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  • 1601. Alm, Håkan
    et al.
    Svidén, Ove
    Statens väg- och transportforskningsinstitut, VTI.
    Waern, Yvonne
    Statens väg- och transportforskningsinstitut, VTI.
    On Cognitive Integration of IVHS Functions around the Driver's Task1994In: Proceedings of the 12th Triennial Congress of the International Ergonomics Association: Comptes rendus du 12e Congrès triennal de l'association internationale d'ergonomie, Toronto, Canada, August 15-19, 1994 / [ed] Sharon McFadden, Human Factors Association of Canada , 1994, p. 189-191Conference paper (Refereed)
  • 1602. Alm, Håkan
    et al.
    Svidén, Ove
    Wærn, Yvonne
    Cognitive IVHS: on cognitive integration of IVHS functions around the driver's task2008Report (Other academic)
  • 1603. Alm, Håkan
    et al.
    Verwey, Willem B.
    Luleå tekniska universitet.
    Designing the car of the future: concurrent telephoning and presentation of tactile anti-collision messages1992Report (Other academic)
  • 1604. Alm, Håkan
    et al.
    Verwey, Willem B.
    Luleå tekniska universitet.
    Designing the car of the future: II: concurrent presentation of familiar messages in the auditory and tactile modalities1993Report (Other academic)
  • 1605. Alm, Håkan
    et al.
    Vogel, Katja
    Swedish National Road and Transport Research Institute.
    Kircher, Albert
    Swedish National Road and Transport Research Institute.
    Nilsson, Lena
    Swedish National Road and Transport Research Institute.
    Traffic sense: which factors influence the skill to predict the development of traffic scenes?2003In: Accident Analysis and Prevention, ISSN 0001-4575, E-ISSN 1879-2057, Vol. 35, no 5, p. 749-762Article in journal (Refereed)
    Abstract [en]

    A study was conducted to evaluate the skill to predict the development of traffic situations. A stop-controlled intersection was filmed over several days, and 12 scenes with varying traffic complexity were selected. In half of the scenes, the traffic rules were violated, in half of the scenes, the rules were observed. A total of 36 participants were asked to watch the scenes and predict how the scene would most likely develop in the 2 s after the film was paused. Additionally, the participants rated how certain they were about their prediction, and how complex and dangerous they assessed the scenes to be. With the method used here, experienced drivers were not found to make more correct predictions of situational development, and no difference in skill to predict could be found between genders. Nevertheless, more experienced drivers were more certain in their judgements and evaluated the situations on average as less complex and dangerous than did less experienced drivers. Scenes in which the traffic rules were violated were more difficult to predict correctly. The scenes in which the participants predicted violations were rated as more complex and dangerous. It is concluded that the low-cost method used here is more useful for examining which scenes are generally easy or difficult to predict and how they are experienced subjectively than to investigate differences in performance for different driver categories.

  • 1606.
    Alm, Irma
    Luleå tekniska universitet.
    Effects of biased mass media exposures on recall and ability to separate sources of information1987Licentiate thesis, monograph (Other academic)
  • 1607.
    Alm, Irma
    Luleå tekniska universitet.
    Newspaper reports: do they influence remembering of the main session material?1990Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The present thesis was aimed at investigating whether pre-exposure to biased newspaper reports influences remembering of the main session material. In general, the results show that remembering of the main session material varies as a function of the pre-exposure to the biased newspaper reports. It seems that pre-exposure to newspaper reports facilitates the accessibility of the main session items. However, recognition of the main session material in general seems to decrease when the participants are pre-exposed to newspaper reports written in order to discredit the defendant, whereas pre-exposure to newspaper reports written in favour of the defendant seem to facilitate recognition of the main session material. It Was suggested that the various schema activated on basis of the biased newspaper reports produced the effects obtained. Further, the ability to distinguish the various sources of information decreased when additional information (i.e., interference) was introduced. Some of the results obtained inquire previous views on expertise and prior knowledge and are discussed further. Moreover, the limits to generalizability are also discussed.

