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Wyniki wyszukiwania dla: mobile app
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International Journal of Mobile and Blended Learning
Czasopisma -
International Journal of Mobile Learning and Organisation
Czasopisma -
API warstwy pośredniczącej w środowisku J2EE. .
PublikacjaPrzedstawiono wybrane elementy środowiska J2EE związane z korzystaniem z bazy danych oraz systemu kolejkowego w warstwie pośredniczącej serwera aplikacyjnego. Opisano sposób korzystania z tych elementów oraz ich implementację w API serwera aplikacyjnego IBM WebSphere Application Server.
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Wave energy attenuation in fields of colliding ice floes – Part 2: A laboratory case study
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Compatible Mixture of Bacterial Antagonists Developed to Protect Potato Tubers from Soft Rot Caused by Pectobacterium spp. and Dickeya spp.
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Correction of determined coordinates of railway tracks in mobile satellite measurements
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Autonomous control of a mobile robot to explore areas with difficult terrain
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Method of data anomaly detection in the process of mobile applications installation
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Mobile navigation system for visually impaired users in the urban environment
PublikacjaThis paper describes the prototype version of a mobile application supporting independent movement of theblind. Its objective is to improve the quality of life of visually impaired people, providing them with navigationalassistance in urban areas. The authors present the most important modules of the application. The module forprecise positioning using DGPS data from the ASG-EUPOS network as well as enhancements of positioning...
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Advanced surveillance and operational communication system employing mobile terminals
PublikacjaDistributed surveillance and operational communications system based on XMPP protocol is presented. Its architecture and assumptions leading to the depicted design are shown. Features of XMPP protocol are portrayed with the emphasis on those most important in the context of the application. Real-time multimedia transmission with the use of Jingle/XMPP extension is discussed. The use of PDA-class computers as mobile terminals is...
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Mobile Systems (Portable, Handheld, Transportable) for Monitoring Air Pollution
PublikacjaThe monitoring and analysis of atmospheric air pollutants is a rapidly developing branch of analytical chemistry. The in situ analysis of atmospheric air quality using mobile instrumentation is becoming routine. The article provides information on devices used in various kinds of mobile laboratories. It reviews the portable gas chromatographs and handheld devices used for detecting and determining specific harmful substances in...
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A Point Set Connection Problem for Autonomous Mobile Robots in a Grid
PublikacjaConsider an orthogonal grid of streets and avenues in a Manhattan-like city populated by stationary sensor modules at some intersections and mobile robots that can serve as relays of information that the modules exchange, where both module-module and module-robot communication is limited to a straight line of sight within the grid. The robots are oblivious and move asynchronously. We present a distributed algorithm that, given...
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The Use of Mobile Devices in the Care and Home Monitoring of the Elderly and the Sick
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Using River Formation Dynamics Algorithm in Mobile Robot Navigation
PublikacjaRiver Formation Dynamics is a heuristic optimization algorithm based on the manner, in which drops of water form the river bed. The idea is to imitate the movement of drops on the edges between given nodes thus performing a search based on their height, which is modified through the mechanism of soil erosion and sediment deposition. In this way decreasing gradients are constructed, and these are followed by subsequent drops to...
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LCS efficiency methods of a mobile terminal in monitoring system applications
PublikacjaW artykule zostały zaprezentowane nowe metody lokalizowania terminala ruchomego w asynchronicznych sieciach komórkowych trzeciej generacji. Przedstawiono opis zastosowanego modelu symulacyjnego oraz wyniki badań symulacyjnych w środowisku tzw. złym miejskim.
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An untraceability protocol for mobile agents and its enhanced security study
PublikacjaArtykuł przedstawia rozszerzoną analizę bezpieczeństwa zaproponowanego przez nas protokołu ochrony przed tropieniem (ang. untraceability protocol) dla agentów mobilnych. Jak dotąd, tak systematyczna analiza bezpieczeństwa nie została przeprowadzona. Co więcej, istniejące znane analizy bezpieczeństwa koncentrują się wyłącznie na atakujących wewnętrznych. Uważamy, że stworzona przez nas lista kontrolna ataków może posłużyć jako...
