Autonomic Healing for Service Specific Overlay Networks

2012 ◽  
Vol 7 (2) ◽  
pp. 46-59
Author(s):  
Ibrahim Al-Oqily ◽  
Bassam Subaih ◽  
Saad Bani-Mohammad ◽  
Jawdat Jamil Alshaer ◽  
Mohammed Refai
Keyword(s):  
Overlay Networks ◽  
Network System ◽  
Self Healing ◽  
Virtual Networks ◽  
Multimedia Delivery ◽  
Different Types ◽  
Underlying Network ◽  
Delivery Services ◽  
Basic Concepts ◽  
Control And Management

Service Specific Overlay Networks (SSONs) have recently attracted a great interest, and have been extensively investigated in the context of multimedia delivery over the internet. SSONs are virtual networks constructed on top of the underlying network and they have been proposed to provide and improve services not provided by other traditional networks to the end users. The increased complexity and heterogeneity of these networks in addition to ever changing conditions in the network and the different types of fault that may occur make their control and management by human administrators more difficult. Therefore, self-healing concept was introduced to handle these changes and assuring highly reliable and dependable network system performance. Self-healing aims at ensuring that the service will continue to work regardless of defects that might occur in the network. This paper introduces literature in the area of self-healing overlay networks, presents their basic concepts, requirements, and architectures. In addition to that the authors present a proposed self-healing architecture for multimedia delivery services. Their proposed solution is oriented to discover new approaches for monitoring, diagnosing, and recovering of services thus achieving self-healing.

scholarly journals The Structure of Incomplete Destructive Breakdown Spots in Thin Polymer Films

1974 ◽  
Vol 1 (1) ◽  
pp. 65-73 ◽  
Author(s):  
S. Sapieha ◽  
W. Jablonski ◽  
M. Kryszewski
Keyword(s):  
Energy Levels ◽  
Thin Layers ◽  
Channel Structure ◽  
Self Healing ◽  
Thin Polymer Films ◽  
Complete Destruction ◽  
Thin Polymer ◽  
Different Types ◽  
Non Destructive ◽  
Partial Destruction

Experimental observations are given on the structure of breakdown spots in thin layers of polystyrene and polybenzene obtained by a glow discharge technique. The levels of energy associated with different types of breakdown are identified and it is shown that within the range of breakdown energy level, lower than 10-5joules, non-destructive breakdown takes place. At higher energies, partial destruction of the breakdown channel occurs and with energy levels greater than 5 × 10-3joules, single hole, self-healing breakdown with complete destruction of the inner morphological channel structure occurs.The nature of the breakdown is discussed in electrical and electronmicroscopy terms.

Hierarchies

2003 ◽  
pp. 91-115 ◽  
Author(s):  
Elaheh Pourabbas ◽  
Maurizio Rafanelli
Keyword(s):  
Hierarchical Structures ◽  
Different Types ◽  
Basic Concepts ◽  
Points Of View

In this chapter we will focus on the rules of aggregation hierarchies in analysis dimensions of a cube. We give an overview of the related works on the basic concepts of the different types of aggregation hierarchies. We then discuss the hierarchies from two different points of view: mapping between domain values and hierarchical structures. In relation to them, we introduce the characterization of some OLAP operators on hierarchies and give a set of operators that concern the change in the hierarchy structure. Finally, we propose an enlargement of the operator set concerning hierarchies.

The Contribution of MDA in Software-Defined Network

2021 ◽  
pp. 118-134
Author(s):  
Adra Hammoud ◽  
Mohamed Lahmer ◽  
Samir Mbarki ◽  
Fatima Sifou
Keyword(s):  
Software Defined Networking ◽  
Modeling Language ◽  
Software Defined Network ◽  
Model Driven Engineering ◽  
Model Driven ◽  
Level Of Abstraction ◽  
Comprehensive Survey ◽  
Basic Concepts ◽  
Control And Management ◽  
The Way

Software-defined networking is changing the way we design and manage networks. This prominent paradigm based on the separation of control and management plane is highly heterogeneous with different devices from various technologies and leads to an incredible growing of materials. As SDN expands in size of devices and complexity, it faces greater administrative and management challenges. The paradigm of MDA was introduced using NETCONF/YANG as a way to model in order to deal with these management challenges and soften the development of SDN applications. The researchers joined the MDA and its related concepts as model-driven engineering to SDN to implement a platform called model-driven networking increasing the level of abstraction on development. This chapter presents a comprehensive survey of the research relating to MDN paradigm. It starts by introducing the basic concepts of SDN. Next, it presents the concepts related to MDA, and the YANG which is a modeling language. Last, it highlights the studies introducing the MDN paradigm and its benefits in SDN applications.

scholarly journals Self-healing concrete-What Is it Good For?

