Search Results - "Bekele, Y."

Event Trees and Epistemic Uncertainty in Long‐Term Volcanic Hazard Assessment of Rift Volcanoes: The Example of Aluto (Central Ethiopia) by P. Tierz, B. Clarke, E. S. Calder, F. Dessalegn, E. Lewi, G. Yirgu, K. Fontijn, J. M. Crummy, Y. Bekele, S. C. Loughlin

“…Abstract Aluto is a peralkaline rhyolitic caldera located in a highly populated area in central Ethiopia. Its postcaldera eruptive activity has mainly…”
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Pathways to psychiatric care in Ethiopia by Bekele, Y Y, Flisher, A J, Alem, A, Baheretebeb, Y

“…Understanding the pathways to psychiatric care and recognition of delay points are crucial for the development of interventions that aim to improve access to…”
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Cu(In,Ga)Se2 thin films and devices sputtered from a single target without additional selenization by FRANTZ, J. A, BEKELE, R. Y, NGUYEN, V. Q, SANGHERA, J. S, BRUCE, A, FROLOV, S. V, CYRUS, M, AGGARWAL, I. D

“…Typically, Cu(In,Ga)Se2 (CIGS) thin films for photovoltaic devices are deposited by co-evaporation or, alternately, by deposition of the metals with or…”
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Strain diversity of mycobacteria isolated from pulmonary tuberculosis patients at Debre Birhan Hospital, Ethiopia by Garedew, L., Mihret, A., Mamo, G., Abebe, T., Firdessa, R., Bekele, Y., Ameni, G.

“…BACKGROUND: Ethiopia ranks seventh in the list of 22 high tuberculosis (TB) burden countries, with an incidence rate of 379 cases per 100 000 population for TB…”
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Assessing volcanic hazard and exposure in a data poor context: Case study for Ethiopia, Kenya, and Cabo Verde by Jenkins, S.F., Mee, K., Engwell, S.L., Loughlin, S.C., Faria, B.V.E., Yirgu, G., Bekele, Y., Lewi, E., Vye-Brown, C., Fraser, S.A., Day, S.J., Lark, R.M., Huyck, C., Crummy, J.

“…Volcanoes produce a wide variety of hazards across varying spatial and temporal scales. When data are scarce on past eruptions and hazards, it can falsely…”
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Nonlinear Metasurface for Structured Light with Tunable Orbital Angular Momentum by Xu, Yun, Sun, Jingbo, Frantz, Jesse, Shalaev, Mikhail, Walasik, Wiktor, Pandey, Apra, Myers, Jason, Bekele, Robel, Tsukernik, Alexander, Litchinitser, Jasbinder

“…Orbital angular momentum (OAM) beams may create a new paradigm for the future classical and quantum communication systems. A majority of existing OAM beam…”
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Modern lineages of Mycobacterium tuberculosis in Addis Ababa, Ethiopia: implications for the tuberculosis control programe by Mihret, A, Bekele, Y, Aytenew, M, Assefa, Y, Abebe, M, Wassie, L, Loxton, GA, Yamuah, L, Aseffa, A, Walzl, G, Howe, R

“…Background: The genotyping of Mycobacterium tuberculosis strains is important to have unique insights into the dissemination dynamics and evolutionary genetics…”
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Nanoimaging of Open-Circuit Voltage in Photovoltaic Devices by Tennyson, Elizabeth M., Garrett, Joseph L., Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Sanghera, Jasbinder S., Munday, Jeremy N., Leite, Marina S.

“…A novel imaging platform to determine the open‐circuit voltage of solar cells with nanoscale spatial resolution is presented. Here, a variant of illuminated…”
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Reconfiguring structured light beams using nonlinear metasurfaces by Xu, Yun, Sun, Jingbo, Frantz, Jesse, Shalaev, Mikhail I, Walasik, Wiktor, Pandey, Apra, Myers, Jason D, Bekele, Robel Y, Tsukernik, Alexander, Sanghera, Jasbinder S, Litchinitser, Natalia M

“…Ultra-compact, low-loss, fast, and reconfigurable optical components, enabling manipulation of light by light, could open numerous opportunities for…”
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Thermal tuning of arsenic selenide glass thin films and devices by Frantz, Jesse A., Clabeau, Anthony, Myers, Jason D., Bekele, Robel Y., Nguyen, Vinh Q., Sanghera, Jasbinder S.

