Details

Publication Date

Sun Jan 01 2012

Journal Name

International Journal Of Contemporary Mathematical Sciences

Volume

7

Issue Number

17

Choose Citation Style

Statistics

Pre-Topology Generated by the Short Path Problems

: Graph theory

Short path problem

Closure operators

j-pre-topology

j = 1

2

j-dependency

j = 1

2.

Restriction

Separators

Rate of liaison.

M.

Y. Y.

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Let G be a graph, each edge e of which is given a weight w(e). The shortest path problem is a path of minimum weight connecting two specified vertices a and b, and from it we have a pre-topology. Furthermore, we study the restriction and separators in pre-topology generated by the shortest path problems. Finally, we study the rate of liaison in pre-topology between two subgraphs. It is formally shown that the new distance measure is a metric

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Publication Date

Fri Mar 01 2019

Journal Name

Applied Acoustics

Theoretical model of absorption coefficient of an inhomogeneous MPP absorber with multi-cavity depths

Micro-perforated panel (MPP) absorber has been known as an alternative absorber to classical porous material given its facile installation

long durability

environmental friendliness and attractive appearance. Extensive studies of MPP absorber proposing the improvement of its absorption frequency bandwidth have been published. This study presents a MPP absorber introduced with inhomogeneous perforations and with multi-cavity depths. The MPP is divided into two sub-area

where each area has different hole diameter

perforation ratio and a separated backed cavity depth. The acoustic impedance is modelled using electrical equivalent circuit and the absorption coefficient is calculated under normal-incidence of sound. It is found that the inhomogeneous MPP can have good bandwidth of absorption by designing the sub-MPP of smaller perforation ratio with large hole diameter and the one having the larger perforation ratio with smaller hole diameter. The absorption bandwidth can be conveniently controlled by adjusting the cavity depth of each sub-MPP. The results from the experimental work show good agreement with the theoretical model.

Ali Ibrahim

Azma

Roszaidi

Iwan

Al-Ameri

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(72)

(62)

Publication Date

Sun Jan 20 2019

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

On Shrinkage Estimation for R(s, k) in Case of Exponentiated Pareto Distribution

: Exponentiated Pareto Distribution (EPD)

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

k)

Maximum likelihood estimator (MLE)

Shrinkage estimator and mean squared error (MSE).

Eman Ahmed

Abbas Najim

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This paper concerns with deriving and estimating the reliability of the multicomponent system in stress-strength model R_(s,k), when the stress and strength are identical independent distribution (iid), follows two parameters Exponentiated Pareto Distribution(EPD) with the unknown shape and known scale parameters. Shrinkage estimation method including Maximum likelihood estimator (MLE), has been considered. Comparisons among the proposed estimators were made depending on simulation based on mean squared error (MSE) criteria.

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(4)

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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(22)

Publication Date

Sun Jun 01 2014

Journal Name

Journal Of Economics And Administrative Sciences

Different Methods for Estimating Location Parameter & Scale Parameter for Extreme Value Distribution

Extreme Value Distribution

Maximum likelihood estimator

Method of moment Estimators

Estimators based on Percentiles

Least Squares estimators

Weighted Least Squares estimators

Ridge regression estimators

Adjusted Ridge regression estimators.

جنان عباس

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In this study, different methods were used for estimating location parameter and scale parameter for extreme value distribution, such as maximum likelihood estimation (MLE) , method of moment estimation (ME),and approximation estimators based on percentiles which is called white method in estimation, as the extreme value distribution is one of exponential distributions. Least squares estimation (OLS) was used, weighted least squares estimation (WLS), ridge regression estimation (Rig), and adjusted ridge regression estimation (ARig) were used. Two parameters for expected value to the percentile as estimation for distribution f

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Publication Date

Sun Dec 31 2023

Journal Name

Revue Académique De La Recherche Juridique

المسؤولية الجزائية لمزودي خدمة الإنترنت عن جريمة التنمر الإلكتروني.

التنمر الإلكتروني

صور التنمر الالكتروني

مزود خدمة الإنترنت.

Cyberbullying

Forms of cyberbullying

Internet service provider (ISP).

cyberintimidation

formes de cyberintimidation

fournisseur d&#039

acc&egrave

s &agrave

Internet (FAI).

