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1
Molerón, Bermudez Daniel, and Capilla Sergio Sánchez-Camacho. "Distributed DHCP for WMNs using IPv6." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-996.
Full textAbstract:
In a Wireless Mesh Network (WMN) exists mobile nodes which have an
unpredictable behaviour, i.e. they can join, leave and free move around the
network. For this reason, a static network configuration is not proper for them. A
distributed Dynamic Host Configuration Protocol (DHCP) is needed due to the
unavailability of a centralized server in a network placed over a vast extension.
This report shows a Distributed DHCP for WMNs using IPv6 (Internet Protocol
version 6). It is fault tolerant, robust and durable. The algorithm was created using
counters Bloom filters as data structure. After, a complete simulation of the system
was done. The simulations showed that using 24 servers with 16Mbits of memory
each one is possible to manage around 9000000 clients without adding an excessive
network load. Therefore, the DDHCPv6 could be in a near future the host
configuration protocol in WMN.
2
Joshi, Saugat. "Fast and Efficient Mutual Authentication in Wireless Mesh Networks (WMNs)." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1303843971.
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3
Ahmad, Waqas, and Muhammad Kashif Aslam. "An investigation of Routing Protocols in Wireless Mesh Networks (WMNs) under certain Parameters." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1127.
Full textAbstract:
Wireless Mesh Networks (WMNs) are bringing revolutionary change in the field of wireless networking. It is a trustworthy technology in applications like broadband home networking, network management and latest transportation systems. WMNs consist of mesh routers, mesh clients and gateways. It is a special kind of wireless Ad-hoc networks. One of the issues in WMNs is resource management which includes routing and for routing there are particular routing protocols that gives better performance when checked with certain parameters. Parameters in WMNs include delay, throughput, network load etc. There are two types of routing protocols i.e. reactive protocols and proactive protocols. Three routing protocols AODV, DSR and OLSR have been tested in WMNs under certain parameters which are delay, throughput and network load. The testing of these protocols will be performed in the Optimized Network Evaluation Tool (OPNET) Modeler 14.5. The obtained results from OPNET will be displayed in this thesis in the form of graphs. This thesis will help in validating which routing protocol will give the best performance under the assumed conditions. Moreover this thesis report will help in doing more research in future in this area and help in generating new ideas in this research area that will enhance and bring new features in WMNs.Wireless Mesh Networks (WMNs) bringar revolutionerande förändring inom området för trådlösa nätverk. Det är en pålitlig teknik i tillämpningar såsom bredband hemma nätverk, nätverkshantering och senaste transportsystem. WMNs består av mesh routrar, kunder mesh och gateways. Det är en speciell typ av trådlöst ad-hoc-nätverk. En av frågorna i WMNs är resurshushållning som inkluderar routing och routing det finns särskilda routingprotokoll som ger bättre prestanda vid kontroll med vissa parametrar. Parametrar i WMNs omfatta dröjsmål, genomströmning, belastningen på nätet etc. Det finns två typer av routingprotokoll dvs reaktiva protokoll och proaktiva protokoll. Tre routingprotokoll AODV, DSR och OLSR har testats i WMNs under vissa parametrar som är försenade, genomströmning och belastningen på nätet. Testning av dessa protokoll kommer att utföras i den optimerade Network Evaluation Tool (OPNET) Modeler 14.5. De erhållna resultaten från OPNET kommer att visas i denna avhandling i form av grafer. Denna uppsats kommer att bidra till att godkänna vilka routingprotokoll kommer att ge bäst resultat enligt den antagna förhållanden. Dessutom kommer denna uppsats rapport kommer att bidra till att göra mer forskning i framtiden på detta område och bidra till att generera nya idéer inom detta forskningsområde som kommer att öka och att nya funktioner i WMNs.
+46762749245
4
GHUMMAN, SHAKEEL AHMAD. "Security in Wireless Mesh Network." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4175.
Full textAbstract:
The Master’s thesis report describes the wireless mesh networks functions,
characteristics, network management and finally different protocols with security issues and applications. Wireless Networks (WMNs) are replacing wireless Infrastructure networks in many areas because of their lower and higher flexibility. The wireless mesh networks (WMNs) provides network access for both mesh and conventional clients through mesh routers and mesh clients. Communication across the network is formed via the bridge functions. Mesh router also provides the minimal mobility and form the backbone of WMNs.
Wireless mesh network has resolved the limitation of ad hoc networks which is ultimately improves the performance of Ad hoc networks. Security is a very important issue which can be resolve through proper management of network. The improvment of 802.11i security has greatly improved the network perfomance and increase the encryption and integrity security capabilities. The key points which are being addressed in this report are security issues and threats and their counter measures. Attacks which can come on diffent layers are being discussed in this survey. Security of wireless mesh network is still under consideration. Wireless mesh network are attracting more attention due to its enhanced features.
Wireless mesh network topology technology is being discussed in this report. Then network management of WMNs is explained and in the concluding chapters security issues are discussed. Threats, attacks and challenges of WMNs are discussed in this survey.
5
Mudali, Pragasen. "Topology control for wireless mesh networks and its effect on network performance." Thesis, University of Zululand, 2017. http://hdl.handle.net/10530/1565.
Full textAbstract:
A thesis submitted to the Faculty of Science and Agriculture in fulfilment of the Degree of Doctor of Philosophy in the Department of Computer Science at the University of Zululand, 2017InfrastructureWireless Mesh Networks (I-WMNs) are increasingly used to provide network connectivity and Internet access to previously under-served areas in the developing world. It is common for some of these deployments to be battery-powered due to a lack of electrical infrastructure in the targeted areas. Thus, the energy-efficiency of these networks gains additional importance. Topology Control (TC) has been previously reported to improve the energy-efficiency and network performance of wireless ad-hoc networks, including I-WMNs. However,simulation-based studies have been relied upon to reach these conclusions and the study of TC prototypes applicable to I-WMNs has largely been limited to design issues. Thus, the study of the efficacy of TC prototypes as a mechanism for improving energy-fficiency and network performance remains an open issue. The thesis addresses this knowledge gap by studying the dynamic, run-time behaviours and the network topologies created by two standards-compatible TC prototypes. This study provides unique insight into how the prototypes consume computational resources, maintain network connectivity, produce cumulative transceiver power savings and affect the workings of the routing protocol being employed. This study also documents the topology instability caused by transceiver power oscillations produced by the PlainTC prototype. A context-based solution to reduce transceiver power oscillations and the subsequent topology instability is proposed. This solution applies the Principal Component Analysis statistical method to historical network data in order to derive the weights associated with each of the identified context variables. A threshold value is defined that only permits a node to adjust its transceiver power output if the observed change in a node’s context exceeds the threshold. The threshold mechanism is incorporated into the PlainTC+ prototype and is shown to reduce topology instability whilst improving network performance when compared to PlainTC.The results obtained in this study suggest that I-WMN topologies formed by TC are able to closely match the performance of networks that do not employ TC. However, this study shows that TC negatively affects the energy efficiency of the network despite achieving cumulative transceiver power savings.
6
Nandiraju, Deepti. "Efficient Traffic Diversion and Load-balancing in Multi-hop Wireless Mesh Networks." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1258477338.
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Ni, Xian Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Performance evaluation of ETX on grid based wireless mesh networks." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/41016.
Full textAbstract:
In the past few years Wireless Mesh Networks (WMNs) have developed as a promising technology to provide flexible and low-cost broadband network services. The Expected Transmission Count (ETX) routing metric has been put forward recently as an advanced routing metric to provide high QoS for static WMNs. Most previous research in this area suggests that ETX outperforms other routing metrics in throughput and efficiency. However, it has been determined that ETX is not immune to load sensitivity and route oscillations in a single radio environment. Route oscillations refer to the situation where packet transmission switches between two or more routes due to congestion. This has the effect of degrading performance of the network, as the routing protocol may select a non optimal path. In this thesis we avoided the route oscillation problem by forcing data transmission on fixed routes. This can be implemented in the AODV (Ad hoc On-demand Distance Vector) protocol by disabling both error messages and periodic updating messages (the HELLO scheme). However, a critical factor for our approach is that ETX must determine a high quality initial route in AODV. This thesis investigates whether the ETX metric improves initial route selection in AODV compared to the HOPS metric in two representative client-server applications: the Traffic Control Network (TCN) and the Video Stream (VS) network. We evaluate the ETX and HOPS metrics in a range of scenarios which possess different link qualities and different traffic loads. We find the ETX metric greatly improves initial route selection in AODV compared to the HOPS in the network in which only single flow exists. For networks in which there are multiple simultaneous flows, ETX behaves similar to HOPS in initial route selection. Based on these results, we find the solution of route stabilization to route oscillations in the context of ETX is only useful in the single flow case. To address this problem, we propose a modified solution of repeatedly broadcasting RREQ (Route Request) packets. Simulation results show that our modified solution allows ETX to be useful in the initial route selection in both single flow and multiple simultaneous flows cases.
8
Moad, Dalil. "Contribution à l'amélioration de la qualité de service dans les réseaux sans-fil multi-sauts." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015PA05S010.
Full textAbstract:
Les réseaux sans fil 802.11 sont en train d'être considérés comme étant la pierre angulaire des systèmes de communication autonomes. En permettant aux usagers de communiquer les uns avec les autres avec les stations de base fixées a des endroits bien précis par l'intermédiaire de protocoles de communication comme les protocole de routage ad hoc. Le standard IEEE 802.11 propose des spéciations pour les deux couches basses (MAC et Physique) du modelé OSI. La couche MAC (Medium Access Control) introduit deux mécanismes d'accès au médium sans fil qui sont différents l'un de l'autre. Le mécanisme DCF (accès au canal distribue ou Distributed Coordination Function), l'accès au canal s'exécute dans chaque station sans faire appel à une unité centrale. Le mécanisme PCF (Point Coordination Function), contrairement au mécanisme DCF l'accès au canal se fait à l'aide d'une unité centrale. Le mécanisme le plus utilise par la norme 802.11 est DCF vu qu'il ne nécessite pas d'infrastructure au déploiement. Pour améliorer la qualité de service dans les réseaux sans multi- sauts, cette thèse aborde cette problématique dans deux couches de la pile protocolaire, à savoir la couche routage et la couches MAC. Elle améliore le routage a QoS en utilisant le protocole de routage a état de lien optimisé (OLSR) et améliore aussi l'efficacité de l'accès au médium sans fil lors du fonctionnement de la couche MAC en mode le plus courant DCF. Pour l'amélioration de routage, nous proposons une approche basée sur le graphe de conflit pour l'estimation de la bande passante partagée entre les nœuds adjacents. Pour la couche MAC, nous proposons un nouveau schéma de Backoff nomme l'algorithme Backoff de Padovane (PBA), pour améliorer l'efficacité de l'accès au médium sans fil dans les réseaux sans fil mobiles Ad Hoc (MANETs)IEEE 802.11 based wireless networks are considered the cornerstone of autonomous communication systems. These networks allow users to communicate with each others via base stations deployed in specic locations through a set of dedicated communication protocols like Ad Hoc routing protocols. The IEEE 802.11 standard proposes specications for both physical and MAC layers of the OSI model. MAC layer denes dierent types of access to the wireless medium as explained below. The DCF (Distributed Coordination Function) mechanism, in which the access to the medium is executed localy in each station. The PCF (Point Coordination Function) method, unlike DCF mechanism the access the medium is managed by a central unit. The most widespread mechanism among them is the DCF mode as it does not require any infrastructure deployment. To improve the Quality of Service (QoS) oered to the dierent applications in multihop wireless networks, this thesis proposes original solutions to enhance the eciency of certain protocols in two dierent layers of OSI, i.e., routing and MAC layers. More specically, our proposed solutions enable higher eciency of OLSR protocol and ensure more ecient usage of the available bandwidth through the designed Padovan based medium access scheme operating in DCF mode. The routing approach used in OLSR is improved by applying the conict graphs to acquire more accurate estimation of the bandwidth shared with the adjacent nodes. At MAC layer, the number of collisions in dense networks is signicantly reduced by designing new backo scheme dubbed Padovan Backo Algorithm (BEB)
9
Moad, Dalil. "Contribution à l'amélioration de la qualité de service dans les réseaux sans-fil multi-sauts." Electronic Thesis or Diss., Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB082.
