bluuebunny/crossref_metadata_2025 huggingface dataset:
Financial Viability of Thermal Power Generation Plants in the Transition to Renewable Energy
Authors: Ramírez-Quintero James Duván , Martínez-Ruiz Yessenia , Manotas-Duque Diego Fernando
Published: September 2024

The energy transition will occur due to the natural decline in profitability of thermal power generation assets, and their place in the energy matrix will be taken over by renewable energies. Ensuring electric supply security, a cornerstone of the energy trilemma, is a priority for both developed and developing countries. Nations heavily reliant on hydrological resources employ thermal energy as a backup, making the exploration of financial feasibility for such projects pertinent. This study introduces an economic valuation model for a dispatchable thermal power generation plant in the Colombian market. Associated uncertainty is assessed based on revenue from market sales, bilateral contracts, and firm power remuneration – elements constituting the cash flow and converging into profitability and risk analysis. These are calculated through the Monte Carlo simulation methodology. Additionally, a sensitivity analysis is conducted, accounting for variables such as the "Reliability Payment" settlement price, capacity factor, and costs linked to coal supply. The results emphasize the need for firm power remuneration as a crucial incentive for the success of such projects. Furthermore, the criticality of dispatch level in relation to profitability is verified. Finally, the impact of coal taxes and supply negotiations on financial feasibility is assessed.
Economic Diversification, Oil Revenue and Energy Transition in Oil Dependent Countries: A Wavelet Decomposition and Panel Data Approach
Authors: Hathroubi Salem , Aloui Chaker , Hamida Hela Ben
Published: September 2024

In oil-dependent countries, the energy transition process is ongoing and it appeals substantial and necessary adjustments in terms of diversification. We attempt to provide a systematic analysis of the connectedness between energy transition, oil revenue and economic diversification using novel econometric approach, wavelet decomposition and panel data estimation. Our attention will be focused on the dynamics and causal relationships between energy transition process and economic diversification by checking the role of oil revenue. We use second generation unit roots, and a particular attention is given to cross-sectional dependence of the series. Results show that correlations between wavelet components are absent in the short term, weak in the medium term, and moderate in the long-run. Causality tests support a bidirectional causality between economic diversification and energy transition and between economic diversification and net oil revenue, in the medium and long-run scale levels. Our results would have several prominent implications for policy makers, in oil-dependent countries, when designing energy transitions and economic diversifications strategies, and gives and insightful look about the future of these countries.
The Relationship between Geopolitical Events and the Crude Oil Prices: An Application of ARDL Model
Authors: Obadi Saleh Mothana , Korcek Matej
Published: September 2024

This paper aims to explore the short-run and long-run relationship between geopolitical events and crude oil prices for the period 2000-2023. In addition to geopolitical events, we included the market factors whose data were available in the right part of the equation. To investigate long-run cointegration, this paper used quarterly data and employed the Autoregressive distributed lagged (ARDL) bounds testing approach developed by (Pesaran et al., 2001). Study findings from the ARDL bound testing approach confirm the existence of a long-run and short-run association between geopolitical events and crude oil prices. Furthermore, the findings from the ARDL model revealed that, among others, world crude oil production; OECD’s crude oil stocks, and OECD economic growth have a significant effect on the dependent variable (crude oil prices) both in the long run and short run.
The Relationship between Renewable Energy Consumption and Economic Growth: Insights from Iceland and Azerbaijan
Authors: Aliyev Shafa , Hasanov Ramil I. , Aghayeva Khanim , Gasimov Javadkhan Y. , Ahmadova Sadagat E.
Published: September 2024

Iceland leads globally in per capita green energy production, while oil-dependent Azerbaijan endeavors to transition its energy policy towards sustainable alternatives. Investigating the impacts of renewable energy consumption on the economy represents a significant contemporary scientific inquiry. The objective of this research is to empirically examine the causal relationship between GDP per capita, a key metric of economic growth, and renewable energy consumption, a fundamental aspect of the green economy. In this research, the Toda-Yamamoto causality test framework of the vector autoregressive (VAR) model was utilized to examine the causal relationship between the variables. The outcomes of this investigation reveal a significant causality between renewable energy consumption and economic growth in Iceland and Azerbaijan.
Forecasting of Electricity Consumption by Seasonal Autoregressive Integrated Moving Average Model in Assam, India
Authors: Mahanta Nibedita , Talukdar Ruma
Published: September 2024

Sustainable electricity consumption, which is about balancing economic growth, social development and environmental protection are the core principles of the Sustainable Development Goal (SDG). Accurate forecasting of electricity consumption is very important for attaining SDG - 7 which aims to ensure access to affordable, reliable, sustainable and modern energy for all. Through this paper, attempt is made to forecast monthly electricity consumption in Assam. For this purpose, one of the most widely used time series techniques, viz., Seasonal Autoregressive Integrated Moving Average (SARIMA) is applied by considering the time period April, 2013 to February, 2023 to study the seasonal influence on the electricity consumption in Assam. By applying Augmented Dickey Fuller test, it is observed that the data series becomes stationary at first order difference and the result of Canova Hansen test reveals that no seasonal differencing is required for our considering time period. SARIMA (1,1,1) (1,0,1)12 has been selected for forecasting purpose by following the results of Akaike Information Criterion. By analyzing the model statistics, residual ACF and PACF plots of the selected model, it is found that SARIMA (1,1,1) (1,0,1)12 can be effectively recommended for forecasting of monthly electricity consumption in Assam with Mean Absolute Percentage Error as 3.12%.
Copper and Lithium Industrialization by Major Producing Countries for Mining Sustainability
Authors: Coayla Edelina , Romero Violeta
Published: September 2024

