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Techniques in Utilizing Remote Sensor Technology for Precision Crop Production by Farmers as Climate Change Adaptation Strategy in Nigeria

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Agricultural Sciences 2014年第14期5卷 1476-1482页

作者： Florence o. Ifeanyieze Michael E. Ikehi Edward Isiwu Agricultural Unit Department of Vocational Teacher Education University of Nigeria Nsukka Nigeria

This paper focuses on techniques in utilizing remote sensor technology for precision crop production by farmers as climate change adaptation strategy in Nigeria. Descriptive survey research design was adopted for the study and was carried out between August 2013 and May 2014. The findings of the study revealed that 32 items were needed by farmers in utilizing sensory technology for precision crop production. The study recommended that the 32 items identified by the study should be utilized by extension agent in teaching the farmers the use of sensor technology for precision crop production while the farmers should make themselves available for the training.

关键词： Remote Sensor Technology Climate Change Adaptation Precision Farming Crop Production

Growth Pattern in Children with Juvenile Idiopathic Arthritis: A Retrospective Study

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open Journal of Rheumatology and Autoimmune Diseases 2017年第1期7卷 80-95页

作者： Rana A. Alsulami Ahlam o. Alsulami Mohammed A. Muzaffer King Abdulaziz University Jeddah Kingdom of Saudi Arabia Department of Pediatric King Abdulaziz University Hospital Jeddah Kingdom of Saudi Arabia

Aim of this study is to assess growth pattern in children with juvenile idiopathic arthritis (JIA) and factors associated with growth retardation. Methods: A retrospective chart review of all cases of JIA following up at Pediatric Department of King Abdulaziz University Hospital, between July 2000 to July 2016. Demographic, clinical and biological data were collected and analyzed as risk factor for growth retardation. These included age, gender, age at diagnosis, disease duration, type of JIA, the presence of uveitis, rheumatoid factor (RF) positivity, antinuclear antibody (ANA) titer and treatment. Growth pattern was assessed as the percentile for height-for-age, weight-for-age and weight-for-height in reference to the Growth Chart for Saudi Children and Adolescents. Change in percentile rank was divided into 3 categories: regression (a drop of ≥1 percentile);stable (uphold of the same percentile);and progression (change for a superior percentile). Results: A total 78 children were eligible, 52.6% females, mean ± SD age = 9.94 ± 4.92 years, and age at diagnosis = 7.44 ± 4.52 years, mean ± SD [range] disease duration = 2.93 ± 2.70 [6 months;15 years]. The most frequent types of JIA were systemic (33.3%), oligoarticular (30.8%) and polyarticular negative RF (26.9%). other parameters included positive ANA in 41.0%, positive RF in 7.7% and uveitis in 9.0%. The most frequent treatment was methotrexate (59.0%), followed by biological therapy (47.4%), non-steroid anti-inflammatory drugs (43.6%) and prednisolone (33.3%). Growth data were available for 67 (85.9%) children, and assessments showed 36% cases of break of the growth curve in both height-for-age and weight-for-age percentiles and 31% in weight-for-height percentiles. In all three parameters, there were shifts towards lower percentiles from time of diagnosis to last follow-up, in both males and females. Correlation and regression analysis showed low age at diagnosis and disease duration to be significant predictor

关键词： Juvenile Idiopathic Arthritis Growth Pattern

An Algebra of ontologies Approximation under Uncertainty

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International Journal of Intelligence Science 2014年第2期4卷 54-64页

作者： A. F. Donfack Kana B. o. Akinkunmi Department of Mathematics Ahmadu Bello University Zaria Nigeria partment of Computer Science University of Ibadan Ibadan Nigeria

ontologies are widely used in modeling the real world for the purpose of information sharing and reasoning. Traditional ontologies contain only concepts and relations that describe asserted facts about the world. Modeling in a dynamic world requires taking into consideration the uncertainty that may arise in the domain. In this paper, the concept of soft sets initiated by Molodtsov and the concept of rough sets introduced by Pawlack are used to define a way of instantiating ontologies of vague domains. We define ontological algebraic operations and their properties while taking into consideration the uncertain nature of domains. We show that, by doing so, intra ontological operations and their properties are preserved and formalized as operations in a vague set of objects and can be proved algebraically.

