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ENGINEERING (1206 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 1001 - 1200 of 1205 Journals sorted alphabetically
Production     Open Access  
Production and Operations Management     Hybrid Journal   (Followers: 9)
Production Engineering     Hybrid Journal   (Followers: 3)
Production Planning & Control: The Management of Operations     Hybrid Journal   (Followers: 7)
Progress in Agricultural Engineering Sciences     Full-text available via subscription  
Progress in Computational Fluid Dynamics, An International Journal     Hybrid Journal   (Followers: 6)
Progress in Energy and Combustion Science     Full-text available via subscription   (Followers: 8)
Progress in Nanotechnology and Nanomaterials     Open Access   (Followers: 4)
Progress in Photovoltaics: Research & Applications     Hybrid Journal   (Followers: 7)
Progress in Polymer Science     Full-text available via subscription   (Followers: 32)
Propellants, Explosives, Pyrotechnics     Hybrid Journal   (Followers: 217)
Propulsion and Power Research     Open Access   (Followers: 13)
Purinergic Signalling     Hybrid Journal  
Quaderns d’Història de l’Enginyeria     Open Access  
Quality and Reliability Engineering International     Hybrid Journal   (Followers: 10)
Quality Engineering     Hybrid Journal   (Followers: 7)
Radiochimica Acta     Hybrid Journal   (Followers: 4)
Rapid Prototyping Journal     Hybrid Journal   (Followers: 3)
Rare Metals     Hybrid Journal  
Reactive and Functional Polymers     Hybrid Journal   (Followers: 5)
Recent Patents on Engineering     Full-text available via subscription   (Followers: 2)
Recent Patents on Nanotechnology     Full-text available via subscription   (Followers: 2)
Recherche Transports Sécurité     Hybrid Journal   (Followers: 1)
Redes de Ingeniería     Open Access  
Regional Maritime University Journal     Full-text available via subscription   (Followers: 1)
Regular and Chaotic Dynamics     Hybrid Journal  
Rem : Revista Escola de Minas     Open Access   (Followers: 1)
Remote Sensing     Open Access   (Followers: 12)
Remote Sensing Letters     Hybrid Journal   (Followers: 10)
Requirements Engineering     Hybrid Journal   (Followers: 3)
Research Ideas and Outcomes     Open Access  
Research in Engineering Design     Hybrid Journal   (Followers: 10)
Research Journal of Nanoscience and Nanotechnology     Open Access   (Followers: 2)
Research Works of Air Force Institute of Technology     Open Access   (Followers: 1)
Resonance     Hybrid Journal   (Followers: 16)
Review of Symbolic Logic     Full-text available via subscription   (Followers: 1)
Reviews in Advanced Sciences and Engineering     Partially Free   (Followers: 1)
Revista AIDIS de Ingeniería y Ciencias Ambientales. Investigación, desarrollo y práctica     Open Access  
Revista Brasileira de Engenharia Agrícola e Ambiental     Open Access   (Followers: 1)
Revista Ciencias e Ingeniería al Día     Open Access  
Revista Científica e-Locução     Open Access  
Revista CINTEX     Open Access  
Revista Cubana de Ingeniería     Open Access  
Revista de Engenharia da Universidade Católica de Petrópolis     Open Access  
Revista de Ingeniería     Open Access  
Revista de Ingenieria Sismica     Open Access  
Revista de Investigación, Desarrollo e Innovación     Open Access  
Revista EIA     Open Access   (Followers: 1)
Revista Facultad de Ingeniería     Open Access   (Followers: 1)
Revista Facultad de Ingenieria - Universidad de Tarapaca     Open Access  
Revista Facultad de Ingeniería Universidad de Antioquia     Open Access   (Followers: 1)
Revista Informador Técnico     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access  
Revista Logos Ciencia & Tecnología     Open Access  
Revue de Métallurgie     Full-text available via subscription  
Russian Engineering Research     Hybrid Journal  
Russian Journal of Non-Ferrous Metals     Hybrid Journal   (Followers: 25)
Russian Microelectronics     Hybrid Journal  
Sadhana     Open Access   (Followers: 4)
Safety Science     Hybrid Journal   (Followers: 15)
Scholedge International Journal of Multidisciplinary & Allied Studies     Open Access   (Followers: 2)
Science & Technique     Open Access  
Science and Engineering Ethics     Hybrid Journal   (Followers: 6)
Science and Technology     Open Access   (Followers: 2)
Science China Technological Sciences     Hybrid Journal  
Science in Context     Hybrid Journal   (Followers: 1)
Science Journal of Volgograd State University. Technology and innovations     Open Access  
Science Progress     Full-text available via subscription   (Followers: 3)
Scientia cum Industria     Open Access  
Scientific Journal of Control Engineering     Open Access   (Followers: 1)
Scientific Journal of Pure and Applied Sciences     Open Access  
Scientific Journal of Review     Open Access  
Sealing Technology     Full-text available via subscription   (Followers: 1)
Securitas Vialis     Hybrid Journal  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 15)
Semiconductors     Hybrid Journal  
Semiconductors and Semimetals     Full-text available via subscription  
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 1)
Sensor Letters     Full-text available via subscription   (Followers: 1)
Sensors     Open Access   (Followers: 9)
Separation and Purification Technology     Hybrid Journal   (Followers: 10)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Shock and Vibration     Hybrid Journal   (Followers: 6)
SIAM Journal on Applied Dynamical Systems     Full-text available via subscription   (Followers: 2)
SIAM Journal on Mathematical Analysis     Full-text available via subscription   (Followers: 3)
SIAM Journal on Matrix Analysis and Applications     Full-text available via subscription   (Followers: 1)
SIAM Journal on Numerical Analysis     Full-text available via subscription   (Followers: 4)
SIAM Journal on Optimization     Full-text available via subscription   (Followers: 6)
SIAM Review     Full-text available via subscription   (Followers: 5)
SILICON     Hybrid Journal  
Sistemas & Telemática     Open Access   (Followers: 1)
Sleep and Biological Rhythms     Hybrid Journal   (Followers: 3)
Small     Hybrid Journal   (Followers: 8)
Smart Grid     Open Access  
Soft Computing     Hybrid Journal   (Followers: 6)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 33)
Soil Dynamics and Earthquake Engineering     Hybrid Journal   (Followers: 7)
Soldagem & Inspeção     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 7)
SourceOCDE Developpement urbain, rural et regional     Full-text available via subscription  
SourceOCDE Energie     Full-text available via subscription  
SourceOECD Energy     Full-text available via subscription  
