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- Surface Plasmon (3)
- Climatology (2)
- Environmental Science (2)
- Abuja (1)
- Cassava Mash (1)
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- Climatic Variations (1)
- Climatic parameters (1)
- Crop yields and implications (1)
- Crop zones FCT (1)
- Cultivated Land (1)
- Cyanide (1)
- Desertification (1)
- Dewatering (1)
- Dynamics (1)
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- Environmental Deredation (1)
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- GIS (1)
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- Land use and land cover (1)
- Landuse (1)
- Long-term emission; Emission source identification; Material emission signature; VOC; PTR-MS (1)
- Masterplan (1)
- Patterns (1)
- Periodicity index (1)
- Precipitation (1)
- Prevention (1)
Articles 1 - 11 of 11
Full-Text Articles in Engineering
An Assessment Of The Effects Of Desertification In Yobe State, Nigeria, Jibril Musa Phd
An Assessment Of The Effects Of Desertification In Yobe State, Nigeria, Jibril Musa Phd
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
Desertification is one of the most serious environmental and socio-economic problems of our time. Desertification describes circumstances of land degradation in arid, semi-arid and dry sub-humid regions resulting from the climatic variation and human activities. The fundamental goal of this thesis was to assess the effects of desertification in Yobe State, Nigeria. The present threat of desertification in the sahel has reached an alarming stage where crops cultivation and animal rearing/grazing are no more productive, soil has lost its nutrient/fertility, various infrastructure had given way because of windstorm from the neighbouring Niger Republic and sand dunes had taken over. The …
Using Remote Sensing Data To Improve Rice Production In Kutigi, Niger State, Nigeria, Jibril Musa Phd, M B. Yunusa
Using Remote Sensing Data To Improve Rice Production In Kutigi, Niger State, Nigeria, Jibril Musa Phd, M B. Yunusa
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
This research work looked in the used of Remote Sensing to improve Agricultural production in Kutigi, Niger State. The aim of the study is to use remote sensing to improve rice farming activities in Kutigi, Niger State. It is very important to identify such methods to improve Agricultural production because experts are always interested in new researches and findings to better the standard of living in any environment. In view of this, Remotely-sensed data could be used or employed to elevate most of these agricultural problems in Kutigi through the following objectives: Using Landsat imagery to assess the present landuse …
Effect Of Paired Apertures In A Periodic Hole Array On Higher Order Plasmon Modes, Fang-Tzu Chuang
Effect Of Paired Apertures In A Periodic Hole Array On Higher Order Plasmon Modes, Fang-Tzu Chuang
Fang-Tzu Chuang
We demonstrate that the transmission of higherorder surface plasmon modes in the mid-infrared range can be enhanced through rectangular hole array on the basis of paired apertures. Experiments prove that enhanced high-order transmission can be generated by either identical shapes or combinations of different hole shapes in pairs. The structure factor is adopted to explain the observed intensity of enhanced transmission. Numerical simulations of the enhanced secondorder mode verify a significant field enhancement in a unit cell of pairs. It is clarified that the separation between the paired apertures and the paired resonance is the key to determine certain higher-order …
Variations In Climatic Parameters And Food Crop Yields: Implications On Food Security In Benue State, Nigeria., Emmanuel Adamgbe, Fanan Ujoh
Variations In Climatic Parameters And Food Crop Yields: Implications On Food Security In Benue State, Nigeria., Emmanuel Adamgbe, Fanan Ujoh
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
Agricultural production in Nigeria like in other developing countries is highly vulnerable to variations in climatic parameters which may have inverse or direct effect on the performance of food crops. This paper examines the patterns and trends of the variations in the climatic parameters and the implications of such variations on efficient yield rates of some food crops in Benue State using data on climatic variables (rainfall, temperature, sunshine) and the yield of some crops per hectare for 25 years (1986-2010). Data on the climatic variables were collected from the Nigerian Meteorological Agency, AirForce Base, Makurdi while the data on …
Two Infrared Emission Modes With Different Wavelengths And Orthogonal Polarization In A Waveguide Thermal Emitter, Fang-Tzu Chuang
Two Infrared Emission Modes With Different Wavelengths And Orthogonal Polarization In A Waveguide Thermal Emitter, Fang-Tzu Chuang
Fang-Tzu Chuang
This study investigates a Au/SiO2/Au waveguide thermal emitter incorporating a metallic grating embedded in the SiO2 layer. The metal grating acts as a beam splitter, dividing the device into two waveguide structures determined by the polarization of the waveguide modes. The thermal radiation spectrum exhibits two peaks with orthogonal polarization. The emitted wavelengths of the two waveguide modes can be adjusted by controlling the thickness of the SiO2 layers on both sides of the metallic grating during the fabrication process. The emission peaks have ratios of the full width at half maximum to the peak wavelength of 0.057 and 0.05 …
Preventing Occupational Ailments And Disorders Associated With Cassava Mash Dewatering Techniques, Oladele Peter Kolawole Dr.