Full textAbstract:
Les réseaux sans fil 802.11 sont en train d'être considérés comme étant la pierre angulaire des systèmes de communication autonomes. En permettant aux usagers de communiquer les uns avec les autres avec les stations de base fixées a des endroits bien précis par l'intermédiaire de protocoles de communication comme les protocole de routage ad hoc. Le standard IEEE 802.11 propose des spéciations pour les deux couches basses (MAC et Physique) du modelé OSI. La couche MAC (Medium Access Control) introduit deux mécanismes d'accès au médium sans fil qui sont différents l'un de l'autre. Le mécanisme DCF (accès au canal distribue ou Distributed Coordination Function), l'accès au canal s'exécute dans chaque station sans faire appel à une unité centrale. Le mécanisme PCF (Point Coordination Function), contrairement au mécanisme DCF l'accès au canal se fait à l'aide d'une unité centrale. Le mécanisme le plus utilise par la norme 802.11 est DCF vu qu'il ne nécessite pas d'infrastructure au déploiement. Pour améliorer la qualité de service dans les réseaux sans multi- sauts, cette thèse aborde cette problématique dans deux couches de la pile protocolaire, à savoir la couche routage et la couches MAC. Elle améliore le routage a QoS en utilisant le protocole de routage a état de lien optimisé (OLSR) et améliore aussi l'efficacité de l'accès au médium sans fil lors du fonctionnement de la couche MAC en mode le plus courant DCF. Pour l'amélioration de routage, nous proposons une approche basée sur le graphe de conflit pour l'estimation de la bande passante partagée entre les nœuds adjacents. Pour la couche MAC, nous proposons un nouveau schéma de Backoff nomme l'algorithme Backoff de Padovane (PBA), pour améliorer l'efficacité de l'accès au médium sans fil dans les réseaux sans fil mobiles Ad Hoc (MANETs)IEEE 802.11 based wireless networks are considered the cornerstone of autonomous communication systems. These networks allow users to communicate with each others via base stations deployed in specic locations through a set of dedicated communication protocols like Ad Hoc routing protocols. The IEEE 802.11 standard proposes specications for both physical and MAC layers of the OSI model. MAC layer denes dierent types of access to the wireless medium as explained below. The DCF (Distributed Coordination Function) mechanism, in which the access to the medium is executed localy in each station. The PCF (Point Coordination Function) method, unlike DCF mechanism the access the medium is managed by a central unit. The most widespread mechanism among them is the DCF mode as it does not require any infrastructure deployment. To improve the Quality of Service (QoS) oered to the dierent applications in multihop wireless networks, this thesis proposes original solutions to enhance the eciency of certain protocols in two dierent layers of OSI, i.e., routing and MAC layers. More specically, our proposed solutions enable higher eciency of OLSR protocol and ensure more ecient usage of the available bandwidth through the designed Padovan based medium access scheme operating in DCF mode. The routing approach used in OLSR is improved by applying the conict graphs to acquire more accurate estimation of the bandwidth shared with the adjacent nodes. At MAC layer, the number of collisions in dense networks is signicantly reduced by designing new backo scheme dubbed Padovan Backo Algorithm (BEB)
10
Халаберда, В. В., В. Є. Марчук, V. V. Halaberda, and V. Ye Marchuk. "Модернізація складу шляхом впровадження WMS системи." Thesis, Національний авіаційний університет, 2022. https://er.nau.edu.ua/handle/NAU/54820.
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У статті розглядаються рішення, що дозволяють оптимізувати бізнес-процеси за допомогою інформаційних технологій. Проаналізовано необхідність автоматизації обліку діяльності підприємств із використанням WMS для забезпечення конкурентоспроможності на конкурентному ринку.The article considers solutions that allow you to optimize business processes using information technology. The necessity of automation of the account of activity of the enterprises with use of WMS for maintenance of competitiveness in the competitive market is analyzed.
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Kivci, Erdem Turker. "Development Of A Methodology For Geospatial Image Streaming." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612570/index.pdf.
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Serving geospatial data collected from remote sensing methods (satellite images, areal photos, etc.) have become crutial in many geographic information system (GIS) applications such as disaster management, municipality applications, climatology, environmental observations, military applications, etc. Even in today&rsquos highly developed information systems, geospatial image data requies huge amount of physical storage spaces and such characteristics of geospatial image data make its usage limited in above mentioned applications. For this reason, web-based GIS applications can benefit from geospatial image streaming through web-based architectures. Progressive transmission of geospatial image and map data on web-based architectures is implemented with the developed image streaming methodology. The software developed allows user interaction in such a way that the users will visualize the images according to their level of detail. In this way geospatial data is served to the users in an efficient way. The main methods used to transmit geospatial images are serving tiled image pyramids and serving wavelet based compressed bitstreams. Generally, in GIS applications, tiled image pyramids that contain copies of raster datasets at different resolutions are used rather than differences between resolutions. Thus, redundant data is transmitted from GIS server with different resolutions of a region while using tiled image pyramids. Wavelet based methods decreases redundancy. On the other hand methods that use wavelet compressed bitsreams requires to transform the whole dataset before the transmission. A hybrid streaming methodology is developed to decrease the redundancy of tiled image pyramids integrated with wavelets which does not require transforming and encoding whole dataset. Tile parts&rsquo
coefficients produced with the methodlogy are encoded with JPEG 2000, which is an efficient technology to compress images at wavelet domain.
12
Knappe, Madeleine, and André Wunderlich. "Erstellung eines WMS zur Blattschnittübersicht aus CSW Metadaten." Thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-60838.
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Die Arbeit sollte die technische Machbarkeit der Verwendung digitaler Metadaten in Geodateninfrastrukturen aufzeigen und wenn möglich prototypisch umsetzen. Dabei sollten die Metadaten über Topographische Karten, welche in dem Metainformationssystem GeoMIS.Sachsen und über einen entsprechenden Katalogdienst (CSW) verfügbar sind, in einem Geoportal visualisiert werden. Im Ergebnis wurde ein Workflow entwickelt und umgesetzt, welcher die Metadaten automatisch abruft, die Metadaten entsprechend transformiert und abschließend die Metadaten über einen Kartendienst (WMS) für beliebige Geoportale bereitstellt. Dadurch ist es möglich die Aktualität von bereits vorhanden Kartendiensten bzw. deren Daten abzufragen. Durch die zyklische Ausführung des Prozesses auf dem Server stehen dem Nutzer jederzeit aktuelle Blattschnittübersichten zur Verfügung. Darüber hinaus steht ebenfalls ein Kartendienst für Vektordaten bereit über den die Geometriedaten und zusätzliche Sachinformationen direkt abgerufen werden können. Außerdem wird ein direkter Verweis (Link) auf den entsprechenden Metadatensatz im GeoMIS.Sachsen angegeben. Weiterhin wurde eine Transformation entwickelt, welche die im XML vorliegenden Metadaten in eine SVG überführt. Diese interaktive Blattschnittübersicht kann direkt auf Webseiten eingebunden werden. Außerdem kann aus dem SVG Format wiederum automatisiert ein PDF Dokument erstellt werden. Die Arbeit konnte nachweisen, dass zukünftig eine doppelte und getrennte Datenführung von Metadaten und Blattschnittübersichten nicht notwendig ist. Die Verwendung der IT Standardtechnologie XSLT zur Transformation von XML Daten hat sich bewährt und ermöglicht auch die Unterstützung weiterer Formate wie z.B. XHTML, KML (google) oder XCPF. Der erarbeitete Ansatz ist auch für andere Geodaten wie z.B. Luftbilder, historische Karten oder Bebauungspläne anwendbar. Durch die Visualisierung der textbasierten Metadaten war außerdem eine Qualitätssicherung der Metadaten möglichThe work shows the technical feasibility of digital metadata within Spatial Data Infrastructures. The visualization of digital geo-metadata in geoportals was prototypical implemented. The use case was a map sheet index of topographical maps who is prepared automatically. Geo-metadata are described in the metadata information system GeoMIS.Sachsen and provided by a catalogue service (CSW). As a result a workflow was developed and implemented which calls the metadata automatically, transforms the metadata into GML and finally prepares the metadata through a web map service in geoportals. Thereby it is possible to analyze the actuality of the topographical maps through map sheet index. Because of the cyclical update of the data the map patterns are always up to date. There is also a map service for vector data (WFS) implemented which enables a user to directly retrieve additional factual information. Furthermore a direct URL to the metadataset in the GeoMIS.Sachsen is stated. Besides the GML transformation another one was developed, which converts the metadata in XML format into scalable vector graphics (SVG). This interactive map sheet index could be integrated directly on websites. It is also possible to create a PDF document automatically out of the SVG with appropriate software tools. By using the XSLT standard additional formats could also be served. For example a transformation of the XML source data into KML (Google), XHTML or XCPF is possible. This work demonstrates that there is no need for a separation of metadata and map sheet index any more. The usage of XSLT was profitable and supports a lot of formats. The workflow is also usable for other geo data like air photography, historical maps or development plans. In addition it is possible to use the workflow to visualize other metadata like resolution or prices of each map. Because of the visualization of the text based metadata a quality check of the data is possible
13
Velebová, Denisa. "Rozvoj modelu MBI v oblasti implementace a integrace WMS." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-201671.
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The aim of this thesis is the implementation and integration of solutions for Intelligent Warehouse Management into the ERP system, and its representation in the reference model of MBI. The work is composed of the individual chapters, of which the first chapters provides an extensive search to acquaint the reader with the basic characteristics of logistics, and logistics information technology support, which aims to improve KPI reporting and the level of SCM. The thesis also solves the characteristics and functionality of ERP and WMS systems and systems integration. The main part of the thesis describes the various stages of implementation and integration in the form of four tasks and their related factors representing general practices and procedures for the successful implementation of the system for Intelligent Warehouse Management.
