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ENGINEERING (1203 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 1001 - 1200 of 1205 Journals sorted alphabetically
Progress in Nanotechnology and Nanomaterials     Open Access   (Followers: 4)
Progress in Photovoltaics: Research & Applications     Hybrid Journal   (Followers: 6)
Progress in Polymer Science     Full-text available via subscription   (Followers: 32)
Propellants, Explosives, Pyrotechnics     Hybrid Journal   (Followers: 231)
Propulsion and Power Research     Open Access   (Followers: 15)
Purinergic Signalling     Hybrid Journal   (Followers: 1)
Quaderns d’Història de l’Enginyeria     Open Access  
Quality and Reliability Engineering International     Hybrid Journal   (Followers: 11)
Quality Engineering     Hybrid Journal   (Followers: 8)
Radiochimica Acta     Hybrid Journal   (Followers: 5)
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: 3)
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: 16)
Remote Sensing Letters     Hybrid Journal   (Followers: 18)
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: 22)
Review of Symbolic Logic     Full-text available via subscription   (Followers: 1)
Reviews in Advanced Sciences and Engineering     Partially Free   (Followers: 2)
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 Iberoamericana de Automática e Informática Industrial RIAI     Open Access  
Revista Informador Técnico     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access  
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería     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: 6)
Safety Science     Hybrid Journal   (Followers: 17)
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   (Followers: 1)
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)
Selcuk University Journal of Engineering, Science and Technology     Open Access   (Followers: 1)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 21)
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: 12)
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     Hybrid Journal   (Followers: 2)
SIAM Journal on Mathematical Analysis     Hybrid Journal   (Followers: 3)
SIAM Journal on Matrix Analysis and Applications     Hybrid Journal   (Followers: 1)
SIAM Journal on Numerical Analysis     Hybrid Journal   (Followers: 4)
SIAM Journal on Optimization     Hybrid Journal   (Followers: 6)
SIAM Review     Hybrid Journal   (Followers: 5)
SILICON     Hybrid Journal  
Sistemas & Telemática     Open Access   (Followers: 1)
Sleep and Biological Rhythms     Hybrid Journal   (Followers: 4)
Small     Hybrid Journal   (Followers: 9)
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: 10)
Soldagem & Inspeção     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 8)
SourceOCDE Developpement urbain, rural et regional     Full-text available via subscription   (Followers: 1)
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: 27)
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: 4)
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   (Followers: 1)
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: 3)
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: 11)
Terahertz Science and Technology, IEEE Transactions on     Hybrid Journal   (Followers: 2)
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: 10)
Theoretical Issues in Ergonomics Science     Hybrid Journal   (Followers: 2)
Thermal Engineering     Hybrid Journal   (Followers: 4)
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: 48)
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: 33)
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   (Followers: 1)
Ultramicroscopy     Hybrid Journal   (Followers: 2)
Uludağ University Journal of The Faculty of Engineering     Open Access  
Universal Journal of Applied Science     Open Access   (Followers: 2)
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  
Waves, Wavelets and Fractals     Open Access  
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: 9)
World Journal of Engineering     Full-text available via subscription   (Followers: 3)
World Journal of Engineering and Technology     Open Access  
World Journal of Environmental Engineering     Open Access   (Followers: 2)
World Pumps     Full-text available via subscription   (Followers: 2)
World Science and Technology     Full-text available via subscription   (Followers: 1)