  • 1608. Alm, Jaana
    Jag vet allt om jag: elevers uppfattning av identitet via fenomenografisk elevtextanalys2009Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 1609. Alm, Joacim
    Rörlig grafik: ett sätt att engagera användare2006Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 1610. Alm, Joacim
    et al.
    Öquist, Sofia
    Bredbandstelevisionens hot och möjligheter2005Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 1611. Alm, Linda
    et al.
    Berglund, Stina
    Öhmark, Lina
    Att utveckla förskolebarns kommunikativa kompetens med drama som metod2002Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 1612. Alm, Love
    Development of Laser-Induced Breakdown Spectroscopy for Analyzing Rinds and Layered Structures in Martian Rocks2011Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Laser-induced breakdown spectroscopy (LIBS) offerers the possibility to study rinds and layered structures in a sample by creating a crater by employing repeated laser ablation. Previous studies have shown that the existence of craters can cause significant changes in both the thermal properties and the composition of the plasma. The occurrence of contributions to the plasma thorough plasma-crater interactions was studied for Martian atmospheric conditions using a sample consisting of a dolomite slab covered by an aluminum foil. The experiment showed that significant amounts of aluminum was present in the plasma after the laser had penetrated the foil completely. In four craters of different depth and a diameter of 1400 μm the aluminum content of the plasma was significantly lower when using a 600 μm beam diameter for spectral acquisition as compared to when using a 1400 μm beam. Additionally the differential penetration due to the Gaussian shape of the beam intensity profile was found to be a complicating factor by reducing the depth resolution of the LIBS measurement. The change in the composition of the plasma due to elemental fractionation was studied by observing the intensity of selected Al, Ca, Fe, K, Mg, Na and Si emission lines throughout crater formation. A homogeneous basalt slab was analyzed under Martian atmospheric conditions. Only Mg and Na exhibited a change in line intensity throughout the crater formation that is large enough to indicate a change in the composition of the plasma. When acquiring spectra using a beam with a diameter of 600 μm in craters with a diameter of 1400 μm the rate of change in line intensity for the different elements were not significantly different from the reference values. The conclusion is that using different two beam diameter, a larger for crater formation and a smaller for spectral acquisition improves the ability to separate between different layers in the sample without increasing the problem of changes in fractionation.

  • 1613.
    Alm Lönnefjord, Jonathan
    et al.
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Johansson, Robert
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Global project alignment and performance: Combining Chinese and Western management practices2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Purpose – The research purpose is to add insights to the project management literature by studying a global project encompassing Chinese and Western project participants, to possibly increase the understanding of how project alignment can be achieved.

    Method – The analytical approach for this abductive and explorative study was anchored in a six-phase thematic analysis (Clarke & Braun, 2014). A single-case study approach was used encompassing 17 interviews and 61 days of observations at a multinational manufacturing firm in China. 

    Results - Both Chinese and Western project managers consider project effectiveness and efficiency when evaluating project success. However, there are several key nuances that separate the two groups, as Western project managers focus on customer satisfaction through efficient methods when evaluating project performance, whereas Chinese project managers focus on internal satisfaction through effective methods. The different viewpoints although similar affect the ability of manufacturing organizations to achieve alignment within global projects. To achieve alignment within global projects manufacturing organisations need to focus on three types of alignment while accounting for the nuanced view on project success; objective alignment, role alignment and internal alignment.

    Theoretical implications – Our study proposes an emergent model reducing the complexity of achieving alignment in global projects. The model contains three new types of alignment (objective, role and internal) that are actionable and direct compared to previous alignment types. The alignment types aids in the unification of Chinese and Western project managers view on project success.

    Practical implications – We expand the understanding of the Chinese and Western view on project success and provide insight into how alignment can be achieved in global projects. Our findings suggest that project managers should first achieve objective alignment before addressing role and later internal alignment in efforts to increase project performance. 

  • 1614. Alm, Marie
    et al.
    Olofsson, Marianne
    Sjuksköterskors upplevelser av att stödja personer med fetma till livsstilsförändringar2008Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 1615.
    Alm, Ove
    Luleå tekniska universitet.
    Effects of water on the mechanical propreties and micro-strucures of granitic rock at high pressures and high temperatures1982In: Issues in rock mechanics: proceedings Twenty-Third Symposium on Rock Mechanics ; the University of California, Berkeley, California, August 25 - 27, 1982 / [ed] Richard E. Goodman, New York: Society of Mining Engineers of the American Institute of Mining, Metallurgical and Petroleum Engineers , 1982, p. 261-269Conference paper (Refereed)
  • 1616.
    Alm, Ove
    Luleå tekniska universitet.
    Experimental deformation of granitic rocks1981In: Vol. 103, no 1, p. 134-136Article in journal (Refereed)
  • 1617.
    Alm, Ove
    Luleå tekniska universitet.
    Experimental deformation of mylonitic rocks: results presented at the International Conference on the Effect of Deformation on Rocks, Göttingen, April 9-12, 19801980Report (Other academic)
  • 1618.
    Alm, Ove
    Luleå tekniska universitet.
    Fine-grained granitic rocks experimentally deformed at high temperatures and high pressures1977Report (Other academic)
  • 1619.
    Alm, Ove
    Luleå tekniska universitet.
    Influence of water on the strength and deformation properties of a granitic aplite at high pressures and temperatures1979Report (Other academic)
  • 1620.
    Alm, Ove
    Luleå tekniska universitet.
    Mechanical testing of powders and powder compacts1983In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 12, no 6, p. 302-311Article in journal (Refereed)
    Abstract [en]

