The concepts of free modules, projective modules, injective modules and the likeform an important area in module theory. The notion of free fuzzy modules was introducedby Muganda as an extension of free modules in the fuzzy context. Zahedi and Ameriintroduced the concept of projective and injective L-modules. In this paper we give analternate definition for projective L-modules. We prove that e...

let $r$ be a commutative ring with identity and $m$ be a finitely generated unital $r$-module. in this paper, first we give necessary and sufficient conditions that a finitely generated module to be a multiplication module. moreover, we investigate some conditions which imply that the module $m$ is the direct sum of some cyclic modules and free modules. then some properties of fitting ideals of...

This dissertation primarily focuses on robotic self-replication including a theoretical framework and quantitative measures that can be applied to self-replicating systems. A new descriptive model for physical replicating systems is introduced based on three sets of components: an initial functional system, a set of resources, and a set of external elements. Robotic self-replication is viewed a...

In this paper we examine locomotion in the context of self-reconfigurable robots. Self-reconfigurable robots are robots built from many connected modules. A selfreconfigurable robot can change its shape and configuration by changing the way these modules are connected. The focus of this paper is to understand how several locomotion gaits can be represented in such a robot and how the robot can ...

Self-reconfigurable robots can change their shape by rearranging the modules from which they are built. This self-reconfiguration process has proven difficult to control, because it involves control of a distributed system of autonomous, but mechanically coupled modules connected in time-varying ways. In this work we address this control problem and specifically look at how to construct dense c...

This paper presents a distributed control method for a collection of homogeneous robotic modules. We propose that by modelling simple cellular adhesion mechanisms, collections of these modules can self-assemble into virtually bonded aggregates which behave as predicted by Steinberg’s ‘differential adhesion hypothesis’. This allows simple self-repairing hierarchical structures to be formed, the ...

This paper presents a role-based approach to the problem of controlling locomotion of chain-type self-reconfigurable robots. In role-based control, all modules are controlled by identical controllers. Each controller consists of several playable roles and a role-selection mechanism. A role represents the motion of a module and how it synchronizes with connected modules. A controller selects whi...

BACKGROUND This paper investigated adherence to a self-help web-based intervention for PTSD (Chinese My Trauma Recovery, CMTR) in mainland China and evaluated the association between adherence measures and potential predictors, for example, traumatic symptoms and self-efficacy. METHODS Data from 56 urban and 90 rural trauma survivors were reported who used at least one of the seven recovery m...

In this paper, we present a methodology to performfast testing of the control path of self-timed circuits [91. The speedup is achieved by testing all the execution paths in the control simultaneously. The circuits considered in this paper are those designed using an OCCAM based circuit compiler [2]. This Compiler translates an OCCAM pro gram description into an interconnection of pre-existing s...