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Wyniki wyszukiwania dla: quality of service (qos)
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Automatic Watercraft Recognition and Identification on Water Areas Covered by Video Monitoring as Extension for Sea and River Traffic Supervision Systems
PublikacjaThe article presents the watercraft recognition and identification system as an extension for the presently used visual water area monitoring systems, such as VTS (Vessel Traffic Service) or RIS (River Information Service). The watercraft identification systems (AIS - Automatic Identification Systems) which are presently used in both sea and inland navigation require purchase and installation of relatively expensive transceivers...
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Serwer Diameter w architekturze Proxy Mobile IPv6
PublikacjaW pracy przedstawiono mechanizmy współpracy serwera Diameter z systemem Proxy Mobile IPv6. Opisany został sposób integracji obu rozwiązań na potrzeby obsługi mobilności terminali ruchomych w sieci IPv6. W ramach realizowanych badań wykonano implementację opisanego systemu. Dla przygotowanej implementacji przeprowadzono szereg testów wydajnościowych uwzględniających parametry jakości QoS oraz QoE.
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Transformation of the countryside into an open-air museum as a way to rescure its spatial layout and to improve the quality of live = Przekształcenie wsi w muzeum na wolnym powietrzu jako sposób ratowania jej układu przestrzennego i poprawy jakości życia mieszkańców
PublikacjaSince the first open-air museums until today, the exposition subject-matter has been specialized (ethnographic, archeological, industrial and technical skansens). But idea of the existence of such objects remains unchanged. Still, the goal is to show the collection of wooden buildings in the environment as close to their origin as possible or in the home environment. These distinguish the skansens and make them different then municipal...
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Sieci z protokołem SIP a gwarancja poziomu oraz jakości usług
PublikacjaW pracy przedstawiono problem zapewnienia odpowiednio wysokich wartości parametrów GoS oraz QoS w sieciach z protokołem SIP, z uwzględnieniem szczególnych cech protokołu takich, jak np. mechanizm transakcji. Następnie zaprezentowano szereg różnorodnych prób rozwiązania tego problemu. W opisie zwrócono uwagę na takie aspekty jak: obsługa protokołu SIP w sieci DiffServ (SIP-Q), konwergencja sieci SIP i PSTN (SIP-T), wykorzystanie...
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C2 Niwa - The Centre of Competence for Novel Infrastructure of Workable Applications
PublikacjaScientific and cloud computing are discussed in the paper . The paradigm of EaaS (Everything as a Service) is presented and the design methodology of service oriented applications is proposed. Implementation of the SOSE (Software Oriented Software Engineering) approach is analyzed and the roles of developing teams to obtain software products satisfying business requirements are also shown. The above listed activities create a basic...
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Analiza wymagań jakościowych dla usług przesyłania danych w systemie RSMAD
PublikacjaW referacie przedstawiono analizę wymagań jakościowych (określonychpoprzez atrybuty QoS) dla usług transmisji danych obrazowych z wykorzystaniem Radiowego Systemu Monitorowania i Akwizycji Danych z Urządzeń Fotoradarowych (w skrócie RSMAD). Ponadto przedstawiono wyniki badań symulacyjnych przeprowadzonych w celu określenia przydatności różnych systemów radiokomunikacyjnych do transmisji danych w tym systemie z wymaganą jakością.
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eLearning im Wandel der Zeit am Beispiel der TU Gdansk und der FH Flensburg
PublikacjaW referacie omówiono zmiany systemów eLearning na przykładzie ich rozwoju na Politechnice Gdańskiej i w Wyższej Szkole Zawodowej we Flensburgu. Dokonano analizy pierwszych rozwiązań, w tym własnych systemów i narzędzi, jak również dokonanego na obu uczelniach zwrotu w kierunku otwartych systemów LMS. Podkreślono rolę oceny jakości(QoS) systemów zdalnego nauczania.
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POPRAWA OBIEKTYWNYCH WSKAŹNIKÓW JAKOŚCI MOWY W WARUNKACH HAŁASU
PublikacjaCelem pracy jest modyfikacja sygnału mowy, aby uzyskać zwiększenie poprawy obiektywnych wskaźników jakości mowy po zmiksowaniu sygnału użytecznego z szumem bądź z sygnałem zakłócającym. Wykonane modyfikacje sygnału bazują na cechach mowy lombardzkiej, a w szczególności na efekcie podniesienia częstotliwości podstawowej F0. Sesja nagraniowa obejmowała zestawy słów i zdań w języku polskim, nagrane w warunkach ciszy, jak również w...
