Preferred Language
Articles
/
XYZ-soYBIXToZYAL3LHN
Connectivity and rendezvous in distributed DSA networks
...Show More Authors

In this paper, we use concepts and results from percolation theory to investigate and characterize the effects of multi-channels on the connectivity of Dynamic Spectrum Access networks. In particular, we focus on the scenario where the secondary nodes have plenty of vacant channels to choose from-a phenomenon which we define as channel abundance. To cope with the existence of multi-channels, we use two types of rendezvous protocols: naive ones which do not guarantee a common channel and advanced ones which do. We show that, with more channel abundance, even with the use of either type of rendezvous protocol, it becomes difficult for two nodes to agree on a common channel, thereby potentially remaining invisible to each other. We model this invisibility as a Poisson thinning process and show that invisibility is even more pronounced with channel abundance. Following the disk graph model, we define and characterize connectivity of the secondary network in terms of the available number of channels, deployment densities, number of transceivers per node, and communication range. When primary users are absent, we derive the critical number of channels which maintains super-criticality of the secondary network. When primary users are present, we characterize and analyze the connectivity for all the regions: channel abundance, optimal, and channel deprivation. Our results can be used to decide on the goodness of any channel rendezvous algorithm by computing the expected resultant connectivity.

Scopus Crossref
Publication Date
Sun Mar 15 2020
Journal Name
Journal Of The College Of Education For Women
The Dilemma of Domestic Violence in Susan Glaspell’s Trifles
...Show More Authors

Domestic violence, or as sometimes known as family abuse, is usually related to a domestic or local setting as in cohabitation or in marriage. It can take the forms of being physical, verbal, economic or emotional. Globally, most of the domestic violence is overwhelmingly directed to females as they tend to experience and receive severe forms of violence, most likely because they do not involve their intimate, or sometimes even non-intimate partners, in the process of mental and physical self-defense.    Sometimes countries justify domestic violence directed to females, they may be legally permitted when the reasons behind it are related to issues of women's infidelity. Usually, the permission to violent acts is related to

... Show More
View Publication
Crossref
Publication Date
Tue Mar 15 2022
Journal Name
Al-academy
Dramatic function of temporal variables in the feature film
...Show More Authors

Time and space are indispensable basics in cinematic art. They contain the characters, their actions and the nature of events, as well as their expressive abilities to express many ideas and information. However, the process of collecting space and time in one term is space-time, and it is one of Einstein’s theoretical propositions, who sees that Time is an added dimension within the place, so the study here differs from the previous one, and this is what the researcher determined in the topic of his research, which was titled (The Dramatic Function of Space-Time Variables in the Narrative Film), Which included the following: The research problem, which crystallized in the following question: What is the dramatic function of the tempor

... Show More
View Publication Preview PDF
Crossref
Publication Date
Thu Oct 15 2015
Journal Name
Alustath Journal For Human And Social Sciences
The Ultimate Fox in Lillian Hellman’s The Little Foxes
...Show More Authors

Lillian Hellman was an American playwright whose name was associated with the moral values of the early twentieth century. Her plays were remarkable for the moral themes that dealt with the evil. They were distinguished, as well, for the depiction of characters who are still alive in the American drama for their vivid personalities, effective roles and realistic portrayal. This paper studies Lillian Hellman’s The Little Foxes as a criticism of the American society in the early twentieth-century. Though America was a country built on hopes and dreams of freedom and happiness. During the Great Depression, happiness was certainly not present in many people's lives. The presence of alternate political ideas, decay of love and values increased

... Show More
View Publication
Crossref
Publication Date
Wed Mar 26 2025
Journal Name
قضايا سياسية
The role of strategic planning in American decision-making
...Show More Authors

The purpose of this research is to study the organic planning in the United Industry Alliance, focusing on an applied model. It takes the concept of good planning, and its importance in the overall picture, well into political, economic, and military policy. It also analyzes how the United States has used this year to address the challenges that nationalism targets. The research draws on typical examples to illustrate the differences between researcher and decision effectiveness. It also discusses the factors that lead to the success or failure of dynamic planning, and draws lessons from it in other countries. Finally, the researcher begins to help in planning the goal as a basic tool in enhancing effectiveness.

