THE SPREAD OF FARMING ECONOMY IN THE WESTERN MEDITERRANEAN: A SHORT REPLY TO AMMERMAN (2021)

ABSTRACTManen et al. provide here a reply to the critical comment published by A. J. Ammerman regarding their article “The Neolithic Transition in the Western Mediterranean: a complex and non-linear diffusion process—the radiocarbon record revisited,” published in 2019 in Radiocarbon. They also use this occasion to reaffirm the need to elaborate novel interpretive frameworks that combine both geo-chronological and cultural data.

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The Neolithic Transition in the Western Mediterranean: a Complex and Non-Linear Diffusion Process—The Radiocarbon Record Revisited

Radiocarbon ◽

10.1017/rdc.2018.98 ◽

2018 ◽

Vol 61 (2) ◽

pp. 531-571 ◽

Cited By ~ 10

Author(s):

C Manen ◽

T Perrin ◽

J Guilaine ◽

L Bouby ◽

S Bréhard ◽

...

Keyword(s):

Diffusion Process ◽

High Precision ◽

Western Mediterranean ◽

Economic Traits ◽

Linear Diffusion ◽

Neolithic Transition ◽

Statistical Framework ◽

Non Linear ◽

Dissemination Process

ABSTRACTThe Neolithic transition is a particularly favorable field of research for the study of the emergence and evolution of cultures and cultural phenomena. In this framework, high-precision chronologies are essential for decrypting the rhythms of emergence of new techno-economic traits. As part of a project exploring the conditions underlying the emergence and dynamics of the development of the first agro-pastoral societies in the Western Mediterranean, this paper proposes a new chronological modeling. Based on 45 new radiocarbon (14C) dates and on a Bayesian statistical framework, this work examines the rhythms and dispersal paths of the Neolithic economy both on coastal and continental areas. These new data highlight a complex and far less unidirectional dissemination process than that envisaged so far.

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The Comparison of Isotropic and Anisotropic Diffusion Techniques for Image Denoising

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.34-35.557 ◽

2010 ◽

Vol 34-35 ◽

pp. 557-561

Author(s):

Cui Yin Liu ◽

Chun Yu Zhang ◽

Hong Zhao Yuan ◽

Xi Long Qu

Keyword(s):

Diffusion Process ◽

Nonlinear Diffusion ◽

Anisotropic Diffusion ◽

Diffusion Processes ◽

Local Information ◽

Linear Diffusion ◽

Anisotropic Conductivity ◽

Method Noise ◽

Non Linear ◽

The Difference

The non-linear diffusion techniques were proposed for overcome the linear diffusion defaults. The linear diffusion was a homogeneous diffusivity with a constant conductivity. In this diffusion process, the noise and the edges were smoothed in the image. In order to prevent the edge from being smoothed during the denoising, the nonlinear diffusion was proposed by Pereona and Malik. In this method, noise was smoothed Simultaneously with the edges blurred. In diffusion processes, the conductivity is dependent on the image local information. We analyzed the ineffectiveness of isotropic and extended the work into the tensor-based anisotropic diffusion. It would be desirable to rotate the flux towards the orientation of interesting features. We compare the difference of isotroic linear and non-linear anisotropic diffusivity, and considere how to design non-linear anisotropic conductivity based on the different requires of the image filtering.

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