  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  [2970 journals]
  • Formalization of Reliability Block Diagrams in Higher-order Logic
    • Abstract: Publication date: Available online 15 June 2016
      Source:Journal of Applied Logic
      Author(s): Waqar Ahmed, Osman Hasan, Sofiène Tahar
      Reliability Block Diagrams (RBDs) allow us to model the failure relationships of complex systems and their sub-components and are extensively used for system reliability, availability and maintainability analyses. Traditionally, these RBD-based analyses are done using paper-and-pencil proofs or computer simulations, which cannot ascertain absolute correctness due to their inaccuracy limitations. As a complementary approach, we propose to use the higher-order logic theorem prover HOL to conduct RBD-based analysis. For this purpose, we present a higher-order logic formalization of commonly used RBD configurations, such as series, parallel, parallel-series and series-parallel, and the formal verification of their equivalent mathematical expressions. A distinguishing feature of the proposed RBD formalization is the ability to model nested RBD configurations, which are RBDs having blocks that also represent RBD configurations. This generality allows us to formally analyze the reliability of many real-world systems. For illustration purposes, we formally analyze the reliability of a generic Virtual Data Center (VDC) in a cloud computing infrastructure exhibiting the nested series-parallel RBD configuration.

      PubDate: 2016-06-18T18:01:34Z
  • Bridging Curry and Church's typing style
    • Abstract: Publication date: Available online 16 June 2016
      Source:Journal of Applied Logic
      Author(s): Fairouz Kamareddine, Jonathan P. Seldin, J.B. Wells
      There are two versions of type assignment in the λ-calculus: Church-style, in which the type of each variable is fixed, and Curry-style (also called “domain free”), in which it is not. As an example, in Church-style typing, λ x : A . x is the identity function on type A, and it has type A → A but not B → B for a type B different from A. In Curry-style typing, λ x . x is a general identity function with type C → C for every type C. In this paper, we will show how to interpret in a Curry-style system every Pure Type System (PTS) in the Church-style without losing any typing information. We will also prove a kind of conservative extension result for this interpretation, a result which implies that for most consistent PTSs of the Church-style, the corresponding Curry-style system is consistent. We will then show how to interpret in a system of the Church-style (a modified PTS, stronger than a PTS) every PTS-like system in the Curry style.

      PubDate: 2016-06-18T18:01:34Z
  • Hoop twist-structures
    • Abstract: Publication date: November 2016
      Source:Journal of Applied Logic, Volume 18
      Author(s): Shokoofeh Ghorbani
      In this paper, we introduce hoop twist-structure whose members are built as special squares of an arbitrary hoop. We show how our construction relates to eN4-lattices (N4-lattices) and implicative twist-structures. We prove that hoop twist-structures form a quasi-variety and characterize the AHT-congruences of each algebra in this quasi-variety in terms of the congruences of the associated hoop.

      PubDate: 2016-06-14T06:00:23Z
  • Editorial Board
    • Abstract: Publication date: July 2016
      Source:Journal of Applied Logic, Volume 16

      PubDate: 2016-06-14T06:00:23Z
  • Automatic non-linear analysis of non-invasive writing signals, applied to
           essential tremor
    • Abstract: Publication date: July 2016
      Source:Journal of Applied Logic, Volume 16
      Author(s): K. Lopez-de-Ipiña, A. Bergareche, P. de la Riva, M. Faundez-Zanuy, P.M. Calvo, J. Roure, E. Sesa-Nogueras
      Essential tremor (ET) in the western world is the most common movement disorder, and 50–70% of essential tremor cases are estimated to be genetic in origin [14]. This work on selection of nonlinear biomarkers derived from drawings and handwriting is part of a wider cross-study for the diagnosis of essential tremor led by Biodonostia Institute. These biomarkers include not only classic linear features, but also non-linear: fractal dimension and entropy. The presence of integrated features of other diseases such as stress is also analyzed. In future works, these new biomarkers will be integrated with the ones obtained in the wider study of Biodonostia. Note that the use of these methods provide undoubted benefits towards the development of more sustainable, low-cost, high-quality, and non-invasive technologies. These systems are easily adaptable to the user and environment, and can be very useful in real complex environments with regard to a social and economic point of view.

