3,549 research outputs found
The North is another country. by Nicolas Rothwell
No full texttag=1 data=The North is another country. by Nicolas Rothwell
tag=2 data=Rothwell, Nicolas
tag=3 data=Australian Magazine,
tag=6 data=16/17 November 1996
tag=7 data=20-33.
tag=8 data=NT%TOURISM
tag=10 data=Worse, better, stranger, wilder, but above all different from the rest of the country. Continuing his journey of discovery across Australia's Top half the author stops over in Darwin to hear all the truths and whispers about the North.
tag=11 data=1996/2/8
tag=12 data=96/0316
tag=13 data=CABWorse, better, stranger, wilder, but above all different from the rest of the country. Continuing his journey of discovery across Australia's Top half the author stops over in Darwin to hear all the truths and whispers about the North
Huge reduction of wake-up effect in ferroelectric HfZrO2 nanostructures
No full textInternational audienceWe report the fabrication of two samples deposited by magnetron sputtering with excellent performances, quite similar to samples deposited by ALD. The samples are called NM, and M. NM and M refers to two different architectures, respectively non-mesa and mesa structures. Fabrication and architecture details can be found in reference [1]. The set-up for electrical measurements have been described in reference [2, 3]. This set-up allows us to wake the samples with bipolar square pulses. Measurements are performed with a positive up negative down (PUND) sequence. Pr values are among the highest for samples deposited by sputtering. Although the N-sample and NM-samples show very close Pr values, the two samples show completely different electrical behaviors. During cycling, the increase of Pr value for the NM-sample is more than an order of magnitude higher than the M-sample. It is accompanied by a decrease of the endurance which is two order of magnitude higher for the NM-sample than for the M-sample. As electrical behaviors are not the same, for low stress conditions M-sample has a higher Pr value during cycling whereas for high stress conditions NM-sample has a higher Pr value during cycling. As a matter of fact, it has been proven that maximum Pr values are more sensitive to stress conditions than the structures themselves. The origins of the different electrical behaviors come from the micro-crystalline structures of the two samples, according to GIXRD results. The crystallization takes place during the annealing step. During annealing, M-sample is built with a TiN TE fully covering the HZO layer whereas the TiN covers only partially the HZO layer in case of the NM-sample. It induces different stress states which lead to two different micro-crystalline patterning. The M-sample shows no monoclinic peak, whereas the NM-sample shows many monoclinic orientations. It can explain the huge reduction of the wake-up effect. [1] J. Bouaziz, P.R. Romeo, N. Baboux, B. Vilquin, ACS Appl. Electron. Mater. 1, 1740 (2019). [2] J. Bouaziz, P. Rojo Romeo, N. Baboux, R. Negrea, L. Pintilie, B. Vilquin, APL Mater. 7, 081109 (2019). [3] J. Bouaziz, P.R. Romeo, N. Baboux, B. Vilquin, Appl. Phys.Lett. 118, 082901 (2021)
Huge reduction of wake-up effect in ferroelectric HfZrO2 nanostructures
No full textInternational audienceWe report the fabrication of two samples deposited by magnetron sputtering with excellent performances, quite similar to samples deposited by ALD. The samples are called NM, and M. NM and M refers to two different architectures, respectively non-mesa and mesa structures. Fabrication and architecture details can be found in reference [1]. The set-up for electrical measurements have been described in reference [2, 3]. This set-up allows us to wake the samples with bipolar square pulses. Measurements are performed with a positive up negative down (PUND) sequence. Pr values are among the highest for samples deposited by sputtering. Although the N-sample and NM-samples show very close Pr values, the two samples show completely different electrical behaviors. During cycling, the increase of Pr value for the NM-sample is more than an order of magnitude higher than the M-sample. It is accompanied by a decrease of the endurance which is two order of magnitude higher for the NM-sample than for the M-sample. As electrical behaviors are not the same, for low stress conditions M-sample has a higher Pr value during cycling whereas for high stress conditions NM-sample has a higher Pr value during cycling. As a matter of fact, it has been proven that maximum Pr values are more sensitive to stress conditions than the structures themselves. The origins of the different electrical behaviors come from the micro-crystalline structures of the two samples, according to GIXRD results. The crystallization takes place during the annealing step. During annealing, M-sample is built with a TiN TE fully covering the HZO layer whereas the TiN covers only partially the HZO layer in case of the NM-sample. It induces different stress states which lead to two different micro-crystalline patterning. The M-sample shows no monoclinic peak, whereas the NM-sample shows many monoclinic orientations. It can explain the huge reduction of the wake-up effect. [1] J. Bouaziz, P.R. Romeo, N. Baboux, B. Vilquin, ACS Appl. Electron. Mater. 1, 1740 (2019). [2] J. Bouaziz, P. Rojo Romeo, N. Baboux, R. Negrea, L. Pintilie, B. Vilquin, APL Mater. 7, 081109 (2019). [3] J. Bouaziz, P.R. Romeo, N. Baboux, B. Vilquin, Appl. Phys.Lett. 118, 082901 (2021)
