Sökresultat

New fusionless devices are being developed to get over the limits of actual spinal surgical treatment, based on arthrodesis. However, due to their recentness, no standards exist to test and validate those devices, especially concerning the wear. A new tribological first approach to the definition of an in vitro wear protocol to study wear of flexible and sliding spinal devices is presented in this

Detta är en ny textkritisk utgåva av en unik version av hjältedikten Théséus de Cologne som ingår som en del av en krönika om hertigarna från Savojen. Det ingår också en tolkning av verkets tillblivelse och betydelse i den historiska och intertextuella kontext som författaren befann sig i under skrivandet.

The porcine model is frequently used during development and validation of new spinal devices, because of its likeness to the human spine. These spinal devices are frequently composed of pedicle screws with a reputation for stable fixation but which can suffer pullouts during preclinical implantation on young animals, leading to high morbidity. With a view to identifying the best choices to optimiz

Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical mode

PURPOSE: We evaluated the biomechanical strength of two all suture anchors (ASA) of reduced diameter (1.4 mm) and compared them with the standard screw anchor (SA) with larger diameter (5.5 mm) used in rotator cuff tears. METHODS: We conducted 30 uniaxial vertical pullout tests using Material Testing System Instron 5566A until failure of the anchorage defined as rupture of the threads or anchor or

We have tracked the structural evolution of the monoolein bicontinuous cubic phase under in meso crystallogenesis conditions. Significantly, all measurements have been carried out in situ within a crystallisation plate reproducing the exact conditions during a crystallisation trial. The structure of the MO cubic phase, doped with a small concentration of amyloid-beta peptide, was measured 1 day, 5

AIMS AND OBJECTIVES: An in-depth exploration of self-efficacy among heart transplant recipients by means of Bandura's self-efficacy theory.BACKGROUND: An essential component of chronic illness management is self-management, which refers to activities carried out by people to create order, structure and control in their lives. Self-efficacy is an important aspect of self-management, which seems to

AbstractAim The aim of this thesis was to evaluate the treatment and follow-up of patients undergoing hypospadias surgery at the Department of Plastic and Reconstructive Surgery, Skåne University Hospital, Malmö, in an attempt to improve the overall care of these patients. It also aimed to investigate the tissue properties of the urethral plate and deep chordee in hypospadias patients with signifiAbstractAim The aim of this thesis was to evaluate the treatment and follow-up of patients undergoing hypospadias surgery at the Department of Plastic and Reconstructive Surgery, Skåne University Hospital, Malmö, in an attempt to improve the overall care of these patients. It also aimed to investigate the tissue properties of the urethral plate and deep chordee in hypospadias patients with signifi

Innovation is widely recognized as an important variable to create competitive advantage and drive economic growth. Innovation is also a relatively vague concept, but the absence of it results in stagnation and loss of competitive behaviors. Innovation capability is the ability to be innovative, and is a characteristic of individuals as well as organizations. The issue with learning and executing

In saline soils, the severity of drought for the soil microbial community is exacerbated by accumulating concentrations of salts during drying. In this study we investigated how bacterial growth and respiration responses to drying-rewetting were affected by salinity. To do this, we adjusted a non-saline soil to four different salinities (0, 2, 7 and 22 mg NaCl g−1), followed by addition of plant m

Ketene is important intermediate in high-temperature chemistry of several oxygenates, such as acetone, acetic acid, and diacetyl. Ketene reactions appear in the sensitivity spectra of calculated burning velocities of the first two species. To provide independent experimental data for validation of the ketene sub-mechanism, the laminar burning velocities of diacetyl + air flames at 1 atm and initia

Solar energy is considered to be an alternative sustainable energy source in the urban environment. The potential of using solar energy in urban areas is highly dependent on urban morphology which affects the level of solar irradiance received by individual buildings. Many studies focus on solar energy potential of building form in urban areas but relatively few studies examine how urban morpholog

Gasoline partially premixed combustion (PPC) is a potential strategy to achieve high engine efficiency, as well as low NOx and soot emissions. But the in-cylinder combustion process of PPC is not well understood. In this paper, multiple optical diagnostics are applied to investigate the PPC ignition and flame development in a light-duty optical engine under single-injection condition. For the inje

TO-DCF, a new backoff scheme for 802.11, has the potential to significantly increase throughput in dense wireless LANs while also opportunistically favouring nodes with heavier traffic loads and/or better channel conditions. In this paper we present an analytical model to investigate the behaviour and performance of the TO-DCF protocol with regards to operating parameters such as the number of nod

Vertical electrical sounding was used for assessing the suitability of the drill sites in crystalline areas within a water supply project in Nampula Province in Mozambique. Many boreholes have insufficient yield (<600 L/h). Electrical resistivity tomography (ERT) was carried out over seven boreholes with sufficient yield, and five boreholes with insufficient yield, in Rapale District, in an attemp