This research objective is to analyze the prospects of copper and lithium industrialization for the mining sustainability of the world's major producing countries. An expo-facto design was used based on a documentary analysis, considering the world ranking of the top copper-producing countries, where Chile, Peru, China, and the Democratic Republic of Congo stand out, and regarding lithium production, Australia, Chile, China, and Argentina stand out. On a global level, the presence of South American countries with mining resources in exploration and extraction is relevant; in contrast, China, a mining country, not only extracts natural resources but has advanced in the value chain with competitive advantages and consequent economic development; for its part, the DR of Congo (Africa), has ascended in the copper extraction ranking. The motors and electrical systems of electromobility vehicles are manufactured with copper and the batteries with lithium, which contributes to the mitigation of greenhouse gas emissions and thereby to environmental sustainability. Furthermore, the correlation between copper and lithium demand for electric vehicles in a 2050 zero-emission scenario is strong. There are social conflicts, mainly over the use of water; therefore, it is necessary to implement mining policies that lead to sustainable development.
The Nonlinear Nexus of Climate Policy Uncertainty and Renewable Energy Consumption in the United States of America: A Markov-Switching Approach
Authors: Setiastuti Sekar Utami , Rajendra Mohammad Arief
Published: September 2024

We employ a Markov-Switching regression model using monthly US data from April 1987 to August 2022 to investigate the effect of climate policy uncertainty (CPU) on renewable energy consumption (REC). The main findings suggest the presence of a nonlinear relationship between CPU and REC. The baseline analysis using the CPU index reveals an adverse effect in regimes characterized by high levels of uncertainty. However, the effect is not statistically significant in a low uncertainty regime. To account for potential variations in the results, we perform a robustness analysis that considers the effect of CPU on REC, which may fluctuate based on the authorities' contextual perspectives (i.e., being in favor or against climate policy) and also the effect of CPU on REC by household. In addition, we incorporate a robustness check by utilizing the environmental policy uncertainty index developed by Noailly et al. (2022). The robustness test results confirm the results obtained from the baseline estimation.
Energy Consumption, Bank Credit and Manufacturing Industry Performance: A Panel ARDL Analysis in Western Indonesia
Authors: Amaluddin Amaluddin , Indiastuti Rina , Effendi Nury , Cupian Cupian
Published: September 2024

The energy growth nexus is still being debated due to mixed empirical findings. This study seeks to establish a relationship between energy consumption, bank credit, and the performance of the manufacturing industry. This study also aims to determine the pattern of the dynamic causal relationship between energy use, bank credit, and the performance of the manufacturing industry in 17 provinces in western Indonesia. This study used secondary data from the Central Bureau of Statistics and the Financial Services Authority. Panel data are from 17 provinces in western Indonesia, spanning from Q1 2010 to Q4 2022 (2010Q1–2022Q4). We employed the panel ARDL and causality test to explore the connection between the variables of interest. The panel ARDL confirms that energy consumption and bank credit play a crucial role in boosting the performance of the manufacturing industry in the long term. This study found strong evidence to support the long-term feedback hypothesis of the energy-output growth nexus. However, in the short term, bank credit was statistically insignificant at all confidence levels. We recommended several policies to local governments and stakeholders, prioritizing the provision of more adequate energy infrastructure and greater access for industrial businesses to utilize banking services. Advancing infrastructure and developing the utilization of new renewable energy are proposed to support sustainable economic development.
The Relationship between the Return of Energy Companies Listed on the Kazakhstan Stock Exchange and the Exchange Rate, KASE Index, and Gold Return: ARDL Bounds Value Approach
Authors: Sabenova Baltaim , Talimova Lyazat , Kanabekova Meruert , Zhakipbekova Dilyara S. , Seitova Gulnara , Maulenkulova Gulbana Erzhigitovna , Bolganbayev Artur
Published: September 2024

In a free market economy, stock market indices are influenced not only by national economic developments, but also by economic indicators such as gold, exchange rates, and oil. It is important to consider these indicators when analyzing the returns of companies traded on the stock exchange. Internal factors that impact stock market returns include the company's estimated earnings and changes in the company's financial structure. External factors include macroeconomic variables such as exchange rates, interest rates, gold prices, and Gross Domestic Product (GDP). A study analyzed the relationship between the returns of energy companies traded on KASE and the KASE index, exchange rate, and gold return during the period of 01.01.2023-01.04.2024 (328 trading days) using the ARDL Bounds Value Approach. The research findings indicate that the stock market composite index, foreign exchange, and gold returns have a long-term effect on the returns of energy companies. Particularly, the long-term effect of the stock market composite index return is found to be significant and positive for all three assets. Additionally, the effect of companies' past values has been observed as negative. According to the error correction model analysis, a key finding is that shocks to company returns will reach equilibrium in a short time, approximately one trading day. These results can provide decision support, especially for investors, when investing in energy companies.
The Impact of Socio-cultural and Environmental Deterioration Factors on Economic Sustainability in G7 Countries
Authors: Najia Noura , Taher Hanadi , Elkader Ghassan Abed
Published: September 2024

