51,343 research outputs found
The astrochemical observatory: Computational and theoretical focus on molecular chirality changing torsions around O – O and S – S bonds
No full textThe observation of hydrogen peroxide in the interstellar medium represents a remarkable discovery for the astrochemistry community. The prototypical role that this molecule, arguably the simplest chiral molecule, plays in the evolution of life in biospheres, is related to the chirality change transitions associated with the torsional motions around the O - O and the S - S bonds. In this paper, we present an overview on the state-of-art of possible experiments to demonstrate chiral effects discrimination and computational tools applied to peroxides and persulfides
Ethnoveterinary medicine in African organic poultry production
No full textThis review of literature gives an overview of the current and previous efforts on the use
of Ethnoveterinary medicine in African rural and organic commercial poultry production.
Background information on the use of Ethnoveterinary medicine in Africa is presented.
Problems faced in the use of Ethnoveterinary medicine are outlined. Some literatures of repute
are listed in to spur further research into the use of Ethnoveterinary medicine and practices in
African poultry production. This paper concludes that ethnoveterinary medicine in relation
to organic livestock production need to be integrated into the policy frameworks, extension
delivery system and livestock training curricular of African nations
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
An Examination of Contemporary Conflict Management Approach in the 21st Century Nigeria
No full textConflict is inseparable part of human being, and an attempt to ignore it will lead to tragedy. The history of conflict in Nigeria and its resolution dated with the birth of the country. The study did a critical analysis of modern conflict management approaches in the contemporary Nigeria. The study is historical in nature relying mainly on secondary source of data collection. The work found that conflict in Nigeria is caused by multiplicity of factors such as colonial legacy, ethnic identity, religious affiliation, land and ecology factor, worsening economic conditions, and discrimination and neglect among others. Suppression, judicial process, state creation, creation of specialized ministry, synergistic approach and interfaith peacemaking among various approaches have been employed to manage the conflict in the country. The study discovered among proliferation of institutions, unclear legal and policy framework, primordial factor, financial constraints, lack of political will, and weak administration of justice as factors hindering the effectiveness of the approaches. The paper concluded by recommending combine participation, inclusion of expert in formulation of strategies, capacity building, enactment of legal frameworks and arms control. Judicial and security sectors reformed is also fundamental to the effective conflict management in Nigeria.
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Observations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
No full textFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
using a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in
proton–proton collisions at a centre-of-mass energy of
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Pattern Line Object(s)
No full textHet afstudeerproject Pattern_Line_Object(s) beslaat het inrichten van een restgebied gelegen tussen het spoor en de snelweg (A20). Beide infrastructurele banen zijn op een talud gelegen. Het gat in het stedelijke weefsel wordt opgevuld met een weloverwogen compositorische samenstelling: Pattern Line Object(s). Deze compositie maakt gebruik van de banaliteit van het perifere landschap en versterkt deze op verscheidene momenten. De bereikbaarheid van het gebied wordt uitgebuit, op een wijze waarbij een omschrijving als park & ride of transferium een understatement zouden zijn. Het gebied doorgaat een transformatie van een onbereikbaar en verwaarloosd stuk stadsrand tot entree gebied voor Schiedam en Rotterdam. Dit wordt niet alleen op infrastructureel maar ook op visueel niveau bewerkstelligd.Architectur
Dibenzyl ferrocene-1,1′-dicarboxylate
No full textIn the title compound, [Fe(C13H11O2)2], there are markedly different orientations of the two phenylmethoxycarbonyl substituents [O—C—C—C torsion angles = 84.5 (3) and 139.6 (2)°]. These orientations are mediated by a number of intermolecular C—H...O interactions, which result in a one-dimensional hydrogen-bonded network of molecules
Measurement of the CP-violating phase \phi s in Bs->J/\psi\pi+\pi- decays
No full textMeasurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/\psi pi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found
Thermal boundary layer equation for turbulent Rayleigh-Benard convection
No full textWe report a new thermal boundary layer equation for turbulent Rayleigh-Benard convection for Prandtl number P>1that takes into account the effect of turbulent fluctuations. These fluctuations are neglected in existing equations, which are based on steady-state and laminar assumptions. Using this new equation, we derive analytically the mean temperature profiles in two limits: Pr~1 and Pr>>1. These two theoretical predictions are in excellent agreement with the results of our direct numerical simulations for Pr=4.38 and Pr=2547.9, respectively
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