Готові списки джерел за темами / LIGHT ENHANCEMENT

Добірка наукової літератури з теми "LIGHT ENHANCEMENT"

Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "LIGHT ENHANCEMENT"

1

Ono, Naoki, and Kiichi Urahama. "Enhancement of Images Degraded by Hazy Light Scattering and Attenuation." Journal of the Institute of Industrial Applications Engineers 7, no. 2 (April 25, 2019): 38–41. http://dx.doi.org/10.12792/jiiae.7.38.

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2

SANTHIYA, S., S. NANDHINI, M. MOGANA PRIYA, and K. SELVA BHUVANESWARI. "LOW-LIGHT IMAGE ENHANCEMENT USING INVERTED ATMOSPHERIC LIGHT." i-manager’s Journal on Software Engineering 15, no. 4 (2021): 8. http://dx.doi.org/10.26634/jse.15.4.18142.

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3

Zhmakin, A. I. "Enhancement of light extraction from light emitting diodes." Physics Reports 498, no. 4-5 (February 2011): 189–241. http://dx.doi.org/10.1016/j.physrep.2010.11.001.

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4

Hao, Shijie, Xu Han, Yanrong Guo, and Meng Wang. "Decoupled Low-Light Image Enhancement." ACM Transactions on Multimedia Computing, Communications, and Applications 18, no. 4 (November 30, 2022): 1–19. http://dx.doi.org/10.1145/3498341.

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The visual quality of photographs taken under imperfect lightness conditions can be degenerated by multiple factors, e.g., low lightness, imaging noise, color distortion, and so on. Current low-light image enhancement models focus on the improvement of low lightness only, or simply deal with all the degeneration factors as a whole, therefore leading to sub-optimal results. In this article, we propose to decouple the enhancement model into two sequential stages. The first stage focuses on improving the scene visibility based on a pixel-wise non-linear mapping. The second stage focuses on improving the appearance fidelity by suppressing the rest degeneration factors. The decoupled model facilitates the enhancement in two aspects. On the one hand, the whole low-light enhancement can be divided into two easier subtasks. The first one only aims to enhance the visibility. It also helps to bridge the large intensity gap between the low-light and normal-light images. In this way, the second subtask can be described as the local appearance adjustment. On the other hand, since the parameter matrix learned from the first stage is aware of the lightness distribution and the scene structure, it can be incorporated into the second stage as the complementary information. In the experiments, our model demonstrates the state-of-the-art performance in both qualitative and quantitative comparisons, compared with other low-light image enhancement models. In addition, the ablation studies also validate the effectiveness of our model in multiple aspects, such as model structure and loss function.
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5

Hsieh, Hsin-Hsin, Jen-Loong Hwang, Chia-Yu Lin, and Jang-Hsing Hsieh. "Light Enhancement of Solar Module." Energy and Power Engineering 06, no. 14 (2014): 507–12. http://dx.doi.org/10.4236/epe.2014.614044.

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6

Sukmanowski, J., J. R. Viguié, B. Nölting, and F. X. Royer. "Light absorption enhancement by nanoparticles." Journal of Applied Physics 97, no. 10 (May 15, 2005): 104332. http://dx.doi.org/10.1063/1.1899249.

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7

Park, Seonhee, Kiyeon Kim, Soohwan Yu, and Joonki Paik. "Contrast Enhancement for Low-light Image Enhancement: A Survey." IEIE Transactions on Smart Processing & Computing 7, no. 1 (February 28, 2018): 36–48. http://dx.doi.org/10.5573/ieiespc.2018.7.1.036.

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8

KOJIMA, Seiichi, Noriaki SUETAKE, and Eiji UCHINO. "A Contrast Enhancement of Low-light Image Suppressing Over-enhancement." Japanese Journal of Ergonomics 56, Supplement (2020): 2B3–03–2B3–03. http://dx.doi.org/10.5100/jje.56.2b3-03.

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9

Gebek, Andrea, та Jorryt Matthee. "On the Variation in Stellar α-enhancements of Star-forming Galaxies in the EAGLE Simulation". Astrophysical Journal 924, № 2 (1 січня 2022): 73. http://dx.doi.org/10.3847/1538-4357/ac350b.

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Abstract The ratio of α-elements to iron in galaxies holds valuable information about the star formation history (SFH) since their enrichment occurs on different timescales. The fossil record of stars in galaxies has mostly been excavated for passive galaxies, since the light of star-forming galaxies is dominated by young stars, which have much weaker atmospheric absorption features. Here we use the largest reference cosmological simulation of the EAGLE project to investigate the origin of variations in stellar α-enhancement among star-forming galaxies at z = 0, and their impact on integrated spectra. The definition of α-enhancement in a composite stellar population is ambiguous. We elucidate two definitions—termed “mean” and “galactic” α-enhancement—in more detail. While a star-forming galaxy has a high “mean” α-enhancement when its stars formed rapidly, a galaxy with a large “galactic” α-enhancement generally had a delayed SFH. We find that absorption-line strengths of Mg and Fe correlate with variations in α-enhancement. These correlations are strongest for the “galactic” α-enhancement. However, we show that these are mostly caused by other effects that are cross-correlated with α-enhancement, such as variations in the light-weighted age. This severely complicates the retrieval of α-enhancements in star-forming galaxies. The ambiguity is not severe for passive galaxies, and we confirm that spectral variations in these galaxies are caused by measurable variations in α-enhancements. We suggest that this more complex coupling between α-enhancement and SFHs can guide the interpretation of new observations of star-forming galaxies.
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10

