in this paper, the important formation control problem of nonholonomic wheeled mobile robots is investigated via a leader-follower strategy. to this end, the dynamics model of the considered wheeled mobile robot is derived using lagrange equations of motion. then, using adams multi-body simulation software, the obtained dynamics of the wheeled system in matlab software is verified. after that, ...

abstract: the profound effect of mgovernment on the future of businesses and communities has been proven in numerous studies. the aim of the present study is provide a model for user requirements and validate the proposed model is based on a literature review of research. the findings suggest that effective and efficient transactions including time, security, privacy, reliability and cost of th...

in recent years, the advancement of information and communication technologies and particularly rapid changes of mobile technologies lead to new applications and services. furthermore, the possibility of mobile service delivery will change its current applications. therefore, it is important to identify the user’s acceptance of mobile services; thus, it is necessary to determine the effective a...

separation of polycyclic aromatic hydrocarbons was performed by rp-hplc using mixed micellar mobile phase. effect of temperature, types and amounts of coorganic solvent in mobile phase on efficiency, asymmetry factor and selectivity factor showed that the appropriate condition for separation of these compounds was 3% isopropanol (v/v) as co-organic solvent in mobile phase at 40°c. analysis of t...

education has stepped to an ultra-place and time in 21st century. we have entered to digital and wireless communication century which mobile technologies have changed the process of education and instruction. the application of these mobile technologies for creation of knowledge, attitude and skill in learners is called mobile learning. the effectiveness of mobile learning programs requires new...

background: the health effect of rapidly increasing everyday exposure of humans to radiofrequency radiation is a major global concern. mobile phone jammers prevent the mobile phones from receiving signals from base stations by interfering with authorized mobile carriers’ services. in spite of the fact that mobile jammer use is illegal, they are occasionally used in offices, shrines, conference ...

  Omni directional mobile robots have been popularly employed in several applications especially in soccer player robots considered in Robocup competitions. However, Omni directional navigation system, Omni-vision system and solenoid kicking mechanism in such mobile robots have not ever been combined. This situation brings the idea of a robot with no head direction into existence, a comprehensi...

In this paper, a formal model for antivirus update agent system is presented based on mobile agent technology and predicate/transition Petri nets. The mobile agent system contains two mobile agents called DCA and UNA. It sends out agents to update antivirus on client computers in a network. Each agent takes on a specified responsibility. First, DCA roams through the network and check the last d...