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	Binary Decision Diagrams for Fault Trees
		A binary decision diagram (BDD) may be automatically constructed from the fault and event tree diagrams entered into the FaultTree+ computer program.
		The binary decision diagram is constructed by applying a form of Shannon’s decomposition.
		The benefit of applying the BDD methodology rather than applying traditional kinetic tree methods is that many fault and event trees may be analysed exactly rather than using approximate upper bound methods.
	www.isograph.com /bdd.htm (133 words)

	Binary decision diagram - Wikipedia, the free encyclopedia
		A binary decision diagram (BDD) is a data structure that is used to represent a Boolean function.
		Each decision node is labeled by a Boolean variable and has two child nodes called low child and high child.
		Binary decision diagrams (BDD) were introduced by Lee (Lee 1959), and further studied and made known by Akers (Akers 1978).
	en.wikipedia.org /wiki/Binary_decision_diagram (915 words)

	Decision
		A binary decision diagram (BDD) is a graph whe...
		Decision theory Decision theory is an interdisciplinary area of study, related to and of interest to practitioners in ps...
		The Valley of Decision The Valley of Decision is a Jessica Tandy.
	www.brainyencyclopedia.com /topics/decision.html (279 words)

	United States Patent Application: 0040093570 (Site not responding. Last check: 2007-10-22)
		The method of claim 9, further comprising: translating the first set of states into a binary decision diagram (BDD) language protocol; and correlating the BDD language protocol to a conjunctive normal form (CNF) formula, the CNF formula reflecting the first set of states from which the second set of states is generated.
		In partitioning, the BDD for some function F, a decomposed BDD representation (i.e., a BDD which is not in terms of input variables but in terms of some pseudo-input variables that are created in the process of building BDDs for the given target function F) is considered.
		BDD element 40 serves as the foundation or core protocol on which POBDD and BMC operations are predicated.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040093541".PGNR.&OS=DN/20040093541&RS=DN/20040093541 (9043 words)

	Parallel Genetic Programming Induction of Binary Decision Diagrams
		A binary decision diagram (BDD) is a type of oriented graph used notably for the description of algorithms.
		A binary decision tree is a binary decision diagram that respects a third rule of assemblage: any entry point of a node is connected to only one preceding node.
		A renewal of interest on the minimalisation of binary decision diagrams is born with the appearance on the market of programmable circuits named FPGA (Field-Programmable Gate Array) [13] [10].
	sawww.epfl.ch /SIC/SA/publications/SCR95/7-95-24a.html (2603 words)

	Binary Decision Diagram (BDD) - for ITEM ToolKit
		The Binary Decision Diagram analysis technique (BDD) is now available in ITEM ToolKit, offers an exciting leap forward in fault and event tree analysis.
		After a few years working on the subject, one of the results produced by the group was a software tool dedicated to processing probabilistic formulae.
		In recent years Binary Decision Diagram's advancement has suffered from its lack of a sophisticated, graphical interface for the fault tree diagram construction.
	www.itemuk.com /bdd.html (282 words)

	Newcastle workshops (Site not responding. Last check: 2007-10-22)
		The workshop will show how Binary Decision Diagrams can be used to evaluate system failure mode probabilities and frequencies where the failure logic is expressed in the form of a fault tree.
		The BDD is an efficient method, which does not require the evaluation of minimal cut sets as an intermediate stage for system quantification.
		The accuracy of the BDD method, where the system failure probability and frequency can be calculated without the need to use approximations, is also an important characteristic.
	www.enbis.org /newcastleconference/interworkshops.html (1320 words)

	Binary decision diagram (Site not responding. Last check: 2007-10-22)
		Note: BDD can also mean body dysmorphic disorder.
		Randy Bryant is accredited with the discovery of the Binary Decision Diagram with his paper “Graph-based Algorithms for Boolean Function Manipulation” published in 1986.
		H. Andersen "An Introduction to Binary Decision Diagrams," Lecture Notes, http://www.itu.dk/people/hra/bdd97-abstract.html, October 1997.
	www.sciencedaily.com /encyclopedia/binary_decision_diagram (328 words)