Publication Date
Thu Oct 12 2023
Journal Name
Mustansiriyah Journal Of Pure And Applied Sciences
Cavitation microbubbles in the medical ultrasound imaging: A Review
...Show More Authors

Ultrasound is a mechanical energy which can generate altering zones of compression and rarefaction along its path in the tissues. Ultrasound imaging can provide a real time screening for blood and multiple organs to aiding the diagnostic and treatment. However, ultrasound has the potential to deposit energy in the blood and tissues causing bio effects which is depending on ultrasound characteristics that including frequency and the amount of intensity. These bio effects include either a stable cavitation presented non thermal effects or inertial cavitation of harmful effect on the tissues. The non-thermal cavitation can add features in diagnostic imaging and treatment more than the inertial cavitation. Ultrasound Contrast agents are a micro

... Show More
Publication Date
Fri Sep 20 2013
Journal Name
World Journal Of Experimental Biosciences (issn: 2313-3937)
T-Lymphocytes Subsets in inactive carrier state of HBV
...Show More Authors

This study included nine patients with inactive carrier states of HBV and 14 healthy control groups. The number and the percentage of T-lymphocyte (CD3+ Cells) in the peripheral blood of these groups showed no significant difference. Similar trend was observed when number and percentages of T helper cells (CD4+ cells) and T cytotoxic lymphocytes (CD8+ cells). Moreover, no significant difference in CD4+ /CD8+ cells ratio (P > 0.05) in peripheral blood of patients with inactive carrier state of HBV as compared with healthy control group. The levels of total serum bilirubin (TSB) concentration and alanine aminotransferase (ALT) activity were similar to control group. The levels of immunoglobulin concentration (IgG and IgM) in patients g

... Show More
View Publication Preview PDF
Publication Date
Fri Sep 15 2023
Journal Name
Al-adab Journal
Ruthlessness against Women during Wars in Danai Gurira's Eclipsed
...Show More Authors

لقد تسبب انتشار الإرهاب في العالم وكذلك الحروب الأهلية والصراعات في أوائل القرن الحادي والعشرين في جميع أنحاء العالم في الكثير من الأضرار وخلفت ضحايا جسيمة. أدت الهجمات الإرهابية على النساء، مثل اختطاف بوكو حرام لأكثر من 270 تلميذة في نيجيريا وتقارير عن انتشار الاغتصاب والاعتداء الجنسي في المناطق التي مزقتها الحرب، إلى إنتاج العديد من العروض المسرحية في الولايات المتحدة التي تصور خواص الجناة وكذلك الضحا

... Show More
View Publication
Crossref
Publication Date
Wed Jun 29 2022
Journal Name
Journal Of The College Of Education For Women
EFL Student- Teachers' Perception in the Culture of Thinking
...Show More Authors

Many studies have recommended implying the skills and strategies of creative thinking, critical thinking, and reflective thinking in EFLT curriculum to overcome EFL teaching-learning process difficulties. It is really necessary to make EFL teachers aware of the importance of cultural thinking and have a high perception of its forces. Culture of thinking consists of eight cultural forces in every learning situation; it helps to shape the group's cultural dynamic. These forces are expectations, language, time, modeling, opportunities, routines, interactions, and environment. This study aims to investigate EFL student-teachers’ perceptions of cultural thinking. The participants are selected randomly from the fourth-stage students at the D

... Show More
View Publication Preview PDF
Crossref
Publication Date
Sat Mar 01 2008
Journal Name
Iraqi Journal Of Physics
Investigation of Electromagnetically Induced Transparency in the Rubidium Vapor
...Show More Authors

We have studied theoretically the response of atomic three- level cascade scheme
of rubidium vapor to a strong laser under conditions in which electromagnetically
induced transparency would be induced on a weak probe beam. We show that the
medium that is an opaque to a probe laser can, by applying both lasers
simultaneously, be made transparent.

View Publication Preview PDF
Publication Date
Fri Jun 30 2006
Journal Name
Al-kindy College Medical Journal
Oral Carriage Rate of Candida Species in Diabetic Patients
...Show More Authors

Background: It is well known that oral carriage
of Candida species increase in many situations, like
obesity, debility, leukemia, viral infection, use of
certain drugs in addition to diabetes mellitus.
Objective: find the relation between diabetes and
its control on oral carriage of Candida.
Methods: Thirty four hundred oral swabs from
diabetic patients 67% are females and 33% are
males, 41.7% are type 1 diabetes and 58.3% are type
2.different culture media are used.
Results: we found that 37.9% of diabetics had oral
carriage, older age group had more but the
difference is not significant statistically P>0.05, in
addition females carry more Candida than males
P<0.05, while type of diabetes

... Show More
View Publication Preview PDF