47,459 research outputs found
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
Tetragonal to triclinic structural transition in the prototypical CeScSi induced by a two-step magnetic ordering: a temperature-dependent neutron diffraction study of CeScSi, CeScGe and LaScSi
No full textAn investigation on the ground state magnetism of CeScSi, CeScGe (tetragonal CeScSi-type, tI12, space group I4/mmm) by temperature-dependent powder neutron diffraction has been carried out, as debated and controversial data regarding the low temperature magnetic behaviours of these two compounds were reported. Our studies reveal that, while cooling, long-range magnetic ordering in CeScSi and CeScGe takes place by a two-step process. A first transition leads to a magnetic structure with the Ce moments aligned ferromagnetically onto two neighbouring tetragonal basal a-b planes of the CeScSi-type structure; the double layers are then antiferromagnetically coupled to each other along the c-axis. The transition temperature associated with the first ordering is T N ~ 26 K and T N ~ 48 K for the silicide and the germanide, respectively. Here the spin directions are rigorously confined to the basal plane, with values of the Ce magnetic moments of μ Ce = 0.8-1.0 μ B. A second magnetic transition, which takes place at slightly lower temperatures, results in a canting of the ordered magnetic moments out of the basal plane which is accompanied by an increase of the magnetic moment value of Ce to μ Ce = 1.4-1.5 μ B. Interestingly, the second magnetic transition leads to a structural distortion in both compounds from the higher-symmetry tetragonal space group I4/mmm to the lower-symmetry and triclinic I-1 (non-standard triclinic). Magnetic symmetry analysis shows that the canted structure would not be allowed in the I4/mmm space group; this result further confirms the structural transition. The transition temperatures T S from I4/mmm to I-1 are about 22 K in CeScSi and 36 K in CeScGe, i.e. well below the temperature of the first onset of antiferromagnetic order observed in this work (or below the ordering temperature, previously reported as either T C or T N). This result, along with the synchronism of the magnetic and structural transitions, suggests a magnetostructural origin of this structural distortion. We have also carried out powder neutron diffraction for LaScSi as a non-magnetically-ordering reference compound and compared the results with those of CeScSi and CeScGe compounds
Deposition of crystalline C–N film by arc evaporation process
No full textCrystalline carbon nitride thin films were deposited by Arc evaporation process. The room temperature deposited films showed amorphous and polycrystalline phases whereas, the films were crystalline, when deposited at 300 °C. These films were nano-crystalline and had grain sizes varying from 5 to 30 nm depending on the deposition condition. The average C : N at.% ratio for films deposited at 300 °C substrate temperature was found as C : N :: 39.37 : 59.87. The microhardness of the deposited films were in the range of 2200Hv.015 to 1800Hv.015
Enhanced photocatalytic degradation of organic pollutants in water by g-C3N4/N-TiO2/Y1.97SiO5:Ce0.03 heterostructure
No full textA novel ternary heterostructure based on g-C3N4/N-TiO2/Y1.97SiO5:Ce-0.03 was synthesized via thermal treatment and evaluated for the photocatalytic degradation of two antibiotic pollutants, chloramphenicol (CAP) and vancomycin (VAN), in aqueous solution. The composite was designed to function as a photoactive platform, in which Ce3+-doped Y2SiO5 acts as an internal light converter, emitting at similar to 430 nm upon UV excitation (365 nm) to enhance activation of the g-C3N4/N-TiO2 interface. Structural and morphological characterizations (WAXD, FTIR, XPS, TEM) confirmed the formation of a well-integrated heterostructure with strong interfacial interactions. The photocatalyst achieved near-complete removal of CAP (99.7 %) and VAN (100 %) under UV light, and also showed high efficiency under simulated solar irradiation and in real water matrices. These results demonstrate the synergistic light-conversion and charge-transfer properties of the composite, underscoring its potential as a sustainable and scalable solution for antibiotic pollutant removal in water treatment applications
Obesity and the risk of incident, post-operative, and post-ablation atrial fibrillation: a meta-analysis of 626,603 individuals in 51 studies
No full textAbstract not availableChristopher X. Wong, Thomas Sullivan, Michelle T. Sun, Rajiv Mahajan, Rajeev K. Pathak, Melissa Middeldorp, Darragh Twomey, Anand N. Ganesan, Geetanjali Rangnekar, Kurt C. Roberts-Thomson, Dennis H. Lau, Prashanthan Sander
Fast implementation of iterative adaptive approach for wideband unambiguous radar detection
No full textAccepted author manuscriptMicrowave Sensing, Signals & System
Underuse and overuse of anticoagulation for atrial fibrillation: a study in Indigenous and non-Indigenous Australians
No full textAbstract not availableChristopher X. Wong, Sarah W. Lee, Siang Wei Gan, Rajiv Mahajan, Geetanjali Rangnekar, Rajeev K. Pathak, Darragh Twomey, Carlee Schultz, Anand N. Ganesan, Anthony G. Brooks, Kurt C. Roberts-Thomson, Alex Brown, Dennis H.Lau, Prashanthan Sander
The importance of chain conformational mobility during 5-exo-cyclizations of C-, N- and O-centred radicals
No full textThe author thanks the EPSRC (grant EP/I003479/1) and EaStCHEM for funding.The reaction coordinates of an archetypical set of 5-exo cyclizations of C-, N- and O-centred radicals were investigated by computational methods. G4 theory, and DFT with the um062x functional, were able to rationalise counterintuitive factors such as the 'normal' order of rate constants being: N-centredPeer reviewe
Fixed and coincidence points of hybrid mappings
No full textsummary:The purpose of this note is to provide a substantial improvement and appreciable generalizations of recent results of Beg and Azam; Pathak, Kang and Cho; Shiau, Tan and Wong; Singh and Mishra
Dissipative Range Scaling of Higher Order Structure Functions for Velocity and Passive Scalars
No full textDifferently to Kolmogorov's second similarity hypothesis, we find that the 2n-th order velocity and scalar structure functions scale with n-th order moment of the energy dissipation and the scalar dissipation, respectively. The origins of this scaling are analyzed by the transport equations of the fourth order velocity and scalar increment moments and by direct numerical simulations
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