	Binary Decision Diagram with Minimum Expected Path Length - Liu, Wang, Hwang, Liu (ResearchIndex)
		A BDD is a generic data structure which is widely used in several fields.
		A BDD representation enables us to evaluate a Boolean function: Simply traverse the BDD from the root node to the terminal node and retrieve the value in the terminal node.
		For a BDD with minimum expected path length will be also minimized the evaluation...
	citeseer.ist.psu.edu /569343.html (386 words)

	JavaBDD - Java Binary Decision Diagram library
		Binary decision diagrams are widely used in model checking, formal verification, optimizing circuit diagrams, etc. For an excellent overview of the BDD data structure, see this set of lecture notes by Henrik Reif Andersen.
		The JavaBDD API is based on that of the popular BuDDy package, a BDD package written in C by J?rn Lind-Nielsen.
		JavaBDD is designed for high performance applications, so it also exposes many of the lower level options of the BDD library, like cache sizes and advanced variable reordering.
	javabdd.sourceforge.net (178 words)

	PMo21 (Site not responding. Last check: 2007-10-22)
		In this study, we have investigated the bit-serial SFQ adder architecture based on the binary decision diagram (BDD) to increase the input data frequency.
		The BDD SFQ circuit is one of the data-driven self-timed (DDST) logic.
		Our first adder design uses a simple one-bit BDD adder with a carry feedback loop, whose input data frequency is limited by the propagation delay in the carry feedback loop.
	www.tip.csiro.au /ISEC2003/abstracts/PMo21.htm (226 words)

	Exact BDD Minimization (Site not responding. Last check: 2007-10-22)
		Specifically, given an incompletely specified function g and a fixed ordering of the variables, we propose an exact algorithm for selecting f such that f is a cover for g and the binary decision diagram for f is of minimum size.
		In particular, we find the minimum-sized binary decision diagram compatible with the specification by solving a problem that is very similar to the problem of reducing incompletely specified finite state machines.
		We have developed a prototype implementation of the algorithm based on binary decision diagrams, using the implicit techniques developed by T.
	embedded.eecs.berkeley.edu /Respep/Research/asves/logicsynthesis/imagem.html (333 words)

	ipedia.com: Boolean satisfiability problem Article (Site not responding. Last check: 2007-10-22)
		To solve this instance of the decision problem we must determine whether there is a truth value (TRUE or FALSE) we can assign to each of the literals (x1 through x4) such that the entire expression is TRUE.
		Particularly in hardware design and verification applications, satisfiability and other logical properties of a given propositional formula are often decided based on a representation of the formula as a binary decision diagram (BDD).
		Many other decision problems, such as graph colouring problems, planning problems, and scheduling problems can be rather easily encoded into SAT.
	www.ipedia.com /boolean_satisfiability_problem.html (777 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		In recent years, binary decision diagram (BDD) has emerged as the choice representation for Boolean functions in the CAD community because of its compactness and canonicity, as well as the availability of efficient BDD manipulation algorithms.
		Background and Related Work 3.1 Formal Definitions 3.1.1 Formal Definition of Binary Decision Diagram A BDD [BRY86] is a rooted DAG, G(V,E).
		Each BDD has one or two terminal vertice(s) with out-degree of zero and multiple non-terminal vertices, each with out-degree of exactly two.
	embedded.eecs.berkeley.edu /Alumni/teh/research/thesis/Thesis_sidney.doc (693 words)