    Results from standard triaxial, uniaxial and bending tests are presented. Triaxial tests were performed at pressures in the range 0-200 MPa. Both initial loose powder samples and cylindrical precompacted specimens were studied under hydrostatic conditions. Most of the total volume compaction occurred at pressures below 10 MPa. Triaxial tests with superimposed axial loads showed no softening despite a 30% shortening of the length of specimens which initially were 60 mm long. Specimens deformed in triaxial tests showed a higher density and a higher uniaxial compressive strength than specimens compacted under hydrostatic conditions

  • 1621.
    Alm, Ove
    Luleå tekniska universitet.
    The effect of water on the mechanical properties and microstructures of granitic rocks at high pressures and high temperatures1982In: Issues in rock mechanics: twenty-third Symposium on Rock Mechanics, the University of California, Berkeley, California, August 25-27, 1982 / [ed] Richard E. Goodman; Francois E Heuze, Society of Mining Engineers of the American Institute of Mining, Metallurgical and Petroleum Engineers , 1982, p. 261-269Conference paper (Refereed)
  • 1622.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Alm, B.
    Luleå tekniska universitet.
    Stephansson, Ove
    Luleå tekniska universitet.
    Experimental deformation of rocks from the Kiruna District, northern Sweden1988In: Proceedings of the seventh quadrennial IAGOD symposium: held in Luleå, Sweden, August 18-22, 1986 / [ed] Ebbe Zachrisson, Taylor and Francis Group , 1988, p. 75-82Conference paper (Refereed)
  • 1623.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Bäckström, Gunnar
    Luleå tekniska universitet.
    Thermal conductivity of NaF at high pressures1979Report (Other academic)
  • 1624.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Forslund, Josef
    Ljunggren, Christer
    Luleå tekniska universitet.
    Mattila, Ulf
    Luleå tekniska universitet.
    Mortensen, Tove-Heide
    Luleå tekniska universitet.
    Stephansson, Ove
    Luleå tekniska universitet.
    Bergmekaniska standardtester: en beskrivning av tester från Avdelningen för bergmekanik, Tekniska högskolan i Luleå1985Report (Other academic)
  • 1625.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Jaktlund, Lise-Lotte
    Luleå tekniska universitet.
    Shaoquan, Kuo
    Academia Sinica.
    The influence of microcrack density on the elastic and fracture mechanical properties of Stripa granite1985In: Physics of the Earth and Planetary Interiors, ISSN 0031-9201, E-ISSN 1872-7395, Vol. 40, no 3, p. 161-179Article in journal (Refereed)
    Abstract [en]

    Presents results from a great number of mechanical tests on Stripa granite containing various amounts of microcracks. Variations in the microcrack density were obtained by shock-heating the rock at different temperatures in the range 100-600°C for 3 h. The results presented are obtained from sound velocity measurements, uniaxial compression tests, Brazilian tests and three-point bending tests. The density of microcracks in the heated rock is studied by means of optical microscopy, SEM and differential strain analysis

  • 1626.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Norin, Jonas
    Luleå tekniska universitet.
    Olofsson, Thomas
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Experimentella bestämningar av mekaniska egenskaper för hårdmetallpulver: slutrapport över pilotstudie1982Report (Other academic)
  • 1627.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Olofsson, Thomas
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Attempt to make accurate measurements of deformations of compressible soilds at high pressure and different states of stress1982In: High pressure in research and industry: 8th AIRAPT Conference, 19th EHPRG Conference, 17 - 22 August 1981, Institte of Physical Chemistry, University of Uppsala, Sweden ; proceedings / [ed] C.-M. Backman, Uppsala: Fysikalisk-kemiska inst., Univ , 1982, p. 619-622Conference paper (Refereed)
  • 1628.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Röshoff, Kennert
    Luleå tekniska universitet.
    Andersson, Göran
    Identification of thermally induced microcracks in rock materials1983In: Proceedings: Appendix / International Conference on Subsurface Heat Storage in Theory and Practice, Stockholm, June 6-8, 1983, Stockholm: Statens råd för byggnadsforskning , 1983, p. 338-342Conference paper (Refereed)
  • 1629.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Röshoff, Kennert
    Luleå tekniska universitet.
    Stephansson, Ove
    Luleå tekniska universitet.
    Microstructures and mechanical characteristics of the Tannas augen gneiss, Swedish Caledonides1980In: Geologiska föreningens i Stockholm förhandlingar, ISSN 0016-786X, Vol. 102, no 4, p. 319-334Article in journal (Refereed)
    Abstract [en]

