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  • 501.
    Yemane, Berhane
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Karlsson, Mikael
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Utveckling av sökmotor med ranksystem2010Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This paper is a collaboration with the company Sverige-Norge. Their business concept is to connect Swedish manpower to Norwegian employers. The emphasis of this work is to enhance the existing system they use to find Swedish employees to Norwegian employers. The old system was based on manually selecting candidates for possible job-openings. This was done by handpicking the candidates from the database. However this was not efficient but time-consuming and thereby expensive.

    The solution to prevent inefficiency was to create a search-engine. A search-engine would allow employers to find their suitable candidates, without the intervenience of the administration. In order to give an accurate search result, a grading system was requested for each candidate. A grading system would give the employer the benefit to see how well each candidate is suitable for the job-offering. The result was a fully functional search engine with a grading system based on experiences of the candidates.

     

    The paper has the following structure order:

     

    • Introduction
    • Theoretical background
    • Implementation
    • Result
    • Discussion and Conclusion
    • Appendix
    • References

    This is a thesis paper held in Technical University of Jönköping, Sweden. The major of which the paper is written in is Communication and Information Technology.

     

    Key words

    ASP

    ASP.NET

    C#

    Database engineering

    System development

  • 502.
    Yousaf, Imran
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    MAC SCHEDULING IN INDUSTRIAL WIRELESS CELL-BASED MESH SENSOR NETWORKS2011Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Undergoing developments for the adaptation of Wireless Sensor Networks (WSNs) in automation industry is creating several research questions. The usage of wireless technologies in industrial environments requires real-time reliability and security. Many standards for WSNs and Industrial Wireless Sensor Networks (IWSNs) have been developed. The list includes WirelessHART [4], ISA100.11a [10], Zigbee [16], IEEE 802.15.4, and IEEE 802.15.4a etc.Recently a new network topology “Cell-Based Mesh Networks” [12] has been developed in an effort to make IWSNs feasible for large scale deployments in process automation industries. Cell-Based Mesh Network topology inherits the qualities of star-mesh topology and mesh topology, and also offers many additional features.Reliability of an IWSN significantly depends on the real-time scheduling of the network. During this thesis work a scheduling mechanism has been developed by exploiting the features of a Cell-based Mesh Network. The idea of superframes’ further partitioning into time-cells of 100ms duration is presented, these 100ms time-cells guarantees interlocking data transmission [9] within 100ms. The closed loop control data [9] transmission is guaranteed by assigning dedicated time-slots. The performance evaluation of the presented scheduling mechanism is done by considering two case studies i.e. oil-industry and paper & pulp industry.

  • 503.
    Youssefi, Masoud
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Andersson, Patrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Hemsida för ett musikbolag: Website for a music company2007Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats
    Abstract [en]

    The purpose of this report is to answer the question:

    How do you create a media player that can stream music for a website?

    We started the work by searching the web and reading books about the subject

    and found several technologies to use to stream media files over the internet.

    We decided upon using the http protocol and created the media player itself in

    Macromedia Flash.

    The website is mostly developed with PHP, JavaScript and CSS templates and

    the websites design was created with Macromedia Dreamweaver and Adobe

    Photoshop. We also created an administrative system for the media player with

    PHP programming.

    The website contains a simple guestbook; the guestbook makes use of a

    database created with MySQL.

    Our work resulted in a webpage with a fully functional media player that

    streams audio files together with a corresponding administrative system for it.

  • 504.
    Zapata, César
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Jakobsen, Christoffer
    Feasibility Study of a Plug-in Based Architecture for Mobile Blogging2007Självständigt arbete på grundnivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Det finns inget standardformat för att posta ett blogginlägg, vilket resulterar i att många olika web feed-format och APIer används. Det här examensarbetet angriper problemet genom att undersöka om det är genomförbart att utveckla

    en plug-inbaserad arkitektur för en applikation till mobiltelefoner, som är kompatibel med flera olika bloggtjänster.

