Economic Studies Research Articles

Optimising the Economic Feasibility of High-Speed Maglev Systems: A Simulation-Based Approach for Variable and Parameter Analysis

This study introduces an advanced software platform and process for the quantitative national economic evaluation of high-speed maglev systems, overcoming limitations of traditional methods through parameter variation experiments and automated solution search. Utilising the adapted German standardised evaluation, this research demonstrates how integrated modelling, evaluation and optimisation software can deeply analyse the impact of various variables and parameters on economic outcomes. By employing an optimisation algorithm, the software not only determines critical evaluation parameters to ensure benefits exceed costs but also deduces optimised model variables. The macroeconomic benefit-cost ratio guides the optimal design concept, with the research finding a critical value for ensuring economic feasibility. The proposed solution achieves a 22% improvement in this ratio (1.106 vs. 0.909) compared to the existing Hefei-Wuhu route, highlighting its potential for large-scale maglev implementation. Future development directions include integration with micro-simulation systems, support for random behaviour, sensitivity analysis, data-driven machine learning and enhanced user interface design for broader applicability. The findings underscore the software’s capability to provide robust, data-driven insights for economic feasibility studies of high-speed maglev systems, presenting a significant step forward in infrastructure project evaluation.

Applying integrated enhanced cognitive behaviour therapy (I-CBTE) to severe and longstanding eating disorders (SEED) Paper 2: An in-depth case study for clinicians

BackgroundThis case study examines the application of Integrated Enhanced Cognitive Behavioural Therapy (I-CBTE) for a patient with severe, longstanding anorexia nervosa and multiple comorbidities, including organic hallucinosis, complex post-traumatic stress disorder (CPTSD), and severe self-harm. Such complex presentations often result in patients falling between services, which can lead to high chronicity and increased mortality risk. Commentaries from two additional patients who have recovered from severe and longstanding anorexia nervosa are included.Case studyThe patient developed severe anorexia nervosa and hallucinosis after a traumatic brain injury in 2000. Despite numerous hospitalisations and various psychotropic medications in the UK and France, standard treatments were ineffective for 17 years. However, Integrated Enhanced Cognitive Behaviour Therapy (I-CBTE) using a whole-team approach and intensive, personalised psychological treatment alongside nutritional rehabilitation proved effective.MethodsIn this paper, we describe the application of the I-CBTE model for individuals with severe, longstanding, and complex anorexia nervosa, using lived experience perspectives from three patients to inform clinicians. We also outline the methodology for adapting the model to different presentations of the disorder.OutcomesThe patient achieved and maintained full remission from her eating disorder over the last 6 years, highlighting the benefit of the I-CBTE approach in patients with complex, longstanding eating disorder histories. Successful treatment also saved in excess of £360 k just by preventing further hospitalisations and not accounting for the improvement in her quality of life. This suggests that this method can improve outcomes and reduce healthcare costs.ConclusionThis case study, with commentaries from two patients with histories of severe and longstanding anorexia nervosa, provides a detailed description of the practical application of I-CBTE for patients with severe and longstanding eating disorders with complex comorbidities, and extensive treatment histories. This offers hope for patients and a framework for clinicians to enhance existing treatment frameworks, potentially transforming the trajectory of those traditionally deemed treatment resistant.RecommendationsWe advocate the broader integration of CBT for EDs into specialist services across the care pathway to help improve outcomes for patients with complex eating disorders. Systematic training and supervision for multidisciplinary teams in this specialised therapeutic approach is recommended. Future research should investigate the long-term effectiveness of I-CBTE through longitudinal studies. Patient feedback on experiences of integrated models of care such as I-CBTE is also needed. In addition, systematic health economics studies should be conducted.

