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School of Science and Computing (JA): Recent submissions

  • Investigation into crack healing of asphalt mixtures using healing agents 
    Riara, Martin M.; Tang, Ping; Mo, Liantong; Javilla, Barugahare; Wu, Shaopeng (Elsevier, 2018-02)
    This study investigated the crack healing ability of aged and unaged AC-13 basalt asphalt mixtures using five healing agents. Notched semicircular asphalt mixtures were cracked and healed using the healing agents and the ...
  • Investigation of rheological properties of light colored synthetic asphalt binders containing different polymer modifiers 
    Tang, Ping; Mo, Liantong; Pan, Changluan; Fang, Hao; Javilla, Barugahare; Riara, Martin M. (Elsevier, 2018-02)
    Light colored synthetic asphalt (LCSA) binders were prepared by using aromatic oil, petroleum resin and various polymer modifiers. The polymers used included styrene-butadiene-styrene block copolymers (SBS), ethylene-vinyl ...
  • Evaluation of aging resistance of graphene oxide modified asphalt 
    Wu, Shaopeng; Zhao, Zhijie; Li, Yuanyuan; Pang, Ling; Amirkhanian, Serji; Riara, Martin M. (MDPI, 2017-07)
    Graphene oxide (GO) has a unique layered structure with excellent gas and liquid blocking properties. It is widely used in many areas, such as gas sensors, carbon-based electronics, impermeable membranes, and polymeric ...
  • Transcriptional responses of Anopheles gambiae s.s mosquito larvae to chronic exposure of cadmium heavy metal [version 1; referees: 2 approved with reservations] 
    Muturi, Catherine N.; Rono, Martin K.; Masiga, Daniel K.; Wachira, Francis N. (F1000Research, 2017-06-25)
    Background: Anopheles gambiae larvae traditionally thrive in non-polluted environments. We previously documented the presence of the larvae in heavy metal polluted urban aquatic environments and the associated biological ...
  •   Transcriptional responses of Anopheles gambiae s.s mosquito larvae to chronic exposure of cadmium heavy metal [version 2; referees: 1 approved, 1 approved with reservations] 
     Muturi, Catherine N.; Rono, Martin K. ;  Masiga, Daniel K.; Wachira, Francis N.; Ochieng, Richard ; Mireji, Paul O.  (F1000Research, 2018)
    Background: Anopheles gambiae larvae traditionally thrive in non-polluted environments. We previously documented the presence of the larvae in heavy metal polluted urban aquatic environments and the associated biologic ...
  • Methylation analysis revealed salicylic acid affects pearl millet defense through external cytosine DNA demethylation 
    Ngom, Baba; Mamati, Edward; Goudiaby, Mame F.; Kimatu, Josphert N.; Sarr, Ibrahima; Diouf, Diaga; Kane, Ndjido A. (Taylor & Francis, 2018-05)
    The cytosine DNA methylation and demethylation have a role in regulating plant responses to the environment by affecting the promoter regions of most plant defense-related genes through the CpG islands or the CCGG motifs. ...
  • Aluminum toxicity vs salicylic acid effects in pearl millet methylome 
    Ngom, Baba; Mamati, Edward; Sarr, Ibrahima; Kimatu, Josphert N. (2018-04)
    Aluminum toxicity is one of most distributed plant abiotic stress in the world, causing root inhibition and therefore crop losses. Plants continuously adapt its defense to abiotic stresses through different mechanisms ...
  • Integrating a comprehensive DNA barcode reference library with a global map of yews (Taxus L.) for forensic identification 
    Liu, Jie; Milne, Richard I.; Möller, Michael; Zhu, Guang‐Fu; Ye, Lin‐Jiang; Luo, Ya‐Huang; Yang, Jun‐Bo; Wambulwa, Moses C.; Wang, Chun‐Neng; Li, De‐Zhu; Gao, Lian‐Ming (2018-05-22)
    Rapid and accurate identification of endangered species is a critical component of bio‐surveillance and conservation management, and potentially policing illegal trades. However, this is often not possible using traditional ...
  • Influence of Nitrogen Fertilisation on Red Spider Mites (Oligonychus coffeae Nietner) and Overhead Volatile Organic Compounds in Tea (Camellia sinensis) 
    Odak, Jenipher A.; Owuor, P. Okinda; Mang’uro, Lawrence O. A.; Wachira, Francis N.; Cheramgoi, Evelyne (2017-09)
    Nitrogen fertilisation influences tea yields, quality and pests infestation levels. Red spider mites reduce tea production in western Kenya during prolonged droughts. Nitrogen fertiliser use maybe an agronomic ...
