Wireless energy

Xem 1-20 trên 59 kết quả Wireless energy
  • There is a basic law in thermodynamics; the law of conservation of energy, which states that energy may neither be created nor destroyed just can be transformed. Nature is an expert using this physics fundamental law favouring life and evolution of species all around the planet, it can be said that we are accustomed to live under this law that we do not pay attention to its existence and how it influence our lives.

    pdf262p nhatkyvodanh 05-09-2012 39 6   Download

  • Over the past decade, there has been a prolific increase in the research, development and commercialisation of Wireless Sensor Networks (WSNs) and their associated technologies (see Figure 1). This rise has been a result of a number of contributing factors, including continued miniaturisation (leading towards an era of truly ‘pervasive’ and ‘invisible’ computing); low-power circuits, devices and computation (for example, the ultra-low-power sleep states now found in microcontrollers); and efficient short-range communication (such as ZigBee and Bluetooth).

    pdf504p 123859674 04-07-2012 107 18   Download

  • Wireless Sensor Networking is one of the most important new technologies of the century and has been identified to see significant grow in the next decades. Wireless sensor networks are power-efficient, small-size and communicate wirelessly among each other to cooperatively monitor and access the properties of their targeted environments. Applications reach from health monitoring, through industrial and environmental monitoring to safety applications.

    pdf278p 123859674 04-07-2012 40 9   Download

  • Wireless Sensor Networks came into prominence around the start of this millennium motivated by the omnipresent scenario of small-sized sensors with limited power deployed in large numbers over an area to monitor different phenomenon. The sole motivation of a large portion of research efforts has been to maximize the lifetime of the network, where network lifetime is typically measured from the instant of deployment to the point when one of the nodes has expended its limited power source and becomes in-operational – commonly referred as first node failure....

    pdf0p 123859674 04-07-2012 80 8   Download

  • For the past decade, there has been rapid development and advancement in the communication and sensor technologies that results in the growth of a new, attractive and challenging research area – the wireless sensor network (WSN). A WSN, which typically consists of a large number of wireless sensor nodes formed in a network fashion, is deployed in environmental fields to serve various sensing and actuating applications.

    pdf0p 123859674 04-07-2012 37 6   Download

  • A WSN is composed of a large number of sensor nodes that are communicating using a wireless medium. The sensor nodes are deployed in the environment to be monitored in ad hoc structure. In WSN, there is sink node that collects data from all sensors, and usually not all nodes hear all other nodes. WSN is considered a multi-hop network.

    pdf0p 123859674 04-07-2012 55 6   Download

  • Many exciting impacts on our daily life are shortly anticipated due to recent advances in wireless communication networks that enable real-time multimedia services to be provided via mobile broadband Internet on a wide variety of terminal devices. The trend is mainly driven by the evolution of wireless networks and advanced wireless information and communication technology (ICT).

    pdf0p ktcn_1 10-07-2012 36 5   Download

  • In the early 21st century, research and development on sustainable energy harvesting (EH) technologies have started. Since then, many EH technologies have evolved, advanced and even been successfully developed into hardware prototypes for proof of concept like Helimote, AmbiMax, et al. Researchers from all around the world are devoting their precious time and efforts into finding a realistic and novel energy harvesting solutions for sustaining the operational lifetime of low‐power electronic devices like mobile gadgets, smart wireless sensor networks, etc....

    pdf268p ktcn_1 10-07-2012 35 5   Download

  • Wireless technology has enormous potential to change the way people and things communicate. Future wireless networks will allow people on the move to communicate with anyone, anywhere, and at any time using a range of high-performance multimedia services. Wireless video will support applications such as enhanced social networking, distance learning and remote medicine. Wireless sensor networks can also enable a new class of intelligent home electronics, smart and energy-efficient buildings and highways, and in-body networks for analysis and treatment of medical conditions....

    ppt33p muathu_102 28-01-2013 27 4   Download

  • Sputtering is similar to vacuum deposition. In this method, an inert gas such as argon or helium is introduced into a chamber that contains anode and cathode electrodes supplied by an external high-voltage source. The anode contains the sample to be deposited on and the cathode contains the deposited material. The principle is that the high voltage ignites a plasma effect in the inert gas and the gas ions bombard the target containing the material to be deposited. When the kinetic energy of the bombarding ions is sufficiently high, some of the atoms from the target surface are freed and...