The Place of World Economy Research in the Heterodox Analytics of Eurasian Integration

Aim. The article shows the increased productivity of heterodox approaches in the part of economics that studies the problems of the world economy, including regional integration.Methods. Illustrations of the apparent paradoxicity (for representatives of the economic mainstream) of geopolitical and world economic dynamics after 2022 are used to explain the importance of analyzing economic processes in the world economy, taking into account approaches of related social disciplines. The connection of some important scientific results of Russian scholars in the field of economics with the achievements of historians, orientalists and cultural scientists, representatives of economic and political geography and studies of international relations is shown.Results. The article describes the boundaries of the mathematization of the considered segment of heterodox analysis related to the unreliability of world economic statistics, with examples of the successful application of approximate (in a broad sense relative to mathematical terminology) calculations to assess shifts in foreign trade and foreign direct investment in contemporary Russia. The author demonstrates that the heterodox approach reveals the absence of contradiction between Russia’s intensification of Eurasian economic integration (including within the narrow limits of the EAEU) and our country’s efforts to build a more equitable polycentric world order, including strengthening the BRICS format. Greater interdisciplinary transparency for heterodox economists against the background of representatives of the mainstream, among other things, makes it possible to intensify fruitful cooperation between scientists and practical analysts representing analytical centers — think tanks of the post-Soviet space and neighboring countries in the interests of developing integration projects.Conclusions. The proposed methodological framework can enhance the effectiveness of the work of the analytical community of Russia and its friendly countries in obtaining new applied conclusions in the economic sphere, especially in terms of enhancing the effectiveness of integration efforts in Greater Eurasia. At the same time, heterodox economists are more receptive to cooperation with historians, political scientists and other analysts who have focused on Eurasian economic integration.

Mediating role of self-esteem on university students’ physical activity attitude and frequency

Background and Study Aim. The health benefits of physical activity are well-known. Despite this, there is an ongoing decline in total physical activity (PA), especially among adolescents and young women. This decline points to the need to find more effective solutions. This study aimed to determine the relationship between physical activity and attitudes toward physical activity, and also between self-esteem body image (as subjective variables) and body mass index (as an objective variable). Material and Methods. This cross-sectional study measured and investigated 152 female students from various faculties in their first and second years of study at the Bucharest University of Economic Studies. The research utilized direct anthropometrical measurements and several self-reported instruments. These included questionnaires on self-esteem body image, physical activity attitude, and a report on the frequency of physical activity. Self-esteem was assessed using the Rosenberg Self-Esteem Scale. Body dissatisfaction was evaluated using the Contour Drawing Rating Scale. Results. The mean Body Mass Index (BMI) value of 20.89 kg/m² indicates a healthy, normal BMI. The mean self-esteem score (31.48) falls within the normal range, but 60% of respondents could not match their actual body shape with their ideal or desired body image. 54% of respondents reported engaging in 30 minutes of physical activity, three times a week, outside the university program. As a result, the mean value of the attitude towards physical activity is slightly positive. 33% of young women's self-esteem is related to physical factors such as body image, frequency of physical activity, and attitude towards physical activity. Conclusions. The study indicates that targeted physical education programs and consistent, independent physical activity can mitigate the challenges associated with the investigated variables. Moreover, self-esteem significantly mediates the relationship between body image and physical activity frequency, as well as students’ attitudes toward physical activity.

Exploring the foundations of Islamic moral economy: a return to substantive morality

Purpose This paper aims to explore the general flaws in the theorization of Islamic economics, particularly its failure to incorporate substantive morality into its framework. Since a considerable number of Islamic economic studies remain within the bounds of instrumental morality, this paper seeks to propose an alternative understanding of Islamic economics by emphasizing the essential role of Islamic moral economy (IME) through substantive morality. Design/methodology/approach The study critically examines the theorization of Islamic economics through a discursive methodology. The adopted method and strategy allow for the discursive evaluation of conceptual developments within the field of modern Islamic economics. It proposes an authentic definition of IME by outlining its paradigmatic framework of political economy, value system, axiomatic approach and operational principles. Findings Islamic economics has been theorized in a reactive and reflexive manner, aiming to provide an alternative to the neoclassical hegemonic discourse. However, it has largely neglected its inherent moral dimension, focusing instead on instrumental morality and failed to embed substantive morality into its system. By introducing an alternative reading of Islamic economics, this study presents IME as a distinct economic model that centers substantive morality in its theorization. Originality/value This paper contributes to the existing literature by offering a novel perspective on Islamic economics that challenges the prevalent instrumental approach and emphasizes the importance of substantive morality. It provides a comprehensive framework for understanding IME as a distinct economic model, thereby enriching the discourse on Islamic economics with an authentic and morally grounded paradigm.

