The studyinvestigates tourism development in Yobe State with particular reference on Dagona Waterfowl Sanctuary in the Chad Basin National Park.  The study relied on personal observations, questionnaires and interviews to generate useful information with the view to examine the development of tourism potential of Dagona Waterfowl Sanctuary and assess the level of tourism patronage by tourist, as well as to examine the factors impinging on the development of the Sanctuary. Data were collected through structured and unstructured interviews with research participants. A random sampling techniques method was adopted for the data collection.  Purposive sampling techniques was also applied to include persons aged 25 years and have attained secondary school level of education and above. 60 questionnaires were distributed in three locations of GadanKargo, Dala and Dagona villages neighboring communities in the study area, where 15, 15 and 30 questionnaires were allocated to each village respectively, and 52 were retrieved.  Data were analyzed using descriptive approach. About 88% of the people interviewed showed that there is low level of tourist arrival to the Sanctuary, hence, the study identified the effects faced in ensuring tourism development in Yobe State, including insufficient funding, inadequate infrastructure facilities and publicity, and lack of master plan for its physical development among others, indicating the low level of tourism development at the bearest minimum. Appropriate recommendations have been suggested that can be implemented to achieve the objectives of developing tourism in Yobe State of Nigeria.

Emission control strategies are required for continuous increase in gasoline direct Injection (GDI) engines, in view of the new legislation control requirements for the implementation of particle number (PN) and particulate matter (PM). Gasoline particulate filter (GPF) is one of the components that can be used to achieve this emission reduction in particulate matter. The flow of gasses across the gasoline particulate filter (GPF) inan exhaust is accompanied by the contraction/expansion pressure losses which has significant effect on the mechanical efficiency of the engine due to back pressure. Flow rate and pressure loss across the monolith- an exhaust operating conditions- are functions of the exhaust gas distribution.

 This paper is aimed at investigating the expansion /contraction pressure losses in GPFs at different Reynolds number from 200 to 2000which is enough to keep the flow within the laminar regime for samples of different lengths 305mm, 250mm and 200mm.

Pressure tapings were located at the upstream and downstream of the test sample representing the filter scaled up channels to measure the inlet and outlet pressures, and finally, four (4) pressure tapings located along the test sample to capture the respective pressures at each point. These pressure measurements were taken for a ‘flow through’ of 0.5g/s to 4.7g/s which corresponds to the Reynolds numbers from 200 to 2000. The result highlighted the following silence points: Total pressure losses increase with an increase in mass flow rates. The exit (expansion) pressure losses are 2.5 times higher than the entrance (contraction) pressure losses when compared with ‘2 times higher’ prediction recorded in [1] and it varies across the flow rates for the test samples studied.The contraction/expansion pressure drop along the filter is sensitive to the filter length as well as the number of channels in the filter. The inertia loss coefficients are approximately the same for the filters studied.

Internal efficiency is a major concern to many countries desire to provide secondary education to their citizens. However internal inefficiency has been experienced in many countries which is characterised by drop-out rates, repetition and low transition rates. The purpose of this study was to investigate the perception of Early Marriages on internal efficiency in public secondary schools in Narok South Sub-County. The selected indicators of internal efficiency in the study included dropouts’ rates, repetition rates and transition rates. According to Basic Education Statistics Data, Ministry of Education (MOE, 2015) early marriages is a major cultural factor influencing girl’s dropout rates, repetition rates and low transition rates in  public secondary schools in Narok South Sub-County. The study adopted correlational research design. The theoretical framework was the production function theory which bases on the efficiency of a firm. The total target population was 177 of which 34 were principals and 133 class secretaries. The researcher sampled 155 respondents which comprised of 31 principals and 124 class secretaries in public secondary schools in Narok South Sub County. Purposive sampling was used to select the principals while stratified sampling to select the class secretaries according to the classes. Data was collected using interview schedule for principals and questionnaire for the class secretaries. Data was analysed qualitatively and quantitatively. The hypothesis was tested at 0.05 level of significance. The study found out that early marriages had a P-value of 0.01. This indicates a significant perception on internal efficiency in public secondary schools in Narok South Sub-County. The researcher recommended that the government and other stakeholders should enhance internal efficiency by creating awareness to parents on the retrogressive cultural practices in Narok South Sub-County. The ministry of education to increase the number of boarding secondary schools in Narok South Sub-County in order to help students to continue with education without internal inefficiency.