Sensors remote access

This is apparent in the case of industrial systems [6]0, which are making increasing use of the capabilities offered by open networks for remotely accessing sensors and actuators for their operation and maintenance. Control and supervision systems are typically embedded in other critical infrastructures electric power, potable water, oil and gas, railways, etc. The potential advantages from the economic and functional viewpoints are unquestionable less often studied are the risks that these connections might... 

Biometrics can be used in granting the remote access to the network. The scenario employs a common client-server network model, thus incorporating standard security mechanisms with biometric enhancements. The client terminal (see Figure 9) is a biometric-based host, equipped with the capturing device and the processing unit that measures the biometric trait and calculates the features vector (biometric template). The client capabilities may be understood in a wider sense, thus enabling the client to be equipped with sensors related to more than one biometric modality. The proposed access scenario enables to include the aliveness detection capability and the biometric replay attack prevention. To insert the necessary elements into the communication flow, capture-dependent parameters will be retrieved by the client terminal prior to the biometric trait measurement. 

Two of the primary applications for wireless data communications systems are to enable mobile or remote connections to a LAN, and to establish wireless communications links between SCADA remote telemetry units (RTUs) and sensors in the field. Wireless card connections are usually used for LAN access from mobile computers. Wireless cards can also be incorporated into RTUs to allow them to communicate with sensing devices that are located remotely. 

Capability of remote measurements. The small size of the fiber and its electrical, chemical, and thermal inertness allow long-term location of the sensor deep inside complex equipment and thereby provide access to difficult locations where temperature may be of interest. Beyond this, however, certain of the optical techniques allow noncontact or remote sensing of temperature. 

The scope of the tether-directed remote functionalization has been expanded from Cgo to the higher fullerene C70, and the described reactions are completely regioselective, featuring, in the case of C70, the kinetically disfavored addition pattern. The crown ether is a real template, since it can be readily removed by transesterification, giving a much-improved access to certain bis-adducts that are not accessible by the direct route. Cation-binding studies by CV reveal that cyclophane-type crown ethers derived from C60 and C70 form stable complexes with metal cations, and a perturbation of the fullerene reduction potentials occurs because the cation is tightly held close to the fullerene surface. This conclusion is of great importance for future developments of fullerene-based electrochemical ion sensors. 

Environment Sensors monitoring air and water quality will be able to provide early warning of pollution events arising at industrial plants, landfill sites, reservoirs, and water distribution systems at remote locations. The environmental nervous system concept likens the rapid access and response capabilities of widely distributed sensor networks to the human nervous system that is, it is able to detect and categorize events as they happen, and organize an appropriate response. 

The oscillation amplitude is too small (typically, 100 pm) to cause damage to the meter. Because the excitation current is also very small, intrinsically safe CMF versions are available for use in hazardous areas. The electronics can be mounted on the flowmeter directly, forming one compact unit, or the flowmeter can be interfaced to the electronics via a cable. The remote assembly may be necessary for high-temperature meters, or it may be convenient if the sensor is installed in a place that is not easily accessible. 

Chen, W., et al., 2011. Sensor integration for perinatology research. International Journal of Sensor Networks 9 (1), 38. Available at http //www.inderscience.com/link.php id=37303. CIDESI, 2014. Monitor Fetal Remote [Online] Available at http //www.conacyt.mx/agencia/ index.php/innovacion/103-cidesi-desarrolla-monitor-fetal-remoto-tecnologia-para-el-cuidado-de-la-salud-prenatal (accessed 05.09.14.). 

This article will concern itself only with devices that involve a chemical or biochemical transduction mechanism to generate the analytical information, with the processes occurring in a membrane or layer attached to the probe in such a manner that the analytical information can be accessed electronically from the outside world. This covers sensors that are for single use and for continuous monitoring because the basic chemistry and sensor configuration used are very similar for a particular application. Hence, the article does not cover techniques such as open-cell Fourier transform infrared or remote fiber spectroscopy, which can be used to sense the chemical nature of the environment without involving the use of a bona fide sensor. 

---