1,240 research outputs found
Embedded real-time software techniques to handle misfunctioning due to electromagnetic fields
No full textInternational audienceBrief bibliographical information : The team EMC of LESIA/INSA works on emission and susceptibility of electronic systems in cooperation with numerous firms from several domains including avionics (EADS) and automotive (Motorola, Siemens VDO). The team is a co-author of the standard IEC 62014-3, the organizer of the international conference EMC Compo and participates to the European projects MESDIE and LIMA
SO2 and SO3 reactions with [(C5Me5)(2)Sm-O-Sm (C5Me5)(2)]: a DFT investigation and comparison with CO2 reactivity
No full textbibtex: ISI:000403968300003 bibtex\location:'THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND',publisher:'ROYAL SOC CHEMISTRY',type:'Article',affiliation:'Maron, L (Reprint Author), Univ Toulouse, LPCNO, CNRS, INSA,UPS, 135 Ave Rangueil, F-31077 Toulouse, France. Louyriac, Elisa; Maron, Laurent, Univ Toulouse, LPCNO, CNRS, INSA,UPS, 135 Ave Rangueil, F-31077 Toulouse, France. Roesky, Peter W., KIT, Inst Inorgan Chem, Engesserstr 15, D-76131 Karlsruhe, Germany.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'EY4SR',eissn:'1477-9234','journal-iso':'Dalton Trans.','keywords-plus':'CRYSTALLOGRAPHIC CHARACTERIZATION; SULFINATE COMPLEXES; ACTIVATION; OXO; LANTHANIDE; DITHIONITE; MECHANISM; DIOXIDE','number-of-cited-references':'20','research-areas':'Chemistry','times-cited':'3','unique-id':'ISI:000403968300003','usage-count-last-180-days':'3','usage-count-since-2013':'10','web-of-science-categories':'Chemistry, Inorganic & Nuclear'\International audienceRecently, it was shown that samarocene oxide [Cp*2SmO-SmCp*(2)] with Cp* = C5Me5 could react with organic and inorganic anhydrides. The reactions of [Cp*Sm-2-O-SmCp*(2)] with SO2 and SO3 are reported using DFT calculations and compared with the reactivity of CO2. These reactions exhibit similar features yielding [Cp*(2)-Sm-(mu-eta(1):eta(2)-OSO2)-SmCp*2] similar to [Cp*(2)-Sm(mu-eta(1):eta(2)-OCO2)-SmCp*(2)] and [Cp*(2)-Sm-(mu-eta(2):eta(2)-O2SO2)-SmCp*(2)] complexes
Synthesis and Reactivity of a Scandium Terminal Hydride: H-2 Activation by a Scandium Terminal Imido Complex
No full textbibtex: ISI:000413337400008 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Chen, YF (Reprint Author), Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, L (Reprint Author), Univ Paul Sabatier, CNRS, LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France. Han, Xianghao; Xiang, Li; Mao, Weiqing; Lu, Erli; Leng, Xuebing; Chen, Yaofeng, Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Lamsfus, Carlos A.; Maron, Laurent, Univ Paul Sabatier, CNRS, LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France. Lamsfus, Carlos A.; Maron, Laurent, Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'FK2UF',eissn:'1521-3765','funding-acknowledgement':'National Natural Science Foundation of China [21325210, 21421091]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]','funding-text':'This work was supported by the National Natural Science Foundation of China (Grant Nos. 21325210 and 21421091), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB20000000). L.M. is member of the Institut Universitaire de France. The Humboldt Foundation, the Chinese Scholarship Council, and the Chinese Academy of Science are also acknowledged as well as CalMip for computing time.','journal-iso':'Chem.-Eur. J.','keywords-plus':'C-H ACTIVATION; RARE-EARTH COMPLEXES; BOND ACTIVATION; BASE-FREE; LIGAND; HYDROGEN; CYCLOADDITION; DIHYDROGEN; DERIVATIVES; ALKYLIDENE','number-of-cited-references':'56','orcid-numbers':'Alvarez Lamsfus, Carlos/0000-0002-4442-7052','research-areas':'Chemistry','times-cited':'2','unique-id':'ISI:000413337400008','usage-count-last-180-days':'1','usage-count-since-2013':'21','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceDihydrogen is easily activated by a scandium terminal imido complex containing the weakly coordinated THF. The reaction proceeds through a 1,2-addition mechanism, which is distinct from the sigma-bond metathesis mechanism reported to date for rare-earth metal-mediated H-2 activation. This reaction yields a scandium terminal hydride, which is structurally well-characterized, being the first one to date. The reactivity of this hydride is reported with unsaturated substrates, further shedding light on the existence of the terminal hydride complex. Interestingly, the H-2 activation can be reversible. DFT investigations further eludciate the mechanistic aspects of the reactivity of the scandium anilido-terminal hydride complex with PhNCS but also on the reversible H-2 activation process
