PROFITABILITY ANALYSIS OF OFADA RICE PRODUCTION IN OGUN STATE, NIGERIA

The paper undertook an economic analysis of Ofada rice production in five prominent rice growing areas of Ogun State.  A two stage purposive sampling technique was employed to select a total of 120 rice farmers from five local government areas which are major areas known for Ofada rice production in the state. Primary data were collected for the study through structured questionnaire and Focus Group Discussion (FGD) among rice farmers groups in the study area. Analytical tools adopted for the study included frequency, percentages, gross margin analysis and profitability ratios. Results of the analysis showed that majority of Ofada rice producers in the study area are male (73.33%). In terms of age, more than half of the respondents fell within the age range of 41 -50 years (63.33%) these farmers were young and within their active productive lives. Results of the distribution of respondents by annual income in the study area revealed that majority of the respondents (60.83%) obtained an income of between ₦201,000 and ₦400,000.00 per hectare.  However, 22.50% of the respondents obtained an income of less than ₦200,000.00 per hectare. The gross ratio, operating ratio, return per naira invested and profitability index were calculated to be 0.95, 0.80, 1.90 and 1.80 respectively. The gross margin of rice production per hectare was also estimated to be ₦222,020.00. All these indicate overall profitability of the enterprise. However, an average low yield of 2.5 tonnes per hectare was recorded due to constraints encountered during production. Some of the identified constraints in the study area are lack of capital (25.83%), lack of tractor for land clearing (10.83%), lack of good farm roads (16.67%), and inadequate processing and storage facilities (11.67%). It is then recommended that access to adequate capital, mechanical equipment and other incentives through farmers’ cooperatives and government aid for construction of farm roads could help increase rice production in the area and this will in turn help Nigeria to achieve a much desired self-sufficiency in rice production.     &nbsp

THE PERIODICITY OF BUILDING HONEY COMBS BY HONEY BEES AND PEST INFESTATION IN TWO APIARIES IN OGUN STATE, SOUTH WESTERN NIGERIA

The study examined the periodicity of comb building by Honey bee, Apis mellifera in some hivesin Ogun State and pest of the honey bee in hives for twenty weeks. Four Kenya top bars hives wereeach placed in two apiaries located in University of Agriculture, Abeokuta (UNAAB), Ogun State, Nigeriaand Olupakun village in Abeokuta North Local Government Area, Ogun State, Nigeria. Each of the22 top bars and the flight entrances were smeared with honey as bait to attract bees to the hive. Datawere collected weekly from two colonized hives in each apiary on: number of honey combs built, sizeof newly built honey combs along and across the bars and pest infestation. The results indicated thatthe bees initiated comb building as early as first week after colonization. In the first week, two combsbuilt in hives at UNAAB had mean size of 8.61cm2 and one and half combs built in hives at Olupakunmeasured 1.65 cm2. As at the 20th week, seven and half combs measuring 662.71 cm2 and eightcombs measuring 352.28cm2 were built at UNAAB and Olupakun respectively. Although, higher numbersof combs were built at Olupakun; they were of relatively smaller sizes than combs built in hives atUNAAB. The pests encountered in the hives were greater wax moth (Galleria mellonella), grass hopper(Zonocerus variegatus), termites (Macrotermites nigeriense), Cockroach (Periplanata americana),snakes, Lizard (Agama agama) and Praying mantis (Stanomantis spp.

Evaluation of Physicochemical Properties of Soil under Gum Arabic Tree (Acacia senegal L.) Wild Plantation in Sahel Zone of Jigawa State, Nigeria

Acacia senegal (L), a nitrogen fixing tree and a drought resistant species with potentials to improve infertile soils was planted in Sahel zone of Jigawa State, Nigeria for the production of gum arabic. However, information on the soil physico-chemical properties under plantation in Nigeria is scanty, hence the objective of this paper was to evaluate the physicochemical properties of soil under gum arabic tree (Acacia senegal L) wild plantation in Sahel zone of Jigawa State, Nigeria. Soil samples were collected from four 30 x 30m plots in the plantation and another plot in open land (control). Three replicate soil samples were taken from 0-15 cm, 15-30 cm and 30-60 cm soil depths, analysed for micro and macronutrients using standard methods. Soil texture of the plantation is loamy sand but with slight textural differentiation under the open land. Mean soil bulk density ranged from 1.6 g/cm3 in the plantation to 1.8g/cm3 in the open woodland. The high values of soil bulk density might be ascribed to loss of organic matter as a result of soil erosion and animal grazing which are common occurrences. Results obtained indicated that the ECEC decreased as the soil depth increased and is low in values while the CEC of soils range from 5.57 to 5.97. The physicochemical properties of soils under the plantation were significantly different at P < 0.05 compared with the control an indication that Acacia senegal can gradually improves soil quality and productivity especially in Sahel zone of the northern part of Nigeria

