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Publication Date

Sat Jun 30 2012

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Volume

13

Issue Number

2

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Thickening Time and Compressive Strength Correlations for Bentonitic- Class "G" Cement Slurries

Correlations

Thickening time

Compressive strength

Drilling

Cementing materials.

Riyadh

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Empirical equations for estimating thickening time and compressive strength of bentonitic - class "G" cement slurries were derived as a function of water to cement ratio and apparent viscosity (for any ratios). How the presence of such an equations easily extract the thickening time and compressive strength values of the oil field saves time without reference to the untreated control laboratory tests such as pressurized consistometer for thickening time test and Hydraulic Cement Mortars including water bath ( 24 hours ) for compressive strength test those may have more than one day.

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Publication Date

Mon Jul 20 2020

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Applying Shrinkage Estimation Technique of P(Y<Max X1, X2,â€¦, Xk) in Case of Generalized Exponential Distribution

Generalized Exponential Distribution (GED)

Stressâ€“Strength (S-S) models

Maximum likelihood estimator (MLE)

Shrinkage estimator (Sh) and mean squares error (MSE).

Adel Abdulkadhim

Mohammad Khairallah

Abbas Najim

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This paper concerned with estimation reliability (Â for K components parallel system of the stress-strength model with non-identical components which is subjected to a common stress, when the stress and strength follow the Generalized Exponential Distribution (GED) with unknown shape parameter Î± and the known scale parameter Î¸ (Î¸=1) to be common. Different shrinkage estimation methods will be considered to estimate Â depending on maximum likelihood estimator and prior estimates based on simulation using mean squared error (MSE) criteria. The study approved that the shrinkage estimation using shrinkage weight function was the best.

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(2)

Publication Date

Thu Mar 28 2024

Journal Name

Journal Of Physical Education

The use of an innovative device to improve the efficiency of the posterior quadriceps muscle of the man after the anterior cruciate ligament injury of advanced soccer players

cruciate ligament

cruciate ligament tear

range of motion of the knee joint

athletic rehabilitation

thigh muscle circumference

static balance

thigh muscle strength

Mohameed

Abdulrahman

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Objective of the research This study aimed to manufacture an innovative device that enables the player to walk after the operation and improves functional efficiency through improvement in the range of motion as well as improvement in the size of the muscles working on the knee joint Imposing research There are statistically significant differences between the pre and posttests of the experimental and control groups, there are Statistically significant differences between the post-tests between the experimental group and the control group in favor of the experimental group of the research sample. The researchers used the experimental approach by designing the control and experimental groups with a test (pre-post) for the suitabili

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(2)

Publication Date

Wed Dec 01 2021

Journal Name

Journal Of Economics And Administrative Sciences

Mathematical Modelling of Gene Regulatory Networks

Ordinary Differential Equations (ODEs)

Gene-Regulation Networks (GRNs)

Runge-Kutta method (RK)

Time-Discretization

Central Dogma of Biology

Gene-expression

Transcription

Translation

Ruaa Rifaat

Lamyaa Mohammed Ali

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This research includes the use of an artificial intelligence algorithm, which is one of the algorithms of biological systems which is the algorithm of genetic regulatory networks (GRNs), which is a dynamic system for a group of variables representing space within time. To construct this biological system, we use (ODEs) and to analyze the stationarity of the model we use Euler's method. And through the factors that affect the process of gene expression in terms of inhibition and activation of the transcription process on DNA, we will use TF transcription factors. The current research aims to use the latest methods of the artificial intelligence algorithm. To apply Gene Regulation Networks (GRNs), we used a progr

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Publication Date

Sun Dec 06 2015

Journal Name

Baghdad Science Journal

New Operational Matrices of Seventh Degree Orthonormal Bernstein Polynomials

The Bernstein Basis and Bezier Curves

Gram-Schmidt Orthonormalization Process

Numerical Solution of Optimal Control of Time-varying Singular via Operational Matrices

Mayada N. Mohammed

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Based on analyzing the properties of Bernstein polynomials, the extended orthonormal Bernstein polynomials, defined on the interval [0, 1] for n=7 is achieved. Another method for computing operational matrices of derivative and integration D_b and R_(n+1)^B respectively is presented. Also the result of the proposed method is compared with true answers to show the convergence and advantages of the new method.

