Academic literature on the topic 'Modulateur I'
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Journal articles on the topic "Modulateur I"
Cardinal, Serge. "La radio, modulateur de l'audible." Chimères 53, no. 1 (2004): 45–59. http://dx.doi.org/10.3406/chime.2004.1281.
Full textBazin, Jean-Étienne. "Un modulateur du rythme cardiaque." Oxymag 28, no. 140 (January 2015): 9–22. http://dx.doi.org/10.1016/j.oxy.2014.12.001.
Full textDrapier, JC. "NO : un modulateur de l'expression génétique." médecine/sciences 9, no. 10 (1993): 1145. http://dx.doi.org/10.4267/10608/2825.
Full textHeard, Edith, Vincent Colot, and Marie-Neige Cordonnier. "L’épigénétique est un modulateur clé de l’évolution." Pour la Science N° 500 - juin, no. 6 (January 6, 2019): 58–63. http://dx.doi.org/10.3917/pls.500.0058.
Full textRemiens, D., F. Mallecot, J. P. Vilcot, and D. Decoster. "Modulateur electro-optique à onde guidée sur GaAs." Revue de Physique Appliquée 22, no. 11 (1987): 1581–84. http://dx.doi.org/10.1051/rphysap:0198700220110158100.
Full textGuyon, Alice. "Le baclofène est un modulateur allostérique du récepteur CXCR4." médecine/sciences 30, no. 1 (January 2014): 9–12. http://dx.doi.org/10.1051/medsci/20143001002.
Full textAudran, M. "Le raloxifène, modulateur sélectif du récepteur des estrogènes (SERM)." Revue du Rhumatisme 67 (March 2000): 3–6. http://dx.doi.org/10.1016/s1169-8330(00)80054-x.
Full textFarges, Marie-Chantal, Bruno Lamas, Sinda Mahbouli, Ahmad Khalil, and Marie-Paule Vasson. "La leptine : un modulateur de l’activité des cellules Natural Killer ?" Nutrition Clinique et Métabolisme 29, no. 1 (February 2015): 12–25. http://dx.doi.org/10.1016/j.nupar.2014.10.002.
Full textChabbert-Buffet, N., M. Georgiakaki, G. Meduri, L. Amazit, M. Lombès, H. Loosfelt, and A. Guiochon-Mantel. "CO13 - HBO1, un nouveau modulateur du récepteur de la progestérone." Annales d'Endocrinologie 67, no. 5 (October 2006): 385. http://dx.doi.org/10.1016/s0003-4266(06)72628-2.
Full textBoutherin, Valentine, Florence Piastra-Facon, and Emma Risson. "Le microbiote intestinal, un modulateur clé de la physiologie immunitaire." médecine/sciences 35, no. 6-7 (June 2019): 571–74. http://dx.doi.org/10.1051/medsci/2019111.
Full textDissertations / Theses on the topic "Modulateur I"
Prades, Jérémie. "Conception d’un modulateur électro-optique Mach Zehnder 100 Gbits/s NRZ sur silicium." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0205/document.
Full textThe sustained development of software applications including mass storage, intensive computing and broadband communication, motivates the emergence of novel communication technologies. On one hand, communications through metallic interconnections approach their inherent limitations in term of energy, area and cost per bit. On the other hand, conventional hybrid photonics, based on discrete 2D/3D photonic assemblies of III-V photonic devices, cannot be integrated. The rising silicon photonic technology, thanks to its high level of integration, overcomes the shortcomings of the two previous approaches and promises a low cost solution allowing close proximity integration of photonics with electronics.The design of a very high data rate electro-optic modulator on silicon is reported in this thesis manuscript. In a first section, the state of the art of optic systems is presented with a focus on the main technological challenges limiting performances. Then, a silicon based topology is introduced to achieve a 100 Gbs Mach Zehnder modulator. It was implemented with the STMicroelectronics PIC25G technology. The driver of this modulator was designed with the 55 nm SiGe BiCMOS technology of the same founder. The demonstrator introduced in this work offer a 100 Gbs data rate with an NRZ modulation on a single optical channel. For this configuration, this prototype provides a data rate beyond the state of the art (for a single optical transmission path) with an energy per bit of 80 pJ/bit
Mallart, Emmanuel. "Modulateur acoustooptique de lumière blanche adapté à la vidéoprojection grand écran." Valenciennes, 1989. https://ged.uphf.fr/nuxeo/site/esupversions/67649b4c-ab99-4a6c-926d-9e0c90f32b3e.
