Optimization of OSPF Link Weights to Counter Network Failure

2011 ◽  
Vol E94-B (7) ◽  
pp. 1964-1972 ◽  
Author(s):  
Mohammad Kamrul ISLAM ◽  
Eiji OKI
Keyword(s):  
Network Failure

scholarly journals Dynamic Computation Offloading Scheme for Drone-Based Surveillance Systems

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2982 ◽  
Author(s):  
Bongjae Kim ◽  
Hong Min ◽  
Junyoung Heo ◽  
Jinman Jung
Keyword(s):  
Response Time ◽  
Target Object ◽  
Computation Offloading ◽  
Moving Target ◽  
Surveillance Systems ◽  
Network Failure ◽  
Dynamic Computation ◽  
Tracking Time ◽  
Time Required ◽  
Time Critical

Recently, various technologies for utilizing unmanned aerial vehicles have been studied. Drones are a kind of unmanned aerial vehicle. Drone-based mobile surveillance systems can be applied for various purposes such as object recognition or object tracking. In this paper, we propose a mobility-aware dynamic computation offloading scheme, which can be used for tracking and recognizing a moving object on the drone. The purpose of the proposed scheme is to reduce the time required for recognizing and tracking a moving target object. Reducing recognition and tracking time is a very important issue because it is a very time critical job. Our dynamic computation offloading scheme considers both the dwell time of the moving target object and the network failure rate to estimate the response time accurately. Based on the simulation results, our dynamic computation offloading scheme can reduce the response time required for tracking the moving target object efficiently.

scholarly journals Feasibility of SMS to remind pregnant and breastfeeding women living with HIV to take antiretroviral treatment in Kilimanjaro region, Tanzania: a pilot study

2020 ◽  
Vol 4 (2) ◽  
pp. 140-148
Author(s):  
Kennedy M Ngowi ◽  
Eusebious Maro ◽  
Rob E Aarnoutse ◽  
Blandina T Mmbaga ◽  
Mirjam A. G Sprangers ◽  
...  
Keyword(s):  
Pilot Study ◽  
Antiretroviral Treatment ◽  
Network Failure ◽  
Women Living With Hiv ◽  
Resource Limited ◽  
Sms Reminders ◽  
Kilimanjaro Christian Medical Centre ◽  
Living With Hiv ◽  
Lost To Follow Up ◽  
Privacy Issues

Background: Pregnant and breastfeeding Women Living with HIV (WLHIV) often have difficulties in reaching adequate levels of adherence (>95%) to Antiretroviral treatment. “Forgetting” is the most commonly mentioned reason. Sending reminders via SMS is expected to improve adherence. We conducted a pilot study to investigate acceptability, user experience and technical feasibility of sending reminder-SMS to WLHIV. Methods: This was a 6-months observational pilot-study among WLHIV attending antenatal and postnatal care at Kilimanjaro Christian Medical Centre in Moshi, Tanzania. Women received a reminder-SMS 30 minutes before usual time of intake. One hour later, they received an SMS asking whether they took medication to which they could reply with ‘Yes’ or ‘No’. Messages were sent 3 times a week on randomly chosen days to prevent reliance on daily messages. We calculated the percentage of number of SMS delivered, failed to be delivered, and replied to. We analysed feedback from exit-interviews about experience with the SMS-reminders. Results: 25 women were enrolled (age 18-45), 2 were lost to follow up. 5,054 messages were sent of which 53 failed to be delivered (1%). 1,880 SMS were sent with a question if medication was taken; 1,012 (54%) messages were replied to, of which 1,003 (99%) were replied with ‘YES’ and closely to ‘YES’, and a total of 9 (1%) with ‘NO’ and ‘closely to NO’. 868 messages (46%) were not responded to due to either dropout, change of phone number, loss of phone or network failure. Results from 18 interviews showed that 16 (89%) women were satisfied with SMS reminders. 2 (11%) were concerned about unwanted disclosure because of the content ‘don’t forget to take medication’ and one reported other privacy issues (6%). 3 (17%) women experienced stigma. Conclusion: 99%of SMS being delivered indicates that SMS reminders in this resource-limited setting are technically feasible. However, concerns regarding privacy were noted, specifically the risk of unwanted disclosure and the experience of stigma. Participants indicated that being made aware of their adherence, motivated them to adhere better. However, personalised and more neutral content of the SMS might be a way to improving the intervention.

scholarly journals Exploring Extreme Signaling Failures in Intracellular Molecular Networks

