The Effects of ? – Rays on The Optical  Constants of  ZnS Thin Films

Mustafa Shakir  Hashim; Sami Salman  Chiad; Nadir Fadhil Habubi

doi:10.21123/bsj.2010.7.3.1232-1236

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Publication Date

Sun Sep 05 2010

Journal Name

Baghdad Science Journal

Volume

7

Issue Number

3

DOI

10.21123/bsj.2010.7.3.1232-1236

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The Effects of ? – Rays on The Optical Constants of ZnS Thin Films

"thin film

flash evaporation

ZnS

optical properties"

Mustafa Shakir Hashim

Sami Salman Chiad

Nadir Fadhil Habubi

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ZnS thin films were grown onto glass substrates by flash evaporation technique, the effects of ? – rays on the optical constants of ZnS these films were studied. It was found that ? – rays affected all the parameters under investigation.

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Publication Date

Sun Aug 03 2025

Journal Name

Journal Of Engineering

Image Compression Using 3-D Two-Level Techniques

Image compression

3-D two level wavelet transform

3-D two level multi-wavelet transform

3-D two level hybrid technique

Image data properties.

Zainab

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In this paper three techniques for image compression are implemented. The proposed techniques consist of three dimension (3-D) two level discrete wavelet transform (DWT), 3-D two level discrete multi-wavelet transform (DMWT) and 3-D two level hybrid (wavelet-multiwavelet transform) technique. Daubechies and Haar are used in discrete wavelet transform and Critically Sampled preprocessing is used in discrete multi-wavelet transform. The aim is to maintain to increase the compression ratio (CR) with respect to increase the level of the transformation in case of 3-D transformation, so, the compression ratio is measured for each level. To get a good compression, the image data properties, were measured, such as, image entropy (He), percent root-

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