Staff Publications: Recent submissions

Now showing items 241-260 of 949

    • Interferometry Analysis of Cellophane Birefringence 

      Kinyua, Dickson M.; Rurimo, Geoffrey K.; Karim, Patrick M.; Maina, Stephen N.; Ominde, Calvin F. (Optics and Photonics Journal, 2013-10)
      This paper reports on a simple approach of determining the ability of a transparent material, such as cellophane to rotate the direction of polarization of a light beam. In order to determine the birefringence of such a ...

    • Thermal Stress Monitoring on Piston Rings by Real Time Holographic Interferometry 

      Maina, Stephen N; Rurimo, Geoffrey K; Karimi, Patrick M; Kinyua, Dickson Mwenda; Ominde, Calvin F (Scientific Research Publishing, 2013)
      In this paper, real time holographic Interferometry (RTHI) technique was used to monitor the thermal stress on the piston rings. The piston rings holograms were recorded and the holographic plate replaced on the holder ...

    • Control of the polarization direction of isolated attosecond pulses using inhomogeneous two-color fields 

      Njoroge, Stephen Maina; Yuan, Hua; Dickson, Kinyua; Zhang, Qingbin; Lan, Pengfei (Nature Publishing Group, 2019)
      We theoretically demonstrate the control of the polarization direction of isolated attosecond pulses (IAPs) with inhomogeneous two-color fields synthesized by an 800-nm fundamental pulse and a 2000- nm control pulse having ...

    • Influences of Ga Doping on Crystal Structure and Polarimetric Pattern of SHG in ZnO Nanofilms 

      Long, Hua; Habeeb, Ammar A.; Kinyua, Dickson M.; Wang, Kai; Wang, Bing; Lu, Peixiang (Nanomaterials, 2019-06-21)
      The second-harmonic generation (SHG) in gallium doped ZnO (GZO) nanofilms was studied. The Ga doping in GZO nanofilms influenced the crystal structure of the films, which affected SHG characteristics of the nanofilms. ...

    • Influences of Ga doping on crystal structure and polarimetric pattern of SHG in ZnO nanofilms 

      Long, Hua; Habeeb, Ammar Ayesh; Kinyua, Dickson Mwenda; Wang, Kai; Wang, Bing; Lu, Peixiang (Multidisciplinary Digital Publishing Institute, 2019)
      The second-harmonic generation (SHG) in gallium doped ZnO (GZO) nanofilms was studied. The Ga doping in GZO nanofilms influenced the crystal structure of the films, which affected SHG characteristics of the nanofilms. In ...

    • Generalized relativistic dynamics in a non-inertial reference frame 

      Wamalwa, Dismas Simiyu; Omolo, Joseph Akeyo (Springer-Verlag, 2010)
      Generalized relativistic field equations have been derived for dynamics in a non-inertial reference frame interpreted as a Finsler space where events are specified by both spacetime coordinates and corresponding velocities ...

    • Tuning the photoinduced charge transfer from CdTe quantum dots to ZnO nanofilms through Ga doping 

      Kinyua, Dickson Mwenda; Niu, Le; Long, Hua; Wang, Kai; Wang, Bing (Elsevier, 2019)
      Tuning the charge transfer rate between quantum dots (QDs) and metal oxide (MO) is important for improving the performances of QDs-MO devices. And tailoring the energy band of MO is one way to tune the charge transfer rate. ...

    • Gigahertz acoustic vibrations of Ga-doped ZnO nanoparticle array 

      Kinyua, Dickson Mwenda; Long, Hua; Xing, Xiangyuan; Njoroge, Stephen; Wang, Kai; Wang, Bing; Lu, Peixiang (IOP Science, 2019)
      In this work, we present an experimental study on the acoustic vibrations of ZnO nanoparticles array with different concentration of Ga dopings by using femtosecond pump-probe technique. The Ga-doped ZnO (GZO) nano-triangle ...

    • On The Existence of a Non-Relativistic Hermitian Time Operator 

      Carringtone, Kinyanjui; Wamalwa, Dismas S (2015)
      The existence of a hermitian time operator is proposed in the framework of non-relativistic quantum mechanics. The Heisenberg equation of motion is shown to yield constant rate of flow of time. It is shown to yield results ...

    • Schwarzschild solution of the modified Einstein field equations 

      Kinyanjui, Carringtone; Wamalwa, Dismas S (2017)
      A reformulation of the Schwarzschild solution of the linearized Einstein field equations in post-Riemannian Finsler spacetime is derived. The solution is constructed in three stages: the exterior solution, the event-horizon ...

    • Relativistic Dynamics in a Matter-Dominated Friedmann Universe 

      Langa, M; Wamalwa, Dismas S; Mito, C (Springer India, 2017)
      The energy density of the universe is estimated to be composed of 68% dark energy. Dark energy is associated with the accelerated expansion of the universe. In this work, we consider the evolution of the number density ...

    • Monitoring and Supervision of Adult Basic Education: District Education Officers’ Dilemma in Machakos County of Kenya 

      Nzinga, Edward; Njagi, Kageni (Scholars Academic and Scientific Publishers, 2017)
      The purpose of the study is to explore challenges facing District Adult and Continuing Education Officers (DACEO’s) in Monitoring and Supervision of Adult Basic Education in Machakos County in Kenya. The study used descriptive ...

    • An Examination of the Factors that Shape the Engagement of Faculty Members and Academic Staff 

      Lunsford, Crystal G.; Omae, Hilda Nyougo (Springer, 2011)
      In this article we discuss some of the factors that influence how faculty members and academic staff at Michigan State University connect their scholarly activities to external audiences. Logistic regression was used to ...

    • Fraud Vulnerability of Kenya’s National Identity Card System 

      Cherus, Joel; Njagi, Kageni; Githeko, Jason; Siror, Joseph (2014)
      Modern crimes such as terrorism, money laundering and illegal immigration are majorly committed by individuals who falsify their identities by forging identification documents. One such document that is a target ...

    • Drug Abuse and Addiction Effects on Human Body 

      Njati, Ibuathu C. (Journal Of Humanities And Social Science, 2016)
      Drug and substance abuse has been of great concern to institutions, families, employers and employees alike. However, these concerns have to be addressed through dissemination of relevant knowledge ...

    • Nomadic Girls' Education Paperback 

      Kalla, Paul Huka (LAP LAMBERT Academic Publishing, 2014)
      The right to education is clearly articulated in core international and national instruments. The vital role played by education in the socio-economic development of every country is universally recognized. There is a close ...

    • Factors Influencing the Intention to Use Location-Based Mobile Advertising among Micro-Enterprises in Kenya 

      Thiga, Moses M; Githeko, Jason M; Siror, Joseph K; Njagi, Kageni (African Journal of Information Systems, 2016)
      The use of location-based mobile advertising to deliver context specific information from businesses to clients has the potential to help them increase revenues, personalize offerings and reduce marketing ...

    • Your Mind Your Gold Mine 

      Thuranira, Mercy Nkatha (MaterPrint Graphics Ltd., 2021)

    • Marketing a Brand in Crisis 

      Mugwika, Gatobu (Academia Letters, 2021)

    • Meaning Loss in Interpretation : A Judgment Ruling in Nyando Magistrate’s Court Kenya 

      Owiti, Beatrice (International Science, 2014)
      Abstract Research on interpretation in Kenyan Courts is limited and there are none that examine Dholuo-English interpretations. Consequently, there is a pressing need to have a broad and deep understanding of the linguistic ...