Academic literature on the topic 'Structure RX'
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Journal articles on the topic "Structure RX"
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Abou Houran, Mohamad, Xu Yang, and Wenjie Chen. "Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications." Electronics 9, no. 3 (March 23, 2020): 526. http://dx.doi.org/10.3390/electronics9030526.
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A cylindrical joint structure for wireless power transfer (WPT) systems is proposed. The transmitter (Tx) and receiver (Rx) coils were wound on hemicylindrical and cylindrical structures, respectively. The Rx coil rotates freely around the axial direction of the Tx coil. Different methods of winding the Tx and Rx coils are given and discussed. Electromagnetic fields (EMFs) around the WPT windings should be lower than the limits set by WPT standards. Therefore, the WPT windings were designed to reduce EMF level and maintain constant power-transfer efficiency (PTE). The design procedures of the windings are discussed in detail. EMF analysis was done under different rotation angles (α). The selected design reduced the variation of the mutual inductance (M). As a result, it maintained a constant PTE while rotating the Rx coil between 0° and 85°. Moreover, leakage magnetic fields (LMFs) near the WPT coils of the chosen design were reduced by 63.6% compared with other winding methods that have the same efficiency. Finally, a prototype was built to validate the proposed idea. Experiment results were in good agreement with the simulation results. The WPT system maintained constant efficiency in spite of the rotation of Rx coil, where efficiency dropped by only 2.15% when the Rx coil rotated between 0° and 85°.
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Löwe, Christiane, Gottfried Huttner, Laszlo Zsolnai, and Heinz Berke. "Acetalisierte Formylmangan-Komplexe / Acetals of Formyl Manganese Complexes." Zeitschrift für Naturforschung B 43, no. 1 (January 1, 1988): 25–30. http://dx.doi.org/10.1515/znb-1988-0106.
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Abstract Acetal complexes of the type (OC)5 MnCH(XR)2 , RX = PhO (1a), (RX)2 = 1,2-dioxybenzene (1b), (RX), = S-(CH2)3-S (2) and (5) were synthesized. Glyoxyloyl acetal derivatives (OC)5 MnC(O)CH(XR)2, RX = PhO (3a), (RX)2 = 1,2-dioxybenzene (3b), (RX)2 = S-(CH2)3-S (4) were obtained by the action of NaMn(CO)5 upon the corresponding acid chlorides or anhydrides, la can be transformed to 3a by CO insertion, 1a has been characterized by an X-ray structure determination.
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Hollis, J. M., F. Yusef-Zadeh, T. J. Cornwell, R. J. Oliversen, A. G. Michalitsianos, and M. Kafatos. "RX Puppis - Detection of asymmetrical radio structure." Astrophysical Journal 337 (February 1989): 514. http://dx.doi.org/10.1086/167119.
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Laksono, P. B., and M. Alaydrus. "Improved Efficiency of Inductive Power Transfer in Misalignment Conditions with Multi Coil Design." Advanced Electromagnetics 8, no. 1 (March 17, 2019): 30–36. http://dx.doi.org/10.7716/aem.v8i1.904.
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In charging process of electric vehicle, a misalignment between the transmitter (Tx) and receiver (Rx) coupling structure decreases the efficiency of the wireless power transfer. In inductive power transfer system, misalignment reduces the effective coupling between the Tx and Rx coils. In this work, based on previous multiple coil structures, a new multi coil design in proposed to increase the efficiency of the power transfer. Here, a multi coil structure with two rectangular and four spiral coils is designed with the overall dimension of the coil structure 26.5 cm x 36.5 cm. The measurement shows, that for coil distance below 10.3 cm and a lateral misalignment of maximal 10 cm (27.4%), the efficiency of the designed multi coil structure is better compared to previous coil structures. However for larger coil distance or larger misalignment, the efficiency of the new coil structure deteriorates significantly.
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Kim, Young-Jun, Gunhark Noh, Han Lim Lee, and Sungwook Yu. "Dual-Polarized Multi-Channel 24 GHz Radar Sensor Antenna for High Channel-to-Channel Isolation." Sensors 20, no. 18 (September 14, 2020): 5233. http://dx.doi.org/10.3390/s20185233.