Samarium-Catalyzed Diastereoselective Double Addition of Phenylphosphine to Imines and Mechanistic Studies by DFT Calculations
No full textbibtex: ISI:000400097100003 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Cui, CM (Reprint Author), Nankai Univ, State Key Lab Elementoorgan Chem, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China. Maron, L (Reprint Author), Univ Toulouse, LPCNO, CNRS, INSA,UPS,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France. Li, Jianfeng; Song, Changhong; Liu, Jinxi; Fan, Guilan; Cui, Chunming, Nankai Univ, State Key Lab Elementoorgan Chem, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China. Lamsfus, Carlos Alvarez; Maron, Laurent, Univ Toulouse, LPCNO, CNRS, INSA,UPS,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'ET2JI',eissn:'1867-3899','funding-acknowledgement':'National Natural Science Foundation of China [21390401]; Humboldt Foundation; Chinese Academy of Sciences','funding-text':'We are grateful to the National Natural Science Foundation of China (21390401) for financial support. L.M. is a member of the Institut Universitaire de France. The Humboldt Foundation and the Chinese Academy of Sciences are acknowledged for financial support of this work. L.M. and C.A.L. are grateful to CalMip for the generous grant of computing time.','journal-iso':'ChemCatChem','keywords-plus':'H BOND ADDITION; AMINOPHOSPHINE LIGANDS; ASYMMETRIC ADDITION; CHIRAL 3,4-DIAZAPHOSPHOLANES; ALPHA-AMINOPHOSPHINES; EFFICIENT SYNTHESIS; METAL-COMPLEXES; HYDROPHOSPHINATION; ALKENES; CARBODIIMIDES','number-of-cited-references':'48','orcid-numbers':'Alvarez Lamsfus, Carlos/0000-0002-4442-7052','research-areas':'Chemistry','times-cited':'2','unique-id':'ISI:000400097100003','usage-count-last-180-days':'4','usage-count-since-2013':'13','web-of-science-categories':'Chemistry, Physical'\International audienceThe catalytic hydrophosphination of imines represents the most straightforward and atom-economical strategy for the preparation of alpha-aminophosphines, which are useful as biologically active molecules and ligands for catalysis. The first catalytic protocol for the rapid and high-yielding hydrophosphination of common imines enabled by an ene-diamido samarium methoxide catalyst was developed. The reaction allowed the efficient and diastereoselective synthesis of various bis(alpha-amino)phosphines through the double addition of PhPH2 to common imines. The catalytic reaction has a relatively wide substrate scope and offers high diastereoselectivities (up to 99: 1 dr for meso products) and high yields (up to 97%). DFT calculations disclosed an inner-sphere mechanism involving unprecedented activation of a Sm-O bond by a phosphine and stabilization of the addition intermediates by the metal center
Nonchelated Phosphoniomethylidene Complexes of Scandium and Lutetium
No full textbibtex: ISI:000418204600015 bibtex\location:'1155 16TH ST, NW, WASHINGTON, DC 20036 USA',publisher:'AMER CHEMICAL SOC',type:'Article',affiliation:'Chen, YF (Reprint Author), Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Chinese Acad Sci, State Key Lab Organomet Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, L (Reprint Author), Univ Paul Sabatier, LPCNO, CNRS, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France. Mao, Weiqing; Xiang, Li; Leng, Xuebing; Chen, Yaofeng, Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Chinese Acad Sci, State Key Lab Organomet Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, Laurent, Univ Paul Sabatier, LPCNO, CNRS, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, Laurent, Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'FQ2RI','funding-acknowledgement':'National Natural Science Foundation of China [21325210, 21421091, 21732007]; Chinese Academy of Sciences [XDB20000000]','funding-text':'This work was supported by the National Natural Science Foundation of China (Grant Nos. 21325210, 21421091, and 21732007) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB20000000).','journal-iso':'J. Am. Chem. Soc.','keywords-plus':'METAL METHYLIDENE COMPLEXES; CARBON MULTIPLE BOND; ALKYLIDENE