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Publication Date

Thu Apr 28 2022

Journal Name

Iraqi Journal Of Science

Volume

57

Issue Number

3B

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Effect of Gamma irradiation on The Optical properties of (PVA: CuCl2) films

PVA

CuCl2

irradiation

band gap

urbach energy

Seham Hassan

Esraa Akram

Enas Yasseen

Shaimaa Akram

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The study effect irradiation on optical properties of film (PVA: CuCL2) prepared by casting method, with thickness of (30±1) μm. And used Cs137 to obtained Gamma ray with energy (662)keV and time irradiation(5,6 and 7) weeks and affectivity (4.3) ci. The spectra absorbance and transmittance register in range (300-1100) nm .
Results show that the optical band gap for (PVA: CuCl2) decreasing after irradiation with gamma ray from (3.2,3.1,3 and 2.7)eV, urbach energy values increase with the increasing time radiation. And the absorption constants (α,k,n,) and the optical conductivity are changing after irradiated with gamma ray .

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Publication Date

Sun Dec 09 2018

Journal Name

Baghdad Science Journal

Optimal UAV Deployment for Data Collection in Deadline-based IoT Applications

Data Collection

Deadline Time

Energy Efficiency

Internet of things

Mixed Integer Linear Programming

Unmanned Aerial Vehicles.

Alaa Taima

Seyed Amin Hosseini

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The deployment of UAVs is one of the key challenges in UAV-based communications while using UAVs for IoT applications. In this article, a new scheme for energy efficient data collection with a deadline time for the Internet of things (IoT) using the Unmanned Aerial Vehicles (UAV) is presented. We provided a new data collection method, which was set to collect IoT node data by providing an efficient deployment and mobility of multiple UAV, used to collect data from ground internet of things devices in a given deadline time. In the proposed method, data collection was done with minimum energy consumption of IoTs as well as UAVs. In order to find an optimal solution to this problem, we will first provide a mixed integer linear programming m

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Publication Date

Tue May 01 2018

Journal Name

Journal Of Engineering Science And Technology

A proposed dual size design for energy minimization in sub-threshold circuits

Dual size design

Slack based GA

Static timing analysis

Sub-threshold CMOS circuits

Ultra low energy

Ali T.

SALEEM M.

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Sub-threshold operation has received a lot of attention in limited performance applications.However, energy optimization of sub-threshold circuits should be performed with the concern of the performance limitation of such circuit. In this paper, a dual size design is proposed for energy minimization of sub-threshold CMOS circuits. The optimal downsizing factor is determined and assigned for some gates on the off-critical paths to minimize the energy at the maximum allowable performance. This assignment is performed using the proposed slack based genetic algorithm which is a heuristic-mixed evolutionary algorithm. Some gates are heuristically assigned to the original and the downsized design based on their slack time determined by static tim

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Publication Date

Mon Apr 24 2017

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Improved ð‘«âˆ’ð‘¯ð’† ðŸ‘ Fusion Reaction Characteristics Parameters

ð·âˆ’ð»ð‘’ 3 ð‘Ÿð‘’ð‘Žð‘ð‘¡ð‘–ð‘œð‘›

proton energy

reactivity

reaction rate

fusion cross section

hot plasma

Ali K.

Raad H.

Mustafa K.

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The most likely fusion reaction to be practical is Deuterium and Helium-3 (ð·âˆ’ð»ð‘’
3 ), which is highly desirable because both Helium -3 and Deuterium are stable and the reaction produces a 14 ð‘€ð‘’ð‘‰ proton instead of a neutron and the proton can be shielded by magnetic fields. The strongly dependency of the basically hot plasma parameters such as reactivity, reaction rate, and energy for the emitted protons, upon the total cross section, make the problems for choosing the desirable formula for the cross section, the main goal for our present work.

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Publication Date

Sun Sep 26 2021

Journal Name

Journal Of The Faculty Of Medicine Baghdad

Web Query Behaviour Concerning HEV (Blue) Light in Ophthalmology

Blue light

digital epidemiology

frequentists statistics

high-energy visible light

machine learning

macular degeneration

photochemically-induced retinal injury

retinal detachment

retinal perforation

retinal tear

Ahmed

Hend Jaddoa

Luay Mahmoud

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Background: High-energy visible (HEV) possesses high-frequency in the violet-blue band of the visible light spectrum. Blue light has relevance to ophthalmology via photochemically-induced retinal injury.

Objectives: To explore the spatial-temporal mapping of online search behavior concerning HEV light.

Materials and Methods: We retrieved raw data of web search volume, via Microsoft Google Trends, using five search topics; "Biological effects of HEV light", "Vision impairment", "Macular degeneration", "Retinal tear", and "Retinal detachment", for the period 2004-2020.

Results: Web users, mainly from Far-East Asia and Australasia, were most interest

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