doi:10.21123/bsj.2020.17.1(Suppl.).0371

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Publication Date

Wed Mar 18 2020

Journal Name

Baghdad Science Journal

Volume

17

Issue Number

1(Suppl.)

DOI

10.21123/bsj.2020.17.1(Suppl.).0371

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On Light Mapping and Certain Concepts by Using m_X N-Open Sets

m_X N-disconnected space

m_X N-Hausdorff space

mN-light function

m_X N-open set

mN-totally disconnected function

haider jebur

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The aim of this paper is to present a weak form of -light functions by using -open set which is -light function, and to offer new concepts of disconnected spaces and totally disconnected spaces. The relation between them have been studied. Also, a new form of -totally disconnected and inversely -totally disconnected function have been defined, some examples and facts was submitted.

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Publication Date

Sun Jun 03 2018

Journal Name

University Of Baghdad, College Of Education For Pure Sciences / Ibn Al-haitham, Department Of Mathematics

Some Types of Fibrewise Soft Topological Spaces

fibrewise soft near closed topological spaces

fibrewise soft near open topological spaces

fibrewise soft near compact spaces

fibrewise locally soft near compact spaces.

MOHAMMED ABDUL HUSSEIN

Y. Y.

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In this thesis, we introduced some types of fibrewise topological spaces by using a near soft set, various related results also some fibrewise near separation axiom concepts and a fibrewise soft ideal topological spaces. We introduced preliminary concepts of topological spaces, fibrewise topology, soft set theory and soft ideal theory. We explain and discuss new notion of fibrewise topological spaces, namely fibrewise soft near topological spaces, Also, we show the notions of fibrewise soft near closed topological spaces, fibrewise soft near open topological spaces, fibrewise soft near compact spaces and fibrewise locally soft near compact spaces. On the other hand, we studied fibrewise soft near forms of the more essent

Publication Date

Sat Oct 01 2016

Journal Name

Journal Of Economics And Administrative Sciences

Bayesian Estimator for the Scale Parameter of the Normal Distribution Under Different Prior Distributions

خصائص التوزيع الطبيعي

طريقة الإمكان الأعظم

طريقة العزوم

طريقة بيز

التوزيع الأولي SRIG

التوزيع الأولي non-informative

التوزيع الأولي لعائلة الدالة المرافقة الطبيعية

متوسط مربع الأخطاء (MSE)

متوسط الخطأ النسبي المطلق (MAPE).

The properties of the normal distribution

Maximum likelihood method

Moment estimation method

Bayes method

the SRIG prior distribution

the non-informative prior distribution

the natural conjugate family of priors

Mean Square Error (MSE)

Mean Absolute Percentage Error (MAPE).

جنان عباس

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In this study, we used Bayesian method to estimate scale parameter for the normal distribution. By considering three different prior distributions such as the square root inverted gamma (SRIG) distribution and the non-informative prior distribution and the natural conjugate family of priors. The Bayesian estimation based on squared error loss function, and compared it with the classical estimation methods to estimate the scale parameter for the normal distribution, such as the maximum likelihood estimation and th

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Publication Date

Thu Dec 30 2021

Journal Name

Iraqi Journal Of Science

Gompertz Fréchet stress-strength Reliability Estimation

Reliability

Stress- Strength

Gompertz Fréchet Distribution

Maximum Likelihood Estimator

Least square Estimator

Weighted Least square Estimator

Regression Estimator

Ranked set sampling estimator

Sarah A.

Nada S.

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In this paper, the reliability of the stress-strength model is derived for probability P(Y<X) of a component having its strength X exposed to one independent stress Y, when X and Y are following Gompertz Fréchet distribution with unknown shape parameters and known parameters . Different methods were used to estimate reliability R and Gompertz Fréchet distribution parameters, which are maximum likelihood, least square, weighted least square, regression, and ranked set sampling. Also, a comparison of these estimators was made by a simulation study based on mean square error (MSE) criteria. The comparison confirms that the performance of the maximum likelihood estimator is better than that of the other estimators.