COMPLEXES; METATHESIS REACTIONS; CARBENE COMPLEXES; NOBEL LECTURE; REACTIVITY; ACTIVATION; TANTALUM; CRYSTAL','number-of-cited-references':'38','research-areas':'Chemistry','times-cited':'7','unique-id':'ISI:000418204600015','usage-count-last-180-days':'9','usage-count-since-2013':'22','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceThe first phosphoniomethylidene complexes of scandium and lutetium, [LLn(CHPPh3)X] (L = [MeC(NDIPP)CHC(NDIPP)Me](-); Ln = Sc, X = Me, I, TfO; Ln = Lu, X = CH2SiMe3), have been synthesized and fully characterized. DFT calculations clearly demonstrate the presence of an allylic Ln, C, P pi-type interaction in these complexes. X-ray diffraction indicates that the scandium iodide complex has the shortest Sc-C bond length to date (2.044(5)angstrom). These phosphoniomethylidene complexes readily convert into the ylide complexes, and the reactivity is affected by both X- anion and Ln(3+) ion. The reaction of lutetium complex with imine shows a rapid insertion of imine into the Lu-C(alkylidene) bond. DFT calculations indicate that, although the bonding situation seems similar to that of the scandium analog, the strong negative charge at the alkylidene carbon is not sufficiently screened by one hydrogen in the lutetium complex because of a more ionic bonding, and therefore, the reactivity of the lutetium complex is much higher
Insa Sané, the word-DJ:Using Hip Hop Composition Techniques to Celebrate Plural Cultural Identities
No full textInsa Sané is a French children’s and YA author of Senegalese descent. Before writing for young people, he performed as a rapper and a slam poet. I propose to show how this musicalbackground deeply influences his literary work. Not only does Sané write about topics like street violence, drugs, and racism, that are often dealt with in hip hop music, but his whole way of writing also bears the traces of hip hop musicality. I plan to first highlight those traces through narratological analysis, showing how the structures of some of Sané’s novelsimitate typical structures of songs. I will then bring to light the influence of hip hop through intertextual analysis, showing that Sané’s massive integration of quotes and his particularuse of them is close to sampling, an essential technique in hip hop music. In Sané’s work, the sampling technique does not only serve the musicality of his literary work, the eclecticchoice of the ‘samples’ of quotes (from French rap, African-American soul, American TV series, African aphorisms and classical French poems) is also a way to celebrate plural cultural identities and to specifically address young readers who share Sané’s cultural references. I will mobilize discourse analysis and Alain Montandon’s notion of sociopoetics (so-ciopoétique) to show this last point, that also resonates with postcolonial writings
Highlights of Library Automation related documents in the INSPEC
No full textThe paper has attempted to analyse the Library Automation related records in the INSPEC (1969 to July 2004). The growth of Library Automation related literature, country of input, scattering of literature in different publication types, core journals publishing Library Automation related publications, language-wise proportion of the literature, content analysis through keywords/descriptors, availability of URLs (Universal Resource Locator) for full text articles as alternative locations were the main focus of the study. After the year 1984, the literature grows approximately linearly with a growth rate of about 600 items per year. The USA is the predominant publishing country of Library Automation related literature. Journals are the most preferred publication media, followed by Conference/Proceedings-Papers, Book-Chapters, and Reports publications. Most productive journals are: Library Hi Tech, followed by Computers in Libraries, VINE, Information Technology and Libraries, and Program. English articles constitute 91.83% of the total literature. That means the non-English articles constitute only 8.17%. The keyword analysis indicates that the key areas of Library Automation were cataloguing; academic-libraries; information-retrieval; Internet; and information-services. The most occurred URL was http://www.dlib.org/ as alternative locations in the availability notes of Library Automation related records
Asymptotic domain decomposition and a posteriori estimates for a semi linear problem.