النجار,

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يُعد التنمر ظاهرة إجتماعية قديمة موجودة في جميع المجتمعات سواء أكان المجتمع صناعيًا أم ناميًا، كما يُعد من المفاهيم الحديثة نسبيًا، وربما يرجع لحداثة الإعتراف به نوعًا من أنواع العنف فضلاعن ندرة الدراسات التي تناولته وعدم وجود معيار محدد لتحديد السلوك الذي يعد تنمرًا أم عابرًا، لقد بدأ الأهتمام بدراسة التنمر في سبعينات القرن الماضي وأصبح موضعًا يحضى بأهتمام العديد في مختلف البلدان، وفي عصرنا الحالي تطورت

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Publication Date

Tue Jan 01 2019

Journal Name

Преподаватель ХХi век

Фонограмматическая когниция в русском и арабском языках: основы флективного когнитивного строя

ФОНОГРАММАТИЧЕСКАЯ КОГНИЦИЯ

ФЛЕКТИВНЫЙ КОГНИТИВНЫЙ СТРОЙ

МАРКЕР

ФОНЕТИЧЕСКИЕ ИЗМЕНЕНИЯ

ЗВУКОВОЕ КОЛИЧЕСТВО КОРНЯ

РУССКИЙ ЯЗЫК

АРАБСКИЙ ЯЗЫК

PHONO-GRAMMATICAL COGNITION

INFLECTED COGNITIVE SYSTEM

PHONETIC CHANGES

SOUND QUANTITY OF ROOTS

RUSSIAN LANGUAGE

ARABIC

Raheem Ali

Zar

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В статье рассматривается вопрос о связи флективных изменений с мыслительными процессами на материале русского и арабского языков, анализируются семантические, фонетические, морфологические и синтаксические основы фонограмматической когниции. Цель статьи выявление прямой связи между количественным звуковым изменением согласного состава слова и мыслительными процессами, с помощью которых человеческ

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Publication Date

Sun Oct 22 2023

Journal Name

Iraqi Journal Of Science

Study of Matter Density Distributions, Elastic Electron Scattering form Factors and Reaction Cross Sections of 8He And 17B Exotic Nuclei

neutron-rich exotic nuclei

shell model calculations

elastic electron scattering form factor

density distributions

root mean square radii of halo nuclei PACS number(s)

21.10.Gv

25.30.Bf

21.10.ft

Adel

Gaith

Ahmed

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The ground state densities of unstable neutron-rich 8He and 17B exotic nuclei are studied via the framework of the two-frequency shell model (TFSM) and the binary cluster model (BCM). In TFSM, the single particle harmonic oscillator wave functions are used with two different oscillator size parameters βc and βv where the former is for the core (inner) orbits and the latter is for the valence (halo) orbits. In BCM, the internal densities of the clusters are described by single particle Gaussian wave functions. Shell model calculations for the two valence neutrons in 8He and 17B are performed via the computer code OXBASH. The long tail performance is clearly noticed in the calculated neutron and matter density distributions of these nucl

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Publication Date

Fri Apr 30 2021

Journal Name

Iraqi Journal Of Science

On Closed Quasi Principally Injective Acts over Monoids

Quasi Principally Injective Acts

Closed Quasi Principally Injective Acts

Closed Self Principally Injective Monoid

Continuous Acts

Extending Acts

Generalization of Quasi Principally injective acts

AMS Subject Classification: 20M30

20M99

08B30

Shaymaa Amer

Ahmed Amer

Yusra Amer

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The concept of closed quasi principally injective acts over monoids is introduced ,which signifies a generalization for the quasi principally injective as well as for the closed quasi injective acts. Characterization of this concept is intended to show the behavior of a closed quasi principally injective property. At the same time, some properties of closed quasi principally injective acts are examined in terms of their endomorphism monoid. Also, the characterization of a closed self-principally injective monoid is given in terms of its annihilator. The relationship between the following concepts is also studied; closed quasi principally injective acts over monoids, Hopfian, co Hopfian, and directly finite property. Ultimately, based on

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Publication Date

Thu Jun 01 2017

Journal Name

Journal Of The College Of Languages (jcl)

Das Mittelfeld im Deutschen und ihre Angabe im Arabischen Vorgelegt von

Schlusselwort: Das Mittelfeld im Deutschen und Arabischen – Deutsche Sprache – Grammatik – Analysierung der Felder des Satzes

Keywords: The midfield in German and Arabic - German language- Grammar -Analyze the fields of the sentence

Ruqaya Mahmood

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Die vorliegende Forschung handelt es um die Satzfelder, besonders das Mittelfeld des Satzes im deutschen und Arabischen. Diese Forschung wurde mit der Satzdefinition, Satzglieder begonnen, damit wir diese klar werden und dann werden die Felder des Satzes gut gekannt. Der erste Abschnitt schlieβt auch den Mittelfeld des Satzes und, wie man das Feld erkennen und bestimmen kann. Die Forschung untersucht auch. Ob es in der arabischen Sprache den selben Struktur wie im Deutschen gibt, z.B Bildung des Satzes sowie Satzfelder bezügllich das Mittelfeld.

Der zweite Abschnitt handelt sich um den arabischen Teil und behandelt die Wortarten im Arabischen sowie den Satz als auch Satzarten (Nominal- Verbal- Halbsatz).

Danach befinden

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Publication Date

Tue Nov 20 2018

Journal Name

Infection And Immunity

Acknowledgment of ad hoc reviewers

EDITORIAL The editors of Infection and Immunity are grateful to the following individuals

who provided reviews during the period from October 2017 through September 2018. Thank you for your invaluable support.

Huda Sahib

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