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Showing result 1 - 5 of 6 swedish dissertations matching the above criteria.

  2. 1. Single crystal sapphire dental implants : experimental and clinical studies

    Author : Bahman Fartash; Karolinska Institutet; Karolinska Institutet; []
    Keywords : edentulous mandible; implantology; sapphire dental implants; overdenture; long-term follow-up; radiography; osseointegration; peri-implant mucosa; corrosion; cell culture; animal experiments; light microscopy; scanning electron microscopy; histometri;

    Abstract : The aim of this project was to evaluate single synthetic sapphire crystals as dental implants, with special reference to correlation of clinical and in vitro/in vivo methods of research. The laboratory studies confirmed chemical stability. READ MORE

  4. 2. Mehanics of Rock Fragmentation Static and Dynamic Laboratory Testing Applied to Aggregate Production

    Author : Bahman Bohloli; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; anisotropy; aggregates; rock failure; saturation; Brazilian test; dynamic tensile strength; Hopkinson pressure bar; fragmentation; rock fines; crushing;

    Abstract : Knowing the strength properties of rocks is essential for calculating the stability of natural slopes, constructions in and on rock, excavations, blasting geometry, crushing, and drilling. When rock and rock masses are subjected to either dynamic or static loads, the tensile strength is determined by tests appropriate to the load type. READ MORE

  5. 3. Hip fracture : risk factors and mortality

    Author : Bahman Y Farahmand; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Epidemiology; case-control study; hip fracture; body size; physical activity; socioeconomic status; marital status; smoking; alcohol; survival;

    Abstract : The objective of this thesis was to identify factors related to risk of hip fracture and mortality after the hip fracture. We used data from a large population-based case-control study in postmenopausal women aged 50-81 years during 1993-1995 who resided in six counties in Sweden. READ MORE

  6. 4. Volume Change Effects during Solidification of Alloys

    Author : Bahman Korojy; Hasse Fredriksson; Brij K. Dhindaw; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Teknisk materialvetenskap;

    Abstract : Volume change during solidification is an important concept in achieving of casting soundness. The solidification shrinkage can cause different defects in the ingot casting as well as the shape casting. The volume change due to phase transformation during solidification is the other concept which has to be studied. READ MORE

  7. 5. Charge carrier traffic at interfaces in nanoeletronic structures

    Author : Bahman Raeissi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; HfO2; oxide traps; High-k; interface states;

    Abstract : This thesis describes investigations in relation to the search for materials with high dielectric constant, k, for future CMOS transistors. The most elementary quantities to be considered are k-value and energy band offsets between the dielectric and the silicon crystal on which it is deposited. READ MORE