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This article presents a dual-polarized, high gain multi-beam and high T/Rx channel-to-channel isolation antenna module for 24 GHz sensor applications. The proposed antenna is configured to support 2-Tx and 2-Rx channels with a pair of vertically polarized (VP) radiation pattern and a pair of horizontally polarized (HP) radiation pattern. Further, each linearly polarized T/Rx antenna is configured by 2 × 4 array with a multi-layer integrated feed network, resulting in four sets of 2 × 4 array antennas fabricated within a single printed circuit board (PCB). Since multiple RF channels must be ensured with minimal interference, high antenna-to-antenna, including Tx-to-Tx, Rx-to-Rx, and Tx-to-Rx port isolations in the proposed antenna are achieved by multi-layered feed network and four sets of T-shaped magnetic walls. To verify the performance of the proposed structure, a 2-Tx and 2-Rx antenna module was fabricated at 24 GHz. The fabricated antenna showed a measured maximum 10-dB impedance bandwidth of 3.9% with a maximum measured gain of 11.7 dBi, considering both Tx and Rx. Further, the measured channel-to-channel isolations were always better than 35.6 dB at 24 GHz.
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Efanov, Alexandre M., Sergei V. Zaitsev, Ioulia B. Efanova, Shunsheng Zhu, Claes-Göran Östenson, Per-Olof Berggren, and Suad Efendić. "Signaling and sites of interaction for RX-871024 and sulfonylurea in the stimulation of insulin release." American Journal of Physiology-Endocrinology and Metabolism 274, no. 4 (April 1, 1998): E751—E757. http://dx.doi.org/10.1152/ajpendo.1998.274.4.e751.
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The objective of this study was to compare effects of RX-871024, a compound with imidazoline structure, and the sulfonylurea glibenclamide, representatives of two groups of ATP-dependent potassium channel (KATP) blockers, on insulin secretion and cytoplasmic free calcium concentration ([Ca2+]i). Furthermore, we studied the interaction of the compounds on these two parameters. The experiments were performed in the perfused rat pancreas, isolated rat pancreatic islets, and dispersed β-cells. At maximal effective concentrations of the compounds, RX-871024 had a more pronounced insulinotropic effect than glibenclamide, but the increase in [Ca2+]iwas similar. Glibenclamide enhanced the insulinotropic effect of suboptimal concentrations of RX-871024 at 3.3 and 16.7 mM glucose. Notably, glibenclamide and RX-871024 also stimulated insulin secretion under Ca2+-clamped conditions, i.e., during plasma membrane depolarization with KCl and glucose or in permeabilized islets. The magnitudes of insulin stimulation under the latter types of conditions were similar for both compounds. It is concluded that RX-871024 and the sulfonylurea glibenclamide promote insulin secretion by two mechanisms, namely closure of KATP channels and a direct stimulation of exocytosis. At a similar increase in [Ca2+]i, the maximal stimulatory effect of RX-871024 on insulin secretion was stronger than that of glibenclamide, implying that RX-871024 also affects insulin secretion by a signal transduction pathway that is not activated by glibenclamide.
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Taha, Emad, Samia Hekal, and Ahmed Ibrahim Nasr. "Evaluating skin quality of some rabbit breeds under Egyptian conditions." World Rabbit Science 25, no. 2 (June 28, 2017): 193. http://dx.doi.org/10.4995/wrs.2017.6652.
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Histological skin parameters in addition to mechanical and chemical properties of chrome tanned rabbits’ furs were determined in this study to evaluate and compare the quality of some rabbit breeds. Seventy-nine male rabbits aged 3 mo of New Zealand White (NZW, n=27), Rex (RX, n=24) and Gabaly (GB, n=28) were used. Results showed that GB skins had the highest values in skin weight (P<0.01) and area (P<0.05) followed by NZW and RX skins, respectively. Moreover, NZW skins differed in histological structure from the other 2 breeds, as total thickness and thickness of papillary and hypodermis layers in NZW were more than twice those of RX and GB (P<0.05). This structure is caused by an increase in fine collagen fibre bundles in papillary layer and a limited increase in larger collagen fibre bundles in the reticular layer. Furthermore, finished tanned furs properties clarify the superiority of GB furs in values of tensile and tearing strengths followed by NZW and RX, respectively. These results point to the possibility of using the chrome tanned furs of the 3 breeds in leather garment manufacturing.
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Konpang, Jessada, and Natchayathorn Wattikornsirikul. "Four-Port Dual-Mode Diplexer with High Signal Isolation." Active and Passive Electronic Components 2020 (February 10, 2020): 1–5. http://dx.doi.org/10.1155/2020/4032673.
