Participation of Electric Vehicle Aggregators in Wholesale Electricity Markets: Recent Works and Future Directions

Electric Vehicles are key to reducing carbon emissions while bringing a revolution to the transportation sector. With the massive increase of EVs in road networks and the growing demand for charging services, the electric power grid faces enormous system reliability and operation stability challenges. Demand and supply disparities create inconsistency in the smooth delivery of electrical power. As a potential solution, EVs and their charging infrastructure can be aggregated to prevent the unwanted effects on power systems and also facilitate ancillary services to the power grid. When not need for transportation purposes, EVs can leverage their batteries for power grid services by participating in the electricity market via mechanisms coordinated by system operators. Hence, the market participation of EV infrastructure can help alleviate the power grid stress during peak periods. However, further research is needed to demonstrate the multiple benefits to both EV owners and power grid operators. This paper briefly overviews the existing literature on market participation of EV aggregators, discuss associated challenges and needs, and propose research directions for future research

Presenting a Framework for Earnings Forecasts Reporting in the Iranian Capital Market

The earnings forecasts report is considered as one of the most important and effective reports in investors' decision-making. The purpose of this study is to present an earnings forecasts reporting framework in Iran's capital market. To achieve this research goal, the earnings forecasts reporting framework was identified first by studying the theoretical foundations and the background of the research, as well as interviewing 21 experts using the snowball method and the theme analysis method. Then, through the implementation of the fuzzy Delphi method and solicitation of opinions from 183 experts using a questionnaire and targeted judgmental sampling method, a consensus was reached on the reporting framework, resulting in the presentation of the earnings forecasts reporting framework in Iran's capital market. The research population included university faculty members, employees in regulatory organizations, investors, auditors, and providers of financial information. The research results showed that out of 122 detailed themes extracted through theme analysis, categorized into six main themes and 14 sub-themes, 97 detailed themes obtained the consensus among the Delphi group, thereby forming components of the earnings forecasts reporting framework. The main elements of the earnings forecasts reporting framework encompass generalities, environmental fields, characteristics, consequences, challenges, and evaluation. The findings of this research can serve as a guide for developing financial reporting standards and modifying procedures and regulations.IntroductionThe management forecasts earnings is one of the disclosed information outside the financial statements, which reflects the management's forecast about the future prospects. This report is one of the most important sources of information for companies in the capital market. Corporate management possesses considerable information advantages about contingencies related to future profitability. Management disclosures are considered a valuable and potential source of information for investors. Investors are interested in estimating the future benefits of their investment so that they can assess receiving future cash earnings as well as the value of their shares. Therefore, the expected earnings from companies are important for investors and beneficiaries to make investment decisions.How to present the earnings forecast report has been a challenging issue in recent years. Therefore, in the current situation, examining the framework and reporting method of earnings forecasting in the Iranian capital market using the opinions of experts is regarded as an essential need.Considering the importance of earnings forecast reporting for investors, the problem of the current research is: What is the earnings forecast reporting framework in Iran's capital market? Additionally, what are the components of this framework based on the country's economic and capital market conditions? Literature ReviewThere are several reasons for disclosing the information of managers and publishing the earnings forecast report. One reason for this is agency theory, which refers to the conflict of interests between managers and owners. In addition, we can refer to the Signaling theory, Expectation adjustment hypothesis, and Legal liability hypothesis.The primary framework of earnings forecasting reporting includes the purpose, users, limitations, environmental fields, characteristics, and consequences.Hirst et al. (2008) provided a framework regarding management earnings forecasting. They categorized earnings forecasts into three components including antecedents, characteristics, and consequences. They concluded that earnings forecasting characteristics are less explored in both theoretical and empirical research, despite managers having the most control over this component.Preussner and Aschauer (2022) synthesized the literature on management earnings forecasts and adaption mechanisms, combined existing theories into a unifying framework. Overall, the literature review provides strong support for a positive correlation between the extent and credibility of management earnings forecasts, on the one hand, and stock returns, share liquidity, and analyst coverage, on the other hand. Earnings forecasts tend to be optimistically biased, with a positive correlation with forecast uncertainty, earnings flexibility, financial distress, investor sentiment, and the share price dependency of managers' remuneration. Firm growth, legal liability, and litigation risk are significantly associated with forecast pessimism.Until 2017, listed companies in Tehran Stock Exchange published an independent report titled earnings forecasts report. The Securities and Exchange Organization announced in a notification that since January 2018, the Issuers are not allowed to publish earnings forecasts report. Instead, they are required to prepare and disclose the management's interpretive report alongside the interim and annual financial statements. Recently, as of July 2021, the return of the earnings forecast report was announced with a new procedure for five industries.MethodologyTo achieve the goal of the research, the primary framework was first identified by studying the literature review and theoretical background. Semi-structured interviews were then conducted with 21 experts using the snowball sampling method. The data from the interview was analyzed using the theme analysis method and the earnings forecasts reporting framework was extracted according to the country's environmental characteristics. Finally, the fuzzy Delphi method was implemented and opinions were gathered from 183 experts through a questionnaire and targeted judgment sampling method to reach a consensus on the earnings forecasts reporting framework.The statistical population of the research included university faculty members, employees in regulatory organizations, investors, auditors, and providers of financial information.ResultsThe research results showed that out of 122 detailed themes extracted through theme analysis, which were categorized into 6 main themes and 14 sub-themes, 97 detailed themes obtained consensus from the Delphi group and were identified as components of the earnings forecasts reporting framework. The main themes of the framework are generalities, environmental fields, characteristics, consequences, challenges, and evaluation. Each main theme consists of sub-themes. For example, the generalities theme includes sub-themes such as purpose, users, and limitations. The environmental fields theme covers aspects related to the forecast environment and company characteristics. The characteristics theme encompasses the method of publishing, features, text of the report, and assurance. The consequences theme addresses the consequences of publishing and non-publishing. The challenges theme explores the challenges in the environment and the company. Lastly, the evaluation theme focuses on the evaluation of the disclosure procedure.DiscussionThe findings of this research can serve as a valuable guide for developing financial reporting standards and modifying procedures and regulations.The paper has some limitations. The use of questionnaires, which is common in humanities research, is inherently limited, and this research is no exception. The time limitation, the diverse knowledge base of the experts, and their interest in the research topic may have influenced the quality of the experts' responses to the questionnaire.ConclusionThis research has presented the earnings forecasts reporting framework in Iran's capital market, consisting of 6 main themes. The results of this study can help Iran's Accounting Standards Development Committee in developing standards. Furthermore, the Securities and Exchange Organization can use the framework, particularly for the evaluation theme to modify and present regulations related to earnings forecasting reporting. Additionally, investors can use the results of this research to enhance their understanding about the earnings forecast report and make more informed investment decisions. Issuers can also use the framework to improve information disclosure and prepare reports.AcknowledgmentsI am grateful to all the esteemed professors and experts who helped me in this way. I would also like to express my gratitude to the staff of Allameh Tabataba’i University for their cooperation

