Angular Spectral Analysis and Lowpass Filtering of Aeromagnetic Data Over Western Parts of Bornu Basin of Nigeria

Total-field aeromagnetic data over the western half of the Bornu basin and its surrounding areas were analyzed using angular spectral analysis, upward continuation and lowpass filtering techniques. Results revealed several angular spectral peaks at various angular orientations. The angular orientations correlated with the trends of the deep-seated NNW-SSE, NW-SE, NNE-SSW and NE-SW regional lineaments inferred from the upward continuation and lowpass filtering techniques. Superposition of the inferred regional lineaments on the surface geology suggests that the inferred lineaments exerted structural control on the magmatism, sedimentation pattern and the flow pattern of the Gongola river in the study area.Keywords: Bornu basin, upward continuation, lowpass filtering, angular spectral analysis, lineament

Performance Analysis of a Constructed Dual Axis Solar Tracker

A major drawback to photovoltaic system is the fact that solar cells become useless at night. In the quest to overcome this, use of batteries, converters, backup generator and addition of extra panels at higher cost to PV grid have been proposed but the performance of the system with integration of the said components is still very much dependent how much solar energy directly reach the solar cell surface. A feasible approach to achieve this is solar tracking. In this study, performance evaluation of a constructed dual axis solar tracker integrated PV system was carried out for five weeks and compared with that of a flat fixed PV system installed at Ogbomoso, Nigeria (8° 08’ N, 4° 16’ E). It was discovered that the power and performance of dual axis system obtained averagely was 62.91 W compared to that of flat fixed PV System which was 47.88 W thereby improving the power output by 31.4%. Keywords: Solar Energy, Dual Axis System, Photovoltaic, Performance, Tropical region, Nigeria. DOI: 10.7176/APTA/75-0

Electro-Optical Characterization of Stannous Oxide Based Conductive Glass Fabricated Locally with Stannous Chloride Dihydrate Precursor

Most commercially available conductive oxides such as indium doped tin oxide (ITO) and fluorine doped tin oxide (FTO) are expensive. This has made local production of alternative oxides necessary. This work demonstrates local production of transparent conducting stannous oxide (SnO) film via thermal decomposition of stannous chloride dihydrate (SnCl2·2H2O). The films were then characterized optically and electrically using UV/VIS spectrophotometer and four point probe, respectively. The thickness of the film increased linearly with precursor mass. While the sheet resistance and optical transmittance decreased, the optical absorbance increased with increased thickness. Average optical transmittance ranged between 85% and 94% and the sheet resistance lies between 62.89 Ω/sq and 84.57 Ω/sq. With these characteristics, the deposited film will be useful for optoelectronic applications

Performance and cost-benefits of weaner rabbits fed graded levels of Moringa oleifera leaf meal

Moringa has been acclaimed to be beneficial especially in livestock production. Its leaves and green fresh pods are said to be rich in carotene and ascorbic acid with a good profile of amino acids while its twigs are reported to be very palatable to ruminants and have appreciable crude protein levels. However, Moringa oleifera leaf meal (MOLM) has been observed to contain higher pepsin and total soluble protein than other parts of the plant which makes it more suitable to monogastric animals. MOLM has been widely used in poultry production but with limited use in rabbits� diets; hence this study was conducted to determine the performance of weaner rabbits fed graded levels of MOLM. A total of 48 unsexed weaner rabbits of mean initial weight of 744.56�29.25 g were assigned to 4 experimental diets, namely T1, T2, T3 and T4 containing 0%, 15%, 30% and 45% MOLM, respectively, having 3 replicates and 4 animals per replicate. The results showed that the dry matter intake of T1-T4 ranged 53.17 - 55.31g/day. Though not significant, highest crude protein digestibility coefficient was recorded for experimental animals on diet T4 (71.36%) followed by diets T1 (69.67%), T2 (69.17%), T3 (68.25%), respectively. The keel length for T1, T2, T3, and T4 rabbits were 225.39, 201.64, 246.66 and 217.26cm, respectively Rabbits fed 30% MOLM were found to be most profitable numerically (N1320.10) while the least profit was obtained with 0% MOLM with N1305.40. Hence, it can be concluded that Moringa oleifera leaf meal (MOLM) can replace soya bean meal up to 45% in the nutrition of weaner rabbits

Economic Value of Mangrove Forest in Pannikiang Island, Barru District, South Sulawesi, Indonesia

Abstract Mangrove forest area is a very important area in Pannikiang. Mangrove forests in this area are used by the community as a livelihood. This study wants to learn about the economic valuation of mangrove forests on Pannikiang Island, Makassar. A total of 60 respondents were interviewed in depth. Benefit value, calculated using the value of Direct Use, Indirect Use Value, Option Value, Existence Value, and Total Economic Value. The total economic value of mangrove forests on the Pannikiang Island Rp. 16,155,904,158/year or Rp. 183,007,523,300/ha/year. The patterns and manner of utilization, resource mangrove ecosystem is using gear nets, traps, hooks iron in catching shrimp and crab, develop nursery mangrove system with scraped or directly from the fruit, using gear nets, traps, using an iron hook and set traps crab (rakkang) in catch crabs, catch the bat, found in the mangrove forest, using the net, made bridge length, and the middle of the mangrove forest tower area so that the end could be resting and go up to the tower to see the entire expanse of the forest mangrove Pannikiang Island, wanamina cultivation, which combines farming of fish/shrimp with mangroves