Full textAbraham, Alexis. "Développement de modulateurs optiques sur silicium à faible consommation énergétique pour les prochaines générations d'interconnexions optiques." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS338/document.
Full textWith the outstanding development of the internet, it is expected that global network traffic will grow exponentially, as well as the concern about the need for high-speed links and interconnections. To address these issues, it is then essential to propose performant systems that will support high speed transmission with low power consumption. Silicon photonics is a promising solution and integrate complex optical functions in a silicon chip, by using standard fabrication process used in microelectronic. In this context, the subject of my PhD is focused on the optical modulator which should support high speed transmission, have low optical losses, and have low power consumption. To obtain these constraints, several parameters need to be optimized while taking account fabrication constraints in order to find the best compromise between the different figures of merit. During this PhD, the improvement of the performances of the component was made by three different ways. The first optimization is related to the simulations for the current technology of modulators based on PN junctions. By integrating the fabrication process in the optimization process, more reliable numerical results are obtain. The key point of this study is the comparison of experimental characterizations and numerical simulations of two architectures of modulator. A substantial part of the PhD was also focused on the development of new modulators based on vertical capacitive junctions. The use of dedicated numerical tools reveals several key aspects of these components, and allow us to optimize two different architectures in order to obtain high efficient modulator. A new fabrication process has been established, and several information were extracted from the first run of fabrication. Then, a comparative study between most of modulators reviewed during this PhD was performed. The results allow us to determine which configuration has the best performances depending of the targeted application. In addition, a compact model was generated to optimize the component in a reduced simulation time
Le, Gall Stephen. "Peau active pour le camouflage dans le visible et l'infrarouge utilisant les cristaux liquides cholestériques." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0097.
Full textThe objective of this thesis is to achieve an active skin for the camouflage of a land vehicle based on cholesteric liquid crystal technology. After analysis of the environment, a texture is applied on the LCDs to reduce the visual and thermal signature of the vehicle. The work consisted of proposing a trichrome liquid crystal device to obtain the colorimetry defined by the specifications. The problems of temperature resistance, specular reflection, gray scale, reflectivity levels, reduction of applied voltages were discussed during this thesis. The proposed technology enabled to realization of a demonstrator on a remote controlledrobot that was presented at Eurosatory 2018 on the stand of the Ministry of the Armed Forces. Work has also been started on the development of optical modulators in the infrared, based on cholesteric liquid crystals, in order to modulate the reflectivity and thus to be able to limit the thermal signature of the vehicle. Several tracks have been tested and proposed
Gendre, Luc. "Conception et réalisation d'un polarimètre de Stokes haute cadence à division temporelle utilisant un unique modulateur à cristaux liquides ferroélectriques pour moduler la polarisation." Phd thesis, Université de Haute Alsace - Mulhouse, 2011. http://tel.archives-ouvertes.fr/tel-00713656.
Full textGemayel, Pierre. "Optique adaptative par modulateur spatial de lumière en microscopie et holographie." Thesis, Mulhouse, 2016. http://www.theses.fr/2016MULH9294/document.
