Physics: Recent submissions
Now showing items 81-100 of 100
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New red giant star in the Kepler open cluster NGC 6819
(New Astronomy, 2017-12)A recent study indicated that 39 red giant stars showing solar-like oscillations were discovered in the field of Kepler open cluster NGC 6819. The study was based on photometric distance estimates of 27 stars out of the ... -
Ionospheric irregularities and scintillations: a direct comparison of in situ density observations with ground‑based L‑band receivers
(Earth, Planets and Space, 2020-10)Ionospheric irregularities can affect satellite communication and navigation by causing scintillations of radio signals. The scintillations are routinely measured using ground-based networks of receivers. This study presents ... -
Inclusive education and research through African Network of Women in Astronomy and STEM for GIRLS in Ethiopia initiatives
(Proceedings of the International Astronomical Union, 2019)The African Network of Women in Astronomy and STEM for GIRLS in Ethiopia initiatives have been established with aim to strengthen the participation of girls and women in astronomy and science in Africa and Ethiopia. We ... -
High-resolution spectroscopy of flares and CMEs on AD Leo⋆
(Astronomy & Astrophysics manuscript, 2020-04)Context. Flares and coronal mass ejections (CMEs) are important for the evolution of the atmospheres of planets and their potential habitability, particularly for planets orbiting M stars at a distance < 0.4AU. Detections ... -
GPS derived amplitude scintillation proxy model: A case over a low latitude station in East Africa
(Journal of Atmospheric and Solar–Terrestrial Physics, 2020-10)Ionospheric scintillation is quite a common phenomenon over the low latitude regions and in East Africa it is often monitored using measurements from the SCIntillation Network Decision Aid (SCINDA) receivers. The SCINDA ... -
Effects of low-dose γ-irradiation on the structural, morphological, and optical properties of fluorine-doped tin oxide thin films
(Radiation Physics and Chemistry, 2020-07)This paper presents the effects of low-dose γ-irradiation on the structural, morphological, and optical properties of Fluorine-doped tin oxide (FTO) thin films for application as a passive thermal control coating in future ... -
Dust ion acoustic double layers in a 4-component dusty plasma
(Indian Journal of Physics, 2018-02)In this paper, we study the Dust ion acoustic (DIA) solitons in an unmagnetised dusty plasma comprising of cold dust particles, electrons that follow Cairns distribution, warm inertial ions, and ion-beams of equal mass, ... -
Assessment of scintillation proxy maps for a scintillation study during geomagnetically quiet and disturbed conditions over Uganda
(Journal of Atmospheric and Solar–Terrestrial Physics, 2016-12)The objective of this paper is demonstrate the validity and usefulness of scintillation proxies derived from IGS data, through its comparison with data from dedicated scintillation monitors and its application to GNSS ... -
Are the observed gaps in protoplanetary discs caused by growing planets?
(Royal Astronomical Society, 2019-06)Recent detailed observations of protoplanetary discs revealed a lot of substructures that are mostly ring like. One interpretation is that these rings are caused by growing planets. These potential planets are not yet ... -
Development in astronomy and space science in Africa
(Nature Astronomy, 2018-07) -
Determination of Natural Radioactivity Levels due to Mine Tailings from Selected Mines in Southwestern Uganda
(Journal of Environment and Earth Science, 2016)The aim of this study was to determine the natural radioactivity levels of primordial radionuclides in soil mine tailings from selected mines in Southwestern Uganda. This was achieved by analyzing thirty six samples of ... -
Briquetting and Torrefaction of Agricultural Residues for Energy Production
(Newcastle University, 2019-06)Agricultural residues are a potential feedstock for renewable energy because they are abundant and CO2 neutral. Due to their low energy density and heterogeneity, there are key challenges in handling, storage, transportation ... -
Are the observed gaps in protoplanetary discs caused by growing planets?
(Monthly Notices of the Royal Astronomical Society, 2019-07-10)Recent detailed observations of protoplanetary discs revealed a lot of substructures that are mostly ring like. One interpretation is that these rings are caused by growing planets. These potential planets are not yet ... -
Diversity of Mycobacterium tuberculosis Complex Lineages Associated with Pulmonary Tuberculosis in Southwestern, Uganda
(Hindawi, 2021-06-28)Uganda is among the 22 countries in the world with a high burden of tuberculosis. The southwestern region of the country has consistently registered a high TB/HIV incidence rate. This study is aimed at characterizing the ... -
Characterization of the Low Latitude Plasma Density Irregularities Observed using C/NOFS and SCINDA Data.
(Advances in Space Research, 2017-08-04)Abstract Complex electrodynamic processes over the low latitude region often result in post sunset plasma density irregularities which degrade satellite communication and navigation. In order to forecast the density ... -
Characterisation of Total Electron Content over African region using Radio Occultation observations of COSMIC satellites
(Elsevier Ltd, 2019-08-08)Abstract This study characterised the Total Electron Content (TEC) over the African region during the years 2008–2015. The TEC data used were the integrated electron density observed during Radio Occultation (RO) event ... -
Are the observed gaps in protoplanetary discs caused by growing planets?
(Royal Astronomical Society, 2019-04-13)ABSTRACT Recent detailed observations of protoplanetary discs revealed a lot of substructures that are mostly ring like. One interpretation is that these rings are caused by growing planets. These potential planets are ... -
Assessment of scintillation proxy maps for a scintillation study during geomagnetically quiet and disturbed conditions over Uganda
(International Science Program (ISP) from Uppsala University in Sweden, 2016-11-27)A B S T R A C T The objective of this paper is demonstrate the validity and usefulness of scintillation proxies derived from IGS data, through its comparison with data from dedicated scintillation monitors and its application ... -
Are the observed gaps in protoplanetary discs caused by growing planets?
(Oxford University Press on behalf of the Royal Astronomical Society, 2019-06-25)ABSTRACT Recent detailed observations of protoplanetary discs revealed a lot of substructures that are mostly ring like. One interpretation is that these rings are caused by growing planets. These potential planets are ... -
An effort to study the influence of tides on the longitudinal variation of vertical E×B drift over the African sector
(Elsevier Ltd, 2020-06-03)Meteorological processes such as tides influence ionospheric variability through vertical coupling. For the first time, we have used data from Communication Navigation Outage and Forecasting System (C/NOFS) satellite rom ...