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An ease of four-port dual-mode diplexer with high signal isolation is presented. A compact dual-mode diplexer with high signal isolation between the Rx and Tx modules is achievable by only using one resonator filter topology. Two back-to-back dual-mode diplexers have a 180° phase shift in one branch. The high isolation can be achieved by amplitude and phase cancellation technique. The delayed transmission line can be easily achieved by the phase shifter. The simulated and measured four-port dual-mode diplexers are designed at the centre frequency of Rx/Tx at 1.95 GHz and 2.14 GHz, respectively. The measured results of Rx/Tx dual-mode diplexer devices are presented with 47.1 dB Rx/Tx isolation. This four-port dual-mode diplexer achieves the isolation (S32) of more than 24.1 dB when compared with the conventional three-port dual-mode diplexer structure.
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Popov, S. B., R. Taverna, and R. Turolla. "Probing the surface magnetic field structure in RX J1856.5−3754." Monthly Notices of the Royal Astronomical Society 464, no. 4 (October 18, 2016): 4390–98. http://dx.doi.org/10.1093/mnras/stw2681.
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Criqui, Michael H., Julie O. Denenberg, Cameron E. Bird, Arnost Fronek, Melville R. Klauber, and Robert D. Langer. "The Correlation between Symptoms and Non-Invasive Test Results in Patients Referred for Peripheral Arterial Disease Testing." Vascular Medicine 1, no. 1 (February 1996): 65–71. http://dx.doi.org/10.1177/1358863x9600100112.
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The WHO/Rose questionnaire has served as the epidemiologic and clinical standard in the assessment of leg pain in patients with peripheral arterial disease (PAD) for over three decades. However, the structure of this questionnaire does not allow assessment of leg-specific (i.e. right versus left) symptoms. We studied 508 patients aged 39–95 years (mean 68 years), initially referred for PAD non-invasive testing. A revised questionnaire, the San Diego Claudication Questionnaire, was administered which allowed determination of leg-specific symptoms and evaluated thigh and buttock as well as calf pain. Leg-specific symptoms were categorized into no pain, pain at rest, non-calf claudication, non-Rose calf claudication, and Rose claudication. At the same visit, the ankle brachial index, the toe brachial index, and peak posterior tibial flow velocity were measured by Doppler ultrasound and five categories of non-invasive results by type and severity of PAD were defined. Legs with previous intervention (Rx), surgery or angioplasty, were evaluated separately. Claudication was reported in 42% of no Rx legs and 50% of Rx legs; 40% of claudication was atypical (not Rose); 64% of no Rx and 81% of Rx legs had PAD by non-invasive testing, and 27% of affected legs had severe PAD. The correlation between the severity of symptoms and the severity of ipsilateral PAD in no Rx legs was r=−0.40, p< 0.001. In Rx legs, this correlation was somewhat less ( r=0.27, p< 0.001) due to more symptomatology at lesser degrees of PAD, suggesting reporting bias and/or more residual disease than evident from non-invasive testing. To our knowledge, these results provide the first comparison between a standardized assessment of leg pain and the severity of ipsilateral PAD by non-invasive testing.
Dissertations / Theses on the topic "Structure RX"
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Farnham, Garry. "A structure-function analysis of the plant disease resistance protein Rx." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405722.
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Laffont, Lydia. "Structure et propriétés physiques de matériaux polyaromatiques par MET, EELS, et RX." Toulouse 3, 2002. http://www.theses.fr/2002TOU30129.
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Zaij, Rachid. "Obtention de données précises en RX sur un monocristal de MnO : étude de la densité radiale de charge." Montpellier 2, 1990. http://www.theses.fr/1990MON20095.
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Des mesures fines par diffraction x ont ete obtenues sur un monocristal de mno. Les corrections inherentes pour atteindre des facteurs de structure experimentaux tres precis ont ete appliquees. L'analyse directe multipolaire n'a ete appliquee qu'a l'ordre zero. Les resultats de l'analyse montrent que les etats ioniques sont respectivement mn#2#+ et o#2#, que l'oxygene presente une forte contraction dans le reseau et que, seuls, 9 electrons de o#2 sont presents a l'interieur de la sphere de rayon de meilleure separation, le dixieme electron etant distribue plus largement dans l'espace environnant. Simultanement, des etudes paralleles sur les donnees de sasaki et al. Et de uno ont montre que seules les donnees obtenues par le present travail sont aptes a une etude plus approfondie
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Tonnerre, Jean-Marc. "Étude de la structure locale d'un catalyseur d'hydrodésulfuration Ni-Mo non supporté par la diffusion anomale des RX." Paris 11, 1989. http://www.theses.fr/1989PA112284.