    Under studiens gång definierade vi vad termen genomförbart skulle innebära, baserat på krav från olika intressenter. Sex modeller som uppfyllde definitionen utvecklades och jämfördes. En av dessa valdes ut för att användas som grund

    för en prototyp. Prototypfasen avsåg att bevisa om arkitekturen kunde implementeras i en mobil miljö. Studien visade att det är genomförbart att utveckla en plug-inbaserad arkitektur för att lösa problemet, dock med några begränsningar på grund av beroende av bibliotek för strömmande XMLtransformationer som ännu inte implementerats i J2ME.

  • 505.
    Zhang, Tingting
    et al.
    Department of Information Technology and Media, Mid Sweden University.
    Österberg, Patrik
    Department of Information Technology and Media, Mid Sweden University.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system. Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Multicast-Favorable Max-Min Fairness: A General Definition of Multicast Fairness2005Ingår i: Proceedings - First International Conference on Distributed Frameworks for Multimedia Applications, DFMA '05, Besancon, France, 6-9 Feb. 2005., IEEE , 2005, s. 239-245Konferensbidrag (Refereegranskat)
  • 506.
    ZHANG, YAFAN
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Experimental and CFD Evaluation of Humidity Management Methods of Ruggedizing a COTS Electronics System for a Severe Climatic Environment2007Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [en]

    This master thesis is about an investigation of anti-moisture methods for a nonhermeticelectronics enclosure containing a number of printed circuit boards(PCB) and placed in a severe climatic environment.

    The relevant theoretical background was provided first. It included the impact of moisture on electronics, some useful psychrometrics concepts, heat transfer fundamentals, introduction of environmental test, temperature and humiditysensing techniques, computational fluid dynamics (CFD) modelling, antimoisture methods and commercial heaters in the current marketing.

    Then a CFD modelling methodology was developed and validated based on experiment data. An extra heater was added to the enclosure to prevent water adsorption on printed circuit assemblies (PCA) surfaces. The heat dissipation and switch-on period strategies were parametrically studied in order to maintain the internal relative humidity below 60% in the vicinity of PCA surfaces, according to the relative humidity control method.

    In the end, results obtained from the environmental tests and the CFD simulations were presented and analyzed. Conclusions and future work were also discussed.

  • 507. Åhlfeldt, H.
    et al.
    Larsson, O.
    Holm, J.
    Vieider, C.
    Bäcklin, L.
    Ericson, T.
    Nilsson, M.
    Buchta, R.
    Johansson, Å.
    Adomat, M.
    Svensson, M.
    Leisner, Peter
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Haglund, J.
    Bodö, P.
    Low-Cost Packaging of Fiber Optics Components: Optoelectronics Meets Micromechanics, Love at First Sight!1998Ingår i: Optik i Sverige: Stockholm, 1998Konferensbidrag (Refereegranskat)
  • 508. Öberg, Lasse
    et al.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system. Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    A Complete Energy Dissipation Model for Wireless Sensor Networks2007Ingår i: Proceedings of the international conference on sensor technologies and applications, SENSORCOMM, Valencia, Spain, October 14-20, 2007, IEEE , 2007, s. 531-540Konferensbidrag (Refereegranskat)
  • 509.
    Öberg, Lasse
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system. Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Link Quality-Aided Flooding: A Simple Protocol for Efficient Flooding in Wireless Sensor Networks2006Ingår i: Proceedings of Swedish National Computer Networking Workshop 2006, October 26-27, 2006, Luleå University of Technology, Sweden, Luleå: Luleå tekniska universitet , 2006, s. 93-96Konferensbidrag (Refereegranskat)
    Abstract [en]

    Wireless sensor networks provide distributed sensing and processing to a wide range of applications that operate in different environments. The sensor nodes are small in size, inexpensive, resource constrained and usually densely deployed in the target area. To be able to perform their intended duties, one of which is relaying information to other nodes in the network, a routing protocol is needed. In this paper we present an efficient flooding protocol called link quality-aided flooding (LQAF) with a new dynamic delay function. The dynamic delay function uses the link quality to decide the rebroadcasting delay. This lowers the contention of the wireless medium and also reduces some unnecessary transmissions. The results show that the number of rebroadcasting nodes are lower using this protocol when compared to the other methods used. However, in low density networks the reachability of LQAF is lower than the other methods. But as the network density increases so does the reachability and in high density networks the reachability is close to one. It is also shown that this protocol has the lowest energy consumption compared with the other protocols. These results make it a good candidate for dense wireless networks with resource constrained nodes.