  • Antiretroviral resistance among HIV-1 patients on first-line therapy attending a comprehensive care clinic in Kenyatta National Hospital, Kenya: a retrospective analysis 
    Kinyua, Joyceline G.; Lihana, Raphael W.; Kiptoo, Michael K.; Muasya, Timothy; Odera, Irene; Muiruri, Peter; Songok, Elijah M. (African Field Epidemiology Network, 2018-04-02)
    Introduction: antiretroviral therapy plays a major role in reducing the impact of Human Immunodeficiency Virus/Acquired Immune Disease Syndrome, especially in resource-limited settings. However, without proper infrastructure, ...
  • Varroa-specific hygienic behavior of Apis mellifera scutellata in Kenya 
    Cheruiyot, Sammy K.; Lattorff, H. Michael G.; Kahuthia-Gathu, Ruth; Mbugi, Jenard P.; Muli, Elliud (Springer Paris, 2018-02)
    Varroa -specific hygienic behavior is a hereditary trait of honey bee (Apis mellifera ), which supports resistance to Varroa destructor. This study investigated the response of Apis mellifera scutellata to Varroa ...
  • A new measurement of the neutron detection efficiency for the NaI Crystal Ball detector 
    Martemianov, M.; Kulikov, V.; Demissie, B. T.; Marinides, Z.; Akondi, C. S.; Annand, J. R.; Arends, H. J.; Beck, R.; Borisov, N.; Braghieri, A.; Briscoe, W. J.; Cherepnya, S.; Collicott, C.; Costanza, S.; Downie, E. J.; Dieterle, M.; Ferretti Bondy, M. I.; Fil'kov, L. V.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Gurevich, G.; Hornidge,D.; Huber, G. M.; Kaeser, A.; Kashevarov, V. L.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev, A.; Linturi, James M.; Lisin, V.; Livingston, K.; MacGregor, I. J.; Manley, D. M.; Martel, P. P.; Middleton, D. G.; Miskimen, R.; Mushkarenkov, A.; Neganov, A.; Neiser, A.; Oberle, M.; Ostrick, M.; Ott, P.; Otte, P. B.; Oussena, B.; Pedroni, P.; Polonski, A.; Prakhov, S.; Ron, G.; Rostomyan, T.; Sarty, A.; Schott, D. M.; Schumann, S.; Sokhoyan, V.; Steffen, O.; Strakovsky, I. I.; Strub, Th.; Supek, I.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu.A.; Wagner, S.; Watts, D. P.; Wettig, J.; Werthmüller, D.; Witthauer, L.; Wolfes, M. (IOP Publishing, 2015-04)
    We report on a measurement of the neutron detection efficiency in NaI crystals in the Crystal Ball detector obtained from a study of single π0 photoproduction on deuterium using the tagged photon beam at the Mainz Microtron. ...
  • First measurement of the polarization observable E and helicity-dependent cross sections in single π0 photoproduction from quasi-free nucleons 
    Dieterle, M.; Witthauer, L.; Cividini, F.; Abt, S.; Achenbach, P.; Adlarson, P.; Afzal, F.; Ahmed, Z.; Akondi, C. S.; Annand, J. R.; Arends, H. J.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Costanza, S.; Collicott, C.; Denig, A.; Downie, E. J.; Drexler, P.; Ferretti-Bondy, M. I.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Günther, M.; Gurevich, G. M.; Hamilton, D.; Hornidge, D.; Huber, G. M.; Käser, A.; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev, A. B.; Linturi, James M.; Lisin, V.; Livingston, K.; Lutterer, S.; MacGregor, I. J.; Mancell, J.; Manley, D. M.; Martel, P. P.; Metag, V.; Meyer, W.; Miskimen, R.; Mornacchi, E.; Mushkarenkov, A.; Neganov, A. B.; Neiser, A.; Oberle, M.; Ostrick, M.; Otte, P. B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S. N.; Rajabi, A.; Reicherz, G.; Ron, G.; Rostomyan, T.; Sarty, A.; Sfienti, C.; Sikora, M. H.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strub, Th.; Supek, I.; Thiel, A.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu.A.; Walford, N. K.; Watts, D. P.; Werthmüller, D.; Wettig, J.; Wolfes, M.; Zana L. (Elsevier, 2017-07-10)
    The double-polarization observable E and the helicity-dependent cross sections σ1/2and σ3/2 have been measured for the first time for single π0 photoproduction from protons and neutrons bound in the deuteron at the electron ...
