Wireless Sensor Networks hold the promise of delivering a smart communication
paradigm which enables setting up an intelligent network capable of handling
applications that evolve from user requirements. With the recent technological
advances of wireless sensor network, it is becoming an integral part of our lives.
However, due to the nature of wireless sensor networks, researchers face new
challenges related to the design of algorithms and protocols.
IPS-1 is an intrusion prevention system (IPS) that delivers protection from a wide-range of network threats
using an IPS-1 Sensor that can be placed either on the perimeter of your network or at any location in your
Some of the benefits of IPS-1 include:
Unified security management
Mission-critical protection against known and unknown attacks
Granular forensic analysis
This is a timely, readable and comprehensive survey of recent work in the area of mobile networks, providing a good background reader for students and practitioners alike. It highlights some of the opportunities and challenges that accompany the deployment of both current wireless LANs as well as next-generation mesh and multihop networks.
Insider attacks pose an often neglected threat scenario when
devising security mechanisms for emerging wireless technologies.
For example, traffic safety applications in vehicular
networks aim to prevent fatal collisions and preemptively
warn drivers of hazards along their path, thus preserving
numerous lives. Unmitigated attacks upon these networks
stand to severely jeopardize their adoption and limit the
scope of their deployment.
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....
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.
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.
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.
Manufacturing companies deploy sensors in their products to return a stream of telemetry.
Sometimes this is used to deliver services like OnStar, that delivers communications, security and
navigation services. Perhaps more importantly, this telemetry also reveals usage patterns, failure
rates and other opportunities for product improvement that can reduce development and
The proliferation of smart phones and other GPS devices offers advertisers an opportunity to
target consumers when they are in close proximity to a store, a coffee shop or a restaurant.
Making the Nation Safer: The Role of Science and Technology in Countering
Terrorism, a report released by the National Academies in June 2002,1
articulated the role of science and technology in countering terrorism.
That report included material on the specific role of information technology
(IT). Building on that report as a point of departure, the panel of
experts responsible for the IT material in Making the Nation Safer was
reconvened as the Committee on the Role of Information Technology in
Responding to Terrorism in order to develop the present report....
Regioregular polythiophene-based conductive copolymers with highly crystalline nanostructures are shown to hold considerable promise as
the active layer in volatile organic compound (VOC) chemresistor sensors. While the regioregular polythiophene polymer chain provides a
charge conduction path, its chemical sensing selectivity and sensitivity can be altered either by incorporating a second polymer to form a
block copolymer or by making a random copolymer of polythiophene with different alkyl side chains.
VSP techniques provide information in the
vicinity of the borehole. VSP is a class of seismic
measurements that can obtain high resolution
images near the wellbore (Hardage, 2000). VSP
acquisition utilizes sensors deployed within a
borehole and sources located at the surface, whereas
crosswell tomography uses sources and receivers
both deployed in boreholes. The advantage of
VSP, crosswell seismic, and other high resolution
methods is to obtain more precise estimations of
the CO2 induced effects on seismic properties.
Another use of mobility comes about if the specific
area of interest (within a larger area) is
unknown during deployment. For example, if a
network is deployed to monitor the migration of
a herd of animals, the herd’s
exact path through an area will
be unknown beforehand. But as
the herd moves, the sensors
could converge on it to get the
maximum amount of data. In addition, the sensors
could move such that they also maintain
complete coverage of their environment while
reacting to the events in that environment.
In addition to this exhaustive analysis, an estimation tool it has been built, since in most of the cases
the performance of a network can only be known after deployment in a particular environment. If some
problems are detected they will need to be solved in a second iteration. Therefore, an estimation tool
was considered relevant for these situations in order to guide the network designer, and also for the
selection of the furniture materials. In this work, we try to solve this problem by proposing a
Computer-Aided Design (CAD) software tool for non-expert users.
An organization must tell individuals why information about them is collected, how to contact the organization with inquiries or
complaints, what types of third parties the information will be disclosed to, and the options and means the organization provides
individuals to limit the use and disclosure of the information. Notice must be provided to individuals in clear language at the point when
individuals are ﬁrst asked to provide personal information or as soon thereafter as is practicable.
The development and deployment of NEMS and MEMS are critical to the U.S. economy and society because nano- and microtechnologies will lead to major breakthroughs in information technology and computers, medicine and health, manufacturing and transportation, power and energy systems, and avionics and national security.
Electrochemistry has been used extensively in the past three decades to
determine the chemical composition of environmental samples from the water
column, sediments, soils, biofilms, and microbial mats.
Coverage: In WSN, each sensor node is given a glimpse of the environment. This follows
are limited in range and accuracy (Figure 1), it can only include a limited physical area of
environment. Therefore, coverage is also an important design parameter in WSNs.
Each node receives a local view of its environment, limited by the scope and accuracy of it. the
coverage of a large area composed by the union of a number of smaller insurance.
Connectivity: Most of the high density of WSNs sensor, thus preventing the isolation of the nodes.
The proliferation of low-power and ultralow-power electronics has enabled a rapid
growth of autonomous devices that ranges from consumer electronics and nomad
devices to autonomous sensors and sensor networks used in industrial and military
environments. Hence, a wide range of application domains has been impacted by such
technologies (aeronautic, civil engineering,biomedical engineering, home automation,
In a variety of scenarios, often the only way to fully observe or monitor a situation is through the use of sensors. Sensors have been used in both civil and military applications, in order to extend the ﬁeld of view of the end-user. However, most current sensing systems consist of a few large macrosensors, which while being highly accurate are expensive. Macrosensor systems are highly sensitive; the entire system can break down even with one faulty sensor.