Publications

Displaying 1 - 25 of 83

Simulating Job Replication Versus its Energy Usage

December 10, 2023

Author(s)

Brian D. Cloteaux, Vladimir Marbukh

Due to the proliferation of computers in all aspects of our lives, the energy and ecological impacts of computing are becoming increasing important. Some of the transformative algorithms of recent years generate huge amounts of carbon dioxide, potentially

Impact of the Exposure Time and Distance Thresholds on the Performance of Automatic Contact Tracing

October 23, 2023

Author(s)

Brian D. Cloteaux, Vladimir Marbukh, Kamran Sayrafian

Automatic exposure notification apps operate based on guidelines that specify distance and time thresholds to measure the occurrence of contacts with infected individuals. In the United States 2 m/15 min thresholds are used to determine exposures due to a

Impact of Using Soft Exposure Thresholds in Automatic Contact Tracing

December 21, 2022

Author(s)

Kamran Sayrafian, Brian D. Cloteaux, Vladimir Marbukh

Current automatic exposure notification apps primarily operate based on hard distance/time threshold guidelines (e.g., 2 m/15 min in the United States) to determine exposures due to close contacts. However, the possibility of virus transmission through

On the Performance of Automatic Exposure Determination Using Bluetooth-based Proximity Estimation

August 11, 2022

Author(s)

Kamran Sayrafian, Brian D. Cloteaux, Vladimir Marbukh

The proximity detection mechanism in current automatic exposure notification systems is typically based on the Bluetooth signal strength from the individual's mobile phone. However, there is an underlying error in this proximity detection methodology that

Evaluation of the Bluetooth-based Proximity Estimation for Automatic Exposure Determination

February 10, 2022

Author(s)

Kamran Sayrafian, Brian D. Cloteaux, Vladimir Marbukh, Christian Emiyah

A commonly used methodology to estimate the proximity of two individuals in an automatic exposure notification system is using the signal strength of the Bluetooth signal from their mobile phones. However, there is an underlying error in this Bluetooth

Utility Proportional Resource Allocation for Users with Diverse SLAs in Virtualized Radio Access Networks

May 26, 2020

Author(s)

Vladimir Marbukh, Kamran Sayrafian, Behnam Rouzbehani

A virtualization platform is responsible for allocation and aggregation of radio resources from different access technologies as well as the distribution of the total capacity among Virtual Network Operators (VNOs). The Radio Resource Management (RRM)

A Joint Admission Control & Resource Management Scheme for Virtualized Radio Access Networks

December 16, 2019

Author(s)

Kamran Sayrafian, Vladimir V. Marbukh, Behnam Rouzbehani

A virtualization platform is responsible for allocation and/or aggregation of radio resources from different access technologies owned by the Infrastructure Providers (InPs). It is also responsible for the distribution of the total capacity among Virtual

Towards Fog Network Utility Maximization (FoNUM) for Managing Fog Computing Resources

September 2, 2019

Author(s)

Vladimir V. Marbukh

Fog computing is an emerging architecture, which extends the Cloud computing paradigm to the edge of the network, enabling new applications and services, including Internet of Things (IoT). End users have certain computation tasks, which can be completed

Towards Cross-Layer Optimization of Virtualized Radio Access Networks

August 15, 2019

Author(s)

Vladimir Marbukh, Kamran Sayrafian, Behnam Rouzbehani, Luis Correia

This paper proposes an approach to cross-layer optimization of virtualized Radio Access Network resources in future mobile communications. Assuming that the Virtual Network Operators (VNOs) guarantee contracted Service Level Agreements (SLAs) with the

SIS Contagion Avoidance on a Network Growing by Preferential Attachment

June 30, 2019

Author(s)

Brian D. Cloteaux, Vladimir V. Marbukh

The economic and convenience benefits of interconnectivity drive the current explosive growth in networked systems. However, as recent catastrophic contagious failures in numerous large-scale networked infrastructures have demonstrated, interconnectivity

Dynamic Job Replication for Balancing Fault Tolerance, Latency, and Economic Efficiency: Work in Progress

September 6, 2018

Author(s)

Vladimir V. Marbukh

Recent research has demonstrated benefits of replication of requests with canceling, which initiates multiple concurrent replicas of a request and uses the first successful result immediately removing the remaining replicas of the completed request from

On Mitigation Inefficiency of Selfish Investment in Network Recovery from High Loss SIS Infection

September 6, 2018

Author(s)