  • Measurement of the omega -> pi^0 e^+e^- and eta -> e^+e^-g Dalitz decays with the A2 setup at MAMI 
    Adlarson, P.; Afzal, F.; Afzal, F.; Aguar-Bartolomé, P.; Ahmed, Z.; Annand, J. R.; Arends, H. J.; Bantawa, K.; Beck, R.; Berghäuser, H.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cherepnya, S.; Cividini, F.; Collicott, C.; Costanza, S.; Danilkin, I. V.; Denig, A.; Dieterle, M.; Downie, E. J.; Drexler, P.; Ferretti Bondy, M. I.; Fil'kov, L. V.; Fil'kov, L. V.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Gurevich, G. M.; Hamilton, D. J.; Hornidge, D.; Huber, G. M.; Jude, T. C.; Käser, A.; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev,, A.; Linturi, James M.; Lisin, V.; Livingston, K.; MacGregor, I. J.; Macrae, R.; Manley, D. M.; Martel, P. P.; McGeorge, J. C.; McNicoll, E. F.; Metag, V.; Middleton, D. G.; Miskimen, R.; Mornacchi, E.; Mullen, C.; Mushkarenkov, A.; Neganov, A.; Neiser, A.; Nikolaev, A.; Oberle, M.; Ostrick, M.; Ott, P.; Otte, P. B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S.; Rajabi, A.; Robinson, J.; Ron, G.; Rosner, G.; Rostomyan, T.; Sfienti, C.; Sikora, M. H.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strandberg, B.; Strub, Th.; Supek, I.; Thiel, A.; Thiel, M.; ; Thomas, A.; Unverzagt, M.; Usov, Yu. A.; Wagner, S.; Walford, N.; Watts, D. P.; Werthmüller, D.; Wettig, J.; Witthauer, L.; Wolfes, M.; Zana, L. A. (2017)
    The Dalitz decays η→e+e−γ and ω→π0e+e− have been measured in the γp→ηp and γp→ωp reactions, respectively, with the A2 tagged-photon facility at the Mainz Microtron. The value obtained for the slope parameter of the ...
  • Measurement of the ω→π0e+e− and η→e+e−γ Dalitz decays with the A2 setup at MAMI 
    Adlarson, P.; Afzal, F.; Aguar-Bartolomé, P.; Ahmed, Z.; Annand, J. R.; Arends, H. J.; Bantawa, K.; Beck, R.; Berghäuser, H.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cherepnya, S.; Cividini, F.; Collicott, C.; Costanza, S.; I. V. Danilkin,; Danilkin, I. V.; Denig, A.; Dieterle, M.; Downie, E. J.; Drexler, P.; Ferretti Bondy, M. I.; Fil'kov, L. V.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Gurevich, G. M.; Hamilton, D. J.; Hornidge, D.; Huber, G. M.; Jude, T. C.; Käser, A.; ; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev, A.; Linturi, James M.; Lisin, V.; Livingston, K.; MacGregor, I. J.; Macrae, R.; Manley, D. M.; Martel, P. P.; McGeorge, J. C.; McNicoll, E. F.; Metag, V.; Middleton, D. G.; Miskimen, R.; Mornacchi, E.; Mullen, C.; Mushkarenkov, A. (2017)
    The Dalitz decays η→e+e−γ and ω→π0e+e− have been measured in the γp→ηp and γp→ωp reactions, respectively, with the A2 tagged-photon facility at the Mainz Microtron. The value obtained for the slope parameter of the ...