Impacts of biomedical hashtag-based Twitter campaign: #DHPSP utilization for promotion of open innovation in digital health, patient safety, and personalized medicine

The open innovation hub Digital Health and Patient Safety Platform (DHPSP) was recently established with the purpose to invigorate collaborative scientific research and the development of new digital products and personalized solutions aiming to improve human health and patient safety. In this study, we evaluated the effectiveness of a Twitter-based campaign centered on using the hashtag #DHPSP to promote the visibility of the DHPSP initiative. Thus, tweets containing #DHPSP were monitored for five weeks for the period 20.10.2020–24.11.2020 and were analyzed with Symplur Signals (social media analytics tool). In the study period, a total of 11,005 tweets containing #DHPSP were posted by 3020 Twitter users, generating 151,984,378 impressions. Analysis of the healthcare stakeholder-identity of the Twitter users who used #DHPSP revealed that the most of participating user accounts belonged to individuals or doctors, with the top three user locations being the United States (501 users), the United Kingdom (155 users), and India (121 users). Analysis of co-occurring hashtags and the full text of the posted tweets further revealed that the major themes of attention in the #DHPSP Twitter-community were related to the coronavirus disease 2019 (COVID-19), medicine and health, digital health technologies, and science communication in general. Overall, these results indicate that the #DHPSP initiative achieved high visibility and engaged a large body of Twitter users interested in the DHPSP focus area. Moreover, the conducted campaign resulted in an increase of DHPSP member enrollments and website visitors, and new scientific collaborations were formed. Thus, Twitter campaigns centered on a dedicated hashtag prove to be a highly efficient tool for visibility-promotion, which could be successfully utilized by healthcare-related open innovation platforms or initiatives

General anaesthetic and airway management practice for obstetric surgery in England: a prospective, multi-centre observational study

There are no current descriptions of general anaesthesia characteristics for obstetric surgery, despite recent changes to patient baseline characteristics and airway management guidelines. This analysis of data from the direct reporting of awareness in maternity patients' (DREAMY) study of accidental awareness during obstetric anaesthesia aimed to describe practice for obstetric general anaesthesia in England and compare with earlier surveys and best-practice recommendations. Consenting patients who received general anaesthesia for obstetric surgery in 72 hospitals from May 2017 to August 2018 were included. Baseline characteristics, airway management, anaesthetic techniques and major complications were collected. Descriptive analysis, binary logistic regression modelling and comparisons with earlier data were conducted. Data were collected from 3117 procedures, including 2554 (81.9%) caesarean deliveries. Thiopental was the induction drug in 1649 (52.9%) patients, compared with propofol in 1419 (45.5%). Suxamethonium was the neuromuscular blocking drug for tracheal intubation in 2631 (86.1%), compared with rocuronium in 367 (11.8%). Difficult tracheal intubation was reported in 1 in 19 (95%CI 1 in 16-22) and failed intubation in 1 in 312 (95%CI 1 in 169-667). Obese patients were over-represented compared with national baselines and associated with difficult, but not failed intubation. There was more evidence of change in practice for induction drugs (increased use of propofol) than neuromuscular blocking drugs (suxamethonium remains the most popular). There was evidence of improvement in practice, with increased monitoring and reversal of neuromuscular blockade (although this remains suboptimal). Despite a high risk of difficult intubation in this population, videolaryngoscopy was rarely used (1.9%)

Exploring marginalization and exclusion in renewable energy development in Africa: a perspective from western individualism and African ubuntu philosophy

The objectives of this chapter are to understand the ethical principles that are relevant to the achievement of energy justice; to explore energy marginalization in Africa and to analyse this marginalization from the perspectives of Western and Ubuntu ethics; to underscore the violation of ethics in renewable energy deployment; and to find means of addressing energy injustice through proper application of the respective ethical principles. Part of the data for the study were sourced from the reports of the Renewable Energy for Twenty-First Century (REN21)

Comparative Study of Methods of Determine Amorphous Silicon Solar Cell Parameters

Abstract -The parameters of atypical solar cell represented by an equivalent circuit can be obtained using the experimental current voltage characteristics I-V. This paper presents a comparative study of three methods for determining solar cell parameters of the single diode lumped circuit model. The methods are the simplified explicit method, iterative method and analytical five point method. These parameters values were extracted using these different methods from experimental I-V characteristics of an amorphous silicon cells

Lipid changes in male Albino rats exposed to graded doses of Lead

In order to determine the lipid changes in male albino rats exposed to graded doses of lead as lead acetate for periods of 4, 8 and 12 weeks, a total of 60 male albino rats were divided into four groups as, A, B, C and D. Group A served as the control while groups B, C and D were exposed to 200, 300 and 400 ppm, respectively. At the end of exposure period, blood samples were collected for the determination of lead concentration. Total triglyceride, total cholesterol, high density lipoprotein cholesterol, low density lipoprotein cholesterol and phospholipid concentrations were also determined in the plasma. There was a significant (p < 0.05) period and dose dependent increase in blood lead concentrations in treated groups compared to the control group while plasma triglyceride and cholesterol concentrations followed similar patterns of alterations. The high density lipoprotein cholesterol and low density cholesterol concentrations show varying degrees of alterations, with a significant increase in high density cholesterol fractions while a significant decrease in the low density cholesterol fractions. The phospholipid concentration showed a dose-dependent decrease. It can be concluded that exposure to varying concentrations of lead over varying periods of exposures show accumulation of lead in the blood together with varying alterations in some of the lipid parameters of male albino rats