Full textSince the 50s, recovering the phase information of a diffracted beam has a major interest in several fields such as microscopy, astronomy and many others. Generally, the solutions fall into two broad categories: interferometric methods and iterative methods based on beam propagation. The advantage of the latter is that they are less sensitive to noise, and their experimental implementation is simpler. Also, the progress in computer technologies as well in digital imaging devices makes the application of this approach easier and more interesting. However, even if the effectiveness of these methods has been demonstrated in several fields, their use remained limited because of certain requirements on the experimental conditions and the non-convergence of their algorithm to a single solution in many cases. This is even more true for the so-called "complex objects", having an amplitude and a phase, which can greatly reduce their field of application. To overcome the convergence problems and improve the robustness of these methods, many experimental strategies have been employed. They are all based on the same principle, which consists of introducing new well-known constraints in the object plane. This increases the number of acquired spectrum, and therefore diversifies the sources of information about the starting object, which will help the iterative algorithm to converge more quickly towards the final solution. As examples of such experimental strategies, one can record several spectra from different areas of the object, or modulate the wavelength of the incident beam, or also acquire the spectrums across two or more parallel planes connected through Fresnel or Fourier transform.In this context, the present work aims to experimentally demonstrate a technique known as SSPR (Spread Spectrum Phase Retrieval), proposed in 2007 by Zhang, while modifying it in order to make it more flexible. The idea is to introduce, using a liquid crystal spatial light modulator M strong phase modulation into the object field, then record in the Fourier plane the M corresponding spectrums. These M acquisitions will then be used in an iterative algorithm what will allow us to recover the object wavefront by simulating the propagation of the light between spatial and frequency spaces. The first part of this thesis includes a complete study on spatial light modulators; in order to select which one will be best suited for our application. Once liquid crystal spatial light modulators are selected, we present their technical characteristics, as well as the calibration tests needed to ensure their linear and optimal functioning. Then we show several possible applications with this type of component, in various scientific fields, like holography, microscopy, adaptive optics and interferometric methods to reconstruct the phase of a beam.In the second part, we focus our work around the SSPR iterative method. We will show how to make the application of this method simpler by using a liquid crystal spatial light modulator, and by working in Fourier plane instead of Fresnel plane. However, after applying SSPR we have noticed that the quality of experimental results is very inferior to the quality of simulation results. Therefore, a detailed study of the noise sources is conducted. Each of these noise sources adds its own contribution, yet modulator cross-talk remains the factor that deteriorates the most the quality of reconstruction. In fact liquid crystal spatial light modulators are known to have a strong cross-talk between their pixels commonly recognized as fringing field effect. As the pixels are micrometric, each addressed one affects its neighbors, and thus, the phase retardation obtained from a pixel will not be uniform over its entire surface. This will result in a blurring effect of the desired sharp edge between the pixels; therefore, the real displayed phase map will be very different from the addressed one. [...]
Peigné, Arnaud. "Holographie adaptative pour la réalisation de capteurs à fibres optiques de très grande sensibilité : application à la détection d’ondes acoustiques sous-marines." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4005/document.
Full textFiber optic sensors are a key technology for future developments with a large field of applications ranging from structure health monitoring to medical applications. Due to its high compactness, its electromagnetic immunity and the low transmission losses in the telecom window, optical fibers are very promising for underwater acoustic waves detection. We present a method relying on adaptive holographic interferometry based on two beam coupling in an optically addressed spatial light modulator (OASLM). This method allows filtering the slow phase perturbations coming from the environment directly on the sensing optical fiber. In this work, we will first introduce the OASLM operating at 1,55 μm that we have manufactured and the realization of an adaptive holographic interferometer based on this component. Moreover, we will show that it is possible to associate this demodulation method with a multimode optical fiber to reach a better sensitivity. Finally, we will focus on sensors architectures to evaluate the benefit of this technology compared to conventional techniques
Sinquin, Jean-Christophe. "Analyse de surface d'onde infrarouge par modulateur acousto-optique." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37618580c.
Full textRasigade, Gilles. "Modulateur optique haute-fréquence sur subtrat silicium-sur-isolant." Paris 11, 2010. http://www.theses.fr/2010PA112158.
Full textThe silicon photonics has emerged as the key area of research for optical telecommunication with the objective of developing an integrated transceiver fully-compatible with the available CMOS technology. In this context, the work of my thesis is focused on the structure of the optical modulator, integrated on a silicon-on-insulator (SOI) substrate and for applications working at the bitrates of 10 and 40 Gbit/s. Its active structure is based on the carrier depletion obtained in a reverse biased junction and leads to an intensity modulation at the output of a Mach-Zehnder interferometer. The optimization of the structure produced an optical modulator design which exhibits a VpLp product of 1,7 V. Cm. Insertion loss as low as 3dB and a -3 dB cut off frequency of 35 GHz. The light and RF copropagation has been studied as well and has validated the operation of the component at the bitrate of 40 Gbit/s. A CMOS technological process has been established and chips have been fabricated at CEA/LETI then characterized at IEF. Finally, this work has led to the design of a silicon optical modulator with characteristics compatible with 40 Gbit/s applications, as well as general result for the optimization of this component. Its integration with laser sources and photo detectors will lead is the future to the emergence of silicon photonics for integrating optical telecommunication
Baril, Alexandre. "Prototype d'éclairage intelligent aux DELs avec un modulateur lumineux." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27580.
