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Showing 1 to 20 of 64 for “"SPAD"”.

  1. Photon-efficient computational imaging with single-photon avalanche diode (SPAD) arrays

    Rumbley, Sarah (Sarah E.)Massachusetts Institute of Technology2015

    Single-photon avalanche diodes (SPADs) are highly sensitive photodetectors that enable LIDAR imaging at extremely low photon flux levels. While conventional image formation methods require hundreds or thousands of photon detections per pixel to suppress noise, a recent computational approach …

    mit Repository record

  2. RO-Based TDC Design with Configurable Resolution and Power for SPAD-Based TCSPC LiDAR Applications

    Arvani, Foad2022

    Single-photon avalanche diodes (SPAD) are used to measure time-of-flight (ToF) using CMOS time-to-digital Converters (TDCs) for compact, low-cost, and highly integrated three-dimensional (3D) sensing. The TDC specifications are critical determinants of the system's range, resolution, and accuracy. …

    toronto-retro Repository record

  3. Transmission Capacity Improvement for Single Photon Avalanche Diode-based Optical Communication Using PAM Modulation

    Meng, XiaodaoUniversity of Cambridge2019

    … due to the use of single photon avalanche diode (SPAD) optical receivers. Currently, for non-optically amplified optical communication links that use intensity modulation with direct detection, the highest optical sensitivity is achieved using avalanche photodiodes. However, the excess noise …

    cambridge Repository record

  4. Utilizacion del clorofilometro SPAD-502 para diagnosticar la deficiencia del nitrogeno en sorgo (Sorghum bicolor L. Moench) bajo distintas dosis de nitrogeno San Ramon Matagalpa

    Martinez Garcia, Lenin Pantaleón, Ocón Jarquin, Pedro PabloUniversidad Nacional Agraria, UNA2008

    … trabajo fue evaluar el uso del clorofilometro (SPAD - 502) y diagnosticar la deficiencia del nitrógeno en el cultivo de sorgo ( Sorghum bicolor L. Moench.), en la época de postrera (2005 – 2006), en el Municip io de San Ramón, Matagalpa. Se estudió una línea (ICVLM 92 522), del programa …

    una Repository record

  5. Conception de matrices de diodes avalanche à photon unique sur circuits intégrés CMOS 3D

    Bérubé, Benoît-LouisUniversité de Sherbrooke2014

    … photon unique (Single photon avalanche diode, ou SPAD) suscitent beaucoup d’intérêt depuis quelques années pour ses performances en temps et sa grande photosensibilité. Les SPAD sont des photodiodes avalanche opérées au-dessus de la tension de claquage et un photoporteur atteignant la région de …

    sherbrooke Repository record

  6. Real-Time Nitrogen Detection System of Corn Crop Using a Multi -Spectral Imaging Sensor

    Kim, YunseopUniversity of Illinois at Urbana-Champaign2015

    … of crop response that correlated with plant SPAD measurements (-0.93 for G channel and -0.88 for R channel). The system had smaller measurement variation than the SPAD meter with a standard deviation of 0.13 in MSIS measurements whereas 0.26 in SPAD measurements. The MSIS-based supplemental N …

    uiuc Repository record

  7. Development of a simulation environment for the analysis and the optimal design of fluorescence detectors based on single photon avalanche diodes

    Repich, MarynaUniversità degli studi di Trento2010

    … The features of single-photon avalanche diodes (SPAD) make these optical detectors a good alternative to conventional photomultiplier tubes and micro-channel plates. CMOS technology allows cointegration of a SPAD and electronic circuits on the same substrate and provides advantages in time …

    trento Repository record

  8. Behavioral Modeling of CMOS SPADs Based on TCAD Simulations

    López Martínez, Juan Manuel2022

    SPAD stands for Single Photon Avalanche Detectors. SPADs are photodiodes structurally similar to those used in conventional image sensors. However, while the conventional ones are biased in the low voltage zone within the inverse region, where there is no gain, the SPADs are biased in the avalanche …

    sevilla Repository record

  9. Subprofile aware diversification of recommendations

    Kaya, MesutUniversity College Cork2019

    … of intent-aware diversification, which we call SPAD (Subprofile-Aware Diversification). In SPAD and its variants, the aspects are not item features; they are subprofiles of the user’s profile. We present a number of different ways to extract subprofiles from a user’s profile. None of them is …

    cork Repository record

  10. Mobile Multi-Bounce LiDAR

    Somasundaram, SiddharthMassachusetts Institute of Technology2024

    Single-photon avalanche diodes (SPADs) are emerging sensors that can measure the propagation of light in a scene, capturing higher-order reflections, shadows, and light transport that ordinary cameras are unable to. Measurement of these multi-bounce light paths is especially useful for …

    mit Repository record

  11. Evaluating diagnostic tools for phosphorus and sulfur management in corn

    Roa Acosta, Gustavo AdolfoKansas State University2024

    … samples and soil plant analysis development (SPAD) readings were collected. Results indicated that the average critical P tissue concentrations (CPTC) in the whole plant at V6 and the ear leaf at R1 were 4.9 g kg⁻¹ and 3.8 g kg⁻¹, respectively. As the P tissue concentration increases, the …

    ksu Repository record

  12. Uso del clorofilometro SPAD-502 para diagnosticar la deficiencia de nitrogeno en sorgo (Sorghum bicolor L. Moench) de la linea ICSVLM-92512 bajo diferentes dosis de nitrogeno en la Finca El Plantel, Zambrano, Masaya

