Laser Hole Drilling of Stainless Steel 321H and Steel 33 Using 3D CO2 Laser CNC Machine

Furat I. Hussein; Ziad A. Taha; Thaier A. Tawfiq; Ahmed B. Jawad

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Publication Date

Thu Dec 15 2011

Journal Name

Iraqi Journal Of Laser

Volume

10

Issue Number

A

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Laser Hole Drilling of Stainless Steel 321H and Steel 33 Using 3D CO2 Laser CNC Machine

Furat I. Hussein

Ziad A. Taha

Thaier A. Tawfiq

Ahmed B. Jawad

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In present work an investigation for precise hole drilling via continuous wave (CW) CO2 laser at 150 W maximum output power and wavelength 10.6 μm was achieved with the assistance of computerized numerical controlled (CNC) machine and assist gases. The drilling process was done for thin sheets (0.1 – 0.3 mm) of two types of metals; stainless steel (sst) 321H, steel 33 (st). Changing light and process parameters such as laser power, exposure time and gas pressure was important for getting the optimum results. The obtained results were supported with computational results using the COMSOL 3.5a software code.

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Publication Date

Sun Nov 01 2020

Journal Name

Iop Conference Series: Materials Science And Engineering

Pump-Probe Technique to Study of the All-Optical Switching Properties of Copper Phthalocyanine Thin Film prepared via Pulsed laser deposition

Mohammed T.

Reem R.

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AbstractZ-scan has been utilized for studying the non-linear properties and optical limiting behaviors of the dye Copper Phthalocyanine thin films. The refractive index is negative, which indicates a self-defocusing behavior and non-linear absorption coefficient (<italic>β</italic>) of CuPc is a positive sign is a result of RSA. The optical switching behaviors of dye have been researched with the use of the method of the pump-probe with 9ns Q-Switched Nd: YAG laser at pump beam equal to 532 nm and a probe beam equal to 630nm Diode laser. The thin films of copper Phthalocyanine also reflect a significant limiting of the optical power of CW laser with an adequate threshold of the opt ... Show More

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(1)

Publication Date

Wed Mar 10 2021

Journal Name

Baghdad Science Journal

Antimicrobial Activity of Locally Synthesized Carbon Nanosphere on Some Pathogenic Species of Bacteria and Parasites

Antimicrobial Activity

Bacteria

Carbon Nanospheres

Cytotoxicity

Parasites.

Ali

Abdulqader

Shaimaa

Mohammad

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Antibacterial activity of CNSs against Staphylococcus aureus and Escherichia coli was estimated. Higher inhibition zone of 18 mm and 20 mm were observed against S. aureus and E.coli, respectively, at a concentration of 2 mg/ml of carbon nanosphere after 24 hrs of incubation at 37 ºC. In vitro cytotoxicity experiment was performed on two parasite strains of Leishmania donovani and Leishmania tropica by using MTT assay. L. donovani revealed more sensitiv to the CNSs than L. tropica. An intermediate level of cytotoxicity of 51.31 % was observed when 2.4 mg/ml of CNSs was incubated with L. donovani, while weak cytotoxicity of 37.20 % was shown when the

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(2)

Publication Date

Fri Jan 01 2021

Journal Name

Journal Of Economics And Administrative Sciences

Crisis management according to the strategic leadership - the interactive role of decision support systems. (An exploratory study at the Ministry of Industry and Minerals / the State Company for Steel Industries)

Strategic leadership

decision support systems

crisis management

senior management

interactive analysis

Sajid Nasser

Sheffaa Mohammed

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The researcher aims to Diagnose the reality of research variables, strategic leadership and decision support systems, and their impact on crisis management in the General Company for Steel Industries because of their important role in preventing crises and reducing their occurrence for the research company in particular and other companies in general affiliated with the Ministry of Industry and Minerals, as well as clarifying theoretical concepts of research variables As it included the answer to questions related to the research problem, including (Is there an impact of the strategic leadership in managing crises if decision support systems are used), and the researcher adopted the descriptive and analytical approach in its comp

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(1)

Publication Date

Sun Dec 01 2013

Journal Name

Diyala Journal Of Engineering Sciences

Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform

DS-CDMA

3-D Hadamard

2-D Spreading Codes

2-D CDMA

2-D ISI Channel

Ali

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Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for generating and transmitting (2-D CDMA) symbols through 2-D Inter-Symbol Interference (ISI) channel to increase the transmission speed. The 3D-Hadamard matrix is used to generate the 2-D spreading codes required to spread the two-dimensional data for each user row wise and column wise. The quadrature amplitude modulation (QAM) is used as a data mapping technique due to the increased spectral efficiency offered. The new structure simulated using MATLAB and a comparison of performance for ser

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Publication Date

Tue Jun 05 2018

Journal Name

The Cleft Palate-craniofacial Journal

Longitudinal 3D Assessment of Facial Asymmetry in Unilateral Cleft Lip and Palate

Dhelal

Xiangyang

Felicity V.