SourceOECD Science and Technology Statistics - SourceOCDE Base de donnees des sciences et de la technologie     Full-text available via subscription  
SourceOECD Transport     Full-text available via subscription   (Followers: 3)
SourceOECD Urban, Rural and Regional Development     Full-text available via subscription   (Followers: 1)
South African Computer Journal     Full-text available via subscription  
South African Journal of Agricultural Extension     Open Access   (Followers: 3)
South African Journal of Science     Open Access   (Followers: 3)
Sports Engineering     Hybrid Journal   (Followers: 2)
Stahlbau     Hybrid Journal   (Followers: 4)
Steel in Translation     Hybrid Journal  
Steel Research International     Hybrid Journal   (Followers: 28)
Stochastic Analysis and Applications     Hybrid Journal  
Stochastic Processes and their Applications     Hybrid Journal   (Followers: 4)
Stochastics and Dynamics     Hybrid Journal  
Strain     Hybrid Journal   (Followers: 1)
Strategic Planning for Energy and the Environment     Hybrid Journal   (Followers: 3)
Studies in Engineering and Technology     Open Access  
Studies in Interface Science     Full-text available via subscription   (Followers: 1)
Studies in Logic and Practical Reasoning     Full-text available via subscription  
Studies in Surface Science and Catalysis     Full-text available via subscription   (Followers: 1)
Superconductor Science and Technology     Hybrid Journal  
Surface Engineering     Hybrid Journal   (Followers: 3)
Surface Review and Letters     Hybrid Journal   (Followers: 1)
Surface Science Reports     Full-text available via subscription   (Followers: 14)
Survey Review     Hybrid Journal   (Followers: 6)
Surveying and Land Information Science     Full-text available via subscription   (Followers: 2)
Sustainability Science     Hybrid Journal   (Followers: 5)
Sustainability Science and Engineering     Full-text available via subscription   (Followers: 4)
Sustainable Management of Sediment Resources     Full-text available via subscription  
Swiss Journal of Geosciences     Hybrid Journal  
Symmetry     Open Access  
Synthesis Lectures on Algorithms and Software in Engineering     Full-text available via subscription  
Synthesis Lectures on Antennas     Full-text available via subscription   (Followers: 4)
Synthesis Lectures on Biomedical Engineering     Full-text available via subscription  
Synthesis Lectures on Computational Electromagnetics     Full-text available via subscription   (Followers: 3)
Synthesis Lectures on Energy and the Environment: Technology, Science, and Society     Full-text available via subscription   (Followers: 2)
Synthesis Lectures on Engineering     Full-text available via subscription  
Synthesis Lectures on Global Engineering     Full-text available via subscription  
Synthesis Lectures on Professionalism and Career Advancement for Scientists and Engineers     Full-text available via subscription  
Synthetic Metals     Hybrid Journal   (Followers: 4)
Systems Engineering     Hybrid Journal   (Followers: 6)
Systems Engineering Procedia     Open Access  
Systems Research Forum     Hybrid Journal  
Systems Science & Control Engineering     Open Access   (Followers: 3)
Techno.Com     Open Access  
Technological Engineering     Open Access  
Technologies     Open Access   (Followers: 1)
TECHNOLOGY     Hybrid Journal  
Technology and Innovation     Full-text available via subscription   (Followers: 3)
Technology in Society     Hybrid Journal   (Followers: 4)
Technometrics     Full-text available via subscription   (Followers: 6)
Tecnologia, Ciencia, Educacion     Open Access   (Followers: 1)
Tecnura     Open Access  
Telecommunications Policy     Hybrid Journal   (Followers: 8)
Terahertz Science and Technology, IEEE Transactions on     Hybrid Journal   (Followers: 1)
Textile Science and Technology     Full-text available via subscription   (Followers: 3)
The Journal of Computational Multiphase Flows     Full-text available via subscription  
The Journal of Supercomputing     Hybrid Journal   (Followers: 1)
The Scientific World Journal     Open Access  
Theoretical and Computational Fluid Dynamics     Hybrid Journal   (Followers: 9)
Theoretical Issues in Ergonomics Science     Hybrid Journal   (Followers: 2)
Thermal Engineering     Hybrid Journal   (Followers: 3)
Tikrit Journal of Engineering Science     Open Access  
tm - Technisches Messen     Hybrid Journal   (Followers: 1)
Topics in Catalysis     Hybrid Journal   (Followers: 1)
Traffic Injury Prevention     Hybrid Journal   (Followers: 41)
TRANSACTIONS of the VŠB - Technical University of Ostrava, Safety Engineering Series     Open Access   (Followers: 1)
Transactions of Tianjin University     Full-text available via subscription  
Transport and Telecommunication Journal     Open Access   (Followers: 3)
Transport World Africa     Full-text available via subscription   (Followers: 3)
Transportation Research Record : Journal of the Transportation Research Board     Full-text available via subscription   (Followers: 32)
Transportmetrica A : Transport Science     Hybrid Journal   (Followers: 5)
Trends in Applied Sciences Research     Open Access   (Followers: 1)
Tribology in Industry     Open Access   (Followers: 1)
Tribology International     Hybrid Journal   (Followers: 41)
Tribology Letters     Hybrid Journal   (Followers: 5)
Tribology Transactions     Hybrid Journal   (Followers: 33)
Tribotest     Hybrid Journal  
Tropical Science     Hybrid Journal   (Followers: 1)
Turkish Journal of Engineering and Environmental Sciences     Open Access  
Ultramicroscopy     Hybrid Journal   (Followers: 2)
Uludağ University Journal of The Faculty of Engineering     Open Access  
Universal Journal of Applied Science     Open Access  
Universal Journal of Engineering Science     Open Access   (Followers: 1)
Utilities Policy     Hybrid Journal   (Followers: 2)
Vacuum     Hybrid Journal   (Followers: 12)
Virtual and Physical Prototyping     Hybrid Journal   (Followers: 3)
Visualization in Engineering     Open Access  
Walailak Journal of Science and Technology     Open Access  
Waste and Biomass Valorization     Hybrid Journal  
Waste Management Series     Full-text available via subscription   (Followers: 2)
Waves in Random and Complex Media     Hybrid Journal  
Wear     Hybrid Journal   (Followers: 29)
Welding in the World     Hybrid Journal   (Followers: 2)
West African Journal of Industrial and Academic Research     Open Access   (Followers: 1)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 8)
World Journal of Engineering     Full-text available via subscription   (Followers: 3)
World Journal of Engineering and Technology     Open Access  

