Oliver Künzel

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Layer encoded video is an elegant way to allow adaptive transmissions in the face of varying network conditions as well as it supports heterogeneity in networks and clients. As a drawback quality degradation can occur, caused by variations in the amount of transmitted layers. Recent work on reducing these variations makes assumptions about the perceived(More)
OBJECTIVES To compare the effects of a proprietary extract of willow bark (Assalix) and a selective inhibitor (rofecoxib) of the enzyme cyclo-oxygenase-2 (COX-2). METHODS An open, randomized, post-marketing study was carried out in an out-patients clinic on two groups of patients aged 18 to 80 yr presenting over a 6-month period with acute exacerbations(More)
We recruited 114 patients (56 with chronic nonspecific low back pain, 37 with osteoarthritic knee and 21 with osteoarthritic hip pain) into a surveillance of the effects of taking Doloteffin at a dose providing 60 mg harpagoside per day for up to 54 weeks. Their symptoms and well-being were monitored at 4-6 week intervals by disease-specific and generic(More)
Besides checking estimates of effectiveness and safety of using the proprietary Harpagophytum extract Doloteffin, this postmarketing surveillance compared various disease-specific* and generic** measures of effect. We enrolled 250 patients suffering from nonspecific low back pain (Back group: n = 104) or osteoarthritic pain in the knee (Knee group: n = 85)(More)
An open, non-randomised, study (postmarketing surveillance) was carried out on three groups of patients aged 18 to 80 presenting over an 18 month period with acute exacerbations of low back pain. The objective was to assess the possible economic impact of including a regular dose of proprietary willow bark extract (Assalix) in the treatment provided. A(More)
OBJECTIVE To complete a year's follow-up on patients from a 6-week double-blind pilot comparison between 44 Doloteffin patients and 44 rofecoxib patients being treated for acute exacerbations of chronic low back pain. METHODS 38 "ex-Doloteffin" (ex-D) and 35 "ex-rofecoxib" (ex-R) received Doloteffin containing 60 mg harpagoside per day for up to 54 weeks.(More)
BACKGROUND Osteoinductive bone substitutes are defined by their ability to induce new bone formation even at heterotopic implantation sites. The present study was designed to analyze the potential osteoinductivity of two different bone substitute materials in caprine muscle tissue. MATERIALS AND METHODS One gram each of either a porous beta-tricalcium(More)
In a retrospective evaluation of patients taking part for 2 months in a postmarketing surveillance study on the effectiveness and safety of Harpagophytum procumbens, associations were found to known explanators of pain, disability and depression. Therefore, treatment non-responders might best be referred to a multimodal pain relief program that deals with(More)
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