Sökning: "shift luleå"

Visar resultat 1 - 5 av 84 avhandlingar innehållade orden shift luleå.

  1. 1. Cost-effective maintenance of railway track geometry : a shift from safety limits to maintenance limits

    Författare :Iman Arasteh Khouy; Peter Veit; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

    Sammanfattning : Railway infrastructure is a complex system which comprises different subsystems. Long life span is one of the important aspects of this prime mode of transport. However, the useful life of its assets is highly dependent on the maintenance and renewal strategy used during the assets’ life cycle. LÄS MER

  3. 2. Immigration, security and the public debate on US language policy : A critical discourse analysis of language attitudes in the United States of America

    Författare :Soraya Tharani; Anna-Brita Stenström; Luleå tekniska universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; national identity; societal security; language policy; ethnolinguistic conflict; human rights; language rights; ethnicity; multilingualism; immigration; critical discourse analysis; language attitudes; English language; Spanish language; United States;

    Sammanfattning : The narrative of the United States is of a "nation of immigrants" in which the language shift patterns of earlier ethnolinguistic groups have tended towards linguistic assimilation through English. In recent years, however, changes in the demographic landscape and language maintenance by non-English speaking immigrants, particularly Hispanics, have been perceived as threats and have led to calls for an official English language policy. LÄS MER

  4. 3. System identification in alternative shift operators with applications and some other topics

    Författare :Britta Fischer; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

    Sammanfattning : This thesis mainly concentrates on two issues of system identification, namely identification for controller design and identification with orthonormal basis functions. In identification for controller design one seeks to obtain sufficient knowledge about the plant to design a high-performance controller. LÄS MER

  5. 4. Shoulder-neck exposure from assembly work and the significance of rationalization

    Författare :Shihan Bao; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Work Environment; Industriell produktionsmiljö;

    Sammanfattning : The main purpose of this thesis was to investigate the implications of different rationalization levels of assembly work on shoulder-neck exposure. Three levels were studied: (1) a Chinese Tayloristic system, (2) a Swedish Tayloristic system, and (3) an assembly workplace rationalization in Sweden according to 'modern' rationalization principles including ergonomic purposes. LÄS MER

  7. 5. Scattering of electromagnetic waves by a perfectly conducting half plane below a stratified overburden and applications to geophysical prospecting by VLF

    Författare :Olle Olsson; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : The present paper is an introduction to and a summary of a thesis consisting of the following papers:1. Scattering of electromagnetic waves by a perfectly conducting half plane below a stratified overburden. Radio Sci. (1978), Vol. LÄS MER