  First | 1 2 3 4 5 6 7 | Last

Journal Cover Journal of Applied Logic
  [SJR: 0.936]   [H-I: 19]   [0 followers]  Follow
   Full-text available via subscription Subscription journal
   ISSN (Print) 1570-8683
   Published by Elsevier Homepage  [2817 journals]
  • Intuitionistic common knowledge or belief
    • Abstract: Publication date: Available online 27 April 2016
      Source:Journal of Applied Logic
      Author(s): Gerhard Jäger, Michel Marti
      Starting off from the usual language of modal logic for multi-agent systems dealing with the agents' knowledge/belief and common knowledge/belief we define so-called epistemic Kripke structures for intuitionistic (common) knowledge/belief. Then we introduce corresponding deductive systems and show that they are sound and complete with respect to these semantics.

      PubDate: 2016-04-28T20:00:13Z
  • A cirquent calculus system with clustering and ranking
    • Abstract: Publication date: Available online 25 April 2016
      Source:Journal of Applied Logic
      Author(s): Wenyan Xu
      Cirquent calculus is a new proof-theoretic and semantic approach introduced by G.Japaridze for the needs of his theory of computability logic (CoL). The earlier article “From formulas to cirquents in computability logic” by Japaridze generalized formulas in CoL to circuit-style structures termed cirquents. It showed that, through cirquents with what are termed clustering and ranking, one can capture, refine and generalize independence-friendly (IF) logic. Specifically, the approach allows us to account for independence from propositional connectives in the same spirit as IF logic accounts for independence from quantifiers. Japaridze's treatment of IF logic, however, was purely semantical, and no deductive system was proposed. The present paper syntactically constructs a cirquent calculus system with clustering and ranking, sound and complete w.r.t. the propositional fragment of cirquent-based semantics. Such a system captures the propositional version of what is called extended IF logic, thus being an axiomatization of a nontrivial fragment of that logic.

      PubDate: 2016-04-25T19:36:18Z
  • Transformation of fractions into simple fractions in divisive meadows
    • Abstract: Publication date: Available online 2 March 2016
      Source:Journal of Applied Logic
      Author(s): J.A. Bergstra, C.A. Middelburg
      Meadows are alternatives for fields with a purely equational axiomatization. At the basis of meadows lies the decision to make the multiplicative inverse operation total by imposing that the multiplicative inverse of zero is zero. Divisive meadows are meadows with the multiplicative inverse operation replaced by a division operation. Viewing a fraction as a term over the signature of divisive meadows that is of the form p / q , we investigate which divisive meadows admit transformation of fractions into simple fractions, i.e. fractions without proper subterms that are fractions.

      PubDate: 2016-04-11T17:00:10Z
  • Editorial Board
    • Abstract: Publication date: March 2016
      Source:Journal of Applied Logic, Volume 14

      PubDate: 2016-04-11T17:00:10Z
  • Revisiting da Costa logic
    • Abstract: Publication date: Available online 21 February 2016
      Source:Journal of Applied Logic
      Author(s): Mauricio Osorio Galindo, Verónica Borja Macías, José Ramón Enrique Arrazola Ramírez
      In [25] Priest developed the da Costa logic (daC); this is a paraconsistent logic which is also a co-intuitionistic logic that contains the logic C ω . Due to its interesting properties it has been studied by Castiglioni, Ertola and Ferguson, and some remarkable results about it and its extensions are shown in [8,11]. In the present article we continue the study of daC, we prove that a restricted Hilbert system for daC, named DC, satisfies certain properties that help us show that this logic is not a maximal paraconsistent system. We also study an extension of daC called P H 1 and we give different characterizations of it. Finally we compare daC and P H 1 with several paraconsistent logics.

      PubDate: 2016-04-11T17:00:10Z
  • Behavioral equivalence of hidden k-logics: An abstract algebraic approach
    • Abstract: Publication date: Available online 4 March 2016
      Source:Journal of Applied Logic
      Author(s): Sergey Babenyshev, Manuel A. Martins
      This work advances a research agenda which has as its main aim the application of Algebraic Logic (AAL) methods and tools to the specification and verification of software systems. It uses a generalization of the notion of an abstract deductive system to handle multi-sorted deductive systems which differentiate visible and hidden sorts. Two main results of the paper are obtained by generalizing properties of the Leibniz congruence — the central notion in AAL. In this paper we discuss a question we posed in [1] about the relationship between the behavioral equivalences of equivalent hidden logics. We also present a necessary and sufficient intrinsic condition for two hidden logics to be equivalent.

      PubDate: 2016-04-11T17:00:10Z
  • Lexicographic pseudo MV-algebras
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 3
      Author(s): Anatolij Dvurečenskij
      A lexicographic pseudo MV-algebra is an algebra that is isomorphic to an interval in the lexicographic product of a unital linearly ordered group with an arbitrary ℓ-group. We present conditions when a pseudo MV-algebra is lexicographic. We show that a key condition is the existence of a lexicographic ideal, or equivalently, a case when the algebra can be split into comparable slices indexed by elements of the interval [ 0 , u ] of some unital linearly ordered group ( H , u ) . Finally, we show that fixing ( H , u ) , the category of ( H , u ) -lexicographic pseudo MV-algebras is categorically equivalent to the category of ℓ-groups.

      PubDate: 2016-04-11T17:00:10Z
  • A labeled argumentation framework
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Maximiliano C.D. Budán, Mauro Gómez Lucero, Ignacio Viglizzo, Guillermo R. Simari
      To increase the expressivity of an argumentation formalism, we propose adding meta-level information to the arguments in the form of labels representing quantifiable data such as reliability degree, strength measure, skill, time availability, or any other feature about arguments. The extra information attached to an argument is then used in the acceptability determination process. We present a Labeled Argumentation Framework (LAF), combining the knowledge representation capabilities provided by the Argument Interchange Format (AIF) with an Algebra of Argumentation Labels, enabling us to handle the labels associated with the arguments. These labels are propagated through an argumentative graph according to the relations of support, conflict, and aggregation between arguments. Through this process we obtain final labels attached to the arguments that are useful to determine their acceptability.

      PubDate: 2016-04-11T17:00:10Z
  • An approach to abstract argumentation with recursive attack and support
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Andrea Cohen, Sebastian Gottifredi, Alejandro J. García, Guillermo R. Simari
      This work introduces the Attack–Support Argumentation Framework (ASAF), an approach to abstract argumentation that allows for the representation and combination of attack and support relations. This framework extends the Argumen-tation Framework with Recursive Attacks (AFRA) in two ways. Firstly, it adds a support relation enabling to express support for arguments; this support can also be given to attacks, and to the support relation itself. Secondly, it extends AFRA's attack relation by allowing attacks to the aforementioned support relation. Moreover, since the support relation of the ASAF has a necessity interpretation, the ASAF also extends the Argumentation Framework with Necessities (AFN). Thus, the ASAF provides a unified framework for representing attack and support for arguments, as well as attack and support for the attack and support relations at any level.

      PubDate: 2016-04-11T17:00:10Z
  • Similarity-based relaxed instance queries
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Andreas Ecke, Rafael Peñaloza, Anni-Yasmin Turhan
      In Description Logics (DL) knowledge bases (KBs), information is typically captured by clear-cut concepts. For many practical applications querying the KB by crisp concepts is too restrictive; a user might be willing to lose some precision in the query, in exchange of a larger selection of answers. Similarity measures can offer a controlled way of gradually relaxing a query concept within a user-specified limit. In this paper we formalize the task of instance query answering for DL KBs using concepts relaxed by concept similarity measures (CSMs). We investigate computation algorithms for this task in the DL EL , their complexity and properties for the CSMs employed regarding whether unfoldable or general TBoxes are used. For the case of general TBoxes we define a family of CSMs that take the full TBox information into account, when assessing the similarity of concepts.