Monetary Policy and Its Impact on Income Distribution in Iraq for the Period 2003-2022

The problem of inequality in the distribution of income is one of the important economic variables that have been focused on in economic studies and research, and the study and analysis of the impact of economic variables in the redistribution of income is of great importance, whether in developed or developing economies, as justice in income redistribution can have important economic effects. This study goes to estimate the impact of some monetary indicators on income distribution in Iraq for the period 2003-2022, where this impact was estimated using the Joint integration according to the self-regression model of distributed slowdown (ARDL) and bound test the results of the test confirmed the existence of a significant impact of the monetary policy indicators represented by the exchange rate, the broad money supply and the interest rate in the redistribution of income in Iraq.

Preventing type 2 diabetes in Portugal: a novel person-centered digital intervention

Abstract Introduction Diabetes, particularly type 2 diabetes (T2D), stands as one of the leading noncommunicable diseases worldwide. In Portugal, the prevalence of diabetes has surged, with T2D affecting 14% of adults in 2021. Its repercussions extend beyond individual health, deeply impacting familial, social, and community dynamics, presenting a significant public health challenge globally. Objectives The VA|PREVENTION project (https://doi.org/10.54499/2022.02969.PTDC) aims to assess the (cost-) effectiveness and implementation of an innovative person-centered digital intervention to prevent T2D among high-risk adults. Methodology A comprehensive approach encompasses the Behavior Change Wheel for intervention design, scalability principles, the WHO guidelines for digital health interventions, co-design, and the ISO framework for usability assessment. Evaluation will be pursued through a type 1 hybrid effectiveness-implementation study (randomized controlled trial), supplemented by qualitative and economic studies. Results The web application prototype features Ema, an automated virtual human coach (VHC), educational menus and a dashboard (version 1.0). Co-design included 2 workshops with 11 representatives of end-users and health professionals. Ema uses standardized techniques from an ontology to support behavior change, based on an initial assessment of low-level target behaviors (e.g. walking, fruit consumption, and reducing red meat intake), and barriers to performing these behaviors. Ema communicates in a helpful-cooperative style using a synthetic voice in European Portuguese, with its speech also appearing as subtitles on the interface. Users interact with Ema by pressing buttons or entering data, such as the daily number of steps. Ethics approval was granted for usability assessment with end-users. Conclusions The project is expected to yield health, scientific, technological, and policy impacts, powered by an exploitation and sustainability roadmap. Key messages • Innovative type 2 diabetes prevention through a scalable web app with a virtual human coach. • Comprehensive and robust approach for developing and evaluating the digital behavior change intervention.

2.M. Scientific session: Economics of Mental Health in the interplay between health systems and public health

Abstract Mental health systems and services are essential components of the public health infrastructure, serving as frontline for prevention and intervention for health overall. Despite this, access to mental health services remains largely inadequate, with the OECD calculating that only about one in three people with mental health problems has access to quality treatment across 19 EU Member States. The economics of mental health play an important role in determining the allocation of resources, the accessibility of services and the overall effectiveness of interventions. Effective planning requires an understanding of population needs, service gaps and utilization patterns, in order to ensure equity and health improvement. In fact, the conceptualisation of the economic dimensions of mental health enables policymakers, practitioners, and stakeholders to make informed decisions that optimize resource utilization and maximize societal benefits. The proposed workshop will build on previous activities of the EUPHA Section on Public Health Economics at EPH, including the recent establishment of a working group on the economics of mental health. The aim of the meeting is to promote the adoption of best practices and methodologies in the conduct of economic studies on mental health. As such, the workshop will provide an opportunity to discuss the unique challenges of economic evaluation in this field and to present relevant ongoing activities by members of the Section and other invited experts. Key messages • Mental health, its distribution and at-risk populations influence resource allocation and policy decisions within mental health systems. • Tackling inequalities in mental health is essential for promoting health equity and social justice, requiring evidence-based interventions and policy initiatives to empower marginalized communities.

