Mitteilungen der Geographischen gesellschaft (fu r Thu ringen) zu Jena.

List of members in v. 1, 4, 6, 11, 16, 25.

Der Hochverraths-Prozess wider Liebknecht, Bebel, Hepner, vor dem Schwurgericht zu Leipzig vom 11. bis 26 märz 1872.

Mode of access: Internet.

Journals of Ralph Waldo Emerson, 1820-1872 [1876] ed.

Mode of access: Internet.

La campaña carlista (1872 á 1876)

Vol.2 published by Imp. Editorial Barcelonesa.

Stanisław Moniuszko (1819-1872)

Includes index.

Mining laws of 1872 and 1989 : hearing before the Subcommittee on Mineral Resources Development and Production of the Committee on Energy and Natural Resources, United States Senate, One Hundred First Congress, first session, on S. 1126 ... June 7, 1989.

"September 13, 1990".

Notes by a naturalist. An account of observations made during the voyage of H.M.S. "Challenger" around the world in the years 1872-1876. By H. N. Moseley.

"Memoir ..." signed: G. C. B.

U.S. Grant and the colored people. : His wise, just, practical, and effective friendship thoroughly vindicated by incontestable facts in his record from 1862 to 1872. : Words of truth and soberness! He who runs may read and understand!! Be not deceived, only truth can endure!!!.

Text printed in two columns.

Chambre sépulcrale avec fresques découverte en 1872 près de Kertch ...

Extract from Report for 1872 of Russia. I. Arkheologicheskaia kommissïia.

An oration, delivered before the American Philosophical Society, held in Philadelphia on the 27th of February, 1786; containing an enquiry into the influence of physical causes upon the moral faculty ...

Microfilmed for preservation

Notes by a naturalist. An account of observations made during the voyage of H. M. S. "Challenger" round the world in the years 1872-1876 ...

Mode of access: Internet.

Aportes de la Asociación Rural del Uruguay a la viticultura en Uruguay (1872-1900)

En este artículo se analizan desde una perspectiva agronómica los contenidos de los discursos de los viticultores y técnicos en Uruguay para el periodo 1872-1900, presentes en la Revista de la Asociación Rural del Uruguay. Los contenidos se organizan según dimensiones del manejo de la viña en la etapa de campo. Se expresa la preponderancia de los primeros actores en la constitución de la temprana viticultura nacional -productores pertenecientes a una elite empresarial de inmigrantes- al adaptar sus conocimientos previos desde procesos de experimentación. Se indaga en el papel que cumplió la Asociación Rural del Uruguay en esta fase

An inverse methodology for high-frequency RF coil design for MRI with de-emphasized B-1 fields

An inverse methodology for the design of biologically loaded radio-frequency (RF) coils for magnetic resonance imaging applications is described. Free space time-harmonic electromagnetic Green's functions and de-emphasized B-1 target fields are used to calculate the current density on the coil cylinder. In theory, with the B-1 field de-emphasized in the middle of the RF transverse plane, the calculated current distribution can generate an internal magnetic field that can reduce the central overemphasis effect caused by field/tissue interactions at high frequencies. The current distribution of a head coil operating at 4 T (170 MHz) is calculated using an inverse methodology with de-emphasized B-1. target fields. An in-house finite-difference time-domain routine is employed to evaluate B-1 field and signal intensity inside a homogenous cylindrical phantom and then a complete human head model. A comparison with a conventional RF birdcage coil is carried out and demonstrates that this method can help in decreasing the normal bright region caused by field/tissue interactions in head images at 170 MHz and higher field strengths.

A time-harmonic target-field method for designing unshielded RF coils in MRI

Time-harmonic methods are required in the accurate design of RF coils as operating frequency increases. This paper presents such a method to find a current density solution on the coil that will induce some desired magnetic field upon an asymmetrically located target region within. This inverse method appropriately considers the geometry of the coil via a Fourier series expansion, and incorporates some new regularization penalty functions in the solution process. A new technique is introduced by which the complex, time-dependent current density solution is approximated by a static coil winding pattern. Several winding pattern solutions are given, with more complex winding patterns corresponding to more desirable induced magnetic fields.