We report fast readout of the motion of a carbon nanotube mechanical resonator. A close-proximity high electron mobility transistor amplifier is used to increase the bandwidth of the measurement of nanotube displacements from the kHz to the MHz regime. Using an electrical detection scheme with the nanotube acting as a mixer, we detect the amplitude of its mechanical motion at room temperature w...

nanocomposite vulcunizates based on styrene-butadiene rubber (sbr), organoclay and a conventional sulfur curing system were prepared by melt blending process in an internal mixer. in order to study the effects of the type of interfacial compatibilizer on the properties of sbr and clay nanoparticles,three types of compatibilizers, maleic anhydride grafted ethylene-propylene diene rubber (epdm-g-...

this paper presents a design of an uwb downconversion integrated cmos resistive ring mixer with linear voltage regulator (lvr), to supply required biasing voltages for the mixer section. the designed mixer circuit has been optimized for using in heart rate extraction system with microwave doppler radar at 2.4ghz frequency. this mixer needs 2 dc bias voltages equal to 0.5 and 1 volts for its bes...

mixing conditions of nbr/pvc nanocomposites such as mixing temperature, rotor speed and mixing time are determining parameters in rheological, mechanical and morphological properties of the compound. three levels were chosen for each parameter using design expert software via box-behnken method. the nanocomposite samples were melt-mixed in brabender internal mixer. the effect of various mixing ...

In this study, epoxy composite specimens reinforced with multi-walled carbon nanotube filler were fabricated using shear mixer and ultra-sonication processor. The mechanical and thermal properties of the fabricated specimens were measured and evaluated. From the electron microscope images and the results from the measurements of tensile strengths, the specimens having 0.6 wt% nanotube content s...

This paper investigates the transient behavior of a novel design an industrial mixer incorporating additional work head movement. In contrast to conventional models, this consists elastic torsion bar with its longitudinal axis oriented orthogonally main drive shaft axis. Using hang workhead adds degree freedom, greatly improving mixing fluids or powders. The motion electro-mechanical device was...

Radio astronomy requires SIS mixers and receivers with very high stability. The goal for the total power stability of the ALMA receivers is 1x10 over 1 second. The SIS mixer is one of the most critical components in the receiver signal chain determining stability. Most changes in mixer noise and gain are due to variations of its operating conditions. In this paper we present accurate measuremen...

Frequency translation which converts the original signal to a much lower baseband frequency signal is a vital role in the RF receiver design. In this work, a high linear down-conversion Gilbert cell mixer at 100MHz is designed using TSMC 0.18μm RF CMOS process. Linearity is an important performance measure in RF circuits particularly in mixer design. In this paper, the two types of linearizatio...

We are developing a mobile heterodyne terahertz system based on hot electron bolometer (HEB) mixer receivers to both image and obtain spectra from biological samples. An HEB mixer provides unprecedented sensitivity and spectral resolution at terahertz frequencies. We have recently demonstrated a lownoise heterodyne passive imager operating at 0.85 THz [1]. A heterodyned HEB detector integrated ...

9 The effect of mixer shear strain rate on the performance of a model 10 micro-crystalline cellulose pharmaceutical paste undergoing extru11 sion–spheronisation was studied using a laboratory scale planetary 12 mixer and a screw-based mixer. The maximum shear strain rate in 13 each mixer was estimated. Five pastes were prepared, one each at 14 97 and 265 s−1 in the planetary mixer, and one each...