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Ce mémoire est consacré à l'étude, par la diffusion anomale des RX, de la phase "NiMoS" de type MoS2 d'un catalyseur d'hydrodésulfuration Ni-Mo non supporté. L'activité catalytique de ces systèmes multiphasiques est reliée à la présence d'une phase NiMoS qui apparaît sous forme de petites cristallites présentant une structure de type MoS2. Afm de l'isoler, nous avons étudié un échantillon avec une faible concentration en Ni (7%). Au sein de cette phase, la position des atomes promoteurs Ni est le sujet de controverses. Pour certains auteurs, ils s'insèrent entre les feuillets S-Mo-S sur le bord des cristallites dans des sites "pseudo intercalés"; pour d'autres, ils se substituent aux Mo sur le pourtour des feuillets. Afm de lever l'ambiguïté, liée au manque d'informations sur les seconds voisins, nous avons utilisé la diffusion anomale différentielle pour sonder l'ordre local sur plusieurs sphères de coordination autour de chaque espèce métallique. Les résultats au seuil d'absorption K du Mo montrent que cette technique, initialement développée pour la caractérisation structurale de matériaux désordonnés, s'applique à l'étude de matériaux mal-cristallisés. Les distances et les nombres de coordination des premiers voisins, sont corrects respectivement à ±0. 02 A et 10%. Au seuil K du Ni, la faible concentration des atomes promoteurs conduit à un signal différentiel très faible (ôl/1-3%). Les résultats sont plus bruyants et le traitement des données a nécessité un soin particulier. Ils montrent clairement que le Ni est dans un site Mo et donc élimine le modèle de "pseudo-intercalation". L'analyse des nombres de coordinence ne permet pas de préciser directement la localisation des Ni. Deux situations substituées (dans le volume, sur les bords) ont été testées en simulant les fonctions de distribution différentielle. Le meilleur accord modèle expérience s'établit pour la localisation sur les bords. Enfin l'analyse d'expériences EXAFS au seuil du Ni semble indiquer la présence de corrélations possédant une distance Ni-Ni très proches de celle des corrélations Ni-Sen premier voisin.
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Vidal, Vladimir. "Multicouches tungstène-silicium pour les optiques RX à 0,154 nm : Etude de la structure interfaciale et mise en forme." Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2009. http://tel.archives-ouvertes.fr/tel-00566902.
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Ce travail de thèse porte sur la mise en oeuvre d'optiques focalisantes à base de multicouches tungstènesilicium réalisées par pulvérisation cathodique RF pour la longueur d'onde 0,154 nm qui correspond à la raie Kα du cuivre. Ce travail a montré la faisabilité de telles optiques avec un gradient de période allant de 1,8 nm à 2,2 nm et pouvant fonctionner avec des angles d'incidence élevés de l'ordre de 2 degrés. L'étude des spectres de réflectivité, de diffraction et, de fluorescence et de structure fine d'absorption excitées par onde stationnaire (GIXA : glancing-incidence X-ray Analysis et SWEXAFS : Standing Wave Extended X-Ray Absorption Fine Structure) a permis de caractériser la structure des couches et de la structure interfaciale des systèmes W/Si et de définir un modèle structural pour les multicouches dépendant de la quantité de tungstène déposée. Ce modèle permet d'expliquer la perte de réflectivité des multicouches à faible épaisseur par la présence d'une couche de mélange aux interfaces. Nous avons également étudié la mise en forme de ces optiques adaptées à une source de laboratoire et permettant d'obtenir un faisceau convergent. L'utilisation de la contrainte résiduelle comme outil de mise en forme a été étudiée comme alternative à une courbure mécanique.
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Harmouchi, Mohamed. "Étude des transitions de formes A-B et B-C dans les ADN en fibres et effets de tensions mécaniques : Diffraction des RX et microscopie optique." Nancy 1, 1989. http://www.theses.fr/1989NAN10178.
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Étude des transitions de forme A-B et B-C dans les ADN en fibres sous différentes conditions physicochimiques (sel, humidité relative, composition en base et tension mécanique appliquée), par diffraction des RX et microscopie optique des fibres. L'association de ces deux techniques permet de relier les paramètres moléculaires déterminés par RX et les dimensions macroscopiques obtenues par observation au microscope
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Marchesini, Stefano. "X ray fluorescence holography." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10012.
