As is pointed out in [Smith (1997)], in many applications of quasigroups isotopies and homotopies are more important than isomorphisms and homomorphisms. In this paper, the way homotopies may arise in the context of categorical quasigroup model theory is investigated. In this context, the algebraic structures are specified by diagram-based logics, such as sketches, and categories of models beco...

This paper presents an agent-based automated negotiation mechanism for multi-issue negotiation in ecommerce. To avoid a deadlock in which both agents are unwilling to concede or refuse to disclose more information may arise in the traditional alternating-offer pattern, the information of both agents is considered completely private. In our model, the issues are divided into two categories (i.e....

This article empirically validates an existing content analysis scheme and addresses a main concern of researchers about text-based, online transcripts in the form of code-recoding by mapping our scheme to the practical inquiry, cognitive presence model’s five phases directly to realise higher-order thinking or critical thinking aspects for our software engineering students at London Metropolit...

This paper describes some results of a recent survey of predictive methods that are currently in use for explosion hazard assessments in the UK offshore industry. Three categories of models, namely empirical models, physically-based models and numerical models, are addressed in the survey. A brief description is provided on the key features of the models for each category and the potential adva...

Basic-level categories have been shown to be both psychologically significant and useful in a wide range of practical applications. We build a rule-based system to identify basic-level categories in WordNet, achieving 77% accuracy on a test set derived from prior psychological experiments. With additional annotations we found our system also has low precision, in part due to the existence of ma...

In this paper we look at an image retrieval scenario that we call mental image category search, where the user has an image class in his or her mind and wishes to retrieve several such images from a database, without the benefit of an example. We propose a content-based image retrieval system based on Bayesian inference. The approach is evaluated by performing searches for categories of image t...

We investigate abelian quotients arising from extriangulated categories via morphism categories, which is a unified treatment for both exact and triangulated categories. Let $(\mathcal {C},\mathbb {E},\mathfrak {s})$ be an category with enough projectives $\mathcal {P}$ ${\mathscr{M}}$ full subcategory of {C}$ containing . show that certain quotient $\mathfrak {s}\textup {-def}({\mathscr{M}})$ ...

Abstract Given a negatively graded Calabi-Yau algebra, we regard it as DG algebra with vanishing differentials and study its cluster category. We show that this is sign-twisted realise category triangulated hull of an orbit derived the singularity finite-dimensional Iwanaga-Gorenstein algebra. Along way, give two results stand on their own. First, coherent sheaves over has natural tilting subca...