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In the next decades, hundreds of autonomous ships (AS) and Conventional ships (CS) will cross the Detroit of Gibraltar. For their autonomous operation, and remote control, these ships need to communicate with each other, with the vessel traffic system (VTS), with the port state control (PSC) and with the shore control centre (SCC). For a sustainable maritime industry, the biggest challenge will be...
Detecting precise location of aircraft during the entire flight duration is a challenge in the domain of commercial aviation. Using radar and other available technology, flights operating entirely over land can be tracked easily. However, with long haul intercontinental flights, where majority of the flight path is over water bodies and out of range of radar, detecting the location of aircraft at...
The paper deals with an analytical model of the transmitter-blocking technique for mitigating short-time fades on free-space optical links. Due to the effect of atmospheric turbulence, the optical channel is characterized by received power fades in the order of tens of milliseconds, during which the transmitted data is lost. Under certain conditions, the propagation through turbulent channel is reciprocal,...
This paper proposes a new battery management system (BMS) for a series string of battery cells. The proposed control structure is based on a duality of the adaptive droop control theory used in grid / microgrid connected sources. The presented BMS control structure yields higher reliability compared to the conventional ones due to its decentralization features and its communication-less ability. The...
For any n-bit boolean function f, we show that the randomized communication complexity of the composed function f o g^n, where g is an index gadget, is characterized by the randomized decision tree complexity of f. In particular, this means that many query complexity separations involving randomized models (e.g., classical vs. quantum) automatically imply analogous separations in communication complexity.
A program at Iowa State University, Make to Innovate (M:2:I), allows students to work on real world engineering problems through a problem-based learning framework. Over the five years this program has been operating, observational data and student feedback have been collected identifying a potential issue with students' success in their projects. In most cases, this was not due to a lack of technical...
The use of sensing technologies in industrial environments has opened many possibilities for monitoring and control applications, driving much research efforts in the last years. Among the challenging issues related to industrial wireless sensor networks, efficient nodes deployment is a major concern since it can directly impact the way sensors operate, which has demanded proper solutions. When sensing...
DC (Direct Current) microgrid has gained more attention caused by the development of distributed generations and DC loads. The control objectives for DC microgrid are voltage regulation and current sharing. In order to achieve these objectives, consensus based control methods with communication have been extensively studied recently. It is a common strategy to modify the voltage set point of local...
The rapid growth in market demands for high-quality, state-of-the-art, and reliable communication services increases the amount of session-control signaling, which is mainly based on the Session Initiation Protocol (SIP). Many research activities dealing with the Quality of Service (QoS) have been focused on media-related service components, whereas signaling-related service components have received...
This work is motivated by the need for the fundamental increase of spectral efficiency with the transmissions on the Transmission Control Protocol and the Internet Protocol (TCP/IP). To emphasize the work in physical layer, we define a bit-unit (BU) that is conceptually similar to an IP packet containing sufficient information for its destination node to identify the address and interpret the contents...
The communication of the homework assigned to elementary school students between teachers and parents is limited given that there are no electronic alternatives originated within the elementary schools in the State of Zacatecas México. Therefore the homework is a generally unknown activity for the parents. For this reason to improve the communication process between teachers and parents we developed...
In converters possessing multiple distributed controllers the synchronization of and the communication between the various controllers are important topics requiring careful consideration. The controllers should be able to transmit data and commands to each other so that different control modes can be selected, reference values updated, parameters shared and so forth. Synchronization is important...
This study examines e-Collaboration processes within temporary and ongoing virtual team by analyzing the level gaps of these processes according to the virtual team type. A quantitative test was carried out to compare the means gaps between the two virtual team types in five common collaboration processes. Then, employing a qualitative analysis, we constructed a conceptual model to understand the...
Suitably equipped air traffic can be tracked by decoding its Automatic Dependent Surveillance (ADS) Broadcast (ADS-B) signal. ADS is defined by initiatives in the U.S. through the NextGen program and in Europe through the SESAR program. ADS-B surveillance service in the U.S. comprises of the 1090 Extended Squitter (1090ES) that operates on 1090 MHz and the Universal Access Transceiver that operates...
Networked operations troop use communication and shared mental models to share situation awareness in combat. We propose a new networked operations troop situation awareness sharing model, which enables networked operations unit use analyzing current conditions to choose to communicate or share mental models achieve sharing situation awareness. Based on this, we establish a networked operations situation...
Smart grids are becoming practical nowadays with their integrated, complex and communicative architecture. The addition of renewable energy sources, control automation, information and communication technologies (ICT), advanced monitoring and protection and smart metering has further increased the complexity. Next generation smart grid will act as an interactive energy web with multi-way communication,...
Goal understanding and communication of requirements are vital for ensuring that large and complex project organizations collaborate efficiently. We have used a design science approach to explore and address the problem of communication for large IT projects. We designed a method for avoiding communication gaps by eliciting information regarding stakeholders and information flows. The MAPS (Mapping...
Internet connects all the people together, whereas the Internet of Things (IoT) connects all the tools together. Internet of Things is a technology in the health sector with a variety of applications. In this article we consider one of the IoT applications in ophthalmology. The optic nerve disorder and lack of blood supply to the eye can cause vascular disorders of vision and a slight blur to complete...
The paper presents telemetry system for stratospheric balloon mission based on the UHF transceivers designed for Internet of Things. The system operates in 869.5 MHz frequency band. The system uses very short packet without channel coding that can be successfully received and decoded under low signal to noise ratio. The modem sensitivity −124 dBm and the transmission power 25 dBm can ensure reliable...
Hybrid Microgrids are currently of great interest and are considered the distribution and transmission systems of the future, because they enable the coexistence of the AC microgrids and DC microgrids. This paper deals with the implementation of a new power management algorithm of the power converters that form part of the hybrid microgrid of Distributed Generation. The hybrid microgrid consists of...
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