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Dans de nombreux cas la structure atomique des solides ne peut etre resolue par les techniques traditionnelles de la cristallographie. Cela peut etre le cas, par exemple, pour les etudes locales d'impuretes diluees, les interfaces enterrees et plus generalement les systemes non periodiques. En 1996 une nouvelle methode structurale, l'holographie x a resolution atomique est apparue. Elle a pour origine la technique d'imagerie holographique, inventee par gabor il y a 50 ans. Dans ce travail, nous presentons d'abord le principe et le cadre theorique de l'holographie par fluorescence, fondes sur le concept de source / detecteur interne. Puis nous decrivons les developpements techniques que nous avons progressivement obtenus, afin de transposer cette methode des rayons x de laboratoire vers la source synchrotron esrf ; ceci sous le double point vue du montage experimental et de l'analyse des donnees. Des resultats intermediaires interessants sont l'imagerie des configurations des lignes de kossel et des ondes stationnaires, a partir desquelles des informations structurales - parametre de reseau, symetrie et orientation cristallines - peuvent etre deduites. Puis l'hologramme et la reconstruction atomique de monocristaux modeles tels que coo(111) sont presentes, avec - pour la premiere fois, une resolution isotrope de 0,5 a et une qualite d'image qui n'avait pas ete obtenue jusqu'a present. Enfin, la premiere application de l'holographie par fluorescence aux films epitaxiques est donnee. Des differences significatives entre des films d'alliages fept chimiquement ordonne et desordonne ont ete obtenus, ouvrant la voie a l'etude de l'ordre a courte distance directionnel dans de tels systemes, au-dela des possibilites de la spectroscopie xafs. De nouvelles perspectives sont offertes en conclusion, concernant l'holographie atomique resolue en temps, ainsi que - sur la base d'une etude preliminaire d'holographie nucleaire - le potentiel de cette technique pour le magnetisme local et la selectivite en site.
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Cochereau, Thibaud. "Structure et Mécanique du pli vocal humain : caractérisation et modélisation multi-échelles." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI018/document.
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Le pli vocal humain possède des propriétés vibratoires exceptionnelles. Il est capable de supporter de grandes déformations, pour différent type de chargement, de manière répétée et réversible. Ces propriétés vibro-mécaniques particulières sont étroitement liées à sa microstructure: une structure multi-couches complexe fortement hétérogène composées de réseaux de fibres protéique. Cependant, il est encore aujourd'hui difficile de décrire précisément l'implication des spécificités microstructurales du pli dans son comportement biomécanique.Afin de préciser ce lien et d'aller vers une meilleure compréhension du comportement du tissu vocal, cette étude se propose d'aborder la problématique sous trois approches complémentaires, mélant caractérisation microstructurale, caractérisation mécanique et modélisation numérique. Dans un premier temps, la microstructure du pli a été étudiée emph{ex vivo} à l'aide d'une technique originale basée sur la tomographie à rayon X. L'usage de tomographie synchrotron par contraste de phase a permis de révéler la structure du tissu à différentes échelles. En particulier, des clichés 3D à forte résolution de la structure fibreuse des couches supérieures et musculaires du tissu ont pu être acquis. Ces clichés ont donné lieu à une analyse 3D quantitative de l'arrangement fibreux, permettant la détermination de descripteur d'orientation et de géométrie 3D des fibres.Dans un second temps, le comportement mécanique du tissu sous différentes conditions de chargement a été étudié. Un protocole a été proposé, afin de caractériser un même échantillon en traction, en compression et en cisaillement. Ces essais ont permis de compléter les connaissances existantes sur la biomécanique de pli, et constitue des données de références importantes pour la construction et la validation de modèle numérique.A partir des données acquises expérimentalement, un modèle micro mécanique a été développé. Ce modèle a la spécificité de prendre en compte l'arrangement 3D du tissu à travers une représentation idéalisée mais pertinente de sa microstructure fibreuse. Les réponses macroscopiques prédites pour différents chargements ont pu être comparées à l'expérience pour validation. A l'échelle microscopique, la