background: back and shoulder pain are most common musculoskeletal disorders in students, that the way of sitting or interactions with academic equipment is a major risk factor for these disorders.  the aims of this study is redesign and construct a prototype of painting chair (kharak) by using industrial design and ergonomic methods to reduce musculoskeletal disorders and increase user satisfa...

The design of a virtual keyboard, capable of reproducing the tactile feedback of several musical instruments is reported. The key is driven by a direct drive motor, which allows friction free operations. The force to be generated by the motor is calculated in real time by a dynamic simulator, which contains the model of mechanisms’ components and constraints. Each model is tuned on the basis of...

This paper presents a case study in modelling and verifying the Linux Virtual File System (VFS). Our work is set in the context of Hoare’s verification grand challenge and, in particular, Joshi and Holzmann’s mini-challenge to build a verifiable file system. The aim of the study is to assess the viability of retrospective verification of a VFS implementation using model-checking technology. We ...

In an attempt to create alternative methods of both playing and studying vibrating strings, we have modeled and constructed a software-driven instrument for use in the electromagnetic excitation of an acoustic grand piano’s strings. Both a virtual and material version of such a system are discussed, along with some of the theory of operation. Applications to musical composition and expression, ...

Additive manufacturing poses a number of challenges to conventional understandings of materiality, including the so-called archaeological record. In particular, concepts such as real, virtual, and authentic are becoming increasingly unstable, as archaeological artefacts and assemblages can be digitalised, reiterated, extended and distributed through time and space as 3D printable entities. This...

The idea of realistic HCI, as described with RealityBased Interaction, continuously adapting to the users experience of the interaction, is a grand vision. RealityBased Brain-Computer Interaction (RBBCI) is a conception of a system implementing this idea by combining Virtual Reality with functional brain imaging (fMRI) and appropriate methods of analysis and interpretation. The development of s...

Even though there has been a proliferation of e-society measures in recent years, analyses of the metrics of the “information society” are still far from responsive to the needs of many stakeholders and continue to suffer from a number of serious limitations. Issues in eight critical areas are briefly presented. They include: definition of the universe to be measured; definition of the objects ...

As the next generation of engineers, engineering students at the local level have specific views on what key issues should be addressed in the coming decades. Results of a University of Kansas survey completed by over 220 engineering students from sophomores to graduate students in seven engineering majors from five departments are reported, analyzed, and compared with the 14 Grand Challenges f...

avian leukosis viruses (alvs) cause different types of tumours in poultry and can affect the health and egg production of the birds. to investigate the presence of the virus in chicken layer flocks in shiraz, 222 egg albumen from local layer breeder (25 eggs), local layer grand parent (30 eggs), broiler breeder (60 eggs), commercial layer (46 eggs) and broiler grand parent (61 eggs) were tested...