Studja taktyczne z historji wojen polskich 1918-21

Mode of access: Internet.

Karl Liebknecht; politische aufzeichnungen aus seinem nachlass, geschrieben in den jahren 1917-1918,

Mode of access: Internet.

Census of the Philippine Islands taken under the direction of the Philippine Legislature in the year 1918.

Director: Ignacio Villamor, v.1 & Appendix. Felipe Buencamino, sr., v.2-4.

Fifty years of aerospace medicine; its evolution since the founding of the United States Air Force School of Aerospace Medicine in January 1918.

Includes bibliographies.

Ludendorff's own story, August 1914-November 1918; th great war from the siege of Liege to the signing of the armistice as viewed from the Grand headquarters of the German army,

Mode of access: Internet.

The first world war, 1914-1918; personal experiences of Lieut.-Col. C. à Court Repington.

Mode of access: Internet.

Die pilze und ihre volkswirtschaftliche bedeutung. Vortrag gehalten am. 9. märz 1918 auf der versammlung der Senckenbergischen naturforschenden gesellschaft in Frankfurt a.M.,

Mode of access: Internet.

El papel de la conmemoración del Cincuenta Aniversario la Reforma Universitaria de 1918 en la recomposición del movimiento estudiantil

Fil: Bonavena, Pablo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

A redescription of Atopacanthus dentatus Hussakof and Bryant, 1918 (Acanthodii, Ischnacanthidae)

The holotype specimen of the ischnacanthid acanthodian Alopacanthus dentatus comprises most of the posterior half of a dentigerous jaw bone, rather than a fragment from the middle of the jaw as was previously believed. A new diagnosis and revised description for the taxon are based on the holotype from the Rhinestreet Shale (Frasnian) and other specimens front the North Evans and Genundewa limestones (early Frasnian) of the Genesee Formation (late Givetian-early Frasnian); all of: these dentigerous jaw bones were collected near Hamburg, New York state, U.S.A. An emended diagnosis for Atopacanthus clarifies the differences between it and other ischnacanthid genera.

Synthesis and characterization of nano-hetero-structured dy doped CeO2 solid electrolytes using a combination of spark plasma sintering and conventional sintering

Doped ceria (CeO2) compounds are fluorite-type oxides that show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, considerable interest has been shown in application of these materials for low (500 degrees-650 degrees C) temperature operation of solid oxide fuel cells (SOFCs). To improve the conductivity in dysprosium (Dy) doped CeO2, nano-size round shape particles were prepared using a coprecipitation method. The dense sintered bodies with small grain sizes (< 300 nm) were fabricated using a combined process of spark plasma sintering (SPS) and conventional sintering (CS). Dy-doped CeO2 sintered body with large grains (1.1 mu m) had large micro-domains. The conductivity in the sintered body was low (-3.2 S/cm at 500 degrees C). On the other hand, the conductivity in the specimens obtained by the combined process was considerably improved. The micro-domain size in the grain was minimized using the present process. It is concluded that the enhancement of conductivity in dense specimens produced by the combined process (SPS+CS) is attributable to the microstructural changes within the grains.