The maritime industry needs sustainable, low-emission fuels to reduce the environmental impact. Ammonia is one of most promising alternative because it can be produced from renewable energy, such as wind and solar. Furthermore, ammonia combustion does not emit carbon. This review article covers advantages disadvantages using a sustainable marine fuel. We start by discussing regulations concerns shipping sector, which responsible for around 2% 3% global energy-related CO2 emissions. These...

Excessive screen media use exposure is a robust childhood predictor of sedentary behavior. The association between excessive to behaviors (e.g., use) and motor skills how this differs across sociodemographic strata an important knowledge gap that needs be addressed. study aims investigate the in preschool children, taking into account variables, physical activity, sleep profile. A cross-sectional survey 926 children from 27 preschools was performed. main outcome defined as assessed using...

A renewed interest revolves around ammonia through its synthesis via renewable energy sources, promoting green as a genuine contender and preeminent carbon-free carrier within the hydrogen economy. National Hydrogen Strategy has already been set by Portuguese Government, focusing on decarbonizing national industry, while substantially reducing natural gas fossil fuel-based imports. This study delivers techno-economic assessment of small-scale production facility using biomass gasification in...

Ageing is a global phenomenon that in the last decades has led to significant inversion of ageing pyramid developed societies. This fact been introducing deep changes societies leading increase attention towards seniors' concerns and needs leverage appearance multiple gerontechnologies. In this context television as an enabler technology promising option for elderly, enabling serve population segment through features such distance help, support services promote social interaction or...

This study compared different strategies to improve occupational health and evaluated their impact on some quality of life domains (health, physical activity, environment, perception life). cluster randomized controlled clinical trial enrolled 172 men women aged 26.10 ± 6.03 who worked in the administrative department 4 companies. The interventions lasted three months. Employees company A (EA) received workplace exercises (WE) educational (EI) (posters with healthcare recommendations...

The use of distributed computing architectures has become commonplace in complex embedded systems with potential advantages, for example, terms scalability, dependability and maintainability. One particular area which that trend can be witnessed is mobile autonomous robotics several sensors actuators are interconnected by means a control network. In this paper we address one case study concerning the CAMBADA robots were developed at University Aveiro Robocup Middle Size League. These have...

The Message Queuing Telemetry Transport (MQTT) protocol is one of the most popular application-layer protocols for machine-to-machine communications. Its popularity results from its simplicity and effective publisher/subscriber messaging model, which allows lightweight implementations able to run on resource constrained devices, thus making this suitable (Industrial) Internet Things applications. However, MQTT's Quality-of-Service classes lack support real-time services, impairing adoption...

In safety-critical systems a global high-reliability is sought, including in the communication network when distributed control system used. The FlexRay protocol was developed within automotive industry with necessary characteristics to respond demands of applications, e.g. X-by-wire. Nevertheless, does not define mechanism guarantee message delivery, nor defines error signaling, leaving resolution these problems application. This paper presents preliminary proposal for that uses temporal...

A recent published newspaper article commented on the (lack of) quality of Brazilian science and its (in) efficiency. The was based a special issue Nature new resource for scientometrics called Index. I show here arguments sources bias that, under light principle in dubio pro reo, it is questionable to dispute efficiency these grounds, as referred article. brief overview provided readers make their own judgment.

This paper addresses the design, development and experimental tests of a prototype fuel gas generation system based on biomass gasification for small-scale applications, around 5 kW. It comprises small scale downdraft gasifier cleaning aiming to clean-up producer be used in upstream Internal Combustion Engine (ICE). The design follows methodologies that have been reported available literature. However, since these apply gasifiers with larger rated powers, adopted methodology is extrapolation...

The controller area network is still widely used as an embedded in safety critical applications, e.g. the automotive domain. However, requirements have changed and dependability bandwidth limitations led to emergence of alternative networks such FlexRay. Nevertheless there room improve CAN try fulfill current requirements. FTT-CAN supports multiple buses both provide bus media redundancy increase available bandwidth. architecture flexibility FTT based systems enables a tight yet flexible...

Controller Area Network is yet widely used as the embedded network in safety critical applications, e.g. automotive domain. However, requirements have changed and dependability bandwidth limitations led to emergence of alternative networks such FlexRay. Nevertheless there still room improve CAN try fulfill current requirements. In this paper it proposed use FTT-CAN achieve compromises between available fault tolerance based systems with multiple buses. The architecture flexibility FTT...

This paper presents a low cost, flexible and customizable delay measurement system developed to assess the performance of VTPE-hBEB protocol. The proposed can be used evaluate other communication protocols as well measure between two repetitive events.

The participatory design process aims to ensure that a product or service under development achieve the needs and expectations of its target population. This promotes highest levels accessibility, acceptance use developed solutions. is even more relevant when audience elderly. Interactive television applications can resolve some constrains seniors feel accessing informational content. So, this paper reports field work data collection analysis, aim define best way interrupt broadcast in an...

The development of small-scale power generation units based on biomass gasification is an effective mean to meet the growth interest deployment local exploiting endogenous renewable energy sources. However, significant research and activities are required towards cost-effective solutions suitable be used in several applications with different feedstock. For this purpose, a flexible experimental setup developed. This paper proposes critical review current state art available technologies for...