14
Liu, Zongyi. "Self-Adaptive Bandwidth Control for Balanced QoS and Energy Aware Optimization in Wireless Sensor Network." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0034/document.
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Dans le domaine des réseaux de capteurs multimédias sans fil (WMSN), le flux fortement saturé augmente la probabilité de collision et de congestion dans la transmission de données, ce qui dégrade considérablement la performance de la qualité de service (QoS). La technique de déploiement multicanaux est souvent appliquée à la transmission en parallèle pour garantir la QoS. Cependant, comment faire le compromis entre l'exigence QoS et l'efficacité énergétique est un défi pour WMSN énergie-limité. L'analyse théorique de la couche MAC et de la structure de la couche PHY basée sur la norme IEEE 802.15.4, vise à étudier le modèle analytique cross-layer afin de mieux comprendre la relation entre les paramètres du réseau de capteurs et la performance, ouvrant ainsi la voie à de nouvelles améliorations. Recherche d'optimisation multi-canaux. Trouver un indicateur de performance efficace et concevoir une méthode de collecte ou d'estimation de performance efficace basée sur les métriques correspondantes, qui pourraient être utilisées comme entrée de paramètre du mécanisme d'affectation multicanaux. Le système de contrôle dynamique complet est conçu pour une tâche d'attribution multicanal basée sur des techniques d'intelligence de calcul léger et efficace. Nous présentons un mécanisme d'attribution multicouches à bande passante dynamique à fuzzy (MCDB_FLS). La bande passante proactive disponible dans la couche croisée est estimée comme paramètre pour le contrôle d'admission de déploiement multicanal. Une approche axée sur l'apprentissage par renforcement est proposée pour une prise de décision judicieuse dans la mission d'allocation multicanaux. En outre, le modèle de seuil de bande passante basé sur la logique floue fournit une optimisation dynamique sur le contrôle d'admission du système. Les simulations montrent que le MCDB_FLS fonctionne mieux que la référence sur les mesures de QoS et l'efficacité énergétique, réalise le compromis entre l'efficacité énergétique et l'amélioration de la QoS. Enfin, nous introduisons l'intégration de l'approche incrémentielle d'apprentissage automatique dans le mécanisme d'affectation multicanaux avec la Deep Q Network (DQMC). En outre, l'initialisation du poids par action est implémentée sur la base d'un classificateur d'apprentissage supervisé multi-classes avec une approche par empilement. DQMC améliorer la capacité d'auto-adaptatif et de contrôle intelligent pour apprendre le modèle de l'environnement différent de multi-tâches WMSNsIn the Wireless Multimedia Sensor Networks (WMSNs) field, highly saturated flow increases the probability of collision and congestion in data transmission which dramatically degrade the performance of Quality of Service (QoS). Multi-channels deployment technique is often applied to parallel transmission for QoS guarantee. However, how to make trade-off between QoS requirement and energy efficiency is a challenges to energy-constrained WMSNs. Theoretical analysis of MAC layer and PHY layer structure based on IEEE 802.15.4 standard, aim to study on the cross-layer analytical model in order to provide stronger understanding on the relationship between sensor network parameters and performance, pave the way for new enhancements in succedent multi-channel optimization research. Find effective performance indicator and design efficient performance collection or estimation approach based on the corresponding metrics, which could be used as the parameter input of multi-channel assignment mechanism. Comprehensive dynamically control system is designed for multi-channel assignment task based on light weight and high efficient computation intelligence techniques. We present a fuzzy-based dynamic bandwidth multi-channel assignment mechanism (MCDB_FLS). Cross-layer proactive available bandwidth is estimated as parameters for multi-channel deployment admission control. Reinforcement learning-based approach is proposed for more wisely decision-making in multi- channel allocation mission. Furthermore, fuzzy logic-based bandwidth threshold model provides dynamic optimization on system admission control. Simulations show the MCDB_FLS performs better than benchmark on the metrics of QoS and energy efficiency, achieves the trade-off between energy efficiency and QoS improvement. Finally, we introduce the integration of incremental machine learning approach into multi-channel assignment mechanism with Deep Q Network reinforcement learning method (DQMC). Besides, fully action weight initialization is implemented based on multi-class supervised learning classifier with stacking ensemble approach. DQMC improve the ability of self-adaptive and smart control to learn pattern from different environment of multi-tasks WMSNs
15
PEREIRA, MARCONI DE ARRUDA. "AN IMPLEMENTATION OF THE WMS SERVICE OVER THE TERRALIB LIBRARY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5657@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORGRUPO DE TECNOLOGIA DE COMPUTAÇÃO GRÁFICA - PUC-RIO
Este trabalho descreve uma implementação dos serviços definidos no padrão Web Map Server (WMS), publicado pelo Open GIS Consortium, tendo como base a biblioteca Terralib. Em particular, o resultado deste trabalho permite que qualquer cliente que implemente o padrão WMS visualize dados armazenados e manipulados pela TerraLib. Este pode ser considerado o primeiro passo para tornar a TerraLib compatível com o padrão OpenGIS, proporcionando assim interoperabilidade ampla, através de um protocolo relativamente simples e muito bem definido, com vários sistemas de GIS existentes atualmente.
This work describes an implementation of the services defined by the Web Map Server (WMS) standard, published by the Open GIS Consortium, over the TerraLib library. In particular, the results of this work allow any client that implements the WMS standard to visualize data stored in a TerraLib database. This work can be consider as a first step towards making the TerraLib library compliant with the OpenGIS standard, thereby facilitating interoperability, using a relatively simple and well-defined protocol, with a variety of existing GIS software.
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Less, Adam David. "Cultural Biases in the Weschler Memory Scale iii (WMS-iii)." UNF Digital Commons, 2012. http://digitalcommons.unf.edu/etd/591.
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The Wechsler Memory Scale –iii is the newest version of a six-decade old neuropsychological inventory. Since its conception, the Wechsler Memory Scale has been highly utilized by practitioners to accurately assess various memory functions in adult subjects. Revisions made within this inventory include the Faces I subtest, a facial recognition scale, which was added in order to strengthen the instrument’s accuracy at measuring episodic memory. Facial recognition, both cross-race and within-race, has been researched extensively and consistent biases have been found between race of test taker and cross-racial identification. Theories of exposure/contextual interaction (environment) and biological foundations have been the subject of study in the past in order to determine from where these racial identification deficits stem. The current study focuses on revealing bias in the Faces I subtest, regarding to an unequal distribution of racially representative faces in the testing materials. Eighty-eight college students were recruited to view forty-eight pictured faces from the Faces I subtest and determine the racial category to which the pictured face belonged. The subjects’ categorical responses were the basis for calculating a percent agreement score for racial category of each face. It was determined, using the results of subjects’ responses, that the Faces I subtest contained an unequal distribution of racially representative faces in both the Target and Interference testing material. This confirmed the presence of an inherent bias within the subscale. The implications of memory accuracy for the WMS-iii are discussed as it relates to different fields of study, but none more directly than the criminal justice system. Eyewitness testimony is a pivotal evidentiary tool in the criminal justice system, and ramifications of cross-racial identification deficits and biases in the tools to accurately assess memory are increasingly bringing this once heavily relied upon tool into question.
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Soriano, Felipe Furlan. "Gestão de armazenagem: uma análise do sistema de gestão WMS." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/96/96132/tde-26092013-141420/.
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Esta dissertação teve por objetivo analisar a influência do sistema de gestão de armazenagem (WMS) nas organizações usuárias estudadas, a partir da pesquisa bibliográfica realizada acerca do tema estabelecido e da análise de conteúdo das informações provenientes das entrevistas semiestruturadas efetuadas num estudo multicasos envolvendo duas empresas desenvolvedoras do software WMS e três organizações usuárias desta ferramenta. Dessa forma, foi possível identificar e analisar os pontos fortes e fracos do sistema, bem como as funcionalidades atualmente oferecidas ao mercado. Após a análise de tais informações, pode-se concluir que os fatores-chave para que ocorra uma implantação bem-sucedida do sistema são: o apoio da alta gerência, a realização prévia de um treinamento do pessoal envolvido na operação, o bom mapeamento e formalização dos processos organizacionais da empresa usuária, assim como a execução de um cadastro assertivo de produtos e endereços. Dentre os benefícios provenientes da adoção do sistema, além daqueles mencionados pela literatura, identificou-se a ocorrência de uma maior satisfação e motivação da equipe operacional, em virtude da mudança para uma rotina de trabalho mais organizada. Por fim, como tendências para o aprimoramento do WMS foi relatado: a integração do sistema com a tecnologia RFID, o desenvolvimento de novos relatórios gerenciais e a vinculação da mobilidade à ferramenta, disponibilizando o seu uso via tablets e smartphones.This dissertation aimed analyze the warehouse management system (WMS) influence on the studied companies, from the literature research about the established theme and the content analysis of the informations derived from semi-structered interviews performed in a multi case study surrounding two enterprises that develop the WMS software, and three organizations that are users of it. Thereby, was possible identify and analyze the strengths and weaknesses of the system, as well the features currently offered to the market. After the analysis of this informations, it can be conclude that the key factors for the success of the implementation are the top management support, employees previous training, good mapping and formalization of user company\'s process, as the execution of a registration assertive products and addresses. Among the benefits arising the system adoption, besides those mentioned on the literature, was identified the occur of a greater satisfaction and motivation of the operational team, due to the work rotine change to a more organized way. Finally, as the trends of WMS improvement, was related: the integration of the system with the RFID technology, development of betters management reports and the link between the tool the mobility, making its use for tablets and smartphones.
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Burke, Thomas P. H. "Design of a modular mobile robot." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339301.
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Thanjavur, Karunananth G. "Generic dynamic modelling and model-based trajectory tracking control of wheeled mobile robots (WMRs)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40219.pdf.
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Kovalenko, Darya, and Дар'я Юріївна Коваленко. "It product comparison for warehouse management." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50512.
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1. Womack, J., & Jones, D. (1996).- Lean Thinking: Banish Waste and Create Wealth in Your Corporation" ( edition of 2018 years).
2. Heizer, J., & Render, B. (1999). Operations management. Upper Saddle River, N.J: Prentice Hall. Chicago (Author-Date, 11th ed.).
3. Inmon, Bill (1992). Building the Data WarehouseWarehouse management software, or WMS, is an automated system, designated to manage the mundane operations of warehouse. Warehouse management software, also may be able to refer as warehouse management system, has built-in programs being enabled business to manage various tasks from centralized location. Warehouse Management Software has the goal of optimization warehouse center management. Furthermore, facilitation the processes of planning, controlling and utilization of available resources to move and store finished products and materials.
