Most welding processes for plastics do not meet the special demands of micro technology. Laser transmission welding, however, features distinctive advantages like low mechanical and thermal load of the joining parts. Hence it is particularly suitable for the welding of micro plastics parts. Certain optical properties of the components to be welded are needed though. While one of the welding par...

Competition is on rise in generation and distribution, which results huge transactions. Nonetheless, transmission lines are overloaded, since transmission system provides access of electricity having limited corridors. Consequently, the probability of congestion tends to be prominent. Congestion in transmission corridors not only causes collapse of that particular area but affects other area as...

Digital subscriber line (DSL) technology for high-speed data transmission over the local-loop telephone twisted pairs was advanced in the labs of several research institutions during the late 1980’s and early 1990’s. Researchers began to develop and experiment with new transmission ideas and to realize high-speed modems in prototype form. As technology matured and standards evolved, these modem...

1. Introduction In order to meet the rapidly increasing demand for communications over metro networks and international submarine cable networks, it is essential to secure larger transmission capacity and higher equipment reliability. Indispensable technologies to satisfy these requirements include: design and verification technologies that realize large-capacity transmission of 40 and 100 Gbps...

*1 MIMO: Wireless communications technology for expanding transmission capacity by using multiple transmit/receive antennas. *2 Propagation channel: An individual communication path in wireless communications. In this article, a communication path between transmit/receive antennas. *3 Eigenmode transmission: A MIMO multiple transmission system that transmits signals by arranging the pattern on ...

-The demand for increased channel capacity in wireless and mobile communication has been rapidly increasing due to multi fold increase in demands of mobile data and multimedia services. In the present scenario, high data rate are provided by WLAN, WiMax and LTE/ LTE-Advanced (LTE-A). Developing a wireless system with more spectral efficiency under varying channel condition is a key challenge to...

A new type detection device for the suspended flyer was developed to test the press finger and performance parameters of the flyer. The device was made up of mechanical transmission, control and signal processing part, which realized full automation of measurement by wireless transmission technology. Hybrid driven differential adjustable framework was employed in the device, so the bobbin windi...

this paper, we study statistical multiplexing of VBR video in ATM networks. ATM promises to provide high speed real-time multi-point to central video transmission for telemedicine applications in rural hospitals and in emergency medical services. Video coders are known to produce variable bit rate (VBR) signals and the effects of aggregating these VBR signals need to be determined in order to d...

A commonly held view is that nominal rigidities are important for the transmission of monetary policy shocks. We argue that they are also important for understanding the dynamic effects of technology shocks, especially on labor hours, wages, and prices. Based on a dynamic general equilibrium framework, our closed-form solutions reveal that a pure sticky-price model predicts correctly that hours...

NTT DOCOMO Technical Journal Vol. 10 No. 4 *1 MIMO: A signal transmission technology that uses multiple antennas at both the transmitter and receiver to perform spatial multiplexing and improve communication quality and spectral efficiency. *2 Beam forming: A method for improving signal separation performance at the receiving side by doing precoding on the transmitting side based on channel dat...