The paper provides the examination of economic sustainability based on the impact of socio-cultural factors and the environmental deterioration factors. This empirical analysis focuses particularly on G7 countries, and panel time series during the period 2000-2022 are used to test this relationship. It applies several variables to determine these impacts that are tested with a principal component analysis and generalized least square estimation. According to Hofstede (1980) which is explained the culture dimensions (masculinity, power distance, uncertainty avoidance, and indulgence); and U-shaped in Environmental Kuznets curve (EKC) which showed the relationship between environmental deterioration and income level. Socio-cultural variables are divided into three groups: “socio-development”, “Hofstede dimensions”, and “economic development”. Environmental deterioration variables are divided into two groups: “air pollution”, and “water pollution”.  The paper indicates the hypothesis that socio-cultural variables significantly impact economic sustainability; and the significant impact of environmental deterioration variables on economic sustainability. The findings shows that socio-cultural negatively impacts economic sustainability, and environmental deterioration positively affects economic sustainability. Different tests apply to determine these effects, Hausman test to determine either Fixed effect or Random effect, Heteroscedasticity test (Durbin Watson test), Persan’s CD to test the serial correlation and Jarque-Berra test to confirm the normality distribution.
Transforming Mexico’s Electric Load Infrastructure: A Quantile Transformer Network Deep Learning Approach, 2019-2020
Authors: Jiotsop-Foze Wellcome Peujio , Hernández-del-Valle Adrián , Venegas-Martínez Francisco
Published: September 2024

To transform Mexico's electric load infrastructure, accurate electric load forecasts are required that are crucial to efficiently allocate resources, maintain system stability, and manage energy. The purpose of this study is to use the Quantile Transformer Network (QTN) as a novel approach for a deep learning framework for load forecasting, emphasizing its potential and practical consequences in enhancing the accuracy of load forecasting in real-world energy systems. Moreover, it is shown that QTN efficiently captures complex patterns, temporal relationships and interconnections among factors that influence electric load. The dataset utilized consists of past records of energy consumption in the Baja California System in Mexico. It includes several factors such as electricity demand, marginal prices, temporal characteristics, temperature-related variables, seasonal patterns, and holidays. Additionally, QTN is combined with the Rainbow Technique (RT) to manage categorical variables, resulting in the creation of a unified feature called category. In this case, RT examines the connections between descriptive phrases that reflect distinct combinations of categorical factors depending on the load values. Moreover, this research shows that the common Quantile Regression (QR) outperforms QTN in capturing dependencies in sequential data. Finally, several recommendations for promoting Mexico's Electric Load Infrastructure are provided.
ESG and Environmental Performance: Multiple Mediation Models of Green Accounting and CSR Disclosure
Authors: Darsono Darsono , Ratmono Dwi , Lee Sunseok , Cahyonowati Nur , Lianawati Lianawati
Published: September 2024

Sustainability is a major theme in current academic research due to various issues such as the energy crisis, global warming, and environmental damage. This sustainability issue led to an increase in the role of environmental, social, and governance (ESG) in improving the quality of environmental management by companies. However, research on this topic is still limited with inconsistent findings. This study aims to examine the effect of ESG on environmental performance by using the mediating variables of green accounting and corporate social responsibility (CSR) disclosure. This study contributes by developing a multiple mediating model. The sample consisted of 114 firms-years observations of mining and manufacturing companies in Indonesia during the 2017-2022 period. The results show that ESG has a positive effect on the application of green accounting and CSR disclosure. Both mediation variables can improve environmental performance. In addition, ESG can also have a positive effect directly on environmental performance. These results provide empirical evidence of the importance of ESG implementation in the context of sustainability. The results of mediation testing show that CSR disclosure can act as a partial mediator so as to show support for signaling theory and the dominant role of impression management in environmental performance ranking.
Impact of Oil Price Shocks on Islamic and Conventional Bank Performance: Empirical Evidence from Saudi Arabia
Authors: Slimane Sarra Ben , Alsolamy Majed Qabil
Published: September 2024

This paper aims to investigate and compare the effect of oil price shocks on the bank performance at the aggregate level as well as the level of conventional and Islamic banks. The Autoregressive Distributed Lag (ARDL) methodology was adopted to analyze a panel of 10 Saudi banks, including 6 conventional and 4 Islamic banks, between 2006 Q1 and 2022 Q4. The results revealed that oil price shocks have a direct impact on banking performance. A rise (fall) in oil prices led to an increase (decrease) in bank performance through the channel of price-induced bank deposits. Additionally, oil price shocks have asymmetric effects, with positive oil shocks having a greater impact on bank performance than negative shocks. The findings highlighted that conventional banks tend to benefit more from oil price shocks, especially during oil price booms, as they experience higher positive impacts. However, during oil price busts, Islamic banks were more adversely impacted by oil shocks.
ESG Integration and Financial Performance: Evidence from Malaysia’s Leading Companies
Authors: Ming Kelvin Lee Yong , Vaicondam Yamunah , Mustafa Amira Mas Ayu Amir , Roslan Siti Nurul Munawwarah , Yi Shen , Chopra Komal , Khanna Pooja
Published: September 2024

