Pacific Neogene carbonate accumulation rates

I have compiled CaCO3 mass accumulation rates (MARs) for the period 0-25 Ma for 144 Deep Sea Drilling Project and Ocean Drilling Program drill sites in the Pacific in order to investigate the history of CaCO3 burial in the world's largest ocean basin. This is the first synthesis of data since the beginning of the Ocean Drilling Program. Sedimentation rates, CaCO3 contents, and bulk density were estimated for 0.5 Myr time intervals from 0 to 14 Ma and for 1 Myr time intervals from 14 to 25 Ma using mostly data from Initial Reports volumes. There is surprisingly little coherence between CaCO3 MAR time series from different Pacific regions, although regional patterns exist. A transition from high to low CaCO3 MAR from 23-20 Ma is the only event common to the entire Pacific Ocean. This event is found worldwide. The most likely cause of lowered pelagic carbonate burial is a rising sea-level trend in the early Miocene. The central and eastern equatorial Pacific is the only region with adequate drill site coverage to study carbonate compensation depth (CCD) changes in detail for the entire Neogene. The latitude-dependent decrease in CaCO3 production away from the equator is an important defining factor of the regional CCD, which shallows away from the equatorial region. Examination of latitudinal transects across the equatorial region is a useful way to separate the effects of changes in carbonate production ('productivity') from changes in bottom water chemistry ('dissolution') upon carbonate burial.

Comment on "Local accumulation times for source, diffusion, and degradation models in two and three dimensions" [J. Chem. Phys. 138, 104121 (2013)]

In a recent paper, Gordon, Muratov, and Shvartsman studied a partial differential equation (PDE) model describing radially symmetric diffusion and degradation in two and three dimensions. They paid particular attention to the local accumulation time (LAT), also known in the literature as the mean action time, which is a spatially dependent timescale that can be used to provide an estimate of the time required for the transient solution to effectively reach steady state. They presented exact results for three-dimensional applications and gave approximate results for the two-dimensional analogue. Here we make two generalizations of Gordon, Muratov, and Shvartsman’s work: (i) we present an exact expression for the LAT in any dimension and (ii) we present an exact expression for the variance of the distribution. The variance provides useful information regarding the spread about the mean that is not captured by the LAT. We conclude by describing further extensions of the model that were not considered by Gordon,Muratov, and Shvartsman. We have found that exact expressions for the LAT can also be derived for these important extensions...

Electron-Paramagnetic-Res study of LiKSO4 in phase IV below -138 degrees C

A detailed single-crystal EPR study of phase IV of lithium potassium sulphate below -138 degrees C has been carried out using NH3+, which substitutes for K+, as the paramagnetic probe. The spin-Hamiltonian parameters have been evaluated at -140 degrees C and yield an isotropic g=2.0034; (AH)XX=(AH)YY=25.3 G and (AH)ZZ=23.8 G; (AN)XX=8.1 G, (AN)YY=21.2 G and (AN)ZZ=25.9 G. In this phase there are 12 magnetically inequivalent K+ sites and their occurrence is ascribed to the loss of a c glide.

Reply to Discussion on ``Bearing capacity of circular footings over rock mass by using axisymmetric quasi lower bound finite element limit analysis'' Comput. Geotech. 70 (2015) 138-149]

A discussion has been provided for the comments raised by the discusser (Clausen, 2015)1] on the article recently published by the authors (Chakraborty and Kumar, 2015). The effect of exponent alpha for values of GSI approximately smaller than 30 becomes more critical. On the other hand, for greater values of GSI, the results obtained by the authors earlier remain primarily independent of alpha and can be easily used. (C) 2015 Elsevier Ltd. All rights reserved.

Estatuto da juventude : Lei nº 12.852, de 5 de agosto de 2013, e legislação correlata

Apresenta a Lei 12.852 que institui o Estatuto da Juventude e dispõe sobre os direitos dos jovens, os princípios e diretrizes das políticas públicas de juventude e o Sistema Nacional de Juventude (Sinajuve).

Diário da Constituinte [gravação de vídeo] : [programa n. 138 A]

O Senador Mauro Benevides (PMDB-CE) assume a Presidência da Assembleia Nacional Constituinte (ANC) e preside a primeira sessão plenária do período de debates do novo anteprojeto. A Reforma Agrária terá dez artigos. A Deputada Raquel Capiberibe (PSB-AP) relata que o texto não reflete as aspirações do povo. O Deputado Vicente Bogo (PMDB-RS) relata que a reforma agrária atingirá o latifundiário e o pequeno proprietário. O Deputado Tadeu França (PMDB-PR) defende que as propriedades dos Estados do sul tenham, no máximo, mil hectares e, nas demais regiões, hum mil e quinhentos hectares. O Deputado Carlos Cardinal (PDT-RS) reivindica recursos para que hajam desapropriações rápidas. O Deputado Waldyr Pugliesi (PMDB-PR) esclarece que foram aprovados dispositivos que implicariam a derrogação de alguns artigos do Estatuto da Terra, uma lei criada no Governo Castello Branco, concluindo que a nova Constituição terá que avançar e jamais retroagir.