Програмне забезпечення для управління складом (WMS) - це автоматизована система, призначена для управління буденними операціями складу. Програмне забезпечення для управління складами, яке також може називатися системою управління складом, має вбудовані програми, що дозволяють бізнесу керувати різними завданнями з централізованого розташування. Програма управління складами має на меті оптимізацію управління складським центром. Крім того, полегшення процесів планування, контролю та використання наявних ресурсів для переміщення та зберігання готової продукції та матеріалів.
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Benzid, Djedjiga. "Le réseau privé virtuel (VPN) sur les réseaux maillés sans fil WMN." Mémoire, École de technologie supérieure, 2014. http://espace.etsmtl.ca/1303/1/BENZID_Djedjiga.pdf.
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Les Réseaux Privés Virtuels (VPN) peuvent offrir une grande sécurité aux réseaux maillés sans fil (WMN). Toutefois, le déploiement conjoint des deux technologies devient problématique pour la gestion de la mobilité IP dont souffrent déjà les deux réseaux. En effet, diverses solutions ont été proposées pour assurer un handoff VPN rapide et transparent sur les réseaux sans fil. Cependant, ces solutions ne peuvent pas fonctionner convenablement sur les WMNs qui ont des caractéristiques de multi saut et une topologie dynamique. À cet effet, une nouvelle approche est proposée, l’algorithme Seamless Handoff VPN pour les réseaux maillés sans fil (SHVM). Celui-ci repose sur trois conceptions, à savoir la conception de chemin optimal, la conception de CE (Customer Edge) basés sur VRF et la conception de l’application de l’adresse statique de VPN. L’objectif de la solution proposée est de réduire le délai de handoff et de minimiser le taux de perte de paquets. Le modèle proposé est supposé être sécurisé avec la technologie MPLS-VPN. Dans le but de valider notre approche, le modèle a été simulé sur OPNET 16. Les résultats obtenus montrent que le délai et le taux de pertes de paquets sont effectivement inférieurs aux normes requises pour assurer un seamless handoff pour une application en temps réel.
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BARROS, MONICA COUTINHO DE. "WAREHOUSE MANAGEMENT SYSTEM (WMS): THEORETICAL CONCEPTS AND IMPLEMENTATION AT A DISTRIBUTION CENTER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7340@1.
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Nos dias de hoje, com o ambiente empresarial cada vez mais
competitivo, a
tecnologia de informação, quando bem utilizada, torna-se
um importante
diferencial entre as empresas na busca pela excelência no
atendimento ao cliente.
Desta forma, cada vez mais as empresas procuram
alternativas para facilitar o
gerenciamento de suas atividades, visando aumentar o
controle, reduzir os custos
e obter informações precisas que possam de fato agilizar a
tomada de decisões e consequentemente melhorar o nível do serviço prestado. O
Sistema de Gestão de Armazéns (Warehouse Management System - WMS) vem sendo
implementado
principalmente pelos grandes operadores logísticos. A
pesquisa realizada pela
Booz Allen & Hamilton em parceria com o Centro de Estudos
em Logística em
2001 (CEL-Coppead) constatou que até 50% dos operadores
logísticos
pesquisados já utilizavam esta tecnologia (Costa et al.,
2001). Dado o crescimento
do uso do WMS, e a possibilidade por parte da autora de
participar da
implementação desta tecnologia em uma empresa durante o
desenvolvimento de
sua pesquisa de mestrado, os objetivos desta dissertação
são: mapear a operação do Centro de Distribuição (CD) da Empresa Alfa antes da
implementação do WMS; e analisar o processo de implementação de um WMS em
um CD em operação. Como a autora fizera parte da equipe de
implementação do WMS na
Empresa Alfa, a metodologia utilizada para a elaboração
desse trabalho incluiu:
pesquisa bibliográfica, visitas in loco e entrevistas não
estruturadas junto aos
envolvidos na operação. O resultado desta dissertação é
uma análise da operação antes e durante a implementação do WMS, aliado aos
principais resultados extraídos pelas simulações, dado que até o presente
momento o WMS ainda não se tornou uma realidade junto a Empresa Alfa devido a
mudanças estratégicas no cronograma de implementação.Nowadays, in a competitive business environment, when the information of technology is well used it becomes of a great value among companies that search for excellence in customer relationship attendance. Therefore, more and more often, the companies are searching for alternatives to ease the management of activities, increasing control, reducing costs and getting important information that can result in quicker decisions and consequently improve the level of the service. Recently, the WMS is being implemented in general by the biggest logistics operators. A Booz Allen & Hamilton´s research in partnership with the Center of Studies in Logistic in 2001 (CEL-Coppead) evidenced that up to 50% of the logistic operators have already been using this technology (Costa et al., 2001). Due to the growth of WMS use and the possibility for the author to participate in an implementation of this technology in a company during her Master Research, the objectives of this work are: to map the operation of the Alpha Company´s Distribution Center (DC) before WMS implementation; and analyze the WMS implementation process in a DC that is in operation. Since the author was part of the team in the implementation of WMS in the Alpha Company, the methodology used for the elaboration of this work included: bibliographical research, visits in loco to the Alpha Company´s DC and non structuralized interviews with the involved parts in the operation. As a result of this work, we have an analysis of the operation before and during the implementation of the WMS in line with the main results of the simulations, given that until the present moment, due to strategic changes in implementation chronogram the WMS still has not become a reality in the Alpha Company.
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Lindström, Filiz. "Förutsättningar för effektiv tredjepartslogistik : en studie om effektiviseringar med hjälp av WMS." Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19492.
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IT och logistik är två områden i ständig utveckling. IT har skapat helt nya förutsättningarför planering och effektivisering inom logistiken. I dagens samhälle är en välutveckladkommunikation avgörande för effektiv logistik. IT har även möjliggjort nyaorganisationsstrukturer i form av supply chain management och outsourcing medtredjepartslogistiker. För en tredjepartslogistiker kan det vara avgörande att kunna arbetaeffektivt med både material- och informationsflöden. Med hjälp av moderna WMS kantredjepartslogistiker effektivisera arbetet i betydande utsträckning. Denna uppsats belyserde förutsättningar som skapar effektiv tredjepartslogistik med fokus på deeffektiviseringar som kan uppnås med hjälp av WMS. Studien baseras på grundliggenomgång av teorier samt fallstudier som genomfördes med intervjuer och fokus grupphos två stora tredjepartslogistiker. I studien argumenterar jag för de förutsättningar somidentifierats för att effektiv tredjepartslogistik skall uppnås. Studien visar att effektiveffektivitetsmätning, god systemanvändning och verksamhetsinriktad systemutvecklingär viktiga förutsättningar för effektiv tredjepartslogistik.
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Concha, Díaz-Muñoz Myrna, González Priscila Délano, Jara Carolina Pérez, and Allende Fabiola Silva. "Estandarización de la Escala de Memoria de Wechsler, tercera edición (WMS-III)." Tesis, Universidad de Chile, 2002. http://repositorio.uchile.cl/handle/2250/134884.
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Biba, Panagiota. "New waviness measurement system using RGB LED lights." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28314.
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Due to the rapid technological developments in the car industry and the high quality demands of customers, manufacturers and researchers focus on the reduction of surface roughness making use of various surface topography measurement systems. This master thesis focuses on development of a waviness measurement system (WMS) at Volvo Cars where light from different heights and angles illuminates the surface of an extended object in order to acquire images with different intensities due to shadowing effect and reflection. With this, surface irregularities and imperfections can be detected both in polished and unpolished surfaces for improving the car panels in the manufacturing process. The initial WMS idea was to illuminate the surface at different heights from the four corners of a dark room using 20 flash lights and a camera positioned exactly on the top of the surface in the middle of the room. The first light goes on and the image is acquired. This procedure continues for all flash lights in 19s.The acquired images were evaluated by Matlab application. With the new WMS system flash lights are replaced by 32 RGB COB LED lights using the DMX512 protocol to communicate with them. The system runs in 9s which is half the time of the old WMS system. New LabView and Matlab codes were adjusted to the new parameters and devices. In the end, measurements were taken with different surfaces, exposure times and color lights. Details of the new devices and software are analyzed in this thesis.
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Santos, Nuno Miguel Vicente. "Logística na indústria do ovo." Master's thesis, FEUC, 2011. http://hdl.handle.net/10316/18113.
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Relatório de estágio do mestrado em Gestão, apresentado à Faculdade de Economia da Universidade de Coimbra, sob a orientação de Rui Pedro Santos Lourenço e Cristovão Domingues.Nos últimos anos a logística tem-se revelado fundamental para qualquer empresa, na medida em que a falta de um componente, numa linha de produção pode significar a paragem da empresa e por consequência o encerramento temporário, da mesma. Um exemplo disso foi o caso ocorrido durante o período de greve dos camionistas que obrigou certas empresas a pararem a produção, por falta de componentes e matéria-prima. A logística pode ser fragmentada em diversas áreas, tais como a expedição; a recepção; a gestão de armazém, entre outros. A esta logística, normalmente, chama-se logística directa, pois o fluxo vai sempre ao encontro do cliente com o intuito de entregar a mercadoria nas melhores condições, de modo a superar as suas expectativas. Recentemente, as empresas têm enfrentado um novo problema que se prende com as recolhas ou devoluções dos clientes, é chamada logística inversa que não é mais do que a circulação dos bens, no sentido inverso à logística directa. É nesta logística que as empresas manifestam as maiores dificuldades, sendo por vezes o seu custo elevadíssimo. Outra dificuldade consiste em registar a entrada da mercadoria, bem como, saber da sua localização no armazém. Para a realização do presente trabalho procurei fundamentar conceitos relacionados com cadeia de abastecimento, logística, picking, transportes, Warehouse Management Systems (WMS) e tecnologias de Radio-Frequency IDentification (RFID), como componentes de uma estratégia logística, no sentido de optimizar resultados e criar vantagem competitiva. O estágio compreendeu a instalação de um WMS apoiado por um sistema de picking, em que os registos dos produtos passaram a ser feitos de uma forma informatizada, tanto à entrada como à saída. Com o aumento do volume de mercadorias a circular e com o alargamento da gama de produtos que a empresa começou a produzir e a vender, houve necessidade de colocar um sistema que facilitasse a recepção das matérias-primas e a expedição dos produtos. Outra razão que levou a empresa a adoptar um sistema de gestão de armazém foi a necessidade de aumentar a fiabilidade da informação e a eliminação de erros na introdução de dados relativos aos produtos. Acresce-se ainda que a competitividade do mercado faz com que as empresas necessitem de sistemas informáticos, que possibilitem a comunicação entre os parceiros da cadeia de abastecimento. Deste modo, a empresa teve necessidade de instalar um WMS apoiado por um sistema de picking. O presente trabalho pretende mostrar quais poderão ser as mais-valias na implementação de um sistema de gestão de armazém, ao nível da poupança de custos e diminuição das perdas, resultantes da falta de gestão de stocks.
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DOLAVALE, ALCIONE SANTOS. "RISKS IN THE IMPLEMENTATION OF WAREHOUSE MANAGEMENT SYSTEM (WMS) IN DISTRIBUTION CENTER: CASE STUDY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=32912@1.
