The continuum theory of sintering is used for the analysis of the stability of forging of a cylindrical powder specimen. The constitutive properties of the powder material are assumed to follow a power-law creep relationship. Temperature-coupled linear non-uniform stability analyses are carried out. Stability maps are obtained for forging of copper powder components.

Article history: Received: 10.04.2015. Received in revised form: 13.05.2015. Accepted: 29.05.2015. According to the diver motion characteristics, which are low speed and rapid change of direction, a multi-directional motion model is presented. Then the motion model is introduced into an interacting multiple model method, while the timevarying motion model transition probability was corrected ac...

This paper proposes a compression scheme for medical images through differential pulse code modulation coding of multi resolution and multidirectional subbands. Multi resolution representation of the medical images are obtained through laplacian pyramid which successfully decorrelates the image and thus reduces the redundant information by representing the image by a coarse signal at a lower re...

In this paper, we perform a comparative evaluation of characteristics multi-hop transmission of typical omni-directional MAC protocol IEEE 802.11 DCF and three directional MAC protocols. We consider the validity of the directional MAC protocols and problems. Additionally, we describe the suitable environment when a directional MAC protocol is used. Furthermore, we propose three schemes as deali...

OCB3 is the current version of the OCB authenticated encryption mode which is selected for the third round in CAESAR. So far the integrity analysis has been limited to an adversary making a single forging attempt. A simple extension for the best known bound establishes integrity security as long as the total number of query blocks (including encryptions and forging attempts) does not exceed the...

Hot closed die forging is a regular process applied to manufacture metallic components used in supporting and fixing cable conductors in electric power transmission lines. In this forming process, the final microstructure of the workpiece depends on the control of several processing parameters. In this study, simulation of the industrial forging process of a ball hook component was performed us...

Due to the late response to process condition changes, forging processes are normally exposed to a large number of defective products. To achieve online process monitoring, multichannel tonnage signals are often collected from the forging press. The tonnage signals contain significant amount of real time information regarding the product and the process conditions. In this paper, a methodology ...

This paper presents the viewing angle improvement of integral imaging (II) three-dimensional (3D) display system using horizontal and vertical multi-directional projections and elemental image (EI) rearranging method with pepper and salt noise reduction. Through this way, each elemental lens of micro lens array gathers horizontal and vertical multi-directional illuminations of multiple EI sets ...

This paper describes a new method of multimedia information retrieval which shows multimedia information on a screen in a multi-directional way, using perspective, during the process of recursive interactive retrieval. This method supports a graphical, sensitive and individually tailored interaction between a user and multimedia data. The original work here in is the support of interaction betw...