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Distributed reputation system for multihop mobile ad hoc networks
PublikacjaZaproponowano system reputacyjny dla bezprzewodowej sieci rozległej ad hoc, pozwalający stacjm sieci zachować tzw. anonimowość pakietową oraz odróżniać zachowania niekoperacyjne od efektów przeciążenia sieci. Zastosowano generację miar reputacyjnych przy wykorzystaniu mechanizmu lokalnego nasłuchiwania (watchdog). Przeprowadzono symulacyjne badania odporności tego systemu na obecność stacji niewspółpracujących.
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Measurements of acoustic crosstalk cancellation efficiency in mobile listening conditions
PublikacjaThe cancellation of acoustic crosstalk is employed to enhance the stereo image in mobile listening conditions. The implementation of the crosstalk cancellation algorithm in Matlab is introduced. The measurement signals and equipment are described. A practical setup employing a mobile computer and a head and torso simulator is employed. The results of the measurements provided conclusions regarding the employment of acoustic crosstalk...
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Dynamic host configuration protocol for IPv6 improvements for mobile nodes
PublikacjaIn wireless networks mobile clients change their physical location, which results in changing point of attachment to the network. Such handovers introduce unwanted periods, when node does not have communication capabilities. Depending on many conditions, such events may require reconfiguration of layer 2 (e.g. IEEE 802.16) or both 2 and 3 layers (IPv6). This paper investigates delays introduced in the latter type of handover. IPv6...
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Health monitoring services based on off-the-shelf mobile devices
PublikacjaDevelopment of health monitoring systems usually involves usage of dedicated devices with provided guarantees in terms of their reliability. Those devices raise the cost of the whole system, because of which such platforms are limited only to specific areas and constrained number of users. Usage of off-the- shelf devices could lower the cost and bring those systems to the masses. The paper covers possible uses of common off-the-shelf...
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Quantum strategies for rendezvous and domination tasks on graphs with mobile agents
PublikacjaThis paper explores the application of quantum nonlocality, a renowned and unique phenomenon acknowledged as a valuable resource. Focusing on an alternative application, we demonstrate its quantum advantage for mobile agents engaged in specific distributed tasks without communication. The research addresses the significant challenge of rendezvous on graphs and introduces a distributed task for mobile agents grounded in the graph...
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Concept of the mobile monitoring system for chemical agents control in the air
PublikacjaW artykule przedstawiono koncepcję mobilnego systemu monitoringu związków chemicznych zanieczyszczających powietrze. Nowością w przedstawionej koncepcji monitoringu jest pomiar zanieczyszczeń powietrza wzdłuż ciągów komunikacyjnych, co do tej pory nie jest realizowane. W tym celu przedstawiono propozycję rozwiązania stosunkowo małego, bezobsługowego modułu do pomiarów związków chemicznych, który z łatwością będzie montowany na...
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A framework for detection of selfishness in multihop mobile ad hoc networks
PublikacjaThe paper discusses the need for a fully-distributed selfishness detection mechanism dedicated for multihop wireless ad hoc networks which nodes may exhibit selfish forwarding behaviour. The main contribution of this paper is an introduction to a novel approach for detecting and coping with the selfish nodes. Paper describes a new framework based on Dempster-Shafer Theory called Dempster-Shafer Theory-based Selfishness Detection...
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Music genre classification applied to bass enhancement for mobile technology
PublikacjaThe aim of this paper is to present a novel approach to the Virtual Bass Synthesis (VBS) algorithms applied to portable computers. The proposed algorithm is related to intelligent, rule-based setting of synthesis parameters according to music genre of an audio excerpt. The classification of music genres is automatically executed employing MPEG 7 parameters and the Principal Component Analysis method applied to reduce information...
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Mobile Activity Plan Applications for Behavioral Therapy of Autistic Children
PublikacjaThis paper concerns technological support for behavioral therapy of autistic children. A family of tools dedicated for mobile devices is presented, that allows to design and perform an activity schedule in behavioral therapy. The paper describes the main challenges, that were encountered, especially in meeting the non-functional requirements of the application: simplicity, repeatability, robustness, personalization, re-usability...
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Evaluation of Respiration Rate Using Thermal Imaging in Mobile Conditions
PublikacjaRespiratory rate is very important vital sign that should be measured and documented in many medical situations. The remote measurement of respiration rate can be especially valuable for medical screening purposes (e.g. severe acute respiratory syndrome (SARS), pandemic influenza, etc.). In this chapter we present a review of many different studies focused on the measurements and estimation of respiration rate using thermal imaging...
