subject:(critical node)

1. Khajehabdollahi, Sina. Phase transitions of Integrated Information in the Generalized Ising Model of the Brain.

Degree: 2018, University of Western Ontario

► The bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the… (more)

Subjects/Keywords: integrated information; consciousness; ising model; criticality; phase transitionsThe bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the brain. Small 5-node networks are simulated on the Ising model with Metropolis transitions where the fitting parameter $T$ is fit to empirical functional connectivity matrices of healthy human subjects. Fitting to criticality; results indicate that integrated information undergoes a phase transition at the critical temperature $T_c$. The results are interpreted in the context of an emerging perspective of the science of complexity and perhaps even the philosophy of science; the universe as a self-organizing critical system undergoing cascades of phase transitions into complexity.; complexity

…critical system. Integrated information, a measure of consciousness proposed by the Integrated… …combined with the emerging physical perspective of the critical brain to explore the interaction… …order parameter, seems to undergo a phase transition at the critical temperature of the Ising… …recent arguments that complexity, life, and consciousness all tend to be critical systems… …through evolution due to the adaptive capabilities of critical systems (Goldenfeld and…

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APA (6^th Edition):

Khajehabdollahi, S. (2018). Phase transitions of Integrated Information in the Generalized Ising Model of the Brain. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/5241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khajehabdollahi, Sina. “Phase transitions of Integrated Information in the Generalized Ising Model of the Brain.” 2018. Thesis, University of Western Ontario. Accessed February 26, 2021. https://ir.lib.uwo.ca/etd/5241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khajehabdollahi, Sina. “Phase transitions of Integrated Information in the Generalized Ising Model of the Brain.” 2018. Web. 26 Feb 2021.

Vancouver:

Khajehabdollahi S. Phase transitions of Integrated Information in the Generalized Ising Model of the Brain. [Internet] [Thesis]. University of Western Ontario; 2018. [cited 2021 Feb 26]. Available from: https://ir.lib.uwo.ca/etd/5241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khajehabdollahi S. Phase transitions of Integrated Information in the Generalized Ising Model of the Brain. [Thesis]. University of Western Ontario; 2018. Available from: https://ir.lib.uwo.ca/etd/5241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oxford

2. Gomez, Michael. Ghosts and bottlenecks in elastic snap-through.

Degree: PhD, 2018, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:11ab7b19-ee4b-4cd6-ac9a-116363a4e4d7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.757801

► Snap-through is a striking instability in which an elastic object rapidly jumps from one state to another. It is seen in the leaves of the… (more)

▼ Snap-through is a striking instability in which an elastic object rapidly jumps from one state to another. It is seen in the leaves of the Venus flytrap plant and umbrellas flipping on a windy day among many other examples. Similar structures that snap-through are used to generate fast motions in soft robotics, switches in micro-scale electronics and artificial heart valves. Despite the ubiquity of snap-through in nature and engineering, its dynamics is usually only understood qualitatively. In this thesis we develop analytical understanding of this dynamics, focussing on how the mathematical structure underlying the snap-through transition controls the timescale of instability. We begin by considering the dynamics of 'pull-in' instabilities in microelectromechanical systems (MEMS) - a type of snap-through caused by electrostatic forces in which the motions are dominated by fluid damping. Using a lumped-parameter model, we show that the observed time delay near the pull-in transition is a type of critical slowing down - a so-called 'bottleneck' due to the 'ghost' of a saddle-node bifurcation. We obtain a scaling law describing this slowing down, and, in the process, unify a large range of experiments and simulations that exhibit delay phenomena during pull-in. We also investigate the pull-in dynamics of MEMS microbeams, extending the lumped-parameter approach to incorporate the details of the beam geometry. This provides a model system in which to understand snap-through of a continuous elastic structure due to external loading. We develop a perturbation method that systematically exploits the proximity to pull-in to reduce the governing equations to a simpler evolution equation, with a structure that highlights the saddle-node bifurcation. This allows us to analyse the bottleneck dynamics in detail, which we compare with previous experimental and numerical data. The remainder of the thesis is concerned with the dynamics of snap-through in macroscopic systems. In particular, we explore the extent to which dissipation is required to explain anomalously slow snap-through. Considering an elastic arch as an archetype of a snapping system, we use the perturbation method developed earlier to show that two bottleneck regimes are possible, depending delicately on the relative importance of external damping. In particular, we show that critical slowing down occurs even in the absence of damping, leading to a new scaling law for the snap-through time that is confirmed by elastica simulations and experiments. In many real systems material viscoelasticity is present to some degree. Finally, we examine how this influences the snap-through dynamics of a simple truss-like structure. We present a regime diagram that characterises when the timescale of snap-through is controlled by viscous, elastic or viscoelastic effects.

