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Topic: Complex system

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Systems thinking

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Management

	The Complex System: Sales Lead Management, Software Automation, Business Strategy & Personal Methodology
		This quarter is all about listening to our clients; brining on a customer evangelist is part of that strategy.
		Leads360 currently provides one of the key aspects to this system, the piece that insures loan agents convert leads into loans; but that’s just one part.
		It’s the system that is the solution, and I believe Leads360 is the platform to delivery that system.
	www.thecomplexsystem.com (2508 words)

	Current Issue
		This paper deals with the advantages of so-called hybrid systems, that is, systems consisting of two or more different models.
		The method is currently being used in a number of applications, including a study of complex thermal/mechanical phenomena at the sliding contacts between rubbing surfaces.
		An approach is offered using shape grammar to visually depict the desired conditional rules of a behavior or system architecture (a form-function) under investigation, followed by a transcription of these rules as patterns into CA.
	www.complex-systems.com /current.html (758 words)

	Complex system
		Because they are nonlinear, complex systems are more than the sum of their parts because a linear system is subject to the principle of superposition, and hence is literally the sum of its parts, while a nonlinear system is not.
		In dynamical systems terminology, such a qualitative change is known as a bifurcation and non-linearity is required for a system to exhibit it.
		Complex systems is therefore often used as a broad term encompassing a research approach to problems in many diverse disciplines including neuroscience, meteorology, physics, computer science, artificial life, evolutionary computation, economics, earthquake prediction, heart cell synchronisation, immune systems, reaction-diffusion systems, molecular biology, epilepsy and enquiries into the nature of living cells themselves.
	www.brainyencyclopedia.com /encyclopedia/c/co/complex_system.html (1341 words)

	[No title] (Site not responding. Last check: )
		What distinguishes a complex system from a merely complicated one is that some behaviors and patterns emerge in complex systems as a result of the patterns of relationship between the elements.
		Complex systems are open systems - that is, energy and information are constantly being imported and exported across system boundaries.
		The history of a complex system is important and cannot be ignored.
	wikiwhat.com /encyclopedia/c/co/complex_system.html (581 words)

	Complex Systems, Northwestern Institute on Complex Systems (NICO), Northwestern University
		Complex systems can be identified by what they do - display organization without a central organizing principle (emergence) and also by how they may or may not be analyzed - decomposing the system and analyzing subparts does not necessarily give a clue as to the behavior of the whole.
		A complex system is a system with a large number of elements, building blocks or agents, capable of interacting with each other and with their environment.
		Complex systems are systems where knowledge of the elementary building blocks - a termite, a neuron - does not even give a glimpse of the behavior of the global system itself; i.e.
	www.northwestern.edu /nico/complex_systems/index.html (1062 words)

	complex system \| TutorGig.co.uk Encyclopedia (Site not responding. Last check: )
		Such a system may be discrete (such as a cellular automata system or set of difference equations), or it may be continuous as in a system of differential equations.
		Because they are nonlinear, complex systems are more than the sum of their parts because a linear system is subject to the principle of superposition, and hence is literally the sum of its parts, while a nonlinear system is not.
		Complex systems is therefore often used as a broad term encompassing a research approach to problems in many diverse discplines including neuroscience, meteorology, physics, computer science, artificial life, evolutionary computation, economics, earth quake prediction, heart cell synchronisation, immune systems, reaction-diffusion systems, epilepsy and enquiries into the nature of living cells themselves.
	www.tutorgig.co.uk /ed/complex_system (1482 words)

	University of Michigan, Center for the Study of Complex Systems
		In a complex systems model, one usually makes assumptions about the characteristics of and interactions between the individual components or "agents" of the system and analyzes the model to understand what properties and activities of the total system emerge from these assumptions.
		Complex systems theory shows that these strong assumptions can be relaxed with the result being a richer, more diverse and dynamic set of theories.
		Interdisciplinary Approach: an important aspect of the complex systems approach is the recognition that many different kinds of systems include self-regulation, feedback or adaptation in their dynamics and thus may have a common underlying structure despite their apparent differences.
	www.cscs.umich.edu /about/complexity.html (530 words)

	[No title]
		The first challenge is to define what a system is. A system is an assembly of elements hooked together to produce a whole in which the attributes of the elements contribute to a behavior of the whole.
		One of the simplest adaptive systems is a flock of birds.
		To review, adaptive systems are constituted of agents that are connected to their neighbors and have a degree of freedom in responding to changes, but must respond within simple rules.
	www.beyondintractability.org /m/complex_adaptive_systems.jsp (2325 words)