Sharma, Sahil, Abhisek Sinha, Vandana Sharma, and Ram gopal Sharma. "Field Enhancement in Nanoparticles Due to IR Vortex Beams." ECS Transactions 107, no. 1 (April 24, 2022): 1255–69. http://dx.doi.org/10.1149/10701.1255ecst.

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In this report we present our study of interaction of light carrying OAM (Orbital Angular Momentum) with nanometric metallic discs. Plasmonic effects are known to give rise to high local field enhancement factors in gold nano-discs. These high intensities near fields have found use in a wide variety of imaging and detection applications. The local field enhancement factor near the surface of the disc was calculated numerically using finite element method using the Comsol package. We report a significant increase in the local field enhancement factor for light beams carrying OAM compared to Gaussian beams which are attributed to Localised Surface Plasmon Resonances (LSPR). Such large enhancements in the field can be immensely useful in the field on near field microscopy and electron generation.
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Дисертації з теми "LIGHT ENHANCEMENT"

1

Lawrence, Nathaniel. "Engineering photonic and plasmonic light emission enhancement." Thesis, Boston University, 2013. https://hdl.handle.net/2144/11114.

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Thesis (Ph.D.)--Boston University
Semiconductor photonic devices are a rapidly maturing technology which currently occupy multi-billion dollar markets in the areas of LED lighting and optical data communication. LEDs currently demonstrate the highest luminous efficiency of any light source for general lighting. Long-haul optical data communication currently forms the backbone of the global communication network. Proper design of light management is required for photonic devices, which can increase the overall efficiency or add new device functionality. In this thesis, novel methods for the control of light propagation and confinement are developed for the use in integrated photonic devices. The first part of this work focuses on the engineering of field confinement within deep subwavelength plasmonic resonators for the enhancement of light-matter interaction. In this section, plasmonic ring nanocavities are shown to form gap plasmon modes confined to the dielectric region between two metal layers. The scattering properties, near-field enhancement and photonic density of states of nanocavity devices are studied using analytic theory and 3D finite difference time domain simulations. Plasmonic ring nanocavities are fabricated and characterized using photoluminescence intensity and decay rate measurements. A 25 times increase in the radiative decay rate of Er:Si02 is demonstrated in nanocavities where light is confined to volumes as small as 0.01(λ/n)^3 . The potential to achieve lasing, due to the enhancement of stimulated emission rate in ring nanocavities, is studied as a route to Si-compatible plasmon-enhanced nanolasers. The second part of this work focuses on the manipulation of light generated in planar semiconductor devices using arrays of dielectric nanopillars. In particular, aperiodic arrays of nanopillars are engineered for omnidirectional light extraction enhancement. Arrays of Er:SiNx nanopillars are fabricated and a ten times increase in light extraction is experimentally demonstrated, while simultaneously controlling far-field radiation patterns in ways not possible with periodic arrays. Additionally, analytical scalar diffraction theory is used to study light propagation from Vogel spiral arrays and demonstrate generation of OAM. Using phase shifting interferometry, the presence of OAM is experimentally verified. The use of Vogel spirals presents a new method for the generation of OAM with applications for secure optical communications.
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2

Yang, Qingyi. "Broadband light absorption enhancement in organic solar cells." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/54.