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Atualmente, a Tecnologia da Informação (TI) tem assumido papel essencial para o alcance da administração eficiente, tanto no nível estratégico como no operacional, oferecendo benefícios para os negócios que incluem redução de custo, aumento da produtividade, qualidade, flexibilidade e inovação. E um dos recursos empregados é a implantação de um Sistema de Gestão de Armazéns, denominado Warehouse Management System (WMS), software que recebe as informações pertinentes ao armazém, gerando respostas para uma melhor movimentação, armazenagem, separação e expedição dos produtos, conforme as necessidades da organização. No entanto, a implantação de um sistema WMS pode ser considerada bem mais do que um projeto de tecnologia, que envolve mudanças estruturais e comportamentais, tornando-se um processo de risco relativamente alto e complexo. Este trabalho tem como objetivo identificar e planejar respostas aos riscos na implantação de um WMS no novo armazém de
uma grande empresa brasileira do setor de cosméticos. Os resultados obtidos comprovaram inúmeras atividades que devem ser gerenciadas em favor do não comprometimento dos objetivos propostos da empresa, embora sabendo que o risco é algo incerto quanto à sua ocorrência. Ainda assim, para os futuros usuários do WMS, compreender a inclusão do gerenciamento de riscos nos seus projetos de implantação irá trazer maior probabilidade de sucesso, pois quanto mais forem conhecidos os riscos e as ações de mitigação, mais confiança e segurança as empresas terão em projetos desta natureza.Currently, Information Technology (IT) has assumed crucial role for achieving the efficient administration at both the strategic and the operational, providing business benefits that include reducing costs, increasing productivity, quality, flexibility and innovation. And one of the resources used is the implementation of a Warehouse Management System, called Warehouse Management System (WMS) software that receives the relevant information to the warehouse, generating responses for improved handling, storage, picking and shipping of products as the organization s needs. However, the implementation of a WMS system can be considered much more than a technology project that involves structural and behavioral changes, becoming a process of relatively high risk and complex. This study aims to identify and plan responses to the risks of implementing a new WMS in the warehouse of a large company in the cosmetics industry. The results confirmed many activities that must be managed in favor of non-commitment of the proposed objectives of the company, while knowing that the risk is somewhat uncertain as to its occurrence. Still, for future users of the WMS, to understand the inclusion of risk management in their deployment projects will bring greater likelihood of success, because as more becomes known risks and mitigating actions, more confidence and security firms will take into projects of this nature.
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Glimmersten, Johan. "Prestandatester av WMS och WFS : En jämförelse av tre geospatiala servermjukvaror med öppen källkod." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-41711.
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The enthusiasm for free and open source software has increased since the year 2000 as more open source code has become available online. Such software is interesting for both public and private sector as license expenses can be significantly reduced. Along with this development, storing data in service oriented architectures has become a more common procedure. Foran Sweden is a company that provides geographical remote sensing products. Their existing system for supplying customers with map services is based on proprietary software which leads to high license expenses. Consequently, Foran Sweden aim to migrate to a system based on free and open source software. In order to provide Foran Sweden and other comparable, with sufficient material for decision making, this work will compare a number of open source geospatial server software products with emphasis on performance. It is also important that the web services are easy to manage and administrate. Apache JMeter has been used to perform the performance tests on three widely used software products that can handle the standards of Web Map Service (WMS) and Web Feature Service (WFS). A number of common data formats with varying storage size were used to test the software products. QGIS server performed best in 10 out of 12 scenarios for WMS. In contrast QGIS was the slowest while testing WFS, and together with MapServer, they generated a high number of server errors while simulating 30 and 60 users. GeoServer was the quickest and most stable software for WFS and showed good performance in all scenarios with every dataset. The administrative interfaces of GeoServer and QGIS are both easy to learn and manage while MapServer uses a text-based interface for the management of web services, which requires more effort from the administrator.Entusiasmen kring gratismjukvaror med öppen källkod tycks ha ökat under 2000-talet då allt mer öppen källkod blivit tillgänglig på nätet. Sådana programvaror är intressanta för aktörer inom både privat och offentlig sektor då kostnader för mjukvarulicenser kan minskas. Simultant med denna utveckling har datalagring i tjänsteorienterade arkitekturer blivit vanligare. Foran Sverige är ett företag som bland annat erbjuder geografiska fjärranalysprodukter. Deras system för distribuering av karttjänster bygger idag på mjukvara med proprietär källkod som innebär höga licenskostnader, därför vill de se på möjligheterna att migrera till ett system med kostnadsfria mjukvaror. För att bidra med beslutsunderlag till Foran och andra verksamheter som ser till möjligheterna att migrera har ett antal mjukvaror för distribution av karttjänster valts ut och genomgått prestandatester. Det är också viktigt att det administrativa gränssnittet i mjukvarorna är relativt enkelt att använda. Programvaran JMeter har använts för att belastningstesta tre olika geospatiala servermjukvaror med öppen källkod vid leverans av standarderna Web Map Service (WMS) och Web Feature Service (WFS). Ett antal vanliga dataformat med varierande lagringsvolym valdes ut som testdata. QGIS server hade nästan genomgående den högsta överföringshastigheten vid test av WMS. I kontrast presterade QGIS sämst vid test av WFS med lägst överföringshastighet och tillsammans med MapServer levererades stundtals ett högt antal felaktiga responser vid 30 respektive 60 simulerade användare. GeoServer presterade mest kontinuerligt vid de olika datakällorna och hade genomgående den högsta överföringshastigheten vid test av WFS. De administrativa gränssnitten hos GeoServer och QGIS anses båda vara lätta att använda medan MapServer är betydligt svårare då karttjänstens alla parametrar definieras i ett textbaserat gränssnitt.
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Costa, Walter Antonio da Silva [UNESP]. "Proposta de etapas de implementação de WMS: um estudo de caso em um varejista moveleiro." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/93065.
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Uma das etapas críticas da distribuição física está no gerenciamento e administração dos produtos que são armazenados em Centros de Distribuição (CD), ou seja, nas operações de recebimento do pedido, recebimento de mercadorias, controle de qualidade, movimentação de materiais, armazenagem, separação e expedição. São críticas, também, as informações relacionadas aos produtos como quantidade, prazo e a rapidez no atendimento aos pedidos. O Warehouse Management System (WMS) é um sistema especialista que gerencia operações de CD, buscando atender as necessidades inerentes dessa atividade. Dessa forma, muitas empresas adotam estes sistemas objetivando o aprimoramento das operações logísticas e do gerenciamento do CD. Vem ocorrendo nas empresas uma série de implementações de WMS em diversos segmentos. O setor moveleiro possui muitas particularidades no tocante a logística de armazenagem das mercadorias, tais como: tamanhos, geometrias e pesos bem diferentes; alta rotatividade de modelos; alta segmentação de produtos no CD com mesmo código de venda. O objetivo principal desta pesquisa é apresentar uma proposta de etapas para implementação de WMS em CD. Foi conduzido um estudo em uma empresa varejista de grande porte do setor moveleiro que foi uma das pioneiras na implementação do WMS. A empresa adotou em seu CD um WMS para atuar em conjunto com o sistema gestor (Enterprise Resource Planning - ERP) da organização. Considerando a literatura um pouco escassa e dispersa nesta área específica do conhecimento em âmbito nacional, procurou-se prover aos praticantes um estudo que demonstre que, com uma correta implementação e uso do WMS, significativos ganhos podem ser obtidos. O resultado desta pesquisa é a proposição detalhada de uma série de etapas para a implantação de WMS, bem como uma descrição do sistema de informação e operação do CD antes e depois da implementação do WMS da empresa focal.
On of the critical phases of the physical distribution is the managemente and administration of products which are stored in warehouse, mainly in operations of order fulfillment. There are critical information related to products such as; quantity, time reliability and speed in the customer service. The Warehouse Management System (WMS) is a specialist system which manages the operations of warehouses, attempting to meet the inherent needs of these operations. This way, many companies adopt these systems aiming at the improvement of the logistics operations and the management of warehouses. There have been implementations of the WMS in several business segments. The furniture sector posses many particularities related to storage of goods, such as: geometries and different weights; high models turmaround; high segmentation of products in warehouse with the same sale code. The main objective of this research is present an implementation planning methodology of WMS in warehouses. It was driven a study of a large-scale retail company from the Braziliam furniture sector. The company adopted in their warehouse, a WMS to work together with the ERP of the organization. Considering the operational improvement potential, this study aims at providing the practitioners with a study which shows that, with a good implementation and correct use of the WMS, significant profits can be obtained. The result of this research is the definition of implementation phases of a WMS, as well like the hoist of the system of information and operation of the warehouse before and after the implementation of WMS in the organization.
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Costa, Walter Antonio da Silva. "Proposta de etapas de implementação de WMS : um estudo de caso em um varejista moveleiro /." Bauru : [s.n.], 2008. http://hdl.handle.net/11449/93065.
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Orientador: José Alcides Gobbo JuniorBanca: Renato de Campos
Banca: Renato da Silva Lima
Resumo: Uma das etapas críticas da distribuição física está no gerenciamento e administração dos produtos que são armazenados em Centros de Distribuição (CD), ou seja, nas operações de recebimento do pedido, recebimento de mercadorias, controle de qualidade, movimentação de materiais, armazenagem, separação e expedição. São críticas, também, as informações relacionadas aos produtos como quantidade, prazo e a rapidez no atendimento aos pedidos. O Warehouse Management System (WMS) é um sistema especialista que gerencia operações de CD, buscando atender as necessidades inerentes dessa atividade. Dessa forma, muitas empresas adotam estes sistemas objetivando o aprimoramento das operações logísticas e do gerenciamento do CD. Vem ocorrendo nas empresas uma série de implementações de WMS em diversos segmentos. O setor moveleiro possui muitas particularidades no tocante a logística de armazenagem das mercadorias, tais como: tamanhos, geometrias e pesos bem diferentes; alta rotatividade de modelos; alta segmentação de produtos no CD com mesmo código de venda. O objetivo principal desta pesquisa é apresentar uma proposta de etapas para implementação de WMS em CD. Foi conduzido um estudo em uma empresa varejista de grande porte do setor moveleiro que foi uma das pioneiras na implementação do WMS. A empresa adotou em seu CD um WMS para atuar em conjunto com o sistema gestor (Enterprise Resource Planning - ERP) da organização. Considerando a literatura um pouco escassa e dispersa nesta área específica do conhecimento em âmbito nacional, procurou-se prover aos praticantes um estudo que demonstre que, com uma correta implementação e uso do WMS, significativos ganhos podem ser obtidos. O resultado desta pesquisa é a proposição detalhada de uma série de etapas para a implantação de WMS, bem como uma descrição do sistema de informação e operação do CD antes e depois da implementação do WMS da empresa focal.
