Anomalous Flow Profile due to the Curvature Effect on Slip Length

Einzel, Panzer, and Liu [Phys. Rev. Lett. 64, 2269 (1990)] suggest that the slip boundary condition for a fluid moving near a wall is modified by the radius of curvature of the surface. Using particle simulations of a microscopic flow between concentric cylinders we qualitatively confirm their prediction and point out that the effect is seen in a limiting case derived by Maxwell [Nature (London) 16, 244 (1877)].SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Smart mobility: a survey

Internet of Things (IoT) describes a world where everyday objects are always connected to the Internet, allowing them to communicate and interact with each other. By connecting these everyday objects to the Internet and making them available everywhere at any time, IoT allows to remotely monitor, manage, and gather status information about them and their surrounding environment. IoT is a revolutionary concept that brought new experiences to everyday life and enabled Smart City initiatives all over the world. These initiatives are using a combination of technology paired with physical infrastructure and services, to improve people's quality of life. One of the high-priority domain to support the Smart City's vision is the field of Smart Mobility. This paper reviews the current IoT approaches and concepts related to Smart Cities and Smart Mobility. In addition, it analyzes distinct features and numerous applications covering both Intelligent Transportation and Real Time Traffic Management Systems

Overview of context-sensitive technologies for well-being

Today smart devices such as smartphones, smartwatches and activity trackers are widely available and accepted in most developed societies. These devices present a broad set of sensors capable of extracting detailed information about different situations of daily life, which, if used for good, have the potential to improve the quality of life not only for individuals but also for the society in general. One of the key areas where this type of information can help to improve the quality of life is in healthcare since it allows to monitor and infer the current level of well-being of the smart devices carriers. In this paper, some of the available literature about well-being sensing through context-aware data is reviewed. Also, the main types of mechanisms used in these studies are identified. These mechanisms are related to monitoring, generalization, inference, feedback, energy management and privacy. Furthermore, a description of the mechanisms used in each study is presented.info:eu-repo/semantics/acceptedVersio

Otpadne vode industrije mleka

The problem of pollution and wastewater creation from dairy plants has not been adequately researched in our scientific journals. Problems of wastewater origin and purification were mostly considered. However, modern principles of sustainable development initiate wide aspect of environmental protection. In this way environmental protection becomes component of technological production process which leads to final goal, technology without waste. Sustainable development implies maximum rationalization of consumption of all natural resources, along with maximum recycling or processing in new technological procedures of all byproducts. It demands detail analysis of technological processes, whose goal is to establish critical phases for wastewater origin, prevention and reduction. In this paper, basic principles of production rationalization in dairy industry by applied methodology of critical points determination, waste material origination, waste prevention methods, as well as recycling possibility or waste processing were considered. Also, characteristic data of water consumption, wastewater origin and characteristics are given in this paper. Basic principles of water management and ways of overcoming wastewater problems were also considered.Problematici nastajanja i zagađivanja otpadnih voda u industriji mleka u domaćoj literaturi nije poklonjena zadovoljavajuća pažnja. Uglavnom su razmatrani problemi nastajanja i prećišćavanja otpadnih voda. Međutim savremeni principi održivog razvoja uvode širi aspekt zaštite životne sredine, kojim ona postaje sastavni deo tehnološkog postupka i koji vodi konačnom cilju, tehnologiji bez otpada. Održiv razvoj podrazumeva maksimalnu racionalizaciju potrošnje svih prirodnih resursa i maksimalnu reciklažu ili preradu u novim tehnološkim postupcima svih pratećih proizvoda. To zahteva detaljnu analizu tehnoloških postupaka s ciljem utvrđivanja kritičnih faza za nastajanje otpadnih proizvoda i sprovođenje mera radi sprečavanja ili smanjenja nastajanja otpada. Poštujući principe održivog razvoja, u ovom radu su razmotreni osnovni principi racionalizacije proizvodnje u industriji mleka primenom metodologije određivanja kritičnih tačaka nastajanja otpadnih materija, načina sprečavanja nastajanja otpada, kao i mogućnosti reciklaže ili prerade otpada, koji se ne može izbeći. U radu su takođe dati karakteristični podaci o potrošnji vode, nastajanju i karakteristikama otpadnih voda. Razmotreni su osnovni principi upravljanja vodom i načinima rešavanja problema otpadnih voda

Oscillatory behaviour in a lattice prey-predator system

Using Monte Carlo simulations we study a lattice model of a prey-predator system. We show that in the three-dimensional model populations of preys and predators exhibit coherent periodic oscillations but such a behaviour is absent in lower-dimensional models. Finite-size analysis indicate that amplitude of these oscillations is finite even in the thermodynamic limit. In our opinion, this is the first example of a microscopic model with stochastic dynamics which exhibits oscillatory behaviour without any external driving force. We suggest that oscillations in our model are induced by some kind of stochastic resonance.Comment: 7 pages, 10 figures, Phys.Rev.E (Nov. 1999

Consistency and Performance of Concurrent Interactive Database Applications

In many modern database applications, there is an emerging need for interactive environments where users directly manipulate the contents of the database. Graphical user interfaces (GUIs) display images of the database which must reflect a consistent up-to-date state of the data with minimum perceivable delay to the user. Moreover, the possibility of several applications concurrently displaying different views of the same database increases the overall system complexity. In this paper, we show how design, performance and concurrency issues can be addressed by adapting existing database techniques. We propose the use of suitable display schemas whose instances compose active views of the database, an extended client caching scheme which is expected to yield significant performance benefits and a locking mechanism that maintains consistency between the GUIs and the database. <BR

A benchmark for microRNA quantification algorithms using the OpenArray platform

miRcompData R package source. The source code for the miRcompData R package, also available at: http://bioconductor.org/packages/miRcompData/ . (GZ 8765 kb

Managing File Subsystem Data Streams for Databases on Networked Systems

One important activity for networked database systems that distribute data across several workstations is moving data between the file and network subsystems. It is possible to create data streams in the operating system kernel. If provided on a system, they allow user level processes to request transfer of data without having t copy it into the user space. This is particularly useful for data whose content or format is not modified during the transfer. In this paper we present a conservative criterion for access and control for the management of such data streams for databases in a networked environment, and define the implementation requirements for achieving the criterion. The approach is to maintain at least the current level of access management. We define the specific implementation semantics that this criterion entails. <P

Studying Real-time Traffic in Multi-hop Networks Using the EMANE Emulator: Capabilities and Limitations

In this paper, we study the fidelity of an open-source software emulator to provide reliable estimation of performance for real-time traffic in mobile ad-hoc networks. We emulate the IEEE 802.11 MAC/PHY (DCF) using the EMANE software emulator deployed on a cluster and run experiments for different multi-hop wireless scenarios with the Optimized Link State Routing (OLSR) protocol. As an instance of real-world usage scenario, we study the performance of real-time streaming media over a mesh network supported by OLSR. In particular, we study the effect of mobility and background traffic on carried load, delay and jitter. As another application, we analyze the impact of the wireless network on the self-similarity of aggregate traffic. Using traffic source models with high variability, we show that the aggregate traffic in the wireless network is self-similar and hence preserves its burstiness at larger time scales. The results are consistent with those obtained from high-fidelity simulation within some limitations of the emulator.Research supported by the US Army Research Office through MURI awards with numbers W911-NF-08-1-0238 and W911-NF-07-1-0287, and by the Defense Advanced Research Projects Agency (DARPA) under award number 013641-001 for the Multi-Scale Systems Center (MuSyC), through the FRCP of SRC and DARPA