Predictors of differences in health services utilization for children in Nigerian communities

Health service utilization is an important component of child health promotion. Evidence shows that two-thirds of child deaths in low and middle income countries could be prevented if current interventions were adequately utilized. Aim of this study was to identify determinants of variation in health services utilization for children in communities in Nigeria. Multivariable negative binomial regression model attempting to explain observed variability in health services usage in Nigerian communities was applied to the 2013 Nigeria Demographic and Health Survey data. We included the index of maternal deprivation, gender of child, community environmental factor index, and maternal health seeking behavior, multiple childhood deprivation index and ethnicity diversity index as the independent variables. The outcome variable was under-fives’ hospital attendance rates for acute illness. Of the 7, 577 children from 896 communities in Nigeria that were sick 1, 936 (25.6%) were taken to the health care facilities for treatment. The final model revealed that both multiple childhood deprivation (incidence rate ratio [IRR] = 1.23, 95% confidence interval [CI] 1.12 to 1.35) and children living in communities with a high ethnic diversity were associated with higher rate of health service use. Maternal health seeking behaviour was associated with a significantly lower rate of health care service use. There are significant variations in health services utilization for sick children across Nigeria communities which appear to be more strongly determined by childhood deprivation factors and maternal health seeking behaviour than by health system functions

Exploring variations in childhood stunting in Nigeria using league table, control chart and spatial analysis

Background: Stunting, linear growth retardation is the best measure of child health inequalities as it captures multiple dimensions of children’s health, development and environment where they live. The developmental priorities and socially acceptable health norms and practices in various regions and states within Nigeria remains disaggregated and with this, comes the challenge of being able to ascertain which of the regions and states identifies with either high or low childhood stunting to further investigate the risk factors and make recommendations for action oriented policy decisions. Methods: We used data from the birth histories included in the 2008 Nigeria Demographic and Health Survey (DHS) to estimate childhood stunting. Stunting was defined as height for age below minus two standard deviations from the median height for age of the standard World Health Organization reference population. We plotted control charts of the proportion of childhood stunting for the 37 states (including federal capital, Abuja) in Nigeria. The Local Indicators of Spatial Association (LISA) were used as a measure of the overall clustering and is assessed by a test of a null hypothesis. Results: Childhood stunting is high in Nigeria with an average of about 39%. The percentage of children with stunting ranged from 11.5% in Anambra state to as high as 60% in Kebbi State. Ranking of states with respect to childhood stunting is as follows: Anambra and Lagos states had the least numbers with 11.5% and 16.8% respectively while Yobe, Zamfara, Katsina, Plateau and Kebbi had the highest (with more than 50% of their underfives having stunted growth). Conclusions: Childhood stunting is high in Nigeria and varied significantly across the states. The northern states have a higher proportion than the southern states. There is an urgent need for studies to explore factors that may be responsible for these special cause variations in childhood stunting in Nigeria

Occurrence of Similar Periods in Geomagnetic Field Variations and Solar Activity

The periodicities associated with some geomagnetic field parameters under quiet and disturbed solar conditions have been examined using a set of data spanning through five years obtained courtesy of INTERMAGNET network. Hourly values of the Horizontal component of the geomagnetic field simultaneously obtained at seven INTERMAGNET stations were engaged in the study. The stations were well distributed across the latitudes, viz: Bangui, 4.4°N; Kourou, 5.1°N; Alibag, 18.6°N; San Juan18.1°N; Crozet, 46.4°S; Barrow, 71.3°N; Scott  Base, 77.9°S). Solar quiet daily variation Sq, Superposed Magnetic field SPMF and Solar disturbance daily variation SD in the horizontal magnetic field component were evaluated and studied for their spectral characteristics. The spectral analysis revealed the periods of 6 hours, 12 hours, 24 hours, 3 months, 6 months, 12 months and 16 months in the geomagnetic field variations. The observed periodicities were explained in terms of associated solar terrestrial processes. This clearly shows the influence of an extra terrestrial source (the Sun) on terrestrial processes. Sun is the undisputable driver of space weathe

