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Rapidly quenched strip brazing alloys for high-temperature brazing of niobium-based alloys
The composition of the brazing alloys for brazing niobium-based alloys is outlined. The method for producing brazing alloys based on Ti and Zr in the form of flexible strips is described. The relationships governing the formation of brazed joints are discussed.
Influence of the morphology of thermoplastic elastomers on the properties of bitumen composites
Bitumen properties may be successfully modified if the polymeric modifiers have the ability to control the elastic and plastic properties within wide temperature ranges of −30/−40°C to +45/+60°C. The article presents a study on the ability of two thermoplastic elastomers, thermoplastic block co-polymer styrene–styrene…
Live three-dimensional transthoracic echocardiography of left ventricular intramyocardial hydatid cyst
An 18-year-old male was referred to us for chest discomfort. A physical examination showed normal findings. The chest X-ray was also normal. ECG showed sinus rhythm and ischaemic changes in apico-infero-posterior myocardium. Two-dimensional-TTE (2DTTE) (Supplementary data online, Movie S1) showed a single, large oval…
Optical Sensors: One‐Step Fabrication of Multifunctional Core‐Shell Fibres by Co‐Electrospinning (Adv. Funct. Mater. 18/2011)
Core–shell fibers, fabricated by co-electrospinning, are presented by Antonio L. Medina-Castillo, Jorge F. Fernández-Sánchez, and co-worker on page 3488. The fiber shell is formed by a fluorescent pH-sensitive co-polymer while the core is formed by magnetic nanoparticles and an oxygen indicator dispersed in poly(methy…
Design of extreme anamorphic laser illumination systems
Many laser applications, for example material processing or fluorescence imaging, require intense and uniform illumination over a rectangular, slit shaped area with extreme aspect ratio: The short dimension of the illumination field typically requires diffraction limited imaging, respectively focusing, on a micrometer…
Straylight measurements of immersed gratings for high-resolution spectroscopy in the near infrared
New immersed grating technology is needed particularly for use in imaging spectrometers that will be used in sensing the atmosphere O2A spectral band (750nm - 775 nm) at spectral resolution in the order of 0.1 nm whilst keeping a high efficiency and low stray light. In this work, an Ion-beam etched grating in a fused-…
Donor Acceptor Bond in [NPCl2]3—MCl3 Adducts, a DFT Study and Comparison of Results with Experimental X‐Ray Data
Molecular structures of [PCl2N]3‐MCl3 adducts, M=B, Al, Ga, In, Tl, have been studied employing HF, B3LYP*, B3LYP , PW91, BLYP, OLYP, BP and LDA methods using DZP basis set (as defined in Amsterdam Density Functional, ADF, package). Some aspects of adduct formation like considering the difference between Front and Bac…
New iterative flux based in the design strategy for freeform surfaces generation for LED lighting technology
We present a new strategy to calculate an optimized refractive freeform surface for illumination purposes with a LED source. The goal of this paper is to present a new iterative flux based strategy to design plastic lens for LED lighting solutions. The new strategy considers the energy emission pattern of the LED and…
Homogeneous-aligned high-transmission and fast-response liquid crystal display with three-layer electrodes
Homogeneous-aligned high
Investigation of the Corrosion Protection of Ni Deposition and Subsequent Annealing Temperature with Flow of Nitrogen on AISI 304 and AISI 316 Stainless Steels
AISI 304 (UNS S30400) and AISI 316 (UNS S31600) stainless steels were coated with a 250 nm Ni film by electron beam deposition and post-annealed at different temperatures with a flow of 600 cm3 min−1 Ni. The samples were corrosion tested in 1.0 M sulfuric acid (H2SO4) solution using a potentiodynamic technique. Crysta…
Droplet Exchange Kinetics in Microemulsions
The dynamic behavior of water-in-oil microemulsions (w/o), stabilized by sodium bis (2-ethyl-hexyl) sulphosuccinate (AOT), has been studied by means of stop flow method using spectroscopic detection. Kinetic model based on the ferroferric reaction was developed. Interdroplet exchange rate constant, k ex , associated w…
Specifications of analog-to-digital converter for uncooled infrared readout circuits
This paper presents how to specify an ADC to digitalize the analog video of the uncooled infrared readout circuit. In a first part the main features will be discussed to select the right resolution, SNR, THD and ENOB of the converter. In a second part the characteristics more specifically sensitive for an ADC integrat…
Source Optimization in Optical Lithography
A method to reshape the structure of the optical source in optical lithography is presented. The goal of this reshaping is to provide a new ability to perform resolution enhancements to a cutting edge optical lithographic system. The redesign of the source’s shape is performed through an optimization scheme, which has…
Gas Transport in Microcapillaries, Nanocapillaries, and Porous Media
Transport of multicomponent gas mixtures in capillaries and porous media plays a vital role in many industrial applications. The engineering importance of the subject is evident from the large number of experimental and theoretical investigations performed by many authors over the last century. Catalytic reactive ows…
DESIGN OF A HIGHLY OPTIMISED VACUUM CHAMBER SUPPORT FOR THE LHCB EXPERIMENT
The beam vacuum chamber in the LHCb experimental area passes through the centre of a large aperture dipole magnet. The vacuum chamber and all its support systems lie in the acceptance of the detector, so must be highly optimised for transparency to particles. As part of the upgrade programme for the LHCb vacuum system…
不同退火方式对0.7BiFeO 3 -0.3PbTiO 3 薄膜的铁电性能及漏电流的影响
利用溶胶-凝胶法在LaNiO 3 /SiO 2 /Si衬底上制备了0.7BiFeO 3 -0.3PbTiO 3 (BFPT7030)薄膜, 研究了快速退火及常规退火两种不同的后续退火处理方式对薄膜铁电性能及漏电流性能的影响. XRD测试表明, 经快速退火处理的BFPT7030薄膜结晶完好, 呈现出单一的钙钛矿相. SEM测试结果显示, 经快速退火处理的BFPT7030薄膜结晶充分, 但经常规退火处理的BFPT7030薄膜表面致密性较好, 且在升温速率为2℃/min时薄膜的晶粒更细小. 经快速退火处理的BFPT7030薄膜的铁电性能较为优异, 在升温速率为20℃/s时, 其剩余极化 P r 为22 μC/cm 2 , 矫顽场 E c…
Optical glass: dispersion in the near infrared
With deliveries of optical glass lots measurement data are given for the visible range usually from 436 nm (g-line) to 656 nm (C-line). Sometimes the question arises if refractive index values in the near infrared can be calculated from these data. With near infrared we mean the range from the C-line up to 1700 nm in…
Evidence for incompressible states in a metal-graphene tunnel junction in high magnetic field
We present transport measurements of tunnel junctions made between Cu and graphene in a magnetic field. We observe a transition to a Landau-level-like structure at high fields, as well as a set of sharp features in the tunneling spectra that shift with gate and tunnel probe voltage along the lines of constant charge d…
Optical characterization of proton irradiated diamond
Manufacturing of miniaturized photonic devices based on diamond technology is possible by implanting the pristine material with highly energetic particles. Here we report on the spectral characterization of the optical constants of proton-irradiated diamond. Absorption of the irradiated zones was estimated in the UV-v…