关键词： ontologies Description Logics Soft Sets Rough Sets Uncertainty

Helium,Neon,and Argon in the Iron Meteorites Dongling,Nantan and Ningbo

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Acta Geochimica 1986年第4期 320-330页

作者： H.W.WEBER o.BRAUN F.BEGEMANN Max-Planck-Institutfür Chemie Saarstraβe 23 D-6500 Mainz. F. R. C.

The light noble gases He, Ne and Ar have been measured in the iron meteorites Dongling, Nantan andNingbo. Dongling and Ningbo show a deficit of cosmic-ray that produced;He of ca. 30% and 10%,respectively, which is argued to be caused by the loss of;H （tritium） from the meteoroids during the time oftheir exposure to the cosmic radiation. Nantan has the lowest eontent of noble gases as yet reportcd for anyiron meteorite. Cosmogenic;He and;Ar are only about 1/5000 of those in Dongling which has particularlyinteresting implications if the two meteorites belong to the same fall. In addition, Nantan contains non-spallogenic;He which we believe to be of radiogenic origin. This radiogenic;He, together with a U-content of2.6×10;g/g yields a;He retention age close to the cosmic-ray exposure age of Dongling. If Donglingand Nantan were part of the same meteoroid, this result would indicate that He retention in the meteoroidstarted only at or after onset of the exposure to the cosmic radiation. on the other hand, if the He retentionage were 4,500 Ma, a U-content of less than 7.2×10;g/g is required to explain the non-cosmogenic;Hepresent. An upper limit to the number of transuranium or superheavy-element atoms which have deeayed byx-emission in Nantan since onset of He retention is 2×10;per gram.

关键词： Helium,Neon,and Argon in the Iron Meteorites Dongling,Nantan and Ningbo

Geochemistry of Muro Banded Iron-Formation, Central Nigeria

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International Journal of Geosciences 2012年第5期3卷 1074-1083页

作者： John Adeyinka Adekoya Chukwuemeka Tony okonkwo Mohammed o. Adepoju Department of Applied Geology Federal University of Technology Akure Nigeria

Muro Banded Iron-Formation occurs in the Proterozoic Toto Schist Belt, central Nigeria. It consists preponderantly of oxide facies and minor carbonate facies. The oxide facies is made up of alternating bands of quartz (metachert) with those of hematite + magnetite + martite ± goethite, chlorite, pyrrhotite and garnet. The carbonate facies consists of quartz (metachert) + siderite ± goethite. In the oxide facies the total iron content (Fe2o3t) ranges from 33.95% to 48.08% and the Sio2 content from 50.33% to 64.50%. In the case of the carbonate facies, the Fe2o3t content varies from 15.42% to 20.66% and Sio2 content from 66.84 to 72.86%. The Al2o3 content is generally low ranging from 0.1% to 0.54% in the oxide facies, and 0.24% to 0.31% in the carbonate facies. Chemically, the Muro Iron-Formation is similar to the Lake Superior-type iron-formations in terms of the distribution of the major and trace elements. This taken together with similarities in lithological associations indicates its deposition in similar environments i.e. shallow intra-continental or restricted/barred marine basin. The very low Al2o3 contents indicate minor clastic dilution of the original chemical precipitates.

