56 Gb/s multi-band CAP for data center interconnects up to an 80 km SMF

We present the first (to the best of our knowledge) experimental demonstration of a 56 Gb/s multi-band carrierless amplitude and phase modulation (CAP) signal transmission over an 80-km single-mode fiber link with zero overhead pre-FEC signal recovery and enhanced timing jitter tolerance for optical data center interconnects.

(Table 1) Lithology, mineralogy, and physical properties of Cretaceous cherts and porcellanites at DSDP Hole 56-436

Cretaceous chert and porcellanite recovered at Site 436, east of northern Honshu, Japan, are texturally and mineralogically similar to siliceous rocks of comparable age at Sites 303, 304, and 307 in the northwest Pacific. These rocks probably were formed by impregnation of the associated pelagic clay with locally derived silica from biogenic and perhaps some volcanic debris. Fine horizontal laminations are the only primary sedimentary structures, suggesting minimal reworking and transport. Collapse breccias and incipient chert nodules are diagenetic features related to silicification and compaction of the original sediment. Disordered opal-CT (d[101] = 4.09 Å) and microgranular quartz (crystallinity index < 1.0) are the two common silica minerals present. Some samples show quartz replacing this poorly ordered opal- CT, supporting the notion that opal-CT does not become completely ordered (i.e., d[101] = 4.04 Å) in some cases before being converted to quartz. The present temperature calculated for the depth of the shallowest chert and porcellanite at this site is 30 °C; this may represent the temperature of conversion of opal-CT to quartz. High reflection coefficients (0.29-0.65) calculated for the boundary between chert-porcellanite and clay-claystone support the common observation that chert is a strong seismic reflector in deep-sea sedimentary sections.

Coarse-silt-fraction mineralogy at DSDP Legs 56 and 57 Holes

Soviet sedimentologists use the term "coarse silt" to denote the size fraction 0.1 to 0.05 mm (50-100 µm). Petelin (1961) has shown that this fraction is most diagnostic for terrigeneous and volcanogenic mineral assemblages and provinces in Recent deep-sea sediments, because of its greatest variability of both heavy and light non-opaque minerals, which may be easily identified by the common immersion method. We believe that the fraction is suitable for mineralogical study of unconsolidated and friable sediments from DSDP cores as well, if the objective is to investigate their source area and transporation tracks. In the case of fine-grained oceanic sediments, mineral composition of the coarse silt does not differ markedly from that of the "coarse fraction" (>62 µm).

Geochemistry of the Japan Trench sediments at DSDP Legs 56-57 Holes

The main objective of this investigation was to study distribution of main chemical constituents and several minor elements in sediment sections drilled during DSDP Legs 56 and 57 in the Japan Trench, in order to infer geochemical features of different lithologic types of sediments, and to find out how the geochemistry is associated with major lithologic constituents, such as terrigenous detrital matter, clay, volcanic ash, and biogenic particles. The geochemical data may help to indicate the nature of the sediments and to interpret sedimentation processes. The analyzed samples seem to be representative of most lithologic units, sub-units, and sediment types drilled at all sites on both legs, except for some shallow-water deposits at Sites 438 and 439. We analyzed bulk-sediment composition by X-ray fluorescence (Kuzmina and Turanskaya) and routine wet-chemical methods (Mikhailov); amorphous SiO2, extracted in a boiling sodium carbonate solution (Analythical Laboratory, P. P. Shirshov Institute of Oceanology); Cr, Zn, Cu, Ni, Co, and Al by atomic absorption (Gordeev); and Sn, Pb, Zn, Cu, Ni, Co, Cr, V, B, and Ag by quantitative spectrographic analyses in both bulk samples and granulometric fractions (Mikhailov). In addition, Fe, Ti, Mn, and CaCO3 have been determined in selected samples by routine wet-chemical methods (Analytical Laboratory, P. P. Shirshov Institute of Oceanology). Murdmaa was responsible for interpretation of the results.

Peter Gansen: Metaphorisches Denken von Kindern, Theoretische und empirische Studien zu einer Pädagogischen Metaphorologie, (Erziehung – Schule – Gesellschaft, Bd. 56) Würzburg: Ergon 2010 [Rezension]

Rezension von: Peter Gansen: Metaphorisches Denken von Kindern, Theoretische und empirische Studien zu einer Pädagogischen Metaphorologie, (Erziehung – Schule – Gesellschaft, Bd. 56), Würzburg: Ergon 2010 (540 S.; ISBN 978-3-89913-742-2)

¿Y qué misterio tendrá el número siete ? hoy a las 12:34: 56 del 7/8/90, la secuencia perfecta : cábalas para el presidente Gaviria

Fondo Margaritainés Restrepo

Resolución 56 del 20 de mayo de 2009: ¿Que efectos jurídicos produce el acto de inscripción del nombramiento de un liquidador durante el tiempo en que adquiere su firmeza y no ha sido objeto de impugnación? ¿Es susceptible de inscripción en el registro mercantil un acto producido por un liquidados cuya inscripción de nombramiento aun no esta en firme?

Servicios registrales

Seventy-Eighth Annual Report of the Public Service Commission of South Carolina 1955-56

Each year the South Carolina Public Service Commission reports to the Office of State Budget that includes the agency's mission, goals and objectives to accomplish the mission, and performance measures regarding the goals and objectives.

Estudo comparativo de coeficientes de cultura (Kc) para o manejo de irrigação do milho obtidos experimentalmente e estimados pelo manual FAO/56.

2016