Search for dissertations about: "hydrostatic pressure"

Showing result 1 - 5 of 53 swedish dissertations containing the words hydrostatic pressure.

2. 1. On the inception of leakage : Effect of hydrostatic pressure on the sealing interface

   Author : De Huang; Andreas Almqvist; Roland Larsson; Xiang Yan; Alessandro Ruggiero; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; static seal; contact mechanics; hydrostatic; critical pressure; leakage; Maskinelement; Machine Elements;

   Abstract : As the move towards sustainability continues,  attention needs to be paid to the development of new machinery with high performance and low environmental impact. It places increasing demands on low/zero-emission sealing with a long lifetime. READ MORE

4. 2. Analysis of ICP pulsatility and CSF dynamics : the pulsatility curve and effects of postural changes, with implications for idiopathic normal pressure hydrocephalus

   Author : Sara Qvarlander; Anders Eklund; Jan Malm; Richard Birgander; Martin U Schuhmann; Umeå universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cerebrospinal fluid; CSF dynamics; Intracranial pressure; Pulse pressure; Normal pressure hydrocephalus; Posture; Predictive tests; Mathematical modelling; Magnetic resonance imaging; Infusion tests;

   Abstract : The volume defined by the rigid cranium is shared by the brain, blood and cerebrospinal fluid (CSF). With every heartbeat the arterial blood volume briefly increases and venous blood and CSF are forced out of the cranium, leading to pulsatility in CSF flow and intracranial pressure (ICP). READ MORE

5. 3. Fluid dynamic principles for analysis of intracranial pressure control : application towards space medicine and hydrocephalus

   Author : Petter Holmlund; Anders Eklund; Sara Qvarlander; Jan Malm; Marek Czosnyka; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intracranial pressure; posture; cerebrospinal fluid; microgravity; venous collapse; internal jugular vein; fluid dynamics; venous pressure; spaceflight-associated neuro-ocular syndrome; hydrocephalus; mathematical modeling; ultrasound; magnetic resonance imaging;

   Abstract : Intracranial pressure (ICP) is an important component of the fluid dynamic environment of the brain and plays a central role with regards to the maintenance of normal cerebral blood flow and neuronal function. However, many regulatory mechanisms controlling the ICP are still poorly understood. READ MORE

6. 4. Form pressure generated by self-compacting concrete : influence of thixotropy and structural behaviour at rest

   Author : Peter Billberg; Johan Silfwerbrand; Kamal Khayat; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; self-compacting concrete; thixotropy; structural build-up; form pressure; rheometer; viscometer; instrumented pressure tube; Building engineering; Byggnadsteknik;

   Abstract : Self-compacting concrete (SCC) offers rational and fast casting process since it merely has to be poured, or pumped, into the formwork without any compaction work needed. But this can be at the cost of high form pressure. However, reported results show that SCC can act thixotropically, i.e. READ MORE

7. 5. On Complex Hydrostatic Transmissions : Design of a Two-Motor Concept using Computer-Aided Development Tools

   Author : Mikael Sannelius; Jan Wikander; Stockholm Kungliga Tekniska Högskolan; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Hydrostatic drives are being used in heavy, low-speed vehicles to an ever-increasing extent. The reason for this is that a number of advantages can be achieved such as stepless gear ratios, simple power distribution and high stiffness. Increased demands have led to an interest for new conceptual designs for hydrostatic transmissions. READ MORE