      PubDate: 2016-04-11T17:00:10Z
  • A non-commutative generalization of Łukasiewicz rings
    • Abstract: Publication date: July 2016
      Source:Journal of Applied Logic, Volume 16
      Author(s): Albert Kadji, Celestin Lele, Jean B. Nganou
      The goal of the present article is to extend the study of commutative rings whose ideals form an MV-algebra as carried out by Belluce and Di Nola [1] to non-commutative rings. We study and characterize all rings whose ideals form a pseudo MV-algebra, which shall be called here generalized Łukasiewicz rings. We obtain that these are (up to isomorphism) exactly the direct sums of unitary special primary rings.

      PubDate: 2016-04-11T17:00:10Z
  • Editorial Board
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15

      PubDate: 2016-04-11T17:00:10Z
  • Representable posets
    • Abstract: Publication date: Available online 10 March 2016
      Source:Journal of Applied Logic
      Author(s): Rob Egrot
      A poset is representable if it can be embedded in a field of sets in such a way that existing finite meets and joins become intersections and unions respectively (we say finite meets and joins are preserved). More generally, for cardinals α and β a poset is said to be ( α , β ) -representable if an embedding into a field of sets exists that preserves meets of sets smaller than α and joins of sets smaller than β. We show using an ultraproduct/ultraroot argument that when 2 ≤ α , β ≤ ω the class of ( α , β ) -representable posets is elementary, but does not have a finite axiomatization in the case where either α or β = ω . We also show that the classes of posets with representations preserving either countable or all meets and joins are pseudoelementary.

      PubDate: 2016-04-11T17:00:10Z
  • Reasoning about negligibility and proximity in the set of all hyperreals
    • Abstract: Publication date: Available online 6 April 2016
      Source:Journal of Applied Logic
      Author(s): Philippe Balbiani
      We consider the binary relations of negligibility, comparability and proximity in the set of all hyperreals. Associating with negligibility, comparability and proximity the binary predicates N, C and P and the connectives [ N ] , [ C ] and [ P ] , we consider a first-order theory based on these predicates and a modal logic based on these connectives. We investigate the axiomatization/completeness and the decidability/complexity of this first-order theory and this modal logic.

      PubDate: 2016-04-11T17:00:10Z
  • Bunched sequential information
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): Norihiro Kamide
      It is known that the logic BI of bunched implications is a logic of resources. Many studies have reported on the applications of BI to computer science. In this paper, an extension BIS of BI by adding a sequence modal operator is introduced and studied in order to formalize more fine-grained resource-sensitive reasoning. By the sequence modal operator of BIS, we can appropriately express “sequential information” in resource-sensitive reasoning. A Gentzen-type sequent calculus SBIS for BIS is introduced, and the cut-elimination and decidability theorems for SBIS are proved. An extension of the Grothendieck topological semantics for BI is introduced for BIS, and the completeness theorem with respect to this semantics is proved. The cut-elimination, decidability and completeness theorems for SBIS and BIS are proved using some theorems for embedding BIS into BI.

      PubDate: 2016-04-11T17:00:10Z
  • Translation of first order formulas into ground formulas via a completion
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): Robert Demolombe, Luis Fariñas del Cerro, Naji Obeid
      A translation technique is presented which transforms a class of First Order Logic formulas, called Restricted formulas, into ground formulas. For the formulas in this class the range of quantified variables is restricted by Domain formulas. If we have a complete knowledge of the predicates involved in the Domain formulas their extensions can be evaluated with the Relational Algebra and these extensions are used to transform universal (respectively existential) quantifiers into finite conjunctions (respectively disjunctions). It is assumed that the complete knowledge is represented by Completion Axioms and Unique Name Axioms à la Reiter. These axioms involve the equality predicate. However, the translation allows to remove the equality in the ground formulas and for a large class of formulas their consequences are the same as the initial First Order formulas. This result open the door for the design of efficient deduction techniques.

      PubDate: 2016-04-11T17:00:10Z
  • The eco-cognitive model of abduction II
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): Lorenzo Magnani
      In the companion article “The eco-cognitive model of abduction” [66] I illustrated the main features of my eco-cognitive model of abduction (EC-Model). With the aim of delineating further aspects of that “naturalization of logic” recently urged by John Woods [94] I will now set out to further analyze some properties of abduction that are essential from a logical standpoint. When dealing with the so-called “inferential problem”, I will opt for the more general concepts of input and output instead of those of premisses and conclusions, and show that in this framework two consequences can be derived that help clarify basic logical aspects of abductive reasoning: 1) it is more natural to accept the “multimodal” and “context-dependent” character of the inferences involved, 2) inferences are not merely conceived of in the terms of the process leading to the “generation of an output” or to the proof of it, as in the traditional and standard view of deductive proofs, but rather, from this perspective abductive inferences can be seen as related to logical processes in which input and output fail to hold each other in an expected relation, with the solution involving the modification of inputs, not that of outputs. The chance of finding an abductive solution still appears to depend on the Aristotelian concept of “leading away” (ἀπαγωγή) I dealt with in the companion article, that is, on the starting of the application of a supplementary logic implementing an appropriate formal inference engine. An important result I will emphasize is that irrelevance and implausibility are not always offensive to reason. In addition, we cannot be sure, more broadly, that our guessed hypotheses are plausible (even if we know that looking – in advance – for plausibility is a human good and wise heuristic), indeed an implausible hypothesis can later on result plausible. In the last part of the article I will describe that if we wish to naturalize the logic of the abductive processes and its special consequence relation, we should refer to the following main aspects: “optimization of situatedness”, “maximization of changeability” of both input and output, and high “information-sensitiveness”. Furthermore, I will point out that a logic of abduction must acknowledge the importance of keeping record of the “past life” of abductive inferential praxes, contrarily to the fact that traditional demonstrative ideal systems are prototypically characterized by what I call “maximization of memorylessness”.

      PubDate: 2016-04-11T17:00:10Z
  • A multiple-valued logic approach to the design and verification of
           hardware circuits
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): Amnon Rosenmann
      We present a novel approach, which is based on multiple-valued logic (MVL), to the verification and analysis of digital hardware designs, which extends the common ternary or quaternary approaches for simulations. The simulations which are performed in the more informative MVL setting reveal details which are either invisible or harder to detect through binary or ternary simulations. In equivalence verification, detecting different behavior under MVL simulations may lead to the discovery of a genuine binary non-equivalence or to a qualitative gap between two designs. The value of a variable in a simulation may hold information about its degree of truth and its “place of birth” and “date of birth”. Applications include equivalence verification, initialization, assertions generation and verification, partial control on the flow of data by prioritizing and block-oriented simulations. Much of the paper is devoted to theoretical aspects behind the MVL approach, including the reason for choosing a specific algebra for computations and the introduction of the notions of De Morgan Canonical Form and of verification complexity of Boolean expressions. Two basic simulation-based algorithms are presented, one for satisfying and verifying combinational designs and the other for equivalence verification of sequential designs.

