Auswahl der wissenschaftlichen Literatur zum Thema „Oscillateur à résistance négative“
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Zeitschriftenartikel zum Thema "Oscillateur à résistance négative"
Fleureau, J. M., und S. Kheirbek-Saoud. „Variations de résistance des sols compactés avec la pression interstitielle négative“. Revue Française de Géotechnique, Nr. 59 (1992): 57–64. http://dx.doi.org/10.1051/geotech/1992059057.
Der volle Inhalt der QuelleBerthier, Fabienne, Jean-Paul Diard und Claude Montella. „La résistance de transfert d'électrons d'une réaction électrochimique peut-elle être négative?“ Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy 325, Nr. 1 (Juli 1997): 21–26. http://dx.doi.org/10.1016/s1251-8069(97)83259-9.
Der volle Inhalt der QuelleBertrand, X., S. Lallemand, M. Thouverez, K. Boisson und D. Talon. „Bactériémies liées aux staphylocoques à coagulase négative : incidence, niveau de résistance à la teicoplanine et épidémiologie moléculaire“. Pathologie Biologie 50, Nr. 9 (November 2002): 552–59. http://dx.doi.org/10.1016/s0369-8114(02)00347-4.
Der volle Inhalt der QuelleFantcho, Joseph Emmanuel, und Patrick Konin N’gouan. „Construction d’un indicateur de concordance culturelle et planification stratégique de la main-d’œuvre“. Revue Congolaise de Gestion Numéro 35, Nr. 1 (24.07.2023): 69–111. http://dx.doi.org/10.3917/rcg.035.0069.
Der volle Inhalt der QuelleMouradi, Sara, Gérard Motte, Stéphane Torner, Pierre Lebugle, Nelly Petitboulanger, Aziz Bemmerzouk und Pierre-Yves Charles. „Péritonite à Sphingobium yanoikuyae en dialyse péritonéale : à propos d’un cas.“ Bulletin de la Dialyse à Domicile 6, Nr. 3 (13.11.2023): 123–27. http://dx.doi.org/10.25796/bdd.v6i3.80703.
Der volle Inhalt der QuelleMajouri, D., A. Touati, W. Achour, O. Bouchami und A. Ben Hassen. „Comparaison des méthodes phénotypiques par rapport à la PCR pour le dépistage de la résistance à la méticilline chez les staphylocoques à coagulase négative“. Pathologie Biologie 55, Nr. 8-9 (November 2007): 361–65. http://dx.doi.org/10.1016/j.patbio.2007.06.010.
Der volle Inhalt der QuelleAUMAITRE, L. A. „Les aliments issus de plantes génétiquement modifiées : équivalence, efficacité et sécurité chez les animaux de ferme“. INRAE Productions Animales 15, Nr. 2 (12.04.2002): 97–108. http://dx.doi.org/10.20870/productions-animales.2002.15.2.3690.
Der volle Inhalt der QuellePupin, H., C. Bébéar, F. Mégraud, O. Join Lambert und P. Lehours. „Évaluation du moxalactam par diffusion en milieu gélosé et à l’aide de l’automate Phoenix™ pour la détection de la résistance à la méticilline des staphylocoques à coagulase négative“. Antibiotiques 9, Nr. 4 (Dezember 2007): 254–59. http://dx.doi.org/10.1016/s1294-5501(07)73922-5.
Der volle Inhalt der QuelleDeslandes, J. „P034: Réanimation cardio-pulmonaire sans période de “no-flow”: un nouveau dispositif“. CJEM 18, S1 (Mai 2016): S89—S90. http://dx.doi.org/10.1017/cem.2016.210.
Der volle Inhalt der QuelleCAHU, C., und H. POULIQUEN. „Troisième partie : Mesures de gestion du risque d’apparition des maladies infectieuses aquacoles“. INRAE Productions Animales 20, Nr. 3 (07.09.2007): 227. http://dx.doi.org/10.20870/productions-animales.2007.20.3.3461.
Der volle Inhalt der QuelleDissertationen zum Thema "Oscillateur à résistance négative"
Mao, Yuqing. „Nouvelle génération de générateurs de fréquence par auto-calibration de la grille arrière des transistors en technologie FDSOI“. Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ4123.