No full textInternational audienceKeywords: Method of asymptotic partial domain decomposition; a posteriori error estimates; Indicator of the error; semi linear elliptic equations. 2010 Mathematics Subject Classification: 35F40; 65 1 Introduction The method of asymptotic partial decomposition of a domain (MAPDD) originates with the works of G.Panasenko Panasenko (2005). The idea is to replace an original 3D or 2D problem by an hybrid one 3D − 1D; or 2D − 1D where the dimension of the problem decreases in part of the domain. The location of the junction between the heterogenous problems is asymptotically estimated in the works of G.Panasenko mainly for linear problems. Nevertheless for numerical simulations it is essential to detect with accuracy the location of the junction. Let us also mention the interest of locating with accuracy the position of the junction in blood flows simulations when different nonlinear mathematical models are used Quarteroni and Veneziani (2003), or in fluid/solid problems for which subproblems *Corresponding author: Tel:+91-9741148002, E-mail: [email protected] Research Article Coupling heterogeneous mathematical models is today commonly used, and effective solution methods for the resulting hybrid problem have recently become available for several systems. Even if in certain circumstances, asymptotic evaluations of the location of the interfaces are available, no strategy are proposed for locating the interfaces in numerical simulations. In this article, a semi- linear elliptic problem is considered. By reformulating the problem in a mixed formulation context and by using an a posteriori error estimate, we propose an indicator of the error due to a wrong position of the junction. Minimizing this indicator allows us to determine accurately the location of the junction. By comparing this indicator with a mesh error indicator, this allows to decide if it is better to refine the mesh or to move the interface. Some numerical results are presented showing the efficiency of the proposed indicator
Insa Sané, the word-DJ:Using Hip Hop Composition Techniques to Celebrate Plural Cultural Identities
No full textInsa Sané is a French children’s and YA author of Senegalese descent. Before writing for young people, he performed as a rapper and a slam poet. I propose to show how this musicalbackground deeply influences his literary work. Not only does Sané write about topics like street violence, drugs, and racism, that are often dealt with in hip hop music, but his whole way of writing also bears the traces of hip hop musicality. I plan to first highlight those traces through narratological analysis, showing how the structures of some of Sané’s novelsimitate typical structures of songs. I will then bring to light the influence of hip hop through intertextual analysis, showing that Sané’s massive integration of quotes and his particularuse of them is close to sampling, an essential technique in hip hop music. In Sané’s work, the sampling technique does not only serve the musicality of his literary work, the eclecticchoice of the ‘samples’ of quotes (from French rap, African-American soul, American TV series, African aphorisms and classical French poems) is also a way to celebrate plural cultural identities and to specifically address young readers who share Sané’s cultural references. I will mobilize discourse analysis and Alain Montandon’s notion of sociopoetics (so-ciopoétique) to show this last point, that also resonates with postcolonial writings
Modelling energy consumption in diesel multiple units
No full text[EN] This study presents a train simulation tool for the evaluation of a train journey and its energy consumption.
The simulation tool consists of a train motion model and an energy consumption model, specifically developed for a
diesel multiple unit. The underlying equations are numerically solved following the finite difference method. The models¿
performances are tested against a set of measured data including fuel consumption and speed profiles from real
operation services. The results yield adjustment errors below 9% in all simulations, including simplified route profiles.
The consideration of wind speed and direction further contributes to improve speed adjustment by 1.5% in those
stretches where such variables are taken into account. Hence, the simulation tool can be used to predict the travel
time and fuel consumption in any potential railway service even at an early stage design.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Project Funded by the Spanish Ministry of Economy and Competitiveness, Ref. TRA 2011-26602.Salvador Zuriaga, P.; Martínez Fernández, P.; Villalba Sanchis, I.; Insa Franco, R. (2017). Modelling energy consumption in diesel multiple units. Proceedings of the Institution of Mechanical Engineers. Part F, Journal of rail and rapid transit (Online). 232(5):1-10. https://doi.org/10.1177/0954409717737226S110232
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