http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/130 Tue, 21 Apr 2026 13:34:48 GMT 2026-04-21T13:34:48Z http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/587 COMPARATIVE MORPHOMETRIC STUDY OF PROBOSCIDEAN DENTITION FROM THE APAK MEMBER OF THE NACHUKUI FORMATION AT LOTHAGAM, KENYA. MBATHA, PAULINE MBETE The early Pliocene interval of the Apak Member at Lothagam, Kenya, documents significant faunal turnover. During this time, wooded savannas and savanna woodlands expanded in eastern Africa, and elephants consequently evolved to better adapt to grazing. It is also the time of the first appearance of the hominin Australopithecus, many modern antelope tribes, new horses, hippos, and pigs. Proboscidean species previously identified from the Apak Member include Deinotherium bozasi, Anancus kenyensis, Stegotetrabelodon orbus, cf. Elephas ekorensis? aff. Loxodonta, Loxodonta exoptata, and several unidentified elephantids. This study describes new proboscidean specimens and compiles a database of proboscideans from the Apak Member at Lothagam. The study focuses on measurements and morphological descriptions of 14 new and 12 previously studied specimens housed at the National Museums of Kenya. Essential features studied include relative height of the crown (hypsodonty index), which is important for grazing animals, and number of molar plates, which increase in more advanced proboscideans. The study further compares the new database, with that of late Miocene Lothagam proboscideans and proboscidean assemblages from nearby sites of similar age, particularly those from other sites in or near Turkana Basin including Kanapoi, Ileret, and South Turkwel. The objectives were to increase our knowledge of the transition from archaic to more advanced proboscideans in Africa and proboscidean cohorts' role in shaping ecosystem changes. The results meaningfully revise upwards, the taxonomic composition of proboscideans in the Apak Member, and reveal a complex relay of primitive to more derived elephants during the early Pliocene, that documents the adaptive response to increased competition among mammals for grazing resources Sun, 01 Jan 2023 00:00:00 GMT http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/587 2023-01-01T00:00:00Z http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/578 COMPARATIVE MORPHOMETRIC STUDY OF PROBOSCIDEAN DENTITION FROMTHE APAK MEMBER OF THE NACHUKUI FORMATION AT LOTHAGAM, KENYA. Mbatha, Pauline Mbete The early Pliocene interval of the Apak Member at Lothagam, Kenya, documents significant faunal turnover. During this time, wooded savannas and savanna woodlands expanded in eastern Africa, and elephants consequently evolved to better adapt to grazing. It is also the time of the first appearance of the hominin Australopithecus, many modern antelope tribes, new horses, hippos, and pigs. Proboscidean species previously identified from the Apak Member include Deinotherium bozasi, Anancus kenyensis, Stegotetrabelodon orbus, cf. Elephas ekorensis? aff. Loxodonta, Loxodonta exoptata, and several unidentified elephantids. This study describes new proboscidean specimens and compiles a database of proboscideans from the Apak Member at Lothagam. The study focuses on measurements and morphological descriptions of 14 new and 12 previously studied specimens housed at the National Museums of Kenya. Essential features studied include relative height of the crown (hypsodonty index), which is important for grazing animals, and number of molar plates, which increase in more advanced proboscideans. The study further compares the new database, with that of late Miocene Lothagam proboscideans and proboscidean assemblages from nearby sites of similar age, particularly those from other sites in or near Turkana Basin including Kanapoi, Ileret, and South Turkwel. The objectives were to increase our knowledge of the transition from archaic to more advanced proboscideans in Africa and proboscidean cohorts' role in shaping ecosystem changes. The results meaningfully revise upwards, the taxonomic composition of proboscideans in the Apak Member, and reveal a complex relay of primitive to more derived elephants during the early Pliocene, that documents the adaptive response to increased competition among mammals for grazing resources. Tue, 25 Oct 2022 00:00:00 GMT http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/578 2022-10-25T00:00:00Z http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/464 MHD TURBULENT FLOW IN PRESENCE OF INCLINED MAGNETIC FIELD PAST A ROTATING SEMI-INFINITE PLATE Chebet Maswai Rency A turbulent incompressible fluid flow past a semi-infinite vertical rotating plate has been investigated, the flow considered is in the presence of a strong inclined constant magnetic field. An induced electric current exists due to the presence of the constant magnetic field. The velocity distribution of the fluid flow past a semi-infinite vertical plate and it's temperature profiles have been determined. Finally, the effects of various parameters like non-dimensional numbers and the angle of inclination of the magnetic field on the flow variables have been determined. The equations governing this problem have been solved numerically using finite difference method because these equations are non-linear and there exists no analytical method of solving them. A sample result of the velocity profiles and temperature profiles have been obtained followed by a graphical representation of the same. It is noted that an increase in the Hall parameter, time and angle of inclination leads to an increase in the primary velocity while an increase in the rotational parameter Er and Eckert number leads to a decrease in the primary velocity profiles. An increase in the rotational parameter and Hall parameter leads to an increase in secondary velocity, Eckert number, time and angle of inclination leads to a decrease in secondary velocity. Increase in Eckert number, time, Hall parameter and rotational parameter leads to an increase in temperature profiles. Thu, 01 Jan 2015 00:00:00 GMT http://repository.tuc.ac.ke:8080/xmlui/handle/123456789/464 2015-01-01T00:00:00Z