This study examines the impact of environmental, social, and governance (ESG) scores on the financial performance of the leading publicly listed companies in Malaysia. Using balanced panel data from Bloomberg spanning 2015-2022, the study employs multiple regression analysis (MRA) and the generalized method of moments (GMM) to explore these relationships. The findings reveal a significant positive effect of the overall ESG score on ROA, suggesting that comprehensive ESG practices can enhance financial performance. However, individual environmental (E) and social (S) scores negatively impact ROA at a 10% significance level, indicating potential short-term costs associated with these initiatives. Corporate governance (G) scores, total assets (TA), and total debt to total assets (TDTA) ratios demonstrate a significant adverse effect on ROA. The inclusion of the global reporting initiative (GRI) standard as a control variable also adds robustness to the analysis, highlighting the role of standardized sustainability reporting in evaluating corporate performance. These insights underscore the complex interplay between ESG and companies’ financial performance in Malaysia, emphasizing the importance of considering both the benefits and potential short-term costs associated with ESG initiatives. The findings of this study are crucial for policymakers, corporate managers, and investors, offering guidance on aligning sustainability goals with financial objectives to ensure long-term value creation and risk mitigation. This research contributes to the growing body of knowledge on ESG practices in emerging markets, highlighting the critical role of sustainability in today’s global business environment.
Effect of CO2 emissions, Renewable Energy Consumption and General Government Final Consumption Spending on Moroccan Economic Growth: ARDL Approach
Authors: Fikri Yahya , Rhalma Mohamed
Published: September 2024

The empirical studies have shown that there is difference in association among depend and independent variables. Supported by framework’s Keynesian theory of EG (Economic Growth), present research aims to examine how economic growth (EG) Morocco is influenced by REC (renewable energy consumption), general government spending, and CO2 emissions. This research used the method of least squares ordinary assess the short- and long-term relationships between the model's variables, using an autoregressive approach for stationarity and distributed degradation. For the years 1993 to 2020, the research has gathered yearly data from WDI. According that empirical results, none independent variable were stationary at the first difference, but dependent variable was. A long-term association between the independent and dependent variables was shown by the model simulation utilizing the bound test. The White test revealed that there was no evidence of heteroscedasticity in the model residuals. The residuals have a normal distribution, as determined by the Shapiro-Wilk test, and the model exhibits stability throughout the time span with no structural fractures. The study's conclusions suggest that while the use of renewable energy sources and carbon dioxide emissions both exhibit notable positive trends, government spending on public goods has a substantial adverse association with economic growth.
Stock Market Development and Environmental Sustainability in Saudi Arabia: Asymmetry Analysis
Authors: Adow Anass Hamadelneel
Published: September 2024

Stock Market Development (SMD) can have positive or negative environmental effects by providing the capital to clean or dirty production processes, respectively. The present study investigates the effect of SMD on CO2 emissions in Saudi Arabia from 1985 to 2022 by conducting symmetrical and asymmetrical analyses. The results validate the environmental Kuznets curve in both symmetrical and asymmetrical analyses. The turning point of the curve is found at 61500 SR and 49944 of income per capita in symmetrical and asymmetrical analyses, respectively, in the long run. The turning points are found at 65895 SR and 54979 SR in the symmetrical and asymmetrical models, respectively, in the short run. All points are within the range of sample period’s income. Thus, Saudi economic growth has no environmental problems. Moreover, SMD and increasing SMD help reduce CO2 emissions in the long run with elasticity parameters 0.8548 and 0.9854 in symmetrical and asymmetrical models, respectively. Thus, SMD should further be focused to have pleasant environmental effects in Saudi Arabia.
The Impact of Crude Oil Price Fluctuation on Revenue Generation in the Oil Dependent Economy: Nigeria
Authors: Kutu Augustine Adebayo , Ohonba Abieyuwa
Published: September 2024

This study explores the dynamic relationship between crude oil price volatility and revenue generation in Nigeria over a 41-year period from 1981 to 2021. It encompasses an analysis of key variables, including total revenue (REV), oil price (OPV), oil revenue (ORV), non-oil revenue (NRV), and exchange rate (EXCHR). The study employs the Auto Regressive Distributed Lags (ARDL) model to examine the long-term and short-term impacts of oil price volatility on revenue generation. This study reveals that crude oil price volatility (OPV) failed to exert strong impact on total revenue (REV) in Nigeria in the distance period. Oil revenue (ORV) exhibits a strong and positive influence on total revenue, highlighting its pivotal role in revenue generation. Non-oil revenue (NRV) also significantly contributes to total revenue, emphasizing the importance of diversifying revenue sources. Exchange rate (EXCHR) fluctuations do not significantly predict changes in total revenue. Based on the findings, policy recommendations include diversifying revenue sources, enhancing non-oil revenue collection, effective oil revenue management, promoting economic diversification, strengthening tax infrastructure, and adopting prudent budgeting practices.
Towards a Sustainable Future: Examining the Symmetric and Asymmetric Effect of Unstable Macroeconomic Factors on Initial Public Offerings Variability
Authors: Mehmood Waqas , Gharaibeh Fakir Al , Rizvi Ifham , Mehmood Waqar
Published: September 2024