Self-organization of an optomagnetic CoFe2O4-ZnS nanocomposite : preparation and characterization

We report an advanced method for the self-organization of an optomagnetic nanocomposite composed of both fluorescent clusters (ZnS quantum dots, QDs) and magnetic nanoparticles (CoFe2O4). ZnS nanocrystals were prepared via an aqueous method at different temperatures (25, 50, 75, and 100 degrees C). Their structural, optical and chemical properties were comprehensively characterized by X-ray diffraction (XRD), UV-vis, photoluminescence (PL) spectroscopy, scanning electron microscopy (SEM), dynamic light scattering (DLS), transmission electron microscopy (TEM), and infrared spectroscopy (FT-IR). The highest PL intensity was observed for the cubic ZnS nanoparticles synthesized at 75 degrees C which were then stabilized electrosterically using thioglycolic acid. The photophysical analysis of the capped QDs with a particle size in the range 9-25 nm revealed that the emission intensity and the optical band gap increases compared to uncapped nanocrystals (3.88 to 4.02 eV). These band gaps are wider than that of bulk ZnS resulting from the quantum confinement effect. Magnetic nanoparticles were synthesized via a co-precipitation route and a sol-gel process was used to form the functionalized, silica-coated CoFe2O4. Finally, thiol coordination was used for binding the QDs to the surface of the magnetic nanoparticles. The fluorescence intensity and magnetic properties of the nanocomposites are related to the ratio of ZnS and CoFe2O4. An optomagnetic nanocomposite with small size (12-45 nm), acceptable saturation magnetization (about 6.7 emu g(-1)), and satisfactory luminescence characteristics was successfully synthesized. These systems are promising candidates for biological and photocatalytic applications

Voltammetric determination of hydroxylamine in water and waste water samples using a NiO nanoparticle/new catechol derivative modified carbon paste electrode