关键词： Muro Iron-Formation oxide Facies Carbonate Facies Geochemistry Central Nigeria

Climate Variation and Malaria Prevalence in Warri Metropolis

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Atmospheric and Climate Sciences 2013年第1期3卷 132-140页

作者： S. I. Efe C. o. ojoh Department of Geography and Regional Planning Delta State University Abraka Nigeria

This study examined the relationship between climate and prevalence of malaria in Warri metropolis. To achieve this, the study generated data from archival material from the meteorological agency and hospitals. Climate data of temperature, rainfall and humidity were collected from the Nigeria Meteorological agency, Warri and malaria in-patient and out-patient records from the two (2) central hospitals and one (1) renowned hospital each from the three (3) local Government Areas for a period of twenty (20) years (1990-2009). The data were analyzed using the Multiple Regression. From the study, the rainfall and temperature in Warri metropolis has increased over the years (1907-2009) by 122.82 mmand 1.3℃. Thus, if this warming continues there will be a risk of between 1.4℃ and an urban warming of 4.18℃, indicating climate change. There is a significant relationship between malaria and climate parameters (rainfall, temperature and humidity) which were evident at F value of 4.429 which is greater than the critical table value of 4.35, which implied that the model is significant and thus, malaria prevalence in Warri metropolis is significantly dependent on rainfall, relative humidity and temperature. It is anticipated that an increase in temperature and relative humidity resulted to a corresponding increase in the number of malaria cases, it is therefore recommended that any policy aimed at reducing the prevalence of malaria in Warri and environs must necessarily be imbued with programmes that have objectives of mosquitoes reduction through the improvement of our environment which includes the climate.

关键词： Climate Change Malaria Epidemiology Prevalence Warri Metropolis

Effect of High Temperature Treatment on Aqueous Corrosion of Low-Carbon Steel by Electrochemical Impedance Spectroscopy

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Materials Sciences and Applications 2011年第2期2卷 81-86页

作者： Samuel J. Gana Nosa o. Egiebor Ramble Ankumah 不详

The corrosion behavior of 1020C carbon steel samples that had been subjected to oxidizing heat treatment at 550°C and 675°C were studied in sodium chloride electrolytes using a 3-electrode electrochemical impedance spectroscopy. Experimental data were used to evaluate the corrosion behavior of the samples while optical microscopy was employed to investigate the surface characteristics of the samples before and after aqueous corrosion. The results showed that while the sample treated at 550°C revealed an increasing corrosion rate with time, the sample treated at 675°C indicated a higher initial corrosion rate, but the rate declined gradually over the 4-day experimental period. optical microscopy revealed significant formation of surface corrosion products on both heat treated samples, but the complex plane diagrams indicated significant capacitive behavior for the heat treated samples relative to the untreated samples.

关键词： Impedance Carbon Steel Corrosion Nyquist Diagrams Photomicrographs

Perception and Information Seeking Behaviour of Rural Households towards Health Promoting Practices in Maigana District of Kaduna State, Nigeria

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open Journal of Medical Psychology 2017年第4期6卷 233-242页

作者： C. C. Ezeh o. H. Ezeh College of Agriculture Ahmadu Bello University Zaria Nigeria Department of Community Medicine Ahmadu Bello University Zaria Nigeria

Information is valuable, increases understanding and reduces uncertainty. Limited knowledge and access to health promoting and disease prevention programmes are more pronounced in rural than urban areas of Nigeria. Furthermore, the paucity of healthcare services in these rural communities also contributes to the prevalence of health challenges in the rural sector. This study investigated the perception and information seeking behavior of rural households in Maigana District of Kaduna State, Nigeria towards health promoting practices. A random sample of 152 respondents selected from five of eleven wards in the district was interviewed using a pre-tested structured questionnaire. The results, based on a 4-point Likert type scale and benchmark of 2.5 showed a very poor perception of health promoting practices among the respondents. Also, the information needs of the respondents were shown to be enormous. Three of the six socio-demographic variables regressed were found to significantly influence the information seeking behavior of the respondents regarding health promoting practices. Constraints limiting the embracement of health promoting practices were identified and measures aimed at promoting healthier living standards in rural communities were recommended. The study concludes that vast knowledge gaps do exist coupled with the poor perception of HPPs by the respondents.

关键词： Perception Information Health Promoting Rural Households

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