The research seeks to explore the symmetric and asymmetric effects of renewable energy, technological innovation, and ecological footprint on the variability of initial public offerings in the unique institutional setting of the Pakistani IPO market. The study used yearly data on the Pakistani IPO market and the macroeconomic variables from January 1992 to December 2020. Further, the study employed the linear and Non-Linear ARDL to investigate the symmetric and asymmetric nexus among variables. For that purpose, the stationarity of the variables was predetermined using Augmented Dicker Fuller (ADF) and Phillips Perron (PP) unit root tests. Additionally, the F-bound test verifies that IPO issuance and macroeconomic drivers are co-integrated. The findings show a symmetric and asymmetric relationship between IPO variability and macroeconomic variables under study. Renewable energy and technological innovation have statistically positive effects on IPO variability. On the contrary, the ecological footprint has a significantly negative impact on IPO variability. The weak condition of the Pakistani IPO market could be attributed to the slow adoption of technological innovation, the transition to renewable energy, and a high ecological footprint that attracts stringent regulatory and environmental compliance costs of going public.
Impact of Foreign Direct Investment on Renewable Energy Consumption: Findings from Bootstrap ARDL with a Fourier Function
Authors: Telatar Osman Murat , Adimli Tugce
Published: September 2024

Renewable energy consumption (REC) is viewed to be a core component for delivering sustainable economic growth. It is broadly acknowledged that REC can significantly contribute to lessening the burden of carbon emissions on the environment and fostering economic progress. Although foreign direct investments (FDI) are perceived as a key catalyst of REC growth, in some cases they can cause negative effects on REC. While there are many studies in the literature exploring the effects of FDI on variables such as economic growth, employment and foreign exchange deficits, the amount of studies examining the effect of the said variable on REC is very limited. The existing study attempts to fill this knowledge gap concerning the relationship between FDI and REC in Türkiye. This research investigates the long-run impact of FDI on RECs in Türkiye for the period 1973-2022 using the bootstrap Fourier ARDL technique. Empirical analysis reveals that FDI affects REC negatively, while GDP has no effect. The study's conclusions confirm the Pollution Haven Hypothesis (PHVH) in Türkiye, suggesting that the country has emerged as a desirable destination for businesses seeking to relocate their operations and evade the strict environmental regulations in their home countries.
Testing the Environmental Kuznets Curve Hypothesis within the Context of Industrial Development through NARDL Model: The Case of France
Authors: Artekin Ayşe Özge
Published: September 2024

Energy is one of the necessary and vital factors for the economic development of countries and the increase in living standards. The limited availability of conventional energy resources, in parallel with the rapid increase in energy consumption due to industrialization activities and technological developments, has encouraged countries to change their energy production policies and use alternative energy sources. For this purpose, in the study, the relationship and direction of the relationship between industrial production, CO2 emissions, energy use and economic growth in France are examined with the carrying out of the ADF, PP, KPSS unit root and the NARDL test for the period 1990–2023. The analysis findings reveal that the variables are cointegrated in the long-run and a 1% unit raise in energy consumption would trigger CO2 emissions by 0.46%. The increase in energy consumption in the long term affects both negatively and positively in the long term. While a 1% increase in energy consumption reduces carbon emissions by 0.48%, a 1% decrease causes a 0.35 decrease in carbon emissions. The positive increase in economic growth and the negative increase in energy consumption trigger environmental pollution by causing an increase in carbon dioxide emissions. There is interdependence between economic activities and environmental pollution. Policy makers need to adopt a strategic approach in solving the rapid industrialization phenomenon and the accompanying magnitude of energy consumption, the pressure on natural resources and the environmental pollution problems resulting from them. In this respect, it is an inevitable necessity for countries to continue multilateral negotiations in which the public sector, business world, academia and non-governmental organizations will take part in solving environmental problems.
Analisis Kemampuan Berpikir Kreatif Siswa Pada Soal Open Ended Materi Pecahan Kelas VII SMP Negeri 16 Palembang
Authors: Yuliani Refi Elfira , Kusumawati Nyimas Inda , Nurliah Nurliah
Published: September 2024

This study aims to determine students' creative thinking skills in solving open ended mathematics questions in class VII SMP Negeri 16 Palembang. This research approach uses a descriptive research type with a qualitative research type. The population in this study were all students of class VII SMP Negeri 16 Palembang with the sample in this study being students of class VII.8 who carried out learning from the network or online, namely VI.B as many as 23 students. The data collection technique in this study was in the form of a test which served as the main data in this study. Data analysis aims to determine students' creative thinking abilities in solving open ended questions for class VII SMP Negeri 16 Palembang on fractions. After conducting research, the results of this study were obtained with the results of differences in each indicator of fluency, flexibility, and elaboration. Students' thinking ability on the fluency indicator has a score of 53.21, students' thinking ability on the flexibility indicator has a value of 56.34, and students' thinking ability on the elaboration indicator has a value of 91.13. Based on the results of the study, it was obtained that the ability to think creatively was in the sufficient category of 69.56%, the less category was 17.39%, and the category was not 13.04%.
Kesalahan Siswa SMP Kelas VII dalam Menyelesaikan Soal Operasi Hitung Bilangan Pecahan
Authors: Heru Heru , AS Rusdy , Pajrin Vera
Published: September 2024