      PubDate: 2016-04-11T17:00:10Z
  • Towards a logical belief function theory
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Laurence Cholvy
      This paper presents a version of belief function theory in which masses are assigned to propositional formulas and which allows the modeler to consider integrity constraints. It also provides three combination rules which apply within this framework. It proves that the initial version of belief function theory and its extension to non-exclusive hypotheses are two particular cases of this proposal. It finally shows that, even if this framework is not more expressive than the belief function theory as defined by Dempster and Shafer, its interest resides in the fact that it offers the modeler a rich language to express its beliefs, i.e., the propositional language.

      PubDate: 2016-04-11T17:00:10Z
  • A Dempster–Shafer model of imprecise assertion strategies
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Henrietta Eyre, Jonathan Lawry
      A Dempster–Shafer theory based model of assertion is proposed for multi-agent communications so as to capture both epistemic and strategic uncertainty. Treating assertion as a choice problem, we argue that for complex multi-agent communication systems, individual agents will only tend to have sufficient information to allow them to formulate imprecise strategies for choosing between different possible true assertions. In a propositional logic setting, an imprecise assertion strategy is defined as a functional mapping between a valuation and a set of true sentences, where the latter is assumed to contain the optimal assertion given that particular state of the world. Uncertainty is then quantified in terms of probability distributions defined on the joint space of valuations and strategies, naturally leading to Dempster–Shafer belief and plausibility measures on sets of possible assertions. This model is extended so as to include imprecise valuations and to provide a meta-level treatment of weak and strong assertions. As a case study, we consider the application of our proposed assertion models to the problem of choosing between a number of different vague descriptions, in the context of both epistemic and supervaluationist approaches to vagueness.

      PubDate: 2016-04-11T17:00:10Z
  • The problem of coincidence in a theory of temporal multiple recurrence
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): B.O. Akinkunmi
      Logical theories have been developed which have allowed temporal reasoning about eventualities (à la Galton) such as states, processes, actions, events and complex eventualities such as sequences and recurrences of other eventualities. This paper presents the problem of coincidence within the framework of a first order logical theory formalizing temporal multiple recurrence of two sequences of fixed duration eventualities and presents a solution to it. The coincidence problem is described as: if two complex eventualities (or eventuality sequences) consisting respectively of component eventualities x 0 , x 1 , … , x r and y 0 , y 1 , … , y s both recur over an interval k and all eventualities are of fixed durations, is there a subinterval of k over which the incidence x t and y u for 0 ≤ t ≤ r and 0 ≤ u ≤ s coincide? The solution presented here formalizes the intuition that a solution can be found by temporal projection over a cycle of the multiple recurrence of both sequences.

      PubDate: 2016-04-11T17:00:10Z
  • The principle of signature exchangeability
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): Tahel Ronel, Alena Vencovská
      We investigate the notion of a signature in Polyadic Inductive Logic and study the probability functions satisfying the Principle of Signature Exchangeability. We prove a representation theorem for such functions on binary languages and show that they satisfy a binary version of the Principle of Instantial Relevance. We discuss polyadic versions of the Principle of Instantial Relevance and Johnson's Sufficientness Postulate.

      PubDate: 2016-04-11T17:00:10Z
  • A concept for the evolution of relational probabilistic belief states and
           the computation of their changes under optimum entropy semantics
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Nico Potyka, Christoph Beierle, Gabriele Kern-Isberner
      Coping with uncertain knowledge and changing beliefs is essential for reasoning in dynamic environments. We generalize an approach to adjust probabilistic belief states by use of the relative entropy in a propositional setting to relational languages, leading to a concept for the evolution of relational probabilistic belief states. As a second contribution of this paper, we present a method to compute the corresponding belief state changes by considering a dual problem and present first application and experimental results. The computed belief state usually factorizes and we explain how the factorization can be exploited to store the belief state more compactly and to simplify its computation by exploiting equivalences of worlds. Finally, we present results on the computational complexity of determining equivalence classes.

      PubDate: 2016-04-11T17:00:10Z
  • The left adjoint of Spec from a category of lattice-ordered groups
    • Abstract: Publication date: May 2016
      Source:Journal of Applied Logic, Volume 15
      Author(s): José Luis Castiglioni, Hernán Javier San Martín
      Let us write ℓ G u f for the category whose objects are lattice-ordered abelian groups (l-groups for short) with a strong unit and finite prime spectrum endowed with a collection of Archimedean elements, one for each prime l-ideal, which satisfy certain properties, and whose arrows are l-homomorphisms with additional structure. In this paper we show that a functor which assigns to each object ( A , u ˆ ) ∈ ℓ G u f the prime spectrum of A, and to each arrow f : ( A , u ˆ ) → ( B , v ˆ ) ∈ ℓ G u f the naturally induced p-morphism, has a left adjoint.

      PubDate: 2016-04-11T17:00:10Z
  • Editorial Board
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 2

      PubDate: 2016-04-11T17:00:10Z
  • Robot location estimation in the situation calculus
    • Abstract: Publication date: December 2015
      Source:Journal of Applied Logic, Volume 13, Issue 4, Part 1
      Author(s): Vaishak Belle, Hector J. Levesque
      Location estimation is a fundamental sensing task in robotic applications, where the world is uncertain, and sensors and effectors are noisy. Most systems make various assumptions about the dependencies between state variables, and especially about how these dependencies change as a result of actions. Building on a general framework by Bacchus, Halpern and Levesque for reasoning about degrees of belief in the situation calculus, and a recent extension to it for continuous probability distributions, in this paper we illustrate location estimation in the presence of a rich theory of actions using examples. The formalism also allows specifications with incomplete knowledge and strict uncertainty, as a result of which the agent's initial beliefs need not be characterized by a unique probability distribution. Finally, we show that while actions might affect prior distributions in nonstandard ways, suitable posterior beliefs are nonetheless entailed as a side-effect of the overall specification.

      PubDate: 2016-04-11T17:00:10Z
  • Updating a progic
    • Abstract: Publication date: Available online 1 October 2015
      Source:Journal of Applied Logic
      Author(s): Eric Raidl
      This paper presents a progic, or probabilistic logic, in the sense of Haenni et al. [8]. The progic presented here is based on Bayesianism, as the progic discussed by Williamson [15]. However, the underlying generalised Bayesianism differs from the objective Bayesianism used by Williamson, in the calibration norm, and the liberalisation and interpretation of the reference probability in the norm of equivocation. As a consequence, the updating dynamics of both Bayesianisms differ essentially. Whereas objective Bayesianism is based on a probabilistic re-evaluation, orthodox Bayesianism is based on a probabilistic revision. I formulate a generalised and iterable orthodox Bayesian revision dynamics. This allows to define an updating procedure for the generalised Bayesian progic. The paper compares the generalised Bayesian progic and Williamson's objective Bayesian progic in strength, update dynamics and with respect to language (in)sensitivity.

