[EN] Smart cities provide new applications based on Internet of Things (loT) technology. Moreover, Software Defined Networks (SDNs) offer the possibility of controlling the network based on applications requirements. One ...
Cloud computing helps users and companies to share computing resources instead of having local servers or personal devices to handle the applications. Smart devices are becoming one of the main information processing ...
Underwater communications at low frequencies are characterized by the low data rate. But in some cases wireless sensors must be placed quite close to each other and need high data rates in order to accurately sense an ...
Sendra, Sandra; Parra Boronat, Lorena; Lloret, Jaime; Khan, Shafiullah(Hindawi Publishing Corporation, 2015)
In last decade, there have been many research works about wireless sensor networks (WSNs) focused on improving the network
performance as well as increasing the energy efficiency and communications effectiveness. Many of ...
[EN] According to World Health Organization (WHO) estimations, one out of five adults worldwide will be obese by 2025. Worldwide obesity has doubled since 1980. In fact, more than 1.9 billion adults (39%) of 18 years and ...
García Pineda, Miguel; Lloret, Jaime; Sendra Compte, Sandra; Rodrigues, Joel José Puga Coelho(Springer Verlag (Germany), 2011)
Several studies have demonstrated that communications are more efficient when cooperative group-based architectures are used in wireless sensor networks (WSN). This type of architecture allows increasing sensor nodes' ...
[EN] Aquaculture is a growing industry, and its sustainability is crucial. One of its major environmental impacts is the uneaten feed that pollutes the water. To minimize the uneaten feed, many systems have been developed. ...
Sendra, Sandra; Lloret, Jaime; Jimenez, Jose M.; Parra-Boronat, Lorena(Institute of Electrical and Electronics Engineers (IEEE), 2015-06-01)
Due to the growing interest using underwater acoustic networks, there are more and more research papers about underwater communications. These papers are mainly focused on deployments and studies about the constraints of ...
Sendra, Sandra; Lloret, Jaime; Jimenez, Jose M.; Ghafoor, Kayhan Zrar(Springer-Verlag, 2017)
[EN] Due to the high attenuation of the water at high frequencies, underwater communications in freshwater are not being investigated so much. Many current underwater communication systems are based on acoustic or optical ...
Sendra, Sandra; Lloret, Jaime; Jimenez, Jose M.; Rodrigues, Joel José Puga Coelho(MDPI, 2016-10)
Video surveillance is needed to control many activities performed in underwater environments. The use of wired media can be a problem since the material specially designed for underwater environments is very expensive. In ...
Sendra Compte, Sandra; Lloret, Jaime; Rodrigues, Joel J. P. C.; Aguiar, Javier M.(Institute of Electrical and Electronics Engineers (IEEE), 2013-09)
There are few equations for underwater communications
in the related literature. They show that the speed propagation
and absorption coefficient in freshwater are independent
of the working frequency of the transmitted ...
One of the main problems in underwater communications is the low data rate available due to the use of low frequencies. Moreover, there are many problems inherent to the medium such as reflections, refraction, energy ...
Marín, José; Parra-Boronat, Lorena; Rocher-Morant, Javier; Sendra, Sandra; Lloret, Jaime; Mauri Ablanque, Pedro Vicente; Masaguer, Alberto(Hindawi Limited, 2018)
[EN] Control over water usage for irrigation purposes is a key factor in order to achieve the sustainability in agriculture. The irrigation of urban lawns represents a high percentage of the urban water usage. The use of ...
Wireless Local Area Networks are important and
necessary in university campuses and large enterprise areas.
Such networks allow us to have data connection anywhere
without wires and many other benefits such as to obtain ...
[EN] Currently, there are several remote learning platforms based on video streaming. In most situations, these multimedia resources are displayed using smartphones that can be wirelessly connected to networks with deficient ...
Lloret, AT; Sendra, Sandra; Lloret, Jaime; Rey Tormos, Romina María del; Cereceda, Miguel Louis(MDPI AG, 2017)
[EN] The recreation of historical battles next to old buildings, walls, churches, fortifications or historical facades belonging to the historical heritage of a city, has always been a source of controversy and discussion. ...
An adequate wireless network plan is needed to replace the traditional wired LANs. A full coverage WLAN offers the flexibility to relocate people and equipment or to
reconfigure and add more wireless devices to the network. ...