Cost-effectiveness of oral versus injectable disease modifying therapies in relapsing multiple sclerosis: a systematic review analysis

BackgroundMultiple sclerosis (MS) is a chronic and progressive neurological autoimmune disease that affects the central nervous system. There are two types of drugs used to treat this disease: injectable and oral drugs. The present study aimed at systematically reviewing the cost effectiveness of oral versus injectable drugs.MethodsThe researchers searched the PubMed, Scopus, and Web of Science databases to find relevant studies. After removing the duplicates, two authors independently assessed the records. The studies that had conducted full economic evaluations of oral versus injectable drugs in MS patients were included. The Quality of Health Economic Studies (QHES) tool was also used to assess the quality of the studies.ResultsThirty studies that had conducted the economic analysis of oral versus injectable therapies in MS patients were included in this review. The QHES scores for all records were generally high (≥ 77) and they were of good quality. The lowest and highest levels of incremental net monetary benefit were respectively obtained through the comparison of Fingolimod and Alemtuzumab (-1,419,333) and the comparison of Teriflunomide and Interferon β-1a (1,792,810). The amount of INMB (incremental net monetary benefit) in the comparisons between oral and injectable drugs showed that the highest and lowest amount of INMB calculated between) Fingolimod and injectable drugs, respectively, compared to (interferon β-1a) 98,253 and (Ocrelizumab) -212,417, the highest amount in dimethyl fumarate is also against (peginterferon β-1a) 191,470 and the lowest against (alemtuzumab) -124,333, Teriflunomide against injectable drugs is the highest against (peginterferon β-1a) 89,956 and the lowest (Ocrelizumab) − 194,169, as well as Cladribine compared to injectable drugs, the highest was compared to (interferon β-1a) 236,430 and the lowest (Ocrelizumab) was 23,965.ConclusionA large number of health economic evaluations of disease-modifying therapies (DMTs) in MS were available at the international level, the comparison of which was difficult and sometimes contradictory. However, despite the difference in the results, Cladribine tablets were cost-effective in all studies compared with injectable drugs. In addition, the present study could be of great importance for policymakers and other beneficiaries regarding the cost-effectiveness of the aforementioned drugs.

An economic study to evaluate the rates of trade exchange between Egypt and the COMESA countries In light of recent economic changes

An economic study to evaluate the rates of trade exchange between Egypt and the COMESA countries In light of recent economic changes

Cost-Effectiveness of Perinatal Depression Screening: A Scoping Review.

Perinatal depression (PND) has emerged as a significant public health concern. There is no consensus among countries or organizations on whether to screen for PND. Despite the growing body of evidence regarding the economic value of PND screening, its cost-effectiveness remains inadequately understood due to the heterogeneity of existing studies. This study aims to synthesize the available global evidence on the cost-effectiveness of PND screening compared to routine or usual care to provide a clearer understanding of its economic value. A detailed search strategy was predetermined to identify peer-reviewed publications that evaluated the cost-effectiveness of PND screening. We designed a scoping literature review protocol and searched electronic databases, including MEDLINE, EMBASE, and Web of Science, for studies published from inception to 10 December 2023. We included studies that conducted full economic evaluations comparing PND screening with usual care or other comparators and excluded studies that were not in English or lacked full texts. The Consolidated Health Economic Evaluation Reporting Standards (CHEERS) checklist was used to evaluate the reporting quality of the studies. Then, the data regarding costs and effectiveness were extracted and summarized narratively. A total of ten eligible studies were included, all of which were evaluated as being of high reporting quality. Nine of these studies compared the economic value of PND screening with usual care without screening, with eight finding that PND screening was generally more cost-effective. The remaining study evaluated the cost-effectiveness of two psychosocial assessment models and indicated that both effectively identified women "at risk". Across studies, PND screening ranged from being dominant (cheaper and more effective than usual care without screening) to costing USD 17,644 per quality adjusted life year (QALY) gained. Most included studies used decision trees or Markov models to test if PND screening was cost-effective. Although current economic evaluation studies have mostly suggested PND screening could be more cost-effective than usual care without screening, there is high heterogeneity in terms of participants, screening strategies, screening settings, and perspectives across studies. Despite varied settings and designs, most studies consistently indicate PND screening as cost-effective. Further evidence is also required from low- and middle-income countries (LMIC), non-Western countries, and randomized controlled trials (RCTs) to draw a more robust conclusion.

Real-world clinical and economic outcomes from rapid start antiretroviral therapy in HIV: systematic review and meta-analysis.