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Publication Date

Fri Dec 01 2017

Journal Name

Journal Of Economics And Administrative Sciences

Inventory control by using Fuzzy set theory An Applied Research at the Baghdad Soft Drinks Company

: Fuzzy Time Series

Fuzzy Inference System

The rules of condition and result (If-Then Rules)

Fuzzy Set Theory

Production Model Without Shortage

Purchase Model Without Shortage

وقاص سعد

عبد الله باسم

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The production companies in the Iraqi industry environment facing many of the problems related to the management of inventory and control In particular in determining the quantities inventory that should be hold it. Because these companies adoption on personal experience and some simple mathematical methods which lead to the identification of inappropriate quantities of inventory.

This research aims to identify the economic quantity of production and purchase for the Pepsi can 330ml and essential components in Baghdad soft drinks Company in an environment dominated by cases of non ensure and High fluctuating as a result of fluctuating demand volumes and costs ass

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Publication Date

Tue Dec 31 2019

Journal Name

Journal Of Economics And Administrative Sciences

The Reflection of the application TD-ABC approach on profits persistence Applied study in the General State of Hydraulic Industries Factory of Plastic*

Time-Driven Activity-Based Costing Approach

profits persistence traditional Approach of allocating manufacturing factory overhead.

مدخل محاسبة الكلفة على اساس النشاط الموجه بالوقت

ديمومة الارباح

المدخل التقليدي لتخصيص التكاليف الصناعية غير المباشرة

Sabiha Barzan

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The interest of many companies has become dealing with the tools and methods that reduce the costs as one of the most important factors of successful companies, and became the subject of the attention of many economic units because of the impact on the profits of company, and since the nineties of the last century the researchers and writers gave great attention to this subject, especially in light of the large competition and rapid developments in cost management techniques, as well as the wide and significant change in production methods that have been directed towards achieving customer satisfaction, all this and more driven by economic units in all sectors whether it is service or productivity to find methods that would reduc

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Publication Date

Sun Sep 04 2011

Journal Name

Baghdad Science Journal

Pulse Profile Rule in Laser Heating of Opaque Targets in Air

A theoretical model is developed to determine time evolution of temperature at the surface of an opaque target placed in air for cases characterized by the formation of laser supported absorption waves (LSAW) plasmas. The model takes into account the power temporal variation throughout an incident laser pulse

(i.e. pulse shape

or simply: pulse profile). Three proposed profiles are employed and results are compared with the square pulse approximation of a constant power.

Bassam H.

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A theoretical model is developed to determine time evolution of temperature at the surface of an opaque target placed in air for cases characterized by the formation of laser supported absorption waves (LSAW) plasmas. The model takes into account the power temporal variation throughout an incident laser pulse, (i.e. pulse shape, or simply: pulse profile).
Three proposed profiles are employed and results are compared with the square pulse approximation of a constant power.

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Publication Date

Mon Nov 01 2010

Journal Name

Al-nahrain Journal Of Science

Chemical Elements Diffusion in the Solar Interior

The standard solar model and equation of state have been used to study relative diffusion of Hydrogen and Helium in the present time for solar interior

as a function of distance and depth from the center of the star. The effects of temperature and density on diffusion velocity for these chemical elements have been explaned. It is found that heat flow which is arising from these reactions leads to an increase in helium diffusion velocity

while the temperature and density leading to a decrease in Hydrogen diffusion velocity. This means that Hydrogen behaves inversely with that for helium does through these reactions. Accordingly

diffusion percentages for Hydrogen

Helium and other Heavy Elements could be determined for the main sequence stars and white dwarf stars.

H.

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Publication Date

Sat Oct 01 2016

Journal Name

Journal Of Theoretical And Applied Information Technology

Factors affecting global virtual teams’ performance in software projects

Today the trend is to perform software development work via distributed geographical area among team

individual or even as an organization. However

due to the global market and international presence of many companies

there is a need to implement a global virtual teams. The global virtual team members are gradually engaged in globalized business environments across space

time and organizational boundaries via information and communication technologies. A global virtual team relies on communication

collaboration

and information exchange are the most important criteria in global virtual teams’ operations. The purpose of this paper is to answer two research questions. The first research question is to identify the factors affecting global virtual teams’ performance. A systematic literature review was conducted to answer the first research question. The second research question is on what the rank of the factor affecting the global virtual teams’ performance according to their level of effect on global virtual teams’ performance. Online survey was conducted within 103 developers and IT managers from eight IT companies to answer the second research question. The Statistical Package for Social Science (SPSS 22) was used to analyze the collected data. In this study

we investigated factors that affect global virtual teams’ performance

factors considered include cultural differences

language problems

time-zone differences

team size

technical problems

lack of trust

lack of sufficient training

and ICT problems. Also the findings indicated that lack of sufficient training is the highest level of effect on global virtual teams’ performance. On the other hand

Ali Yahya Gheni

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