cinématique des fibres au cours du chargement a pu être simulée. Les micromécanismes ayant lieu au cours de la déformation du réseau fibreux ont ainsi pu être identifiés, ouvrant de nouvelles perspectives dans la compréhension des propriétés multi-échelles du tissuThe human vocal fold owns exceptional vibratory properties. It is capable of withstanding large deformations, for different types of loading, in a repeated and reversible manner. These particular vibro-mechanical properties are closely linked to its microstructure: a multi-layer complex structure composed of highly heterogeneous protein fibre networks. However, it is still difficult today to describe precisely the implication of the microstructural specificities of the fold in its biomechanical behaviour.In order to clarify this link and to move towards a better understanding of the behaviour of the vocal tissue, this study proposes to approach the problem under three complementary approaches, combining microstructural characterization, mechanical characterization and numerical modelling. First, the microstructure of the fold was studied emph{ex vivo} using an original technique based on X-ray tomography. The use of synchrotron tomography in phase retrieval mode has revealed the structure of the tissue at different scales. In particular, high-resolution 3D images of the fibrous structure of the upper and muscular layers of the tissue were acquired. These images gave rise to a quantitative 3D analysis of the fibrous arrangement, allowing the determination of descriptors of orientation and 3D geometry of the fibers.In a second step, the mechanical behaviour of the fabric under different loading conditions was studied. A protocol has been proposed to characterize the same sample in tension, compression and shear. These tests have complemented existing knowledge on fold biomechanics, and constitute important reference data for the construction and validation of digital models.Finally, based on the data acquired experimentally, a micro-mechanical model was developed. This model has the specificity to take into account the 3D arrangement of the tissue through an idealized but relevant representation of its fibrous microstructure. The macroscopic responses predicted for different loading conditionds could be compared to the experiment for validation. At the microscopic scale, the kinematics of the fibres during the loading could be simulated. The micromechanisms that occur during the deformation of the fibrous network could thus be identified, opening new perspectives in the understanding of the multi-scale properties of the tissue
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Colonna, Stefano. "Etude par absorption X de super-réseaux supraconducteurs et couches minces métalliques." Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10118.
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Dans ce travail nous avons analyse des super-reseaux d'oxydes complexes. Ces nouveaux materiaux presentent un considerable interet tant technologique, lie a la possibilite de controler les caracteristiques structurelles du materiau, que du point de vue de la physique des supraconducteurs a haute temperature de transition. Notamment l'etude implique des structures type infinite layer, (cacuo 2, srcuo 2) et des super-reseaux (bacuo 2) 2/(cacuo 2) n (n=2,3,4) et (bacuo 2) 2/(srcuo 2) 2. Les structures contenant du ca sont tres interessantes etant des supraconducteurs avec des temperatures de transition qui peuvent atteindre 80k a 90k. L'etude conduite au moyen de la spectroscopie d'absorption x a permis d'analyser la structure locale autour des atomes de cuivre, en fournissant des renseignements tres utiles sur le bloc charge reservoir qui dope le plans d'oxyde de cuivre (cuo 2) censes etre responsables de la supraconduction. Parallelement a l'activite experimentale sur les super-reseaux, une chambre a vide dediee aux mesures d'exafs de surface a ete installee et mise au point. Des etudes d'interfaces entre metaux de transition et mgo sont en cours de deroulement. Ce type d'interface presente un nombre considerable d'applications technologiques. En particulier trois differentes interfaces sont le sujet de ces etudes pd/mgo(100), cu/mgo(100) et ag/mgo(100). Des mesures preliminaires de test, faites pendant la mise au point de ce systeme a vide, ont ete presentees.
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Guille, Véronique. "Étude de la structure des solutions asphalténiques et d'un résidu sous vide Safaniya." Nancy 1, 1996. http://www.theses.fr/1996NAN10049.