This study aims to discover the types of fraction arithmetic operations and the factors that cause students to make mistakes in solving fractional arithmetic operations questions. This type of research is descriptive-qualitative research. The population in this study were class VII students of South Indralaya 1 Middle School, South Indralaya 2 Middle School, and South Indralaya 3 Public Middle School, with a total sample of 150 VII-grade students. The data collection technique was in the form of giving tests with as many as 12 questions as experts and interviews had validated. Data analysis used is data reduction, data presentation, and conclusions. The results showed that the most dominant type of fraction arithmetic operations in which students completing fraction arithmetic operations made mistakes was type 10 (a/b:c/d) 82 students, type 6 (c-a/b) 78 students, type 3 (c+a/b) 77 students, type 11 (c:a/b) 76 students, and type 12 (a/b:c) 71 students.
Hasil Belajar Matematika pada Pembelajaran Kooperatif Two Stay Two Stray
Authors: Syaifudin Syaifudin , Muslimin Muslimin , Nery Rieno Septra , Setiawan Dicky
Published: September 2024

Problems faced about the low student learning outcomes in algebraic form material. The reason for the low student learning outcomes is the lack of optimal action and learning models used in the learning process, thus making students make a lot of concept errors in algebraic form material. To be able to overcome the problem of learning outcomes, it is necessary to do cooperative learning type Two Stay Two Stray. The research method uses a True Experimental Design research design in the form of a Posttest Only Control Design. From the calculation of learning outcomes obtained by class VIIA by using Two Stay Two Stray cooperative learning obtained an average of  and a standard deviation of , while class VIIC without using Two Stay Two Stray cooperative learning obtained an average of with the standard deviation . Based on the hypothesis test obtained and with  and a significant level ? = 0.05. Because means that Ha is accepted. From testing Ha's hypothesis which states that "There is an influence of Two Stay Two Stray type of cooperative learning on the learning outcomes of Grade VII Middle School students on algebraic form material", the truth is accepted.
Pengaruh Pembelajaran Matematika Menggunakan Model Problem Based Instruction Terhadap Hasil Belajar Segitiga
Authors: Muslimin Muslimin , Yuliani Refi Elfira , Nurhayati Nurhayati
Published: September 2024

The problem in this study is "is there an effect of learning mathematics through the Problem-Based Instruction (PBI) model on triangle material on the learning outcomes of VII grade students of MTs Negeri 1 Palembang?". The purpose of this research is to find out: (1) the effect of the problem-based instruction learning model and the conventional model in terms of learning outcomes of seventh-grade students in MTs Negeri 1 Palembang; (2) whether there is a difference in the effect between learning model with problem-based instruction and conventional teaching model in terms of learning outcomes of seventh-grade students in MTs Negeri 1 Palembang. This research is a type of experimental research with a population of all seventh-grade students of MTs Negeri 1 Palembang. The sample consisted of two classes taken by random sampling technique. The triangle learning outcomes data obtained were analyzed using a one-sample t-test and an independent sample t-test. The results showed: (1) problem-based instruction and conventional learning models each have an effect seen from the learning outcomes of triangles of students in class VII MTs Negeri 1 Palembang. Based on statistical analysis, it was found that "learning mathematics through learning the Problem-based instructional model on the learning outcomes of triangles in class VII MTs Negeri 1 Palembang" was accepted.
Kemampuan Matematika Siswa SMP di Provinsi Sumatera Selatan
Authors: Supriadi Agus , Hirza Bonita , Anggraini Yuli
Published: September 2024

The mathematical abilities possessed by each student are different even though they are at the same age and at the same level of education. In order to find out students' mathematical abilities can be known based on the test results on the questions provided and given an assessment by the teacher. This study aims to determine the math abilities of junior high school students in South Sumatra Province. This research uses quantitative research methods. The sample in this study were public and private junior high schools in South Sumatra with a total of 416 students. From the results of the research conducted by researchers, it was obtained the mathematical ability scores of junior high school students in South Sumatra Province using multiple choice questions for the 2018/2019 Mathematics National Examination. A total of 416 students as the research sample, obtained a final score with a very good category of 0.4%, a good category of 51.6%, an adequate category of 40% and a poor category of 8%. The largest percentage or average final score of junior high school students in South Sumatra Province with a sample of 416 students and the 2018/2019 Mathematics National Examination questions with a total of 40 items in the Good category
Meningkatkan Hasil Belajar Siswa Pada Materi Perbandingan Trigonometri Pada Segitiga Siku-Siku Menggunakan Media Edukatif Pada Kurikulum Merdeka
Authors: Susanti Susanti , Nurdayani Asri , Raini Yeni , Paranita Suzana
Published: September 2024