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The aim of this thesis was to undertake a comprehensive research to study the broadband light absorption enhancement in organic solar cells (OSCs) with different nano-structures, thereby improving short-circuit current density and efficiency. Absorption enhancement in OSCs having different photonic structures, compared to the control planar cell configuration, was analyzed and studied using the optical admittance analysis and finite-difference time-domain (FDTD) method. After a brief overview of the latest progresses made in OSCs, the basic optical principles of light scattering, surface plasmon polaritons (SPPs), localized surface plasmon resonance (LSPR), diffraction effect and waveguide mode, that had been employed for light trapping in OSCs, are discussed. Optical admittance analysis reveals that light absorption in inverted OSCs, based on polymer blend layer of P3HT:PCBM, is always greater than the conventional geometry OSCs fabricated using an ITO/PEDOT:PSS anode. The inverted bulk heterojunction OSCs, made with a pair of an ultrathin Al-modified ITO front cathode and a bi-layer MoO3/Ag anode, exhibited a superior power conversion efficiency (PCE) of 4.16%, which is about 13% more efficient than a control normal OSC. It is shown that the reverse configuration allows improving charge collection at cathode/blend interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test. Light absorption enhancement in ZnPc:C60-based OSCs, made with substrates having different structures, for example, surface-modified Ag nanoparticles and 1-D photonic structures, was analyzed. The effect of an ultra-thin plasma-polymerized fluorocarbon film (CFx)-modified Ag nanoparticles ii (NPs)/ITO anode on the performance of OSCs was optimized through theoretical simulation and experimental optimization. This work yielded a promising PCE of 3.5 ± 0.1%, notably higher than that with a bare ITO anode (2.7±0.1%). The work was extended to study the performance of OSCs made with CFx-modified Ag NPs/ITO/polyethylene terephthalate (PET) substrate. The resulting flexible OSCs had a relatively high PCE of 3.1±0.1%, comparable to that of structurally identical OSCs fabricated on ITO-coated glass substrate (PCE of 3.5±0.1%). The distribution of the sizes of the Ag NPs, formed by the thermal evaporation, was over the range from 2.0 nm to 10 nm. The results reveal that the localized surface plasmon resonance, contributing to the broadband light absorption enhancement in the organic photoactive layer, was strongly influenced by the size of Ag NPs and the dielectric constant of the surrounding medium. A new OSC structure incorporating a transparent PMMA/ITO double layer grating electrode was also developed. 1-D PMMA/ITO double layer grating, fabricated using nano-imprinting and low processing temperature ITO sputtering method, has a period of 500 nm. Light absorption in grating OSCs under TM, TE and TM/TE hybrid polarizations was calculated using FDTD simulation in the wavelength range from 400 nm to 800 nm. We profiled the electric field distribution and analyzed the structural requirement for confining the waveguide modes in the organic photoactive layer. The effects of the periodicity and the pitch size on light scattering, simultaneous excitation of horizontally propagating SPPs, LSPR and the waveguide modes for light harvesting in grating OSCs were analyzed. The efficiency enhancement in the grating OSCs (PCE 3.29%) over the planar control device (PCE 2.86%) is primarily due to the increase in the short-circuit current density from 11.93 mA/cm2 to 13.57 mA/cm2 (13.7% enhancement). The theoretical results agree with the experimental findings in showing that the improved performance in grating OSCs is attributed to the absorption enhancement in the active layer
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3

Hart, Matthew. "Optical characterization and enhancement of liquid-crystal spatial light modulators." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/14011.

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Liquid crystal spatial light modulators (LC SLMs) are used in a variety of applications including information display, optical computing and information processing, holographic data storage and adaptive optics. Only in displays, however, have they achieved widespread use outside the research laboratory. Part of the reason for this is the comparatively low optical quality of most LC modulators currently available. This thesis explores methods which can be used to characterize and enhance these devices: particularly those intended for use in non-display applications where output wavefront quality, and spatial device uniformity, can be critical. One key device parameter to be determined is the value and uniformity of the cell gap which defines the thickness of the LC layer. Surface profile measurement is also important for assessing, for example, the optical quality of reflective VLSI pixel arrays. In addition, characterization of LC response for a given input drive signal is often needed to allow prediction of SLM performance in a particular optical system. The development of methods for accurate determination of LC cell gaps is described. Broadband and multiple-wavelength interferometry are used to provide the large unambiguous measurement range necessary for absolute measurement of these micron-scale distances. One method is based on the technique of phase-shifting interferometry and allows the spatial variations to be mapped relatively quickly from a small number of interferograms acquired at different wavelengths. Techniques for reducing systematic measurement errors are discussed and demonstrated both through numerical simulation and experiment. A novel white-light interferometer configuration is also described, based on spectral analysis of white light interferograms using an imaging stationary Fourier transform spectrometer. It is shown that this configuration permits real-time visualization of spatial variations in interferometer path difference, as well as giving unambiguous depth measurements with nanometre resolution. Applications to surface profiling and to cell gap determination are discussed and experimental surface measurement results given.
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4

Gandhi, Keyur. "Enhancement of light coupling to solar cells using plasmonic structures." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/808845/.