      PubDate: 2015-10-11T19:08:06Z
  • Computing the Lagrangians of the standard model
    • Abstract: Publication date: Available online 3 October 2015
      Source:Journal of Applied Logic
      Author(s): S.A. Selesnick, J.P. Rawling
      Ordinary quantum logic has well known pathologies rendering it useless for the purposes of computation. However, loosely related logics, based upon variants of Girard's Linear Logic, have been found useful in the context of quantum computation. In one sense, the use of such computational schemes affords a meta level view of the possible provenance of certain expressions not otherwise apparent. Since such logics are presumed to encapsulate the essential behavior of quantum “resources” we may entertain the question as to whether this logical or computational approach could have any bearing upon quantum physics itself. In this article we address the question of the genesis of certain fundamental Lagrangians, namely those occurring in the standard model. If a certain set of sentences in a logic are added to the set of axioms of the logic the resulting structure is generally called a theory by logicians. In this paper we shall introduce a version of such a logic and deduce some of its physical ramifications. Namely, we will show that there is a single type of sequent that, when added to the logical calculus at hand as an axiom, generates in the theory so defined, series whose leading terms match exactly the Yang–Mills Lagrangian density (including a gauge fixing term) and also the Einstein–Hilbert Lagrangian density, most of the remaining terms being negligible at low intensities in both cases. By expanding the logic somewhat, in the manner of second quantization, we are able also to give an account of interaction terms in the Yang–Mills case. This shows that there is a common form ancestral to all the Lagrangians of the standard model in the ensemble of “evolutionary” trees provided by deductions in a certain clearly specified logic, and reveals the differences between the Yang–Mills and gravitational kinetic terms. Thus we acquire a new paradigm for “unification” of the fundamental forces at the level of the underlying logic.

      PubDate: 2015-10-11T19:08:06Z
  • A proof-theoretic universal property of determiners
    • Abstract: Publication date: Available online 11 September 2015
      Source:Journal of Applied Logic
      Author(s): Nissim Francez
      The paper highlights a difference between Model-Theoretic Semantics (MTS) and Proof-Theoretic Semantics (PTS) regarding the meanings of NL-realisable determiners. While MTS uses conservativity as a major filter on GQs as serving NL-realisable determiners' meanings, conservativity fails in serving as such a filter. According to the PTS rendering of conservativity, all determiners are conservative. Instead of conservativity, PTS methodology focuses on other criteria, originating from the inferential role of determiners as captured by the introduction and elimination rules of a meaning-conferring ND-system. The criteria considered in the paper are harmony, stability and purity of rules. The paper presents two examples of conservative “determiners” that can be excluded by the suggested criteria.

      PubDate: 2015-10-11T19:08:06Z
  • Possibilistic reasoning with partially ordered beliefs
    • Abstract: Publication date: Available online 10 September 2015
      Source:Journal of Applied Logic
      Author(s): Fayçal Touazi, Claudette Cayrol, Didier Dubois
      This paper presents the extension of results on reasoning with totally ordered belief bases to the partially ordered case. The idea is to reason from logical bases equipped with a partial order expressing relative certainty and to construct a partially ordered deductive closure. The difficult point lies in the fact that equivalent definitions in the totally ordered case are no longer equivalent in the partially ordered one. At the syntactic level we can either use a language expressing pairs of related formulas and axioms describing the properties of the ordering, or use formulas with partially ordered symbolic weights attached to them in the spirit of possibilistic logic. A possible semantics consists in assuming the partial order on formulas stems from a partial order on interpretations. It requires the capability of inducing a partial order on subsets of a set from a partial order on its elements so as to extend possibility theory functions. Among different possible definitions of induced partial order relations, we select the one generalizing necessity orderings (closely related to epistemic entrenchments). We study such a semantic approach inspired from possibilistic logic, and show its limitations when relying on a unique partial order on interpretations. We propose a more general sound and complete approach to relative certainty, inspired by conditional modal logics, in order to get a partial order on the whole propositional language. Some links between several inference systems, namely conditional logic, modal epistemic logic and non-monotonic preferential inference are established. Possibilistic logic with partially ordered symbolic weights is also revisited and a comparison with the relative certainty approach is made via mutual translations.

      PubDate: 2015-10-11T19:08:06Z
  • Tableau reductions: Towards an optimal decision procedure for the modal
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): Joanna Golińska-Pilarek, Emilio Muñoz-Velasco, Angel Mora
      We present a new prefixed tableau system TK for verification of validity in modal logic K . The system TK is deterministic, it uniquely generates exactly one proof tree for each clausal representation of formulas, and, moreover, it uses some syntactic reductions of prefixes. TK is defined in the original methodology of tableau systems, without any external technique such as backtracking, backjumping, etc. Since all the necessary bookkeeping is built into the rules, the system is not only a basis for a validity algorithm, but is itself a decision procedure. We present also a deterministic tableau decision procedure which is an extension of TK and can be used for the global assumptions problem.

      PubDate: 2015-10-11T19:08:06Z
  • A small look at the ear recognition process using a hybrid approach
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): Pedro Luis Galdámez, Angélica González Arrieta, Miguel Ramón Ramón
      The purpose of this document is to offer a combined approach in biometric analysis field, integrating some of the most known techniques using ears to recognize people. This study uses Hausdorff distance as a pre-processing stage adding sturdiness to increase the performance filtering for the subjects to use it in the testing process. Also includes the Image Ray Transform (IRT) and the Haar based classifier for the detection step. Then, the system computes Speeded Up Robust Features (SURF) and Linear Discriminant Analysis (LDA) as an input of two neural networks to recognize a person by the patterns of its ear. To show the applied theory experimental results, the above algorithms have been implemented using Microsoft C#. The investigation results showed robustness improving the ear recognition process.

      PubDate: 2015-10-11T19:08:06Z
  • Special issue: Combining probability and logic
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): Jürgen Landes, Jon Williamson
      This editorial explains the scope of the special issue and provides a thematic introduction to the contributed papers.

      PubDate: 2015-10-11T19:08:06Z
  • Borderlines and probabilities of borderlines: On the interconnection
           between vagueness and uncertainty
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): Jonathan Lawry
      We describe an integrated approach to vagueness and uncertainty within a propositional logic setting and based on a combination of three valued logic and probability. Three valued valuations are employed in order to model explicitly borderline cases and in this context we give an axiomatic characterisation of two well known three valued models; supervaluations and Kleene valuations. We then demonstrate the close relationship between Kleene valuations and a sub-class of supervaluations. Belief pairs are lower and upper measures on the sentences of the language generated from a probability distribution defined over a finite set of three valued valuations. We describe links between these measures and other uncertainty theories and we show the close relationship between Kleene belief pairs and a sub-class of supervaluation belief pairs. Finally, a probabilistic approach to conditioning is explored within this framework.

