Fakultet for ingeniørvitenskap (uspesifisert): Nye registreringer
Viser treff 81-100 av 126
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A new dynamic void Growth Model
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:118, Doctoral thesis, 2004)This work develops a new void growth model which is capable of describing the deformation and fracture of ductile materials under dynamic loading conditions. A representative volume element (RVE) which consists of a ... -
Improving Environmental Performance of Industrial Products through Product Service Systems
(Dr. ingeniøravhandling, 0809-103X; 2001:45, Doctoral thesis, 2001)This dissertation deals with the unintended sideeffects of utilizing resources and causing environmental load. The intention of this report is to contribute to a leap improvement in enviornmental performance of industrial ... -
Deposit Formation on Cylinder Liner Surface in medium-speed Engines
(Dr. ingeniøravhandling, 0809-103X; 2003:87, Doctoral thesis, 2003)The presence of deposits in the honing grooves in diesel engine cylinder liners can cause a severe increase in the consumption of lubricating oil. These deposits may appear amber in which case they may be referred to as ... -
An Experimental Investigation of Velocity Distribution and Head Loss of Oscillatory Flow in a Rectangular Duct with Sand Roughness
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:4, Doctoral thesis, 2004)Frequency and amplitude dependency of velocity distribution and head loss of oscillatory flow in a rectangular duct have been studied experimentally with a model tunnel system. Tests were carried out with the duct of both ... -
Equilibrium and Non-Equilibrium Thermodynamics of Natural Gas Processing
(Dr. ingeniøravhandling, 0809-103X; 2002:146, Doctoral thesis, 2002)The objective of this work has been to study equilibrium and non equilibrium situations during high pressure gas processing operations with emphasis on utilization of the high reservoir pressure. The well stream pressures ... -
Eco-efficiency of waste management: A case study of the Norwegian deposit and recycling system for PET bottles
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:202, Doctoral thesis, 2005)The Norwegian system for depositing and recycling of PET bottles (Resirk/PET system)started in May 2000, and is based on Norsk Resirk's mission of improving cost- and environmental efficiency of this system. Has this been ... -
Simulations of Turbulent Flow between a Rotating and a Stationary Disk
(Dr. ingeniøravhandling; 2001:12, Doctoral thesis, 2001)The main focus of this thesis is turbulent flow between a rotating and a stationary disk. The extension of the disks is assumed to be large enough to prevent the outer boundary conditions to influence the flow of the region ... -
Integrated Control of Marine Electrical Power Systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:37, Doctoral thesis, 2008)This doctoral thesis presents new ideas and research results on control of marine electric power system. The main motivation for this work is the development of a control system, power management system (PMS) capable to ... -
Dynamics of the Seasonal Snowcover in the Arctic
(Dr.ingeniøravhandling, 0809-103X; 2002:29, Doctoral thesis, 2002)Arctic snow cover is important to life on Earth from the microscale soil microarthropod population, to reindeer at the local scale and even the global scale through its impact on the global climate. There ... -
Analysis of the two-fluid model and the drift-flux model for numerical calculation of two-phase flow
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:219, Doctoral thesis, 2006)Flerfasestrømning er av betydning i en lang rekke anvendelser, blant annet i olje- og gassindustrien, i den kjemiske og i prosessindustrien, inkludert i varmepumpende systemer, samt i sikkerhetsanalyse av kjernekraftverk. ... -
On the shear capacity of steel plate girders with large web openings
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:9, Doctoral thesis, 2004)This report presents an investigation of the shear capacities of steel plate girders with web holes, penetrations, cut-outs or openings. The study is motivated by the need for simple guidelines that can be used in practical ... -
Flow vaporization of CO2 in Microchannel Tubes
(KKT-rapport, 1503-0342; 2002:1, Doctoral thesis, 2002) -
Real-time reconfigurable devices implemented in UV-light programmable floating-gate CMOS
(Dr. ingeniøravhandling, 0809-103X; 2002:52, Doctoral thesis, 2002)This dissertation describes using theory, computer simulations and laboratory measurements a new class of real time reconfigurable UV-programmable floating-gate circuits operating with current levels typically in the pA ... -
Faces of a Sadhu. Encounters with Hindu Renouncers in Northern India
(Doctoral thesis, 2002)What is it about India and Varanasi, this holy city on the bank of the Ganga that has made me return, again and again? It is definitely not the freezing cold temperatures during mid-winter, nor is it the dry heat at spring, ... -
Hydrogen gas explosions in pipelines - modeling and experimental investigations
(Doktoravhandlinger ved NTNU, 1503-8181; 2007::14, Doctoral thesis, 2007)Gas explosions in closed pipes with a single obstacle have been investigated both numerically and experimentally. Most of the work is related to hydrogen and air mixtures, but other fuels have also been used. At the present ... -
Norwegian natural gas transportation systems: Operations in a liberalized European gas market
(Dr. ingeniøravhandling, 0809-103X; 2001:34, Doctoral thesis, 2001)The main hypothesis tested in this work is: “It is possible to operate future Norwegian natural gas transportation systems at a level that is approximately optimal, technically and economically, with major stakeholders ... -
Analysing Complex Oil Well Problems through Case-Based Reasoning
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:225, Doctoral thesis, 2007)The history of oil well engineering applications has revealed that the frequent operational problems are still common in oil well practice. Well blowouts, stuck pipes, well leakages are examples of the repeated problems ... -
Geological, geomorphological and geophysical investigations of areas prone to clay slides: Examples from Buvika, Mid Norw
(Doktoravhandlinger ved NTNU, 1503-8181; 2007-156, Doctoral thesis, 2007)Large areas prone to clay slides are present in Canada, Sweden and Norway. Traditionally, mainly geotechnical approaches have been used to solve clay-slide issues. However, there is great potential to utilise interdisciplinary ... -
A probabilistic approach to the value chain of underground iron ore mining: From deposit to product
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:65, Doctoral thesis, 2005)Mining activities will eventually deplete any deposit. In a sustainability perspective, the deposit should therefore be utilised optimally during production. A prerequisite to achieve this is the deliberate and consistent ... -
Experimental investigation of wave induced vibrations and their effect on the fatigue loading of ships
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:133, Doctoral thesis, 2007)This thesis represents an attempt to reveal and explain the mysterious excitation sources which cause global wave induced vibrations of ships. The wave induced vibrations of the hull girder are referred to as springing ...