    The mechanical behaviour, microstructure and substructure of the classic Tannas augen gneiss of the Swedish Caledonides are presented. Progressive deformation of granodiorite to augen gneiss and mylonite is shown to take place in an isochemical environment with redistribution of megacrysts to surrounding matrix. Experimental deformation of natural rocks from the Tannas Augen Gneiss Nappe has been carried out in the temperature range of 20-600oC and under confining pressure of 100-700MPa. The highest strength found is for the fine-grained mylonite. The augen of the gneiss show brittle behaviour under all test conditions, and temperature has a limited effect on the ultimate strength of the matrix of the augen gneiss. Microstructures have been analysed by means of optical microscopy and transmission electron microscopy. The progressive deformation is brought about by dislocation glide and dislocation creep. Subgrain formation, recrystallization and straining of new grains are observed at all stages of the progressive deformation of the matrix while the augen behavior is brittle

  • 1630.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Stephansson, Ove
    Luleå tekniska universitet.
    Experimental deformation of Augen-gneisses1979In: Mechanisms of deformation and fracture: proceedings of the interdisciplinary conference held at the University of Luleå, Luleå, Sweden, September 20-22, 1978 / [ed] Kenneth E. Easterling, Oxford: Pergamon Press, 1979, p. 173-186Conference paper (Refereed)
  • 1631.
    Alm, Ove
    et al.
    Luleå tekniska universitet.
    Stephansson, Ove
    Luleå tekniska universitet.
    Experimental Deformation of Augen-gneisses1978Report (Other academic)
  • 1632. Alm, Richard
    et al.
    Solin, Joakim
    Hur påverkar virtuella skrivbord systemförvaltning2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Desktop-virtualization is an emerging technology with more and more companies starting to apply this technology. But how is the maintenance work actually being affected by this technology, is it for the better or worse?The result of this study is based upon an interview with a company who is delivering desktop-virtualization as a service and thus takes on all the maintenance work. The gathered material is being compared with the theory that we have concluded. Some of the areas it takes on are, the roles, how both the user-support and the handling of changes is being affected, but also both the capacity and availability.The conclusion of the study is pointing towards that the maintenance work is being reduced at the same time as both the capacity and availability are increasing.

  • 1633.
    Alma, Sandqvist
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Industrilized and sustainable construction.
    Byggbranschen måste också plastbanta: En fallstudie om plaster i dagens byggande och dess hälso- och miljöpåverkan2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Syftet med examensarbetet är att bidra med ökad kunskap om hur plastanvändningen ser ut i dagens  byggande och vad den har för miljö- och hälsomässiga konsekvenser. Målet med studien är även att kunna visa på hur plastanvändningen kan förändras på ett hållbart sätt. Föratt kunna uppnå examensarbetets syfte och mål har tre stycken frågeställningar formulerats.

    • Hur mycket och vilken typ av plast förekommer i en nybyggd villa idag?
    • Vilka miljö- och hälsomässiga konsekvenser medför den plast som används i dagens byggande?
    • Vad finns det för alternativa material, produkter och metoder?

    För att svara på dessa frågor har en grundläggande litteraturstudie gjorts kompletterat men enkvantitativ fallstudie. Fallstudien utgår från en villa som är typisk för hur nybyggda villor byggsidag,  år  2018.  Objektet  som  valts  för  fallstudien  är  en  nyproducerad  enplansvilla  på  170kvadratmeter boyta. Plastprodukter har inventerats i stommaterial, installationer, emballageoch förpackningar.

    Resultatet  av  inventeringen  visar på att  3181 kg plastprodukter inventerats i villan vilket betyder att nästan 19 kilogram plast går åt för varje kvadratmeter boyta. Viktmässigt återfanns85 procent av plasten i stommaterial, 11 procent i installationer och 4 procent till emballageoch förpackningar. Sammanställningen visar även att en övervägande del av plasten utgörs avpolystyren (PS). Därefter är polyvinylklorid (PVC), polyeten (PE) och polypropen (PP) de mestf örekommande plasterna.

    Plasterna har även bedömts ur ett miljö- och hälsoperspektiv. Bedömningen utgår ifrån trekategorier; toxicitet, klimatpåverkan och avfall. Resultatet av miljö- och hälsobedömningenvisar att polyeten (PE) och polypropen (PP) är de mest skonsamma plasterna för miljö ochhälsa,  bortsett  från  biobaserade  plaster.  Den  farligaste  plasten  är  enligt  denna  studiepolyuretan (PUR) tätt följt av polyvinylklorid (PVC), polykarbonat (PC) och polystyren (PS).