Subjects/Keywords: 510; Applied Mathematics; MEMS; Elasticity; Viscoelasticity; Bistability; Snap-through; Microbeam; Creep; Saddle-node ghost; Dynamics; Instability; Buckling; Electrostatic pull-in; Critical slowing down; Elastic arch

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APA (6^th Edition):

Gomez, M. (2018). Ghosts and bottlenecks in elastic snap-through. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:11ab7b19-ee4b-4cd6-ac9a-116363a4e4d7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.757801

Chicago Manual of Style (16^th Edition):

Gomez, Michael. “Ghosts and bottlenecks in elastic snap-through.” 2018. Doctoral Dissertation, University of Oxford. Accessed February 26, 2021. http://ora.ox.ac.uk/objects/uuid:11ab7b19-ee4b-4cd6-ac9a-116363a4e4d7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.757801.

MLA Handbook (7^th Edition):

Gomez, Michael. “Ghosts and bottlenecks in elastic snap-through.” 2018. Web. 26 Feb 2021.

Vancouver:

Gomez M. Ghosts and bottlenecks in elastic snap-through. [Internet] [Doctoral dissertation]. University of Oxford; 2018. [cited 2021 Feb 26]. Available from: http://ora.ox.ac.uk/objects/uuid:11ab7b19-ee4b-4cd6-ac9a-116363a4e4d7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.757801.

Council of Science Editors:

Gomez M. Ghosts and bottlenecks in elastic snap-through. [Doctoral Dissertation]. University of Oxford; 2018. Available from: http://ora.ox.ac.uk/objects/uuid:11ab7b19-ee4b-4cd6-ac9a-116363a4e4d7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.757801

3. Nsengiyumva, Patrick. INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS.

Degree: MS, 2014, University of New Hampshire

URL: https://scholars.unh.edu/thesis/984

► Radiation-induced single-event upsets (SEUs) pose a serious threat to the reliability of registers. The existing SEU analyses for static CMOS registers focus on the circuit-level… (more)

Subjects/Keywords: Critical Charge; Fault-Tolerance; Integrated Circuit Reliability; Radiation-Induced Effects; Selective Node Hardening (SNH); Single-Event Upset (SEU); Nuclear engineering; Computer engineering; Electrical engineering

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APA (6^th Edition):

Nsengiyumva, P. (2014). INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS. (Thesis). University of New Hampshire. Retrieved from https://scholars.unh.edu/thesis/984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nsengiyumva, Patrick. “INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS.” 2014. Thesis, University of New Hampshire. Accessed February 26, 2021. https://scholars.unh.edu/thesis/984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nsengiyumva, Patrick. “INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS.” 2014. Web. 26 Feb 2021.

Vancouver:

Nsengiyumva P. INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS. [Internet] [Thesis]. University of New Hampshire; 2014. [cited 2021 Feb 26]. Available from: https://scholars.unh.edu/thesis/984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nsengiyumva P. INVESTIGATING THE EFFECTS OF SINGLE-EVENT UPSETS IN STATIC AND DYNAMIC REGISTERS. [Thesis]. University of New Hampshire; 2014. Available from: https://scholars.unh.edu/thesis/984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

4. Edalatmanesh, Mahmood. Heuristics for the Critical Node Detection Problem in Large Complex Networks .

Degree: Department of Computer Science, 2013, Brock University

URL: http://hdl.handle.net/10464/4984

► Complex networks have recently attracted a significant amount of research attention due to their ability to model real world phenomena. One important problem often encountered… (more)

▼ Complex networks have recently attracted a significant amount of research attention due to their ability to model real world phenomena. One important problem often encountered is to limit diffusive processes spread over the network, for example mitigating pandemic disease or computer virus spread. A number of problem formulations have been proposed that aim to solve such problems based on desired network characteristics, such as maintaining the largest network component after node removal. The recently formulated critical node detection problem aims to remove a small subset of vertices from the network such that the residual network has minimum pairwise connectivity. Unfortunately, the problem is NP-hard and also the number of constraints is cubic in number of vertices, making very large scale problems impossible to solve with traditional mathematical programming techniques. Even many approximation algorithm strategies such as dynamic programming, evolutionary algorithms, etc. all are unusable for networks that contain thousands to millions of vertices. A computationally efficient and simple approach is required in such circumstances, but none currently exist. In this thesis, such an algorithm is proposed. The methodology is based on a depth-first search traversal of the network, and a specially designed ranking function that considers information local to each vertex. Due to the variety of network structures, a number of characteristics must be taken into consideration and combined into a single rank that measures the utility of removing each vertex. Since removing a vertex in sequential fashion impacts the network structure, an efficient post-processing algorithm is also proposed to quickly re-rank vertices. Experiments on a range of common complex network models with varying number of vertices are considered, in addition to real world networks. The proposed algorithm, DFSH, is shown to be highly competitive and often outperforms existing strategies such as Google PageRank for minimizing pairwise connectivity.