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Photovoltaic technologies are likely to become one of the world’s major renewable energy generators in the future provided they are able to meet the increasing world energy demands at a significantly lower generation cost compared to conventional non-renewable energy sources. Photovoltaic systems based on 1st generation mono or poly crystalline silicon wafers have already been commercially successful over the past two decades. As the technology further develops however, it faces fundamental limits to further reduce cost which are primarily due to processing of silicon wafers. Hence, a 2nd generation of “thin film” photovoltaic systems, such as amorphous and poly silicon, CdTe and CIGS, which use cheap materials and inexpensive manufacturing processes with relatively high power conversion efficiency, have been developed. In order to commercialise the 2nd generation technology successfully, the efficiency of the thin film photovoltaic panels needs to increase to compete with the 1st generation silicon photovoltaics. Plasmonic structures provide a route to increase the efficiency of 2nd generation thin film photovoltaic devices. With the unique properties of plasmonic structures, such as ability to guide and trap light at nanometre dimensions, light absorption in the photoactive layer of thin film photovoltaic device can be increased resulting in improved device performance. In this research, plasmonic nanoparticles are utilised as an anti-reflection coating on the front side of the PV, coupling light into the active PV layer, and as scattering centres at the back reflector, increasing the path length of the light through the photoactive layer. The optical and electrical effects of the plasmonic structures are modelled simultaneously using a commercial technology computer aided design (TCAD) simulation package to understand and optimise the plasmonic effects on the performance of the 2nd generation thin film amorphous silicon, and 3rd generation organic, photovoltaic devices. The thesis describes the first ever dedicated optoelectronic model to simultaneously simulate optical and electrical properties of plasmonic thin film photovoltaics devices in collaboration with the TCAD software developer Silvaco Inc. The model demonstrates a maximum 12% relative increase in the power conversion efficiency of plasmon enhanced n-i-p configured amorphous silicon thin film photovoltaic devices. This remarkable increase in the performance is due to the light trapping in the photoactive layer of the thin film amorphous silicon photovoltaic devices, which results in improvements in the both the optical and electrical properties. Experimental work was also carried out to observe the plasmonic effects of the metal nanoparticles on the performance of 3rd generation organic photovoltaic devices which were subsequently modelled using the simulation package. A 4% relative increase in the efficiency was achieved using gold nanoparticles. A plasmonic organic photovoltaic device model and material library for the commercial organic semiconductor P3HT:PCBM, has also been developed and benchmarked experimentally. The model has assisted in the understanding of the effect of the plasmonic gold nanoparticles on the increased performance, as well as degradation effects due to the incorporation of silver nanoparticles.
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5

Karna, Sanjay K. "Enhancement of Light Emission from Metal Nanoparticles Embedded Graphene Oxide." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849637/.

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A fully oxidized state of graphene behaves as a pure insulating while a pristine graphene behaves as a pure conducting. The in-between oxide state in graphene which is the controlled state of oxide behaves as a semiconducting. This is the key condition for tuning optical band gap for the better light emitting property. The controlling method of oxide in graphene structure is known as reduction which is the mixed state of sp2 and sp3 hybrid state in graphene structure. sp2 hybridized domains correspond to pure carbon-carbon bond i.e. pristine graphene while sp3 hybridized domains correspond to the oxide bond with carbon i.e. defect in graphene structure. This is the uniqueness of the graphene-base material. Graphene is a gapless material i.e. having no bandgap energy and this property prevents it from switching device applications and also from the optoelectronic devices applications. The main challenge for this material is to tune as a semiconducting which can open the optical characteristics and emit light of desired color. There may be several possibilities for the modification of graphene-base material that can tune a band gap. One way is to find semiconducting property by doping the defects into pristine graphene structure. Other way is oxides functional groups in graphene structure behaves as defects. The physical properties of graphene depend on the amount of oxides present in graphene structure. So if there are more oxides in graphene structure then this material behaves as a insulating. By any means if it can be reduced then oxides amount to achieve specific proportion of sp2 and sp3 that can emit light of desired color. Further, after achieving light emission from graphene base material, there is more possibility for the study of non-linear optical property. In this work, plasmonic effect in graphene oxide has been focused. Mainly there are two kinds of plasmon effects have been studied, one is long range (surface) and short range (localized) plasmon. For long range plasmon gold thin film was deposited on partially reduced graphene oxide and for short range plasmon silver nanoparticles have used. Results show that there are 10-fold enhancement in light emission from partial graphene oxide coated with gold thin film while 4-fold enhancement from reduced graphene oxide solution with silver nanoparticles. Chemical method and photocatalytic method have been employed for the reduction of graphene oxide for the study of surface plasmon and localized plasmon. For the characterization UV-Vis spectrometer for absorption, spectrofluorophotometer for fluorescent emission, Raman spectrometer for material characterization, photoluminescence and time resolved photoluminescence have been utilized. Silver and gold nanoparticles are spherical of average size of 80 nm and 40 nm have been used as plasmons.
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6

Karna, Sanjay K. "Enhancement of Light Emission from Metal Nanoparticles Embedded Graphene Oxide." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc849637/.