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ON EGNOS MONITORING IN LOCAL CONDITIONS
PublikacjaAny SBAS system should deliver to the user corrections to pseudoranges as well as information about the system integrity. In theory, as soon as the system is permanently monitored by RIMS stations, it is impossible to deliver the fault information to the user. However many observations shows that accuracy of EGNOS service in the same time are different in different places, which shows the influence of local conditions on them....
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The effects of relational and psychological capital on work engagement: the mediation of learning goal orientation
PublikacjaPurpose – This paper proposes a research model in which learning goal orientation (LGO) mediates the impacts of relational capital and psychological capital (PsyCap) on work engagement. Design/methodology/approach – Data obtained from 475 managers and employees in the manufacturing and service industries in Poland were utilized to assess the linkages given above. Common method variance was controlled by the unmeasured latent method...
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Discovery of Stylistic Patterns in Business Process Textual Descriptions: IT Ticket Case
PublikacjaGrowing IT complexity and related problems, which are reflected in IT tickets,create a need for new qualitative approaches. The goal isto automate the extraction of main topics described in tickets in order to provide high quality support for the IT process workers and enablea smooth service delivery to the end user. Present paper proposes a method of knowledge extraction in a form of stylistic patterns in business...
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Practice implementation of operational level agreement
PublikacjaThe paper concerns practical implementation of the Operational Level Agreement (OLA) compared to the Service Level Agreement (SLA).
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Failure analysis of the exhaust valve face in diesel marine engine
PublikacjaThe exhaust valve from marine diesel engine which was damaged after 2000 hours of service was investigated. In order to prolong the service time the valve face was cladded with cobalt base alloy using laser technique. After failure microstructural and chemical analyses reviled that cladding process was conducted improperly. The chemical composition of the clad layer was far from the designed one and what more completely inhomogeneous....
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SSE PLATFORM APPLICATION TO EXTEND OPERATIONABILITY OF WEB-GIS BASED MARINE SERVICES OF AN HRPT-METOP SATELLITE GROUND STATION
PublikacjaEarth Observation (EO) products are widely used by geospatial society. Over the last years a number of new applications of satellite imagery were proposed. This led to an increased interest in EO products, not only from researchers but also from companies and individuals. The authors constitute the essential part of the team that created the marine, web-GIS system - SafeCity GIS - for dissemination of data obtained from a 1.5 metre...
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METHOD TO EXTEND OPERATIONABILITY OF WEB-GIS BASED MARINE SERVICES USING SSE PLATFORM
PublikacjaEarth Observation (EO) products are widely used by geospatial society. Over the last years a number of new applications of satellite imagery were proposed. This led to an increased interest in EO products, not only from researchers but also from companies and individuals. The authors constitute the essential part of the team that created the marine, web-GIS system - SafeCity GIS - for dissemination of data obtained from a 1.5...
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A hybrid-mesh solution for coverage issues in WiMAX metropolitan area networks.
PublikacjaThe new WiMAX technology offers several advantages over the currently available (GSM or UMTS-based) solutions. It is a cost effective, evolving, and robust technology providing quality of service guarantees, high reliability, wide coverage and non-line-of-sight (NLOS) transmission capabilities. All these features make it particularly suitable for densely populated urban environments. In this paper we discuss the design and implementation...
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New Challenges in Management and Economics in 21st century. Selected studies and examples
PublikacjaIn Chapter 1 authors describe the method used to assess the level of readiness of an organization to introduce the Lean Six Sigma concept supporting the Quality 4.0 assumptions, which is gaining more and more interest not only in large organizations, but also in the SME sector. Its use will be illustrated by the example of a small service company. Chapter 2 presents the characteristics of blockchain technology applications in the...