Full textSince the massive invasion of LED lighting over the illumination market, a clear trend of need appeared for a more efficient and targeted lighting. The project leads this trend by developing an evaluation board to test smart lighting applications with a new liquid crystal light modulator recently developed for broadening LED light beams. These modulator are controlled by electricals signals and they are characterised by a very linear working zone. This feature allows the implementation of a closed loop control with a sensor feedback. We show that the use of computer vision is a promising opportunity for closed loop control. The developed evaluation board integrates the liquid crystal modulator, a camera, a LED light source and all the required electronics to implement a closed loop control with a computer vision algorithm.
Books on the topic "Modulateur I"
Lauer, James L. Polarization modulated ellipsometry. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Division, 1986.
Find full textJass, Greta Kaur. Calreticulin modulates cell adhesiveness. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1999.
Find full textBailey, Nicola Ann. Modulated differential scanning colorimetry. Birmingham: University of Birmingham, 1998.
Find full textIntensity-modulated radiation therapy. Bristol: Institute of Physics Pub., 2001.
Find full textNishimura, Yasumasa, and Ritsuko Komaki, eds. Intensity-Modulated Radiation Therapy. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55486-8.
Full textBritanak, Vladimir, and K. R. Rao. Cosine-/Sine-Modulated Filter Banks. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-61080-1.
Full textReading, Mike, and Douglas J. Hourston, eds. Modulated Temperature Differential Scanning Calorimetry. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-3750-3.
Full textPrabhu, N. U. (Narahari Umanath), 1924- and Tang Loon Ching, eds. Markov-modulated processes & semiregenerative phenomena. Singapore: World Scientific, 2009.
Find full textRahman, M. Azizur. An introduction to wavelet modulated inverters. Hoboken, N.J: Wiley-IEEE, 2010.
Find full textLüscher, Thomas F. The Endothelium: Modulator of cardiovascular function. Boca Raton: CRC Press, 1990.
Find full textBook chapters on the topic "Modulateur I"
Weik, Martin H. "modulator." In Computer Science and Communications Dictionary, 1039. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11746.
Full textWeik, Martin H. "modulate." In Computer Science and Communications Dictionary, 1036. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11720.
Full textMoskowitz, I. S., and M. H. Kang. "The Modulated-Input Modulated-Output Model." In IFIP Advances in Information and Communication Technology, 61–75. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-0-387-34932-9_5.
Full textSimola, Nicola, Micaela Morelli, Tooru Mizuno, Suzanne H. Mitchell, Harriet de Wit, H. Valerie Curran, Celia J. A. Morgan, et al. "Drug Modulator." In Encyclopedia of Psychopharmacology, 440. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-68706-1_3209.
Full textWeik, Martin H. "electrooptic modulator." In Computer Science and Communications Dictionary, 507. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6024.
Full textWeik, Martin H. "balanced modulator." In Computer Science and Communications Dictionary, 101. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1309.
Full textWeik, Martin H. "optical modulator." In Computer Science and Communications Dictionary, 1179. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_13092.
Full textWeik, Martin H. "phase modulator." In Computer Science and Communications Dictionary, 1261. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_13926.
Full textWeik, Martin H. "asymmetrical modulator." In Computer Science and Communications Dictionary, 68. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_919.
Full textWeik, Martin H. "telegraph modulator." In Computer Science and Communications Dictionary, 1748. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_19215.
Full textConference papers on the topic "Modulateur I"
Bifano, Thomas, Leah Schatzberg, Jason Stewart, and Steven Cornelissen. "MEMS Modulated Retroreflectors for Secure Optical Communication." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66795.
Full textSong, G., and N. Ma. "Control of Shape Memory Alloy Actuators Using Pulse Width Pulse Frequency (PWPF) Modulation." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/ad-23741.