Ashraf

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(29)

(20)

Publication Date

Wed Dec 01 2021

Journal Name

Civil And Environmental Engineering

Developing A Mathematical Model for Planning Repetitive Construction Projects By Using Support Vector Machine Technique

Abbas M.

Kadhim Raheim

Wadhah Amer

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AbstractEach project management system aims to complete the project within its identified objectives: budget, time, and quality. It is achieving the project within the defined deadline that required careful scheduling, that be attained early. Due to the nature of unique repetitive construction projects, time contingency and project uncertainty are necessary for accurate scheduling. It should be integrated and flexible to accommodate the changes without adversely affecting the construction project’s total completion time. Repetitive planning and scheduling methods are more effective and essential. However, they need continuous development because of the evolution of execution methods, essent ... Show More

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Publication Date

Wed Nov 05 2025

Journal Name

Irrigation And Drainage

Predicting Potential Salinity in River Water for Irrigation Water Purposes Using Integrative Machine Learning Models

Ali Omran

Hind Kamil

Iman

Bijay

Ahmed M.

Vahdettin

Huseyin Cagan

Sani I.

Mou Leong

Atheer Y.

Zaher Mundher

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ABSTRACTAccurate prediction of river water quality parameters is essential for environmental protection and sustainable agricultural resource management. This study presents a novel framework for estimating potential salinity in river water in arid and semi‐arid regions by integrating a kernel extreme learning machine (KELM) with a boosted salp swarm algorithm based on differential evolution (KELM‐BSSADE). A dataset of 336 samples, including bicarbonate, calcium, pH, total dissolved solids and sodium adsorption ratio, was collected from the Idenak station in Iran and was used for the modelling. Results demonstrated that KELM‐BSSADE outperformed models such as deep random vector funct ... Show More

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(1)

Publication Date

Mon Jun 30 2008

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Biotreatment of Oil Wells Drilling Waste in an Agricultural Soil

oil wells

drilling waste

biotreatment

fungal

Muna

Ayad

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One of the most important environmental issues is the responsible effective and economic treatment of drilling waste especially oily waste.
In this research two fungal isolates named Pleurotus ostreatus and Trichoderma harzianum were chosen for the first time to treat biologically the oily drilled cuttings contaminated with diesel which resulted from drilling oil wells use oil based muds (OBMs).
The results showed that the fungi under study utilized the hydrocarbon of contaminated soil as a source of nutrient and growth and that both fungi can be considered hydrocarbon degrading microorganisms. The used biotreatment is cost effective process since most of the materials used in the cultivation and growth of the present fungi were av

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Publication Date

Sat May 23 2026

Journal Name

Journal Of Engineering

Application of Mathematical Drilling Model on Southern Iraqi Oil Fields

Ali

Sameera

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Publication Date

Mon Apr 24 2017

Journal Name

Spe Kingdom Of Saudi Arabia Annual Technical Symposium And Exhibition

Optimization of Infill Drilling in Whicher Range Field in Australia

machine learning

reservoir simulation

asset and portfolio management

cumulative production

transient drainage area

production rate

reservoir model

infill well

tight gas reservoir

Modeling & Simulation

Omar

Aswin R.

Md Mofazzal

Akim H.

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AbstractNow that most of the conventional reservoirs are being depleted at a rapid pace, the focus is on unconventional reservoirs like tight gas reservoirs. Due to the heterogeneous nature and low permeability of unconventional reservoirs, they require a huge number of wells to hit all the isolated hydrocarbon zones. Infill drilling is one of the most common and effective methods of increasing the recovery, by reducing the well spacing and increasing the sweep efficiency. However, the problem with drilling such a large number of wells is the determination of the optimum location for each well that ensures minimum interference between wells, and accelerates the recovery from the field. Detail ... Show More

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