Search Results - "Narendran, N"

Third-order nonlinear optical responses in derivatives of phenylhydrazone by Z-scan and optical limiting studies-influence of noble metal nanoparticles by Sudheesh, P., Siji Narendran, N.K., Chandrasekharan, K.

“…•The third-order NLO responses new phenylhydrazone derivatives were studied.•Metal nanoparticles were prepared by laser ablation technique.•Metal nanoparticles…”
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Excited state absorption assisted optical limiting action of Fe decorated γ-BBO nanorods by Babeela, C., Narendran, N.K. Siji, Pannipara, Mehboobali, Al-Sehemi, Abdullah G., Sabari Girisun, T.C.

“…Excited state absorption (ESA) assisted optical limiting behavior of hydrothermally prepared Fe decorated γ-Barium Borate (BBO) with three different…”
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An Accelerated Test Method for Predicting the Useful Life of an LED Driver by Lei Han, Narendran, N.

“…This paper proposes an accelerated life-test method for LED drivers that use electrolytic capacitors at the output stage. The type of failure considered here…”
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Life of LED-based white light sources by Narendran, N., Gu, Y.

“…Even though light-emitting diodes (LEDs) may have a very long life, poorly designed LED lighting systems can experience a short life. Because heat at the…”
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Third-order nonlinear optical investigations of meso-tetrakis(2,3,5,6-tetrafluoro-N,N-dimethyl-4-anilinyl)porphyrin and its metal complexes by Siji Narendran, N.K., Soman, Rahul, Arunkumar, Chellaiah, Chandrasekharan, K.

“…[Display omitted] •We examined the third order NLO properties of a series of metallo porphyrins.•Techniques used were Z-scan and degenerate four wave…”
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Donor-acceptor substituted thiophene dyes for enhanced nonlinear optical limiting by Anandan, S., Manoharan, S., Narendran, N.K. Siji, Girisun, T.C. Sabari, Asiri, A.M.

“…Designed, synthesized and characterized here two thiophene dyes 3-(4-(diethylamino)phenyl)-2-(thiophen-2-yl)acrylonitrile (ET),…”
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The Cataract National Dataset electronic multicentre audit of 55 567 operations: risk stratification for posterior capsule rupture and vitreous loss by Narendran, N, Jaycock, P, Johnston, R L, Taylor, H, Adams, M, Tole, D M, Asaria, R H, Galloway, P, Sparrow, J M

“…Aims To identify and quantify risk factors for posterior capsule rupture or vitreous loss or both (PCR or VL or both) during cataract surgery and provide a…”
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Optical diode activity in an axially asymmetric nonlinear medium incorporated with phenothiazine and silver nanoparticles by Shiju, E., Bharat, Mishra, Siji Narendran, N.K., Narayana Rao, D., Chandrasekharan, K.

“…In order to overcome the limitations posed by electronic devices, and to fulfill the need for optical elements in integrated photonic circuits, it is crucial…”
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Pyrazines with terminal donor groups for third-order nonlinear optics: effect of graphene oxide on nonlinear absorption by Shiju, E, Siji Narendran, N K, Thomas, Sheenu, Pannipara, Mehboobali, Al-Sehemi, Abdullah G, Narayana Rao, D

“…We report nonlinear optical (NLO) investigations of few pyrazines with terminal donor groups and the influence of graphene oxide (GO) on their nonlinear…”
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Ultrafast and short pulse optical nonlinearities of meso-tetrakis-(2,3,5,6-tetrafluoro-N,N,N-trimethyl-4-aniliniumyl) porphyrin and its metal complexes by Siji Narendran, N.K., Soman, Rahul, Sankar, Pranitha, Arunkumar, Chellaiah, Chandrasekharan, K.

“…[Display omitted] •We examined the third order NLO properties of a series of metallo porphyrins by Z scan (ns and fs) and DFWM (ns).•The χ(3) values are found…”
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Solid-state lighting: failure analysis of white LEDs by Narendran, N., Gu, Y., Freyssinier, J.P., Yu, H., Deng, L.

“…Long life, on the order of 50,000–100,000 h, is one of the key features of light-emitting diodes (LEDs) that has attracted the lighting community to this…”
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Extracting phosphor-scattered photons to improve white LED efficiency by Narendran, N., Gu, Y., Freyssinier-Nova, J. P., Zhu, Y.

“…White light‐emitting diode (LED) luminous efficacy must improve significantly if LEDs are to become useful for general lighting. Phosphors commonly used in…”
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Energy and user acceptability benefits of improved illuminance uniformity in parking lot illumination by Narendran, N, Freyssinier, JP, Zhu, Y

“…This study set out to understand the benefits of improved illuminance uniformity in parking lots in terms of user perception and acceptability, as well as…”
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A flicker perception metric by Bodington, D, Bierman, A, Narendran, N

“…A metric is proposed for predicting the perception of light source flicker from a measurement of the relative light output waveform. The metric is the weighted…”
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Effect of Aromatherapy on Dental Anxiety Among Orthodontic Patients: A Randomized Controlled Trial by S, Premkumar K, Aafaque, Syed, S, Sumalatha, N, Narendran

“…Introduction: Dental anxiety is a distressing challenge faced by both the patients and the dental care provider, particularly in the Department of…”
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Reverse saturable absorption studies in polymerized indole – Effect of polymerization in the phenomenal enhancement of third order optical nonlinearity by Jayakrishnan, K., Joseph, Antony, Bhattathiripad, Jayakrishnan, Ramesan, M.T., Chandrasekharan, K., Siji Narendran, N.K.

“…[Display omitted] •Poluindole was synthesized via in-situ polymerization of indole monomer.•Polyindole displays visible band luminescence emission with…”
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Silver Nanoparticles under Nanosecond Pulsed Laser Excitation as an Intensity Sensitive Saturable Absorption to Reverse Saturable Absorption Switching Material by Shiju, Edappadikkunnummal, Sharafudeen, Kaniyarakkal, Remya, T. M., Siji Narendran, N. K., Sudheesh, Palengara, Sadasivan Nair, Vijayakumar

“…Optical nonlinearity involved switching draws an important consideration in nonlinear optical studies. Based on that, we explored nonlinear absorption…”
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A randomized clinical trial comparing fixed vs pro-re-nata dosing of Ozurdex in refractory diabetic macular oedema (OZDRY study) by Ramu, J, Yang, Y, Menon, G, Bailey, C, Narendran, N, Bunce, C, Quartilho, A, Prevost, A T, Hykin, P, Sivaprasad, S

“…Objective To compare the clinical effectiveness and safety of 5-monthly fixed dosing vs pro-re-nata (PRN) Ozurdex treatment in patients with refractory…”
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Enhanced nonlinear absorption and efficient power limiting action of Au/Ag@ graphite core-shell nanostructure synthesized by laser ablation by E, Shiju, N K, Siji Narendran, D, Narayana Rao, K, Chandrasekharan

“…Abstract Here we report a drastic enhancement of nonlinear absorption behaviour and exceptional optical limiting action of two core-shell systems (Au@graphite…”
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Is it necessary to use three mandatory loading doses when commencing therapy for neovascular age-related macular degeneration using bevacizumab? (BeMOc Trial) by Menon, G, Chandran, M, Sivaprasad, S, Chavan, R, Narendran, N, Yang, Y

“…Purpose To determine whether a Pro Re Nata (PRN) regimen with three initial mandatory loading doses results in better functional and anatomical outcome…”
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