	ISCID - Complex Systems
		Complex systems research involves investigating the origin of systems with multiple interacting parts whose collective behavior cannot be simply inferred from the behavior of the individual components.
		Research in complex systems concerns the nature and consequences of interactions and non-linearities in systems of many objects.
		Complex Systems was founded by Stephen Wolfram in 1987 to provide a publication forum for the new field of complex systems research.
	www.iscid.org /complex-systems.php (309 words)

	Assurance Activities for Complex Electronics Requirements
		As with the system requirements, the level of fidelity must be sufficient to allow derivation of the complex electronics requirements to commence.
		In less complicated systems, the requirements for the device may be included in a higher-level document (such as for a circuit board or electronic sub-system).
		The effects of abnormalities in the complex electronics on other components in the system, and on the system as a whole are the result of the analysis.
	www.hq.nasa.gov /office/codeq/software/ComplexElectronics/p_requirements.htm (5770 words)

	Complex Systems Modeling
		A complex system is any system featuring a large number of interacting components (agents, processes, etc.) whose aggregate activity is nonlinear (not derivable from the summations of the activity of individual components) and typically exhibits hierarchical self-organization under selective pressures.
		Examples of these systems are gene networks that direct developmental processes, immune networks that preserve the identity of organisms, social insect colonies, neural networks in the brain that produce intelligence and consciousness, ecological networks, social networks comprised of transportation, utilities, and telecommunication systems, as well as economies.
		The Complex Systems Modeling Research Focus Area at the Modeling, Algorithms, and Informatics Group (CCS-3) is concerned with basic and applied research on simulations and analysis of complex systems, as well as development of applications to understand and control such systems.
	informatics.indiana.edu /rocha/complex/csm.html (1689 words)

	Rainwater Harvesting: Complex Systems (Site not responding. Last check: )
		To reduce the cost of a complex system, you can (1) build a smaller storage container, harvesting less than the total irrigation water your landscape needs; (2) limit landscape area or reduce plant densities, lessening water demand; or (3) replace high-water-use plants with medium- or low-water-use ones, also reducing the amount of irrigation water needed.
		Complex rainwater harvesting systems include catchments, conveyance systems (connecting catchments to storage containers), storage, and distribution systems (directing water where it is needed).
		Roof catchment systems use canals, from which water flows by gravity into storage containers, or gutters and downspouts, which should be sized to collect as much rainfall as possible.
	rainwaterharvesting.tamu.edu /complex.html (1990 words)

	The Individualist: Complex Systems
		They are also united theoretically, because all these systems may, in principle, be modelled with varying degrees of success by a certain kind of mathematics.
		The term complex system formally refers to a system of many parts which are coupled in a nonlinear fashion.
		The unicist approach to complex systems implies the research and discovery of the ontological structure that describes the drivers of their evolution.
	www.dadamo.com /wiki/wiki.pl/Complex_Systems (1186 words)

	What are Complex Adaptive Systems?
		A theory that maintains that the universe is full of systems, weather systems, immune systems, social systems etc and that these systems are complex and constantly adapting to their environment.
		A period of flux occurs in all the populations in the system until a new balance is established.
		Most things we take for granted are complex adaptive systems, and the agents in every system exist and behave in total ignorance of the concept but that does not impede their contribution to the system.
	www.trojanmice.com /articles/complexadaptivesystems.htm (1283 words)

	Amazon.com: Dynamics of Complex Systems (Studies in Nonlinearity): Books: Yaneer Bar-Yam (Site not responding. Last check: )
		The concepts of emergence and complexity are fundamental to a study of complex systems, the author argues and early on in the book he clears up some of the confusions behind the use of these terms in the scientific literature.
		A `complex system' is one which is constructed from many components and whose behavior cannot be determined from the behavior of these components, i.e.
		The author calculates the complexity profile of the ideal gas and shows that the complexity of a microstate for this case is simply the entropy, but as the number of microstates with a given region increases, the complexity approaches zero.
	www.amazon.com /Dynamics-Complex-Systems-Studies-Nonlinearity/dp/0201557487 (2574 words)

	Complex Adaptive Systems - Webs of Delight
		This is the era of the Complex Adaptive System, a 21st Century metaphor relating innovation, cybernetics and complexity, within a new organic cosmos filled with living machines and emergent organization.
		This is the essence of distributed systems, each task responds to the local environment in real time, the interactions between the system and environment allow an emergent solution to arise.
		Such systems are well placed to explore new niches, to search their fitness landscape, changing their composition to fit the changing patterns they encounter.
	www.calresco.org /lucas/cas.htm (1525 words)

