An Experimental Study of Axial Flow Pump Cavitation

A qualitative study of the effects of cavitation on the performance of an axial flow pump was n1ade. Photographic evidence shows that cavitation need not occur first on the blade surface but could occur in the free stream. This phenomenon is ascribed to a flow through the tip clearance space. Cavitation similarity was found to be determined by the cavitation number K, Thoma's σ, or the suction specific speed S for the conditions of these tests

A people-oriented paradigm for smart cities

Most works in the literature agree on considering the Internet of Things (IoT) as the base technology to collect information related to smart cities. This information is usually offered as open data for its analysis, and to elaborate statistics or provide services which improve the management of the city, making it more efficient and more comfortable to live in. However, it is not possible to actually improve the quality of life of smart cities’ inhabitants if there is no direct information about them and their experiences. To address this problem, we propose using a social and mobile computation model, called the Internet of People (IoP) which empowers smartphones to recollect information about their users, analyze it to obtain knowledge about their habits, and provide this knowledge as a service creating a collaborative information network. Combining IoT and IoP, we allow the smart city to dynamically adapt its services to the needs of its citizens, promoting their welfare as the main objective of the city.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Preferences and attitudes towards açaí-based products among North American consumers.

Euterpe oleracea,Mart. is a palmtreewidely distributed in South America and the juicewhich is prepared fromits eatable pulp is popularly called ?açaí? in Brazil. It has a high nutritional value consisting mainly of fat, fiber and vitamin and minerals, but is also rich in anthocyanins, phenolic compounds and demonstrates high antioxidant capacity. The aimof this studywas to evaluate North American consumers' acceptance, intention to purchase and attitudes towards different açaí-based products available in theUS. Acceptance and purchase intention testswere carried out with 155 consumers for seven different açaí-based products. Demographics and attitudes were also measured in an exit survey. A sorbet, a juice and a smoothiewere themost liked products but purchase intentions were relatively low. Overall liking was driven by liking for flavor and aftertaste of the products. Consumers' segmentation based on acceptance revealed three groups, with a segment of açaí likers and another of dislikers. Most consumers had heard of açaí (83.9%) and 55.5% had tasted it before. Consumers knew açaí was healthy, nutritive, and rich in vitamins, minerals and antioxidants; however they did not know that açaí was oily, rich in fiber and that it may prevent degenerative diseases. Most participants showed low food neophobia (67.7%) and 51% scored high in general health interest. A promising market for açaí-based products among American consumers maybe women and health conscious consumers

The high burden of hospitalizations for primary EBV infection: a 6-year prospective survey in a French hospital

AbstractPrimary Epstein-Barr virus infection (PEI) is acquired increasingly later in life in developed countries, involving a growing number of adults. No studies have examined the effect of age on PEI. We conducted a prospective, single-centre, noninterventional survey to assess the clinical and economic effects of PEI care according to age. We included all serology-confirmed cases observed in all departments of a large regional hospital. Clinical and biologic data, therapeutics and costs of care were examined. Over a 6-year period, we included 292 subjects (148 children and 144 adults) with a median age of 15.4 years (range 9 months to 79 years). Adults were hospitalized more often (83% vs. 60%) and for longer periods of time (median 4 days vs. 2 days) than children (p ≤ 0.0001 for both). Two adults required a secondary transfer into the intensive care unit, although no children did. Typically, adults showed higher levels of activated lymphocytes and liver abnormalities. They also required the use of systemic corticosteroids more often (45% vs. 23%, p < 0.0001) and for longer periods of time (median 7 days vs. 3 days, p 0.02) than children. Overall, the costs were significantly higher for adults than for children (median, €1940 vs. €1130, p < 0.0001), mainly because of the frequency and duration of hospitalizations. Age increases the immune response and clinical severity of PEI, resulting in substantial additional costs for the community. Better recognition of the disease in adults could shorten the average length of hospital stay

Prikaz znanja u internetu stvari: semantičko modeliranje i njegove primjene

Semantic modelling provides a potential basis for interoperating among different systems and applications in the Internet of Things (IoT). However, current work has mostly focused on IoT resource management while not on the access and utilisation of information generated by the “Things”. We present the design of a comprehensive and lightweight semantic description model for knowledge representation in the IoT domain. The design follows the widely recognised best practices in knowledge engineering and ontology modelling. Users are allowed to extend the model by linking to external ontologies, knowledge bases or existing linked data. Scalable access to IoT services and resources is achieved through a distributed, semantic storage design. The usefulness of the model is also illustrated through an IoT service discovery method.Semantičko modeliranje pruža potencijalnu osnovu za me.udjelovanje različitih sustava i aplikacija unutar interneta stvari (IoT). Međutim, postojeći radovi uglavnom su fokusirani na upravljanje IoT resursima, ali ne i pristupu i korištenju informacija koje generira “stvar”. Predstavljamo projektiranje sveobuhvatnog i laganog semantičkog opisnog modela za prikaz znanja u IoT domeni. Projektiranje slijedi široko-priznate najbolje običaje u inženjerstvu znanja i ontološkom modeliranju. Korisnicima se dopušta proširenje modela povezivanjem na eksterne ontologije, baze znanja ili postoje će povezane podatke. Skalabilni pristup IoT uslugama i resursima postiže se kroz distribuirano, semantičko projektiranje pohrane. Upotrebljivost modela tako.er je ilustrirana kroz metodu pronalaska IoT usluga

A Feedback-Based Adaptive Service-Oriented Paradigm for the Internet of Things

© Springer International Publishing AG, part of Springer Nature 2018. With integrating physical devices into digital world, Internet of Things (IoT) have presented tremendous potential in various different application domains such as smart cities, intelligent transportation, smart home, healthcare and industrial automation. However, current IoT solutions and usage scenarios are still very limited because of the difficulty in sensing the context in continuously changing environments and adaptation to the changes accordingly. The complex dynamic interactions between system components and physical environments are a bit challenging especially when there are other concerns such as scalability and heterogeneity. To solve this problem, a novel adaptive service-oriented paradigm is proposed to support IoT from a low-level viewpoint. The paradigm can overcome some disadvantages of REST (Representational State Transfer) architecture style in the IoT. Two classical examples are illustrated using the proposed paradigm by adding an extra constraint based on REST to improve system states verification and enhance the functionality in modelling physical processes

REST4Mobile: A framework for enhanced usability of REST services on smartphones

Considering end-user research and proliferation of smartphones and REpresentational State Transfer (REST) interfaces, we envisage that smartphone owners can innovate to compose applications on the small screen. This paper presents the design and evaluation of a REST service development framework (viz, REST4Mobile) with the aim to enhance the usability when consuming on smartphones. Our design process uses the usability factors identified in our previous work as primary constraints for modeling the framework and a corresponding composition tool. Thus, sample REST services are developed with and then without the framework, and usability of composing the services on smartphones is evaluated. Evaluation was conducted by deploying the component REST services, the composition tool, and the resulting composite apps on a local machine. As the task of service composition is conducted directly on the smartphone's screen, the evaluation process is designed to be repeatable on remote servers and on the cloud. Results showed that constraints can be added into the REST architectural style on the basis of the influences of domain specific terms and human cognitive capabilities on the naming and size of the Uniform Resource Identifiers (URIs). In addition, the principles embodying the framework are found to be influential factors in enhancing the usability of REST services on smartphones