Purpose This article investigates the dynamic implication of healthcare expenditure on economic growth in the selected ten Sub-Saharan African countries over the period 2000–2018. ...Design/methodology/approach The study methodology included dynamic heterogenous panel, using mean group and pooled mean group estimators. The investigation of the healthcare expenditure and economic growth nexus was achieved while controlling the effects of investment, savings, labor force and life expectancy via interaction terms. Findings The results from linear healthcare expenditure have a significant positive impact on economic growth, while the nonlinear estimates through the interaction terms between healthcare expenditure and investment have a negative statistically significant impact on growth. The marginal effect of healthcare expenditure evaluated at the minimum and maximum level of investment is positive, suggesting the impact of health expenditure on growth does not vary with the level of investments. This result responds to the primary objective of the article. Research limitations/implications In policy terms, the impact of investment on healthcare is essential to addressing future health crises. The impact of coronavirus disease 2019 (COVID-19) can never be separated from the shortages or low prioritization of health against other sectors of the economy. The article also provides an insight to policymakers on the demand for policy reform that will boost and make the health sector attractive to both domestic and foreign direct investment. Originality/value Given the vulnerability of SSA to the health crisis, there are limited studies to examine this phenomenon and first to address the needed investment priorities to the health sector infrastructure in SSA.
Posttreatment of titanium oxide (TiO2) using lithium (Li) and cobalt (Co) precursors is widely adopted to modify the charge quenching property in perovskite solar cells (PSCs); however, the ...fundamental understanding of the effect of the modification layer on the material itself and, consequently, the photovoltaic performance stability is not complete. In this work, in situ X‐ray diffraction measurements show that the Li and Co ions can diffuse into TiO2 and consequently accelerate the rutile phase transformation. X‐ray photoelectron spectroscopy results reveal the appearance of a Ti3+ feature in both the Li‐ and Co‐treated samples, suggesting that the treatment ions are partially located at the subsurface/surface of the spin‐cast TiO2 layer. The Li‐treated TiO2 exhibits greatly upshifted conduction band edges, which benefits charge extraction properties and improves the average device parameters in a complete PSC. To complement the experiments, density functional theory calculations are performed. While Li treatment initially results in enhanced electronic properties, Li‐treated TiO2 tends to have more surface vacancies over time and is more susceptible to adsorption and accumulation of iodide ions compared to the Co‐treated sample, which is experimentally supported by surface photovoltage spectroscopy and time‐resolved photoluminescence results.
Photovoltaic materials are impacted by the photoinduced charge separation behavior, which can be further improved by modifying the underlying layer that the perovskite is prepared on top of. The impacts of using alkali salts on porous TiO2 from experimental and computational points of view are investigated to understand such surface passivation of a solar cell device.
Photovoltaic Performance Stability
The most fundamental properties of photovoltaic materials are impacted by the photoinduced charge separation behavior, which can be improved by modifying the ...underlying layer that the perovskite is prepared on top. In article number 2201632, Non Thongprong, Nopporn Rujisamphan, and colleagues investigate the impacts of using alkali salts on porous TiO2 from experimental and computational points of view to provide a better understanding of such surface passivation.
The developing world has always been a spectator and consumer participant in the ICT technology since the pioneering computing years of post second world war of world economic growth. The developed ...world led by the US, Europe, Japan, and later South Korea have surged far ahead in ICT being represented by their own creation of microprocessor platforms evolving into an exclusive club which they locked with licensing. Their early advantage of mostly trial and error processor designs have proven to be a market success that discouraged new aspiring contenders. New CAD tools have arrived along with the cloud computing model presenting new opportunities. Major ICT developments such as the Microsoft Catapult project in 2012, and the Intel purchase of Altera for USD16.7 billion in 2016 should be perceived as alert warnings. To us this is the perfect time to capitalize on the mistakes of the earlier processor designs to create a new and novel 32-bit processor for the rest of the free world to hop along the ICT revolution into the cloud and IoT applications on Freeware platform as active creative participants. These aspirations have to begin at the education level with an easy to learn 32-bit processor model.