A (9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximido)-4-ethylbenzene-1,2-diol (DED) mo­di­fied NiO/NPs carbon paste electrode “(DED/NiO nanoparticle (NiO/NPs)/CPE) was constructed for determination of hydroxylamine (HX). The cyclic voltammogram showed that the electro­catalytic oxidation of HX at the surface of DED/NiO/NPs/CPE occurs at a potential of about 800 mV less positive than with an unmodified electrode. Square-wave voltammetry results presented that the electrocatalytic oxidation peak currents of HX in pH 8.0 had two linear dynamic ranges in the range of 0.1 to 2.0 and 2.0 to 400.0 µM HX, with a detection limit of 0.07 µM. The kinetic parameters such as electron transfer coefficient a (0.47) and rate constant (2.454 × 103 M-1 s-1) were determined for the chemical reaction between HX and DED. Finally, this method was evaluated for the determination of HX in water and waste water samples

Paper‑based broadband fexible photodetectors with van der Waals materials

Layered metal chalcogenide materials are exceptionally appealing in optoelectronic devices thanks to their extraordinary optical properties. Recently, their application as flexible and wearable photodetectors have received a lot of attention. Herein, broadband and high-performance paper-based PDs were established in a very facile and inexpensive method by rubbing molybdenum disulfide and titanium trisulfide crystals on papers. Transferred layers were characterized by SEM, EDX mapping, and Raman analyses, and their optoelectronic properties were evaluated in a wavelength range of 405–810 nm. Although the highest and lowest photoresponsivities were respectively measured for TiS3 (1.50 mA/W) and MoS2 (1.13 μA/W) PDs, the TiS3–MoS2 heterostructure not only had a significant photoresponsivity but also showed the highest on/off ratio (1.82) and fast response time (0.96 s) compared with two other PDs. This advantage is due to the band offset formation at the heterojunction, which efficiently separates the photogenerated electron–hole pairs within the heterostructure. Numerical simulation of the introduced PDs also confirmed the superiority of TiS3–MoS2 heterostructure over the other two PDs and exhibited a good agreement with the experimental results. Finally, MoS2 PD demonstrated very high flexibility under applied strain, but TiS3 based PDs suffered from its fragility and experience a remarkable drain current reduction at strain larger than ± 0.33%. However, at lower strains, all PDs displayed acceptable performance

ILSF, A THIRD GENERATION LIGHT SOURCE LABORATORY IN IRAN

Abstract The Iranian Light Source Facility (ILSF) project is a first large scale accelerator facility which is currently under planning in Iran. On the basis of the present design, circumference of the 3 GeV storage ring is 297.6 m. Beam current and natural beam emittance are 400 mA and 3.278 nm.rad respectively. The facility will be built on a land of 50 hectares area in the city of Qazvin, located 150 km West of Tehran. The city is surrounded by many universities, research centers and industrial companies. The design and construction of prototype items such as radio frequency solid state amplifier, dipole magnets, highly stable magnet power supplies and girders have already begun. Site selection studies, including geotechnical and seismological measurements are being performed. Conceptual Design Report, CDR, as the first milestone of the project was published in October 2012

Mechanistic study to investigate the effects of different gas injection scenarios on the rate of asphaltene deposition: An experimental approach

Asphaltene deposition during enhanced oil recovery (EOR) processes is one of the most problematic challenges in the petroleum industry, potentially resulting in flow blockage. Our understanding of the deposition mechanism with emphasis on the rate of the asphaltene deposition is still in its infancy and must be developed through a range of experiments and modelling studies. This study aims to investigate the rate of asphaltene deposition through a visual study under different gas injection scenarios. To visualise the asphaltene deposition, a high-pressure setup was designed and constructed, which enables us to record high-quality images of the deposition process over time. Present research compares the effects of nitrogen (N2), carbon dioxide (CO2) and methane (CH4) on the rate of asphaltene deposition at different pressures. The experimental results in the absence of gas injection revealed that the rate of asphaltene deposition increases at higher pressures. The results showed that the rate of asphaltene deposition in the case of CO2 injection is 1.2 times faster than CH4 injection at 100 bar pressure. However, N2 injection has less effect on the deposition rate. Finally, it has been concluded that the injection of CO2 leads to more asphaltene deposition in comparison with CH4 and N2. Moreover, the experimental results confirmed that gas injection affects the mechanism of asphaltene flocculation and leads to the formation of bigger flocculated asphaltene particles. The findings of this study can help for a better understanding of the mechanism of the asphaltene deposition during different gas-EOR processes

Global burden of 369 diseases and injuries in 204 countries and territories, 1990–2019: a systematic analysis for the Global Burden of Disease Study 2019