	Complex Systems
		In many cases, it is not easy to recognize which components are in series and which are in parallel in a complex system.
		The reliability of the system is simply the probability of the union of all mutually exclusive events that yield a system success.
		Since system success involves having at least one path available from one end of the RBD to the other, as long as at least one path from the beginning to the end of the path is available, then the system has not failed.
	www.weibull.com /SystemRelWeb/complex_systems.htm (839 words)

	Self-Organizing Systems FAQ for Usenet newsgroup comp.theory.self-org-sys
		These positions exist in the basins of attraction of the system and are inherently unstable, putting the system under stress of some sort, and causing it to move along a trajectory to a new attractor, which forms the self-organized state.
		Systems that use energy flow to maintain their form are said to be dissipative systems, these would include atmospheric vortices, living systems and similar.
		Systems that are able to change their number of connections (by mutation) are found to move from the chaotic (K high) or static (K low) regions spontaneously to that of the phase transition and stability - the self-organizing criticality.
	www.calresco.org /sos/sosfaq.htm (8398 words)

	Anecdote: Intention in a complex system
		Over an extended time, it is impossible to predict the outcome of, for example, the evolution of a species—because the direction of the natural system results from a complex co-evolution among the agents and their environment.
		When applying the Cynefin framework to organisational issues, any issue that is defined as ‘complex’ should at least be heading in a direction that is not in conflict with the purpose of the business.
		Because patterns are indiscernible, it is impossible to monitor and intervene as we would in the complex domain.
	www.anecdote.com.au /archives/2004/12/intention_in_a.html (575 words)

	RAND \| Reports \| Subjective Transfer Function Approach to Complex System Analysis
		The subjective transfer function (STF) approach, a new procedure for analyzing complex systems that involve numerous cause and effect relationships among the system components, is described.
		A tactical air command and control and force employment system is used to illustrate measurement problems found with other procedures commonly used in complex system analyses and their resolutions in the STF approach.
		In the STF approach, system "experts" are involved in defining the complex system components and constructing their network of cause and effect relationships.
	www.rand.org /pubs/reports/R2719 (393 words)

	Anatomy of a Complex Realtime System
		As the systems get complex they get harder and harder to develop as it needs a completely different mindset and tools to develop complex systems.
		Complex real-time systems would be a sea of state machine objects interacting with each other.
		As man made systems increase in complexity, the systems will need to be capable of recovering from all kinds of software and hardware failure conditions.
	www.eventhelix.com /RealtimeMantra/AnatomyOfAComplexSystem.htm (1047 words)

	The Study of Complex Systems
		Usually, in order to work with expressions and equations that are tractable by mathematical analysis, microeconomic theorists assume that all consumers are identical and never change their preferences or characteristics.
		Frontier Between Simplicity and Complexity: Because of their simplifying assumptions, classical economics theorists can often use mathematical analysis to derive the basic properties of the system they are studying.
		In addition to developing deeper understandings of specific systems, such interdisciplinary approaches should help elucidate the general structure and behavior of complex systems, and move us toward a deeper appreciation of the general nature of such systems.
	www.cscs.umich.edu /old/complexity.html (599 words)

	Is the Complement System Irreducibly Complex?
		The innate immune system is found in all multicellular organisms while specific (or adaptive) immunity is found only in vertebrates, with the exception of the agnathans, or jawless fish.
		The adaptive immune system, however, develops its antigen receptor repertoire by somatic mutations and many of the determinants recognized by these antigen receptors are idiosyncratic (usually non-essential, and therefore mutable) to a particular microbe.
		The occurrence of simpler systems in phylogenetically older organisms suggests an evolutionary pathway and the occurrence of numerous homologies between the genes suggests a mechanism for its evolution.
	www.talkorigins.org /faqs/behe/icsic.html (2897 words)

	MITRE - Our Work - Technical Papers - 2004 Technical Papers - Engineering a Complex System: A Study of the AOC
		Drawn from principles of complex adaptive systems, the augmentations to traditional systems engineering, known as Complex Systems Engineering, seeks to mimic the forces which drive evolution and guide the results.
		Large, intricate, complex systems all seem to share this characteristic and cause similar frustrations among those charged with their engineering.
		New systems and alterations to the "baseline" have occurred almost unabated; all for good and valid reasons from the point of view of the warfighters.
	www.mitre.org /work/tech_papers/tech_papers_04/04_0527/index.html (509 words)

	What is a Complex System
		In short, the psyche as, defined by Jung, is a complex system.
		Dissipative systems are those which are able to maintain identity only because they are open to flows of energy, matter, or information from their environments (Prigogine and Stengers, 1984).
		By assuming the psyche is a complex dynamic system, as well as a dissipative system, we can look at it through the lens of modern chaos theory.
	www.schuelers.com /ChaosPsyche/part_1_2.htm (670 words)

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