121,916 research outputs found
Corrosion inhibition studies of N,N '-bis(4-formylphenol)-1,2-Diaminocyclohexane on steel in 1 HCl solution acid
No full textThe inhibition ability of N,N'-bis(4-formylphenol)-1,2-Diaminocyclohexane (4-HCD) on the carbon steel in 1 M hydrochloric acid solution was studied by electrochemical techniques and weight loss measurements. 4-HCD inhibited steel corrosion in I M HCI solution significantly and the inhibition efficiency increased with 4-HCD concentration. The results indicated that after 5 h, this inhibitor has a maximum percentage inhibition efficiency of approximately 71% in the presence of 2 mM inhibitor. The adsorption of the inhibitor was followed Langmuir adsorption isotherm with the standard adsorption free energy of -25.66 kJ mol(-1). Computational investigations of the studied inhibitor are performed by using HF method with 6-31++G(d,p) and 6-311++G(d,p) basis sets. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.Office of Vice Chancellor of Research; office of scientific research projects of Cumhuriyet University [F-429]The authors wish to acknowledge the financial support of the Office of Vice Chancellor of Research of their corresponding universities. We are grateful the office of scientific research projects of Cumhuriyet University (Project No.: F-429) for financial supports. The numerical calculations reported in this paper are performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA Resources)
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
An asymmetric pericyclic cascade approach to 3-alkyl-3-aryloxindoles : generality, applications and mechanistic investigations
No full textThe authors thank the Royal Society for a URF (ADS), Cancer Research UK (ER), the Leverhulme Trust (ND) and EPSRC (KBL) for funding. We are also grateful to the National Science Foundation (USA) for financial support of the research at UCLA (KNH).The reaction of L-serine derived N-arylnitrones with alkylarylketenes generates asymmetric 3-alkyl-3-aryloxindoles in good to excellent yields (up to 93%) and excellent enantioselectivity (up to 98% ee) via a pericyclic cascade process. The optimization, scope and applications of this transformation are reported, alongside further synthetic and computational investigations. The preparation of the enantiomer of a Roche anti-cancer agent (RO4999200) 1 (96% ee) in three steps demonstrates the potential utility of this methodology.Peer reviewe
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Sterically hindered N-aryl/benzyl substituted piperi doi midazolin-2-ylidene palladium complexes and their catalytic activities
No full textA series of N-aryl (2a,b) or benzyl (2c,d) substituted piperidoimidazolinium salts and their palladium complexes (3a-d) were prepared and characterized by H-1, C-13 NMR, IR spectroscopy and elemental analysis. The crystal structures of 3a and 3c have been determined by X-ray crystallography. Thermogravimetric analysis (TGA) was applied to complexes (3a-d). The palladium complexes have been employed as catalyst for Suzuki-Miyaura cross coupling. The N-aryl substituted complex 3b was a highly efficient precatalyst and successfully employed in Suzuki-Miyaura cross coupling reactions of (hetero) aryl chlorides with arylboronic acids in air. In addition, the oxidative addition step of the reaction mechanism involving chlorobenzene and the catalysts 3a, 3b, 3c and 3d were computationally investigated by the DFT-w-B97X-D method and complete agreement were obtained with the catalytic results. To measure alpha-donating and pi-acceptor properties of the new ligands, the rhodium carbonyl complexes were also prepared. (C) 2018 Elsevier Ltd. All rights reserved.Dokuz Eylul UniversityDokuz Eylul University [2010.KB.FEN.13]; Ege UniversityEge University [2010-FEN -046, 2010-Fen-076]All calculations reported in this paper were performed at High Performance and Grid Computing Center (TRUBA resources), ULAKBIM. The authors also acknowledge Dokuz Eylul University for the use of the Agilent Xcalibur Eos diffractometer (purchased under University Research Grant no. 2010.KB.FEN.13). Financial support from Ege University (project 2010-FEN -046 and 2010-Fen-076) is gratefully acknowledged
Study of structural, optical properties and electronic structure of PTCDI-C5 organic nanostructure
