检索结果-南通市图书馆

Modeling microwave drying kinetics and moisture diffusivity of Mabonde banana variety

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2014年第6期7卷 107-113页

作者： adewale O.omolola Afam I.O.Jideani Patrick F.Kapila Department of Food Science and Technology School of AgricultureUniversity of VendaThohoyandou 0950South Africa Department of Agricultural and Rural Engineering School of AgricultureUniversity of VendaThohoyandou 0950South Africa

This study investigates the microwave drying kinetics of thin layer Mabonde banana variety(MBV)at power levels between 100 and 300 *** mathematical drying models:Wang and Singh,Verma,Two-term,Page,Two term exponential,and Logarithmic models were fitted to experimental drying data obtained from the *** statistical consistency of the models was determined using statistical parameters including coefficient of determination,mean bias error,root mean square error,and reduced Chi *** migration from banana slices was described using the Fick’s diffusion *** effective diffusivity was *** results indicated that drying took place largely in the falling rate *** time required to reduce the moisture of banana to a certain level was dependent on the microwave output,being the longest at 100 W and shortest at 300 *** effective moisture diffusivity increased with increasing microwave power with values at 4.89×10^(-10),1.09×10^(-9) and 1.69×10^(-9) m^(2)/s at 100,200,and 300 W,*** Wang and Singh model gave the best results for the description of thin layer drying of MBV.

关键词： Mabonde banana variety microwave drying models drying kinetics effective moisture diffusivity

Numerical Analysis of Thermo-Elastic Contact Problem of Disc Brakes for Vehicle on Gradient Surfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Engineering and Technology 2016年第1期4卷 51-58页

作者： Moses Omolayo Petinrin adewale Adedayo Oyedele olusegun Olufemi Ajide Department of Mechanical Engineering University of Ibadan Ibadan Nigeria Prototype Engineering Development Institute National Agency for Science and Engineering Infrastructure Ilesa Nigeria

In this study, the thermo-elastic effects of frictional heat generation in a disc brake system due to braking actions were simulated. The mathematical model that defined the problem was developed from the kinetic and potential energies of moving vehicles on the gradient surfaces. This problem was solved for the selected geometry of disc brake and pad with their material properties selected from existing literatures using the finite element method and the computational results were obtained. The thermal deformation obtained was in good agreement with similar literature results. Also, for the same braking period and conditions, the results showed that a vehicle ascending a hill gave a higher temperature rise, Von Mises stress and thermal deformation on brake contact surfaces than when descending hill. Therefore, the braking period required to bring a moving vehicle in ascendent motion to a lower speed is expected to be shorter because of the gravity effect than horizontal motion, while descendent motion requires longer braking period.

关键词： Braking Action Frictional Heat Gradient Thermal Load Thermo-Elastic

Influence of Intercrop Population and Applied Poultry Manure Rates on Component Crops Productivity Responses in a Snake Tomato/Celosia Cropping System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2015年第7期6卷 1040-1057页

作者： olusegun Olufemi Olubode Temitayo Ayobami Ogunsakin adewale Waheed Salau Federal University of Agriculture Abeokuta Nigeria

Productivity responses using organic approaches will assist to elucidate crop responses under different intercrop population levels. Experiments were conducted to determine the growth, yield and productivity responses of component crops in snake tomato/celosia mixtures to intercrop population and organic manure application rates. The 4 × 4 factorial experiment arranged in completely randomized design (CRD) was replicated three times. The snake tomato using potting media was cultivated in 2013 and 2014 at 100,000 plants/ha (one plant/pot) alongside intercrop celosia at three population levels of 100,000 (P1), 200,000 (P2) and 300,000 plant/ha (P3) (10, 20 and 30 plants/pot respectively) where sole crops (P0) served as control. The crop mixture was supplied with poultry manure (PM) at 5 (F1), 10 (F2) and 20 t/ha (F3) using the unfertilized (0 t/ha-F0) as control. The result showed that plants in “year II” had longer vines, thicker girth and more side-vines while those in “year I” had more leaves, more male/female flowers, longer and thicker fruit sizes and heavier fruit yield. Intercropping with celosia at P1 produced plants with thicker girth and more leaves, plants at P1 - P3 had more side-vines while all intercropped plots had more female flowers, but P1 had thicker fruit girth compared to sole crops. Plants with F3 had longer vine length, more leaves and more number of side-vines, more female flowers, longer fruits, thicker fruit girth and heavier fruit yield, but those with F1 or F3 had thicker girth compared to other rates while those with F2 had better productivity advantage with LER and ATER at >1.0. In conclusion, snake tomato and celosia in crop mixture were best with F2 and F3 respectively, although intercropping retarded growth and yield of the component crops but P1 was comparable with sole.

关键词： Celosia Growth Intercrop Population Productivity Indices Snake Tomato Yield

An Assessment of the Relationship between Built Environment and Socioeconomic Factors with the Incidence of Meningococcal Meningitis in Kaduna Urban Area, Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geographic Information System 2023年第2期15卷 175-195页

作者： Emmanuel Tanko Umaru Henry Ojobo adewale Alade olusegun Idowu Owoeye Nicholas Osagie Ebehikalu Department of Urban and Regional Planning Federal University of Technology Minna Niger State Nigeria Department of Architecture Faculty of Environmental Science Kaduna State University Kaduna Nigeria Department of Urban and Regional Planning University of Lagos Lagos Nigeria Department of Geography and Environmental Management University of Abuja Abuja FCT Nigeria

Meningococcal meningitis is an airborne disease that has been a threat to human life in many regions of the world, especially in West Africa. The disease has caused permanent physical impairment to some of its victims and many lives have been lost due to the disease. Factors that are associated with the incidence of the disease which are geographically referenced include built environment, geographical location and climatic conditions. Others are socioeconomic and demographic factors. This study established the relationship between built environment and socioeconomic factors with the incidence of the disease. Data that were used include the incidences of the disease from 2007 to 2011, housing conditions, population density, number of house ownership, employment, income level, and the number of hospitals, schools and refuse dumps. Neighborhoods were used as the unit of analysis in the study. The method of analyzing the data includes factor analysis and some statistical techniques in Geographical Information System such as the Ordinary Least Square (OLS). The findings of the study reveal the spatial variations of the incidence of Meningococcal meningitis in Kaduna Urban Area (KUA). The study recommends that there should be strict observance of the development control regulations especially at the high density residential neighborhood. The model can also be used for other communicable disease to ensure the health of the public.

关键词： Meningococcal meningitis Epidemic Neighbourhood Spatial

An Assessment of the Relationship between Built Environment and Socioeconomic Factors with the Incidence of Meningococcal Meningitis in Kaduna Urban Area, Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论