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Muller-Putz, Gernot,Leeb, Robert,Tangermann, Michael,Hohne, Johannes,Kubler, Andrea,Cincotti, Febo,Mattia, Donatella,Rupp, Rudiger,Muller, Klaus-Robert,Del R Millan, Jose IEEE 2015 Proceedings of the Institute of Electrical and Ele Vol.103 No.6
<P>In their early days, brain-computer interfaces (BCIs) were only considered as control channel for end users with severe motor impairments such as people in the locked-in state. But, thanks to the multidisciplinary progress achieved over the last decade, the range of BCI applications has been substantially enlarged. Indeed, today BCI technology cannot only translate brain signals directly into control signals, but also can combine such kind of artificial output with a natural muscle-based output. Thus, the integration of multiple biological signals for real-time interaction holds the promise to enhance a much larger population than originally thought end users with preserved residual functions who could benefit from new generations of assistive technologies. A BCI system that combines a BCI with other physiological or technical signals is known as hybrid BCI (hBCI). In this work, we review the work of a large scale integrated project funded by the European commission which was dedicated to develop practical hybrid BCIs and introduce them in various fields of applications. This article presents an hBCI framework, which was used in studies with nonimpaired as well as end users with motor impairments.</P>
Abedini, M R,Muller, E J,Bergeron, R,Gray, D A,Tsang, B K Macmillan Publishers Limited 2010 Oncogene Vol.29 No.1
Although Akt is a determinant of cisplatin (cis-diaminedichloroplatinum (CDDP)) resistance in ovarian cancer cells, which is related in part to its inhibitory action on p53 activation, precisely how Akt confers CDDP resistance is unclear. In this study, we show that CDDP induced p53-dependent Fas-associated death domain-like interleukin-1β-converting enzyme (FLICE)-like inhibitory protein (FLIP) degradation in chemosensitive ovarian cancer cells but not their resistant counterparts. CDDP induced FLIP–p53–Itch interaction, colocalization and FLIP ubiquitination in chemosensitive but not chemoresistant ovarian cancer cells. Moreover, although activated Akt inhibited CDDP-induced FLIP degradation and apoptosis in sensitive cells, these responses were facilitated by dominant-negative Akt expression in chemoresistant cells. Inhibition of Akt function also facilitated p53–FLIP interaction and FLIP ubiquitination, which were attenuated by p53 silencing. These results suggest that Akt confers resistance, in part, by modulating CDDP-induced, p53-dependent FLIP ubiquitination. Understanding the precise etiology of chemoresistance may improve treatment for ovarian cancer.
Differential Rapid Screening of Phytochemicals by Leaf Spray Mass Spectrometry
Muller, Thomas,Cooks, R. Graham Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.3
Ambient ionization can be achieved by generating an electrospray directly from plant tissue ("leaf spray"). The resulting mass spectra are characteristic of ionizable phytochemicals in the plant material. By subtracting the leaf spray spectra recorded from the petals of two hibiscus species H. moscheutos and H. syriacus one gains rapid access to the metabolites that differ most in the two petals. One such compound was identified as the sambubioside of quercitin (or delphinidin) while others are known flavones. Major interest centered on a $C_{19}H_{29}NO_5$ compound that occurs only in the large H. moscheutos bloom. Attempts were made to characterize this compound by mass spectrometry alone as a test of such an approach. This showed that the compound is an alkaloid, assigned to the polyhydroxylated pyrrolidine class, and bound via a $C_3$ hydrocarbon unit to a monoterpene.
Nonlinear dynamics of shear flows and plasma rotation in a simple laboratory plasma system
Tynan, G R,Diamond, P H,Holland, C,Muller, S H,Xu, M,Yan, Z,Yu, J Published jointly by The Institute of Physics and 2009 Plasma physics and controlled fusion Vol.51 No.12
<P>Nonlinear turbulent-shear flow interactions are directly measured in a cylindrical helicon plasma device and found to lead to the development of an azimuthally symmetric radially sheared azimuthal flow by the action of a turbulent Reynolds stress which transfers kinetic energy into the large-scale shear flow. Radially resolved measurements of the nonlinear kinetic energy transfer show that the flow is driven at the plasma boundary; temporally resolved flow measurements show a penetration of the resulting azimuthal flow into the central plasma region. The results provide an initial qualitatively test of theoretical predictions, and suggest how similar studies might be carried out in confinement devices.</P>
Polyurethane Foam Reinforced with Fibers Pineaplle Crown Biocomposites for Sorption of Vegetable Oil
Isabella Loureiro Muller Costa,Francisco Maciel Monticeli,Daniella R. Mulinari 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8
The concern in reducing the environmental impacts caused by human interference is increasing. Thus, theobjective of this study was to generate a sustainable solution for sorption of vegetable oil. It was developed and characterizedbiocomposites obtained from polyurethane derived from castor oil reinforced with fibers from the crown of pineapple forsorption of vegetable oil. The biocomposites were obtained by mass mixing the polyol with the prepolymer (1:1) andreinforced with 5 to 20 % (wt/wt) pineapple crown fiber in 18 and 35 mesh granulometry. The biocomposites and purepolyurethane were characterized by scanning electron microscopy (SEM), optical microscopy (OM), X-ray Diffraction(XRD), porosimetry, contact angle, and density. Sorption tests were carried out on the biocomposites and pure polyurethane(PU). The sorption capacity of the biocomposites was evaluated as a function of the fiber content inserted in the matrix. Results of the sorption tests showed that the biocomposites reinforced with fibers of 18 mesh (20 % wt) presentedapproximately twice the sorption capacity when compared to pure PU and others biocomposites results, due to high porositycombined with high surface area, which influenced directly in the oil sorption. Response surface methodology (RSM)tecnique confirmed the influence fibers granulometry and content on oil sorption.
Over-voltage Trigger Device for Marx Generators
M. Sack,R. Stangle,G. Muller 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
For treatment of plant tissue with pulsed electric fields in large scale, synchronized operation of several Marx generators is required in order to minimize the low-field regions inside the electroporation reactor and to overcome the current limitations of a single pulse circuit. Hence, the Marx generators must be triggered. If long-term operation without service is to be achieved, these generators are triggered by over-volting the first spark gap without the use of an additional electrode for ignition, which would cause increased wear. A trigger device for over-volting the first spark gap of a Marx generator has been designed. It has been tailored to replace the charging coils between the 1s and the 2nd stage of an already existing Marx generator. In order to overcome the requirements for insulation to ground potential, the trigger device is powered by the charging current of the Marx generator. This paper describes some design issues.
Myoelectric Control of Artificial Limbs—Is There a Need to Change Focus? [In the Spotlight]
Ning Jiang,Dosen, S.,Muller, K-R,Farina, D. IEEE 2012 IEEE signal processing magazine Vol.29 No.5
<P>In this article, the basic concept of myoelectric control and the state of the art in both industry and academia will be presented. It will emerge that there is a gap between industrial and academic achievements and that this gap will continue to expand unless a change of focus in systems for myoelectric control occurs.</P>