1,220 research outputs found
Crystal Kuykendall - 04/17/2006 - (Riall Lecture Series)
No full textBegun in 1988, the E. Pauline Riall Lecture Series brings to the University and community outstanding national lecturers in the field of education. The series was established by the late Miss Riall, long-time principal and teacher of the former Salisbury University's Campus School. A generous bequest was provided by Miss Riall's will to fund this special program.
Crystal Arlene Kuykendall, Author and Educational Consultant – Riall Speaker on 4/17/2006 (pm) and 4/18/2006 (am).https://www.youtube.com/watch?v=vFmq73VLgZ
Crystal Kuykendall - 04/18/2006 - (Riall Lecture Series)
No full textBegun in 1988, the E. Pauline Riall Lecture Series brings to the University and community outstanding national lecturers in the field of education. The series was established by the late Miss Riall, long-time principal and teacher of the former Salisbury University's Campus School. A generous bequest was provided by Miss Riall's will to fund this special program.
Crystal Arlene Kuykendall, Author and Educational Consultant – Riall Speaker on 4/17/2006 (pm) and 4/18/2006 (am).https://www.youtube.com/watch?v=gaaRMo-_A6
The self-seeded growth of InAsSb nanowires on silicon by metal-organic vapor phase epitaxy
No full textWe present a study on the growth of InAs1-xSbx alloy nanowires directly on Si (111) substrates via a self seeded mechanism for the first time. Through varying group V flow rate ratios, InAs1-xSbx nanowires with x = from 0 to 0.43 are obtained. It is found that Sb content has a significant effect on the morphology and crystal quality of the formed InAs1-xSbx nanowires. Furthermore, the axial and radial growth rates of the nanowires change in opposite trends with increasing group V flow rate ratio. This indicates that the growth rate of InAs1-xSbx nanowires is ultimately determined by Sb compositions of the nanowires. In addition, the scanning electron microscopy and transmission electron microscopy measurements reveal that the dimensional uniformity and crystal quality of lnAsSb nanovvires with a small amount of Sb compositions are greatly improved compared to the reference lnAs nanovvires. The effect mechanism of Sb on the growth of InAs1-xSbx nanovvires is clarified, which will be a guide for making high quality IRAs' Sb, nanovvires and relevant helerosiruclure devices in the future. (C) 2014 Elsevier B.V. All rights reserved,http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000335905400005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701CrystallographyMaterials Science, MultidisciplinaryPhysics, AppliedSCI(E)[email protected]
Structure electronic design of a crystal filter for high accuracy multi-mode crystal oscillator
No full textModern communication systems have a strong need for low-cost and high-stability frequency references. Although low-cost crystal oscillators can easily be realized and are available to the market in large quantities, crystal oscillators with frequency stability in the ppb(10^{-9}) range over a wide temperature range are only available at high costs. In 2018, SemiBlocks B.V. proposed an improved technique so-called Multi-Mode Crystal Oscillator MMXO. The MMXO determines the output frequency through a triple mode oscillator and corrects this by an algorithm running on the internal microprocessor. The advantage of the MMXO is that it uses regular AT-Cut crystals and the whole circuitry can be implemented in silicon, and the frequency selective network is implemented by digital technology. This results in a low-cost and high-stability crystal oscillator solution.However, the measurement result of the first generation MMXO showed that the large temperature dependent phase shift of the analog crystal chain significantly influences frequency stability of the MMXO. This inaccuracy is out of the compensation ability of the multi-mode system since it is highly dependent on the analog network rather than the crystal. For the improvement of the next generation MMXO product, this thesis aims at designing a CMOS crystal filter, which should reflect the characteristic of crystal accurately. Any change of resonance frequency of the tested crystal should accurately match that of the frequency characteristic of the crystal filter. The objective is to control frequency error below 10ppb for the three resonance tones of the tested crystal over -40 to 100 C.The design of the crystal filter follows a structured methodology and combines analysis and simulations in Cadence together with SLICAP (Symbolic LinearCircuit Analysis Program), which helps researchers quickly find the early design solution and show-stopper before circuit design. The crystal filter is a two-stage amplifier. The first stage is a transadmittance stage, which reflects the frequency characteristic of the crystal by a current output. The second stage is a transimpedance stage, which makes the output of the TA stage observable to the ADC of the MMXO system. The pre-layout simulations show the the frequency error of the base tone and the third overtone is close to ppb, while the fifth overtone has a large frequency error around ppb. The crystal filter allows full range input of the tested ADC and is stable under all typical corners, with power consumed by crystal, total current usage, and the chip area . The output-referred noise PSD of the base tone and the third overtone is and . which meets the noise requirements with enough design margin, while the fifth overtone fails with noise specs due to the quantization noise and aliased noise caused by ADC.Electrical Engineering | Microelectronic