“…We present a method of post-deposition tuning of the optical properties of thin film dielectric filters and mirrors containing chalcogenide glass (ChG) layers…”
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Optical constants of germanium antimony telluride (GST) in amorphous, crystalline, and intermediate states by Frantz, Jesse A., Myers, Jason D., Clabeau, Anthony, Bekele, Robel Y., Hong, Nina, Vincenti, Maria A., Gandolfi, Marco, Sanghera, Jasbinder S.

“…The optical constants of germanium antimony telluride (GST), measured by spectroscopic ellipsometry (SE), for the spectral range of 350-30,000 nm are…”
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Propagating transverse electric and transverse magnetic modes in liquid crystal-clad planar waveguides by Kołacz, Jakub, Gotjen, Henry G., Bekele, Robel Y., Myers, Jason D., Frantz, Jesse A., Ziemkiewicz, Michael, Spillmann, Christopher M.

“…In a planar dielectric waveguide, weak confinement of a propagating mode in a high index core leads to a measurable evanescent interaction with the cladding…”
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Lipid hydroperoxide and markers of renal disease susceptibility in African-Caribbean and Caucasian patients with Type 2 diabetes mellitus by Mehrotra, S., Ling, K. L. E., Bekele, Y., Gerbino, E., Earle, K. A.

“…SUMMARY Aims  The reasons for the increased incidence of diabetic nephropathy in African‐Caribbean compared with Caucasian subjects are poorly understood…”
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Microstructured ZnO coatings combined with antireflective layers for light management in photovoltaic devices by Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Busse, Lynda E., Sanghera, Jasbinder S.

“…We describe microstructured ZnO coatings that improve photovoltaic (PV) device performance through their antireflective properties and their tendency to…”
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Arsenic selenide thin film degradation and its mitigation by Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Spillmann, Christopher M., Kolacz, Jakub, Gotjen, Henry, Nguyen, Vinh Q., McClain, Collin C., Sanghera, Jasbinder S.

“…Thin films of arsenic triselenide (As2Se3) glass degrade significantly under ambient conditions in the presence of light. We investigate the mechanism of this…”
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Reduction in surface state defects in iron pyrite by use of zinc sulfide passivation layers by Myers, Jason D., Frantz, Jesse A., Baker, Colin C., Erwin, Steven C., Qadri, Syed N., Bassim, Nabil, Qadri, Syed B., Bekele, Robel Y., Sanghera, Jasbinder S.

“…We have demonstrated a reduction in the prevalence of surface defect states in FeS2 iron pyrite thin films by encapsulating them with ZnS. Thin films of FeS2…”
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Quaternary Sputtered Cu(In,Ga)Se2 Absorbers for Photovoltaics: A Review by Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Nguyen, Vinh Q., Sadowski, Bryan M., Maximenko, Sergey I., Lumb, Matthew P., Walters, Robert J., Sanghera, Jasbinder S.

“…Quaternary sputtering is a promising alternative to more established deposition methods for the fabrication of Cu(In,Ga)Se 2 (CIGS) thin films for…”
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Solar Cells: Nanoimaging of Open-Circuit Voltage in Photovoltaic Devices (Adv. Energy Mater. 23/2015) by Tennyson, Elizabeth M., Garrett, Joseph L., Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Sanghera, Jasbinder S., Munday, Jeremy N., Leite, Marina S.

“…In article number 1501142, Marina S. Leite and co‐workers report the use of an imaging platform to map open‐circuit voltage in solar cells with a lateral…”
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Assessing local voltage in CIGS solar cells by nanoscale resolved Kelvin Probe Force Microscopy and sub-micron photoluminescence by Tennyson, Elizabeth M., Garrett, Joseph L., Chen Gong, Frantz, Jesse A., Myers, Jason D., Bekele, Robel Y., Sanghera, Jas S., Munday, Jeremy N., Leite, Marina S.

“…Here we use nanoscale resolved Kelvin Probe Force Microscopy (KPFM) to locally probe the open circuit voltage in CIGS thin film solar cells…”
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Photovoltage Tomography in Polycrystalline Solar Cells by Tennyson, Elizabeth M, Frantz, Jesse A, Howard, John M, Gunnarsson, William B, Myers, Jason D, Bekele, Robel Y, Sanghera, Jasbinder S, Na, Suok-Min, Leite, Marina S

“…To date, the performance of all polycrystalline photovoltaics is limited by their open-circuit voltage (V oc), an indicator of charge carrier recombination…”
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