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Ocena wspierania przez protokół IPv6 transmisji multimedialnych
PublikacjaW pracy pokazano, że protokół IPv6 będący następcą IPv4 zapewnia nieznacznie większe możliwości realizacji usług QoS. Dzięki polom nagłówka datagramu IPV6 definiuje zarówno klasę usług, do jakiej należy dany datagram, jak też priorytety przesyłania danego datagramu. Dodatkowo routery są zobowiązane do przetwarzania datagramów z określonymi klasami usług jak i priorytetami. Łącząc IPv6 z protokołem RSVP można uzyskać minimalne...
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Elements of six sigma methodoloygy in polish smes. the pomeranian region context
PublikacjaIn this article, it has been suggested that the effectiveness of the design and implementation of the process approach in the SMEs sector affects the effectiveness and efficiency of the application of elements of the Six Sigma ™ concept. The selected results of the research have been presented to answer the question to what extent small and medium-sized manufacturing, service and production - service companies in Pomeranian region...
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Schematiclab.com – A web tool for the design and analysis of electrical circuits
PublikacjaAlong with a general progress in the modern computational tools, dynamic development of Internet applications using the cloud methodology and solutions is now observed. Clearly, also the applications installed locally, and being commonly used previously, are gradually gaining their counterparts in computational network clouds. The clouds have also brought new service sales opportunities. Namely, the service sales model based on...
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DIAGNOSES MADE BY LEADERS OF EMERGENCY MEDICA L SERVICES TEAMS WITHIN THE OPERAT ION AREA OF THE EMERGENCY MEDICA L SERVICES STAT ION IN MINSK MAZOWIECKI IN 2013-2017
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LIFE-SAVING PROCEDURES AND CARDIOPULMONARY RESUSCITATION FROM THE ANCIENT HISTORY TO THE PRESENT DAY
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Network Protection Against Node Attacks Based on Probabilistic Availability Measures
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NEEDS AND CHALLENGES IN DISPATCHING EMERGENCY MEDICAL SERVICES IN SITUATIONS OF POTENTIAL MILITARY DANGER
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Volunteering in the front line of the Ukrainian refugee crisis. A brief report from Poland
PublikacjaThis study aims to analyse the experiences and motivations of volunteers who supported Ukrainian refugees who fled to Poland. Our study was conducted among 196 volunteers in Poznan, Poland who answered questions regarding their experiences with voluntary service during the current refugee crisis and the reasons they became involved in volunteer efforts.We found that although the Polish state had no prior experience in welcoming...
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Trends shaping innovations in the aerosol market
PublikacjaNew hygiene regimes and sustainability commitments are helping to shape the aerosol market. Norbert Piotrowski of Aerosol Service Poland explains the thinking behind the company’s latest hygiene innovations.
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Analysis of the cyclic load-unload-reload tests of VALMEX aged fabric
PublikacjaThe paper presents mechanical response of the VALMEX fabric during the cyclic loading-unloading and re-loading experiments. Two types of the aged material used for nearly 20 years as the roofing of the Forest Opera in Sopot (Poland) have been tested. The results have been separately obtained for the warp and fill di-rections. The comparative analysis has revealed that the material aged in service is more durable in the fill di-rection,...
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EGNOS-based GNSS receiver for precise positioning in restricted areas
PublikacjaPositioning accuracy is very important in many areas, whereas the typical GPS receiver accuracy is often not sufficient. The European Geostationary Navigation Overlay Service (EGNOS), Europe’s first venture into satellite navigation, improves the open public service offered by the Global Positioning System (GPS). As a satellite navigation augmentation system, EGNOS improves the accuracy of GPS by providing a positioning accuracy...
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APIS – Agent Platform for Integration of Services
PublikacjaThe paper presents an approach to creating the platform for development and evaluation of complex tasks execution algorithms. Proposed solution is based on an agent paradigm where independent peers can cooperate and negotiate in order to execute specified tasks which are defined only by the final output description. Tasks are realized by the means of services exposed by different peers. In case when there is no single service fulfilling...
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Zapewnianie wiarygodnosci przetwarzania przy integracji komponentów usług
PublikacjaPrzedstawiono problematykę Service Oriented Architecture(SOA) oraz nowoczesne metodologie integracji gotowych komponentów programistycznych.Omówiono Service Component Architecture (SCA), Cloud computing, oraz modelowanie procesów biznesowych jako metodologie zbliżone koncepcyjne do SOA. Opisano główne atrybuty wiarygodności i zestawionokonkretne techniki poprawy wiarygodno±ci. Modelowanie procesów biznesowychzaprezentowano na przykładzie...