Subjects/Keywords: Complex networks; Heuristic; Critical node detection; Network model

…heuristics for the critical node detection problem (CNDP) with specific application to… …regular graphs [16]. However, many critical node detection problems have been defined… …and the diameter [2]). Although variants of the critical node detection… …Borgatti [17] proposed a new definition of critical node based on pairwise connectivity… …defined by Aruleslvan et al. [4] and it was called the critical node detection problem…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Edalatmanesh, M. (2013). Heuristics for the Critical Node Detection Problem in Large Complex Networks . (Thesis). Brock University. Retrieved from http://hdl.handle.net/10464/4984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Edalatmanesh, Mahmood. “Heuristics for the Critical Node Detection Problem in Large Complex Networks .” 2013. Thesis, Brock University. Accessed February 26, 2021. http://hdl.handle.net/10464/4984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Edalatmanesh, Mahmood. “Heuristics for the Critical Node Detection Problem in Large Complex Networks .” 2013. Web. 26 Feb 2021.

Vancouver:

Edalatmanesh M. Heuristics for the Critical Node Detection Problem in Large Complex Networks . [Internet] [Thesis]. Brock University; 2013. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/10464/4984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Edalatmanesh M. Heuristics for the Critical Node Detection Problem in Large Complex Networks . [Thesis]. Brock University; 2013. Available from: http://hdl.handle.net/10464/4984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

5. Hopkins, Michael. Critical Node Analysis for Water Distribution System Using Flow Distribution.

Degree: MS, Civil and Environmental Engineering, 2012, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/722 ; 10.15368/theses.2012.38

► The expansive nature of water distribution system makes them susceptible to threats such as natural disasters and man-made destructions. Vulnerability assessment research efforts have… (more)

Subjects/Keywords: Water distribution system; vulnerability assessment; critical node analysis; gravity model; flow distribution

…46 Table 9: Top Critical Nodes Predicted by Flow Distribution… …Commission on Critical Infrastructure as one of the eight key infrastructures (Qiao et at… …protect the weakest links and/ or high-risk areas. Vulnerability assessments are a critical… …The first objective was to develop method that accurately identified critical nodes and/or… …analyze every possible failure scenario. Critical nodes/pipes were defined as the nodes or pipes…

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APA (6^th Edition):

Hopkins, M. (2012). Critical Node Analysis for Water Distribution System Using Flow Distribution. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/722 ; 10.15368/theses.2012.38

Chicago Manual of Style (16^th Edition):

Hopkins, Michael. “Critical Node Analysis for Water Distribution System Using Flow Distribution.” 2012. Masters Thesis, Cal Poly. Accessed February 26, 2021. https://digitalcommons.calpoly.edu/theses/722 ; 10.15368/theses.2012.38.

MLA Handbook (7^th Edition):

Hopkins, Michael. “Critical Node Analysis for Water Distribution System Using Flow Distribution.” 2012. Web. 26 Feb 2021.

Vancouver:

Hopkins M. Critical Node Analysis for Water Distribution System Using Flow Distribution. [Internet] [Masters thesis]. Cal Poly; 2012. [cited 2021 Feb 26]. Available from: https://digitalcommons.calpoly.edu/theses/722 ; 10.15368/theses.2012.38.

Council of Science Editors:

Hopkins M. Critical Node Analysis for Water Distribution System Using Flow Distribution. [Masters Thesis]. Cal Poly; 2012. Available from: https://digitalcommons.calpoly.edu/theses/722 ; 10.15368/theses.2012.38

University of Florida

6. MISHRA,VIVEK. Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors.

Degree: PhD, Physics, 2011, University of Florida

URL: https://ufdc.ufl.edu/UFE0042738

► In this dissertation, I present the results of theoretical investigations of the effect of fluctuations Advisors/Committee Members: Hirschfeld, Peter J (committee chair), (more)