Der volle Inhalt der QuelleModern data communication systems heavily rely on synchronous transmission techniques to optimize bandwidth and minimize power consumption. In such systems, only the data signal is transmitted, necessitating the implementation of Clock and Data Recovery (CDR) circuits at the receiver end. This thesis explores the novel application of Fully-Depleted Silicon-On-Insulator (FDSOI) 28nm technology to enhance the performance of CDR circuits by mitigating short-channel effects through innovative transistor structures.One contribution of this thesis is the development of a negative resistance circuit using the back gate of the FDSOI transistor. This circuit employs a current mirror controlled by the back gate to create a negative resistance LC oscillator. In parallel, this work presents the implementation of two types of oscillators: a complementary ring oscillator and a fast ring oscillator. The complementary ring oscillator capitalizes on complementary inverters, offering automatic bias feedback by the back gate control, thereby enhancing its performance. Meanwhile, the fast ring oscillator uses fast inverters in combination with complementary inverters designed to minimize propagation delays. The thesis presents a detailed comparative analysis of these oscillators, highlighting their individual strengths and limitations. Furthermore, we introduce an injection signal into the ring oscillator, resulting in the creation of a low-jitter Injection-Locked Oscillator (ILO). This ILO exhibits remarkable performance characteristics, particularly in reducing phase noise and enhancing frequency stability. Taking advantage of the good performance of the ILO, we propose a novel low-cost and low-power Injection-Locked Clock and Data Recovery (ILCDR) with a fast-locking time and good jitter for burst-mode applications.To validate the proposed designs and their performance at different operational frequencies, extensive simulations have been carried out using Cadence Virtuoso at 868 MHz and 2.4 GHz. In addition, the layout design and post layout simulation of the ILCDR based on the complementary ring oscillator are also studied
Druelle, Yves. „Contribution à la compréhension de fonctionnements particuliers du transistor bipolaire en hyperfréquences“. Lille 1, 1985. http://www.theses.fr/1985LIL10041.
Der volle Inhalt der QuelleBoucherit, Mohamed. „Etude et réalisation de dispositifs hyperfréquences sur matériaux grand gap : diode à effet tunnel résonant AlxGa1-xN/GaN, transistor HEMT boré à base de nitrure de gallium“. Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10004/document.
Der volle Inhalt der QuelleThe work described in this thesis contributes to the improvement on some circuit based on wide band gap semiconductors. The first concerns the oscillators and the second RF amplifiers at microwave frequencies. Components selected to build these two devices are resonant tunneling diodes and high electron mobility transistors. This thesis is divided into two distinct parts:-The resonant tunneling diodes AlGaN/GaN: a software that provides a rigorous description of vertical transport in nitride heterostructures does not exist or are not available in Europe. In this thesis, we developed a model based on the self-consistent resolution of the Schrödinger and Poisson equation using the non-equilibrium Green functions. The strategy employed to obtain some heterostructures free from dislocations is based on the realization of nano-diodes in the following two approaches. The first approach "bottom-up" implements the technique of selective epitaxy on nano-patterned GaN template. The second approach called "top down" is based on the reduction of device size and consequently the number of dislocations. The electrical characteristics of these nano-diodes have been measured by FIB, Nanoprobe and vector network analyzer. The negative differential resistance is studied depending in both direction of bias, electrical treatment, temperature and aluminum incorporation in the AlGaN barriers layers.- The high electron mobility transistors AlGaN/GaN: the second part was aimed to perform a conventional AlGaN/GaN HEMT structure exhibiting in the state of the art performance. To do that, we focused on improving the resistivity of the GaN buffer layer by incorporating either of aluminum or boron. Several positions and thicknesses of BGaN layer in the conventional AlGaN /GaN HEMT structure were tested to determine the optimal structure. Comparative studies between AlGaN/GaN HEMT structures with and without BGaN layer have shown that the use of BGaN layer as a back-barrier drastically improves the carrier confinement in the 2DEG channel and significantly reduces the residual doping of the active area
Hombrouck, Cécile. „Haemophilus influenzae, B-lactamase négative - "ampicilline résistants" : détection et étude de la résistance“. Paris 5, 1999. http://www.theses.fr/1999PA05P172.
Der volle Inhalt der QuelleBaraton, Laurent. „Fabrication et étude d'une diode moléculaire à résistance différentielle négative greffé sur silicium terminé hydrogène“. Paris 11, 2004. https://tel.archives-ouvertes.fr/tel-00150238.
Der volle Inhalt der QuelleNowdays the microelectronic and semiconductor industry is challenged by economical and fundamental issues. In that context of developpement of alternative technologies, this work aimed to developp an electronic device, that can be handled at macroscpic scale, but in which the active component is a small number of molecules. That vertical device is made of complex molecule sandwiched between a silicon bottom electrode and a nanotube as a top electrode. In order to achieve it, work was made in two directions. In a first part, we studied feasibility of a complex monolayer, covalently bounded of a silicon substrat, trough a multistep process. In order to preserve the properties of electronic injection between silicon and the monolayer, a particluar attention was paied to the stability of the silicon substrat. In a second part, a top down process was set up to manufacture a chip. It is intend to reciev the monolayer and to connect it to macroscopic leads. It is achieved using carbon nanoutubes. The complet monolayer and the device were achieved separatly but no electrical measure could be perform at this day
Stolar, David. „Expression phénotypique et difficulté de détection de la méticillino-résistance chez les staphylocoques à coagulase négative“. Paris 5, 1999. http://www.theses.fr/1999PA05P179.
Der volle Inhalt der QuelleBarbier, François. „Diffusion de la résistance à la méticilline chez les souches communautaires de staphylocoques à coagulase négative“. Paris 7, 2013. http://www.theses.fr/2013PA077243.