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Investigation method of large-volume tire with mobile test rig
PublikacjaThe goal of this research is to develop the tire test method and mobile tire test rig. The test rig enables measurement of tire properties as stiffness and viscous damping in vertical direction, and tire–ground characteristics on the asphalt rigid surface. The tire-ground characteristics are measured by force and a torque measurement hub. The design, calibration and the algorithm for calculating the forces in the wheel center are...
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Modelling and Analysis of the Positioning Accuracy in the Loading Systems of Mobile Cranes
PublikacjaIn this work, the authors analyse the influence of the order and range of sequential movements of a crane's working members on the accuracy of the final cargo positioning. The analysis was conducted on the basis of a specially developed method in which the authors proposed the introduction of a geometrical indicator of positioning the load in the intermediate positions (after completing each movement sequence) and in the target...
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A Review of Traffic Analysis Attacks and Countermeasures in Mobile Agents' Networks
PublikacjaFor traditional, message-based communication, traffic analysis has been already studied for over three decades and during that time various attacks have been recognised. As far as mobile agents’ networks are concerned only a few, specific-scope studies have been conducted. This leaves a gap that needs to be addressed as nowadays, in the era of Big Data, the Internet of Things, Smart Infrastructures and growing concerns for privacy,...
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Evaluation of Street Lighting Efficiency Using a Mobile Measurement System
PublikacjaThe issue concerns the initial stage of work on a method for performing a rapid assessment of the energy efficiency and illuminance of a street lighting installation. The proposed method is based on simultaneous measurement of illuminance from three lux meters placed on the roof of the vehicle. The data are acquired in road traffic, while the vehicle is driving. The proposed solution will allow in the future to quickly and reproducibly...
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Auto adaptation of mobile device characteristics to various acoustic conditions
PublikacjaThe proposed methodology of auto adaptation of the mobile device characteristics to various acoustic conditions is presented in the paper. The first goal of this study was to determine the parameters of the acoustic path of the mobile device, for both transmitting (speaker) and receiver (microphone). Results of the measurement of characteristics of mobile devices were presented. Information about characteristics of individual parts...
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Correction of determined coordinates of railway tracks in mobile satellite measurements
PublikacjaThis article examines one of the basic issues related to the technique of mobile satellite measurements in railway tracks. This problem concerns the correction of the determined coordinates of the track centerline. The need to perform this operation results from the GNSS receivers positioning at a certain height above the level of the existing track axis, leading to longitudinal and lateral shifts of antennas. The key problem here...
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An IoT-Based Computational Framework for Healthcare Monitoring in Mobile Environments
PublikacjaThe new Internet of Things paradigm allows for small devices with sensing, processing and communication capabilities to be designed, which enable the development of sensors, embedded devices and other ‘things’ ready to understand the environment. In this paper, a distributed framework based on the internet of things paradigm is proposed for monitoring human biomedical signals in activities involving physical exertion. The main...
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Collaborative Delivery by Energy-Sharing Low-Power Mobile Robots
PublikacjaWe study two variants of delivery problems for mobile robots sharing energy. Each mobile robot can store at any given moment at most two units of energy, and whenever two robots are at the same location, they can transfer energy between each other, respecting the maximum capacity. The robots operate in a simple graph and initially each robot has two units of energy. A single edge traversal by an robot reduces its energy by one...
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Mobile devices and computing cloud resources allocation for interactive applications
PublikacjaUsing mobile devices such as smartphones or iPads for various interactive applications is currently very common. In the case of complex applications, e.g. chess games, the capabilities of these devices are insufficient to run the application in real time. One of the solutions is to use cloud computing. However, there is an optimization problem of mobile device and cloud resources allocation. An iterative heuristic algorithm for...
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Wave-induced stress and breaking of sea ice in a coupled hydrodynamic–discrete-element wave–ice model
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Wave-induced stress and breaking of sea ice in a coupled hydrodynamic–discrete-element wave–ice model
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Wave-induced stress and breaking of sea ice in a coupled hydrodynamic–discrete-element wave–ice model
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Use of the AHP Method for Preference Determination in Yacht Design
PublikacjaA sailing yacht is a human-centred product, the design of which revolves primarily around the wants and desires of the future owner. In most cases, these preferences are not measurable, such as a personal aesthetic feeling, or a need for comfort, speed, safety etc. The aims of this paper are to demonstrate that these preferences can be classified and represented numerically, and to show that they are correlated with the type...