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The concept of aida applied to online interactive advertisement: an youtube case study
PublikacjaThis paper presents an approach of application of the AIDA framework to interactive advertisements presented on social media channels. The first section introduces the definitions of social media and its categorization. It is given an overview of the online video service YouTube.com. The second section describes social media marketing. The third section presents a theoretical introduction of traditional and interactive advertisement....
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Using Statistical Methods to Estimate The Worst Case Response Time of Network Software Running on Indeterministic Hardware Platforms
PublikacjaIn this paper we investigate whether the statistical Worst Case Execution Time (WCET) estimation methods devised for embedded platforms can be successfully applied to find the Worst Case Response Time (WCRT) of a network application running on a complex hardware platform such as a contemporary commercial off-the-shelf (COTS) system. Establishing easy-to-use timing validation techniques is crucial for real-time applications and...
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Selection of an artificial pre-training neural network for the classification of inland vessels based on their images
PublikacjaArtificial neural networks (ANN) are the most commonly used algorithms for image classification problems. An image classifier takes an image or video as input and classifies it into one of the possible categories that it was trained to identify. They are applied in various areas such as security, defense, healthcare, biology, forensics, communication, etc. There is no need to create one’s own ANN because there are several pre-trained...
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Factors affecting low-temperature cracking of asphalt pavements: analysis of field observations using the ordered logistic model
PublikacjaAccurate identification of factors that primarily affect the number of low-temperature cracks is crucial for selection of road materials and planning of pavement maintenance. Field investigations of lowtemperature cracks were performed in the years 2014 and 2020 on the same 68 road sections being in service in typical traffic conditions. The collected data were statistically analysed using the ordered logistic regression model....
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Current trends in consumption of multimedia content using online streaming platforms: A user-centric survey
PublikacjaIn its early days, consumption of multimedia content was only possible at a stationary terminal device. The music player was located at home, and had to have a physical drive. Over the last decade, there has been an enormous increase in the number of online streaming platforms. These services enable users to consume rich multimedia content on various devices. Thanks to the widespread and availability of portable devices, any person...
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Practical Use of Generic IT Organization Evolution Model
PublikacjaIn the paper we analyze, basing on the practical experiences, how the Generic IT Organization Model could be used to describe evolution of real-world IT support organization in relation to IT Service Management area.
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Algorytmy ewolucyjne w projektowaniu sieci MPLS
PublikacjaNiniejszy artykuł opisuje zrealizowane narzędzie, które umożliwia projektowanie sieci MPLS za pomocą Algorytmów Ewolucyjnych. Narzędzie to generuje ścieżki i optymalizuje alokację na nich przepływności żądań zapotrzebowań z uwzględnieniem klas obsługi strumieni ruchu z gwarancją zróżnicowanego QoS. Może także wybierać ścieżki do alokacji spośród danych wejściowych tak, aby wykorzystanie sieci było optymalne. Narzędzie to zostało...
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Metody Admission Control oparte na pomiarach.
PublikacjaSterowanie przyjęciem zgłoszenia jest kluczowym elementem sterowania domeną DiffServ warunkującym świadczenie przez operatora usług z IP QoS. Zasadniczym celem pracy jest dokonanie analizy związanej z metodami AC opartymi na pomiarach określanych skrótem MBAC. Scharakteryzowane zostało sześć metod realizacji MBAC o różnej złożoności obliczeniowej i pomiarowej. Przedstawiona została także realizacja procesu pomiaro-wego wielkości...
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Interoperability Description of Web Services Based Application Servers
PublikacjaWeb services standards were designed to enable interoperability of heterogeneous application servers in the Service Oriented Architecture. Although the standards proved to be highly successful, there are still difficulties in effective services integration. The paper presents a methodology that enables description of application servers interoperability in order to improve the service integration process. The methodology proposes...
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The Innovative Faculty for Innovative Technologies
PublikacjaA leaflet describing Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology. Multimedia Systems Department described laboratories and prototypes of: Auditory-visual attention stimulator, Automatic video event detection, Object re-identification application for multi-camera surveillance systems, Object Tracking and Automatic Master-Slave PTZ Camera Positioning System, Passive Acoustic Radar,...