Prevalence of sero-markers and non-invasive assessment of liver cirrhosis in patients with hepatitis B virus infection in Freetown, Sierra Leone: a cross-sectional study

BACKGROUND: Hepatitis B virus (HBV) is a major global health problem. Although sub-Saharan Africa has a high proportion of the global burden of HBV, the epidemiology and clinical features of HBV in this region are poorly characterized, and access to diagnostic and treatment services remain limited. METHODS: We conducted a retrospective study of HBV-infected children and adults of all age groups who were evaluated at public and private health facilities in Freetown, Sierra Leone between January 2017 and January 2019. We assessed their clinical presentation, HBV sero-markers, stages of liver disease, prevalence of cirrhosis by non-invasive tools, and the proportion of treatment eligible patients using the criteria recommended by the World Health Organization's 2015 treatment guidelines for HBV. Logistic regression was used to identify predictors of liver cirrhosis. RESULTS: 163 HBV patients included in the study, with mean age 32.6 years and 65.0% (106) being males. Most (84.0%) were asymptomatic at presentation. The majority (69.9%) were classified as having HBeAg-negative chronic infection (or inactive HBsAg carrier phase), 24.5% were in the HBeAg-negative immune active phase, 3.1% had HBeAg positive hepatitis, and 2.5% were HBsAg negative. The median Aspartate aminotransferase to Platelet Ratio (APRI) and Fibrosis-4 (FIB-4) scores were 0.37 and 0.80, respectively. The prevalence of cirrhosis was 7.6% and 6.2%, estimated by the APRI and FIB-4 scores, respectively. About 20.0% of patients were eligible for treatment with antiviral agents. Based on APRI scores, the presence of any symptom [adjusted odds ratio (aOR) 20.0, 95% confidence interval (CI) (4.1-85.9); p < 0.001], elevated direct bilirubin [aOR 12.1, 95% CI (1.9-63.0); p = 0.003], and elevated total bilirubin [aOR 16.1, 95% CI (3.2-80.8); p = 0.001] were independent predictors of cirrhosis. CONCLUSION: Although most patients with HBV infection were asymptomatic, the prevalence of liver cirrhosis and proportion of patients requiring antiviral treatment were substantial. This small study from a hyperendemic setting in Sierra Leone suggests that routine population-based screening may increase early detection and linkage of HBV patients to care before development of complications. Larger studies are needed to confirm our findings

Contribution à l'analyse des paliers fluides et des joints d'étanchéité utilisés dans lesturbopompes spatiales

La conception des turbomachines à haute densité énergétique nécessite de plus en plus la maîtrise d'un plus grand nombre de paramètres fonctionnels. La moindre défaillance d'un composant conduit quasi immédiatement la machine à la rupture. C'est en particulier le cas pour le comportement des composants à films minces.L'appellation "film mince" correspond à tout espace de très faible épaisseur situé entre le rotor et le stator de la turbomachine. Leur but est soit de limiter les fuites de manière à optimiser les performances intrinsèques de la machine, soit alors à supporter et stabiliser le rotor. Ces derniers cas sont plus appelés communément "joints lisses ou annulaires" et "paliers fluides".Lorsqu'un fluide circule dans un espace de très faible épaisseur, typiquement quelques centièmes de millimètres sur une distance très longue, son champ de vitesses, donc de pression, dépend fortement des phénomènes visqueux aux parois dont l'une est mise en rotation et l'autre est immobile. Les efforts fluides sur ces parois peuvent être alors importants et doivent être pris en compte dans le dimensionnement de la machine.La connaissance précise de ces écoulements très complexes est indispensable pour déterminer les efforts statiques et dynamiques appliqués au rotor de manière à pouvoir dimensionner un fonctionnement calme.The design of high performance aerospace turbo pumps requires more control of an increasing number of functional parameters. Any component failure led almost immediately to a machine failure. This is particularly the case for the behavior of thin film lubricated components.The term "thin film" means any thin space between the rotor and the stator of the engine. Their goal is either to limit leakage to maximize the machine intrinsic performance, or to support and stabilize the rotor. These cases are more commonly called "smooth or annular seals" and "fluid film bearings".When a fluid flows in a space of very small thickness, typically a few hundredths of a millimeter, the velocity field, hence the pressure, are highly dependent on the walls viscous forces. Fluid forces on the walls (which one is rotated and the other is stationary) can then be important and should be taken into account in the design of the machine.The precise knowledge of these complex flows is essential to determine the static and dynamic forces applied to the rotor to ensure a quite functioning of the turbo pump.POITIERS-SCD-Bib. électronique (861949901) / SudocSudocFranceF

