نتایج جستجو برای: sieve analysis

تعداد نتایج: 2827783  

Journal: :Plant physiology 1975
D B Fisher

Soybean (Glycine max cv. Bragg) petiolar tissue containing translocated (14)C-sucrose was quick frozen, freeze-substituted in acetone or propylene oxide and embedded in Epon. This procedure allowed cytological observations on sieve elements whose functional condition could be verified by microautoradiography. Sieve elements and companion cells were essentially free of ice damage. Aside from a P...

Journal: :The Plant cell 2008
Elisabeth Truernit Hélène Bauby Bertrand Dubreucq Olivier Grandjean John Runions Julien Barthélémy Jean-Christophe Palauqui

Currently, examination of the cellular structure of plant organs and the gene expression therein largely relies on the production of tissue sections. Here, we present a staining technique that can be used to image entire plant organs using confocal laser scanning microscopy. This technique produces high-resolution images that allow three-dimensional reconstruction of the cellular organization o...

2011
Vaibhav Choudhary Kishore Kumar Pravin Kumar

Visual cryptography encodes a secret image into n shares which are distributed to n participants. Pixel Sieve method was proposed recently to encode an image into shares, but the encryption quality is poor. In this paper an improved version of pixel sieve method is proposed to achieve more security then existing pixel sieve method. Based on cross merge and key shifting schemes, the proposed met...

1997
Philip L. Isenhour James “Bo” Begole Winfield S. Heagy Clifford A. Shaffer

We describe Sieve, a prototype Java-based collaborative environment for constructing visualizations interactively. Sieve allows collaborative construction of data-flow networks from an extensible set of modules. Modules may read data from a variety of sources, filter and transform the data in various ways, and generate visualizations. Annotation tools are also provided for mark-up and documenta...

2013
Antoine Joux Cécile Pierrot

In this paper, we study the discrete logarithm problem in finite fields related to pairing-based curves. We start with a precise analysis of the state-of-the-art algorithms for computing discrete logarithms that are suitable for finite fields related to pairing-friendly constructions. To improve upon these algorithms, we extend the Special Number Field Sieve to compute discrete logarithms in Fp...

Journal: :IEEE Trans. Computers 1992
Peter R. Cappello Willard L. Miranker

A principal limitation in accuracy for scientific computation performed with floatingpoint arithmetic may be traced to the computation of repeated sums, such as those which arise in inner products. As previously reported, a systolic super summer is a cellular piece of hardware for the summation of floating-point numbers. The apparatus receives floating-point summands, converting them into a fix...

Journal: :Plant physiology 1986
D B Fisher P K Macnicol

The amino acid composition of endosperm cavity sap and of sieve tube saps from the flag leaf, peduncle, rachis, grain pedicel, and grain were determined for wheat plants just past the mid-half of grain filling. On a mole percent basis, glutamine accounted for almost half of the amino acids in sieve tube sap from the peduncle and ear. Other protein amino acids, plug gamma-aminobutyrate, were pre...

2009
Adrian N. Evans

4 Colour connected filters 11 4.1 Colour area morphology scale-spaces . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1.1 Colour Extrema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1.2 Distance metrics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2 Convex Colour Sieve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3 Vecto...

2014
Sarah Sterrett Gerald H. Learn Paul T. Edlefsen Barton F. Haynes Beatrice H. Hahn George M. Shaw Katharine J. Bar

BACKGROUND We performed human immunodeficiency virus type 1 (HIV-1) transmitted/founder (T/F) virus analysis of the VAX003 vaccine efficacy trial participants to characterize the transmission bottleneck and test for vaccine-associated reduction or enhancement of infection in this injection drug user (IDU) cohort. METHODS We performed single genome sequencing of plasma vRNA from 50 subjects sa...

2005
Stephan Baier Jeffery Hall

We prove an estimate for the large sieve with square moduli which improves a recent result of L. Zhao. Our method uses an idea of D. Wolke and some results from Fourier analysis. Mathematics Subject Classification (2000): 11N35, 11L07, 11B57

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