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Анотація:
A fully oxidized state of graphene behaves as a pure insulating while a pristine graphene behaves as a pure conducting. The in-between oxide state in graphene which is the controlled state of oxide behaves as a semiconducting. This is the key condition for tuning optical band gap for the better light emitting property. The controlling method of oxide in graphene structure is known as reduction which is the mixed state of sp2 and sp3 hybrid state in graphene structure. sp2 hybridized domains correspond to pure carbon-carbon bond i.e. pristine graphene while sp3 hybridized domains correspond to the oxide bond with carbon i.e. defect in graphene structure. This is the uniqueness of the graphene-base material. Graphene is a gapless material i.e. having no bandgap energy and this property prevents it from switching device applications and also from the optoelectronic devices applications. The main challenge for this material is to tune as a semiconducting which can open the optical characteristics and emit light of desired color. There may be several possibilities for the modification of graphene-base material that can tune a band gap. One way is to find semiconducting property by doping the defects into pristine graphene structure. Other way is oxides functional groups in graphene structure behaves as defects. The physical properties of graphene depend on the amount of oxides present in graphene structure. So if there are more oxides in graphene structure then this material behaves as a insulating. By any means if it can be reduced then oxides amount to achieve specific proportion of sp2 and sp3 that can emit light of desired color. Further, after achieving light emission from graphene base material, there is more possibility for the study of non-linear optical property. In this work, plasmonic effect in graphene oxide has been focused. Mainly there are two kinds of plasmon effects have been studied, one is long range (surface) and short range (localized) plasmon. For long range plasmon gold thin film was deposited on partially reduced graphene oxide and for short range plasmon silver nanoparticles have used. Results show that there are 10-fold enhancement in light emission from partial graphene oxide coated with gold thin film while 4-fold enhancement from reduced graphene oxide solution with silver nanoparticles. Chemical method and photocatalytic method have been employed for the reduction of graphene oxide for the study of surface plasmon and localized plasmon. For the characterization UV-Vis spectrometer for absorption, spectrofluorophotometer for fluorescent emission, Raman spectrometer for material characterization, photoluminescence and time resolved photoluminescence have been utilized. Silver and gold nanoparticles are spherical of average size of 80 nm and 40 nm have been used as plasmons.
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7

Ellaboudy, Ashton. "ENHANCEMENT OF LIGHT ABSORPTION EFFICIENCY Of SOLAR CELL USING DUAL." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/672.

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In this research we study the effect of adding a single diffraction grating on top of a solar cell. We simulated the square diffraction grating, as well as triangular diffraction grating. The single square grating showed more favorable results, achieved 330% power improvement compared to 270% power improvement in the single triangular grating case. We simulated a triangle/triangle (top-bottom) and triangular/rectangular (top-bottom) grating cases. The Triangular grating achieved higher light absorption compared to rectangular grating. The best top grating was around 200nm grating period. We realized solar cell efficiency improvement about 42.4% for the triangular rectangular (top-bottom) grating. We studied the light transmitted power in a silicon solar cell using double diffraction triangular nano-grating. We simulated the solar cell behavior as it absorbs sunlight through its structure in various cases, results showed 270% increase of the weighted transmitted power when the top grating period (At) varies from 300nm to 800nm, and the bottom grating period (Ab) is at 500nm. We finally studied the effect of changing the location of the diffraction gratings with respect to the solar cell. We were able to increase the light efficiency by 120%. The study showed that the power absorbed by the solar cell is not sensitive to the grating location.
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8

West, Charles Stanley. "Backscattering enhancement from plasmon polaritons on rough metal surfaces." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/29914.

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9

Dalasari, Venkata Gopi Krishna, and Sri Krishna Jayanty. "Low Light Video Enhancement along with Objective and Subjective Quality Assessment." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13500.

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Enhancing low light videos has been quite a challenge over the years. A video taken in low light always has the issues of low dynamic range and high noise. This master thesis presents contribution within the field of low light video enhancement. Three models are proposed with different tone mapping algorithms for extremely low light low quality video enhancement. For temporal noise removal, a motion compensated kalman structure is presented. Dynamic range of the low light video is stretched using three different methods. In Model 1, dynamic range is increased by adjustment of RGB histograms using gamma correction with a modified version of adaptive clipping thresholds. In Model 2, a shape preserving dynamic range stretch of the RGB histogram is applied using SMQT. In Model 3, contrast enhancement is done using CLAHE. In the final stage, the residual noise is removed using an efficient NLM. The performance of the models are compared on various Objective VQA metrics like NIQE, GCF and SSIM. To evaluate the actual performance of the models subjective tests are conducted, due to the large number of applications that target humans as the end user of the video.The performance of the three models are compared for a total of ten real time input videos taken in extremely low light environment. A total of 25 human observers subjectively evaluated the performance of the three models based on the parameters: contrast, visibility, visually pleasing, amount of noise and overall quality. A detailed statistical evaluation of the relative performance of the three models is also provided.
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10

Payne, David N. R. "The characterization and enhancement of light scattering for thin solar cells." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/369416/.

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Photovoltaic (PV) power is one of the most promising technologies for worldwide clean and sustainable energy production and as the technology begins to enter the mainstream the requirement for efficient use of materials becomes increasingly important. However, reducing material thickness typically lowers optical absorption, leading to lower cell efficiency. One proven method for enhancing absorption in a thin device is by texturing interfaces, typically achieved in the top transparent conducting oxide (TCO) of a thin-film design. This works by scattering transmitted light and therefore increasing its effective optical path length within the absorber layer. However, introducing rough surfaces to a PV device can lead to fabrication issues and also increases surface recombination which is detrimental to the electrical characteristics of the end device. In recent years, possible alternatives to reliance on random texturing have been found through the use of optimized diffraction gratings and the plasmonic effects of metal nanoparticles. In this work, comprehensive optical characterization has been carried out on a range of samples using traditional and novel techniques. In particular, a custom built wavelength and angle resolved scattering (WARS) measurement system has been developed and used to determine key characteristics that would remain undetected by conventional measurements. The investigation of several commercial and experimental TCO films has been carried out and clear links between topography and optical characteristics have been determined. These textured surfaces have also been modelled using finite difference time domain (FDTD) simulations which have shown good agreement with measurement results. This has allowed for further investigation of the effects of TCO topography through simulation which has revealed that scattering is best enhanced by increasing the aspect ratio of the texture rather than the overall scale. Periodic arrays of silver nanoparticles incorporated into a thin-film solar cell back-reflector design have also been extensively characterized and modelled and shown to provide scattering through both diffraction and plasmonic mechanisms, leading to an increase in useful absorption by up to 140% in comparison to a planar device.
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Книги з теми "LIGHT ENHANCEMENT"