Diário da Constituinte [gravação de vídeo] : [programa n. 138]

As mulheres constituintes reivindicam maior participação no Programa Diário da Constituinte e levaram esse pedido ao 1º Secretário da Assembléia Nacional Constituinte - ANC , o Deputado Marcelo Cordeiro (PMDB-BA). A Deputada Abigail Feitosa (PSB-BA) defende mais verbas para as escolas públicas. A Deputada Beth Azize (PSB-AM) pede que o Deputado Ulysses Guimarães revogue a Lei de Segurança Nacional, enquanto estiver interinamente no cargo de Presidente da República. O Deputado Ulysses Guimarães acha que este assunto cabe a Assembléia Nacional Constituinte. O projeto aprovado na Comissão de Sistematização será discutido e poderá receber emendas. O Deputado Luiz Inácio Lula da Silva (PT-SP) sugere a alteração da pauta das discussões. O projeto também começará a receber as emendas populares. O Senador Afonso Arinos (PFL-RJ) relata que as emendas populares representam um processo de democracia semi-direta. O número de artigos da nova Carta pode ser um problema para alguns constituintes, mas não preocupa o Presidente da Comissão de Sistematização, o Senador Afonso Arinos. Na sessão O Povo Pergunta, uma cidadã gostaria de saber o que está sendo feito em benefício do menor abandonado. O Deputado Farabulini Júnior (PTB-SP) responde que é necessário retirar as crianças da rua e, para isso, apresentou emenda que obriga o governo a manter o semi-internato, para crianças de 7 a 14 anos.

Estatuto da juventude [gravação de som] : Lei nº 12.852, de 5 de agosto de 2013, e legislação correlata

Apresenta a Lei 12852 que institui o Estatuto da Juventude e dispõe sobre os direitos dos jovens, os princípios e diretrizes das políticas públicas de juventude e o Sistema Nacional de Juventude (Sinajuve), bem como a Lei 12845 de primeiro de agosto de 2012 e o Decreto 8074 de quatorze de agosto de 2013.

Comparative drift studies on streams in lower Austria (Flysch, gneiss and chalk formations) [Translation from: Schweizerische Zeitschrift fur Hydrobiologie 30 138-185, 1968.]

Seasonal changes and flooding have an extraordinarily great influence on the drift of organisms. The free water space plays the main part in the provision of food for some fish (Salmo trutta - trout): drift and content of the stomach are balanced here (Simuliidae): whereas others (Thymallus vulgaris) only selectively chose certain animals living at the bottom (molluscs). The total drift, drift of organisms and drift of organic material and minerals, plays a main role in the rate of production in streams. Besides the biology of the organisms living on the river bed, also the geological and hydrographical situation of the area plays a very important role for the composition of the drift. During the years 1964-1966 three streams in the characteristical geological formations flysch, gneiss and chalk of lower Austria were studied in regard to their drift. The Tulln (above St. Christopen), the Krems (above Senftenberg) and the Schwarza (above Hirschwang) seemed to be ideal for this comparative study because they are easy to reach. After summarising the hydrography and chemistry of examined rivers, the author examines the relationship between water level and total drift and the stratification of the total drift before analysing the drift of living organisms. Also considered are seasonal changes of drift of organisms and drift of exuviae.

Profile soundings in lakes of the younger morainal area of Sleswick-Holstein with a sediment-echo-sounder of 30 kHz [Translation from: Wass.Boden 26, 135-138, 1974]

To be able to carry out physical, chemical and biological investigations on a lake, one needs a thorough knowledge of the volume of water and the shape of the lake basin. Little is known about the about the morphology of the lakes in Schleswig-Holstein and its ecological consequences. For this research a 30 KHz echo sounder with sediment transceiver was used to carry out profile determinations (echo soundings). This apparatus continuously records on paper the different reflexions and absorptions of the sediment and water body in the corresponding depth. By this, acoustically noticeable layers and different densities in the sediment and 'scattering layers' in the water body due to physical, chemical and biological reasons (e.g. plans and single fish) are made visible. Result are summarised here regarding the echo soundings in Blunker See.

Anti-HIV Actions of 7- and 10-Substituted Camptothecins (vol 15, pg 138, 2010)

The authors thank the anonymous reviewer for helpful comments on the early version of the manuscript. This work was financially supported by the earmarked fund for Modern Agro-industry Technology Research System, the Science Fund for Young Scholars in Sichuan Province (Grant No: ZQ 026-017), and the National 863 Project of China (No. 2008AA101001).