      PubDate: 2016-06-14T06:00:23Z
  • Editorial: Dynamics of Knowledge and Belief
    • Abstract: Publication date: Available online 10 May 2016
      Source:Journal of Applied Logic
      Author(s): Christoph Beierle, Gabriele Kern-Isberner

      PubDate: 2016-05-16T00:00:17Z
  • Qualitative probabilistic inference under varied entropy levels
    • Abstract: Publication date: Available online 10 May 2016
      Source:Journal of Applied Logic
      Author(s): Paul D. Thorn, Gerhard Schurz
      In previous work, we studied four well known systems of qualitative probabilistic inference, and presented data from computer simulations in an attempt to illustrate the performance of the systems. These simulations evaluated the four systems in terms of their tendency to license inference to accurate and informative conclusions, given incomplete information about a randomly selected probability distribution. In our earlier work, the procedure used in generating the unknown probability distribution (representing the true stochastic state of the world) tended to yield probability distributions with moderately high entropy levels. In the present article, we present data charting the performance of the four systems when reasoning in environments of various entropy levels. The results illustrate variations in the performance of the respective reasoning systems that derive from the entropy of the environment, and allow for a more inclusive assessment of the reliability and robustness of the four systems.

      PubDate: 2016-05-16T00:00:17Z
  • An overview of algorithmic approaches to compute optimum entropy
           distributions in the expert system shell MECore (extended version)
    • Abstract: Publication date: Available online 10 May 2016
      Source:Journal of Applied Logic
      Author(s): Nico Potyka, Engelbert Mittermeier, David Marenke
      The expert system shell MECore provides a series of knowledge management operations to define probabilistic knowledge bases and to reason under uncertainty. To provide a reference work for MECore algorithmics, we bring together results from different sources that have been applied in MECore and explain their intuitive ideas. Additionally, we report on our ongoing work regarding further development of MECore's algorithms to compute optimum entropy distributions and provide some empirical results. Altogether this paper explains the intuition of important theoretical results and their practical implications, compares old and new algorithmic approaches and points out their benefits as well as possible limitations and pitfalls.

      PubDate: 2016-05-16T00:00:17Z
  • Extending adaptive world modeling by identifying and handling insufficient
           knowledge models
    • Abstract: Publication date: Available online 10 May 2016
      Source:Journal of Applied Logic
      Author(s): Achim Kuwertz, Jürgen Beyerer
      Adaptive knowledge modeling is an approach for extending the abilities of the Object-Oriented World Model, a system for representing the state of an observed real-world environment, to open-world modeling. In open environments, entities unforeseen at the design-time of a world model can occur. For coping with such circumstances, adaptive knowledge modeling is tasked with adapting the underlying knowledge model according to the environment. The approach is based on quantitative measures, introduced previously, for rating the quality of knowledge models. In this contribution, adaptive knowledge modeling is extended by measures for detecting the need for model adaptation and identifying the potential starting points of necessary model change as well as by an approach for applying such change. Being an extended and more detailed version of [1], the contribution also provides background information on the architecture of the Object-Oriented World Model and on the principles of adaptive knowledge modeling, as well as examination results for the proposed methods. In addition, a more complex scenario is used to evaluate the overall approach.

      PubDate: 2016-05-16T00:00:17Z
  • A geometric principle of indifference
    • Abstract: Publication date: Available online 11 May 2016
      Source:Journal of Applied Logic
      Author(s): Lieven Decock, Igor Douven, Marta Sznajder
      That one's degrees of belief at any one time obey the axioms of probability theory is widely regarded as a necessary condition for static rationality. Many theorists hold that it is also a sufficient condition, but according to critics this yields too subjective an account of static rationality. However, there are currently no good proposals as to how to obtain a tenable stronger probabilistic theory of static rationality. In particular, the idea that one might achieve the desired strengthening by adding some symmetry principle to the probability axioms has appeared hard to maintain. Starting from an idea of Carnap and drawing on relatively recent work in cognitive science, this paper argues that conceptual spaces provide the tools to devise an objective probabilistic account of static rationality. Specifically, we propose a principle that derives prior degrees of belief from the geometrical structure of concepts.

      PubDate: 2016-05-16T00:00:17Z
  • 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
  • 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
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