School of Pure and Applied Sciences: Recent submissions

Now showing items 101-120 of 259

    • Salary Determinants for Higher Institutions of Learning in Kenya 

      Muturi, Bernard; Ngare, Philip (2014)
      There has been a debate over the years on which category of salary determinants best predicts an employee salary, that is, whether it is organizational characteristics or individual attributes. This study adopts a hybrid ...

    • Indifference Pricing of Contingent Claims on NIG L´evy Model 

      Ngare, Philip (2012)
      We develop an attractive and tractable model to describe the financial time series of stock prices observed at the Nairobi exchange market then price financial derivatives on the underlying stock. The stock price process is ...

    • Crank Nicolson Approach for the Valuation of the Barrier Options 

      Babasola, O.L.; Ngare, Philip; Owoloko, E.A. (Research India Publications, 2018)
      Barrier options are considered to be cheaper than the standard options as they provide lower premiums which make them to be attractive to hedgers in the financial market. In this article, the numerical procedure for the ...

    • Modelling Inflation Rate Volatility in Kenya Using Arch -Type Model Family 

      Okeyo, Johnson; Ivivi, Mwaniki; Ngare, Philip (2016)
      This paper describe the empirical study based on financial time series modelling with special application to modelling inflation data for Kenya. Specifically the theory of time series is modelled and applied to the ...

    • Pricing floating strike lookback put option under heston stochastic volatility 

      Wirtu, Teferi Dereje; Ngare, Philip; Kube, Ananda (International Research Publication House, 2017)
      The pricing problems of the exotic options in the finance do not have the analytic solutions under stochastic volatility and so it is difficult to calculate the option prices or at least it requires much of time to compute ...

    • Determinants of Mobile Money Remittance in East Africa 

      Correia, Oscar; Ngare, Philip; Sindiga, Durvine; Otwoma, Desmond (2017)
      Globally, remittances represent an important flow of international financial resources. In the East African trading bloc, the dynamic population movements between countries has led to widespread distribution of population ...

    • A Multicurve Cross-Currency LIBOR Market Model 

      Wamwea, Charity; Ngare, Philip; Bidima, Martin Le Doux Mbele (Hindawi, 2019)
      Afer the dawn of the August 2007 fnancial crisis, banks became more aware of fnancial risk leading to the appearance of nonnegligible spreads between LIBOR and OIS rates and also between LIBOR of diferent tenors.Tis ...

    • Optimal Investment Strategy under Stochastic Interest Rates 

      Mtunya, Adeline Peter; Ngare, Philip; Nkansah-Gyekye, Yaw (Scientific Research Publishing, 2017)
      We study how firms’ management can make effective investment decision under the influence of random interest rates. We define the threshold interest rate value below which investment can be effectively done and above ...

    • A Poisson-Gamma Model for Zero Inflated Rainfall Data 

      Dzupire, Nelson Christopher; Ngare, Philip; Odongo, Leo (Hindawi, 2018)
      Rainfall modeling is signifcant for prediction and forecasting purposes in agriculture, weather derivatives, hydrology, and risk and disaster preparedness. Normally two models are used to model the rainfall process as a ...

    • Regime-Switching Temperature Dynamics Model for Weather Derivatives 

      Gyamerah, Samuel Asante; Ngare, Philip; Ikpe, Dennis (Hindawi, 2018)
      Weather is a key production factor in agricultural crop production and at the same time the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production ...

    • Pricing Interest Rate Caps and Floors under the Pearson-Sun Interest Rate Model 

      Ghaniyyu, Abubakari Abdul; Ngare, Philip; Mung’atu, Joseph (2018)
      Interest rate derivatives are largely used to manage interest rate risk. For this reason, the accuracy of their pricing is very important as mispricing can result in huge financial losses. In this study, the Pearson-Sun model, ...

    • Financial Literacy and Retirement Planning in the Informal Sector in Kenya 

      Githui, Thomas; Ngare, Philip (2014)
      Old age dependency has become a major issue of concern to governments today. This is because a large number of retirees lack any form of regular income to sustain them in retirement. Kenya has one of the highest levels ...

    • Polarization independent and tunable plasmoninduced transparency for slow light 

      Yang, Hanning; Owiti, Edgar O; Yenpo, Pai; Sun, Xiudong (Royal Society of Chemistry, 2017)
      A novel metamaterial composed of a Ag nanoprism periodic tetramer is proposed in this paper. Themetamaterial has high structural symmetry and shows polarization independent plasmon-inducedtransparency (PIT), demonstrated ...

    • Polarization Converter with Controllable Birefringence Based on Hybrid All-Dielectric-Graphene Metasurface 

      Owiti, Edgar O; Yang, Hanning; Liu, Peng; Ominde, Calvine F (Nanoscale Research Letters, 2018)
      Previous studies on hybriddielectric-graphenemetasurfaceshavebeenusedtoimplementinducedtransparency devices,while exhibiting high Q-factors based on trapped magnetic resonances.Typically,the transparencywindows are ...

    • Broadband quarter-wave plate based on dielectric-embedded plasmonic metasurface 

      Owiti, Edgar O; Yang, Hanning; Ominde, Calvine F; Sun, Xiudong (Royal Society of Chemistry, 2017)
      High transmission plasmonic and all-dielectric metasurface wave plates have been reported in recentstudies. However, narrow bandwidth and low polarization conversion need to be addressed to attaineven better operation ...

    • Environmental Applications of Poly(amic acid)-based Nanomaterials 

      Okello, Veronica A.; Du, Nian; Deng, Boling; Sadik, Omowunmi A. (Electronic Supplementary Material (ESI) for Journal of Environmental Monitoring, 2011)

    • A New Substrate for Alkaline Phosphatase Based on Quercetin Pentaphosphate 

      Mwilu, Samuel K; Okello, Veronica A.; Osonga, Francis; Miller, Seth; Omowunmi, A. Sadik (2014-05-22)
      We describe the characterization and application of quercetin pentaphosphate (QPP), a new fluorimetric substrate for the detection of alkaline phosphatase (ALP) activity. QPP exhibits major absorbance peaks at 260/ 410 ...

    • Nanostructured Membranes for Water Purification 

      Omowunmi, A. Sadik; Du, Nian; Yazgan, Idris; Okello, Veronica (2014)
      Nanoscale materials can be used to achieve wastewater purification, desalination, and inactivation of pathogenic bacteria and viruses, as well as for the adsorption and/or degradation of contaminants [1 16]. The development ...

    • Green Remediation of Hexavalent Chromium Using Naturally Derived Flavonoids and Engineered Nanoparticles 

      Omowunmi, A. Sadik; Okello, Veronica; Osonga, Francis; Omole, Marcells A.; ’Owino, Isaac K (2014)
      Contaminated ground- and surface water supplies such as the municipalities, wells, lakes, and rivers exhibit various levels of contamination that can pose numerous health risks. The release of contaminants into the environment ...

    • On Changepoint Detection in a Series ofStimulus-Response Data 

      Nyarige, Euna Gesare; Franke, J ̈urgen; Fischer, Alexander (2017)
      n this paper, we demonstrate the power of functional data models for a statistic al analysis of stimulus-response experiments which is a quite natural way to look at this kind of data and which makes use of the full ...