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Tribological model of porous bearings with particular attention given to the lubricant lubricity
PublikacjaThe friction and wear problems, accompanying all the tribological systems, lead to reduced service life. In order to prevent such situation, it is necessary to maintain fluid friction, which improves durability of all friction nodes in a tribological system. In the paper, the tribological system consists of porous bearings and the model deals with their weakest spots - the oil outflow points in the porous wall. A kinetic model...
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Effects of the Covid-19 travel restrictions on metropolises mobility: empirical evidence from the Tricity metropolis (Poland)
PublikacjaThis paper aims to assess changes in mobility and modal shift caused by COVID-19 travel restrictions among the residents of Gdańsk Bay Metropolis (Poland). Measurement’s moments were assumed in periods differing in the level of restric- tions. The computer-assisted telephone interview (CATI) was carried out in November and December 2020. The results did not confirm the expected modal shift. However, significant changes in the number...
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Model of Rules for IT Organization Evolution
PublikacjaThe aim of this paper is to introduce the Model of Rules for IT Organization Evolution which shall be in compliance with the Generic IT Organization Evolution Model. Due to its general nature, a set of practical adjustments is proposed in order to adapt the Generic Model to the IT Service Management domain. Further, two sets of rules describing the evolution of the IT Service Management area are defined based on two types of rules...
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Model zaangażowania w relacji usługodawca-klient
PublikacjaW niniejszej monografii przedstawiono rozwiązania pozwalające lepiej zrozumieć złożoność relacji występujących pomiędzy usługodawcami a klientami oraz metody, które pozwalają tę wiedzę wykorzystać w doskonaleniu procesów organizacji usługowych. Monografia podejmuje problem kształtowania zaangażowania na styku usługodawca–klient jako wstępnego i koniecznego warunku rozwijania relacji w usługach. Opierając się na klasycznej drabinie...
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Further Developments of the Online Sound Restoration System for Digital Library Applications
PublikacjaNew signal processing algorithms were introduced to the online service for audio restoration available at the web address: www.youarchive.net. Missing or distorted audio samples are estimated using a specific implementation of the Jannsen interpolation method. The algorithm is based on the autoregressive model (AR) combined with the iterative complementation of signal samples. Since the interpolation algorithm is computationally...
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Category-Based Workload Modeling for Hardware Load Prediction in Heterogeneous IaaS Cloud
PublikacjaThe paper presents a method of hardware load prediction using workload models based on application categories and high-level characteristics. Application of the method to the problem of optimization of virtual machine scheduling in a heterogeneous Infrastructure as a Service (IaaS) computing cloud is described.
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Experimental Testbed of ASON/GMPLS architecture
PublikacjaThe paper presents the ASON/GMPLS architecture realized in the Department of Teleinformation Networks at Gdansk University of Technology based on the FSP 3000R7 ADVA Optical Networking platform. The FSP 3000R7 is a high-performance WDM networking system with GMPLS control plane for bidirectional transmission of optical signals. The system uses a modular structure which enables a flexible upgrade of capacity and functionality. The...
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Technologies for deodorization of malodorous gases
PublikacjaThere is an increasing number of citizens’complaints about odor nuisance due to production or service activity. High socialawareness imposes pressure on entrepreneurs and service providers forcing them to undertake effective steps aimed at minimi-zation of the effects of their activity, also with respect to emission of malodorous substances. The article presents informationabout various technologies used for gas deodorization....
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BeesyCluster as Front-End for High Performance Computing Services
PublikacjaThe paper presents the BeesyCluster system as a middleware allowing invocation of services on high performance computing resources within the NIWA Centre of Competence project. Access is possible through both WWW and SOAP Web Service interfaces. The former allows non-experienced users to invoke both simple and complex services exposed through easyto-use servlets. The latter is meant for integration of external applications with...
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A multi-agent method for periodicity detection in distributed events
PublikacjaMulti-agent systems working in constantly changing environments may be challenged by instantaneous unavailability of their autonomous agents caused e.g. by limited computing resources. A new method of self-organization of distributed service components is proposed, suitable for multi-agent systems. This method relies on particular agents carrying out separate analyzes of their individual processing loads or other specific events....