    Miljö- och hälsobedömningen av olika plasttyper visar på att det är viktigt att plast inte ses somett material utan en grupp av många olika material med olika egenskaper som är mer ellermindre  problematiska  för  hälsa  och  miljö.  Analysen  visar  även  att  flera  plastprodukter  i byggnadens stomme kan ersättas med alternativa material och på så sätt reducera inte baramängden plast utan även de miljö- och hälsokonsekvenser som plasten medför.

    För installationsplast är det bästa alternativet i dagsläget att byta PVC-plast till bättre plast såsom PE och PP. Detta för att minska påverkan på miljö och hälsa både vid tillverkning ochåtervinning. För emballage- och förpackningsplast gäller det främst att minska engångsanvändningen och öka återanvändningen av förpackningsplasten.

    För vidare studier kan det undersökas med vilka medel kan man hjälpa beslutsfattare inombyggbranschen att välja mer hållbara material, och studera hur stor påverkan den ekonomiskaaspekten har när material ska väljas. Ett annat förslag är att titta på hur plastanvändningenskiljer sig åt för olika typer av byggnader; flerbostadshus, offentliga byggnader, fritidshus.

  • 1634.
    Al-Madhlom, Qais
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Hussain, Hussain M.
    Department of Geology, College of Science, Kufa University.
    Assessment of Groundwater Vulnerability in Northern Babylon Governorate, Iraq2016In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 8, no 12, p. 883-902Article in journal (Refereed)
    Abstract [en]

    Groundwater is one of the main resources from the earth, especially for arid or semiarid

    countries. For this reason, it is very important to keep it unpolluted. Drastic

    Model is one of the widely used models to detect groundwater vulnerability to the

    contaminants that are found on ground surface. In this model, it is assumed that the

    vulnerability of the groundwater is affected by seven hydrological parameters. They

    are: depth from the surface ground to groundwater, net recharge into the aquifer

    from the surface, aquifer media, soil media, area topography, impact of vadose zone

    and aquifer hydraulic conductivity. In this study, the DRASTIC model was applied

    on the northern part of Babylon governorate in Iraq, to predict the vulnerability of

    Groundwater in that area. The results indicate that the vulnerability is very low to

    low grade.

  • 1635.
    Al-Madhlom, Qais
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering. University of Babylon, Coolege of Engineering.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Hussain, Hussain M.
    Department of Geology, College of Science, Kufa University.
    Lindblom, Jenny
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Abdullah, Twana
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Abid Hamza, Basher
    University of Babylon, Coolege of Engineering.
    Knutsson, Sven
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Seepage Velocity of Dibdibba Formation in Karbala, Iraq2017In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 9, no 3, p. 279-290Article in journal (Refereed)
    Abstract [en]

    Iraq highly depends on its surface water resources. Now it is facing water shortage problems. For these reasons, the utilization of groundwater will be increasing with time. Karbala Governorate is located in the central part of Iraq. It covers an area of 5034 km2 and the population exceeds one million. It is characterized by an arid or semiarid environment. Karbala Governorate lack surface water resource and consequently, groundwater is the only available resource. The main groundwater aquifer within the area is Dibdibba formation. It is composed of poorly sorted sand and sand stone with gravel. In this research hydrological and hydrogeological information were used to find out the magnitude and the direction of groundwater seepage velocity. The results indicate that groundwater flow toward the flood plain to the east of the study region. The seepage velocity ranges from 0 to 0.18 m/d, with a general increase when moving from the west to the east.

  • 1636.
    Al-Maliki, Laheab A. Jasem
    et al.
    Department of Hydraulic Engineering Structu res, Faculty of Water Resources Engine ering, Green University of Al Qasim, Baghdad.
    Al-Mamoori, Suhaib Kareem
    Department of Environmental Planning, Faculty of Physical Planning, University of Kufa, Najaf.
    El-Tawel, Khaled
    Lebanese University, Faculty of Engineering, Beirut.
    Hussain, Hussain M.
    Remote Sensing Center, University of Kufa, Najaf.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Al Ali, Mohammed Jawad
    Department of Environmental Planning, Faculty of Physical Planning, University of Kufa, Najaf.
    Bearing Capacity Map for An-Najaf and Kufa Cities Using GIS2018In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 10, no 5, p. 262-269Article in journal (Refereed)
    Abstract [en]