2021 ◽  
Author(s):  
Mustafa Ozen ◽  
Effat S. Emamian ◽  
Ali Abdi
Keyword(s):  
Intracellular Signaling ◽  
Molecular Mechanisms ◽  
Incorrect Response ◽  
Complex Trait ◽  
Molecular Networks ◽  
Signaling Networks ◽  
Initial Increase ◽  
Network Failure ◽  
Human Disorders ◽  
Cell Signaling Networks

AbstractDeveloping novel methods for the analysis of intracellular signaling networks is essential for understanding interconnected biological processes that underlie complex human disorders. A fundamental goal of this research is to quantify the vulnerability of a signaling network to the dysfunction of one or multiple molecules, when the dysfunction is defined as an incorrect response to the input signals. In this study, we propose an efficient algorithm to identify the extreme signaling failures that can induce the most detrimental impact on the physiological function of a molecular network. The algorithm basically finds the molecules, or groups of molecules, with the maximum vulnerability, i.e., the highest probability of causing the network failure, when they are dysfunctional. We propose another algorithm that efficiently accounts for signaling feedbacks in this analysis. The algorithms are tested on two experimentally verified ERBB and T cell signaling networks. Surprisingly, results reveal that as the number of concurrently dysfunctional molecules increases, the maximum vulnerability values quickly reach to a plateau following an initial increase. This suggests the specificity of vulnerable molecule (s) involved, as a specific number of faulty molecules cause the most detrimental damage to the function of the network. Increasing a random number of simultaneously faulty molecules does not further deteriorate the function of the network. Such a group of specific molecules whose dysfunction causes the extreme signaling failures can better elucidate the molecular mechanisms underlying the pathogenesis of complex trait disorders, and can offer new insights for the development of novel therapeutics.

scholarly journals A Nonlinear Model For The Optimal Capacity Placement In Self-Healing ATM Networks Based On Link Restoration Strategy

2021 ◽  
Author(s):  
ABM B. Alam
Keyword(s):  
Communication Systems ◽  
Large Scale ◽  
Performance Metrics ◽  
Asynchronous Transfer Mode ◽  
Critical Issue ◽  
Self Healing ◽  
Network Failure ◽  
Optimal Capacity ◽  
Telecommunications Network ◽  
Important Challenge

Network Survivability is a critical issue in telecommunications network due to increasing dependence of the society on communication systems. Fast restoration from a network failure is an important challenge that deserves attention. This thesis addresses an optimal link capacity design problem for survivable asynchronous transfer mode (ATM) network based on the link restoration strategy. Given a projected traffic demands and the network topology, capacity and flow assignment are jointly optimized to yield the optimal capacity placement. The problem is formulated as large-scale nonlinear programming and is solved using a specific type of Lagrange method (so called Separable Augmented Lagrangian Algorithm or SALA for short). Several networks with diverse topological characteristics are used in the experiments to validate our proposed novel model, using capacity installation cost, routing cost, total network cost, used capacity and required CPU time, as performance metrics. Link restoration strategy is compared against global reconfiguration strategy using these performance metrics.

scholarly journals Differentiated Service Model-Supported Cluster-Based Routing in Wireless Sensor Networks

2020 ◽  
Vol 3 ◽  
pp. 1-9
Author(s):  
Jayashree Agarkhed ◽  
Patil Yogita Dattatraya ◽  
Siddarama R. Patil
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Multimedia Data ◽  
Wireless Sensor ◽  
Differentiated Service ◽  
Healthcare Applications ◽  
Network Failure ◽  
Critical Data ◽  
Cluster Based Routing ◽  
Time Critical

Wireless Sensor Network finds its extensive use in healthcare applications for the transfer of time-critical data through wireless connectivity. The primary cause of network failure is the transfer of time-critical multimedia data. The article presents a new differentiated service modelsupported (DSM) cluster-based routing in wireless sensor networks (WSNs) that overcomes the above issue. DSM prioritizes the transfer of different flow types based on packet type and packet size. The employment of computational offloading minimizes delay for critical and small-sized data packets and by carrying out data reduction of large-sized packets at proxy server. It outperforms the existing protocols in terms of energy efficiency, throughput, and reliability by prioritizing the transfer of time-critical health application data

A CNN-based network failure prediction method with logs

2018 ◽  
Author(s):  
Weiliang Ji ◽  
Shihui Duan ◽  
Renai Chen ◽  
Song Wang ◽  
Qiang Ling
Keyword(s):  
Failure Prediction ◽  
Prediction Method ◽  
Network Failure
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