Abstract: On of the critical phases of the physical distribution is the managemente and administration of products which are stored in warehouse, mainly in operations of order fulfillment. There are critical information related to products such as; quantity, time reliability and speed in the customer service. The Warehouse Management System (WMS) is a specialist system which manages the operations of warehouses, attempting to meet the inherent needs of these operations. This way, many companies adopt these systems aiming at the improvement of the logistics operations and the management of warehouses. There have been implementations of the WMS in several business segments. The furniture sector posses many particularities related to storage of goods, such as: geometries and different weights; high models turmaround; high segmentation of products in warehouse with the same sale code. The main objective of this research is present an implementation planning methodology of WMS in warehouses. It was driven a study of a large-scale retail company from the Braziliam furniture sector. The company adopted in their warehouse, a WMS to work together with the ERP of the organization. Considering the operational improvement potential, this study aims at providing the practitioners with a study which shows that, with a good implementation and correct use of the WMS, significant profits can be obtained. The result of this research is the definition of implementation phases of a WMS, as well like the hoist of the system of information and operation of the warehouse before and after the implementation of WMS in the organization.
Mestre
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GOULART, MARIANA BARBERO RIBEIRO. "THE IMPLEMENTATION OF A WMS, MOTIVATORS AND CRITICAL FACTORS: A CASE STUDY IN AN ENTERTAINMENT COMPANY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=28096@1.
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A crescente demanda pelo consumo e o maior nível de exigência dos consumidores em termos de qualidade de serviço, disponibilidade de produtos e tempo de atendimento influenciam na agressividade e competitividade dos mercados globais. Para arcar com as demandas e atender às expectativas, as empresas devem investir na sua cadeia de suprimentos em prol da sua resiliência e sobrevivência no mercado. A tecnologia da informação é uma forte aliada à logística para reduzir em custos, melhorar a qualidade de atendimento, aperfeiçoar processos e aumentar o controle sob a cadeia sem afetar os objetivos da empresa. As vantagens do WMS (Warehouse Management System - Sistema de Gerenciamento de Armazéns) incluem a otimização da gestão de estoque, dos processos e da tecnologia de um armazém. Há, entretanto, fatores críticos, riscos e desafios que afetam a complexidade e o sucesso das implantações de sistemas. O objetivo desta dissertação é realizar um estudo de caso sobre os principais motivadores que influenciam os gestores na decisão de adotar um WMS em seu armazém e sobre os fatores críticos enfrentados pela equipe do projeto de implantação de um WMS no armazém de uma empresa de entretenimento, visto que a autora fez parte da equipe do projeto e participou de todas as fases. Os resultados incluem: um comparativo entre os principais desafios vividos pela equipe de implantação, os fatores críticos mapeados na Revisão Bibliográfica sobre implantação de projetos e os riscos previstos pela própria equipe no início do projeto; e um levantamento de quais dos motivadores que influenciaram os gestores na decisão de adotar o sistema em seu armazém foram alcançados no fim do projeto.The growing demand for consumption and consumers higher demand level in terms of service and product quality influence the aggressiveness and competitiveness of global markets. To cope with consumers demands and meet their expectations, companies must invest in its supply chain to support their resilience and market survival. Information technology is a strong ally to logistics when it comes to reduce costs, improve service quality and processes and increase the control over the supply chain without affecting the company s goals. Among the advantages of the WMS (Warehouse Management System) there are the optimization of inventory management, processes and warehouse technology. There are, however, critical factors, risks and challenges that influence the complexity and the success of systems implementation. The aim of this work is to conduct a case study about the key drivers that influence managers in the decision to adopt a WMS in their warehouse and the critical factors faced by a project team that was part of the implementation of a WMS in the warehouse of an entertainment company. The authoress of this work was part of the project team and participated in all of its phases. The results include a parallel between the main challenges faced by the implementation team; the risks forecasted by the team at the beginning of the project; and the critical factors mapped in the Literature Review chapter about project implementation. The second outcome is a survey of which of the motivators that influenced managers in their decision to adopt the system in their warehouse were achieved in the end of the project.
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Fike, Lauren. "Cross-cultural normative indicators on the Wechsler Memory Scale (WMS) associate learning and visual reproduction subtests." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1002484.
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A comprehensive battery of commonly used neuropsychological tests, including the WMS Associate Learning and Visual Reproduction subtests, forming the focus of this study, were administered to a southern African sample (n = 33, age range 18-40). This sample composed of black South African, IsiXhosa speakers with an educational level of Grade 11 and 12, derived through DET and former DET schooling. The gender demographics were as follows; females n = 21 and males n = 12. This sample was purposefully selected based on current cross-cultural research which suggests that individuals matching these above-mentioned demographics are significantly disadvantaged when compared to available neuropsychological norms. This is due to the fact that current norms have been created in contexts with socio-cultural influences; including culture, language and quantity and quality of education distinctly dissimilar to individuals like that composed in the sample. Hence the purpose of this study was fourfold namely; 1) Describe and consider socio-cultural factors and the influence on test performance 2) Provide descriptive and preliminary normative data on this neuropsychologically underrepresented population 3) Compare test performance between age and gender through stratification of the sample and finally to 4) Evaluate the current norms of the two WMS subtests and assess their validity for black South Africans with DET and former DET schooling with comparisons to the results found in the study. Information derived from the statistical analyses indicated that a higher performance in favour of the younger group over the older age range was consistently found for both WMS subtests. With regards to gender, some higher means were evident for the male population in the sample than was produced by the female group. Lastly, due to the fact that most scores derived from the sample were considerably lower when compared to the available norms, it is felt that socio-cultural factors prevalent to this population are a significant cause of lower test performance and thus warrant the development of appropriate normative indicators.
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Ntwana, Bukiwe. "An assessment of the social consequences of water management devices on the poor in Samora Machel, Cape Town." Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/4142.
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Magister Administrationis - MAdminThis study assesses the social consequences of water management devices in poor households in Samora Machel, a poor urban area characterised by high levels of unemployment and poverty. South Africa is currently faced with an increase in the roll out of water management technologies, mainly in poor areas, allegedly to manage water demand and help poor households manage their water consumption and prevent wastage. The water management device (WMD) limits access to the free basic water (FBW) allocation and automatically cuts it off when the allocation is finished. In 2009/2010 the City of Cape Town started rolling out the devices in Samora Machel, which previously used the conventional water meter that supplied the area with unlimited water access. WMDs limit water access to 350 litres of FBW per day. People living in Samora Machel claim that 350 litres is not enough and they are experiencing problems of frequent water cuts even before the allocated litres are used up. There have also been water leaks ever since the installation of the devices. Section 27(1)(b) of the Constitution of the Republic of South Africa, Act 108 of 1996, entrenches the right of access to sufficient water. The WMDs are criticised for infringing the right of access to sufficient water supply to poor households by leaking, cutting off water supply frequently and by limiting access to FBW supply. Moreover, critics argue that the WMDs are not water-demand management mechanisms; they are cost-recovery mechanisms that are introduced under the neo-liberal policies introduced by the post-apartheid government in 1994. This criticism is based on the fact that the WMDs are implemented in poor areas only, where water is needed more for basic survival, rather than in high-income areas, where water is mostly used for luxury purposes.
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Nobre, Silvio da Silva. "INSPEÇÃO DE QUALIDADE NA SEPARAÇÃO DE PEDIDO: UM ESTUDO DE CASO EM UM CENTRO DE DISTRIBUIÇÃO." Pontifícia Universidade Católica de Goiás, 2015. http://localhost:8080/tede/handle/tede/2465.
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Previous issue date: 2015-04-14The Distribution Centers (DC) has embarked on a major role in the supply chain, to the extent that manage much of logistics that is implemented and controls the storage from its origin to its final point. Among the processes of a CD, is the shipment of product for subsequent separation. Distribution Centers implement the fractional separation (rack flow) have constantly problems conference output products, waste and increasing the quality of decreasing process. This work aims to analyze the quality of separation and inspection of rack flow of products on a CD in order to ensure the quality of delivery to the final consumer. One high error rate in the separation process and also inspection of products and proposed an alternative in the inspection process was detected for identify errors and correct them. The results showed that the proposed process and analyzed, based on a precision scale, decreased the return of errors and identified the inspection errors in order to practically zeroing them. In addition, based on the results, analyzed and proposed a modification of the separation process.
Os Centros de Distribuição (CD) vem empenhando um papel importante na cadeia de suprimentos, na medida que gerenciam grande parte de logística que é implementada e controla o armazenamento desde sua origem até ao seu ponto final. Dentre os processos de um CD, encontra-se o de separação de produtos para posterior expedição. Centros de Distribuição que implementam a separação fracionada (flow rack) apresentam, constantemente, problemas de conferência de produtos de saída, aumentando o desperdício e dminuindo a qualidade do processo. Este trabalho tem como objetivo analisar a qualidade da separação e inspeção dos produtos do flow rack em um CD, a fim de garantir a qualidade da entrega para o consumidor final. Foi detectado um alta taxa de erros no processo de separação e também de inspeção dos produtos e proposta uma alternativa no processo de inspeção para indentificar os erros e corrigi-los. Os resultados obtidos demonstraram que o processo proposto e analisado, baseado em uma balança de precisão, diminuiram os erros de devolução e identificaram os erros de inspeção de forma a praticamente a zerá-los. Além disto, baseados nos resultados, analisada e proposta uma modificação do processo de separação.
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Ekström, Johanna, and Stefan Emanuelsson. "Förstudie till implementering av papperslös verkstad." Thesis, Högskolan Väst, Institutionen för ingenjörsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4728.
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Under sommaren 2012 genomfördes ett examensarbete på Siemens Industrial Turbomachinery AB i Trollhättan gällande möjligheterna att införa papperslös verkstad. Syftet med examensarbetet var att kartlägga möjligheterna att minska administrativ hantering av produktionsorderkort och öka realtidsuppdatering. För att avgränsa studien avsåg examensarbetet endast flödet av produktionsorderkort ifrån planeringsavdelningen genom två produktionsgrupper och vidare in på godsavdelningen. För att kartlägga flödet för den manuella hanteringen av produktionsorderkort upprättades värdeflödesanalyser. Dessutom genomfördes ett studiebesök på Volvo Aero Corporation för att se hur ett annat företag har gjort för att eliminera elektronisk produktionsorder. Utifrån värdeflödesanalyserna och studiebesöket identifierades tre frågeställningar vilka ansågs vara betydelsefulla för att kunna införa elektronisk produktionsorder. Dessa var huruvida affärssystemet klarar av att hantera införande av elektronisk produktionsorder, hur spårbarheten av material skall bibehållas samt hur godsavdelningen skall få information om var detaljer skall förflyttas. För att besvara dessa frågor genomfördes 15 intervjuer med personal från Siemens Industrial Turbomachinery i Trollhättan, med personal från huvudkontoret i Finspång samt med personal från systemutvecklingsföretaget Else AB. Informationen från alla intervjuer samt studiebesöket på Volvo Aero Corporation belyser möjligheterna och problemen med att eliminera produktionsorderkorten och sammanställdes i en utvärdering. Denna utvärdering ligger till grund för kartläggningen av det framtida tillståndet, vilken visar ett tänkbart arbetssätt när produktionsorderkorten tagits bort och ersatts med elektronisk produktionsorder. Det som huvudsakligen belyses i det framtida tillståndet är att affärssystemet är förberett för elektronisk produktionsorder, dock rekommenderas införande av Warehouse Management System samt ett transportssystem. För att underlätta implementering av elektronisk produktionsorder skulle införande av ett webbaserat användargränssnitt vara lämpligt.
