Journal Articles: Recent submissions

Now showing items 2461-2480 of 4120

    • The transition process: The early years of being a teacher 

      Zachariah O Wanzare (Springer, Dordrecht, 2007)

    • Adults helping adults: Teacher-initiated supervisory option for professional development 

      Zachariah Wanzare, BO Rari (Academic Journals, 2011-08-31)
      This paper discusses peer supervision among teachers. It considers the foci, practices, problem and potential importance of peer supervision in facilitating professional growth teachers. Peer supervision or peer coaching ...

    • Influence of Water Availability on Food Crop Production in Semi-Arid Areas in Kibwezi District, Makueni County, Kenya 

      Esnah Bosire, Boniface Oindo, Irene Mutavi (Arts Humanit, 2015)
      Ecosystems provide essential services like water regulation and other processes which sustain and fulfill human life by directly or indirectly supporting humans‟ survival and quality of life. However, there is insufficient ...

    • Instructional supervision in public secondary schools in Kenya 

      Zachariah Wanzare (Sage Publications, 2012-03)
      This article reports some findings of study regarding practices and procedures of internal instructional supervision in public secondary schools in Kenya. The findings are part of a large-scale project undertaken in Kenya ...

    • THE DIMINISHING WEALTH: THE CASE OF NYAMASARIA WETLANDS IN KISUMU TOWN 

      Daniel O Odaro (Egerton university press, 2007-04)
      Although household food security may not capture all dimensions of food such as availability, access and utilisation; inability of households to put enough and quality food on the table is a manifestation of bad food ...

    • A Functional Calculus for (α, α+ 1)− type R Operators 

      Paul O Oleche, John O Agure (Int. Journal of Math. Analysis,, 2010)
      A closed densely defined operator H, on a Banach space X, whose spectrum is contained in R and satisfies (z − H)−1 ≤ c z α | z|β ∀ z ∈ R with z α := |z|2 + 1 (1) for some α , β ≥ 0; c > 0, is said to ...

    • On the convexity of Stampfli's numerical range 

      JO Agure (Cambridge University Press, 1996-02)
      This paper investigates a certain type of numerical range introduced by Stampfli. In particular, we investigate the convexity of this set of elements of operators on Hilbert spaces and its relationship to the algebra ...

    • Norm of a derivation and hyponormal operators 

      JO Bonyo, JO Agure (Int J Math Anal, 2010)
      We characterize when the norm of inner derivation on a norm ideal equals that on the quotient algebra. We further investigate norms of inner derivations implemented by normal and hyponormal operators on norm ...

    • Norms of Inner Derivations on Norm ideals 

      JO Bonyo, JO Agure (Int. Journal of Math. Analysis, 2010)
      Let B(H) be the algebra of bounded linear operators on a Hilbert space H and J be a norm ideal in B(H). We investigate the relationship between the diameter of the numerical range of an operator A ∈ B(H) and the norm ...

    • Responses of ecosystem carbon dioxide fluxes to soil moisture fluctuations in a moist Kenyan savanna 

      DO Otieno, GO K'Otuto, JN Maina, Y Kuzyakov, JC Onyango (Cambridge University Press, 2010-11-01)
      Measurements were conducted within a fence-exclosure between February 2008 and July 2009 to investigate the influence of soil moisture on ecosystem CO₂ fluxes in a Themeda triandra-dominated grassland of a humid Kenyan ...

    • Aspects of (pq) summing multipliers 

      Shem Aywa, JO Agure, W Rao (Vdm verlag Dr. Muller aktiengeselischaft & co. kg., 2010)
      A sequence (uj)j2N of operators in L(X; Y ) is a (p; q)-summing multi- plier (or (p; q)-summing sequence of operators), in short (uj) 2 `¼p;q (X; Y ), if there exists a constant C > 0 such that, for any ¯nite collection ...

    • Carbon dioxide exchange and biomass productivity of the herbaceous layer of a managed tropical humid savanna ecosystem in western Kenya 

      GO K’Otuto, DO Otieno, B Seo, HO Ogindo, JC Onyango (Oxford University Press, 2013-08-01)
      Aims Humid savannas, as a result of high precipitation amounts, are highly productive. They are also hotspots for land use change and potential sources of carbon dioxide (CO2) due to the large soil carbon (C) stocks. ...

    • Orthogonality of elementary operators in normed spaces and their applications 

      NB Okelo, JO Agure (SAMSA 2012 mathematics conference proceedings, 2012-11)
      Malaria is a major public health concern, especially among pregnant women and children under the age of five. It is a leading cause of morbidity and mortality in Malawi, accounting for fourty percent of out-patient ...

    • Deficiency indices and spectrum of fourth order difference equations with unbounded coefficients 

      John Ogonji Agure, David Otieno Ambogo, Fredrick Oluoch Nyamwala (WILEY‐VCH Verlag, 2013-03)
      Using subspace theory together with appropriate smoothness and decay conditions, we calculated the deficiency indices and absolutely continuous spectrum of fourth order difference equations with unbounded coefficients. In ...

    • EFFECTS OF MARKET CHALLENGER STRATEGIES ON PERFORMANCE OF VERNACULAR RADIO BROADCASTING FIRMS IN WESTERN KENYA 

      Beatrice Akoth Awino, Charles Omondi Ondoro, Beatrice Evelyn Abong’o (ijecm, 2018-09-09)
      In Kenya, Radio broadcasting firms have played positive roles in the development of democracy. In 2015 51% of Kenyans listened to radio as their main source of entertainment, beating any other medium. However, there has ...

    • On the norm of elementary operator 

      Denis Njue Kingangi, John Ogoji Agure, Fredrick Oluoch Nyamwala (Scientific Research Publishing, 2014-07-07)
      The norm of an elementary operator has been studied by many mathematicians. Varied results have been established especially on the lower bound of this norm. Here, we attempt the same problem for finite dimensional operators.

    • On the Numerical Range of a Generalized Derivation 

      FM Runji, JO Agure, FO Nyamwala (HIKARI Ltd,, 2017)
      We examine the relationship between the numerical range of the restriction of a generalized derivation to a norm ideal J and that of its implementing elements. Mathematics Subject Classi cation: 47A12; 47B47

    • On the maximal numerical range of elementary operators 

      Flora Mati Runji, John Ogonji Agure, Fredrick Oluoch Nyamwala (Academic Publications, Ltd., 2017-02)
      The notion of the numerical range has been generalized in different directions. One such direction, is the maximal numerical range introduced by Stampfli (1970) to derive an identity for the norm of a derivation on L(H). ...

    • Effects of Structural Viscoelasticity in Non-Divergence free Deformable Porous Media with Incompressible Constituents 

      Micheal Babatunde Oguntola, Mathew Ngugi Kinyanjui, John Agure Ogonji (Global Journal of Pure and Applied Mathematics, 2018)
      In this paper, we investigate the importance of structural viscoelasticity in the mechanical response of deformable porous media with incompressible constituents under sudden changes in the external applied quasi-static ...

    • On Numerical Range of Multiplication Operator 

      Odero Adhiambo Beatrice, JO Agure, FO Nyamwala (International Journal of Mathematical Analysis, 2019)
      Let H be an in nite dimensional complex Hilbert space and A;B 2 B(H) where B(H) is the C -algebra of all bounded linear operators on H. Let MAB : B(H) ! B(H) be a multiplication operator induced by A and B de- ned ...