Vladimir V. Marbukh

This paper reports on quantification and mitigation of the inefficiency of selfish investment in network recovery from Susceptible Infected Susceptible (SIS) infection in a practically important case of high losses due to infection. In this case, both

Network Formation by Contagion Averse Agents: Modeling Bounded Rationality with Logit Learning

August 31, 2018

Author(s)

Vladimir V. Marbukh

Economic and convenience benefits of interconnectivity drive current explosive emergence and growth of networked systems. However, as recent catastrophic contagious failures in numerous large scale networked infrastructures demonstrated, these benefits of

Economics of Networked Infrastructures at the Edge of Undesirable Contagion: A Case of SIS Infection

July 9, 2018

Author(s)

Vladimir V. Marbukh

This paper reports on managing systemic risk of undesirable contagion in a networked system in a practically important case of high losses due to contagion. In this case, both socially optimal as well as selfish investments in the risk mitigation keep the

Towards Efficient Offloading in Fog/Edge Computing by Approximating Effect of Externalities

July 9, 2018

Author(s)

Vladimir V. Marbukh

Fog/Edge computing is an emerging architecture, which extends the Cloud computing paradigm to the edge of the network, enabling new applications and services, including Internet of Things (IoT). End devices have certain computation tasks, which can be

Towards Managing Age of Network State Information in Challenged Networks

July 8, 2018

Author(s)

Vladimir V. Marbukh

Age of Information (AoI) is a recently introduced metric for freshness of the real-time information, which requires frequent updates. This paper argues that AoI is useful not only for real-time network applications, but also for network state information

Fragility Risks of Low Latency Dynamic Queuing in Large-Scale Clouds: Complex System Perspective

January 23, 2018

Author(s)

Vladimir V. Marbukh

Economic, reliability, and low latency benefits of cloud computing model are the result of high level of dynamic resource sharing, made possible by high degree of system interconnectivity. This paper suggests more nuanced view of the effect of

Regret Minimization Based Adaptation of the Energy Detection Threshold in Body Area Networks

August 24, 2017

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian

IEEE802.15.6 is a radio interface standard for wireless connectivity of wearable and implantable sensors and actuators located inside or in close proximity to the human body i.e., Body Area Network (BAN). Medical applications impose stringent requirements

Systemic Risks in the Cloud Computing Model: Complex Systems Perspective

January 19, 2017

Author(s)

Vladimir V. Marbukh

This paper reports on quantification and management of inherent systemic risk/performance tradeoff in the cloud computing model. We view Cloud as a Complex System and associate the systemic risks with a possibility of system phase transition to the

Towards Cross-Layer Design of Communication Network for Smart Grid with Real-Time Pricing

December 12, 2016

Author(s)

Vladimir V. Marbukh

The efficiency of the emerging smart power grid infrastructure critically depends on the ability of the communication network to deliver real-time energy prices to the consumers. This papers contribution is twofold. First, it derives the relevant Quality

Towards Systemic Risk Aware Engineering of Large-Scale Networks: Complex Systems Perspective

December 8, 2016

Author(s)

Vladimir V. Marbukh

This paper proposes a framework for systemic risk aware engineering of large-scale networks. Economics drives two major evolutionary trends in networked system design/operation: (a) towards the boundary of the system capacity/operational region, where all

A Queue-Size & Channel Quality Based Adaptation of the Energy Detection Threshold in IEEE802.15.6 CSMA/CA

November 21, 2016

Author(s)

Vladimir V. Marbukh, Martina Barbi, Kamran Sayrafian, Mehdi Alasti

IEEE802.15.6 is a radio interface standard for a wireless connectivity of wearable and implantable sensors and actuators located inside or in close proximity to the human body i.e., Body Area Network (BAN). Medical applications impose stringent

Effect of Bounded Rationality on Tradeoff Between Systemic Risks & Economic Efficiency in Networks

August 11, 2016

Author(s)

Vladimir V. Marbukh

This paper discusses effect of bounded rationality on the systemic risks vs. economic performance tradeoff in large-scale networks operating under economic pressures. Existence of systemic risks in economically incentivized networked systems is

A Regret Matching Strategy Framework for Inter-BAN Interference Mitigation

February 4, 2016

Author(s)

Vladimir Marbukh, Kamran Sayrafian, Martina Barbi, Mehdi Alasti

A Body Area Network (BAN) is a radio standard for wireless connectivity of wearable and implantable sensors located inside or in close proximity to the human body. Medical and some other applications impose stringent constraints on battery powered BAN

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