Liquid Crystal Based Active Phase Modulator for Silicon Nitride Photonics Circuits at Near-Infrared
No full textWe demonstrate for the first-time voltage driven phase modulation with liquid crystal on SiN photonics at 874nm wavelength. We report a V pi L pi 0.72 V. cm with a loss of 1.8 dB/cm. (C) 2020 The Author(s)We demonstrate for the first-time voltage driven phase modulation with liquid crystal on SiN photonics at 874nm wavelength. We report a V pi L pi 0.72 V. cm with a loss of 1.8 dB/cm. (C) 2020 The Author(s)
Crystal isomorphisms for irreducible highest weight -modules of higher level
No full textthe revised version correct minor errors. To appear in Algebras and Representation Theory.International audienceWe study the crystal graphs of irreducible U_{v}(\hat{sl}}_{e})-modules of higher level l. Generalizing works of the first author, we obtain a simple description of the bijections between the classes of multipartitions which naturally label these graphs: the Uglov multipartitions. This is achieved by expliciting an embedding of the U_{v}(\hat{sl}}_{e})-crystals of level l into -crystals associated to highest weight modules
Crystal isomorphisms for irreducible highest weight -modules of higher level
No full textthe revised version correct minor errors. To appear in Algebras and Representation Theory.International audienceWe study the crystal graphs of irreducible U_{v}(\hat{sl}}_{e})-modules of higher level l. Generalizing works of the first author, we obtain a simple description of the bijections between the classes of multipartitions which naturally label these graphs: the Uglov multipartitions. This is achieved by expliciting an embedding of the U_{v}(\hat{sl}}_{e})-crystals of level l into -crystals associated to highest weight modules
The value of polymorphism RRO12ALA gene PPARG in violation of lipid peroxidation and antioxidant protection in patients with type 2 diabetes mellitus
No full textZiablytsev S. V., Mokrii V. Y., Crystal M. V. The value of polymorphism RRO12ALA gene PPARG in violation of lipid peroxidation and antioxidant protection in patients with type 2 diabetes mellitus. Journal of Education, Health and Sport. 2016;6(9):626-636. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.158861
http://ojs.ukw.edu.pl/index.php/johs/article/view/3888
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 755 (23.12.2015).
755 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Author (s) 2016;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial
use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 02.09.2016. Revised 24.09.2016. Accepted: 24.09.2016.
The value of polymorphism Rro12Ala gene PPARG in violation of lipid peroxidation and antioxidant protection in patients with type 2 diabetes mellitus
S. V. Ziablytsev, V. Y. Mokrii, M. V. Crystal
Bogomolets national medical university
Resume. The incidence of type 2 diabetes mellitus is increasing in Ukraine and worldwide. The severity of this disease is determined by the number of complications, which are based on lipid peroxidation (LPO). Today, the influence of gene polymorphisms Pro12Ala PPARG on oxidative and antioxidant processes is not in doubt. We studied the association between gene polymorphism Pro12Ala rs1801282 PPARG and intensification of lipid peroxidation and antioxidant systems (AOS) in 88 patients with type 2 diabetes, using analysis of variance. In the 12Pro allele carriers male found probable increased intensification of lipid peroxidation than in women, with increasing levels of DC (p=0,034) and MDA (p=0,001). Reducing the enzyme catalase level of AOC in patients with type 2 diabetes was observed in the case of genotype Pro12Pro gene PPARG on 21.7% compared with heterozygotes (F=8,17; p=0,005) and the presence of the allele 12Pro (F=6,28 , p=0,013). Found significantly higher activity of AOC in the form of increasing the level of α-TF (p=0,016) and catalase activity (p=0,034) among male patients with gene polymorphism Pro12Ala PPARG, than homozygotes for allele 12Pro.
Key words: lipid peroxidation; antioxidant system; type 2 diabetes mellitus; polymorphism Pro12Ala rs1801282 of gene PPAR
Realization of high-Q/V photonic crystal cavities defined by an effective Aubry-André-Harper bichromatic potential
No full textWe report on the realization of high-Q/V
photonic crystal
cavities in
thin silicon
membranes, with resonances around 1.55 μm wavelength. The cavity designs are based
on a recently proposed photonic
crystal implementation of the Aubry-André-Harper bichromatic potential,
defined from the superposition of two one-dimensional lattices with a non-integer ratio
between their periodicity constants. In photonic crystal nanocavities, this confinement mechanism
is such that optimized figures of merit can be straightforwardly achieved, in particular
an ultra-high-Q factor and diffraction-limited mode volume. Several silicon membrane photonic crystal nanocavities
have been realized with measured
Q-factors in the 1 × 106 range, as evidenced by resonant scattering. The
generality of the proposed designs and their easy implementation and scalability make
these results particularly interesting for realizing highly performing photonic nanocavities on
different material
platforms and operational wavelengths
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