Background: In an era of shifting global agendas and expanded emphasis on non-communicable diseases and injuries along with communicable diseases, sound evidence on trends by cause at the national level is essential. The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) provides a systematic scientific assessment of published, publicly available, and contributed data on incidence, prevalence, and mortality for a mutually exclusive and collectively exhaustive list of diseases and injuries. Methods: GBD estimates incidence, prevalence, mortality, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs) due to 369 diseases and injuries, for two sexes, and for 204 countries and territories. Input data were extracted from censuses, household surveys, civil registration and vital statistics, disease registries, health service use, air pollution monitors, satellite imaging, disease notifications, and other sources. Cause-specific death rates and cause fractions were calculated using the Cause of Death Ensemble model and spatiotemporal Gaussian process regression. Cause-specific deaths were adjusted to match the total all-cause deaths calculated as part of the GBD population, fertility, and mortality estimates. Deaths were multiplied by standard life expectancy at each age to calculate YLLs. A Bayesian meta-regression modelling tool, DisMod-MR 2.1, was used to ensure consistency between incidence, prevalence, remission, excess mortality, and cause-specific mortality for most causes. Prevalence estimates were multiplied by disability weights for mutually exclusive sequelae of diseases and injuries to calculate YLDs. We considered results in the context of the Socio-demographic Index (SDI), a composite indicator of income per capita, years of schooling, and fertility rate in females younger than 25 years. Uncertainty intervals (UIs) were generated for every metric using the 25th and 975th ordered 1000 draw values of the posterior distribution. Findings: Global health has steadily improved over the past 30 years as measured by age-standardised DALY rates. After taking into account population growth and ageing, the absolute number of DALYs has remained stable. Since 2010, the pace of decline in global age-standardised DALY rates has accelerated in age groups younger than 50 years compared with the 1990–2010 time period, with the greatest annualised rate of decline occurring in the 0–9-year age group. Six infectious diseases were among the top ten causes of DALYs in children younger than 10 years in 2019: lower respiratory infections (ranked second), diarrhoeal diseases (third), malaria (fifth), meningitis (sixth), whooping cough (ninth), and sexually transmitted infections (which, in this age group, is fully accounted for by congenital syphilis; ranked tenth). In adolescents aged 10–24 years, three injury causes were among the top causes of DALYs: road injuries (ranked first), self-harm (third), and interpersonal violence (fifth). Five of the causes that were in the top ten for ages 10–24 years were also in the top ten in the 25–49-year age group: road injuries (ranked first), HIV/AIDS (second), low back pain (fourth), headache disorders (fifth), and depressive disorders (sixth). In 2019, ischaemic heart disease and stroke were the top-ranked causes of DALYs in both the 50–74-year and 75-years-and-older age groups. Since 1990, there has been a marked shift towards a greater proportion of burden due to YLDs from non-communicable diseases and injuries. In 2019, there were 11 countries where non-communicable disease and injury YLDs constituted more than half of all disease burden. Decreases in age-standardised DALY rates have accelerated over the past decade in countries at the lower end of the SDI range, while improvements have started to stagnate or even reverse in countries with higher SDI. Interpretation: As disability becomes an increasingly large component of disease burden and a larger component of health expenditure, greater research and developm nt investment is needed to identify new, more effective intervention strategies. With a rapidly ageing global population, the demands on health services to deal with disabling outcomes, which increase with age, will require policy makers to anticipate these changes. The mix of universal and more geographically specific influences on health reinforces the need for regular reporting on population health in detail and by underlying cause to help decision makers to identify success stories of disease control to emulate, as well as opportunities to improve. Funding: Bill & Melinda Gates Foundation. © 2020 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 licens

Mapping local patterns of childhood overweight and wasting in low- and middle-income countries between 2000 and 2017

A double burden of malnutrition occurs when individuals, household members or communities experience both undernutrition and overweight. Here, we show geospatial estimates of overweight and wasting prevalence among children under 5 years of age in 105 low- and middle-income countries (LMICs) from 2000 to 2017 and aggregate these to policy-relevant administrative units. Wasting decreased overall across LMICs between 2000 and 2017, from 8.4% (62.3 (55.1–70.8) million) to 6.4% (58.3 (47.6–70.7) million), but is predicted to remain above the World Health Organization’s Global Nutrition Target of <5% in over half of LMICs by 2025. Prevalence of overweight increased from 5.2% (30 (22.8–38.5) million) in 2000 to 6.0% (55.5 (44.8–67.9) million) children aged under 5 years in 2017. Areas most affected by double burden of malnutrition were located in Indonesia, Thailand, southeastern China, Botswana, Cameroon and central Nigeria. Our estimates provide a new perspective to researchers, policy makers and public health agencies in their efforts to address this global childhood syndemic