Grace S. Fong, Herself an Author : Gender, Agency, and Writing in Late Imperial China, 2008
No full textZufferey Nicolas. Grace S. Fong, Herself an Author : Gender, Agency, and Writing in Late Imperial China, 2008. In: Études chinoises, n°28, 2009. Numéro spécial sur le droit chinois. pp. 243-247
New Necklaces: 400 Designs in Contemporary Jewellery
No full textAfter the successful New Rings and New Earrings, New Necklaces is the third book curated by jeweller and author Nicolas Estrada, from classic forms and materials to the most daring, experimental and surprising ideas, each of the 500 necklaces included in this book has something that makes it unique and relates strongly to today's social, cultural and artistic reality. With prefaces by German jeweller Julia Wild and Leo Caballero, owner of the Barcelona gallery Klimt 02, specialised in contemporary jewellers
Highly transparent low capacitance plasma enhanced atomic layer deposition Al2O3-HfO2 tunnel junction engineering
No full textThe development of metallic single electron transistor (SET) depends on the downscaling and the electrical properties of its tunnel junctions. These tunnel junctions should insure high tunnel current levels, low thermionic current, and low capacitance. The authors use atomic layer deposition to fabricate Al2O3 and HfO2 thin layers. Tunnel barrier engineering allows the achievement of low capacitance Al2O3 and HfO2 tunnel junctions using optimized annealing and plasma exposure conditions. Different stacks were designed and fabricated to increase the transparency of the tunnel junction while minimizing thermionic current. This tunnel junction is meant to be integrated in SET to enhance its electrical properties (e.g., operating temperature, I ON/I OFF ratio)
How Did I Get to Princess Margaret? (And How Did I Get Her to the World Wide Web?)
No full textThe paper explores the growing use of
tools from the arts and humanities for investigation
and dissemination of social science research.
Emerging spaces for knowledge transfer, such as
the World Wide Web, are explored as outlets for
"performative social science". Questions of ethnics
and questions of evaluation which emerge from
performative social science and the use of new
technologies are discussed. Contemporary thinking
in aesthetics is explored to answer questions
of evaluation. The use of the Internet for productions
is proposed as supporting the collective
elaboration of meaning supported by Relational
Aesthetics.
One solution to the ethical problem of performing
the narrations of others is the use of the writer's
own story as autoethnography. The author queries
autoethnography's tendency to tell "sad" stories and
proposes an amusing story, exemplified by "The
One about Princess Margaret" (see Appendix).
The conclusion is reached that the free and open
environment of the Internet sidelines the usual
tediousness of academic publishing and begins to
explore new answers to questions posed about
the evaluation and ethics of performative social
science
Identification of author profiles through social networks
No full textThe aim of this paper is to compile dictionaries of slang words, abbreviations, contractions, and emoticons to help the pre-processing of texts published in social networks. The use of these dictionaries is intended to improve the results of the tasks related to data obtained from these platforms. Therefore, a hypothesis was evaluated in the task of identifying author profiles (author profiling).Silva, JesúsMaria Santodomingo, Nicolas EliasRomero, LigiaJorge, MarisolHerrera, MaritzaPineda Lezama, Omar Bonerg
Nikolski de Nicolas Dickner. - américanité, archéologie, intertextualité
No full textAuthor treats different dimensions of space in Nicolas Dickner's novel Nikolski. He analyses the way in which the novel ties links between space and family and, furthermore, outlines the role stratification plays in the novel
Epitaxia! pyroelectric oxide thin films on Si for thermal energy harvesting