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SILVA, LIVIA FONSECA DE MEDEIROS. "THE IMPACT OF WAREHOUSE MANAGEMENT SYSTEM (WMS) ON THE LOGISTICS PERFORMANCE INDICATORS: IMPLEMENTATION IN PHARMACEUTICAL DISTRIBUTION CENTER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21339@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
A competitividade econômica tem levado as empresas a buscarem novas soluções através do uso de Tecnologia de Informação (TI) para alcançar vantagens competitivas frente a seus concorrentes. O uso da TI permite às empresas terem maior controle na gestão de seus processos e, com isso, obter ganhos de produtividade, redução de custos operacionais e satisfação dos clientes. O presente estudo tem como objetivo apresentar e analisar o processo de implementação de um Sistema de Gerenciamento de Armazéns – WMS em atividades logísticas em um centro de distribuição (CD). Será feito um estudo de caso, que consiste em uma avaliação pós-implementação do sistema em um centro de distribuição de medicamentos através de aplicação de um Sistema de Medição de Desempenho Logístico, a fim de identificar as melhorias e ganhos nas atividades de um armazém. Dentro desse contexto, são identificados também os riscos e as resistências na aplicação do WMS. A metodologia utilizada para esta dissertação é de natureza qualitativa, que consiste em revisão bibliográfica, e de caráter exploratório, mediante pesquisas de campo, visitas na empresa do estudo e entrevistas. O resultado deste estudo é uma análise da melhoria de desempenho após a aplicação do WMS, que constata vantagens da TI para a logística de distribuição como maior nível de acuracidade e redução de tempo.
The economic competitiveness has led companies to seek new solutions through the use of Information Technology (IT) to achieve competitive advantages over their competitors. The use of IT enables companies to have greater control in managing their processes and thereby achieve productivity gains, reduce operating costs and improve customer satisfaction. The present study aims to present and analyze the process of implementing a Warehouse Management System - WMS on logistics activities in a distribution center (DC). There will be a case study, consisting of a post-implementation review of the system in a distribution center for drugs through implementation of a Performance Measurement System Logistics in order to identify improvements and gains in the activities of a warehouse. Within this context, are also identified risks and resistance in the implementation of WMS. The methodology used for this thesis is qualitative in nature, consisting of a literature review, and exploratory character, through field research, visits to the company in the are study and interview. The result of this study is an analysis of performance improvement after applying WMS, noting advantages of IT for logistics distribution such as a higher level of accuracy and time reduction.
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Domeyer, Martin. "Implementierung eines Feature Portrayal Service." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-65471.
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Fundamentale Voraussetzung für alle professionellen Kartendienste ist die Möglichkeit zur Kontrolle der grafischen Präsentation. Aus diesem Grund besteht ein starker Bedarf an der visuellen Darstellung von Geodaten. Diese transformiert rohe Informationen in wichtige und entscheidungstragende Werkzeuge. Der Feature Portrayal Service (FPS) hat die Aufgabe, diese Anforderungen umzusetzen und damit wesentlich zur kartographischen Interoperabilität in Geodateninfrastrukturen beizutragen.
Der Dienst entstammt dem internationalen Standard SLD 1.1.0 (Styled Layer Descriptor). Es handelt sich um einen Darstellungsdienst, der die interoperable Nutzung von Vektor-Daten, also von so genannten Features, ermöglicht. Dieser spezielle Web Map Service hat die Aufgabe, Geodaten von beliebigen Web Feature Services sowie rohe GML-Daten in einer gewünschten grafischen Ausprägung zu präsentieren. Dabei ist der jeweilige Nutzer in der Lage, eigene Darstellungen zu definieren und auf einen beliebigen Datenbestand anzuwenden.
Datenquellen, Darstellungsvorschriften und der Feature Portrayal Service selbst sind insofern unabhängig voneinander, dass diese drei Komponenten auf verschiedenen und voneinander unabhängigen Servern liegen können. Diese Art der Implementierung bezeichnet man als Component WMS.
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Sundin, Lena. "Saving Lives With Geo-Spatial Web Standards : A Test Architecture for Evaluating the Possibility of Sharing Heterogeneous Data Among the Emergency Services." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19022.
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The emergency services in neighboring Jämtland, Sweden and Nord-Sør Trøndelag, Norway have identified a need to share data across department, municipality and country borders. A project is started to evaluate the possibility of sharing information through a common Web Geographic Information System (GIS). The data about resources at the various departments suffers from a high level of heterogeneity, fragmentation and protocol incompatibility. The Open Geo-Spatial Consortium (OGC) issue Web standards to harmonize the processing of geo-spatial data and promote interoperability between GIS systems. A test model based on the Thin Thread Model, emulating a potential final solution, is built to evaluate the usability of these Web standards in the situation. Successful test cases including CRUD operations and relatively smooth swapping of layer modules show that using well-established standards can be beneficial. A proposed architecture extending the test model presents the idea of a centralized proxy node and a meta data catalog. The study highlights the issue of responsibility and question of which authority should maintain centralized nodes. In order to successfully implement a Web portal, the project participants must from a technical point of view investigate how to access all desired data, agree on protocols for communication and ensure that each owner of data provides an API in agreement with the protocol. The OGC Web standards are proven a good option and focal point.
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Lambe, Derek. "WATER VAPOR AND CARBON DIOXIDE SPECIES MEASUREMENT IN NARROW CHANNELS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4022.
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A novel method has been implemented for measuring the concentration of gas species, water vapor and carbon dioxide, within a narrow channel flow field non-invasively using tunable diode laser absorption spectroscopy (TDLAS) in conjunction with a laser modulated at a high frequency [Wavelength Modulation Spectroscopy (WMS)] tuned to the ro-vibrational transition of the species. This technique measures the absorption profile which is a strong function of the species concentration across short path lengths and small time spans, as in PEM fuel cells during high load cycles. This method has been verified in a transparent circular flow 12 cm path length and a 12 mm rectangular flow channel. Distinct absorption peaks for water vapor and carbon dioxide have been identified, and concentrations of water vapor and carbon dioxide within the test cells have been measured in situ with high temporal resolutions. A comparison of the full width at half maximum (FWHM) of the absorption lineshapes to the partial pressure of water vapor and carbon dioxide showed a predominantly linear relationship, except in the lower partial pressure regions. Test section temperature was observed to have very minimal impact on these curves at low partial pressure values. A porous media like a membrane electrode assembly (MEA) similar to those used in PEM fuel cells sandwiched between two rectangular flow channels was also tested. Some of the scattered radiation off the MEA was observed using a photodiode at high gain, allowing for more localized species detection. The technique was used to monitor the humidity on either side of the MEA during both temperature controlled and super-saturated conditions. The measurements were observed to be repeatable to within 10 %.M.S.A.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Aerospace Engineering MSAE
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Van, der Merwe Zuann Stephanus. "A network traffic model for wireless mesh networks / Z.S. van der Merwe." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9229.
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Design and management decisions require an accurate prediction of the performance of the network. Network performance estimation techniques require accurate network traffic models. In this thesis we are concerned with the modelling of network traffic for the wireless mesh network (WMN) environment. Queueing theory has been used in the past to model the WMN environment and we found in this study that queueing theory was used in two main methods to model WMNs. The first method is to consider each node in the network in terms of the number of hops it is away from the gateway.
Each node is then considered as a queueing station and the parameters for the station is derived from the number of hops each node is away from the gateway. These topologies can be very limiting in terms of the number of physical topologies they can model due to the fact that their parameters are only dependent on the number of hop-counts each node is away from the gateway. The second method is to consider a fixed topology with no gateways. This method simplifies analysis but once again is very limiting.
In this dissertation we propose a queueing based network traffic model that uses a connection matrix to define the topology of the network. We then derive the parameters for our model from the connection matrix. The connection matrix allows us to model a wider variety of topologies without modifying our model. We verify our model by comparing results from our model to results from a discrete event simulator and we validate our model by comparing results from our model to results from models previously proposed by other authors. By comparing results from our model to results of other models we show that our model is indeed capable of modelling a wider variety of topologies.Thesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2013.
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Tourgeman, Isaac. "Exploration of the Wechsler Memory Scale Fourth Edition and Measures of Executive Function Combined Components Model." NSUWorks, 2015. http://nsuworks.nova.edu/cps_stuetd/86.
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While memory is the faculty that affords us learning, adaptation and development, it is our executive function that oversees, manages and organizes these abilities. Still, there is limited research on the interaction between memory and executive function. The present study investigated this relationship through Principal Components Analysis. Performances on accepted measures of memory and executive function were evaluated in an adult clinical sample. Components were retained using three criteria: a predetermined four-component structure, eigenvalues exceeding a value of one, and parallel analysis. Results demonstrated that a four-component model most accurately represented the data. Analyses also revealed that measures of immediate and delayed memory did not uniquely assess memory but instead loaded onto components associated with visual and verbal processing. The findings were shown to be in support of the brain working in an integrated, systematic manner in which abilities hierarchically ascend from arousal to tertiary function. Consequently, several accepted measures of memory and executive function failed to measure cognitive capacity unique from visual and verbal processing, placing their construct validity and efficacy in question.
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Шикура, А. Ю. "Автоматизація складської діяльності підприємства." Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65064.
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Kvist, Sebastian, and Richard Landén. "UTREDNING SAMT UTVECKLING AV ETT PLATTFORMSOBEROENDE GEOGRAFISKT INFORMATIONSSYSTEM." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-18841.
Full textAbstract:
This thesis have been performed at Sweco Position in Jönköping. The work was split into two, where one part included an investigation regarding the possibility of developing a cross-platform GIS (geographic information system) with HTML5 and CSS3. A prototype would also be developed within this part. The second part included development of a cross-platform GIS for a client to Sweco Position. The client operates in the forest sector and had already an existing solution, with many problems. The client required an application with delimited functionality and which was not bound to a specific hardware. As the client users often were located in areas with limited Internet access, one additional requirement was that there would be some offline support. The students handle subjects within development of GIS, for example map projections, map services and mapping libraries. The application came to be developed in HTML5 and ASP.net. The mapping library that was used, was Leaflet 0.3.1. The result of this thesis is a cross-platform GIS with offline support. Examples of functionality included is to log positions manually, execute an automatic log function and support for managing which layers and logs that should be visible in the interface.Detta examensarbete har utförts på företaget Sweco Positon i Jönköping. Arbetet var tudelat, där den ena delen omfattade en utredning kring möjligheterna att utveckla ett plattformsoberoende GIS(geografiskt informationssystem) med HTML5 och CSS3. För denna utredning skulle även en prototyp tas fram. Den andra delen omfattades av utvecklingen av ett plattformsoberoende GIS åt en kund till Sweco Position. Kunden verkar inom skogsbranschen och hade en redan befintlig lösning med många problem. Denne ville få fram en applikation med avgränsad funktionalitet och som ej heller var bunden till någon specifik hårdvara. Då kundens användare ofta befann sig i områden med tveksam uppkoppling, krävdes även ett visst offlinestöd. Studenterna går bland annat igenom delar som berör utveckling av GIS i form av kartprojektioner, karttjänster och kartkomponenter. Kartlösningen skulle komma att utvecklas i HTML5 samt ASP.net. Den kartkomponent som användes i projektet var Leaflet 0.3.1. Resultatet av examensarbetet är ett plattformsoberoende GIS med offlinestöd. Exempel på funktionalitet är att logga manuella punkter, exekvera autologgning samt hantera visning lager och sparade loggar.