	[No title]
		In this section we briefly discuss the Algebraic Decision Diagrams (ADD's) and why they are ideal choices for this project.
		ADD's extend BDD's by allowing values from an arbitrary finite domain to be associated with the terminal nodes [1].
		This representation is actually a tree, a decision tree in the usual sense.
	www.csl.sri.com /users/tiwari/project-635.html (3328 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		Using Binary Expression Diagrams (BEDs) we improve over existing lower bounds because the implication rules are implemented exactly.
		At the end of each phase either we identify a segment (set of consecutive lines) that is unsensitizable or a sensitizable PDF and a pattern for the PDF which is extracted from a function stored in a BED.
		(The BED has to be transormed to a traditional Binary Decision Diagram or a conjuctive normal form formula in order to obtain the pattern effectively).
	www.engr.siu.edu /grad2/spyros/rathish (532 words)

	PREMIUM ONLINE TECHNOLOGIES GLOSSARIES, DICTIONARIES, TERMINOLOGY, ACRONYMS + DEFINITIONS
		Binary Decision Diagram - Is also often refered to as a Rooted Directed Acyclic Graph.
		By reducing a decision tree through eliminating all equal subexpressions we are left with a set of expressions that when represented as a DAG become a Binary Decision Diagram.
		BSP - Is Binary Space Partitioning or a Binary Space Partition Tree.
	www.oasismanagement.com /frames/TECHNOLOGY/GLOSSARY/b.html?TECHNOLOGY/GLOSSARY/b.html (836 words)

	Information and Computation Bibliography (Site not responding. Last check: 2007-10-22)
		The state of the art data structure is the ordered binary decision diagram (OBDD), which results from general binary decision diagrams (BDDs), also called branching programs, by ordering restrictions.
		Testability of circuits derived from functional decision diagrams.
		Edge-valued binary decision diagrams for multi-level hierarchical verification.
	theory.lcs.mit.edu /~iandc/References/beckerdw1995:185.html (728 words)

	Automated theorem proving (Site not responding. Last check: 2007-10-22)
		Automated theorem proving (also often called automated reasoning) is the proving of mathematical theorems by a computer program.
		It differs from automated proof verification: the proof verification problem is primitive recursive and has a very fast decision procedure; the set of theorems on the other hand, is undecidable -- at best only recursively enumerable.
		In reality, there is no general-purpose system that can fully automatically prove "interesting" theorems, and most theorem proving systems can be used in a variety of ways with different amounts of automation, so this distinction is often dropped and both sides of the continuum are called theorem proving.
	www.serebella.com /encyclopedia/article-Automated_theorem_proving.html (583 words)

	Binary Decision Diagrams (Site not responding. Last check: 2007-10-22)
		And the wife says to him, "You don't need to pray for guidance at every intersection!" Tacky though it was, however, it was kind of funny -- so I decided to put my own twist on it.
		For what it's worth, a binary decision diagram (BDD) is a data structure for representing binary functions.
		They have certain limited applications in theoretical computer science, and -- so I'm told -- in verifying the correctness of device drivers.
	www.cs.utah.edu /~draperg/cartoons/2005/path.html (112 words)

	Aralia - Binary Decision Diagram - for ITEM ToolKit (Site not responding. Last check: 2007-10-22)
		The new ARALIA© Binary Decision Diagram analysis technique (BDD) is now available in ITEM ToolKit, offers an exciting leap forward in fault and event tree analysis.
		In 1990, a number of companies (CEA, Dassault Aviation, EDF, ELF-EP, Renault, Schneider Electric, SGN, Technicatome) and laboratories (LaBRI, LADS) formed a group to explore the use of binary decision diagrams in the field of Operating Dependability and Safety.
		Since then, the application has continuously evolved to cater for the varied demands in qualitative and quantitative calculus of the members of the group.
	www.itemsoftware.f9.co.uk /aralia.html (271 words)