2021 ◽  
Vol 71 (341) ◽  
pp. e237
Author(s):  
M. Roig-Flores ◽  
S. Formagini ◽  
P. Serna
Keyword(s):  
Sodium Silicate ◽  
Critical Discussion ◽  
Natural Process ◽  
Self Healing ◽  
Vascular Networks ◽  
Superabsorbent Polymers ◽  
Basic Concepts ◽  
Good For ◽  
Concrete Matrix

Self-healing of concrete is the process in which the material regenerates itself repairing inner cracks. This process can be produced by autogenous or autonomous healing. Autogenous healing is a natural process, produced by carbonation and/or continuing hydration. Autonomous healing is based on the use of specific agents to produce self-healing, which can be added directly to the concrete matrix, embedded in capsules or introduced through vascular networks. Some examples are superabsorbent polymers, crystalline admixtures, microencapsulated sodium silicate, and bacteria. This review is structured into two parts. The first part is an overview of self-healing concrete that summarises the basic concepts and the main advances produced in the last years. The second part is a critical discussion on the feasibility of self-healing concrete, its possibilities, current weaknesses, and challenges that need to be addressed in the coming years.

scholarly journals Basic Concepts of Structural Design for Architecture Students

2021 ◽  
Author(s):  
Anahita Khodadadi ◽  
Keyword(s):  
Material Properties ◽  
Structural Design ◽  
Structural Systems ◽  
Structural Elements ◽  
Math Problem Solving ◽  
Vector Addition ◽  
Rules Of Thumb ◽  
Different Types ◽  
Internal Forces ◽  
Basic Concepts

This book aims to narrate fundamental concepts of structural design to architecture students such that they have minimum involvement with math problem-solving. Within this book, students learn about different types of loads, forces and vector addition, the concept of equilibrium, internal forces, geometrical and material properties of structural elements, and rules of thumb for estimating the proportion of some structural systems such as catenary cables and arches, trusses, and frame structures.

scholarly journals Awareness of Knowledge Management in Nepalese Financial Institutions

2017 ◽  
Vol 3 (3) ◽  
pp. 76-88
Author(s):  
Lekhanath Khanal
Keyword(s):  
Knowledge Management ◽  
Financial Institutions ◽  
Academic Research ◽  
Knowledge Resources ◽  
Business Context ◽  
Different Types ◽  
Intellectual Assets ◽  
Strategic Impact ◽  
Basic Concepts ◽  
Almost All

Knowledge Management (KM) is one of the buzzwords prevailing in the management circles. It is seen as a tool which can create a strategic impact. Organizations which are unaware of knowledge management (KM) and its concepts are considered illiterate in business context. In order to thrive in this turbulent market, an organization must be familiar with all concepts pertaining to its intellectual assets, i.e. Knowledge, and all other activities involved in managing its intangible assets, i.e. KM through various practices, suitable strategy and processes,. Banks and financial institutions as drivers of economic growth play a major role in prosperity and innovativeness of almost all countries worldwide. The main objective of this study is to identify the awareness of knowledge management in financial institutions of Nepal. In this study, samples of 385 respondents were selected randomly from four different types of financial institutions of Kathmandu, Nepal. The statistical analysis was done to draw the conclusion. The results clearly show that the level of KM awareness amongst Nepalese financial institutions is medium in which some companies understand the principles of KM but they observe many challenges and difficulties in pursuing KM implementation. Finally, this paper concludes that those institutions which are aware of the basic concepts and principle of KM can effectively manage knowledge resources; are more innovative and have better performance than others who do not takes this factor into account.Journal of Advanced Academic Research, Vol. 3, No. 3, 2016

scholarly journals Laboratory Evaluation on Performance of Fiber-Modified Asphalt Mixtures Containing High Percentage of RAP

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Yuefeng Zhu ◽  
Yanwei Li ◽  
Chundi Si ◽  
Xiaote Shi ◽  
Yaning Qiao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Binder ◽  
Temperature Stability ◽  
Asphalt Mixtures ◽  
Self Healing ◽  
Test Results ◽  
Moisture Susceptibility ◽  
Modified Asphalt ◽  
Modified Binders ◽  
Different Types

In recent years, the significant demand for sustainable paving materials has led to a rapid increase in the utilization of reclaimed asphalt pavement (RAP) materials. When RAP is mixed with virgin asphalt concrete, particularly when its percentage is high, performance of the binder and asphalt concrete can be adversely affected. For this reason, different types of additives need to be identified and evaluated beforehand to mitigate the adverse effects. In this study, different types of fiber materials were identified and selected as binder/mixture additives, including lignin fiber (LF), polyester fiber (PF), and basalt fiber (BF). Various samples of fiber-modified binders and asphalt mixtures with different RAP contents (0%, 20%, and 40%) were prepared and were evaluated using two sets of laboratory testing: (i) dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests were performed to study the rheological properties of fiber-modified binders; (ii) the wheel tracking test, bending creep test, moisture susceptibility test, fatigue test, and self-healing fatigue test were conducted to characterize the laboratory properties of fiber-modified RAP mixtures. Test results for the modified binders show that the BF-modified binder has the greatest positive effect on the high-temperature performance of the asphalt binder, followed by PF- and LF-modified binders. However, the virgin asphalt shows the best low-temperature property than the fiber-modified asphalt binder. Test results for the whole RAP mixtures show that all fibers have a significant effect on the properties (including high- and low-temperature stability, moisture susceptibility, fatigue, and self-healing ability) of RAP mixtures. Among them, adding BF shows the greatest improvement in high-temperature stability, fatigue resistance, and self-healing ability of RAP mixtures. LF is found to significantly enhance low-temperature properties, and PF can greatly improve the resistance to moisture damage of RAP mixtures. For high percentage of RAP using on sites, adding multiple additives may further enhance its durability.

Sign in / Sign up

Export Citation Format

Share Document