scholarly journals New Approach for Mobility Management in Openflow/Software-Defined Networks

2018 ◽  
Author(s):  
N. Omheni ◽  
F. Zarai ◽  
B. Sadoun ◽  
M. S. Obaidat
Keyword(s):  
Mobility Management ◽  
Software Defined Networks ◽  
New Approach

scholarly journals Virtualization of Network infrastructure in Educational Institutions

2020 ◽  
pp. 51-56
Author(s):  
V. P. Kochin ◽  
Yu. I. Vorotnitsky ◽  
A. V. Zherelo
Keyword(s):  
Educational Institution ◽  
Virtual Network ◽  
Educational Institutions ◽  
Software Defined Networks ◽  
State University ◽  
Network Infrastructure ◽  
New Approach ◽  
On Demand ◽  
Virtual Infrastructure ◽  
Data Processing Center

The article discusses current issues of virtualization of the network infrastructure of educational institutions. The analysis of the literature on this issue. A new approach to creating a cloud virtualization environment for the educational institution’s network infrastructure is proposed, which is based on the joint use of virtualization technologies and software-defined networks. This approach allows you to unify the process of creating a network infrastructure, scale the resources provided on demand with minimal organizational and technical costs. The data processing center of the Belarusian State University has implemented a model that includes virtual network segments. Using virtualization technologies and software-defined networks allows you to unify the process of creating network infrastructure, scale the resources provided on demand with minimal organizational and technical costs, adapt the virtual infrastructure to the requirements of a particular educational institution.

Mobility Management for Intro/Inter Domain Handover in Software-Defined Networks

2019 ◽  
Vol 37 (8) ◽  
pp. 1739-1754 ◽  
Author(s):  
Yuanguo Bi ◽  
Guangjie Han ◽  
Chuan Lin ◽  
Mohsen Guizani ◽  
Xingwei Wang
Keyword(s):  
Mobility Management ◽  
Software Defined Networks

scholarly journals Mobility management using mobility credit models

2020 ◽  
Vol 66 (4) ◽  
pp. 41-50
Author(s):  
Draženko Glavić ◽  
Marina Milenkovic ◽  
Ratko Pavlović
Keyword(s):  
Mobility Management ◽  
Traffic Congestion ◽  
Congestion Pricing ◽  
New Approach ◽  
Global Problems ◽  
Additional Costs ◽  
The Subject

Traffic congestion is one of the biggest global problems worldwide, for which appropriate solution has not been found yet. Bearing that in mind, the paper presents a new approach for solving traffic congestion through "Mobility credits" model. This model is an alternative to congestion pricing - a concept that successfully solves the problem of traffic congestion, but which is not socially and politically acceptable due to the additional costs of users. The "mobility credits" model has not been applied in practice yet, but it is the subject of numerous analyzes, in order to determine the efficiency of this model in solving the problem of congestion. The paper gives an overview of previous research regarding the "Mobility credits" model.

A new approach for detecting violation of data plane integrity in Software Defined Networks

2021 ◽  
pp. 1-18
Author(s):  
Ghandi Hessam ◽  
Ghassan Saba ◽  
M. Iyad Alkhayat
Keyword(s):  
False Alarms ◽  
Flow Rule ◽  
Security Threats ◽  
Software Defined Networks ◽  
Method Performance ◽  
New Approach ◽  
Flow Table ◽  
Data Plane ◽  
Abnormal Behaviors ◽  
Sdn Controller

The scale of Software Defined Networks (SDN) is expanding rapidly and the demands for security reinforcement are increasing. SDN creates new targets for potential security threats such as the SDN controller and networking devices in the data plane. Violation of data plane integrity might lead to abnormal behaviors of the overall network. In this paper, we propose a new security approach for OpenFlow-based SDN in order to detect violation of switches flow tables integrity and successfully locate the compromised switches online. We cover all aspects of integrity violation including flow rule adding, modifying and removing by an unauthorized entity. We achieve this by using the cookie field in the OpenFlow protocol to put in a suitable digest (hash) value for each flow entry. Moreover, we optimize our method performance by calculating a global digest value for the entire switch’s flow table that decides whether a switch is suspected of being compromised. Our method is also able to determine and handle false alarms that affect the coherence of a corresponding table digest. The implementation is a reactive java module integrated with the Floodlight controller. In addition, we introduce a performance evaluation for three different SDN topologies.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Processing Immunoperoxidase Labeled Cell Monolayers and Cryostat Sesctions For Electron Microscopy

1985 ◽  
Vol 43 ◽  
pp. 714-715
Author(s):  
K. Chien ◽  
R. Van de Velde ◽  
I.P. Shintaku ◽  
A.F. Sassoon
Keyword(s):  
Cell Monolayer ◽  
Cell Types ◽  
Surface Antigens ◽  
Immunoperoxidase Method ◽  
Reaction Step ◽  
Hot Plate ◽  
Air Drying ◽  
New Approach ◽  
Cell Monolayers ◽  
Glass Slides

Immunoelectron microscopy of neoplastic lymphoma cells is valuable for precise localization of surface antigens and identification of cell types. We have developed a new approach in which the immunohistochemical staining can be evaluated prior to embedding for EM and desired area subsequently selected for ultrathin sectioning.A freshly prepared lymphoma cell suspension is spun onto polylysine hydrobromide- coated glass slides by cytocentrifugation and immediately fixed without air drying in polylysine paraformaldehyde (PLP) fixative. After rinsing in PBS, slides are stained by a 3-step immunoperoxidase method. Cell monolayer is then fixed in buffered 3% glutaraldehyde prior to DAB reaction. After the DAB reaction step, wet monolayers can be examined under LM for presence of brown reaction product and selected monolayers then processed by routine methods for EM and embedded with the Chien Re-embedding Mold. After the polymerization, the epoxy blocks are easily separated from the glass slides by heatingon a 100°C hot plate for 20 seconds.

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