Trigonometry material is very important in mathematics learning because it become one aspects that needs to be trained and developed. The activity using Macromedia Flash can help students develop reasoning, make conjectures and tests ideas in solving problems. Reality, most of students face difficulties of comparison of  right triangle Trigonometry as well as. Besides that ,learning process rarely give students opportunity to build their knowledge as suitable as their own cognitive development. The aim of this reserch is action research can help students to understand of comparison of right triangle Trigonometry with Macromedia Flash  giving students opportunity to build their own knowledge in high school.  The research method which used classroom action research and the research subjects were  of X class of SMA Plus Negeri 17 Palembang, South Sumatera. The results of the research obtained learning method can help students to understand right triangle Trigonometry. Start with combination material of Macromedia Flash as starting point, independently and/or interacting with other learning sources such as books, peers, class discussions and teacher reinforcement, students  find out  comparison of right triangle Trigonometry. The learning results show that by using  Macromedia Flash material of comparison of right triangle Trigonometry is easy for students to  understand and comprehend
Analysis of Student Ability Solving Hots Problems Material Exponent Equation Reviewed From's Beginning Ability
Authors: Nadifah Lailatul , Shodikin Ali
Published: September 2024

This study aims to describe the ability of high school students in solving HOTS-type questions in terms of initial abilities. The research method used in this research is descriptive qualitative. The subjects of this study were three students of class X consisting of 1 high-ability student, 1 medium-ability student, and 1 low-ability student. Collecting data or information in this study using written tests and interviews. The written test was conducted twice, namely the initial ability test and the problem-solving test. The instrument used was a validated test and interview guide. The result of this study is that students who have high abilities turn out to have similarities with students who have moderate abilities, which are only able to solve problem number 1 with an analytical level (C4) even though they use different methods of solving. While students who have low abilities are not able to respond to the three questions correctly. In general, the ability of SMA Negeri 1 Baureno students in solving HOTS category questions is still below average. This is because they are not used to working on HOTS category questions at school. So far, teachers only give ordinary questions found in textbooks or worksheets.
Am Horizont
Authors: Laumer Angelika
Published: September 2024

Wieso ist Wissen zu NS-Zwangsarbeit in einer ländlichen Gegend, wo Nachkommen ehemaliger NS-Zwangsarbeiter_innen leben, gleichzeitig an- und abwesend? Basierend auf Interviews mit ihnen sowie mit Nachkommen von Zwangsarbeits-Profiteur_innen wird gezeigt, wie ineinander verflochtenes gesellschaftliches Erinnern und Vergessen vonstattengehen. Dafür modifiziert die Autorin Konzepte von kollektivem Gedächtnis, um diese für die ländliche Gesellschaft fruchtbar zu machen. Der Fokus liegt dabei auf Mündlichkeit, Alltäglichkeit und sozialer Struktur. Damit liefert das Buch einen Beitrag zu den Memory Studies.
Piyasa Değeri ve Piotroski F Skor İlişkisi: Panel Veri Analizi
Authors: Uzun Sumeyra , Saldanlı Arif , Sırma İbrahim
Published: September 2024

Bir şirketin piyasa değerindeki artış ve azalış çok sayıda faktörden etkilenir. Halka açık şirketlerin piyasa değerleri ve buna bağlı olarak getirilerinin tahmini finans literatüründe üzerinde çalışılan önemli bir konulardandır. Çünkü şirketlerin değerini doğru bir şekilde belirleyebilmek yatırımcıların kararlarını etkileyecektir. Joseph Piotroski tarafından finans literatürüne kazandırılan F Skoru (0-9 arası) uygulaması zamanla yatırımcılar tarafından pay ve şirket değerlemesi konusunda önemli bir gösterge olarak kabul edilmiştir. Bu çalışmada 2014-2020 yılları arasında Borsa İstanbul Pay Piyasası’nda işlem göre 298 şirketlerin 27 çeyrek dönemlik piyasa değerleri ile F-Skorları arasındaki ilişki gözlemlenmiştir. Çalışma sonucunda F skordaki 1 birimlik artış piyasa değerini yaklaşık %6,14 birim arttırdığı sonucuna ulaşılmıştır. Bu sonuca göre Piotroski F-Skor değerlerinin yatırımcıların pay senedi yatırım kararlarında dikkate alabilecek bir temel analiz göstergesi olduğu sonucuna ulaşılmıştır
Gottfried von Straßburg’un Tristan Adlı Eserinde Yer Alan ›Minnetrank‹ Kavramının İşlevi Üzerine
Authors: Tekin Habib
Published: September 2024

Söz konusu çalışmada Gottfried von Straßburg'un eski Alman başyapıtlarından biri olan Tristan'daki iki baş karakter Tristan ve Isolde arasındaki aşkın kökeni incelenecektir. Seçilen eser, 'Minne'nin tanımı, gelişimi ve işlevi dönemin diğer eserlerinden farklı olduğu için orta çağ eserleri arasında özel bir anlam taşımaktadır. İşin dönüm noktası özellikle 'Minnetrank' sahnesi ile gündeme gelmiştir. Bu sebeple öncelikle 'Minnetrank'ın eserdeki işlevi ve konumu ele alınacaktır.
Diğer iki bölümden oluşan çalışmanın birinci bölümünde 'Minnetrank'ın Gottfried von Straßburg'un eserindeki konumu, tanımı ve iksir sahnesine yer verilerek farklı bir bakış açısı sunulacaktır. Daha sonra iksirin çeşitli işlevleri ele alınacaktır. İkinci bölümde Minne'nin iksir öncesi durumu metinden seçilen bölümlerle analiz edilecektir.
Bu nedenle, bu çalışmanın amacı, Minnetrank iksir sahnesinden önce Tristan ve Isolde arasında sözde 'Minne'in başlayıp başlamadığını ve başladıysa ne zaman ve nasıl başladığını göstermektir. Sonuç olarak 'Minnetrank'ın konumu, tanımı ve iksiri, iksirin çeşitli işlevleri okuyucuya gösterilecektir.
Temporary Visual Hallucinations in a 31-year-old Female Patient Post Falcotentorial Meningioma Resection with No History of Psychosis: A Case Report
Authors: Sipayung Sebastian , Janitra Raka , Hassan Roslan , Satyanegara
Published: September 2024

