The Helmholtz resonator is a prototype of a single acoustic resonance, which can be modeled with a digital resonator. This paper extends this concept by coupling several Helmholtz resonators. The resulting structure is called a Helmholtz resonator tree. The height of the tree is defined by the number of resonator layers that are interconnected. The overall number of resonance frequencies of a H...

All-surface induction heating systems, typically comprising small-area coils, face a major challenge in detecting the presence of a metallic vessel and identifying its partial surface coverage over the coils to determine which of the coils to power up. The difficulty arises due to the fact that the user can heat vessels made of a wide variety of metals (and their alloys). To address this proble...

Title: Care for MRSA carriers in the outpatient sector: A survey among MRSA carriers and physicians in two regions in Germany Authors: Heike Raupach-Rosin ([email protected]) Nicole Rübsamen ([email protected]) Sebastian Szkopek ([email protected]) Oliver Schmalz ([email protected]) André Karch ([email protected]) Rafael Mikolajczyk (rafael.mikol...

finite and boundary element methods have been used by many authors to solve mathematicalphysics problems. however, the coupling of these two methods happens to be more efficient as it combinestheir merits. in this paper, the mathematical analysis of the coupling of finite and boundary element methodsfor the helmholtz equation is presented.

Introduction Osteoporosis is a disease involving loss of trabecular bone, and it has been shown that the quality of the trabecular network is an important determinant of a bone’s strength and resistance to fracture (1). Micro-MRI at intermediate field strengths (1.5 and 3 T) has been used to obtain three-dimensional images of trabeculae in bones of the appendicular skeleton such as in the dista...

The number of CubeSats launched to space has largely increased during last years. Any kind satellite, even CubeSats, need have some control on their attitude for pointing, i.e. antenna Earth or solar panels Sun. Among the available technology attitude, usually cylindrical coils called magnetorquers, whose magnetic field interacts with Earth’s field. CubeSat To verify its performance, it can be ...

Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of  non-homogeneity in RF receive and transmit. This can be the most effective source of error in  quantitative  studies  in  MRI  imaging.  Part  of  this  non-homogeneity  demonstrates  the  characteristics of RF coil and part of it is due to the interaction of RF field with the material being  imaged...

Iana Markevych ([email protected]) Elisabeth Thiering ([email protected]) Elaine Fuertes ([email protected]) Dorothea Sugiri ([email protected]) Dietrich Berdel ([email protected]) Sibylle Koletzko ([email protected]) Andrea von Berg ([email protected]) Carl-Peter Bauer (cpbauer@t-online...

Nina Wawro ([email protected]) Joachim Heinrich ([email protected]) Elisabeth Thiering ([email protected]) Jürgen Kratzsch ([email protected]) Beate Schaaf ([email protected]) Barbara Hoffmann ([email protected]) Irina Lehmann ([email protected]) Carl-Peter Bauer ([email protected]) Sibylle K...

a numerical study of 3d electrokinetic flows through micromixers was performed. the micromixers considered here consisted of heterogeneous rectangular microchannels with prescribed patterns of zeta-potential at their walls. numerical simulation of electroosmotic flows within heterogeneous channels requires solution of the navier-stokes, ernest-plank and species concentration equations. it is kn...