5,631 research outputs found
Ultra-Stretchable Interconnects for High-Density Stretchable Electronics
Get PDFThe exciting field of stretchable electronics (SE) promises numerous novel applications, particularly in-body and medical diagnostics devices. However, future advanced SE miniature devices will require high-density, extremely stretchable interconnects with micron-scale footprints, which calls for proven standardized (complementary metal-oxide semiconductor (CMOS)-type) process recipes using bulk integrated circuit (IC) microfabrication tools and fine-pitch photolithography patterning. Here, we address this combined challenge of microfabrication with extreme stretchability for high-density SE devices by introducing CMOS-enabled, free-standing, miniaturized interconnect structures that fully exploit their 3D kinematic freedom through an interplay of buckling, torsion, and bending to maximize stretchability. Integration with standard CMOS-type batch processing is assured by utilizing the Flex-to-Rigid (F2R) post-processing technology to make the back-end-of-line interconnect structures free-standing, thus enabling the routine microfabrication of highly-stretchable interconnects. The performance and reproducibility of these free-standing structures is promising: an elastic stretch beyond 2000% and ultimate (plastic) stretch beyond 3000%, with <0.3% resistance change, and >10 million cycles at 1000% stretch with <1% resistance change. This generic technology provides a new route to exciting highly-stretchable miniature devices
Investigating head-neck stabilization using combined mechanical and galvanic vestibular stimuli
No full textThe goal of this study was to assess if the superposition principle is valid in head-neck stabilization during combined torso perturbations and continuous galvanic vestibular stimulation. Nine seated subjects were perturbed in lateral direction on a motion platform while GVS was simultaneously applied. Both the mechanical and galvanic input signals consisted of multisine signals and were designed to be mathematically uncorrelated. For the motion perturbations, two direction and two amplitude variations were included. The GVS signal was applied in a bilateral bipolar configuration at 4 mA. During trials subjects had their eyes closed and were asked to perform a natural stabilization task. Displacements of the head, torso and platform were recorded using a motion capture system. System identification techniques were used to identify the relationship between respectively inputs GVS and torso motion and output head motion. Results show that it is feasible to apply low-level torso perturbations together with continuous galvanic stimulation in studying the head-neck system as high coherencies and consistent behavior are found for the transfer functions from mechanical and galvanic inputs to head motion over all subjects. It is concluded that superposition principle does not hold as gain, phase and coherence modulations were found with the addition of GVS.BMEBioMechanical EngineeringMechanical, Maritime and Materials Engineerin
Group living homes for older people with dementia: Concept and effects
Get PDFEefsting, J.A. [Promotor]Pot, A.M. [Promotor]Depla, M.F.I.A. [Copromotor]Lange, J. de [Copromotor
Cementbetonnen plaatbekledingen op oevers en dijken, bundeling van artikelen uit de vakpers 1990-1991
No full textCUR; Proefproject: Open colloidaal beton a/s dijkbekleding; PT civiele techniek, april 1990. Burger, A.M., Eversdijk, P.J. en Hendriksma, A.M.; Open cementbeton toegepast a/s bekleding voor dijken; Zeewering Breskens, proefproject voor colloidaal beton; Land + Water, mei 1990. Burger, A.M., Eversdijk, P.J. en Hendriksma, A.M.; Colloidaal beton weerstaat zware storm en hoge golven; De praktijk van open cementbeton a/s Plaatbekleding; Land + Water, juni 1990. CUR; Cementbetonnen plaatbekledingen op dijken; Proefprojecten CUR; Civiele Techniek, No4, 1990. Vrieze, C.G. de; Betonnen dijken, groen a/s gras; Proeven met colloidaal beton voor begroeide rivierdijken; Land + Water No.6, juni 1991. Eversdijk, P.J. en Fase, A.G.; Breuksteen met colloidaal beton pakt rivierdijken goed in; Proefproject Opijnen in Julianakanaal; Land + Water No. 7/8, augustus 1991. Rijke, W.G. de en Burger, A.M.; Cementbetonnen plaatbekledingen op dijken en oevers; Praktische ontwerpmethode (1); Civiele Techniek, jaargang 46, No.3, 1991. Rijke, W.G. de en Burger, A.M.; Cementbetonnen plaatbekledingen op dijken en oevers theoretisch waterdicht; Praktische ontwerpmethode (2); Civiele Techniek, jaargang 46, No.4, 1991. CUR; oemonstratieproject open colloidaal beton Noordoostpolder; Civiele Techniek, No.3, 1991
IoWoman, March/April 2004, Vol.34, no.2
Get PDFNewsletter for the Iowa Commission on the Status of Wome
IoWoman, March/April 2004, Vol. 34, no. 2
Get PDFNewsletter for the Iowa Commission on the Status of Wome
Gauge Fields and Strings
Get PDFBased on his own work, the author synthesizes the most promising approaches and ideals in field theory today. He presents such subjects as statistical mechanics, quantum field theory and their interrelation, continuous global symmetry, non-Abelian gauge fields, instantons and the quantam theory of loops, and quantum strings and random surfaces. This book is aimed at postgraduate students studying field theory and statistical mechanics, and for research workers in continuous global theory
Investigation of "fur-like" residues post dry etching of polyimide using aluminum hard etch mask
No full textThe authors found that oxygen plasma etching of polyimide (PI) with aluminum (Al) as a hard-etch mask results in lightly textured arbitrary shaped “fur-like” residues. Upon investigation, the presence of Al was detected in these residues. Ruling out several causes of metal contamination that were already reported in literature, a new theory for the presence of the metal containing residues is described. Furthermore, different methods for the residue free etching of PI using an Al hard-etch by using different metal deposition and patterning methods are explored. A fur-free procedure for the etching of PI using a one step-reactive ion etch of the metal hard-etch mask is presented.Accepted author manuscriptElectronic Components, Technology and Material
The Sphinx Between the First and Second Pyramids. From a Photograph Taken by the Author about 6 a.m., After Sleeping at the Foot of the Sphinx.
No full textCaption: "The Sphinx Between the First and Second Pyramids.From a photograph taken by the Author about 6 A.M., after sleeping at the foot of the Sphinx."The Great Sphinx with two pyramids behind. Black-and-white photograph
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