Software Developers Sentiment Analysis: A Systematic Mapping

Coelho, Andre A. N; Silva, Thalita T. O.; Oliveira, Alessandreia Marta de; David, José

doi:10.1109/clei.2018.00017

Cited by 3 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result suggested to us that the two compounds are isostructural. This evidence was further confirmed by performing an independent structure determination adopting a combined Monte Carlo/simulated annealing approach, as implemented in TOPAS Academic 4.1 (Coelho, 2007), where phendione was described as a rigid body (expressed in Cartesian coordinates, extracted from the crystal structure of Stephenson and Hardie, 2006). The position of its centre of mass and its orientation within the unit cell were allowed to vary, along with the positions of the Cl and Co atoms.…”

Section: Methodsmentioning

confidence: 84%

“…After a preliminary acquisition for finger printing analysis in the 3–35° 2 θ range, diffraction data for a full structure determination were collected up to 105° 2 θ , with steps of 0.02°, with an overall scan time of approximately 16 h. A standard peak search, followed by profile fitting, enabled us to estimate the low-to-medium angle peak maximum positions. Approximate unit cell parameters were obtained through the singular value decomposition algorithm (Coelho, 2003) implemented in TOPAS Academic 4.1 (Coelho, 2007). A search in the Cambridge Structural Database v. 1.18 (Groom et al , 2016) revealed the existence of two compounds with similar content, space group, and unit cell, namely: cis -[Hg(phendione) 2 Cl 2 ] (Figueiras et al , 2009; Ma et al , 2010) and cis -[Cu(phendione) 2 Br 2 ] (Stephenson and Hardie, 2006).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]

2018

View full text Add to dashboard Cite

The reduction of cis-[CoIII(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2]Cl into the neutral compound cis-[CoII(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2] was observed during developmental studies of new antimalarial drugs. The crystal structure of cis-[CoII(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2] was unveiled by powder X-ray diffraction studies (PXRD). PXRD details, unit cell parameters, and space group for cis-[CoII(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2], C24H12Cl2CoN4O4, are reported [a = 41.4951 (13) Å, b = 8.2768 (2) Å, c = 12.4994 (3) Å, unit cell volume V = 4292.9 (2) Å3, Z = 8, and space group Fdd2]. Infrared spectroscopy features are also discussed.

show abstract

Section: Methodsmentioning

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]

2018

View full text Add to dashboard Cite

show abstract

“…In addition to the data collected on POWGEN, historical data submitted during the CPD round robin from the DUALSPEC C2 constant wavelength diffractometer at Chalk River, Ontario, Canada were obtained from the round-robin organizers. The data were analysed using a beta version of TOPAS 6 (Coelho, 2015).…”

Section: Methodsmentioning

confidence: 99%

Quantitative phase analysis of challenging samples using neutron powder diffraction. Sample #4 from the CPD QPA round robin revisited

Whitfield

2016

Powder Diffr.

View full text Add to dashboard Cite

Quantitative phase analysis (QPA) using neutron powder diffraction more often than not involves non-ambient studies where no sample preparation is possible. The larger samples and penetration of neutrons versus X-rays makes neutron diffraction less susceptible to inhomogeneity and large grain sizes, but most well-characterized QPA standard samples do not have these characteristics. Sample #4 from the International Union of Crystallography Commission on Powder Diffraction QPA round robin was one such sample. Data were collected using the POWGEN time-of-flight (TOF) neutron powder diffractometer and analysed together with historical data from the C2 diffractometer at Chalk River. The presence of magnetic reflections from Fe 3 O 4 (magnetite) in the sample was an additional consideration, and given the frequency at which iron-containing and other magnetic compounds are present during in-operando studies their possible impact on the accuracy of QPA is of interest. Additionally, scattering from thermal diffuse scattering in the high-Q region (<0.6 Å) accessible with TOF data could impact QPA results during least-squares because of the extreme peak overlaps present in this region. Refinement of POWGEN data was largely insensitive to the modification of longer d-spacing reflections by magnetic contributions, but the constant-wavelength data were adversely impacted if the magnetic structure was not included. A robust refinement weighting was found to be effective in reducing quantification errors using the constant-wavelength neutron data both where intensities from magnetic reflections were ignored and included. Results from the TOF data were very sensitive to inadequate modelling of the high-Q (low d-spacing) background using simple polynomials.

show abstract

“…Similarly, the combination of hard X-rays and modern Rietveld refinement software (Coelho, 2000; Stinton and Evans, 2006) extended the scope of dynamic and in situ PXRD experiments. Particular advantages of HE-PXRD, e.g.…”

Section: Introductionmentioning

confidence: 99%

High-energy X-ray applications: current status and new opportunities

Jung¹,

Donath²,

Bednarčı́k

2017

Powder Diffr.

View full text Add to dashboard Cite

Characterization of semi and noncrystalline materials, monitoring structural phase transitions in situ, and obtaining structural information together with spatial distribution of the investigated material are only a few applications that hugely benefitted from the combination of high-energy X-rays and modern algorithms for data processing. This work examines the possibility of advancing these applications by shortening the data acquisition and improving the data quality by using the new high-energy PILATUS3 CdTe detector.

show abstract

Software Developers Sentiment Analysis: A Systematic Mapping

Cited by 3 publications

References 29 publications

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]

Quantitative phase analysis of challenging samples using neutron powder diffraction. Sample #4 from the CPD QPA round robin revisited

High-energy X-ray applications: current status and new opportunities

Contact Info

Product

Resources

About

Software Developers Sentiment Analysis: A Systematic Mapping

Cited by 3 publications

References 29 publications

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2]

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ2N,N′-1,10-phenanthroline-5,6-dione)2Cl2]

Quantitative phase analysis of challenging samples using neutron powder diffraction. Sample #4 from the CPD QPA round robin revisited

High-energy X-ray applications: current status and new opportunities

Contact Info

Product

Resources

About

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]

Powder X-ray diffraction structural characterization of the coordination complex cis-[Co(κ²N,N′-1,10-phenanthroline-5,6-dione)₂Cl₂]