  • 510.
    Öberg, Lasse
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system.
    Poster Abstract: A Complete Energy Model for Wireless Sensor Networks2006Ingår i: European conference on Wireless Sensor Networks 2006, 2006Konferensbidrag (Övrigt vetenskapligt)
  • 511.
    Öberg, Lasse
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system. Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Prioritising bad links for fast and efficient flooding in wireless sensor networks2007Ingår i: Proceedings of the international conference on sensor technologies and applications, SENSORCOMM 2007, Valencia, Spain, October 14-20, 2007, IEEE , 2007, s. 118-126Konferensbidrag (Refereegranskat)
  • 512.
    Öberg, Lasse
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system.
    Xu, Youzhi
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system.
    Nohre, Ragnar
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Robusta inbyggda system. Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    A Simple Router-Supported Congestion Control Scheme for Multiresolution Multicasting2004Ingår i: The Second Swedish National Computer Networking Workshop, SNCNW 2004, Karlstad University, Sweden, 23-24 November, 2004, 2004, s. 143-147Konferensbidrag (Refereegranskat)
    Abstract [en]

    For multimedia communication with multiple end users, the multicast distribution technique offers a bandwidth efficient solution compared to unicast. One of the most promising multicast approaches to date is the multiresolution multicast framework, which deals with the heterogeneity problems in IP-networks. It does not however deal with the congestion control issue, that higher priority packets can be dropped before lower priority ones. To deal with this problem router-support in the network is needed. Most of the proposed multi-rate routersupported schemes have complexity problems, in terms of memory and processing time requirements. In this paper, we propose a simple router-supported scheme, based on priority dropping that is further enhanced by combining it with receiver-driven layered multicast. This combination filters lower priority packets, and lets the receiver adjust the layer subscription rate. The routers do not need to maintain extra state information and no signaling is necessary between routers. Simulation results indicate a much better received picture quality compared with receiverdriven layered multicast during rate convergence.

  • 513.
    Öhgren, Annika
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Developing an Ontology for Wood-related Industry: An Experience Report2004Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Ontologies are widely used as a technique for representation and reuse of knowledge. This paper summarizes experiences and results of a project within ontology development, with wood-related industry as application sector. One major aspect of the project was the selection of a suitable methodology for ontology development. In a literature study existing methodologies were analyzed with respect to their suitability for small-scale application contexts. As no existing methodology was fully adequate, an improved methodology was proposed. The main intention was to reduce development time and effort to meet the demands of small-scale application contexts. The improved methodology was applied and evaluated in the project, i.e. in the development of an ontology for wood-related industry. The main conclusion is that the methodology was adequate for the project, but some aspects could be elaborated and further investigated, such as reuse of already existing ontologies.

  • 514.
    Öhgren, Annika
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Ontology Development and Evolution: Selected Approaches for Small-Scale Application Contexts2004Rapport (Övrigt vetenskapligt)
    Abstract [en]

    This report presents a literature study concerning three areas, Ontology Development Methodologies, Ontology Evolution, and Ontologies in Small and Medium-Sized Enterprises. The objectives were to find out and summarize what has been done so far in the different areas, as well as to find out what has not yet been done, and thereby discover new possible research areas. Ontologies are widely used as a technique for representation and reuse of knowledge. We believe that ontologies can be used in small and medium-sized enterprises and help companies by supporting knowledge sharing, reuse of knowledge, inter-operability, and much more. The main conclusion is that a lot of work has been put into Ontology Development, many methodologies are very mature and have been used in practice. Still, not all of them cover the aspects we are interested in, e.g. reuse of already existing ontologies and covering the whole life cycle. In Ontology Evolution, the main focus is on keeping an ontology and its dependents consistent, and it does not concern when to make changes, or what to actually change. Ontology use in small and medium-sized enterprises is not so common, but some experiences exist.

891011 501 - 514 av 514
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