      PubDate: 2015-10-11T19:08:06Z
  • An intelligent fault detection system for a heat pump installation based
           on a geothermal heat exchanger
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): José Luis Casteleiro-Roca, Héctor Quintián, José Luis Calvo-Rolle, Emilio Corchado, María del Carmen Meizoso-López, Andrés Piñón-Pazos
      The Heat Pump with geothermal exchanger is one of the best methods to heat up a building. The heat exchanger is an element with high probabilities of failure due to the fact that it is an outside construction and also due to its size. In the present study, a novel intelligent system was designed to detect faults on this type of heating equipment. The novel approach has been successfully empirically tested under a real dataset obtained during measurements along one year. It was based on classification techniques with the aim of detecting failures in real time. Then, the model was validated and verified over the building; it obtains good results in all the operating conditions ranges.

      PubDate: 2015-10-11T19:08:06Z
  • Lakatos's criticism of Carnapian inductive logic was mistaken
    • Abstract: Publication date: Available online 30 September 2015
      Source:Journal of Applied Logic
      Author(s): Teddy Groves
      In [39], Imre Lakatos influentially argued that Carnapian inductive logic was a degenerate research programme. This paper argues that Lakatos's criticism was mistaken and that, according to Lakatos's own standards, Carnapian inductive logic was progressive rather than degenerate.

      PubDate: 2015-10-11T19:08:06Z
  • Improving ontology-based text classification: An occupational health and
           security application
    • Abstract: Publication date: Available online 28 September 2015
      Source:Journal of Applied Logic
      Author(s): Nayat Sanchez-Pi, Luis Martí, Ana Cristina Bicharra Garcia
      Information retrieval has been widely study due to the growing amounts of textual information available electronically. Nowadays organizations and industries are facing the challenge of organizing, analyzing and extract knowledge from masses of unstructured information for decision making process. The development of automatic methods to produce usable structured information from unstructured text sources is extremely valuable to them. Opposed to the traditional text classification methods that needs a set of well-classified trained corpus to perform efficient classification; the ontology-based classifier benefits from the domain knowledge and provides more accuracy. In a previous work we proposed and evaluated an ontology-based heuristic algorithm [1] for occupational health control process, particularly, for the case of automatic detection of accidents from unstructured texts. Our extended proposal is more domain dependent because it use techniques terms and contrast the relevance of these techniques terms into the text, so the heuristic is more accurate. It divides the problem in subtasks such as: (i) text analysis, (ii) recognition and (iii) classification of failed occupational health control, resolving accidents as text analysis, recognition and classification of failed occupational health control, resolving accidents.

      PubDate: 2015-10-11T19:08:06Z
  • Transitivity in coherence-based probability logic
    • Abstract: Publication date: Available online 30 September 2015
      Source:Journal of Applied Logic
      Author(s): Angelo Gilio, Niki Pfeifer, Giuseppe Sanfilippo
      We study probabilistically informative (weak) versions of transitivity by using suitable definitions of defaults and negated defaults in the setting of coherence and imprecise probabilities. We represent p-consistent sequences of defaults and/or negated defaults by g-coherent imprecise probability assessments on the respective sequences of conditional events. Moreover, we prove the coherent probability propagation rules for Weak Transitivity and the validity of selected inference patterns by proving p-entailment of the associated knowledge bases. Finally, we apply our results to study selected probabilistic versions of classical categorical syllogisms and construct a new version of the square of opposition in terms of defaults and negated defaults.

      PubDate: 2015-10-11T19:08:06Z
  • Measuring inaccuracy of uncertain doxastic states in many-valued logical
    • Abstract: Publication date: Available online 30 September 2015
      Source:Journal of Applied Logic
      Author(s): Pavel Janda
      I will propose an alternative philosophical approach to the representation of uncertain doxastic states. I will argue that the current account of measuring inaccuracy of uncertain doxastic states is inadequate for Belnap's four-valued logic. Specifically, a situation can be found in which either an inaccuracy measure returns a completely wrong result or an agent's inaccuracy score is inadequate relative to the mistake in her doxastic attitude. This will motivate an alternative representation of uncertain doxastic states based on ordered pairs. I will describe a possible inaccuracy measure that is suitable for ordered pairs, and I will show that it has all the qualities that are required for an inaccuracy measure to be legitimate. Finally, I will introduce conditions of rationality for uncertain doxastic states represented by ordered pairs.

      PubDate: 2015-10-11T19:08:06Z
  • Approximate postdictive reasoning with answer set programming
    • Abstract: Publication date: Available online 28 August 2015
      Source:Journal of Applied Logic
      Author(s): Manfred Eppe, Mehul Bhatt
      We present an answer set programming realization of the h-approximation ( HPX ) theory [8] as an efficient and provably sound reasoning method for epistemic planning and projection problems that involve postdictive reasoning. The efficiency of HPX stems from an approximate knowledge state representation that involves only a linear number of state variables, as compared to an exponential number for theories that utilize a possible-worlds based semantics. This causes a relatively low computational complexity, i.e, the planning problem is in NP under reasonable restrictions, at the cost that HPX is incomplete. In this paper, we use the implementation of HPX to investigate the incompleteness issue and present an empirical evaluation of the solvable fragment and its performance. We find that the solvable fragment of HPX is indeed reasonable and fairly large: in average about 85% of the considered projection problem instances can be solved, compared to a PWS -based approach with exponential complexity as baseline. In addition to the empirical results, we demonstrate the manner in which HPX can be applied in a real robotic control task within a smart home, where our scenario illustrates the usefulness of postdictive reasoning to achieve error-tolerance by abnormality detection in a high-level decision-making task.

      PubDate: 2015-09-01T10:00:16Z
  • A history based approximate epistemic action theory for efficient
           postdictive reasoning
    • Abstract: Publication date: Available online 28 August 2015
      Source:Journal of Applied Logic
      Author(s): Manfred Eppe, Mehul Bhatt
      We propose an approximation of the possible worlds semantics ( PWS ) of knowledge with support for postdiction – a fundamental inference pattern for diagnostic reasoning and explanation tasks in a wide range of real-world applications such as cognitive robotics, visual perception for cognitive vision, ambient intelligence and smart environments. We present the formal framework, an operational semantics, and an analysis of soundness and completeness results therefrom. The advantage of our approach is that only a linear number of state-variables are required to represent an agent's knowledge state. This is achieved by modeling knowledge as the history of a single approximate state, instead of using an exponential number of possible worlds like in Kripke semantics. That is, we add a temporal dimension to the knowledge representation which facilitates efficient postdiction. Since we consider knowledge histories, we call our theory h-approximation ( HPX ). Due to the linear number of state variables, HPX features a comparably low computational complexity. Specifically, we show that HPX can solve the projection problem in polynomial (tractable) time. It can solve planning problems in NP, while e.g. for the action language A k [48] this is Σ 2 P -complete. In addition to the temporal dimension of knowledge, our theory supports concurrent acting and sensing, and is in this sense more expressive than existing approximations.