We aimed to synthesize clinical and economic outcomes of rapid start versus non-rapid antiretroviral therapy (ART) in people with HIV (PWH) in real-world settings. A search was conducted in PubMed, Embase, Web of Science, and ProQuest from January 2017 to January 2023, supplementing a previous search by Ford et.al, 2018. Observational studies investigating clinical or economic outcomes of rapid start ART versus non-rapid ART in PWH were included. Clinical outcomes were mortality, loss-to-follow-up (LTFU), and viral suppression. Economic outcomes were Incremental cost-effectiveness ratio (ICER) values and per patient per month (PPPM) costs. Meta-analyses using random-effects models were performed for clinical outcomes, while qualitative syntheses were conducted for economic outcomes. The quality of clinical and economic studies was assessed. Sixty-two studies were included. The pooled adjusted risk ratio (aRR) for mortality demonstrated a significant reduction in risk of mortality among participants who received rapid start ART compared to non-rapid ART (0.80, 95%CI, 0.65-0.98). For LTFU at 6 and 12 months, the pooled aRR showed increased LTFU for rapid start ART (1.33, 95%CI, 1.15-1.55 and 1.18, 95%CI, 0.74-1.89 respectively). All cost-effectiveness studies reported cost-saving or cost-effective findings. The PPPM costs of rapid start ART across the first 36 months of treatment were consistently lower than non-rapid ART. Rapid ART is associated with reduced mortality and is cost-effective compared to non-rapid ART in real-world settings. Clinicians and policymakers should consider these findings to facilitate rapid start of ART in PWH. Further research on LTFU in PWH is needed.

Economic burden of sarcopenia-related disability in the elderly population: a study in Iran

ObjectiveSarcopenia is linked to escalating health costs, heightened risk of physical disability, diminished quality of life and an increased demand for care services. This study aimed to assess the economic impact of sarcopenia-related disability in Iran. A prevalence-based economic burden study was conducted utilizing the Population Attributable Risk (PAR) method, based on 2022 price index. Prevalence data for sarcopenia, categorized by gender and disease severity, were extracted from recent comprehensive studies. The relative risk of sarcopenia disability was determined from the most robust available evidence. Subsequently, direct medical costs, direct non-medical costs, and indirect costs for each individual with sarcopenia were computed and adjusted to 2022 values to estimate disability costs.ResultsTaking into account the prevalence of sarcopenia and the Iranian population across various age groups, 2,192,168 adults aged ≥ 60 years with sarcopenia in Iran were included. The total PAR of sarcopenia for men and women was estimated at 49% and 28%, respectively. The cumulative direct medical costs, direct non-medical costs, and indirect costs amounted to $215.1 million, $7.76 million, and $34.1 million, respectively. Additionally, the average total economic burden of sarcopenia-related disability in Iranian population aged ≥ 60 years was estimated at $257.1 million.

Implementing of a grid-connected PV energy system in building with medium consumption: A techno- economic case study

Renewable energy sources facilitate decentralized electricity production, reducing dependence on fossil fuels and contributing to a sustainable energy era. Algeria is one of the countries implementing a policy aimed at energy transition, with buildings playing a major role in this process. They consume more energy than any other sector and therefore significantly contribute to climate change. While various projects related to energy efficiency are being carried out, they are mostly limited to rural and Saharan areas or low-consumption residential buildings. The objective of this paper is to demonstrate the feasibility of integrating a grid-connected photovoltaic system into a medium-consumption building located in one of Algeria’s major cities, Constantine, to meet the building’s electrical energy demand. This paper presents a methodology for optimally sizing a grid-connected photovoltaic system to supply power to the Institute of Nutrition, Food, and Agro-Food Technologies (INATAA) in Constantine, Algeria. The technical and economic aspects of the system’s components were considered to determine the most feasible configuration, using real data from the institute and the HOMER Pro simulation software. The simulation results show that the grid-connected PV system, without storage, can meet the institute’s energy demand (with 671,061 kWh/year of energy produced, of which 81.3 % is photovoltaic energy). This configuration offers the lowest costs, with a Net Present Cost (NPC) of $748,413 and a Cost of Energy (COE) of $0.0894/kWh. Therefore, integration of a grid-connected photovoltaic system in medium-consumption buildings can effectively meet energy needs while reducing costs. Thus, this study demonstrates the technical and economic feasibility of such system to support the energy transition in urban areas in Algeria.