Full textDekker, P. R., and A. L. van Bloois. "FACILITY FOR CALIBRATION OF PHOTOMETERS FOR TEMPORAL LIGHT MODULATION." In CIE 2021 Conference. International Commission on Illumination, CIE, 2021. http://dx.doi.org/10.25039/x48.2021.op27.
Full textRoa-Prada, S., H. A. Scarton, G. J. Saulnier, D. A. Shoudy, J. D. Ashdown, P. K. Das, and A. J. Gavens. "Modeling of an Ultrasonic Communication System." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43432.
Full textBasu, Saurabh, Zhiyu Wang, and Christopher Saldana. "Modeling Evolution of Microstructures Beneath Topographically Textured Surfaces Produced Using Shear Based Material Removal." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8802.
Full textYoung, Michael D., Jeffrey J. Field, Randy A. Bartels, and Jeff Squier. "Spatial Frequency Modulated Imaging (SPIFI) in Amplitude with a Spatial Light Modulator." In Frontiers in Optics. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/fio.2016.jth2a.57.
Full textWang, Zhaojie, Jian Rong, Xuhong Zhang, and Juanjuan Wang. "Application of Fabry-Perrot modulator to modulated LIDAR system for underwater detection." In 2011 International Conference on Electronics, Communications and Control (ICECC). IEEE, 2011. http://dx.doi.org/10.1109/icecc.2011.6066762.
Full textRombach, S., T. Northemann, M. Maurer, M. Dienger, and Y. Manoli. "Modulated electro-mechanical continuous-time lowpass sigma-delta-modulator for micromachined gyroscopes." In TRANSDUCERS 2011 - 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2011. http://dx.doi.org/10.1109/transducers.2011.5969183.
Full textNing, Jieyu, Yitang Dai, Feifei Yin, Jianqiang Li, and Kun Xu. "Linear demodulation of intensity-modulated analog photonic link based on polarization modulator." In 2014 International Topical Meeting on Microwave Photonics (MWP) jointly held with the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP). IEEE, 2014. http://dx.doi.org/10.1109/mwp.2014.6994543.
Full textLasser, Gregor, Connor Nogales, Maxwell R. Duffy, and Zoya Popovic. "Wideband Phase Modulator MMIC for K-Band Supply-Modulated Power Amplifier Linearization." In 2021 51st European Microwave Conference (EuMC). IEEE, 2022. http://dx.doi.org/10.23919/eumc50147.2022.9784373.
Full textReports on the topic "Modulateur I"
Redmond Clark. Force Modulator System. Office of Scientific and Technical Information (OSTI), April 2009. http://dx.doi.org/10.2172/973811.
Full textErbert, G. Amplitude Modulator Chassis. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/967713.
Full textContarino, Mike, and Linda Mullen. Modulated Pulse Lidar. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada629295.
Full textBintz, Lou, and Alan Mickelson. Ultra-Linear Polymer Modulator. Fort Belvoir, VA: Defense Technical Information Center, May 2006. http://dx.doi.org/10.21236/ada451091.
Full textJones, Franklin B. Solid State Grid Modulator. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada387577.
Full textCassel, Richard. Solid State Induction Modulator Replacement for the Conventional SLAC 5045 Klystron Modulator. Office of Scientific and Technical Information (OSTI), November 2000. http://dx.doi.org/10.2172/784769.
Full textTwesten, R. D., J. M. Millunchick, S. R. Lee, D. M. Follstaedt, E. D. Jones, S. P. Ahrenkiel, Y. Zhang, and A. Mascarenhas. Microstructure of compositionally modulated InAlAs. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/453541.
Full textPapavasiliou, A. Low Voltage Spatial Light Modulator. Office of Scientific and Technical Information (OSTI), February 2003. http://dx.doi.org/10.2172/15005040.
Full textFlusche, Brian M., and Franz Haas. Polymer Modulator Contact Poling Guide. Fort Belvoir, VA: Defense Technical Information Center, September 2004. http://dx.doi.org/10.21236/ada427770.
Full textWarde, Cardinal. Infrared-Sensitive Spatial Light Modulator. Fort Belvoir, VA: Defense Technical Information Center, November 1987. http://dx.doi.org/10.21236/ada190391.
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