oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2017 ( 2 )

2015 ( 24 )

2014 ( 46 )

2013 ( 56 )

Custom range...

Search Results: 1 - 10 of 571 matches for " Helge "
All listed articles are free for downloading (OA Articles)
Page 1 /571
Display every page Item
Simplified Approximate Expressions for the Boundary Layer Flow in Cylindrical Sections in Plankton Nets and Trawls  [PDF]
Svein Helge Gj?sund
Open Journal of Marine Science (OJMS) , 2012, DOI: 10.4236/ojms.2012.22009
Abstract: Trawls and plankton nets are basically made up of conical and cylindrical net sections. In conical sections the flow will pass through the inclined net wall with a noticeable angle of attack, and then the flow, filtration and drag can be suitably modelled e.g. by a pressure drop approach [1]. In cylindrical and other non-tapered net sections, such as foreparts and extension pieces in trawls and plankton nets, the flow is directed along the net wall and is best considered in terms of a boundary layer. Boundary layer theory and turbulence models can be used to describe such flow, but this requires extensive numerical modelling and computational effort. Simplified approximate formulas providing a qualitative description of the flow with some quantitative accuracy are therefore also useful. This work presents simplified parametric expressions for boundary layer flow in cylindrical net sections, including the boundary layer thickness and growth rate along the net, the filtration velocity out of the net wall, the decrease in mass flux through the net due to the growing boundary layer, and the effect of twine thickness, flow (towing) velocity and the dimensions of the net. These expressions may be useful for assessing the existence and extension of a boundary layer, for appropriate scaling of boundary layer effects in model tests, for proper placement of velocity measurement probes, for assessing the influence on filtration and clogging of plankton net sections, and more.
The Quality Management of Norwegian Universities and its Influence on University Libraries
Helge Salvesen
Liber Quarterly : The Journal of European Research Libraries , 2002,
Abstract: In recent years many universities in the western world have been going through different crises, most notably of a financial nature. To date the reaction has been to set up evaluation schemes, to reorganise, to create strategic plans for teaching, research and promotion policy, whilst retaining the classic values of the university. What has not been clearly grasped is that the crisis is very largely one of relevance.
The Quality Assurance System for Higher Education in Norway - with Particular Reference to the Library Services
Helge Salvesen
Liber Quarterly : The Journal of European Research Libraries , 2006,
Abstract: Since the Pan-European Bologna Declaration of 1999, which introduced a qualitative improving programme for higher education in Europe, governments in many countries have initiated significant university reforms. In Norway the reforms were introduced fully in the academic year 2003-2004. This paper identifies the reforms and tries to relate them to the ideologies of new public management, globalization and efficiency.
The University Library in Troms as a Learning Centre
Helge Salvesen
Liber Quarterly : The Journal of European Research Libraries , 2000,
Abstract: The University Library in Troms is the library of the most northerly university in the world. We have a special responsibility when it comes to taking care of and making available those documents and traditions that pertain to the northern parts of the world. It is also our goal to document and make available to a wider public the University’s own research activities. We want too to stand out as the central learning centre in the University both for students and researchers at all levels.
Klaus Bruhn Jensen: Medier og samfund
Helge ?stbye
MedieKultur : Journal of Media and Communication Research , 2008,
Abstract:
TRYLLELYGTEN - Levende papirer om levende billeder
Helge Krarup
MedieKultur : Journal of Media and Communication Research , 1988,
Abstract:
Norsk arbeidsmedisinsk epidemiologi: Hvor st r vi? Hvor g r vi?
Helge Kjuus
Norsk Epidemiologi , 2009,
Abstract: SAMMENDRAG Arbeidslivet frembyr populasjoner med gunstige eksponeringskontraster, som kan v re et attraktivt utgangspunkt for rsakss kende epidemiologi. Denne artikkel gir eksempler p innholdsmessig og metodemessig praksis innenfor det arbeidsmedisinske epidemiologiske fagomr det i Norge de siste decennier, og peker p en del utfordringer for fremtidig virksomhet innenfor den arbeidsmedisinske epidemiologien. kende gradienter i livsstil og helse, kompliserte rsaksnettverk, multikomponent, lavgradig eksponering og bruk av nye effektmark rer vil v re noen av fremtidens utfordringer. Kjuus H. Occupational epidemiology in Norway. Status and future challenges. Nor J Epidemiol ENGLISH SUMMARY The traditional exposure contrasts found in working populations represent an attractive starting point for epidemiological studies. This paper gives examples of past and current practice in the field of occupational epidemiology in Norway, and discuss some challenges for future epidemiologic studies. Increasing gradients in lifestyle and health, complicated causal webs, low exposure to a multitude of factors, and use of new biomarkers for effect represent some of these challenges.1999; 9
Increasing life expectancy and the growing elderly population
Helge Brunborg
Norsk Epidemiologi , 2012,
Abstract: The life expectancy has increased rapidly in Norway in recent decades, with about year per year. The increase has been particularly fast for men, following a temporary decline in the 1950s and 1960s. Statistics Norway’s mortality projections using the Lee-Carter method indicate further improvements in this century – about 10 years higher life expectancy at birth. This implies significant mortality declines for older persons as the mortality is now small for young people. With no deaths below age 50 the life expectancy would be only 1-2 years higher. Population projections are for several reasons important for studying population ageing, including to have knowledge about the future age structure, and to estimate the effects of possible policy changes. In addition, the mortality projections are used for several other purposes than for projecting the population, such as calculating future pensions according to the new pension system, where life expectancy improvements reduce the annual pensions. The population projections show that the population will age regardless of plausible assumptions made about the demographic components births, deaths, immigration and emigration. Policies to affect these components may only marginally affect future ageing, and in some cases in the wrong direction. The only factor that may significantly affect the future ratio of the working to the non-working population, the potential support ratio, is that people work longer. This ratio will remain at the current level if the pension age is increased from the current 67 years to 78 years at the end of the century. This may be possible if the health of old persons continues to improve.
Tel en Nordlands Trompet. Nils Magne Knutsen 60 r
Helge Stangnes
Nordlit : Tidsskrift i litteratur og kultur , 2003,
Abstract:
Blant spioner og diktere - opplysning og konspirasjon i Tyskland p 1700-tallet
Helge Jordheim
Nordlit : Tidsskrift i litteratur og kultur , 2002,
Abstract:
Page 1 /571
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.