  • Photon asymmetry measurements of γ→p→π0p for Eγ=320−650 MeV 
    Gardner, S.; Howdle, D.; Sikora, M. H.; Wunderlich, Y.; Abt, S.; Achenbach, P.; Afzal, F.; Aguar-Bartolome, P.; Ahmed, Z.; Annand, J. R.; Arends, H. J.; Bantawa, K.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cherepnya, S.; Cividini, F.; Costanza, S.; Collicott, C.; Demissie, B. T.; Denig, A.; Dieterle, M.; Downie, E. J.; Drexler, P.; Ferretti-Bondy, M. I.; Filkov, L. V.; Glazier, D. I.; Garni, S.; Gradl, W.; G¨unther, M.; Gurevich, G. M.; Hall Barrientos, P.; Hamilton, D.; Heid, E.; Hornidge, D.; Huber, G. M.; Jahn, O.; Jude, T. C.; K¨aser, A.; Kay, S.; Kashevarov, V. L.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Linturi, James M.; Lisin, V.; Livingston, K.; Lutterer, S.; MacGregor, J. D.; Macrae, R.; Mancell, J.; Manley, D. M.; Martel, P. P.; McGeorge, J. C.; McNicoll, E. F.; Middleton, D. G.; Miskimen, R.; Mullen, C.; Mushkarenkov, A.; Neganov, A. B.; Neiser, A.; Nikolaev, A.; Oberle, M.; Ostrick, M.; Owens, R. O.; Otte, P. B.; Oussena, B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S.; Rajabi, A.; Robinson, J.; Rosner, G.; Rostomyanm,T.; Sarty, A.; Schumann, S.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Sfienti, C.; Strakovsky, I. I.; Strandberg, B.; Strub, T.; Supek, I.; Tarbert, C. M.; Thiel, A.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu. A.; Watts, D. P.; Werthm¨uller, D.; Wettig, J.; Wolfes, M.; Witthauer, L.; Zana, L. (2016)
    High-statistics measurements of the photon asymmetry Σ for the γp → π0p reaction have been made in the center-of-mass energy range W = 1214–1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal ...
  • Design of internal superconducting polarizing solenoid for frozen spin target 
    Linturi, James M. (2013)
    Scattering experiments with polarized targets and beams are necessary to check the present models and to achieve a better knowledge of the nucleon structure. The development of the frozen spin target technique has opened ...
  • A distorted wave method applied to study the 23 S and 23P excitation 
    Linturi, James M.; Okumu, J.; Singh, C. S. (2011-04)
    The distorted wave method has been applied to calculate the differential and integral cross sections for 11S-23P excitations of helium atom by electron impact in the energy range of 40-200 eV. ...
  • Determination of the scalar polarizabilities of the proton using beam asymmetry\Sigma_ {3} in Compton scattering 
    Sokhoyan, V.; Downie, E. J.; Mornacchi, E.; McGovern, J. A.; Krupina, N.; Afzal, F.; Ahrens, J.; Akondi, C. S.; Annand, J. R. M.; Arends, H. J.; Beck, R. (Springer Verlag, 2017)
    The scalar dipole polarizabilities, αE1 and βM1, are fundamental properties related to the internal dynamics of the nucleon. The currently accepted values of the proton polarizabilities were determined by fitting to ...
  • Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons 
    Witthauer, L.; Dieterle, M.; Abt, S.; Achenbach, P.; Afzal, F.; Ahmed, Z.; Akondi, C. S.; Annand, J. R. M.; Arends, H. J.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cividini, F.; Costanza, S.; Collicott, C.; Denig, A.; Downie, E. J.; Drexler, P.; Ferretti-Bondy, M. I.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Günther, M.; Gurevich, G. M.; Hamilton, D.; Hornidge, D.; Huber, G. M.; Käser, A.; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Krusche, B.; Lazarev,A. B.; Linturi, James M.; Lisin, V.; Livingston, K.; Lutterer, S.; MacGregor, I. J. D.; Mancell, J.; Manley, D. M.; Martel, P. P.; Metag, V.; Meyer, W.; Miskimen, R.; Mornacchi, E.; Mushkarenkov, A.; Neganov, A. B.; Neiser, A.; Oberle, M.; Ostrick, M.; Otte, P. B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S. N.; Rajabi, A.; Reicherz, G.; Ron, G.; Rostomyan, T.; Sarty, A.; Sfienti, C.; Sikora, M. H.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strub, Th.; Supek, I.; Thiel, A.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu. A.; Wagner, S.; Walford, N. K.; Watts, D. P.; Werthmüller, D.; Wettig, J.; Wolfes, M.; Zana, L. (American Physical Society, 2017-05-01)
    Precise helicity-dependent cross sections and the double-polarization observable E were measured for η photoproduction from quasifree protons and neutrons bound in the deuteron. The η → 2γ and η → 3π0 → 6γ decay modes ...

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