22,083 research outputs found
Ion distribution preferences in ternary crystals Zn xCd 1−x Te, Zn 1−x Hg xTe and Cd 1−x Hg xTe
No full textSimilar ternary semiconductors are sometimes associated with widely different structures characterized by different site occupation preferences. We have used far-infrared (FIR) spectra to determine the site occupation preference coefficients for three ternary semiconductor alloys: ZnCdTe, ZnHgTe and CdHgTe and, in the case of ZnHgTe, have validated it by X-ray absorption fine structure (EXAFS) analysis. While ZnCdTe spectra exhibit the canonical configuration with eight phonon lines free of vibrational defect lines and only a slight departure from a random ion distribution, CdHgTe spectra show the eight canonical phonon modes plus an additional vibrational defect line and constant preference coefficients. In contrast, two defect lines and only four modes characterize ZnHgTe spectra, as extreme preferences prevent the formation of two of the five expected tetrahedral configuration arrangements. Moreover, for this system, comparison with EXAFS data points out the vibrational nature of both the extra lines. The analysis clearly shows that assuming a Bernoulli distribution of the component configurations of semiconductors may lead to wrong assessments of the evolution of its properties with relative content.JRC.D.5 - Food Safety and Qualit
Installation and Instrumentation of Offshore Piles
No full textTypically offshore piles consist of open ended steel pipes which are installed by driving procedures using large steam and/or hydraulic hammers. Often drivability analyses are performed beforehand to establish the optimum combination of pile and hammer for given soil conditions and required pile penetrations. To further monitor and guide actual pile installations, pile and hammer instrumentations are increasingly employed. In this paper drivability analyses and instrumentation methods are briefly explained, as well as the interpretation of instrumentation data. For sake of completeness also two papers are appended in this document. One paper giving more theoretical backgrounds on dynamic pile measurements; a second paper summarising some recent instrumentation projects, successfully completed throughout the offshore world
EXAFS data resolved into individual site occupation preferences in quaternary compounds with tetrahedral coordinated structure
No full textFilter method and silicon detectors to measure the temperature of a hot dense thermal deuterium plasma from its quantum bremsstrahlung
No full textHigh resolution spectra of defects in CdTe obtained in far-infrared region using synchrotron radiation
No full textThe present work analyses the lattice deformations induced in the crystals with tetrahedral coordination by the presence of impurity hydrogen and oxygen atoms. Such deformations can be monitored by analyzing of far-infrared (FIR) vibration spectra. FIR experiments carried out on hydrogenated CdTe crystals that successfully revealed the presence and localization of hydrogen atoms within the lattice. (c) 2006 Elsevier B.V. All rights reserved
A study towards yield optimization for the Expanded Tobacco II process of Philip Morris Holland B.V.
No full textIn the tobacco industry, Philip Morris Holland B.V., part of Philip Morris International, is a cigarette manufacturing company. Within its Primary department tobacco leaves are pretreated in such a way to meet the requirements for cigarette production, which is done in the Secondary department. Tobacco pretreatment processes are: cutting, adding moisture, sauces, semi-finished products and flavors. One of the semi-finished products is expanded tobacco. The aim of a expanded tobacco production process is to stretch the tobacco cells in order to create a permanent volume increase. Tobacco expansion within Philip Morris Holland B.V. is accomplished by means of the Dry Ice Expanded Tobacco technology. In several process steps tobacco cells get impregnated with liquid CO2, which together with the intercellular moisture reacts whereby CO2-hydrate forms. After a impregnation cycle has been completed, the tobacco cells are quickly heated to a temperature of 300ºC. Due to the temperature increase, the CO2-hydrate inside the tobacco cells disintegrates and causes enough gas, and as a result inner pressure, to stretch the cells to the desired volume. The hot expanded tobacco gets cooled down and finally moisture is added to meet the final product requirements. During the several process steps multiple tobacco waste flows, which consist of tobacco fines (dust), are separated from the main tobacco material flow. Since tobacco in general is an expensive material Philip Morris Holland B.V. has the demand for waste reduction…Mechanical, Maritime and Materials EngineeringMarine and Transport TechnologyTransport Engineering and Logistics2014.TEL.783
IMPLEMENTATION BLUETOOTH LOW ENERGY ON THE MEDICAL SUPPORTING DEVICE
No full textNon-compliance from a patient is a serious problem, with a big consequence in case of health and costs. ECCT B.V. tries to develop some supporting devices expected to help patients to report their compliance. One of these supporting devices is a dispenser. These devices record data about time and other clinically relevant information. The electronic circuit also contains RFID technology, it is possible for Near Field Communication (NFC) enabled mobile telephone or a NFC reader to take the stored data.