Forecasting Using the Markov Chain Transition Matrix for Exchange Rate Fluctuations

The current research is preparing an economic statistical study on exchange rate fluctuations for the period from ( 1996 to mid-2005 ) according to the well-known phrase: (The present is the past and the future is the present ). It is a modest attempt to crystallize this type of price in a scientific-statistic method by adopting the matrix of transitional probabilities in Markov chains, as these chains are among the models that are relied upon in the process of forecasting when the data are in the present time and in three cases: - High - Low - Stability. Between the past, the present and the future, the researcher was able to reach in his research to the analysis by applying the method of the greatest places, and to achieve the main purpose of this research, the researcher dealt with four chapters as follows: The first chapter dealt with the problem of research, its importance, need, purpose and determination of its terms. The second chapter reviewed the previous studies published on the subject, as well as the theoretical aspect, in which the matrix of transitional and stable possibilities, the state of stability and independence of the Markov chains, and the estimation of transitional possibilities in the greatest possible way were presented. As for the third chapter, it included the practical aspect and the field application. The data related to the research procedures were collected from the date of (17/10/2003 to 30/6/2005), in which the Iraqi currency was exchanged from the old to the currency currently in circulation, and in which the situation of the Iraqi market suggested great relative stability at the time. Finally, the fourth chapter of this research included the conclusions reached by the researcher from which it came: The market was characterized by a state of stability after the rise in the exchange rate against the dollar, which confirmed the accuracy of the results of the matrix of transitional possibilities, which was reflected on the local stock exchange, as well as the development of recommendations that can be used by the relevant parties.

Health and Economic Outcomes of Offering Buprenorphine in Homeless Shelters in Massachusetts

Overdose is the leading cause of death among people experiencing homelessness (PEH), but engagement in medication treatment is low in this population. Shelter-based buprenorphine may be a strategy for increasing initiation and retention on lifesaving medications. To estimate clinical outcomes and conduct an economic analysis of statewide shelter-based opioid treatment in Massachusetts. This economic evaluation study in Massachusetts used a cohort state-transition simulation model. Two cohorts were modeled starting in 2013, including (1) a closed cohort of a fixed population of PEH with history of high-risk opioid use over their lifetimes and (2) an open cohort in which membership could change over time, allowing assessment of population-level trends over a 10-year period. Data analysis occurred from January 2023 to April 2024. Model exposures included (1) no shelter-based buprenorphine (status quo) and (2) offering buprenorphine in shelters statewide. Outcomes included overdose deaths, quality-adjusted life-years (QALYs) gained, and health care and modified societal perspective costs. Sensitivity analyses were conducted on key parameters. In the closed cohort analysis of 13 800 PEH (mean [SD] age, 40.4 [13.1] years; 8749 male [63.4%]), shelter-based buprenorphine was associated with an additional 65.4 person-weeks taking buprenorphine over an individual's lifetime compared with status quo. Shelter-based buprenorphine was cost saving when compared with the status quo, with a discounted lifetime cost savings from the health sector perspective of $1300 per person, and 0.2 additional discounted QALYs per person and 0.9 additional life-years per person. In the population-level simulation, 254 overdose deaths were averted over the 10-year period with the shelter-based buprenorphine strategy compared with the status quo (a 9.2% reduction of overdose deaths among PEH in Massachusetts). Overdose-related and other health care utilization undiscounted costs decreased by $3.0 million and $66.4 million, respectively. Shelter-based opioid treatment generated $44.7 million in additional medication and clinical costs, but saved $69.4 million in overdose and other health costs. In this economic evaluation of clinical and economic outcomes among PEH, shelter-based buprenorphine was associated with fewer overdose deaths and was cost saving. These findings suggest that broad rollout of shelter-based buprenorphine may be an important tool in addressing the overdose crisis.

Evaluation of Reporting Quality of Systematic Reviews on Health Economic Evaluation Studies Based on the CHEERS Statement: An Overview of Reviews.

