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Sticker systems, a computability model introduced by L. Kari et al. (1998) are language generating devices based on the sticker operation. In this paper, a theoretical study about a new class of P system based on the sticker operation has been presented. Such a system has double stranded sequences with sticky ends as objects and sticker operations as evolution rules in its regions. We compare the...
High-Brightness Light Emitting Diodes (HB-LEDs) are considered as a remarkable lighting device due to their high reliability, chromatic variety and increasing efficiency. As a consequence, a high number of solutions for supplying LED strings are coming out. One-stage solutions are cost-effective, but their efficiency is low as they have to fulfill several purposes with only one converter: Power Factor...
In this paper the reliability of high power LED street lamp subjected to temperature cycle is analyzed. Two kinds of finite element models of LED street lamp structure with 60W input power are established by using ANSYS software. The temperature cycling condition from −5°Cto 50°C is loaded. The increasing and decreasing rate of temperature is 5°C / min and the holding time is 30 minutes. This process...
A single-turn magnet pulsed power system at the National High Magnetic Field Laboratory (NHMFL) at Los Alamos was originally designed to study actinide samples in extremes of high magnetic field (to 300 Tesla) [1, 2]. A simple modification to the single-turn magnet has converted it to a fast turnaround dynamic high pressure measurement system for Isentropic Compression Experiments (ICE). This paper...
Gas puff z-pinch experiments have been proposed for the refurbished Z (ZR) facility for CY2011. Previous gas puff experiments1 on pre-refurbishment Z established a record for laboratory fusion neutron yield; new experiments will establish gas puff capability on ZR and should surpass previous neutron and X-ray yields. We present ALEGRA resistive-MHD simulations of planned experiments with deuterium...
The 1D radiation MHD simulation studies [A.L. Velikovich, et al., ICOPS2010, Norfork, VA / DPP2010, Chicago, IL] of deuterium (D) double-shell gas-puff Z-pinch implosions driven by the Sandia refurbished Z accelerator have shown that the thermal fusion neutron yields can be increased up to ∼5×1014 if D in the outer shell is replaced with a dense high-Z gas that can generate a substantial radiative...
Equation of state (EOS) information of high-atomic number materials may be obtained via cylindrical liner implosion experiments at the Sandia National Laboratories Z facility. X-ray radiography measurements, beyond the current backlighting capabilities at Z (Z-Beamlet)1, are desired for these experiments. Required characteristics of the x-ray source include: short pulse on the order of a picosecond,...
This paper presents the reduction of frictional drag by using the slip on the interface of convex air bubble. The visualization shows that the convex bubbles formed naturally in the hydrophobic cavity array positioned along a microchannel with time. The size of the bubbles depended on the size of the cavity size. The velocity distribution was also displayed by using a micro-PIV measurement. Then,...
We report the fabrication and testing of an ionic electrospray propulsion system (iEPS) for maneuvering small satellites in space. Compared with previous ionic electrospray thrusters [1–3], our devices have emission tip arrays made of porous metal that ensure more uniform flow and higher currents while maintaining the high power and propellant efficiencies inherent in these devices. Fabrication of...
Micro-Raman spectroscopy and interval Partial Least Square (iPLS) multivariate analysis have been used for determining glucose concentration in various commercial sport drinks. By employing a visible excitation light (633 nm), micro-Raman spectra in the 600–1600 cm−1 wavenumber shift region have been recorded, showing well defined and separated vibrational fingerprints of the various contained sugars...
The new areas of technical exploitation of robotics systems has recently set new trends for the robotic actuation by demanding more versatile systems which can cope with unpredictable interactions within not well defined environments and work in close vicinity with the human. Following these trends, this work presents the development of a new actuation system with embodied characteristics such as...
The short to mid-infrared spectral regions are key to many applications that require low-cost and spectrally selective sources of coherent radiation. To name a few applications, they range from trace gas spectroscopy to process control, environmental safety monitoring, and testing of infrared countermeasure systems.
Conventional chain coding techniques require random access to the input image. For stream processing, it is necessary to perform all of the processing in a single raster based scan. An FPGA implementation adds the constraint of processing one pixel per clock cycle. A new algorithm that meets these constraints is described. It is based on run-length encoding the horizontal cracks between object and...
This work presents a quantitative evaluation of subjects' tactile ability to discriminate small virtual ridge patterns through a portable-wearable tactile device. The virtual patterns have been recreated by controlling the vertically moving pins of the device. Psychophysical experiments were performed to measure subjects' thresholds for spatial variation discrimination of ridge patterns. Moreover,...
This paper presents a mixed-reality system for the training of operators (biologogist/neuroscientists) on fully teleoperated biomanipulations. These tasks are traditionally performed via direct manual control of the biomanipulation equipment while looking through the binoculars of a microscope. However, direct manual control makes the conventional systems susceptible to even very small operator errors,...
Active Power Factor Correctors (PFCs) are needed to design ac-dc power supplies with universal input voltage range and sinusoidal input current. The classical method to control PFCs consists in two feedback loops and an analog multiplier. Hence, the input current is sinusoidal and it is in phase with the input voltage. However, a bulk capacitor is needed to balance the input power and the output power...
Current source inverters offer advantages of voltage boost, short circuit protection, reduced EMI and direct regeneration. While CSI control strategies are less developed than for a VSI, the topologies are functional duals and have much in common in a control sense. In particular, since CSI voltage regulation is the dual of VSI current regulation, current regulation control strategies for a VSI can...
We report the development of strain compensated InGaAs/AlAs(Sb)/InP quantum cascade lasers emitting in the wavelength range of 3.3–3.8µm with high peak optical power (up to 17W at 300K), and high temperature operation (up to 400K).
Image super-resolution is generally regarded as consisting of three steps - image registration, fusion, and deblurring. This paper presents a novel technique for resampling a non-uniformly sampled image onto a uniform grid that can be used for fusion of translated input images. The proposed method can be very fast, as it can be implemented as a finite impulse response filter of low order (10th order...
High level hardware description languages aim to make hardware design more like programming software. These languages are often used to accelerate legacy software algorithms by porting them to an FPGA based hardware implementation. Porting does not always result in efficient architectures as the original algorithms are usually developed and optimized to run on a serial processor. To obtain an efficient...
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