1

David, Shotton, ed. Electronic light microscopy: The principles and practice of video-enhanced contrast, digital intensified fluorescence, and confocal scanning light microscopy. New York: Wiley-Liss, 1993.

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2

Mei-Li, Hsieh, and National Institute of Standards and Technology (U.S.), eds. Performance enhancement of a joint transform correlator using the directionality of a spatial light modulator. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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3

Britain, Great. Docklands Light Railway (Capacity Enhancement) Order 2005. Stationery Office, The, 2005.

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4

Britain, Great. Docklands Light Railway (Capacity Enhancement and 2012 Games Preparation) Order 2007. Stationery Office, The, 2007.

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5

Red Light Therapy for Dummies: Natural Healing Light Medicine, Treatment, Anti-Aging, Fat Loss, Muscle Gain, Performance Enhancement, and Brain Optimization. Independently Published, 2021.

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Publishing, M. Roy. Red Light Therapy Beginner's Record Book: Red and near-Infrared Light Therapy Record Book for Performance Enhancement, Fat Loss, Muscle Gain and Brain Optimization. Independently Published, 2022.

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7

Warmbier, Adriana. Idea of Excellence and Human Enhancement: Reconsidering the Debate on Transhumanism in Light of Moral Philosophy and Science. Lang GmbH, Internationaler Verlag der Wissenschaften, Peter, 2018.

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Warmbier, Adriana. Idea of Excellence and Human Enhancement: Reconsidering the Debate on Transhumanism in Light of Moral Philosophy and Science. Lang GmbH, Internationaler Verlag der Wissenschaften, Peter, 2018.

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Warmbier, Adriana. Idea of Excellence and Human Enhancement: Reconsidering the Debate on Transhumanism in Light of Moral Philosophy and Science. Lang GmbH, Internationaler Verlag der Wissenschaften, Peter, 2018.

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Warmbier, Adriana. Idea of Excellence and Human Enhancement: Reconsidering the Debate on Transhumanism in Light of Moral Philosophy and Science. Lang GmbH, Internationaler Verlag der Wissenschaften, Peter, 2018.

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Частини книг з теми "LIGHT ENHANCEMENT"

1

Zigman, S. "Image Enhancement by Short Wavelength Light Filtration." In Biologic Effects of Light, edited by Michael F. Holick and Albert M. Kligman, 263–68. Berlin, Boston: De Gruyter, 1992. http://dx.doi.org/10.1515/9783110856156-033.

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Wang, Haodian, Yang Wang, Yang Cao, and Zheng-Jun Zha. "Fusion-Based Low-Light Image Enhancement." In MultiMedia Modeling, 121–33. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27077-2_10.

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Zherdev, Alexey, Alexey Svoevskiy, Vitaliy Pingin, Valentin Shakhmatov, and Yuriy Shtefanyuk. "Environmental Enhancement of Potroom Processes by Using a Machine Vision System." In Light Metals 2022, 979–84. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92529-1_127.

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Vogt, Carson, Geng Lyu, and Kartic Subr. "Lightless Fields: Enhancement and Denoising of Light-Deficient Light Fields." In Advances in Visual Computing, 383–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-64556-4_30.

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Malm, Henrik, Magnus Oskarsson, and Eric Warrant. "Biologically inspired enhancement of dim light video." In Frontiers in Sensing, 71–85. Vienna: Springer Vienna, 2012. http://dx.doi.org/10.1007/978-3-211-99749-9_5.

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Fotiadou, Konstantina, Grigorios Tsagkatakis, and Panagiotis Tsakalides. "Low Light Image Enhancement via Sparse Representations." In Lecture Notes in Computer Science, 84–93. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11758-4_10.

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Kavya, Avvaru Greeshma, Uruguti Aparna, and Pallikonda Sarah Suhasini. "Enhancement of Low-Light Images Using CNN." In Emerging Research in Computing, Information, Communication and Applications, 1–9. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1342-5_1.

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Broglia, Marinella. "NADPH Fluorescence in Intact Chloroplasts: Detection, Kinetics and Enhancement Effect." In Photosynthesis: from Light to Biosphere, 4407–10. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_1036.