Mycobacterium tuberculosis is a respiratory bacterial pathogen that causes Tuberculosis. About one-quarter of the global population is infected, most of which are asymptomatic with a 5–15% risk of ...developing active disease across their lifespan. The progression of the disease has been enhanced by HIV coinfection and the emergence of Mycobacterium tuberculosis strains that are resistant to first-line anti-TB drugs, especially Rifampicin. Rifampicin resistance is brought about by mutation in the gene coding for beta-subunit of the enzyme RNA polymerase (rpoB) and is a surrogate marker for multidrug-resistant Tuberculosis (MDR-TB). Herein, using the GeneXpert MTB/RIF molecular technique, we examined the incidence of Mycobacterium tuberculosis infection and evaluate rpoB gene mutation among Mycobacterium tuberculosis isolates identified from presumptive pulmonary tuberculosis (PTB) and extra-pulmonary tuberculosis (EPTB) patients attending the directly observed treatment short-course (DOTS) clinic, University of Maiduguri Teaching Hospital, Nigeria. A total of two thousand four hundred and fifty-one (2451) presumptive TB cases (PTB = 2279, EPTB = 172) were analyzed from January 2018 to July 2019. The incidence of Mycobacterium tuberculosis infection was 22.68% (Mean±S.E = 46.33 ± 15.41). The incidence of Rifampicin-resistant Mycobacterium tuberculosis was 4.50% (Mean±S.E = 2.08 ± 1.02). The incidence of Mycobacterium tuberculosis and HIV co-infection was 16.59%, while the incidence of Rifampicin-resistant Mycobacterium tuberculosis and HIV co-infection was 4.23%. The peak incidence of M. tuberculosis infection was observed during the first quarter of each year and this variation was observed to be statistically significant (f = 9.34606; p < .05; CI95; p = 0.000068). Incidence of Rifampicin-resistant Mycobacterium tuberculosis was observed to be more prevalent among female patients that are 15 years or older (Fischer's exact test = 0.533; p < .05; CI95; p = 0.465348). The incidence rates reported herein are higher than the WHO-reported national average. By this report, it can be affirmed that the incidence of Mycobacterium tuberculosis infection in northeastern Nigeria is increasing and the rate of infection follows a seasonal trend.
Background: The coronavirus pandemic and Its “pandemic-fear,” is expected to come with lots of mental health challenges. Despites several global health vanguards sounding this alarm, there is paucity ...of systematic analysis of mental health distress and resilience being experienced by individuals undergoing treatments in isolation centres for coronavirus disease (COVID-19).Objectives: This study evaluated the pattern of mental distress and resilience in COVID-19 patients undergoing isolation-care in some treatment facility in Kaduna-Nigeria.Method: Data were collected cross-sectionally from 261 participants. These were sociodemographic and clinical variables, measures of mental distress (i.e. depression and anxiety), and well-being (i.e. resilience). Statistical analysis was carried out using SPSS version 21.Results: The mean age of participants was 35.6 years (SD = 11.1), with majority being males (73.6%) and without prior chronic medical condition (73.9%). Mental distress rates were 33.0% for depression and 19.2% for anxiety. Majority (97.1%) had good resilience characteristics. Significant variable associated with low mental distress and high resilience is belonging to age group 40 years and above. Also, resilience was moderately and significantly related to mental distress.Conclusion: Mental distress is relatively high among COVID-19 patients undergoing isolation-treatment. This rate is associated with age group of below 40 years and having low resilience characteristics. Efforts to boost resilience among COVID-19 might institute preventive measures against mental distress.
This paper investigates the short-term dynamics as well as the long-term relationship between natural gas consumption and economic growth in Nigeria, taking breaks into account. The techniques ...employed include Shahbaz-Omay-Roubaud unit root test with sharp and smooth breaks and autoregressive distributed lag (ARDL) model with breaks. The results revealed that natural gas consumption is positively related to growth both in the short-term and long-term but only significant in the latter. However, there is evidence of bidirectional causality in the long-term and unidirectional causality in the short-term, from growth to natural gas consumption. The implication of the findings is that natural gas is a contributing factor to the growth of the Nigerian economy, and any energy policy aimed at increasing the consumption of natural gas could lead to the increase in economic growth and that Nigerian authorities could adopt energy conservation policies in the short-term so as to take the issue of global warming into consideration. Therefore, the paper recommends stepping up efforts to increase natural gas consumption by building more gas storage facilities, pipeline installations, exploring alternative energy sources, raising awareness/enlightenment about the uses of natural gas, suitability in its use, economic and environmental benefits of its use, ensuring its affordable availability, and beeping up security against pipelines vandalization. Moreover, in the short-term, the country could enact energy conservation policies to combat global warming.
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