantom and method for comprehensive 3-dimensional measurement and correction of geometric distortion in magnetic resonance imaging

A phantom that can be used for mapping geometric distortion in magnetic resonance imaging (MRI) is described. This phantom provides an array of densely distributed control points in three-dimensional (3D) space. These points form the basis of a comprehensive measurement method to correct for geometric distortion in MR images arising principally from gradient field non-linearity and magnet field inhomogeneity. The phantom was designed based on the concept that a point in space can be defined using three orthogonal planes. This novel design approach allows for as many control points as desired. Employing this novel design, a highly accurate method has been developed that enables the positions of the control points to be measured to sub-voxel accuracy. The phantom described in this paper was constructed to fit into a body coil of a MRI scanner, (external dimensions of the phantom were: 310 mm x 310 mm x 310 mm), and it contained 10,830 control points. With this phantom, the mean errors in the measured coordinates of the control points were on the order of 0.1 mm or less, which were less than one tenth of the voxel's dimensions of the phantom image. The calculated three-dimensional distortion map, i.e., the differences between the image positions and true positions of the control points, can then be used to compensate for geometric distortion for a full image restoration. It is anticipated that this novel method will have an impact on the applicability of MRI in both clinical and research settings. especially in areas where geometric accuracy is highly required, such as in MR neuro-imaging. (C) 2004 Elsevier Inc. All rights reserved.

Geometric distortion in clinical MRI systems - Part II: correction using a 3D phantom

In this paper, we present the correction of the geometric distortion measured in the clinical magnetic resonance imaging (MRI) systems reported in the preceding paper (Part 1) using a 3D method based on the phantom-mapped geometric distortion data. This method allows the correction to be made on phantom images acquired without or with the vendor correction applied. With the vendor's 2D correction applied, the method corrects for both the residual geometric distortion still present in the plane in which the correction method was applied (the axial plane) and the uncorrected geometric distortion along the axis non-nal to the plane. The evaluation of the effectiveness of the correction using this new method was carried out through analyzing the residual geometric distortion in the corrected phantom images. The results show that the new method can restore the distorted images in 3D nearly to perfection. For all the MRI systems investigated, the mean absolute deviations in the positions of the control points (along x-, y- and z-axes) measured on the corrected phantom images were all less than 0.2 mm. The maximum absolute deviations were all below similar to0.8 mm. As expected, the correction of the phantom images acquired with the vendor's correction applied in the axial plane performed equally well. Both the geometric distortion still present in the axial plane after applying the vendor's correction and the uncorrected distortion along the z-axis have all been restored. (C) 2004 Elsevier Inc. All rights reserved.

Quantum-error correction on linear-nearest-neighbor qubit arrays

A quantum circuit implementing 5-qubit quantum-error correction on a linear-nearest-neighbor architecture is described. The canonical decomposition is used to construct fast and simple gates that incorporate the necessary swap operations allowing the circuit to achieve the same depth as the current least depth circuit. Simulations of the circuit's performance when subjected to discrete and continuous errors are presented. The relationship between the error rate of a physical qubit and that of a logical qubit is investigated with emphasis on determining the concatenated error correction threshold.