Zobrazeno 1 - 10
of 165
pro vyhledávání: '"P. Sifuna"'
Publikováno v:
Cambridge Prisms: Global Mental Health, Vol 2 (2015)
Background. There have been no household surveys of adult attention deficit and hyperactivity disorder (ADHD) in Kenya, and only one in sub-Saharan Africa. Methods. Data on ADHD was used from a household survey of mental disorders and their associ
Externí odkaz:
https://doaj.org/article/332153869e53485ea43671076f597ee9
Owing to the energy shortages and various severe adverse effects of traditional fossil fuel power generation mechanisms, photovoltaic and thermoelectric materials are considered as the potential candidates for building non-traditional, efficient, and
Externí odkaz:
http://arxiv.org/abs/2208.04123
Researchers have addressed the non-traditional power generation schemes as alternatives to the traditional fossil-fuel methods enormously since the scientific community has serious concerns about shortages of energy on our planet for future generatio
Externí odkaz:
http://arxiv.org/abs/2204.12123
Autor:
Wakini, Jasmine, Songa, Carolyne, Chege, Stephen, Saouma, Felix O., Wabululu, Elica, Nyawere, P. W. O, Odari, Victor, Sifuna, James, Manyali, George S.
We compute for the first time a complete charge analysis (Bader and Born effective) on $X_3^{2+}$Bi$^{3-}$N$^{3-}$ ($X$=Ca,Sr,Ba). The crystals show a great electron sharing with little possibility of ferroelectricity. $Inverse$ perovskites have been
Externí odkaz:
http://arxiv.org/abs/2203.00359
The structural and electronic properties of $A$TiO$_3$ ($A$=Ca, Sr, Ba) have been investigated under strain-free situation and with realistic constraints using first-principles calculations. We endeavored to find out the interplay between mild lattic
Externí odkaz:
http://arxiv.org/abs/2009.02529
Publikováno v:
Phys. Rev. B 101, 174114 (2020)
We study from first-principles the structural and electronic properties of head-to-head (HH) and tail-to-tail (TT) 180$^\circ$ domain walls in isolated free-standing PbTiO$_{3}$ slabs. For sufficiently thick domains ($n$ = 16 unit cells of PbTiO$_{3}
Externí odkaz:
http://arxiv.org/abs/2004.02467
Publikováno v:
MRS Advances 2020
Transition metal dichalcogenide materials $MX_2 (M=Mo,W;X=S,Se)$ are being thoroughly studied due to their novel two-dimensional structure, that is associated with exceptional optical and transport properties. From a computational point of view, Dens
Externí odkaz:
http://arxiv.org/abs/2001.05959
Autor:
Sifuna, James, Manyali, George S., Wabululu, Elicah, Songa, Carolyne, Otieno, Alloysious, Sironik, Stephen
We report using density functional theory (DFT), the ground-state properties of the recently synthesized and characterized Sr$_3$[C$_2$N]$_2$ crystal. The nearly colorless, centrosymmetric Sr$_3$[C$_2$N]$_2$ crystallizes in a monoclinic unit cell wit
Externí odkaz:
http://arxiv.org/abs/2001.01488
Autor:
Manyali, George S., Sifuna, James
Publikováno v:
AIP Advances 9, 000000 (2019)
Using first principles calculation, the structural and mechanical properties of BP$_3$N$_6$ which adopts an orthorhombic structure with space group Pna2$_1$ (no. 33), were determined at three different pressure values (0, 20 and 42.4~GPa). The nine i
Externí odkaz:
http://arxiv.org/abs/1909.08879
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