Subjects/Keywords: Critical temperature; Doping; Electrons; Fermi surfaces; Impurities; Inhomogeneity; Low temperature; Magnetic fields; Superconductors; Thermal conductivity; DISORDERED – FERMI – IRON – MODELS – NODE – SUPERCONDUCTING – SUPERFLUID – THERMAL – UNCONVENTIONAL – UNDERDOPED

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APA (6^th Edition):

MISHRA,VIVEK. (2011). Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0042738

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

MISHRA,VIVEK. “Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors.” 2011. Doctoral Dissertation, University of Florida. Accessed February 26, 2021. https://ufdc.ufl.edu/UFE0042738.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

MISHRA,VIVEK. “Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors.” 2011. Web. 26 Feb 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

MISHRA,VIVEK. Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors. [Internet] [Doctoral dissertation]. University of Florida; 2011. [cited 2021 Feb 26]. Available from: https://ufdc.ufl.edu/UFE0042738.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

MISHRA,VIVEK. Fluctuation, Disorder and Inhomogeneity in Unconventional Superconductors. [Doctoral Dissertation]. University of Florida; 2011. Available from: https://ufdc.ufl.edu/UFE0042738

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Queensland University of Technology

7. Koschade, Stuart Andrew. The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context.

Degree: 2007, Queensland University of Technology

URL: https://eprints.qut.edu.au/16591/

► The rise of the 21st Century Islamic extremist movement, which was mobilised by the al-Qaeda attacks of and responses to September 11, 2001, heralds a… (more)

▼ The rise of the 21st Century Islamic extremist movement, which was mobilised by the al-Qaeda attacks of and responses to September 11, 2001, heralds a new period in the history of terrorism. The increased frequency and intensity of this type of terrorism affects every nation in the world, not least Australia. Rising to meet the challenges posed by terrorism is the field of terrorism studies, the field which aims at understanding, explaining, and countering terrorism. Despite the importance of the field, it has been beleaguered with criticisms since its inception as a response to the rise of international terrorism. These criticisms specifically aim at the field's lack of objectivity, abstraction, levels of research, and levels of analysis. These criticisms were the impetus behind the adoption of the methodology of this thesis, which offers the distinct ability to understand, explain, and forecast the way in which terrorists interact within covert cells. Through social network analysis, this thesis examines four terrorist cells that have operated in or against Australia. These cells are from the groups Hrvatsko Revolucionarno Bratstvo (Croatian Revolutionary Brotherhood), Aum Shinrikyo (Supreme Truth), Lashkar-e-Taiba (Army of the Pure), and Jemaah Islamiyah (Islamic Community) and operated between 1963 and 2003. Essentially, this methodology attempts to discover, map, and analyse the interaction within the cells during the covert stage of their respective operations. Following this, the results are analysed through the traditional social network analysis frameworks to discover the internal dynamics of the cell and identify the critical nodes (leaders) within the cells. Destabilisation techniques are subsequently employed, targeting these critical nodes to establish the most effective disruption techniques from a counter-terrorism point of view. The major findings of this thesis are: (1) that cells with a focus on efficiency rather than covertness were more successful in completing their objectives (contrary to popular belief); and (2) betweenness centrality (control over the flow of communication) is a critical factor in identifying leaders within terrorist cells. The analysis also offered significant insight into how a Jemaah Islamiyah cell might operate effectively in Australia, as well as the importance of local contacts to terrorist operations and the significance of international counter-terrorism cooperation and coordination.

Subjects/Keywords: terrorism; terrorist cells; terrorism studies; social network analysis; Croatian Revolutionary Brotherhood; Ustashi; Ustasha; Aum Shinrikyo; Lashkar-e-Taiba; Jemaah Islamiyah; history of terrorism; Australia; destabilisation techniques; betweenness; critical node; counter-terrorism; Willie Brigitte; Faheem Khalid Lodhi; Shoko Asahara; Imam Samudra; Muklas; Bali bombing; Islamic extremism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Koschade, S. A. (2007). The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/16591/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Koschade, Stuart Andrew. “The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context.” 2007. Thesis, Queensland University of Technology. Accessed February 26, 2021. https://eprints.qut.edu.au/16591/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Koschade, Stuart Andrew. “The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context.” 2007. Web. 26 Feb 2021.

Vancouver:

Koschade SA. The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context. [Internet] [Thesis]. Queensland University of Technology; 2007. [cited 2021 Feb 26]. Available from: https://eprints.qut.edu.au/16591/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Koschade SA. The internal dynamics of terrorist cells: a social network analysis of terrorist cells in an Australian context. [Thesis]. Queensland University of Technology; 2007. Available from: https://eprints.qut.edu.au/16591/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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