Der volle Inhalt der QuelleOur objectives were to appraise the epidemiological patterns of methiillin-resistant coagulase-negative staphylococci (MRCNS) carriage in the community and to assess the role of MRCNS in the dissemination of Staphylococcal Cassette Chromosome mec (SCCmec) elements in this environment. Rates of MRCNS nasal carriage ranged from 11% to 50% (6 distinct geographic regions). Chronic comorbidities and living with other persons at home were associated with an increased risk of carriage. MR Staphylococcus epidermidis (MRSE) (from 32% to 78% of MRCNS isolates) were characterized by MLST and MLVA: a marked diversity was observed, suggesting that new strains commonly emerge in the community. SCCmec elements were highly polymorphic. SCCmec IV, the leading type in community-acquired MRSA (CA-MRSA), was the most frequent cassette in MRSE. Complete sequences of SCCmec IV from MRSE were >99% identical to those described in epidemic clones of CA-MRSA. These findings strongly suggest that CA-MRSE are a potential source of SCCmec IV for S. Aureus in the community. The Arginine Catabolic Mobile Element (ACME) found in 68% of CA-MRSE strains may esse their persistence in the skin and mucosal microbiota. The impact of antimicrobials on CA-MRCNS carriage was investigated in 479 primary care patients. CA-MRCNS acquisitions were more frequent in patients receiving penicillinase-resistant penicillins than in those treated by fluoroquinolones, macrolides or pristinamycin. These results point out that MRSE and other MRCNS are widely disseminated in the community, and form a dynamic reservoir of SCCmec elements in this environment
Meunier, Philippe. „Etude de circuits monolithiques simulant une résistance négative intégrables dans des filtres actifs microondes à résonateurs microruban“. Limoges, 1995. http://www.theses.fr/1995LIMO0003.
Der volle Inhalt der QuelleBoukrout, Nihad. „Rôle de la boucle de régulation négative MUC4-miR-210-3p dans la cancérogenèse pancréatique et la chimio-résistance“. Thesis, Université de Lille (2022-....), 2022. https://pepite-depot.univ-lille.fr/LIBRE/EDBSL/2022/2022ULILS003.pdf.
Der volle Inhalt der QuelleBackground: Pancreatic adenocarcinoma (PDAC) is a deadly cancer with anextremely poor prognosis. MUC4 membrane-bound mucin is neoexpressed in earlypancreatic neoplastic lesions and is associated with PDAC progression andchemoresistance. In cancers, miRNA (small noncoding RNAs) are crucial regulatorsof carcinogenesis, chemotherapy response and even metastatic processes. In thisstudy, we aimed at identifying and characterizing miRNAs activated downstream ofMUC4-associated signaling in pancreatic adenocarcinoma. MiRnome analysiscomparing MUC4-KD versus Mock cancer cells showed that MUC4 inhibitionimpaired miR-210-3p expression. Therefore, we aimed to better understand themiR-210-3p biological roles.Methods: miR-210-3p expression level was analyzed by RT-qPCR in PDACderivedcell lines (PANC89 Mock and MUC4-KD, PANC-1 and MiaPACA-2), as wellas in mice’s and patients’ tissues. The MUC4-miR-210-3p regulation wasinvestigated using luciferase reporter construct and chromatin immunoprecipitationexperiments. Stable cell lines expressing miR-210-3p or anti-miR-210-3p wereestablished using Crispr/Cas9 technology or lentiviral transduction. We evaluated thebiological activity of miR-210-3p in vitro by measuring cell proliferation and migrationand in vivo using a model of subcutaneous xenograft.Results: miR-210-3p expression is correlated with MUC4 expression inPDAC-derived cells and human samples, and in pancreatic PanIN lesions of Pdx1-Cre; LstopL-KrasG12D mice. MUC4 enhances miR-210-3p expression levels viaalteration of the NF-κB signaling pathway. Chromatin immunoprecipitationexperiments showed p50 NF-κB subunit binding on miR-210-3p promoter regions.We established a reciprocal regulation since miR-210-3p repressed MUC4expression via its 3′-UTR. MiR-210-3p transient transfection of PANC89, PANC-1and MiaPACA-2 cells led to a decrease in cell proliferation and migration. Thesebiological effects were validated in cells overexpressing or knocked-down for miR-210-3p. Finally, we showed that miR-210-3p inhibits pancreatic tumor growth andproliferation in vivo.Conclusion: We identified a MUC4-miR-210-3p negative feedback loop inearly-onset PDAC, but also revealed new functions of miR-210-3p in both in vitro andin vivo proliferation and migration of pancreatic cancer cells, suggesting a complexbalance between MUC4 pro-oncogenic roles and miR-210-3p anti-tumoral effects
Lepercq, Pierre. „Supraconducteurs à haute température critique : caractérisation en microondes et réalisation d'un oscillateur quasi-intégré à 12 GHz“. Lille 1, 1996. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1996/50376-1996-101.pdf.
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