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Song, Juan, Liang Zhang, Peiyi Shen, Xilu Peng, and Guangming Zhu. "Single Low-Light Image Enhancement Using Luminance Map." In Communications in Computer and Information Science, 101–10. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-3005-5_9.

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Cui, Wei, Chen Li, Can Zhang, and Xu Zhang. "Restoration and Enhancement of Underwater Light Field Image." In Lecture Notes in Electrical Engineering, 93–105. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5768-7_9.

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Тези доповідей конференцій з теми "LIGHT ENHANCEMENT"

1

Preußler, Stefan, Kambiz Jamshidi, Andrzej Wiatrek, and Thomas Schneider. "Light Storage Enhancement by Reducing the Brillouin Bandwidth." In Slow and Fast Light. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/sl.2011.slwa4.

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Chao, Tien-Hsin, and Hua-Kuang Liu. "Real-Time Optical Edge Enhancement Using a Hughes Liquid Crystal Light Valve." In Spatial Light Modulators and Applications. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/slma.1988.wb4.

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Edge enhancement is one of the most important preprocessing techniques utilized in optical pattern recognition. In an optical correlator, cross-correlations among similar input objects can be greatly reduced by using the edge enhancement technique. Traditionally, optical edge enhancement is obtained by high-pass filtering at the Fourier plane. However, the system SNR is generally lowered by this filtering process. Recently, two differentiating spatial light modulators, specifically designed to generate edge-enhanced output, have been reported. Casasent et al. have demonstrated real-time edge enhancement using a Priz light modulator [1]. The Priz light modulator is a transverse modification of the Pockel’s Read-out Optical Modulator (PROM) with a [111] BSO crystal cut. Armitage and Thackara have designed a BSO photo-addressed nematic liquid crystal differentiating spatial light modulator [2, 3]. A layer of liquid crystal is tuned in a transverse configuration (i.e. the electro-optic response is optimized for Ex and Ey rather than Ez) to achieve the edge-enhancement. The BSO crystal is used as a photo-addressing medium. This SLM is functionally optimized as an edge-enhancing SLM.
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Chin, Sanghoon, and Luc Thévenaz. "Enhancement of Brillouin slow-light in optical fibers through optical pulse shaping." In Slow and Fast Light. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/sl.2008.jmb10.

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Ezquerro, José Miguel, Sonia Melle, Oscar G. Calderón, F. Carreño, and M. A. Antón. "Fractional Advancement Enhancement in Erbium-Doped Fiber Amplifiers by Bi-Directional Pumping." In Slow and Fast Light. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/sl.2008.jmb16.

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Rosenberger, A. T., Elijah Dale, D. Ganta, and Razvan-Ionut Stoian. "Optical Control of the Localized-Surface-Plasmon-Resonance Enhancement of Evanescent Coupling." In Slow and Fast Light. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/sl.2009.swa2.

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Shi, Zhimin, and Robert W. Boyd. "Enhancement of the Spectral Performance of Interferometers Using Slow Light Under Practical Conditions." In Slow and Fast Light. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/sl.2008.swa3.

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Koshiba, Yuya, Shogo Ota, Ryosuke Morita, Kazuyuki Sakaue, Masakazu Washio, Takeshi Higashiguchi, and Junji Urakawa. "Enhancement of Laser-Compton X-ray by Crab Crossing." In Compact EUV & X-ray Light Sources. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/euvxray.2018.jt5a.5.

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Koshiba, Yuya, Ryosuke Morita, Koki Yamashita, Masakazu Washio, Kazuyuki Sakaue, Takeshi Higashiguchi, and Junji Urakawa. "Luminosity Enhancement in Laser-Compton Scattering by Crab Crossing." In Compact EUV & X-ray Light Sources. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/euvxray.2020.jm3a.4.

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Bescos, J., and J. Santamaria. "White Light Image Enhancement And Restoration." In Symposium Optika '84, edited by Gabor Lupkovics and Andras Podmaniczky. SPIE, 1985. http://dx.doi.org/10.1117/12.942453.

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Rana, Deepanshu, Kanishk Jayant Lal, and Anil Singh Parihar. "Edge Guided Low-Light Image Enhancement." In 2021 5th International Conference on Intelligent Computing and Control Systems (ICICCS). IEEE, 2021. http://dx.doi.org/10.1109/iciccs51141.2021.9432150.

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Звіти організацій з теми "LIGHT ENHANCEMENT"

1

Smilgys, Russell V., Neri Shatz, and John Bortz. Novel Coatings for Enhancement of Light-Emitting Diodes (LEDs). Fort Belvoir, VA: Defense Technical Information Center, October 2006. http://dx.doi.org/10.21236/ada458518.

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Alger, T. W., R. G. Finucane, J. P. Hall, B. M. Penetrante, and T. M. Uphaus. Direct Energy Exchange Enhancement in Distributed Injection Light Gas Launchers. Office of Scientific and Technical Information (OSTI), April 2000. http://dx.doi.org/10.2172/15013536.

