Results 111 to 120 of about 2,277,000 (297)

Map of San Luis Obispo Co. California.

open access: yes, 1910
Map shows early twentieth century San Luis Obispo County, California township grid, grants, roads, railroads, national forests, ranches, and telephone lines. Includes legend. Scale [1:253,440]
Progressive Map Service
core  

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

Enhanced Chaotic Pseudorandom Number Generation Using Multiple Bernoulli Maps with Field Programmable Gate Array Optimizations

open access: yesInformation
Certain methods for implementing chaotic maps can lead to dynamic degradation of the generated number sequences. To solve such a problem, we develop a method for generating pseudorandom number sequences based on multiple one-dimensional chaotic maps.
Leonardo Palacios-Luengas   +5 more
doaj   +1 more source

2D Chebyshev - Sine map for image encryption(基于2D Chebyshev-Sine 映射的图像加密算法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2019
混沌系统因对初始条件和参数具有极度的敏感性、遍历性和不可预测性,被广泛应用于图像加密领域。提出了一种二维映射——二维Chebyshev-Sine 映射。通过分析轨迹图得到映射,与其他混沌映射相比,此映射拥有更宽广的混沌范围和良好的遍历性,对初始条件和系统参数具有高度敏感性,实现成本相对较低。基于此,提出了一种线性混合层图像加密算法:通过行移位和列混合有效改变图像像素空间位置和像素频域中的值,同时使用了中国剩余定理的扩散原则。实验仿真结果证明,此加密算法具有抵抗差分攻击和选择明文攻击的性能,且运行速度快 ...
ZHONGYanru(钟艳如)   +4 more
doaj   +1 more source

The Dirichlet-to-Neumann map for the elliptic sine Gordon [PDF]

open access: yes, 2012
We analyse the Dirichlet problem for the elliptic sine Gordon equation in the upper half plane. We express the solution $q(x,y)$ in terms of a Riemann-Hilbert problem whose jump matrix is uniquely defined by a certain function $b(\la)$, $\la\in\R$, explicitly expressed in terms of the given Dirichlet data $g_0(x)=q(x,0)$ and the unknown Neumann ...
Fokas, A. S., Pelloni, Beatrice
openaire  

Prospect Green Map: a community map of environmental, historical, cultural, civic, and recreational sites

open access: yes
A map detailing the sites of interest and importance in the Prospect, NC, and the Robeson County area of North Carolina.
Robeson County Green Map Project
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Truk Islands : special strategic map

open access: yes, 1945
Scale 1:1,000,000 ; Lambert conformal conic projection. 1 map : color ; 46 x 68 cm. First edition-AMS 1. Prepared under the direction of the Chief of Engineers, U.S. Army ; compiled by the Army Map Service, February 1943. Standard map series designation:
United States. Army Map Service.
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Investigating transcription factor dynamics in health and disease using FRAP

open access: yesFEBS Letters, EarlyView.
FRAP analysis of GFP‐tagged transcription factors reveals how molecular mobility and target engagement change in response to drug treatment. By combining live‐cell imaging, quantitative model fitting, and statistical analysis, this approach uncovers transcription factor dynamics linked to disease mechanisms, providing a powerful framework for ...
Kannan Govindaraj   +3 more
wiley   +1 more source

Map of Andrews County, Texas.

open access: yes, 1925
Map shows land ownership, university and public school land, existing and proposed railroad lines in Andrews County, Texas during the early twentieth century. Includes note and listing of abstract companies in various Texas counties.
Logan Map Company
core  

The complex sine-Gordon model on a half line [PDF]

open access: yes, 2003
In this thesis, we study the complex sine-Gordon model on a half line. The model in the bulk is an integrable (l+1) dimensional field theory which is U(1) gauge invariant and comprises a generalisation of the sine-Gordon theory.
Tzamtzis, Georgios
core  

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