	Binary Decision Diagram Representations Of Firewall And Router Access Lists - Hazelhurst, Fatti, Henwood (ResearchIndex)
		explored the use of binary decision diagrams (BDDs) for representing access rule lists, and showed the potential of using BDDs for speeding...
		They have used ordered binary decision diagrams to analyze access lists.
		Binary Decision Diagram Representations of Firewall and Router Access Lists.
	citeseer.ist.psu.edu /39660.html (517 words)

	binary decision diagram - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "binary decision diagram" is defined.
		Binary Decision Diagram : Technology Terms and Acronyms [home, info]
		Phrases that include binary decision diagram: ordered binary decision diagram, reduced ordered binary decision diagram
	www.onelook.com /?w=binary+decision+diagram (89 words)

	info (Site not responding. Last check: 2007-10-22)
		On top of the baseline synthesis flow, we implemented two new ideas in our first software release, FBDD 1.0, as a first step towards our objective.
		FBDD is an acronym for folded binary decision diagram, the central data structure used in our logic synthesis system.
		The animated logo, a folding diagram, is taken from
	www.eecg.toronto.edu /~jzhu/releases/fbdd/info_web (486 words)

	Using Network of Workstations for Efficient Binary Decision Diagram Manipulation (Site not responding. Last check: 2007-10-22)
		In [26] we present algorithms for manipulation of very large Binary Decision Diagrams (BDDs) on a network of workstations (NOW).
		A NOW provides a collection of main memories and disks which can be used effectively to create and manipulate very large BDDs.
		BDDs are partitioned such that nodes for a set of consecutive variables are assigned to the same workstation.
	www-cad.eecs.berkeley.edu /~brayton/micro-final-1996/node17.html (148 words)

	QDD : A Quantum Computer Emulation Library
		QDD is unique in that the its emulation of quantum computing is based upon a Binary Decision Diagram (BDD) representation of the quantum state.
		The use of BDDs to model the underlying quantum state allows QDD to model relatively large quantum states and provides a relatively high degree of performance.
		Although the BDD representation used by QDD provides a relatively high degree of scalability and performance nearly linear in the size of the state representation, the size of the underlying representation is still exponential in the number of quantum bits used and therefore QDD still cannot be used to efficiently factor very large numbers.
	thegreves.com /david/QDD/qdd.html (894 words)

	Business Software Review : Article 'Binary decision diagram' (Site not responding. Last check: 2007-10-22)
		Most practical algorithms for optimizing large logic systems use algebraic manipulations or binary decision diagrams, and there are promising experiments with genetic algorithms and annealing optimizations.
		Engineers use many methods to minimize logic functions, in order to reduce the complexity and expense of digital machines.
		BDD can refer to: Binary decision diagram, a data structure in computer science.
	www.business-software-review.org /DisplayArticle484724.html (850 words)

	Lisa Bartlett - Staff profile
		An Ordering Heuristic To Develop The Binary Decision Diagram Based on Structural Importance.
		Choosing a Heuristic for the "Fault Tree to Binary Decision Diagram" Conversion, Using Neural Networks.
		Progression of the Binary Decision Diagram Conversion Methods.
	www.lboro.ac.uk /departments/tt/development/staff/bartlett.html (275 words)

	JavaBDD - High-Performance Java Binary Decision Diagram library
		It can also interface with two popular BDD libraries written in C via a JNI interface: BuDDy and CUDD.
		Added a 100% Java implementation of the BDD factory, so the native library is no longer necessary.
		Lecture notes by Henrik Reif Andersen: An Introduction to Binary Decision Diagrams.
	www.cs.toronto.edu /pub/shou/Research/javaBDD/javabdd_src_0.6/JavaBDD/JavaBDD.html (967 words)

	New Techniques for Boolean Verification (Site not responding. Last check: 2007-10-22)
		Approaches for achieving this are generally based on transforming the two functions to a canonical form, and then checking for equivalence.
		The most popular canonical form in use is the Reduced, Ordered, Binary Decision Diagram (ROBDD, commonly referred to as BDD).
		A new Boolean function representation scheme, the Indexed Binary Decision Diagram (IBDD), was proposed to provide a compact representation for funcitons whose OBDD representation is intractably large.
	www.cerc.utexas.edu /~jaa/verif/boolean-verif.html (523 words)

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