Preventing Occupational Ailments And Disorders Associated With Cassava Mash Dewatering Techniques, Oladele Peter Kolawole Dr.
Oladele Peter Kolawole Ph.D
Methods in use to reduce the cyanide level in cassava were found to be dangerous to the processors. To reduce occupational hazards, cassava processors sometimes wear protective coverings such as hand gloves, overall, mouth/nose hood, eye goggles which are not comfortable. Each of the steps in cassava processing stages exposes workers to various occupationally related ailments and disorders of ergonomic origin. The operators of dewatering tools are at the risks of suffering from different ailments.The traditional processors still depend on the old technique and resources. Workers are often exposed to cyanide and many are scared of the toxic effect of …
Nanoprojection Lithography Using Self-Assembled Interference Modules For Manufacturing Plasmonic Gratings, Fang-Tzu Chuang
Nanoprojection Lithography Using Self-Assembled Interference Modules For Manufacturing Plasmonic Gratings, Fang-Tzu Chuang
Fang-Tzu Chuang
Abstract—A new nanoprojection lithography (NPL) is proposed to manufacture plasmonic nanogratings. Here, low-cost self-assembly elastomeric polydimethylsiloxane wavy structures are used as the interference modules, with their periods and amplitudes largely controlled by the applied mechanical strain in the synthesis process. Well defined plasmonic grating couplers with desired feature sizes and wavelengths of operation were obtained. This NPL may enable large-area and flash manufacturing of plasmonic nanogratings with tunable array periods.
Model-Based Approach To Account For The Variation Of Primary Voc Emissions Over Time In The Identification Of Indoor Voc Sources, Kwanghoon Han
Model-Based Approach To Account For The Variation Of Primary Voc Emissions Over Time In The Identification Of Indoor Voc Sources, Kwanghoon Han
Kwanghoon Han
The study objectives were to improve the understanding of the long-term variation of VOC emission chromatograms of building materials and to develop a method to account for this variation in the identification of individual sources of VOC emissions. This is of importance for the application of the source identification method since materials age over time in real indoor environments. The method is based on the mixed air sample measurements containing pollutants from multiple aged materials and the emission signatures of individual new materials determined by PTR-MS. Three emission decay source models were employed and evaluated for their ability to track …
Dynamics Of Land Use/Land Cover Changes And Its Implication On Food Security In Anyigba, North Central, Nigeria, Tokula E. Arome, Sunday P. Ejaro (Phd)
Dynamics Of Land Use/Land Cover Changes And Its Implication On Food Security In Anyigba, North Central, Nigeria, Tokula E. Arome, Sunday P. Ejaro (Phd)
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
This study assessed land use/land cover changes and its effect on Agricultural land in Anyigba. The objectives were to identify and delineate different land use / land cover categories, assess the rate of change that occurred and examine the impact of land use/land cover change on food security using satellite remote sensing data collected at three different years (1987 Land sat TM, 2001 Land Sat TM and 2011 Land Sat ETM). The study utilized GIS software such as Idrisi Andes academic and ArcGIS 9.3. The study area covers approximately 31.8km2, and four major land use/cover classes were utilized (built up, …
Socio-Economic Effects Of Demolishing Squatter Settlements And Illegal Structures In Abuja Metropolis, Federal Capital Territory, Nigeria, Ishaku Iy Mallo Phd, Victor G. Obasanya
Socio-Economic Effects Of Demolishing Squatter Settlements And Illegal Structures In Abuja Metropolis, Federal Capital Territory, Nigeria, Ishaku Iy Mallo Phd, Victor G. Obasanya
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
Abuja the Federal Capital Territory and study area is located between latitudes 8o25’ and 9o25’ North of the Equator and longitudes 6o45’ and 7o45’ East of the Greenwich Meridian. The study was carried out in Abuja Phase 1, and it is aimed at highlighting various socioeconomic effects of demolition of illegal structures and informal or squatter settlements on the people within the study area. Data was collected through reconnaissance survey, personal interviews with respondents, and a well laid out questionnaire. The results indicate that the demolition exercise embarked upon by the authorities in the Federal Capital Territory was a response …
Rainfall Variability And Crop Zones Classification For The Federal Capital Territory, Nigeria, Shaibu M. Hassan Phd
Rainfall Variability And Crop Zones Classification For The Federal Capital Territory, Nigeria, Shaibu M. Hassan Phd
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
This study aims at analyzing agro-climatological parameters and establishing a link between some selected agro-climatological indices and sustainability of agricultural production in the Federal Capital Territory (FCT). Two sets of data, climatic and crop yield data were collected and subjected to various agro-climatological analyses. Agro-climatological analyses include the derivation of Onset, Cessation and Length of Rainy Season (LRS), Seasonality Index, Drought Index and Precipitation Periodicity Index. The statistical analyses include monthly and annual means, deviation from the mean, trend line. The result of moisture index in line with crops optimum moisture requirement was used to classify the Territory into agro-climatic …