    pdf10p thachsaudoi 22-12-2009 72 16   Download

  • Energy harvesting from ambient waste energy for the purpose of running low-powered electronics has emerged during the last decade as an enabling technology for wireless applications. The goal of this technology is to provide remote sources of electric power and/or to recharge storage devices, such as batteries and capacitors. The concept has ecological ramifications in reducing the chemical waste produced by replacing batteries and potential monetary gains by reducing maintenance costs.

    pdf402p nguyenthai_thinh 16-03-2013 53 14   Download

  • In recent years, it was realized that the Multiple Input Multiple Output (MIMO) communication systems seems to be inevitable in accelerated evolution of high data rates applications. The MIMO systems, have received considerable att ention of researchers and commercial companies due to their potential to dramatically increase the spectral effi ciency and simultaneously sending individual information to the corresponding users in wireless systems.

    pdf0p 123859674 04-07-2012 51 14   Download

  • We are all witnesses that the beginning of the 21st century in technological terms is dedicated to mobile communications - they are everywhere: smartphones, Ipads, ereaders, and many other wireless devices. Once a fiction, today is a reality – music on demand, video on demand, live video conversation via IP on a tablet. What will be the next technological achievement that will have such huge impact on human living? I dare to predict that the second half of this century will by highly influenced by mobile robotics – robots will become ubiquitous décor in everyday life....

    pdf381p ktcn_1 17-07-2012 33 10   Download

  • Mobile Ad hoc Networks (MANETs) are a fundamental element of pervasive networks, where user can communicate anywhere, any time and on-the-fl y. MANETs introduce a new communication paradigm, which does not require a fi xed infrastructure - they rely on wireless terminals for routing and transport services. This edited volume covers the most advanced research and development in MANET. It seeks to provide an opportunity for readers to explore the emerging fi elds about MANET.

    pdf0p 123859674 04-07-2012 35 6   Download

  • Radio Frequency Identifi cation (RFID) is a modern wireless data transmission and reception technique for applications including automatic identifi cation, asset tracking and security surveillance. As barcodes and other means of identifi cation and asset tracking are inadequate for recent demands, RFID technology has att racted interest for applications such as logistics, supply chain management, asset tracking, and security access control.

    pdf294p ktcn_1 10-07-2012 25 6   Download

  • Wireless sensor networks promise an unprecedented fine-grained interface between the virtual and physical worlds. They are one of the most rapidly developing new information technologies, with applications in a wide range of fields including industrial process control, security and surveillance, environmental sensing, and structural health monitoring. This book is motivated by the urgent need to provide a comprehensive and organized survey of the field.

    pdf215p taurus23 02-08-2012 44 6   Download

  • Novel generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency . The 4th wireless uses Orthogonal Frequency Division Multiplexing, Ultra Wide Radio Band and millimeter wireless and smart antenna. Highly directive, planar UWB antennas are gaining more and more attention, as required in many novel and important applications.

    pdf0p 123859674 02-07-2012 44 5   Download

  • This book “Communications and Networking” focuses on the issues at the lowest two layers of communications and networking and provides recent research results on some of these issues. In particular, it fi rst introduces recent research results on many important issues at the physical layer and data link layer of communications and networking and then briefl y shows some results on some other important topics such as security and the application of wireless networks.

    pdf0p 123859674 04-07-2012 34 5   Download

  • This book has been prepared to present state of the art on WiMAX Technology. It has been constructed with the support of many researchers around the world, working on resource allocation, quality of service and WiMAX applications. Such many different works on WiMAX, show the great worldwide importance of WiMAX as a wireless broadband access technology.

    pdf0p 123859674 04-07-2012 30 5   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Feedback-Based Transmission for Wireless Networks with Energy and Secrecy Constraints

    pdf11p sting05 09-02-2012 14 4   Download

CHỦ ĐỀ BẠN MUỐN TÌM

Đồng bộ tài khoản