    An-Najaf province is situated in south-western part of Iraq. It is 70 meters above the sea level in the dry desert environment. The city is considered as one of the most important cities in Iraq, facing a fast population growth and continuous development in constructions such as residential complexes, hotels, bridges and shopping malls. Soil investigation data for An-Najaf Province (An-Najaf and Kufa cities) from 464 boreholes drilled by the National Centre for Construction Laboratories & Researches (NCCLR)/Babylon laboratory were used in this research. The data were analysed and possessed using Excel program then represented on the Geographical Information System (GIS) program by Inverse Distance Weighted (IDW) tool to create an allowable bearing capacity map for the soil at depths 0 - 2 meters. The allowable bearing capacity is one of the most important soil characteristics to be considered when making a database for An-Najaf city soil. Geographical Information System GIS program enables to create reliable database for any characteristic and it is one of the best programs to produce an accurate map and allow ease in dealing with it. Those maps cover all the studied areas and by using contour lines, approximate values for no-data areas can be obtained. The results show that the allowable bearing capacity range is 5 - 20 Ton/m2 for both An-Najaf and Kufa cities. Kufa city has the range 5 - 9 Ton/m2. An-Najaf city has the range 7 - 18 at the center, 8 - 10 Ton/m2 at the north eastern part, 7 - 14 Ton/m2 for the north western part, 6 - 12 Ton/m2 at the south eastern and 12 - 19 Ton/m2 at the south western.

  • 1637.
    Al-Mamoori, Sohaib Kareem
    et al.
    Department of Environmental Planning, Faculty of Physical PlanningUniversity of KufaNajafIraq.
    Al-Maliki, Laheab A. Jasem
    Department of Hydraulic Engineering Structures, Faculty of Water Resources EngineeringGreen University of Al QasimBaghdadIraq.
    El-Tawel, Khaled
    Faculty of EngineeringLebanese UniversityBeirutLebanon.
    Hussain, Hussain M.
    Al-Ansari, Nadhir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Al Ali, Mohammed Jawad
    Department of Environmental Planning, Faculty of Physical PlanningUniversity of KufaNajafIraq.
    Chloride, Calcium Carbonate and Total Soluble Salts Contents Distribution for An-Najaf and Al-Kufa Cities’ Soil by Using GIS2018In: Geotechnical and Geological Engineering, ISSN 0960-3182, E-ISSN 1573-1529Article in journal (Refereed)
    Abstract [en]

    The main objective of the paper is to create geotechnical maps for three soil chemical properties in An-Najaf and Kufa cities’ soil by utilizing of GIS tools. This properties are the chloride concentration, calcium carbonate (CaCO 3) and total soluble salts where they affect the durability of reinforced structural elements. This paper provides an easy accurate way to represent soil properties levels for different depths of soil and create reliable database that will help engineers and decision makers. The data included in this paper were collected for (464) boreholes with depths up to 35 m distributed on residential areas in all of An-Najaf and Kufa cities. Arc-Map of GIS 10.2.1 was used to produce the maps. It has been concluded that chloride content in the soil of the study area range from - 0.01 to 0.99% and with an average of 0.5. The maximum value found in at depth 4–6 m while the minimum value found in location at depth 4–6, 8–10 and 14–16 m. The chloride content in most of An-Najaf province has exceeded the permissible limit and for all, this required taking percussions to protect foundations. While calcium carbonate content in the soil of the study area range from 53 to 0.18 and with an average of 26.6. The maximum and the minimum values found at depth 4–6 m. Calcium carbonate content is within the permissible limits in most locations except in some locations.

  • 1638. Alman, Jenny
    Rätten till skolskjuts: På en väg av juridiska kringelkrokar2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 1639. Al-Maqdasi, Zainab
    Development of Carbon Fibre Fabric with Enhanced Drapeability by Using Micro Local Point Cutting (µLPC)2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A method to improve the drapeability of Spread Tow Fabric (STF) of carbon fibres by introducing cuts to the fabric at the tow level is investigated. Two cutting patterns, different distances between the cuts and two cut sizes were trialled. The drapeability was assessed by means of optical scanning system (ATOS scanner) and a specially developed compliance test. The mechanical performance of the plates manufactured with the cut material was evaluated through a tensile test by measuring the stiffness and the strength in tension. The parameters that affect the drapeability and the mechanical performance were also studied. It was found that it is possible to tailor enhanced drapeability with a trade-off of the mechanical properties which might be acceptable for some applications. The reduction in mechanical properties varied with respect to the cutting pattern and to the distances between the cuts within the same pattern (the resultant fibre length).