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Preprocesor graficzny ATPDRAW dla programu symulacyjnego ATP.
PublikacjaPrzedstawiono program ATPDraw, który jest preprocesorem graficznym dla programu ATP przeznaczonego do obliczania stanów przejściowych w obwodach elektrycznych. Opracowanie preprocesora znacznie ułatwiło tworzenie modelu symulowanego układu. Model jest tworzony w dużo czytelniejszej niż tekstowa formie graficznej. ATPDraw umożliwia stworzenie w prosty sposób łatwej do wykorzystania biblioteki własnych modeli obiektów i zjawisk....
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Analysis of transformer state by fuzzy TOPSIS and AHP method
PublikacjaThe paper presents mathematical models TOPSIS and AHP methods, which was utilized on insulating state of distribution transformer to analyze and sensibility of individual measurements methods mutual comparison. We can uniquely determine the importance of these measurements methods with this mathematical apparatus in these measurements methods in insulating state of transformers.
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Use of the AHP Method for Preference Determination in Yacht Design
PublikacjaA sailing yacht is a human-centred product, the design of which revolves primarily around the wants and desires of the future owner. In most cases, these preferences are not measurable, such as a personal aesthetic feeling, or a need for comfort, speed, safety etc. The aims of this paper are to demonstrate that these preferences can be classified and represented numerically, and to show that they are correlated with the type of...
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Quasi-controlled Experimentations on the Impact of AOP on Software Comprehensibility
PublikacjaAspect-oriented programming (AOP) emerged as a paradigm to modularize the concerns that lead to interwoven code if implemented using traditional programming techniques. Unfortunately, the new constructs introduced by aspect-oriented (AO) languages result in both: (1) obstacles in modular reasoning, and (2) high coupling between aspects and the augmented modules. There have been numerous attempts to tackle these issues, but none...
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Investigation of OSL signal of resistors from mobile phones for accidental dosimetry
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Prediction of the stability during optimal control of the 3-wheel mobile platform
PublikacjaW pracy przedstawiono metodę badania stabilności sterowania optymalnego 3-kołową platformą mobilną podczas realizacji zadanej trajektorii ruchu. Badany robot posiada więzy nieholonomiczne. Model matematyczny robota 3-kołowego opisano za pomocą skończonej liczby nieliniowych równań różniczkowych. Stąd, prognozowanie ruchu takiego obiektu wymaga zastosowania efektywnych algorytmów.
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Determining horizontal curvature of railway track axis in mobile satellite measurements
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Installation of GNSS receivers on a mobile railway platform – methodology and measurement aspects
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Distributed MIND - A New Processing Model Based on Mobile Interactive Documents
PublikacjaObliczenia w trybie zespołowym pozwalają na integrację działań ludzi i agentów systemowych w otwartym środowisku rozproszonym w celu rozwiązywania problemów formułowanych dynamicznie w trakcie pracy systemu. Problemy te najczęściej nie mają charakteru algorytmicznego, tzn. generowane rozwiązania nie mogłyby zostać wyliczone w skończonej liczbie kroków na podstawie danych charakteryzujących uczestników obliczeń. Autorzy proponują...
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Performance analysis of untraceability protocols for mobile agents using an adaptable framework
PublikacjaArtykuł przedstawia środowisko oceny wydajności protokołów ochrony przed tropieniem agentów mobilnych oraz wyniki analiz przeprowadzonych za jego pomocą. Chociaż środowisko projektowano i implementowano z myślą o ewaluacji zaproponowanych przez nas protokołów ochrony przed tropieniem, w trakcie badań okazało się, że może ono zostać również wykorzystane do badań całej klasy protokołów bezpieczeństwa dla agentów mobilnych. Chodzi...
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Badanie sprawności algorytmów szeregowania danych w systemie WiMAX Mobile
PublikacjaW pracy przedstawiono wyniki badań symulacyj-nych różnych metod szeregowania danych i przydziału podnośnych w sieciach opartych na standardzie IEEE 802.16e (WiMAX Mobile). W pracy zostały opisane najważniejsze mechanizmy odpowiedzialne za zarządza-nie jakością usług w tych sieciach. Analizę porównaw-czą przeprowadzono dla następujących metod: Round Robin (RR), Proportional Fairness (PF) oraz Maximum Rate (MR). Znaczną uwagę poświęcono...