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BACKGROUND Functional magnetic resonance imaging (fMRI) using blood-oxygen-level-dependent (BOLD) contrasts is a common method for studying sensory or cognitive brain functions. The aim of the present study was to assess the effect of the intravenous anaesthetic propofol on auditory-induced brain activation using BOLD contrast fMRI. METHODS In eight… (More)
Given a pair of convex conjugate functions f and f * , we investigate the relationship between local Lipschitz continuity of ∇f and local strong convexity properties of f * .
This study suggests a wearable sensor technology to estimate center of mass (CoM) trajectory during a golf swing. Groups of 3, 4, and 18 participants were recruited, respectively, for the purpose of three validation studies. Study 1 examined the accuracy of the system to estimate a 3D body segment angle compared to a camera-based motion analyzer (Vicon®).… (More)
In this paper we mainly consider the class LN of all locally nilpotent groups. Using similar arguments as in [GrS] we first show that there is no universal group in LN λ if λ is a cardinal such that λ = λ ℵ0 ; here we call a group G universal (in LN λ) if any group H ∈ LN λ can be embedded into G where LN λ denotes the class of all locally nilpotent groups… (More)
In this study, the changes in the bone density of human femur model as a result of different loadings were investigated. The model initially consisted of a solid shell representing cortical bone encompassing a cubical network of interconnected rods representing trabecular bone. A computationally efficient program was developed that iteratively changed the… (More)
The objective of the study was to determine the effects of tobacco use on selected markers of health and lung function in professional athletes. A total of 108 male professional athletes participated in the study from ten ball game teams in the same sport league in Qatar (age = 26.4 ± 5.1 yrs, height = 190.6 ± 11.9 cm, and weight = 91.5 ± 16.4 kg). The… (More)
Assuming the continuum hypothesis, we construct a pure subgroup G of the Baer–Specker group Z ℵ0 with the following properties. Every endomorphism of G differs from a scalar multiplication by an endomorphism of finite rank. Yet G has uncountably many homomorphisms to Z.
BACKGROUND In this study, we examine the biomechanical advantage of combining localized vibrations to hamstring muscles involved in a traditional resistance training routine. METHODS Thirty-six male and female participants with at least 2 years of experience in resistance training were recruited from the German Sport University Cologne. The participants… (More)