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James Perkins, Matthew Stevenson, Gagan Mahan, Seth Coe-Sullivan, and Peter Kazlas. Quantum Dot Light Enhancement Substrate for OLED Solid-State Lighting. Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1025537.

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Tansu, Nelson, Volkmar Dierolf, Gensheng Huang, Samson Penn, Hongping Zhao, Guangyu Liu, Xiaohang Li, and Jonathan Poplawsky. Enhancement of Radiative Efficiency with Staggered InGaN Quantum Well Light Emitting Diodes. Office of Scientific and Technical Information (OSTI), July 2011. http://dx.doi.org/10.2172/1110811.

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Prescott, Steven R., John M. Biersdorf, and Ramprasad Sampath. Industry Fire Modeling Enhancement Tools and Methods. Light Water Reactor Sustainability Program report. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1546734.

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Halevy, Orna, Zipora Yablonka-Reuveni, and Israel Rozenboim. Enhancement of meat production by monochromatic light stimuli during embryogenesis: effect on muscle development and post-hatch growth. United States Department of Agriculture, June 2004. http://dx.doi.org/10.32747/2004.7586471.bard.

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Анотація:
The original objectives were: A. To determine the critical embryonic age for monochromatic green light stimulation. B. To follow the ontogeny of embryos exposed to monochromatic green light vs. darkness. C. To investigate the effects of monochromatic green light illumination on myoblast and fiber development in the embryo. D. To investigate the stimulatory effect of light combinations during embryo and post-hatch periods on growth and meat production. E. To evaluate the direct effect of monochromatic green light on cultured embryonic and adult myoblasts. The overall purpose of this study was to investigate the effect of monochromatic light stimuli during incubation period of broilers on muscle development and satellite cell myogenesis. Based on previous studies (Halevy et al., 1998; Rozenboim et al., 1999) that demonstrated the positive effects of green-light illumination on body and muscle growth, we hypothesized that monochromatic light illumination accelerates embryo and muscle development and subsequently enhances muscle growth and meat production. Thus, further decreases management costs. Under the cooperation of the laboratories at the Hebrew University of Jerusalem and University of Washington we have conducted the following: 1. We have established the critical stage for exposure to green monochromatic light which has the maximal effect on body and muscle growth (Objective A). We report that embryonic day 5 is optimal for starting illumination. The optimal regime of lighting that will eliminate possible heat effects was evaluated by monitoring egg core temperature at various illumination periods. We found that intermitted lighting (15 min. on; 15 min. off) is optimal to avoid heat effects. 2. We have evaluated in detail gross changes in embryo development profile associated to green light stimuli vs. darkness. In addition, we have investigated the stimulatory effect of light combinations during embryo and post-hatch periods on body and muscle growth (Objective B,D). 3. We have studied the expression profile of muscle regulatory proteins during chicken muscle cell differentiation in cultures using newly developed antibodies. This study paved the way for analyzing the expression of these proteins in our photo stimulation experiments (Objective C). 4. We have studied the pattern ofPax7 expression during myogenesis in the posthatch chicken. Experimental chick pectoralis muscles as well adult myoblast cultures were used in this study and the results led us to propose a novel model for satellite cell differentiation and renewal. 5. The effects of monochromatic green light illumination during embryogenesis have been studied. These studies focused on fetal myoblast and satellite cell proliferation and differentiation at pre- and posthatch periods and on the effects on the expression of muscle regulatory proteins which are involved in these processes. In addition, we have analyzed the effect of photo stimulation in the embryo on myofiber development at early posthatch (Objective C). 6. In follow the reviewers' comments we have not conducted Objective E. The information gathered from these studies is of utmost importance both, for understanding the molecular basis of muscle development in the posthatch chicks and for applied approach for future broiler management. Therefore, the information could be beneficial to agriculture in the short term on the one hand and to future studies on chick muscle development in the embryo and posthatch on the other hand.
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Hsieh, Mei-Li, Eung-Gi Paek, Charles L. Wilson, and Ken Y. Hsu. Performance enhancement of a joint transform correlator using the directionality of a spatial light modulator. Gaithersburg, MD: National Institute of Standards and Technology, 1998. http://dx.doi.org/10.6028/nist.ir.6272.

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Birkmire, Robert, Juejun Hu, and Kathleen Richardson. Beyond the Lambertian limit: Novel low-symmetry gratings for ultimate light trapping enhancement in next-generation photovoltaics. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1419008.

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Simmons, Mary Ann, Robert L. Johnson, Craig A. McKinstry, Steven M. Anglea, Carver S. Simmons, Susan L. Thorsten, R. Lecaire, and S. Francis. Chief Joseph Kokanee Enhancement Project -- Strobe Light Deterrent Efficacy Test and Fish Behavior Determination at Grand Coulee Dam Third Powerplant Forebay. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/15010135.

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Simmons, M. A., C. A. McKinstry, and C. S. Simmons. Chief Joseph Kokanee Enhancement Project : Strobe Light Deterrent Efficacy Test and Fish Behavior Determination at Grond Coulee Dam Third Powerplant Forebay. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/961883.

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