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Publication Date

Sun Jan 01 2023

Journal Name

International Conference Of Computational Methods In Sciences And Engineering Iccmse 2021

Fibrewise slightly topological spaces

fibrewise slightly closed topological spaces

fibrewise slightly open topological spaces

fibrewise slightly locally sliceable and fibrewise locally slightly sectionable topological spaces.

Mohammed G.

Y. Y.

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Publication Date

Sun Feb 02 2020

Journal Name

University Of Baghdad, College Of Education For Pure Sciences / Ibn Al-haitham, Department Of Mathematics

Some Types of Perfect Mappings

j-perfect mappings

j-ω-perfect mappings

-ω-perfect mappings

weakly -ω-perfect mappings

strongly-ω-perfect mappings

nm- j-ω-converges to a subset

nm- j-ω-directed toward a set

nm- j-ω-closed mappings

nm- j-ω-rigid set

nm- j-ω-continuous mappings

nm- j-ω-perfect mappings in bitopological.

GHIDAA SADOON

Y. Y.

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The aims of this thesis are to study the topological space; we introduce a new kind of perfect mappings, namely j-perfect mappings and j-ω-perfect mappings. Furthermore, we devoted to study the relationship between j-perfect mappings and j-ω-perfect mappings. Finally, certain theorems and characterization concerning these concepts are studied. On the other hand, we studied weakly/ strongly forms of ω-perfect mappings, namely -ω-perfect mappings, weakly -ω-perfect mappings and strongly-ω-perfect mappings; also, we investigate their fundamental properties. We devoted to study the relationship between weakly -ω-perfect mappings and strongly -ω-perfect mappings. As well as, some new generalizations of some definitions wh

Publication Date

Wed Apr 25 2018

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Different Estimation Methods for System Reliability Multi-Components model: Exponentiated Weibull Distribution

Exponentiated Weibull Distribution (EWD)

Reliability of multi-component Stress â€“ Strength models R(s

k)

Maximum likelihood estimator (MLE)

Moment estimator (MOM)

shrinkage method (Sh)

Least Squares Estimator (LS)

Rank Set Sampling (RSS). and mean squared error (MSE).

Abbas Najim

Fatima Hadi

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In this paper, estimation of system reliability of the multi-components in stress-strength model R_(s,k) is considered, when the stress and strength are independent random variables and follows the Exponentiated Weibull Distribution (EWD) with known first shape parameter Î¸ and, the second shape parameter Î± is unknown using different estimation methods. Comparisons among the proposed estimators through Monte Carlo simulation technique were made depend on mean squared error (MSE) criteria

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Publication Date

Sun Oct 01 2023

Journal Name

مجلة دراسات دولية

الذكاء الاصطناعي والوجود الإنساني: قراءة فكرية في الابعاد الاجتماعية

تُعد فكرة الذكاء الاصطناعي من العلوم الحديثة

التي ارتبطت بالإنسان في العقود الخمسة الأخيرة

وأصبحت السياسة الرقمية جزءاً لا يتجزأ من المجتمع

لكونها تُستخدم في أغلب مجالات حياة الانسان. وهذا ما شجع صانعوا السياسات التكنولوجية الجديدة

في التفكير بكيفية توظيفه لخدمة مصالحهم العليا

بغض النظر عن بذل الجهود للتفكير في تنظيمه

ووضع قيود تراعي التشريعات الدينية

والقوانين

ودساتير الدول

والتقاليد والأعراف الاجتماعية. وبدأت بعض برامج الذكاء الاصطناعي تُستخدم كمنصة لمحتوى غير قانوني

وتخترق سلباً خصوصية الانسان

دون أن تحرص وتفكر الشركات في خطوات لمنع إساءة استخدام منصاتها.

ليث عصام مجيد

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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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