SLUG FLOW IN LARGE DIAMETER PIPELINE-RISER SYSTEMS: PREDICTION AND MITIGATION

 Slug flow could pose serious threat to oil and gas production facility. The objective of the study was to gain better insight into the behaviour of slug flow in large pipe diameter pipeline-riser system. The influence of geometry configuration on the slug characteristics was also investigated. The understanding of these are very important in the development of effective slug control strategy. Numerical simulations were carried out on a 3.7 km long horizontal pipeline leading to a 0.13 km vertical riser using an industrial software package. The pipeline and riser are both of 17” internal diameter. Slug envelopes were developed for the pipeline-riser system and its constituents’ pipes. A total number of 572 data points were investigated, covering superficial velocities ranging from 0.01 to 44.28 m/s for gas and 0.02 and 8.25 m/s for liquid. The results showed three distinct slug flow regions: region due to horizontal pipeline slugging (H) where slugs formed in the horizontal pipeline are transported through the riser pipe nearly unchanged, region due to both horizontal and vertical pipes slug contributions (I) where the slugs formed in the horizontal pipe keeps growing even through the riser pipe and region due to vertical pipe slugging (V) where slug formation was predominantly due to the vertical pipe. The observed phenomenon is in consonance qualitatively with the experimental studies published in another paper, but quantitatively different and this may be due to diameter effect.  The results also showed that choking can indeed be used to mitigate slug flow in all the regions but at considerable cost. The valve must be choked down at various degrees depending on the regions (flow conditions). There is therefore, the need to seek a better way of stabilizing slug flow bearing in mind the distinct behaviours of the identified regions

International Financial Reporting Standards (IFRS) Transplanting and Convergence in Nigeria: Consequences and Prospects

Accountancy profession across the world has been witnessing revolution for sometimes now, especially after thecase of Enron and Word com and the challenges to Auditing as profession. The profession has another breakingpoint in Nigeria in 2012 just like many other countries, IFRS transplanting and convergence, a standard that hasnot yet been adopted in the United States of America. The specific of objective of the paper is to evaluate theconsequences of the convergence in Nigeria with a view to pointing out what per adventure have not been doneright in the transplanting, suggest what should be done to enable the country derive the full benefits of thechange in the accounting regulation. The data are collected through primary data apparatus and cross sectionalsecondary data from the annual reports of the selected case studies. The methodology adopted is student-tdistribution. We also deployed descriptive statistics. The results from the descriptive statistics portend mixreactions. Most of the variables selected have both positive and negative signs; when it is positive, it means thatthe amount reported in the financial statements under GAAP is higher than that of IFRS and vice versa. Thestudent-t portends that at 5% confidence interval, there is significant difference between the figures reportedunder IFRS and GAAP, consequently the convergence of IFRS in Nigeria has offered invaluable benefits andsignificant effects. We however recommend that government should immediately review all the relevant sectionsin the local extant laws and review syllabus of accounting in tertiary institutions and secondary schools in orderto have the unity of purpose and derive optimum benefits in the convergence of IFRS in Nigeria.Keywords: Revolution, IFRS Transplanting, Convergence, Cross Sectional, Secondary Data, GAAP and MixReaction

Energy Poverty and the Security Challenges in Northern Nigeria-Incidence and the Potential for Renewables

A Multidimensional Energy Poverty Index (MEPI) has been used to study the incidence of energy poverty in Nigeria. Secondary data from the United States Agency for International Development was collated from over 44,000 households, from which calculated MEPI for the various regions of Nigeria show that the southwest had the least incidence of energy poverty, while the northeast region had the highest energy poverty. Cogent connections have been made between recent security challenges in the northeast with energy poverty. Reports taken from studies and the mass media show that vast majority of attacks occur in the geopolitical region. Thus, renewables such as solar and wind energies abundant in northeast Nigeria have been identified as potential solutions to ending energy poverty and hence a strategic pathway to arresting the current security challenges

Strategic Slug Flow Attenuation in Pipeline-Riser Systems

Oil and gas activities across the globe now take place deep offshore. To operate in this harsh environment, there are numerous challenges. These can be in the form of high cost of production, space constraints, operational and technological demands. The co-transportation of oil and gas in same pipeline is one of the operational and technological approaches adopted in the industry to meet the transportation of produced crude. This approach comes with its attendant flow assurance difficulties. Slugging is one of such problems which can constitute operational hitches resulting in production reduction and sometimes eventual plant shutdown. Existing attenuation techniques are limited in various ways. Therefore, seeking a reliable solution to this problem is highly desired. In this study, an experimental study of multiple techniques for slug attenuation was attempted. A passive device-the intermittent slug absorber, strategically combined with topside choking as well as topside separator were investigated. The theoretical analysis showed that slug attenuating devices can be combined in parallel to reduce the resistance posed on flow, leading to increased flow. The experimental results showed that a combination of the methods proves to be more effective compared to individual techniques. A significant reduction in riser- base pressure of up to 39% was achieved. This is advantageous and translates to an increase in oil recovery. Thus, the proposed strategy helps to achieve system stability and improved production at a lower cost