Introduction: Falcotentorial meningiomas are rare, comprising 1%–2% of all intracranial meningiomas, arising at the junction of the falx cerebri and tentorium. These tumors may compress the quadrigeminal plate and/or splenium, leading to peduncular hallucinosis—vivid, colorful visual hallucinations of people and animals, which can persist even after tumor removal.
Case Description: A 31-year-old woman with no psychosis history presented with a bilateral visual field deficit and left extremity weakness. Brain MR imaging revealed a lobulated mass attached to the right cerebellar tentorium, posterior falx cerebri, and adjacent venous sinuses. Visual field analysis showed homonym superior quadranopsia. Following craniotomy and tumor removal, histology confirmed a mixed-type meningioma. Post-surgery, the patient experienced vivid visual hallucinations that resolved in two weeks, but bilateral visual field deficits remained. A post-op CT showed reduced structural compression around the lesion with slight narrowing of the quadrigeminal cistern.
Discussion : Visual hallucinations in falcotentorial meningioma patients, often as peduncular hallucinosis, occur due to compression of the quadrigeminal plate and/or splenium and may persist post-surgery if lesions are present in the cerebral peduncles or nearby midbrain areas.
Conclusion: The patient's temporary hallucinations may have resulted from post-resection tissue edema causing quadrigeminal cistern narrowing or indicate lesions in the cerebral peduncles or adjacent midbrain regions.
Transsphenoidal Approach for Sellar Region Tumor : A Case Series
Authors: Ibrahim Sabri , Savitri Annisa Aulia , Davi Diqqi
Published: September 2024

Introduction: Transsphenoidal approaches to the sellar region, with endoscopic or microscopic techniques, are regularly used to treat a diverse collection of pathologies.
Case Description: Three patients with presenting symptoms visual disturbance and headache were evaluated with MRI that showes sellar region masses. All patients were undergo transphenoid tumor removal. Post operation evaluation show improvement in visual disturbance and headache with no adverse event after procedure.
Discussion : Transsphenoidal endoscopic surgery (TSS) for functional pituitary adenomas yields better endocrinologic results for noninvasive macroadenomas. However, the rate of postoperative CSF leakage was greater with the endoscopic method. In patients with pituitary adenomas, younger age, dense visual field defect, and the preoperative absence of central or bilateral visual field abnormalities were predictive factors of visual field recovery following transsphenoidal approach-tumor excision. Overall survival rates are generally high, ranging from 91% to 98%.
Conclusion: Transphenoid approach was a good surgical method for sellar region masses and show good outcomes after operation.
Keyword : Sellar region masses; Surgical; Transsphenoid approach
Mortality of Guillain Barre Syndrome and Myasthenic Crisis in Haji Adam Malik Central General Hospital Medan January 2021- December 2022
Authors: Surbakti Stefanie Meitha Putri Sejahtera , Fitri Aida
Published: September 2024

Introduction: Neuromuscular disorders are disorders of the neuro system that impact the muscular system. Among them are Guillain-Barré Syndrome and Myasthenic Crisis. Guillain-Barré syndrome is an autoimmune disorder of the nervous system that is polyradiculoneuropathic, characterized by weakness that radiates from the legs to the arms, torso, and face. Myasthenic crisis is a state of acute respiratory failure due to the exacerbation of Myasthenia Gravis. These two diseases are the most common types of neurodiseases found in hospital ICU patients.
Objective: Determining the mortality rate of Guillain-Barré Syndrome and Myasthenic Crisis at Haji Adam Malik Central General Hospital Medan January 2021-December 2022.
Methods : This study was a descriptive study with data obtained from medical records. The subjects were inpatients and outpatients with Guillain Barré Syndrome and Myasthenia Crisis, with as many as 129 patients. The subjects were selected by purposive sampling and met the inclusion and exclusion criteria.
Results: A total of 40 Guillain-Barré Syndrome patients were studied, and 6 of them died. The majority were patients aged 36-50 years, and the male and female sexes were equally significant. A total of 89 patients with Myasthenic Crisis were studied, and 1 of them died, namely patients with the age category of 36-50 years and female.
Conclusion: Guillain-Barré Syndrome mortality was 15%, and Myasthenic Crisis was 1.12% at Haji Adam Malik Center General Hospital Medan January 2021-December 2022.
Keyword : Guillain-Barré Syndrome, Mortality, Myasthenic Crisis