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Showing 1 to 12 of 167 entries
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Stress research: some theoretical and methodological issues.

Image--the journal of nursing scholarship

Lowery BJ.
PMID: 3644783
Image J Nurs Sch. 1987;19(1):42-6. doi: 10.1111/j.1547-5069.1987.tb00587.x.

No abstract available.

Time-lenses for time-division multiplexing of optical OFDM channels.

Optics express

Geng Z, Corcoran B, Zhu C, Lowery AJ.
PMID: 26698462
Opt Express. 2015 Nov 16;23(23):29788-801. doi: 10.1364/OE.23.029788.

Time-lenses provide a promising platform for novel, broadband optical signal processing. However, in order to minimize system penalties, design constraints must be adequately taken into account. We investigate the impact of third-order-dispersion and nonlinear distortion on the performance of...

Widely-tunable low-phase-noise coherent receiver using an optical Wadley loop.

Optics express

Lowery AJ, Corcoran B, Zhu C.
PMID: 26367649
Opt Express. 2015 Jul 27;23(15):19891-900. doi: 10.1364/OE.23.019891.

The Wadley Loop is a method of down-converting RF signals over a wide frequency range using a low-quality widely-tunable oscillator and a high-stability frequency comb reference. Together the widely tunable oscillator and high-stability comb source provide a widely-tunable high-stability...

Integrated microwave photonic splitter with reconfigurable amplitude, phase, and delay offsets.

Optics letters

Zhuang L, Burla M, Taddei C, Roeloffzen CG, Hoekman M, Leinse A, Boller KJ, Lowery AJ.
PMID: 26625065
Opt Lett. 2015 Dec 01;40(23):5618-21. doi: 10.1364/OL.40.005618.

This work presents an integrated microwave photonics splitter with reconfigurable amplitude, phase, and delay offsets. The core components for this function are a dual-parallel Mach-Zehnder modulator, a deinterleaver, and tunable delay lines, all implemented using photonic integrated circuits. Using...

Metastatic adenocarcinoma after laparoscopic supracervical hysterectomy with morcellation: A case report.

Gynecologic oncology case reports

Turner T, Secord AA, Lowery WJ, Sfakianos G, Lee PS.
PMID: 24371686
Gynecol Oncol Case Rep. 2013 Mar 16;5:19-21. doi: 10.1016/j.gynor.2013.03.002. eCollection 2013.

•Uterine morcellation is common in minimally invasive hysterectomy but should be performed with caution due to risk of unsuspected malignancy.•Intraoperative techniques should be considered to minimize dissemination of endometrial tissue during morcellation.•Strategies to ensure accurate pathologic evaluation of morcellated...

Comparisons of spectrally-enhanced asymmetrically-clipped optical OFDM systems.

Optics express

Lowery AJ.
PMID: 26907048
Opt Express. 2016 Feb 22;24(4):3950-66. doi: 10.1364/OE.24.003950.

Asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) is a technique that sacrifices spectral efficiency in order to transmit an orthogonally frequency-division multiplexed signal over a unipolar channel, such as a directly modulated direct-detection fiber or free-space channel. Several methods...

Improved nonlinearity precompensation for long-haul high-data-rate transmission using coherent optical OFDM.

Optics express

Du LB, Lowery AJ.
PMID: 19030079
Opt Express. 2008 Nov 24;16(24):19920-5. doi: 10.1364/oe.16.019920.

We show that the performance of precompensation of fiber nonlinearity in coherent optical OFDM systems operating at up to 60 Gbps/polarization can be improved by electrical filtering the precompensation signal. The optimal filter bandwidth is related to the FWM...

Background genotype modulates the effects of γ-PKC on the development of rapid tolerance to ethanol-induced hypothermia.

Addiction biology

Bowers BJ, Collins AC, Wehner JM.
PMID: 20575819
Addict Biol. 2000 Jan 01;5(1):47-58. doi: 10.1080/13556210071261.

The role of γ-PKC in initial sensitivity and in the development of rapid tolerance to the hypothermic effects of ethanol were investigated in γ-PKC null mutant mice. Effects of the single gene mutation were evaluated on three different genetic...

The validity of "Odd and Even" channels for testing all-optical OFDM and Nyquist WDM long-haul fiber systems.

Optics express

Du LB, Lowery AJ.
PMID: 23262886
Opt Express. 2012 Dec 10;20(26):B445-51. doi: 10.1364/OE.20.00B445.

We investigate experimentally the validity of testing all-optical OFDM and Nyquist WDM systems using interleaved test channels derived from only two data sources. These "odd and even" channels are insufficiently decorrelated, so experiments underestimate the inter-carrier interference (ICI). Additionally,...

Pilot-based XPM nonlinearity compensator for CO-OFDM systems.

Optics express

Du LB, Lowery AJ.
PMID: 22274114
Opt Express. 2011 Dec 12;19(26):B862-7. doi: 10.1364/OE.19.00B862.

We experimentally verify that pilot-based nonlinearity compensation is effective for mitigating XPM in CO-OFDM systems, if SPM is compensated first. A 6-dB increase in the nonlinear limit was produced by pilot-based XPM compensation after a single-step SPM compensator in...

Functional expression and characterization of the C. elegans G-protein-coupled FLP-2 Receptor (T19F4.1) in mammalian cells and yeast.

International journal for parasitology. Drugs and drug resistance

Larsen MJ, Lancheros ER, Williams T, Lowery DE, Geary TG, Kubiak TM.
PMID: 24533288
Int J Parasitol Drugs Drug Resist. 2012 Nov 15;3:1-7. doi: 10.1016/j.ijpddr.2012.10.002. eCollection 2013 Dec.

Profound neuropeptide diversity characterizes the nematode nervous system, but it has proven challenging to match neuropeptide G protein-coupled receptors (GPCR) with their cognate ligands in heterologous systems. We have expressed the Caenorhabditis elegans GPCR encoded in the locus T19F4.1,...

Silicon microring modulator-based RF mixer for millimeter-wave phase-coded signal generation.

Optics letters

Xie Y, Zhuang L, Lowery AJ.
PMID: 28708158
Opt Lett. 2017 Jul 15;42(14):2742-2745. doi: 10.1364/OL.42.002742.

Phase-coded radio frequency (RF) pulses are widely adopted for radar systems as an effective signal format to enable high-range resolution. However, generating such signals conventionally requires high-speed electronics and complex RF circuitry that impose burdens on the system cost...

Showing 1 to 12 of 167 entries