Effect of Using the Same vs Different Order for Second Readings of Screening Mammograms on Rates of Breast Cancer Detection A Randomized Clinical Trial

Importance Interpreting screening mammograms is a difficult repetitive task that can result in missed cancers and false-positive recalls. In the United Kingdom, 2 film readers independently evaluate each mammogram to search for signs of cancer and examine digital mammograms in batches. However, a vigilance decrement (reduced detection rate with time on task) has been observed in similar settings. Objective To determine the effect of changing the order for the second film reader of batches of screening mammograms on rates of breast cancer detection. Design, Setting, and Participants A multicenter, double-blind, cluster randomized clinical trial conducted at 46 specialized breast screening centers from the National Health Service Breast Screening Program in England for 1 year (all between December 20, 2012, and November 3, 2014). Three hundred sixty readers participated (mean, 7.8 readers per center)—186 radiologists, 143 radiography advanced practitioners, and 31 breast clinicians, all fully qualified to report mammograms in the NHS breast screening program. Interventions The 2 readers examined each batch of digital mammograms in the same order in the control group and in the opposite order to one another in the intervention group. Main Outcomes and Measures The primary outcome was cancer detection rate; secondary outcomes were rates of recall and disagreements between readers. Results Among 1 194 147 women (mean age, 59.3; SD, 7.49) who had screening mammograms (596 642 in the intervention group; 597 505 in the control group), the images were interpreted in 37 688 batches (median batch size, 35; interquartile range [IQR]; 16-46), with each reader interpreting a median of 176 batches (IQR, 96-278). After completion of all subsequent diagnostic tests, a total of 10 484 cases (0.88%) of breast cancer were detected. There was no significant difference in cancer detection rate with 5272 cancers (0.88%) detected in the intervention group vs 5212 cancers (0.87%) detected in the control group (difference, 0.01% points; 95% CI, −0.02% to 0.04% points; recall rate, 24 681 [4.14%] vs 24 894 [4.17%]; difference, −0.03% points; 95% CI, −0.10% to 0.04% points; or rate of reader disagreements, 20 471 [3.43%] vs 20 793 [3.48%]; difference, −0.05% points; 95% CI, −0.11% to 0.02% points). Conclusions and Relevance Interpretation of batches of mammograms by qualified screening mammography readers using a different order vs the same order for the second reading resulted in no significant difference in rates of detection of breast cancer. Trial Registration isrctn.org Identifier: ISRCTN4660337

Diagnosis and treatment outcomes of adult tuberculosis in an urban setting with high HIV prevalence in Sierra Leone: A retrospective study

OBJECTIVE: To assess the diagnosis, treatment outcomes, and predictors of mortality in adult tuberculosis (TB) patients in an urban setting with a high HIV prevalence. METHODS: A retrospective study was conducted of adult TB patients aged >/=15 years who were treated at Connaught Hospital in Freetown, Sierra Leone from January through December 2017. Multivariate logistic regression was used to identify predictors of mortality. RESULTS: Of 1127 TB cases notified in 2017, 1105 (98%) were tested for HIV, yielding a TB/HIV co-infection rate of 32.0%. Only HIV-tested cases (n=1105) were included in the final analysis. The majority were male (69.3%), aged 25-34 years (29.2%), and had pulmonary TB (96.3%). Treatment outcomes were as follows: 29.0% cured, 29.0% completed, 0.5% treatment failure, 24.2% lost to follow-up, 12.8% transferred/not evaluated, and 4.5% died. The majority of deaths (80.0%, 40/50) occurred within 2 months of TB treatment initiation. Age 65 years or older (adjusted odds ratio 3.48, 95% confidence interval 1.15-10.56; p=0.027) and HIV-positive status (adjusted odds ratio 3.50, 95% confidence interval 1.72-7.12; p=0.001) were independent predictors of mortality. CONCLUSIONS: Suboptimal TB treatment outcomes were observed in Sierra Leone in 2017. More local and international action is warranted to help achieve the 2035 global TB elimination targets