  • 1640.
    Al-Maqdasi, Zainab
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Gong, Guan
    Swerea SICOMP AB, Piteå.
    Nyström, Birgitha
    Swerea SICOMP AB, Piteå.
    Joffe, Roberts
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Wood Fiber Composites With Added Multi-Functionality2018Conference paper (Refereed)
    Abstract [en]

    Graphene nanoplatelets (GNPs) are used to enhance the mechanical properties and functionality of wood plastic composite (WPC) targeting applications such as de-icing or anti-icing and fast thermal diffusivity. The GNPs are integrated into neat polymer using a masterbatch containing functionalized graphene by melt compounding through a twin-screw extruder without the use of any coupling agent or compatibilizer. The same manufacturing process (melt compounding) but with the use of compatibilizer is employed to produce WPC with nano-doped matrix. The effect of different GNP loadings (up to 15 wt.%) on morphology, crystallinity, mechanical and thermal conductivity of the nanocomposites and the WPCs was investigated. It was found that both strength and modulus of nanocomposites, in tension and bending, were increased with the addition of GNPs. With the aid of MAPE compatibilizer WPCs show higher flexural strength and modulus than neat polymer. GNP has marginal effect on the flexural stress but further increases flexural modulus of WPC. The preliminary results related to the thermal conductivity of studied materials indicate that the incorporation of GNP may be beneficial for faster and more uniform heat distribution in WPC.

  • 1641.
    Al-Mashikhi, S.O.
    et al.
    University of Notttingham.
    Powell, John
    Kaplan, Alexander
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
    Voisey, K.T.
    University of Notttingham.
    An explanation of ‘striation free' cutting of mild steel by fibre laser2009In: Lasers in manufacturing 2009: proceedings of the Fifth International WLT-Conference Lasers in Manufacturing, LIM 2009 : Munich, Germany, June 15th - 18th, 2009 / [ed] Andreas Ostendorf, Stuttgart: AT-Fachverlag , 2009Conference paper (Refereed)
    Abstract [en]

    This paper presents the results of an experimental and theoretical investigation into the phenomenon of ‘striation free cutting', which is a feature of fibre laser cutting of thin section mild steel. The paper concludes that the creation of very low roughness edges is related to an optimisation of the cut front geometry when the cut front is inclined at angles close to the Brewster angle for the laser - material combination. For purely geometric reasons this particular type of cut front optimisation is not possible for CO2 laser cutting of mild steel.

  • 1642.
    Al-Mashikhi, S.O
    et al.
    Salalah College of Technology, Engineering Department, Salalah, Oman and Faculty of Engineering, University of Nottingham.
    Powell, John
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Kaplan, Alexander
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
    Voisey, K.T.
    Faculty of Engineering, University of Nottingham.
    Heat affected zones and oxidation marks in fiber laser–oxygen cutting of mild steel2011In: Journal of laser applications, ISSN 1042-346X, E-ISSN 1938-1387, Vol. 23, no 4Article in journal (Refereed)
    Abstract [en]

    The effect of cutting speed and sheet thickness on surface oxidation and heat affected zones (HAZs) has been investigated for laser–oxygen cutting of mild steel sheet with a fiber laser. Optical and scanning electron micrographs were used to determine the extent of surface oxidation and HAZ from plan and cross-sectional views, respectively. The HAZ is consistently wider at the bottom of the cut compared to the HAZ at the top of the cut. With increasing speed, the width of the HAZ at the top of the cut decreases whereas the HAZ width at the bottom of the cut generally increases. No simple, direct relationship between HAZ width and surface oxidation was seen. However, it is possible to state that in each case considered here, the HAZ would be completely removed if they are machined back by a depth equal to the extent of the surface oxidation.

  • 1643.
    Almblad, Cecilia
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Industrilized and sustainable construction.
    Stommaterialets klimatpåverkan: En jämförande studie mellan stommaterialen trä och betong ur ett livscykelperspektiv applicerat på en passivhusförskola2017Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 1644. Almbo, Tomas
    Konstruktion av drivsystem för manuella rullstolar2005Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 1645. Almcrantz, Linn
    MKB i praktiken: utfyllnad av bergrum med aska2007Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 1646.
    Almefelt, Lars
    et al.
    Chalmers University of Technology.
    Brännström, Oskar
    The network as an asset: reflections on an industrial case2004Report (Other academic)
  • 1647. Almeida Cypriano, Lucas
    Study and Design of an Adaptive Control Law for Spacecraft Attitude Control2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this thesis the problem of spacecraft attitude control is investigated. The spacecraft dynamics are modeled as a rigid body system controlled by 4 thrusters, and the kinematics are represented by direction cosine matrix. In this thesis, the effectiveness of retrospective cost adaptive control for spacecraft attitude control is evaluated. The prominent feature of this adaptive controller is that it requires little knowledge of the system to be controlled. This makes this controller attractive since for most spacecraft knowledge of the spacecraft’s inertia tensor is limited and will sometimes change over the spacecraft lifetime.