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Au cours de cette étude, nous avons examiné un Résidu Sous Vide (RSY) Safaniya ainsi que ses différentes fractions (asphaltènes, résines, aromatiques et saturés). Afin de décrire l'équilibre d'agrégation de ces solutions assimilées à des solutions colloïdales, nous avons employé diverses méthodes de caractérisation: la diffusion de rayons X et de neutrons aux petits angles (DXPA et DNPA), la rhéologie et la microscopie électronique à balayage. Nous avons montré que les techniques de diffusion permettent de déterminer une taille et une masse moléculaire moyenne pour les molécules d'asphaltènes et de résines en solution. Ces molécules sont assimilées à des disques polydisperses de 1 nm d'épaisseur et d'environ 10 nm de diamètre. La masse moléculaire moyenne apparente est égale à 106 000 pour les asphaltènes et à 3 300 pour les résines. La diffusion des rayons X est plus sensible à la partie aromatique alors que la diffusion de neutrons permet d'observer la molécule diffusante dans son intégralité. L'étude dans différents solvants permet également d'observer sélectivement différentes régions de l'entité asphalténique. L'ajout de n-heptane provoque une désolvatation de la partie aliphatique puis une agrégation des molécules entraînant une augmentation de la masse moléculaire jusqu'à la floculation. Ces solutions présentent des hétérogénéités à grande échelle dues à des fluctuations de concentration probablement liées à la nature chimique différente des molécules. Ces hétérogénéités sont stables en fonction de la température, traduisant l'existence d'interactions fortes. L'ultracentrifugation permet de fractionner le système en deux classes de molécules de structure chimique différente, plus ou moins aromatique. Chaque fraction ne présente pas d'hétérogénéités en solution alors que leur mélange traduit une forte incompatibilité. La DXPA nous a permis d'obtenir des informations sur le RSV. Nous avons montré la présence de fluctuations de densité à grande échelle stables jusqu'à des températures élevées voisines de 300°C. La rhéologie a permis de montrer l'existence d'interactions donnant lieu à un réseau tridimensionnelWe have examined a Safaniya Vacuum Re sidue (VR) and its fraction s (asphaltenes, resins, aromatics and saturates). Ln order to describe the macrostructure of these cornplex colloidal systems, we used different characterisation techniques : small angle X-ray and neutron scattering (SAXS and SANS), rheology and electron microscopy. Scattering techniques allows us to precise the model for asphaltenes and resins in solution. These macromolecules are polydisperse disk-like particles with thickness and diameter which are respectively close to 1 and 10 nm. The average molecular weight is equal to 106 000 for asphaltenes and 3 300 for resins. We have shown that SAXS is more sensitive to the scattering of the aromatic part of the molecule. Adding n-heptane induces first a desolvation of the molecules and then an aggregation up to f flocculation. These solutions present large heterogeneities due to concentration fluctuations. A huge difference in the chemical composition of the different asphaltene molecules can explain these fluctuations. These heterogeneities are stable as a function of temperature; this means that exist strong molecular interactions. Ultracentrifugation gives two different fractions which contain different chemical structures. More or less aromatic. Solutions, in good solvent, of these two fractions are homogeneous but a mixture of these two fractions exhibits heterogeneities. SAXS gives information about the structure of VR. We have observed the presence of large density fluctuations up to 300°C. Rheological measurements confirm threedimensional organisation
Books on the topic "Structure RX"
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Health promotion and disease prevention programs: Rx for the 1990s? : a complete analysis of market structure, emerging issues, and trends. [Washington, DC]: Corporate Health Policies Group, Inc. and Marketdata Enterprises, 1994.
Find full textBook chapters on the topic "Structure RX"
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Donald, Rakow. "The Role of Nature Rx Programs in the Future of Higher Education." In Nature Rx, 69–76. Cornell University Press, 2019. http://dx.doi.org/10.7591/cornell/9781501715280.003.0006.
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This chapter explores the limitations and barriers to creating Nature Rx programs. Some of these limitations include climate and geography while others include structures of institutions. The chapter concludes with suggestions about how to measure the effectiveness of these programs and the future potential of Nature Rx programs in ameliorating the health and mental health challenges found on campus.
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Aboualalaa, Mohamed, Hala Elsadek, and Ramesh K. Pokharel. "WPT, Recent Techniques for Improving System Efficiency." In Wireless Power Transfer – Recent Development, Applications and New Perspectives. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96003.
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Wireless power transfer (WPT) technologies have received much more attention during the last decade due to their effectiveness in wireless charging for a wide range of electronic devices. To transmit power between two points without a physical link, conventional WPT systems use two coils, one coil is a transmitter (Tx) and the other is a receiver (Rx) which generates an induced current from the received power. Two main factors control the performance of the WPT schemes, power transfer efficiency (PTE) and transmission range. Power transfer efficiency refers to how much power received by the rechargeable device compared to the power transmitted from the transmitter; while transmission range indicates the longest distance between transmitter and receiver at which the receiver can receive power within the acceptable range of power transfer efficiency. Several studies were carried out to improve these two parameters. Many techniques are used for WPT such as inductive coupling, magnetic resonance coupling, and strongly coupled systems. Recently, metamaterial structures are also proposed for further transfer efficiency enhancement. Metamaterials work as an electromagnetic lensing structure that focuses the evanescent transmitted power into receiver direction. Transmitting & Receiving antenna systems may be used for sending power in certain radiation direction. Optimizing the transmitter antenna and receiver antenna characteristics increase the efficiency for WPT systems. This chapter will present a survey on different wireless power transmission schemes.