If we compare Bluetooth with NFC, Bluetooth has an advantage in range, Bluetooth has wider range than NFC. When the dispenser starts using BLE, there is no need for us to make the dispenser close to BLE enabled mobile phone or reader, we can separate it in some distance.
The antenna design was done by using CST Microwave Studio 2009, provided by Fontys Hogescholen. In this project, author uses printed Inverted F Antenna as the antenna. Inverted F Antenna has some advantages and also fulfills the requirements for transmitting and receiving data. From the simulation we can find out there is 7 parameters affected on the antenna performance. Length is one of the parameters affected to the antenna resonant frequency.
From the measurement result, Bluetooth Low Energy for “Firefly” can reach 10 meters range and can stand for 3 years using coin cell battery. In the future, the “Firefly” should be developed in thinner PCB, 0.5mm PCB thickness, because dispenser requires 0.5 mm PCB thickness for the perfect final product.
Keywords: Near Field Communication, Bluetooth Low Energy, and Antenn
Occupation preference values in doped CmIm' multinaries from EXAFS and FTIR correlative analysis
No full textWe discuss which x-ray absorption fine structure (EXAFS) data of binary doped CmIm' compound structures can be unfolded to determine elemental bond distances and the deviations from random configurations due to site preference occupations (SOPs). SOP-deviation estimations can be further confirmed by independent Fourier transform infrared (FTIR) data analysis. The limits and restrictions of our model are presented and discussed.The authors would like to thank A. Balerna for constructive comments. The work was partially supported by the European Community Research Infrastructure Integrating Activity “Study of Strongly Interacting Matter–Hadron Physics” (cf. contract number RII-CT-2004-506078) of the Sixth Framework Programme (FP6)
Redesign of the control model at SEW-EURODRIVE B.V.
No full textSEW-EURODRIVE B.V. (SEW NL) is a manufacturer of drive products located in Rotterdam in The Netherlands and is a whole subsidiary of the German company SEW-EURODRIVE. SEW NL assembles drives and controllers. Each drive and controller is highly customizable according to the customers wishes and is assembled to order. Lead times are generally short (three workdays). Parts required for assembly of drive products can roughly be divided into two categories: eKanban parts and MRP parts. eKanban parts are small and cheap parts that are put into bins in bulk that are located at places where they are required. Whenever a bin is empty it will be scanned and new parts are ordered. MRP parts are large, more expensive and located in the internal warehouse. These parts are picked before the production order starts. Lead times of SEW NL are shorter than lead times of the supplier of SEW NL (SEW Germany), usually three workdays compared to two to four weeks of SEW Germany. Also, drives and controllers are assembled to order. Because of this, stock is required to meet the lead time requirements. In order to ensure parts never run out of stock, orders are only scheduled when all the required parts are available on the date for which the order is scheduled...Mechanical, Maritime and Materials EngineeringMarine and Transport TechnologyTransport Engineering and Logistics2014-TEL.784
Occupation preference values in doped CmIm' multinaries from EXAFS and FTIR correlative analysis
No full textWe discuss which x-ray absorption fine structure (EXAFS) data of binary doped CmIm' compound structures can be unfolded to determine elemental bond distances and the deviations from random configurations due to site preference occupations (SOPs). SOP-deviation estimations can be further confirmed by independent Fourier transform infrared (FTIR) data analysis. The limits and restrictions of our model are presented and discussed.The authors would like to thank A. Balerna for constructive comments. The work was partially supported by the European Community Research Infrastructure Integrating Activity “Study of Strongly Interacting Matter–Hadron Physics” (cf. contract number RII-CT-2004-506078) of the Sixth Framework Programme (FP6)
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