      PubDate: 2015-09-01T10:00:16Z
  • Axiomatizing Lüttgen & Vogler's ready simulation for finite
           processes in CLLR
    • Abstract: Publication date: Available online 30 June 2015
      Source:Journal of Applied Logic
      Author(s): Yan Zhang , Zhaohui Zhu , Jinjin Zhang , Yong Zhou
      In the framework of logic labelled transition systems, a variant of weak ready simulation has been presented by Lüttgen and Vogler. It has been shown that such behavioural preorder is the largest precongruence w.r.t parallel and conjunction composition satisfying some desirable properties. This paper offers a ground-complete axiomatization for this precongruence over processes containing no recursion in the calculus CLL R . Compared with the usual inference systems for process calculi, in addition to axioms about process operators, such system contains a number of axioms to characterize the interaction between process operators and logical operators.

      PubDate: 2015-07-01T07:30:17Z
  • An examination of the SEP candidate analogical inference rule within pure
           inductive logic
    • Abstract: Publication date: Available online 16 June 2015
      Source:Journal of Applied Logic
      Author(s): E. Howarth , J.B. Paris , A. Vencovská
      Within the framework of (Unary) Pure Inductive Logic we investigate four possible formulations of a probabilistic principle of analogy based on a template considered by Paul Bartha in the Stanford Encyclopedia of Philosophy [1] and give some characterizations of the probability functions which satisfy them. In addition we investigate an alternative interpretation of analogical support, also considered by Bartha, based not on the enhancement of probability but on the creation of possibility.

      PubDate: 2015-06-20T05:43:26Z
  • Automatic grape bunch detection in vineyards with an SVM classifier
    • Abstract: Publication date: Available online 9 June 2015
      Source:Journal of Applied Logic
      Author(s): Scarlett Liu , Mark Whitty
      Precise yield estimation in vineyards using image processing techniques has only been demonstrated conceptually on a small scale. Expanding this scale requires significant computational power where, by necessity, only small parts of the images of vines contain useful features. This paper introduces an image processing algorithm combining colour and texture information and the use of a support vector machine, to accelerate fruit detection by isolating and counting bunches in images. Experiments carried out on two varieties of red grapes (Shiraz and Cabernet Sauvignon) demonstrate an accuracy of 88.0% and recall of 91.6%. This method is also shown to remove the restriction on the field of view and background which plagued existing methods and is a first step towards precise and reliable yield estimation on a large scale.

      PubDate: 2015-06-13T05:00:14Z
  • Using inductive reasoning for completing OCF-networks
    • Abstract: Publication date: Available online 18 March 2015
      Source:Journal of Applied Logic
      Author(s): Christian Eichhorn , Gabriele Kern-Isberner
      OCF-networks provide the possibility to combine qualitative information expressed by rankings of (conditional) formulas with the strong structural information of a network, in this respect being a qualitative variant of the better known Bayesian networks. Like for Bayesian networks, a global ranking function can be calculated quickly and efficiently from the locally distributed information, whereas the latter significantly reduces the exponentially high complexity of the semantical ranking approach. This qualifies OCF-networks for applications. However, in practical applications the provided ranking information may not be in the format needed to be represented by an OCF-network, or some values may be simply missing. In this paper, we present techniques for filling in the missing values using methods of inductive reasoning and we elaborate on formal properties of OCF-networks.

      PubDate: 2015-03-19T04:33:00Z
  • Editorial: Uncertain reasoning at FLAIRS
    • Abstract: Publication date: Available online 17 March 2015
      Source:Journal of Applied Logic
      Author(s): Christoph Beierle , Cory Butz , Souhila Kaci

      PubDate: 2015-03-19T04:33:00Z
  • Learning discrete Bayesian network parameters from continuous data
           streams: What is the best strategy?
    • Abstract: Publication date: Available online 18 March 2015
      Source:Journal of Applied Logic
      Author(s): Parot Ratnapinda , Marek J. Druzdzel
      We compare three approaches to learning numerical parameters of discrete Bayesian networks from continuous data streams: (1) the EM algorithm applied to all data, (2) the EM algorithm applied to data increments, and (3) the online EM algorithm. Our results show that learning from all data at each step, whenever feasible, leads to the highest parameter accuracy and model classification accuracy. When facing computational limitations, incremental learning approaches are a reasonable alternative. While the differences in speed between incremental algorithms are not large (online EM is slightly slower), for all but small data sets online EM tends to be more accurate than incremental EM.

      PubDate: 2015-03-19T04:33:00Z
  • Conflict-free and conflict-tolerant semantics for constrained
           argumentation frameworks
    • Abstract: Publication date: Available online 18 March 2015
      Source:Journal of Applied Logic
      Author(s): Ofer Arieli
      In this paper we incorporate integrity constraints in abstract argumentation frameworks. Two types of semantics are considered for these constrained frameworks: conflict-free and conflict-tolerant. The first one is a conservative extension of standard approaches for giving coherent-based semantics to argumentation frameworks, where in addition certain constraints must be satisfied. A primary consideration behind this approach is a dismissal of any contradiction between accepted arguments of the constrained frameworks. The second type of semantics preserves contradictions, which are regarded as meaningful and sometimes even critical for the conclusions. We show that this approach is particularly useful for assuring the existence of non-empty extensions and for handling contradictions among the constraints, in which cases conflict-free extensions are not available. Both types of semantics are represented by propositional sets of formulas and are evaluated in the context of three-valued and four-valued logics. Among others, we show a one-to-one correspondence between the models of these theories, the extensions, and the labelings of the underlying constrained argumentation frameworks.

      PubDate: 2015-03-19T04:33:00Z
  • On the complexity of bribery and manipulation in tournaments with
           uncertain information
    • Abstract: Publication date: Available online 18 March 2015
      Source:Journal of Applied Logic
      Author(s): Nicholas Mattei , Judy Goldsmith , Andrew Klapper , Martin Mundhenk
      We study the computational complexity of bribery and manipulation schemes for sports tournaments with uncertain information. We introduce a general probabilistic model for multi-round tournaments and consider several special types of tournament: challenge (or caterpillar); cup; and round robin. In some ways, tournaments are similar to the sequential pair-wise, cup and Copeland voting rules. The complexity of bribery and manipulation are well studied for elections, usually assuming deterministic information about votes and results. We assume that for tournament entrants i and j, the probability that i beats j and the costs of lowering each probability by fixed increments are known to the manipulators. We provide complexity analyses for several problems related to manipulation and bribery for the various types of tournaments. Complexities range from probabilistic log space to NP PP . This shows that the introduction of uncertainty into the reasoning process drastically increases the complexity of bribery problems in some instances.

      PubDate: 2015-03-19T04:33:00Z
  • Editorial: Weighted logics for artificial intelligence – 2
    • Abstract: Publication date: Available online 10 March 2015
      Source:Journal of Applied Logic
      Author(s): Lluis Godo , Henri Prade , Guilin Qi

      PubDate: 2015-03-15T03:34:10Z
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