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Björklund, Thomas, and Christer Wahlund. "GIS-IMPLEMENTATION AV BING MAPS TILL WINDOWS 8 OCH WINDOWS PHONE 8." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-21978.
Full textAbstract:
This thesis has been performed at consulting firm Sweco Position in Jönköping. The thesis is divided into two main sections: theoretical and practical. The theoretical section contains an investigation into the possibilities of implementing a geographical information system (GIS) for administrations of wells with the integration of Bing Maps for Windows 8 and Windows Phone 8. The practical work comprises the development of a prototype for Windows 8 and Windows Phone 8. The students review the Model-View-ViewModel-pattern on a theoretical basis, compares the differences between Windows 8 Pro and Windows RT. The thesis also contains and investigation into the pros and cons of a web based application compared to a native one. The result of the thesis will be comprised of a GIS-service developed in C# in co-operation with XAML with the options of saving data locally and a WMS-based service layer for Windows 8 and Windows Phone 8.Detta examensarbete har utförts på konsultbolaget Sweco Position i Jönköping. Arbetet har varit uppdelat i två större delar: teoretiskt och praktiskt arbete. Teoretiska delen omfattade en utredning kring möjligheterna att implementera ett geografiskt informationssystem (GIS) för administration av brunnar med hjälp av Bing Maps tillsammans med Windows 8 och Windows Phone 8. Praktiska arbetet omfattade skapandet av en prototyp till Windows Phone 8 och Windows 8. Studenterna går bland annat genom Model-View-ViewModel-mönstret på en teoretisk nivå, beskriver skillnaderna mellan Windows 8 Pro och Windows RT. Ett utredande om för och nackdelar vid utveckling av webbaserade applikationer och native-applikationer. Resultatet av examensarbetet kommer innefatta en GIS-lösningen utvecklad i C# i samverkan med XAML och omfatta lokalt sparad data med WMS-tjänst baserad interaktion till Windows 8 och Windows Phone 8.
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Catacora, Contreras Eudomar Grover. "Diseño, fabricación y programación de un sistema WMSN prototipo de cámaras trampa como herramienta para realizar inventarios de mamíferos mayores en el marco del Proyecto Tapirchip." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2020. http://hdl.handle.net/20.500.12404/17520.
Full textAbstract:
La presente tesis plantea el diseño, fabricación y programación de un sistema WMSN prototipo
de cámaras trampa de bajo consumo energético y de alta resolución basado en hardware de
código abierto e integrado con un sistema de comunicación inalámbrica que sirve como
herramienta para realizar inventarios de mamíferos mayores. En el capítulo 1, se expone el
contexto actual de la biodiversidad peruana, se profundiza en el concepto de inventario de fauna
silvestre enfatizando su importancia como instrumento generador de información actualizada
y confiable sobre la diversidad de especies. Finalmente, se explica la importancia y los
objetivos de la presente tesis. En el capítulo 2, se describe a las cámaras trampa; en cuanto a su
evolución, sus características técnicas, su funcionamiento, sus ventajas, desventajas y su
desempeño como dispositivos de recolección de datos. Por otro lado, se profundiza en el
concepto de redes de sensores inalámbricos (WSN) y cómo estas proveen comunicación
inalámbrica a las cámaras trampa, también llamados nodos sensores. En el capítulo 3, se
definen los tipos de nodos sensores (nodo sensor sumidero y nodo sensor trampa) que
conforman la WMSN prototipo de cámaras trampa. Finalmente, se detalla la programación del
código de cada uno de los nodos sensores que conforman la WMSN mediante su flujo de
funcionamiento. En el capítulo 4, se muestran los resultados de las pruebas de consumo de
energía de los nodos sensores. Por otro lado, se exponen los resultados de pruebas de
rendimiento de red en función a los indicadores RSSI, packet data rate y throughput.
Finalmente, se detalla el tiempo de captura de imagen desde que se activa el sensor PIR hasta
que la imagen es almacenada en la memoria.Tesis
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Tichonovas, Tomas. "Sandėlio valdymo sistema „Maelstrom“." Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130821_131617-79434.
Full textAbstract:
Sukurta firmai „West END Knitwear Ltd.“ Sandėlio vadymo sistema „Maelstrom“. Ši programą optimizuoja įmonės darbą pateikdama ataskaitas apie produkciją bei darbuotojų veiksmus. Darbas atliktas optimizuojant programą pagal tam tikras, darbe aprašytas taisykles.Warehouse Management System “Maelstrom” is created for “West END Knitwear Ltd.” Company. This program optimizes company's work by providing accurate reports on sales and employees actions. Also it was done in an efficient way by following some rules that were defined in this work.
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Rydén, Magnus. "Strategic Placing of Field Hospitals Using Spatial Analysis." Thesis, KTH, Geoinformatik och Geodesi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34292.
Full textAbstract:
Humanitarian help organisations today may benefit on improving their location analysis when placing field hospitals in countries hit by a disasters or catastrophe. The main objective of this thesis is to develop and evaluate a spatial decision support method for strategic placing of field hospitals for two time perspectives, long term (months) and short term (weeks). Specifically, the possibility of combining existing infrastructure and satellite data is examined to derive a suitability map for placing field hospitals. Haut-Katanga in Congo is used as test area where exists a large variety of ground features and has been visited by aid organisations in the past due to epidemics and warzones. The method consists of several steps including remote sensing for estimation of population density, a Multi Criteria Evaluation (MCE) for analysis of suitability, and visualization in a webmap. The Population density is used as a parameter for an MCE operation to create a decision support map for locating field hospitals. Other related information such as road network, water source and landuse is also taken into consideration in MCE. The method can generate a thematic map that highlights the suitability value of different areas for field hospitals. By using webmap related technologies, these suitability maps are also dynamic and accessible through the Internet. This new approach using the technology of dasymetric mapping for population deprival together with an MCE process, yielded a method with the result being both a standalone population distribution and a suitability map for placing field hospitals with the population distribution taken into consideration. The use of dasymetric mapping accounted for higher resolution and the ability to derive new population distributions on demand due to changing conditions rather than using pre-existing methods with coarser resolution and a more seldom update rate. How this method can be used in other areas is also analysed. The result of the study shows that the created maps are reasonable and can be used to support the locating of field hospitals by narrowing down the available areas to be considered. The results from MCE are compared to a real field hospital scenario, and it is shown that the proposed method narrows down the localisation options and shortens the time required for planning an operation. The method is meant to be used together with other decision methods which involves non spatial factors that are beyond the scope of this thesis.
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Кіндя, Валерій Ілліч, Валерий Ильич Киндя, Valerii Illich Kindia, and A. V. Belogubets. "A development of standart content of the main chemical compounds for production of whole milk substitute (WMS) with the inclusion of biotech products." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/41231.
Full textAbstract:
Nature has created the best food for newborn mammals - mammary secretion (colostrum, milk). Milk is a complex product; not only because of the fact that it contains about 250 individual chemical components, but also due to the content variation created during lactation. It is well known that Lactation to some extent is a "continuation" of pregnancy; the chemical composition of milk changes to meet the needs of a growing newborn.
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Alibabaei, Navid. "Wireless Mesh Networks: a comparative study of Ad-Hoc routing protocols toward more efficient routing." Thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1023.
Full textAbstract:
Each day, the dream of seamless networking and connectivity everywhere is getting closer to become a reality. In this regard, mobile Ad-Hoc networks (MANETs) have been a hot topic in the last decade; but the amount of MANET usage nowadays confines to a tiny percentage of all our network connectivity in our everyday life, which connectivity through infrastructured networks has the major share. On the other hand, we know that future of networking belongs to Ad-Hocing , so for now we try to give our everyday infrastructure network a taste of Ad-Hocing ability; these types of networks are called Wireless Mesh Networks (WMN) and routing features play a vital role in their functionality. In this thesis we examine the functionality of 3 Ad-Hoc routing protocols known as AODV, OLSR and GRP using simulation method in OPNET17.5. For this goal we set up 4 different scenarios to examine the performance of these routing protocols; these scenarios vary from each other in amount of nodes, background traffic and mobility of the nodes. Performance measurements of these protocols are done by network throughput, end-end delay of the transmitted packets and packet loss ratio as our performance metrics. After the simulation run and gathering the results we study them in a comparative view, first based on each scenario and then based on each protocol. For conclusion, as former studies suggest AODV, OLSR and DRP are among the best routing protocols for WMNs, so in this research we don’t introduce the best RP based on the obtained functionality results, instead we discuss the network conditions that each of these protocols show their best functionality in them and suggest the best routing mechanism for different networks based on the analysis from the former part.
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Norén, Edvin. "Simultaneous detection of potassium, water vapor and temperature with tunable diode laser absorption spectroscopy." Thesis, Umeå universitet, Institutionen för fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105950.
Full textAbstract:
Existing tunable diode laser absorption spectroscopy (TDLAS) sensors for potassium (K) and for water vapor (H2O) and temperature were combined to enable simultaneous measurements in combustion and gasification processes. In-situ real-time detection of the above mentioned combustion parameters will improve the understanding of ash-formation during thermochemical conversion of biomass. Simultaneous measurements facilitate the experimental procedure and decrease the methodological uncertainty introduced by the heterogeneous nature of the pellets. The K sensor is based on direct absorption spectroscopy (DAS), whereas the H2O system employs wavelength modulation spectroscopy (WMS) together with two-line thermometry for temperature assessment. Two methods for combining the laser beams were evaluated, the first involving dichroic elements, the second using available fiber optic combiners. The latter method was considered advantageous. An existing LabVIEW program was modified to allow for simultaneous signal generation and data acquisition for both sensors. The sensors were then tested separately in a low pressure K cell and in ambient air. The combined sensor was applied to simultaneous measurements above various pelletized biofuels during combustion in a single pellet reactor (SPR). Significant difference in absolute concentration and time histories were observed between fuels, in particular for K and temperature. Significant K concentrations were only observed during the devolatilization phase. The combined sensor will be useful in fundamental combustion research.