    Montoya Ruiz, José René, Ordóñez Largaespada, Norman OrlandoUniversidad Nacional Agraria, UNA2009

    … y urea a los45 dds. Se utilizó el clorofilometro SPAD-502 para evaluar la deficiencia del nitrógeno a partir de lecturas relativas del contenido de clorofila en sorgo (línea ICSVLM-92512). Los resultados mostraron que no hubo diferencia estadística significativa para las variables, altura de …

    una Repository record

  13. Single-photon avalanche photodiodes for quantum communication applications in the near-infrared

    Scowen, RosemaryUniversity of Cambridge2023

    … InGaAs-InP single-photon avalanche photodiodes (SPADs) intended for use in near-infrared (NIR) applications, such as light detection and ranging (LIDAR) and quantum key distribution (QKD) systems. Within the work, the effect of the lateral dimensions of the detector’s anode on the experimental …

    cambridge Repository record

  14. Caracterização do teor de nitrogênio foliar e produtividade do feijoeiro com técnicas de visão artificial

    Tormen, Gislaine PachecoUniversidade Federal de Viçosa2008

    … As mesmas folhas utilizadas para obter o valor SPAD foram coletadas para determinar o teor de N presente nas folhas. Os teores de N foliar foram distribuídos em classes baixa, satisfatória e alta. A produtividade também foi dividida em classes baixa, média e alta. Para discriminar classes de N e …

    brazil-ufv Repository record

  15. Leveraging genomic mapping and QTL analysis to enhance drought tolerance of cultivated peanut (Arachis hypogaea L.)

    Kumar, NaveenVirginia Tech2022

    … (NDVI), Canopy Temperature Depression (CTD), SPAD-meter relative chlorophyll content of the leaves (SPAD) and wilting for QTL mapping. Mapping identified 27 minor QTL on eight chromosomes for all physiological characteristics, i.e NDVI, CTD, SPAD and wilting, with logarithmic of odds values …

    vt Repository record

  16. Influência do magnésio sobre o desenvolvimento, produtividade e índices nitrogenados da batata semente básica, cultivada em substrato orgânico e em hidroponia

    Barroso, Fernanda de LimaUniversidade Federal de Viçosa2013

    … (ICH), índice de flavonóis (IFL), índice SPAD (SPAD), teor de N na quarta folha (TN), teor de Mg na quarta folha (TMg). Aos 35 DAE, foram avaliadas, no experimento em hidroponia, as características: altura de planta (APL), número de folhas (NFO), número de hastes (NHA), índice SPAD (SPAD), …

    brazil-ufv Repository record

  17. Qualidade pós-colheita de tubérculos de cultivares de batata influenciada por doses de nitrogênio

    Braun, HederUniversidade Federal de Viçosa2007

    … medido por escala de notas e índice SPAD na periderme dos tubérculos lavados e não lavados; número de gemas brotadas em tubérculos não dormentes; e teor e acúmulo de massa seca e nutrientes nos tubérculos. Para todas as cultivares houve efeito de dose de N sobre o acúmulo de massa …

    brazil-ufv Repository record

  18. Optical quantum random number generation: applications of single-photon event timing

    Wayne, Michael AlanUniversity of Illinois at Urbana-Champaign2017

    … QRNGs are single-photon avalanche photodiodes (SPADs), devices which when operated below their breakdown voltage can create a macroscopic amount of current (an avalanche) in response to a single incident photon. Some of this charge can become trapped in defects or impurities; if this trapped …

    uiuc Repository record

  19. Ground Sensor Based Variable Rate Nitrogen Management

    Noh, Hyun KwonUniversity of Illinois at Urbana-Champaign2003

    … side-dressing applications. Using the estimated SPAD values to support sensor-based variable rate nitrogen application at specific crop growth stages, has the potential of not only increasing the yield, but also of reducing the total N consumption. This result, however, was obtained based on only …

    uiuc Repository record

  20. A vágott virág tartósságát növelő eljárások hatásvizsgálata szegfű és rózsa esetén = The impact assessment of procedures, which increase the vase life of cut flowers, in the case of carnation and rose flowers

    Feigelné Terék, OrsolyaBudapesti Corvinus Egyetem2013

    … magába. 6. A levelek klorofilltartalmának és SPAD értékének meghatározása. Kutatásaimmal a vágott virág tartósítószerek hazai népszerűsítését és elterjesztését is célomnak tekintettem, mely nemcsak a vásárlóknak, de a kereskedelmi lánc minden szereplőjének is érdeke.

    corvinus Repository record

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