Using Indicators to Monitor Security Risk in Systems of Systems

Author(s):  
Olav Skjelkvåle Ligaarden ◽  
Atle Refsdal ◽  
Ketil Stølen

Systems of systems are collections of systems interconnected through the exchange of services. Their often complex service dependencies and very dynamic nature make them hard to analyze and predict with respect to quality in general, and security in particular. In this chapter, the authors put forward a method for the capture and monitoring of impact of service dependencies on the security of provided services. The method is divided into four main steps focusing on documenting the system of systems and IT service dependencies, establishing the impact of service dependencies on risk to security of provided services, identifying measureable indicators for dynamic monitoring, and specifying their design and deployment, respectively. The authors illustrate the method in an example-driven fashion based on a case within power supply.

Author(s):  
Olav Skjelkvåle Ligaarden ◽  
Atle Refsdal ◽  
Ketil Stølen

Systems of systems are collections of systems interconnected through the exchange of services. Their often complex service dependencies and very dynamic nature make them hard to analyze and predict with respect to quality in general, and security in particular. In this chapter, the authors put forward a method for the capture and monitoring of impact of service dependencies on the security of provided services. The method is divided into four main steps focusing on documenting the system of systems and IT service dependencies, establishing the impact of service dependencies on risk to security of provided services, identifying measureable indicators for dynamic monitoring, and specifying their design and deployment, respectively. The authors illustrate the method in an example-driven fashion based on a case within power supply.


Author(s):  
Mateusz Iwo Dubaniowski ◽  
Hans Rudolf Heinimann

A system-of-systems (SoS) approach is often used for simulating disruptions to business and infrastructure system networks allowing for integration of several models into one simulation. However, the integration is frequently challenging as each system is designed individually with different characteristics, such as time granularity. Understanding the impact of time granularity on propagation of disruptions between businesses and infrastructure systems and finding the appropriate granularity for the SoS simulation remain as major challenges. To tackle these, we explore how time granularity, recovery time, and disruption size affect the propagation of disruptions between constituent systems of an SoS simulation. To address this issue, we developed a high level architecture (HLA) simulation of three networks and performed a series of simulation experiments. Our results revealed that time granularity and especially recovery time have huge impact on propagation of disruptions. Consequently, we developed a model for selecting an appropriate time granularity for an SoS simulation based on expected recovery time. Our simulation experiments show that time granularity should be less than 1.13 of expected recovery time. We identified some areas for future research centered around extending the experimental factors space.


2020 ◽  
Vol 1 ◽  
Author(s):  
Waylon J. Hastings ◽  
Dan T.A. Eisenberg ◽  
Idan Shalev

Abstract Technical challenges associated with telomere length (TL) measurements have prompted concerns regarding their utility as a biomarker of aging. Several factors influence TL assessment via qPCR, the most common measurement method in epidemiological studies, including storage conditions and DNA extraction method. Here, we tested the impact of power supply during the qPCR assay. Momentary fluctuations in power can affect the functioning of high-performance electronics, including real-time thermocyclers. We investigated if mitigating these fluctuations by using an uninterruptible power supply (UPS) influenced TL assessment via qPCR. Samples run with a UPS had significantly lower standard deviation (p < 0.001) and coefficient of variation (p < 0.001) across technical replicates than those run without a UPS. UPS usage also improved exponential amplification efficiency at the replicate, sample, and plate levels. Together these improvements translated to increased performance across metrics of external validity including correlation with age, within-person correlation across tissues, and correlation between parents and offspring.


2018 ◽  
Vol 5 (1) ◽  
pp. 60
Author(s):  
Nelson Obinna Omenugha

The National Bureau of Statistics recently announced that the entertainment and media (E&M) industry in Nigeria recorded growth of 1.86% to 12.81%; contributing N54bn to the country’s GDP. The industry’s revenue is projected to reach an estimated $8.5bn in 2018, from $4bn in 2013, with internet as one of the key drivers (PwC report, 2016, p.14). This comes at a time when Nigeria’s economy has shrunk by 2.24% since 2015 and receded by 0.18% from the previous quarter. Therefore, this study unpacks the possibilities and challenges of the impact of e-marketing tools on the growth of the Nigerian E&M industry. E-marketing tools provide “a unique combination of powerful capabilities for marketers” (Parsons et al., 2015). E-marketing suitability for the E&M industry lies in its lower capital demand, and a convenient and online means of disseminating marketing messages across a heterogeneous population at an unlimited geographical space. E-marketing is a reality in Nigeria as a study by Mathew, Ogedebe & Ogedebe (2013, p. 549) shows that “Many Nigerians who used (sic) the internet as one form of communication or another are bombarded daily with advertisements of products and services from industries in the country.” This reality has brought a shift from mechanical to electronic and from analogue to digital; ultimately impacting the marketing realms. The internet enables these electronic/digital platforms; which marketers (E&M industry) and customers (content consumers) rely on to effectively reach and receive communication content and feedback respectively.  However, this study examined the challenges that have possibly hindered the full realization of the e-marketing tools of the Nigerian E&M industry and noted among others; poor power supply and unreliable network infrastructure in the country. There is also an increased customer expectation, security, content copyright and privacy issues as well as the challenge of compliance demand in the industry as influenced by ever dynamic digital boundaries. There is a huge economic need for the Nigerian government to live up to its obligation and enhance power supply and boost network infrastructure. The Nigerian E&M industry needs to continually integrate different digital platforms to reach targets and attract more content consumers. Both the government and industry should increasingly learn and bring a global perspective that can help the nation adapt to the constantly changing digital environment.


2014 ◽  
Vol 529 ◽  
pp. 501-505
Author(s):  
Chi Zhang ◽  
Ming Zhi He

With the continuous development of power electronic technology, the advantages of thyristor power regulator circuit gradually get more and more applications. It improves the quality of power supply, makes the equipment efficiency and power factor higher and so saves a lot of electricity. Through the calculation of the primary current when thyristor turns off in three-phase power regulator circuit with transformer load, the impact of the thyristors turn-off order on the transformer primary current voltage-second product is analysised, and through simulation the exactness is verified.


2004 ◽  
Vol 36 (2) ◽  
pp. S437-S441 ◽  
Author(s):  
M Brunet ◽  
O Millán ◽  
O Jiménez ◽  
J.M Campistol ◽  
E Vidal ◽  
...  

2014 ◽  
Vol 4 (3) ◽  
pp. 144
Author(s):  
Modinat Olaitan Olusoji ◽  
Olusegun O. Oloba

The paper examines the impact of the National Economic Empowerment and Development Strategy (NEEDS) on the private sector by looking at the contribution the power sector had made in realizing the goal of making private enterprise the engine of growth in Nigeria. NEEDS reform is to  transform the power sector into one led by the private sector, with the role of government  restricted primarily in policy formulation and establishment of an appropriate legal and regulatory framework.  The paper discusses among many things: an overview of power supply in Nigeria; the effect of power sector on private sectors; challenges of the sector; as well as the ways forward. The paper concludes that there is   need to put concerted effort to generate adequate power supply to enable the private sector thrives and serves as engine of growth in Nigeria.


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