Chest X-ray findings in HIV- infected Highly Active Antiretroviral Treatment (HAART) - naïve patients

Introduction: Patients with human immunodeficiency virus (HIV) infection frequently present with a wide spectrum of pulmonary and cardiaccomplications from the virus, opportunistic infections and neoplasms that may be associated with a high mortality rate. Diseases of the respiratorytract account for about half of deaths from AIDS, while cardiac diseases account for more than a quarter of deaths from AIDS. This study aimed atdetermining the prevalence of pulmonary and cardiac diseases using a chest radiograph in HAART-naïve HIV-infected patients. Methods: Thisstudy was conducted at Lagos State University Teaching Hospital (LASUTH) HIV clinic between September 2010 and August 2011 amongst allregistered HAART-naïve HIV/AIDS patients. Patients had posterior-anterior chest radiographs done in full inspiration. Participants were asked andaided to fill the structured questionnaires to obtain demographic data. Results: Out of a total of one hundred and two recruited for the study, 54 (52.94%) had a normal chest radiograph, while 48 (47.06%) had abnormal chest radiograph .The abnormal findings included, 27.45% who hadbronchopneumonia, 6.86% cardiomegaly, 5.88% pulmonary tuberculosis, 5.88% radiological features of congestive cardiac failure, and 0.98%bronchitis. Conclusion: It appears that more than half of HAART–naïve HIV-infected patients have normal chest radiographs. Bronchopneumonia(27.5%) is the commonest pulmonary abnormality associated with HIV infection, while the prevalence of pulmonary tuberculosis is 5.88%.Key words: Chest X-ray, HIV-infected, HAART-naïve

PREVALENCE AND MANAGEMENT OF FALCIPARIUM MALARIA AMONG INFANTS AND CHILDREN IN OTA, OGUN STATE, SOUTHWESTERN NIGERIA

Studies were carried out to determine the prevalence of malaria parasite infection among infants and children (0-12yrs) in Ota, Southwestern Nigeria between April and December 2008. The two hospitals used were Ota General Hospital and Covenant University Health Centre, Canaanland, Ota. Thick and thin films were made and stained using standard parasitological procedures. Structured Questionnaires were distributed to ascertain the age, sex, drugs or insecticides used and state of health of the subjects before recruiting them into the study. Overall, 215 (80.5%) of the 267 children investigated were found to have malaria infection. Age group (0-5 years) had the highest frequency rate of 84.7% with mean parasite density of 900 and the difference between the age groups was statistically significant (p<0.05). Children of illiterates from suburb villages had the highest mean parasite density of 850 with 78.1% prevalence rate. 20% of the children were given local herbs and 22% used orthodox medicine as prophylaxis. Only 18% used insecticide treated mosquito nets while 24% of the parents spray insecticides to prevent mosquito bites. There is therefore need for more awareness on effective use of drugs and Insecticide Treated bed nets in malaria hyperendemic regions

A descriptive survey of types, spread and characteristics of substance abuse treatment centers in Nigeria

<p>Abstract</p> <p>Background</p> <p>Nigeria, the most populous country in Africa and the 8th most populous in the world with a population of over 154 million, does not have current data on substance abuse treatment demand and treatment facilities; however, the country has the highest one-year prevalence rate of Cannabis use (14.3%) in Africa and ranks third in Africa with respect to the one-year prevalence rate of cocaine (0.7%) and Opioids (0.7%) use. This study aimed to determine the types, spread and characteristics of the substance abuse treatment centers in Nigeria.</p> <p>Methods</p> <p>The study was a cross sectional survey of substance abuse treatment centers in Nigeria. Thirty-one units were invited and participated in filling an online questionnaire, adapted from the European <it>Treatment Unit/Program Form (June 1997 version)</it>.</p> <p>Results</p> <p>All the units completed the online questionnaire. A large proportion (48%) was located in the South-West geopolitical zone of the country. Most (58%) were run by Non-Governmental Organizations. Half of them performed internal or external evaluation of treatment process or outcome. There were a total of 1043 for all categories of paid and volunteer staff, with an average of 33 staff per unit. Most of the funding came from charitable donations (30%). No unit provided drug substitution/maintenance therapy. The units had a total residential capacity of 566 beds. New client admissions in the past one year totalled 765 (mean = 48, median = 26.5, min = 0, max = 147) and 2478 clients received services in the non-residential units in the past year. No unit provided syringe exchange services.</p> <p>Conclusions</p> <p>The study revealed a dearth of substance abuse treatment units (and of funds for the available ones) in a country with a large population size and one of the highest prevalence rates of substance abuse in Africa. The available units were not networked and lacked a directory or an evaluation framework. To provide an environment for effective monitoring, funding and continuous quality improvement, the units need to be organized into a sustainable network.</p