No full textLes systèmes de récupération d'énergie sont prometteurs pour l'auto-alimentation des dispositifs intégrés. Les matériaux pyroélectriques couplant un changement de température à un changement de polarisation électrique peuvent être utilisés pour la conversion de l'énergie thermique en énergie électrique sans nécessité de maintien de gradients thermiques qui constitue un inconvénient majeur dans les modules thermoélectriques compacts. Dans cette thèse, le PbZro.52Tio.48O3 (PZT) et le BaxSr1-xTiUO3 (x = l et x = 0.7) à fort coefficients pyroélectriques, sont choisis, élaborés en couches minces épitaxiées, caractérisés pour étudier leur potentiel de récupération d'énergie thermique. Ce travail comporte deux aspects : le premier consiste au développement et l'optimisation des conditions de croissance des hétérostructures intégrées et épitaxiées sur silicium. Le deuxième est focalisé sur l'étude des propriétés fonctionnelles (ferroélectriques, diélectriques et pyroélectriques) et à l' estimation du pouvoir de récupération d'énergie principalement des couches de PZT. Une corrélation entre ces deux aspects est ainsi présente. Un changement de la structure cristalline est montré sur les empilements intégrés sur Si, en comparaison avec des structures équivalentes réalisées sur substrat de STO. L'impact de ceci a été directement constaté sur les propriétés fonctionnelles des couches hétéroépitaxiées de PZT. Ainsi une anisotropie importante de ces propriétés a pu être mise en évidence, en complétant cette étude par des mesures dans le plan a l'aide de peignes interdigités. Ces observations ont été cohérentes avec les mesures de la diffraction des rayons X en fonction de la température. Par ailleurs, les différentes méthodes et configurations de mesures du coefficient pyroélectrique sur PZT ont permis une meilleure compréhension du phénomène et la distinction des diverses contributions existantes. La mesure statique indirecte issue de la variation de la polarisation rémanente en fonction de la température renseigne sur l'effet pyroélectrique intrinsèque (et secondaire). Cependant les mesures dynamiques du courant pyroélectrique pendant un changement de la température contiennent toutes les contributions pyroélectriques et non pyroélectriques, comme les effets extrinsèques et le courant de relaxation. Des mesures pyroélectriques dynamiques sous champ électrique, se rapprochant des conditions de cycles de récupération d'énergie thermique, ont permis de montrer que des courants de conduction apparaissaient même pour des bonnes couches de PZT diélectriques épaisses. Ces courants masquent les courants pyroélectriques et rendent l'application de générateur électrique par cycles thermodynamiques sous champ électrique rédhibitoire. Des composants passifs n'utilisant pas ou peu de champs électriques tels que des capteurs devront plutôt être envisagées.Due to the wasted heat in ever more compact microelectronic devices, the harvesting of thermal energy has become interesting for self-powering small devices. Consequently, pyroelectric materials witch couple a change in temperature to a change in electrical polarization may be used for the conversion of the thermal energy to an electric energy without necessity of maintaining thermal gradients that is a main drawback in compact devices with thermoelectric materials. In this thesis, PbZro.52Tio.48O3 (PZT) and BaxSr1-xTiUO3 (x = l and x = 0.7), with high pyroelectric coefficients are chosen, elaborated in thin epitaxial layers, characterized structurally and electrically to study their potential for thermal energy harvesting. This work has two aspects: the first consists in the development and optimization of the growth conditions of epitaxial heterostructures integrated on Si. The second one focuses on the study of the functional properties ( ferroelectric, dielectric and pyroelectric) and the estimation of the energy harvesting efficiency mainly of PZT layers. A correlation between these two aspects is then done. A change in the crystal structure is shown on the Si-integrated stacks in comparison with equivalent structures grown on STO substrate. This structural behavior impacts directly the functional properties of the heteroepitaxial layers of PZT. Th us, an important anisotropy of these properties was demonstrated and completed by a study of the in plane properties using measurements by interdigital capacitors. These observations were consistent with measurements of X - ray diffraction as a function of temperature. Otherwise, different methods and configurations of pyroelectric coefficient measurements on PZT have allowed a better understanding of the phenomenon and the distinction of the various existing contributions. The indirect static measurement resulting from the variation of the remnant polarization as a function of the temperature gives the intrinsic (and secondary) pyroelectric contributions. However, the dynamic measurements of the pyroelectric current during a change of the temperature contain all the pyroelectric and non-pyroelectric contributions, such as the extrinsic effects and the relaxation current . Dynamic pyroelectric measurements under an electric field are near to the conditions of thermal energy harvesting cycles. Conduction currents appeared, even for good layers of thick dielectric PZT, and mask the pyroelectric currents. This makes the application of electric generator by thermodynamic cycles under electric field prohibitive. Passive components using low or no electrical field such as sensors should be considered
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