Conference papers on the topic "Structure RX"
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Fukuda, Shuichi, Shinji Miya, Miho Io, Koichi Hamashita, and Bram Nauta. "Direct-digital modulation (DIDIMO) transmitter with −156dBc/Hz Rx-band noise using FIR structure." In ESSCIRC 2012 - 38th European Solid State Circuits Conference. IEEE, 2012. http://dx.doi.org/10.1109/esscirc.2012.6341254.
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Loseu, Aleh S. "Novel LSAW DMS filter structure for narrow duplex gap SE->Bal RX filter application." In 2010 IEEE Ultrasonics Symposium (IUS). IEEE, 2010. http://dx.doi.org/10.1109/ultsym.2010.5935433.
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Johnson, Gregory M., Christopher D’Aleo, Ziyan Xu, Unoh Kwon, Harvey Berman, Yi Feng, Scott Darling, et al. "Electron Beam Induced Resistance Change for Device Characterization and Defect Localization." In ISTFA 2016. ASM International, 2016. http://dx.doi.org/10.31399/asm.cp.istfa2016p0112.
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Abstract Semiconductor Test Site structures were analyzed using an EBIRCH (Electron Beam Induced Resistance CHange) system. Localization of a RX (active area) to PC (gate) short was achieved with resolution that surpassed that of OBIRCH (Optical Beam Induced Resistance CHange). A voltage breakdown test structure at Metal 1 was stressed in the system, giving isolation to the specific contact. A five-fin diode macro was examined, and it is believed that the electrically active diffusions were imaged as individual fins from Metal 1. A series of ring oscillator devices were examined in steady state condition, and careful consideration of the image supports a hypothesis that Seebeck effect, from heating material interfaces in an EBIRCH system, is the reason for the “dipoles” reported in earlier literature.
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Tilaar, Revy, Asmarafia Asmarafia, Kurniati Kurniati, Ismi Maudilah Hardianti, and Rossi Sanusi. "Development of Surveillance for Stunting in Parigi-Moutong, Central Sulawesi." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.01.18.
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Background: The prevalence of stunting in Parigi-Moutong District (Parimo District) was 33.7% at 10 villages. Stunting prevention effort are structured into a response-surveillance system (SSR) that includes all stages of the natural course of child growth disorders (GPA) to detect (Dx) and provide action (Rx) on the agent-environment (primordial prevention) and the host (primary prevention to rehabilitation). This study aimed to examine the development of a stunting-response surveillance system in Parigi-Moutong District, Central Sulawesi. Subjects and Method: This was a qualitative study conducted at Faculty of Medicine, Public Health and Nursing, Gajah Mada University, Yogyakarta from November 26 to 30. The development of SSR Stunting in Parimo Regency was carried out by means of a Training of Trainer (ToT), the following stages: (1) ToT 1 in the health sector (secondary and tertiary prevention); (2) training in 10 locus villages, sub-districts and districts by trainer from parimo district; (3) establishing ssr stunting; (4) ToT 2 across sector (primordial prevention, primary prevention and rehabilitation); (5) training throughout parimo district; and, (6) establishing the sr system for priority diseases. Results: SSR officers are able to train Individual Health Effort (UKP) officers, Information technology (IT) officers, Surveillance-Response (SR) officers Conclusion: SSR follows the WHO SSR pattern which consists of four components: (1) Main functions; (2) Supporting functions; (3) Structure; and, (4) quality criteria. Keywords: stunting, SSR, surveillance Correspondence: Rossi Sanusi. Faculty of Medicine, Universitas Gadjah Mada. l. Farmako, Senolowo, Sekip Utara, Depok, Sleman, Daerah Istimewa Yogyakarta 55281. DOI: https://doi.org/10.26911/the7thicph.01.18
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von Hoyningen-Huene, Johannes, Helmut Grießer, Michael Eiselt, Christian Ruprecht, and Werner Rosenkranz. "Comparison of Rx-DSP-Structures in Experimental OFDMA-PON Uplink Transmission System." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/ofc.2014.tu2f.4.
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