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Abdenur JE, Sowa M, Simon M, Steenari M, Skaar J, Eftekharian S, Chang R, Ferdinandusse S, Pitt J. Medical nutrition therapy in patients with HIBCH and ECHS1 defects: Clinical and biochemical response to low valine diet. Mol Genet Metab Rep 2020; 24:100617. [PMID: 32642440 PMCID: PMC7334802 DOI: 10.1016/j.ymgmr.2020.100617] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/13/2020] [Accepted: 06/14/2020] [Indexed: 01/30/2023] Open
Affiliation(s)
- J E Abdenur
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA.,Department of Pediatrics, University of California Irvine, Orange, CA. USA
| | - M Sowa
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA
| | - M Simon
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA
| | - M Steenari
- Division of Neurology, CHOC Children's. Orange, CA, USA.,Department of Pediatrics, University of California Irvine, Orange, CA. USA
| | - J Skaar
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA
| | - S Eftekharian
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA
| | - R Chang
- Division of Metabolic Disorders, CHOC Children's, Orange, CA, USA.,Department of Pediatrics, University of California Irvine, Orange, CA. USA
| | - S Ferdinandusse
- Departments of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Diseases, Amsterdam, the Netherlands
| | - J Pitt
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, AU, Australia
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Skaar J, Wang L, Erdogan T. Synthesis of thick optical thin-film filters with a layer-peeling inverse-scattering algorithm. Appl Opt 2001; 40:2183-2189. [PMID: 18357226 DOI: 10.1364/ao.40.002183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present an efficient and accurate method for synthesis of optical thin-film structures. The method is based on a differential inverse-scattering algorithm and considers therefore both phase and amplitude reflectance data. We apply the algorithm to the synthesis of filters with arbitrary index layers and two-material filters consisting of only high- and low-index layers. The layered structure is approximated by a stack of discrete reflectors with equal distance between all reflectors. This mirror stack is in turn determined from the desired, complex reflection spectrum by a layer-peeling inverse-scattering algorithm. The complexity of the design algorithm is approximately the same as that of the forward problem of computing the spectrum from a known structure.
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Abstract
A new, simple method for characterization of fiber Bragg gratings is proposed. The group delay of the grating is obtained from measurement of the spectral reflectivity response of a grating that is interfering with a bare-fiber end reflection.
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Skaar J, Engan HE. Phase reconstruction from reflectivity in fiber Bragg gratings. Opt Lett 1999; 24:136-138. [PMID: 18071432 DOI: 10.1364/ol.24.000136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
It is shown that a recently proposed phase-retrieval technique for Bragg gratings [Opt. Lett. 22, 93 (1997); J. Lightwave Technol. 15, 1314 (1997)] is not well suited for gratings with imperfections. The reconstructed group delay is in many cases not a more accurate estimate than the simulated group delay of the perfect, designed grating, independently of how small the errors in the grating structure are. The error in the group delay may be especially large near the zeros in the reflection spectrum.
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Skaar J, Sahlgren B, Fonjallaz PY, Storøy H, Stubbe R. High-reflectivity fiber-optic bandpass filter designed by use of the iterative solution to the Gel'fand-Levitan-Marchenko equations. Opt Lett 1998; 23:933-935. [PMID: 18087388 DOI: 10.1364/ol.23.000933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A fiber Bragg grating bandpass filter has been investigated. The profile of the 3.1-cm-long grating was synthesized for high reflectivity and low dispersion by use of the iterative solution to the Gel'fand-Levitan-Marchenko equations. A grating designed according to this synthesis was written into a boron-codoped germanosilica fiber. The measured spectral response was in good agreement with simulations. The achieved in-band reflection was 97%, and the passband ripple was only 0.06 dB.
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Skaar J. Public health emphasis needed in health care reform. S D Nurse 1994; 36:8. [PMID: 7973735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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