Economic evaluations in healthcare are designed to inform decisions by the estimation of cost and effect trade-off of two or more interventions. We aimed to evaluate the standards of systematic reviews on health economic evaluation studies using the CHEERS (Consolidated Health Economic Evaluation Report Standards) tool. We searched the PubMed database with keywords CHEERS and its complete form in combination with keywords related to cost or economic evaluation without language and time limits until November 17, 2021. The CHEERS tool was then used to include systematic reviews. Overall, 32 systematic reviews, included 610 primary studies were included. Of the 32 included studies, only 1 study (3.1%) had poor quality, 5 studies (15.6%) had good quality, remaining studies had very good and excellent quality. Some studies still have problems in expressing the standards. The necessity of standards for reporting economic evaluation studies in the field of health is very serious, and Cheers is one of the most important tools.

Supercritical Extraction of Ylang Ylang (Cananga odorata) Essential Oil at the Near-Critical Region

The flowers of the ylang ylang tree contain an essential oil which is utilized in high-quality perfumes. The traditional mode of extraction is by steam distillation but it has been shown that the more modern supercritical fluid extraction (SFE) using carbon dioxide has potential for replacing steam distillation. This technology, however, generally operates under high pressures, up to 500 bar. The work described in this paper examines the possibility of using carbon dioxide at much lower pressures, close to the critical point, i.e., 75 bar and 30 °C. Two series of experiments were therefore carried out under such conditions, the first using carbon dioxide alone and the second utilizing ethanol as a co-solvent, the conditions being chosen by applying the Design of Experiments (DOE) technique over ranges of pressure from 80 to 120 bar and temperatures from 35 to 50 °C. Extraction curves are presented which show the rates of extraction to be significantly increased by the use of the co-solvent, with the measured values being 0.74% to 0.97% with no co-solvent addition, increasing to 0.92% to 1.16% with co-solvent addition. These rates are, however, lower than the rates previously reported at higher pressures, i.e., 0.9 to 1.8%. Better quality oils are, however, produced compared to those at higher pressures, with the major components being benzene benzoate, benzene salicylate, cubebene, and benzyl acetate. It is recommended that an economic study be carried out to evaluate whether it is feasible to utilize this process commercially.

Techno economic study of floating solar photovoltaic project in Indonesia using RETscreen

The utilization of solar energy is crucial for the advancement of sustainable power generation on a worldwide scale, driven by environmental concerns and the depletion of fossil fuels. Indonesia's goal is to achieve carbon neutrality by 2060 and it is aggressively advocating for solar energy, which includes the implementation of new methods such as floating photovoltaic (PV) systems. This study evaluates the Techno-Economic Feasibility of Indonesia's Cirata 145 MW floating solar PV project by employing RETScreen technology. The objective is to improve the long-term financial stability, decrease greenhouse gas emissions, and suggest viable choices for improvement. Examining three scenarios that involve alterations in carbon emissions, energy pricing, and loan interest rates demonstrates different levels of project feasibility. The introduction of carbon tax emission pricing has a substantial impact on the feasibility of projects. This study provides useful insights into doing techno-economic feasibility assessments using RETScreen for floating photovoltaic (PV) systems. It demonstrates how modifying parameters can effectively mitigate project risks.

Factors Affecting Learners’ Decision to enrol in Commercial Subjects – A Case of the Chris Hani District, Eastern Cape Province, South Africa

Commercial subjects such as Accounting, Economics and Business Studies are an important stream in schools that help learners broaden their social and global knowledge. The purpose of the study was to identify the factors that influence learners’ decisions to enrol in commercial subjects. A case study served as the foundation for the study’s qualitative methodology. The study was based on Berger and Calabre’s (1983) Uncertainty Reduction Theory. The study purposely sampled ten learners from two secondary schools in the Chris Hani District, Eastern Cape Province, South Africa. Individual interviews were used to collect the data, which were then analysed using content analysis (CA) and categorised using thematic analysis. The findings proved that several factors, including learners’ ability in the subjects and the influence of teachers and parents, influenced their decision to enrol in commercial courses. The study recommends that learners should first be counselled, mentored, and assisted in making decisions about the choice of subjects. Lastly, schools should conduct aptitude and interest assessments. The contribution of this study is to provide insights on improving curriculum design and career guidance around commercial subjects in this region as well as to inform educational stakeholders on how to address potential barriers to enrolment in commercial subjects and lastly serve as a foundation for broader studies on commercial subject enrollment in South Africa. Keywords: Commercial Subjects; Learner’s decision; Subject Stream