No full textThis work reports the change in the structural, electronic, spectroscopic and optical properties of N,N?-Dipentyl-3,4,9,10-perylenedicarboximide (PTCDI-C5) small molecule via experimental and theoretical techniques. Experimental and simple models were taken into consideration to calculate the refractive index (n) of PTCDI-C5 from its energy gap (Eg) data. Electrical conductance was recorded. UV, FT-IR and FT-Raman spectra characteristics and the electronic properties of PTCDI-C5 were also recorded time-dependent (TD) DFT approach based on optimized structure with different solvent environments. The results herein obtained reveal that PTCDI-C5 material is suitable for UV and chemical sensors due to its good optoelectronic paramaters. © 2017 Elsevier B.V.Firat University Scientific Research Projects Management Unit 0001The numerical calculations reported in this paper were partially performed at TUBITAK ULAKBIM, High Performance and Grid Computing Centre (TRUBA resources). This study was supported by The Management Unit of Scientific Research Projects of Muş Alparslan University (MUSBAP) under Project 0001
The vanishing author in computer-generated works: a critical analysis of recent Australian case law
No full textAbstract
The use of software is ubiquitous in the creation of many copyright works, yet the requirement in copyright law that every work have a human author who engages in independent intellectual effort means that its use may prevent copyright subsistence. Several recent Australian cases have refocused attention on authorship as an essential criterion of copyright subsistence, and these cases suggest that much computer-produced output may be authorless and thus lack copyright protection. This article, the first in a two-part series, analyses how each case deals with the question of authorship of computer-produced works and why the use of software diminishes copyright protection for a significant number of computer-generated works. The article critiques the application of conventional notions of human authorship developed in the pre-computer age to modern productions and suggests alternative approaches to authorship that satisfy both the major objectives of copyright policy and the need to adapt to the computer age. The article argues that, without a broader judicial approach to authorship of computer-generated works, Parliament must remedy the lacuna in protection for these ‘authorless’ works. Possible solutions for reform are suggested. In a forthcoming article, the author comprehensively examines those reform proposals
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Computational and experimental studies of 2-[(E)-hydrazinylidenemethyl]-6-methoxy-4-[(E)-phenyldiazenyl]phenol and its tautomers
No full textA new azo-chromophore group containing a hydrazine-Schiff base compound, 2-[(E)-hydrazinylidenemethyl]-6-methoxy-4-[(E)-phenyldiazenyl]phenol, was synthesized and structurally characterized by single crystal X-ray diffraction study. The compound was found to crystallise in orthorhombic crystal system with Pca2(1) space group. In the structure, the molecule exhibits a phenol-imine intramolecular hydrogen bond and the -NH2 group also involves in intermolecular hydrogen bonding with one of the nitrogen atom of the azo group (-N=N-) forming a 1D zigzag chain. Computational studies were performed on the titled compound and its tautomers. As computationally, this compound and its tautomers were optimized by using M062X/6-311G(d,p) level. According to thermodynamic parameters, the most stable tautomer was found to be azo-enol form. This result was then taken into account and spectral studies, which are IR, UV-Vis and NMR spectra, of this compound were performed and examined in detail. All calculations were performed at gas phase (epsilon = 1.000), 2-propanol (epsilon = 19.264), 1,2-ethanediol (epsilon = 40.245), water (epsilon = 78.355), formamide (epsilon = 108.940) and N-methylformamide-mixture (epsilon = 181.560). (C) 2016 Elsevier B.V. All rights reserved.Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey [2015/1-1 YLS]The authors thank to Kahramanmaras Sutcu Imam University for financial support (project no: 2015/1-1 YLS), Kahramanmaras, Turkey. The numerical calculations reported in this paper are performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA Resources)
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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