  • 1648.
    Almeida, Nuno A.F.
    et al.
    Mechanical Engineering Department & TEMA, University of Aveiro, Campus Universitário de Santiago.
    Rodrigues, Joana
    Physics Department & I3N, University of Aveiro, Campus Universitário de Santiago.
    Silva, Patricia
    Mechanical Engineering Department & TEMA, University of Aveiro, Campus Universitário de Santiago.
    Emami, Nazanin
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
    Soares, Manuel J.
    Physics Department & I3N, University of Aveiro, Campus Universitário de Santiago.
    Monteiro, Teresa
    Physics Department & I3N, University of Aveiro, Campus Universitário de Santiago.
    Lopes-da-Silva, José A.
    Chemistry Department & QOPNA, University of Aveiro, Campus Universitário de Santiago.
    Marques, Paula A.A.P.
    Mechanical Engineering Department & TEMA, University of Aveiro, Campus Universitário de Santiago.
    Pressure dependent luminescence in titanium dioxide particles modified with europium ions2016In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 234, p. 137-144Article in journal (Refereed)
    Abstract [en]

    Particles of titanium dioxide were prepared in the presence of europium ions (TiO2:Eu) by a solvothermal method and thermal annealed in air at 500 °C. The spectroscopic properties of TiO2:Eu particles were analyzed indicating that the Eu3+ ions are likely distributed at the surface or near the surface of the titanium dioxide particles. The photoluminescence analysis showed that the intraionic emission was strongly sensitive to reduced pressure conditions, as seen by its absence under vacuum conditions. The ion emission was re-established as soon as the atmosphere was restored. Additionally, the ion integrated emission intensity follows a linearly dependence with pressure in the range of 150 to 800 mbar revealing a high sensitivity to small variations in pressure, which is an unprecedented result. This innovation will allow the study of new technologies in the area of low vacuum sensors where TiO2:Eu may act as the active element of an optical sensor for a pressure device.

  • 1649.
    Almer, J.
    et al.
    Advanced Photon Source (APS), Argonne National Laboratory, Argonne.
    Lienert, U.
    Advanced Photon Source (APS), Argonne National Laboratory, Argonne.
    Peng, R.L.
    Linköping universitet.
    Schlauer, C.
    Linköping universitet.
    Odén, Magnus
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Strain and texture analysis of coatings using high-energy x-rays2003In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 94, no 1, p. 697-702Article in journal (Refereed)
    Abstract [en]

    We investigate the internal strain and crystallographic orientation (texture) in physical-vapor deposited metal nitride coatings of TiN and CrN. A high-energy diffraction technique is presented that uses synchrotron x rays and an area detector, and which allows the strain and intensity distributions of multiple crystallographic planes to be measured by a single x-ray exposure. Unique texture states and nonlinear sin2 strain distributions are observed for all coatings investigated. Quantitative analysis indicates that existing micromechanical models can reasonably predict strain and corresponding stress for mixed-hkl reflections but are inadequate for fully describing measured data. Alternative mechanisms involving deposition-induced defects are proposed

  • 1650.
    Almer, J
    et al.
    Advanced Photon Source (APS), Argonne National Laboratory, Argonne.
    Odén, Magnus
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Håkansson, G
    Bodycote Värmebehandling AB.
    Microstructure and thermal stability of arc-evaporated Cr-C-N coatings2004In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 84, no 7, p. 611-630Article in journal (Refereed)
    Abstract [en]

    The role of C incorporation in the microstructure and thermal stability of arc-evaporated Cr-C-N coatings is explored via reactive growth in a mixed C2H4-N2 environment. C is found to react more readily than N at both the Cr cathode and the coating surfaces, so that a C2H4-to-N2 flow ratio of only 1% yields a C-to-N ratio of approximately 10% within the coatings. The as-deposited microstructures consist primarily of the δ-Cr(C, N) phase and possess high compressive residual stresses, which decrease with increasing C content. Post-deposition annealing up to 700°C results in depletion of lattice defects, and concomitant reductions in stress and coating hardness, together with phase transformations which suggest metastable phase formation during growth. Apparent activation energies for this lattice defect are found to be in the range expected for bulk diffusion of N and C (2.4-2.8 eV). The results suggest that inclusion of small amounts of C in this system offers the ability to reduce internal stresses while maintaining defect-related hardness increases, permitting growth of thicker and thus more wear-resistant coatings.

30313233343536 1601 - 1650 of 62973
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