The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To maximize spectrum access opportunities for white space devices, incorporating real-time spectrum sensing with geolocation database is a promising approach to enhance detection resolution. Advanced spectrum sensing techniques are needed to quickly and accurately identify spectrum occupancy over a wide frequency range. However, the stringent requirements from the wideband signal acquisition and processing...
We propose a method that uses long term information on the use of primary channels to select the most auspicious ones to be sensed and exploited by cognitive radios at the requesting time. These channels are investigated in more detail over the short term. Sensing results are stored in the short term database and used to predict which channels are best for data transmission. The method makes the operation...
Homelog is a continuous collection of digital records of various entities (including family members) about their existence states and activity experiences occurring in a home from the past to the present. The homelog can be regarded as a special home-oriented database whose data is captured automatically via various ubiquitous devices such as cameras, microphones, sensors, RFID tags, etc., which are...
This paper analyzed data features and configuration characteristics of digital mine, researched on its structure and system framework, discussed the principle and designed concept of the remote data services and data exchange, then built on the remote visualization model of digital mine information.We used SVG to describe structure data and real time data of monitoring based on plug-in technology,...
There is currently an undeniable increase of maritime goods exchanges. As a consequence, maritime threats and risks are also rising. Innovative solution has to be developed to improve the security of this huge economic activity. Future generation of maritime surveillance system should allow: permanent and all weather coverage of maritime border areas, continuous collection of heterogeneous data provided...
This paper presents the simulation environment for the EIDOS (equipment destined for orientation and safety) architecture applied to wildfire fighting operations. The development of this environment involves a multidisciplinary study, in which we have to handle several different types of information (geographical data, vegetation models, fire models, etc.) and devices (sensors, aerial vehicles, and...
This paper introduces monitoring network packets, which we will show differ substantially from conventional DBMS analysis. In many applications in the real world, data is not stored at a place (as in conventional DBMS) i.e. in this model, data does not take the form of persistent relations, but rather arrives in multiple, continuous, rapid, time-varying data streams. Almost all traffic analysis tasks...
Spacelog is a continuous collection of existence states and activity experiences of various entities in a physical environment, and it can be regarded as a special database or conceptually seen as a memory organ specifically for a real spatial site such as a home and a laboratory. Different from lifelog that is a personal database for a single individual, the entities in the spacelog cover multiple...
Flash memory is getting more popularity for its non-volatility, shock resistance, no mechanical delay and random access. Increasing size of flash memory as well as decrease in price has strengthened the possibility of replacing hard disk in near future. In this survey paper we discussed about the technological constraints of flash memory and how these problems has been solved so far. This survey paper...
Constant monitoring of the Exclusive Economic Zone cannot be performed only using high performance sensors. On the one hand, all available information on the observed area as juridical history of vessels or delineation of fishing zone is not necessarily measurable. On the other hand, even if the large amount of available information could be caught out they would be useless if none thorough sorting...
The 3 most important issues for anomaly detection based intrusion detection systems by using data mining methods are: feature selection, data value normalization, and the choice of data mining algorithms. In this paper, we study primarily the feature selection of network traffic and its impact on the detection rates. We use KDD CUP 1999 dataset as the sample for the study. We group the features of...
The complexity and variety of modern architectures bring lots of challenges in fire prevention and control. Advanced technologies and equipment, especially various kinds of establishments of communication, conducting and detection, provide a powerful support for fire control radically, but also bring about new problems in information coordination among dispersed knots of the fire control system, whose...
Sensors are used to monitor some physical phenomena such as contamination, climate, building, and so on. The sensors collect and communicate their readings to the sensor databases for making decisions and answering various user queries. Due to continuous changes and possible errors in these values, the data values recorded in sensor databases may differ from the actual status. Queries using these...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.