Evaluating the Association Between Depressive Symptoms and Glycemic Control Among Residents of Rural Appalachia

Introduction: Type 2 diabetes mellitus (T2DM) is associated with a range of co-morbid physical and psychological conditions, including depression. Yet there is a dearth of evidence regarding the prevalence of depression among those in Appalachia living with T2DM; this gap persists despite the higher regional prevalence of T2DM and challenging social determinants of health. Purpose: This study aimed to provide greater detail about the relationships between T2DM and depressive symptoms in adults living in Appalachia Kentucky. Methods: The present study was a cross-sectional analysis of baseline data derived from an ongoing study of Appalachia Kentucky adults living with T2DM. Outcome data included demographics, Center for Epidemiologic Studies Depression Scale, point-of-care HbA1c, and the Summary of Diabetes Self-Care Activities. Bivariate analysis was conducted using Pearson’s correlation to determine the statistically significant relationships between variables which were then included in a multiple regression model. Results: The sample (N=365), consisted primarily of women (n=230, 64.6%) of mean age 64 years (±10.6); almost all (98%) were non-Hispanic White (n=349), and most were married (n=208, 59.1%). The majority (47.2%) reported having two comorbid conditions (n=161), including T2DM, and the mean HbA1c was 7.7% (1.7). Nearly 90% were nonsmokers (n=319). Depressive symptoms were reported in 25% (n=90) of participants. A higher number of comorbid conditions, increased age, Medicaid insurance, tobacco use, lower financial status, female sex, and disability compared to fully employed status all were correlated with a higher rate of depressive symptoms (r ≤ 0.2). The regression indicated that depressive symptoms were associated with age (β = –0.010, p = 0.001); full-time employment status compared to those who are disabled (β = –.0209, p = 0.18); men compared to women (β = –0.122, p = 0.042), and those who smoke compared to nonsmokers (β = 0.175, p = 0.038). Implications: Depressive symptoms were correlated with T2DM among this sample of Appalachian residents with poorly controlled T2DM, especially among women. Given the vast number of social determinants (e.g., poverty, food insecurity, and rurality) affecting this population, healthcare providers must assess for depression and consider its negative influence on the patient’s ability to achieve glycemic control

Potential of genomics for the improvement of underutilized legumes in sub-Saharan Africa

Open Access Journal; Published online: 03 Jan 2021Underutilized, or orphan legumes, are widely distributed across farming landscapes in sub-Saharan Africa (SSA) but often have low yields and do not fulfill their potential due to very limited research, breeding, development, marketing, and awareness of their benefits. These advantages include nutritional quality and climate resilience. In this review, we focus on Bambara groundnut, African yam bean, and Kersting's groundnut. Knowledge of the challenges and rewards of exploiting them will provide opportunities for concerted approaches to their revival and contribution to future global food systems, especially in the context of climate change. This review identifies the institutional and noninstitutional challenges, the constraints, the prospects, and the rewards that can be derived from exploiting orphan legumes in SSA. The genetic resources center (GRC) of the International Institute of Tropical Agriculture (IITA) conserves a diverse collection of about 2500 accessions of these crops with the majority from Africa. In this review, we focus on the ex situ conservation of the genetic resources of these indigenous African legume crops, their characterization and evaluation, prospects for the development of improved cultivars, and the role they could play, particularly with respect to nutrition and adaptation to climate change. We emphasize progress made in recent years concerning the assembly of information required for application of genomics tools to these crops and how this will underpin the development of improved varieties

Pre-and-post-operative aversion among men whose partners had caesarean delivery in a patriarchal setting.

Objectives: The study evaluated pre and post-operative perception and aversion to caesarean delivery (CD) among men whose partners underwent the procedure.Design: A multicentre cross-sectional study.Setting: Two tertiary and two secondary health facilities.Participants: Men whose partners underwent CD at the study sites.Methods: Participants were recruited by purposive sampling, data collection was through interaction via an interviewer-administered questionnaire first immediately the decision for CD was made and thereafter on the third postoperative day. Men whose partners had vaginal delivery were excluded from the study and data management was with SPSS version 21.0 while p&lt;0.05 was significant.Results: Awareness about CD was 84.0% mainly through the healthcare workers (42.1%) and the female partner (34.1%); 88.0% of participants recommended CD for medically-indicated reasons. The greatest influence on consent was the male partner (48.8%). The major pre-operative concerns were limitation of family size (34.7%) and fear of repeat CD (34.0%). Pre-operative perceptions of CD included being expensive (60.7%), fear of the procedure (48.0%), fear of complications (45.3%) and longer hospital stay (44.0%). Aversion to CD was 30.0% pre and 5.3% post-operation; predictors of aversion were history of previous surgery among male or female partner and awareness about CD. However, there were reductions in negative perception and aversion post-operation.Conclusion: The high negative perception and aversion to CD among male partners were reduced post-operation. Healthcare workers should address the concerns and negative perceptions about CD and prioritize patient-friendly experiences during surgical operations