Method Of Moments Analysis Research Articles

From instantaneous schedulability to worst case schedulability: a significant moment approach

ABSTRACT The method of significant moment analysis has been used to derive instantaneous schedulability tests for real-time tasks. However, the instantaneous schedulability can only be checked within a finite time window. On the other hand, worst-case schedulability guarantees schedulability of tasks for infinite time. This paper derives the classical worst-case schedulability conditions for pre-emptive periodic tasks starting from instantaneous schedulability, hence unifying the two notions of schedulability. The results provide a rigorous justification for the critical time instants being the worst case for scheduling pre-emptive periodic tasks. The paper also shows that the critical time instant is not the only worst-case moments.

Legal Constraints or Aggregate Individual Characteristics? Examining Factors of State R&D Intensity and Spending in the United States

ABSTRACTThis study empirically examines the impacts of legal constraints and aggregate individual characteristics on the funding and expenditure related to states' research and development (R&D). A system generalized method of moments (GMM) analysis is performed over a 20‐year period (2000–2019). The budgetary institutions, including rainy‐day funds, TELs, and debt limitations, significantly affect states' overall innovative capacity and R&D spending. They can hinder improvements in states' innovative capacity and R&D expenditure. On the other hand, states can circumvent these institutions and increase their R&D intensity and spending. States' development and human capacity foster their innovative capacity and R&D spending. Catholic work ethic is also crucial for enhancing state governments' innovative capacity and R&D expenditure. Legislative term limits reduce states' R&D intensity and expenditure. Meanwhile, economic downturns may motivate additional spending on R&D activities to promote states' innovative capacity and R&D spending. Fiscal burdens can prevent states from investing in R&D.

Navigating carbon neutrality pathway beyond energy and economic agents: the influence of media liberty across the OECD countries

Abstract Press freedom is a fundamental aspect of democratic societies, playing a critical role in shaping public discourse, fostering transparency, and holding institutions accountable. Furthermore, its impact extends beyond political and social realms to encompass environmental sustainability, particularly in Organisation for Economic Co-operation and Development (OECD) countries. While extensive research has been conducted on the economic, social, and institutional factors that influence environmental outcomes, the role of press freedom in shaping ecological footprint remains underexplored. However, this study aims to address this gap by examining the relationship between press freedom and ecological footprint across 36 OECD countries from 2013 to 2022. Utilizing a system generalized method of moments (GMM) analysis and controlling for economic growth, trade openness, and energy consumption, this research reveals significant findings. Specifically, it demonstrates that press freedom serves as a catalyst for reducing ecological footprint, presenting OECD countries with a unique opportunity for environmental gains and potentially achieving carbon neutrality. In contrast, we find indicators such as economic growth, energy consumption, and trade openness have negative impact on environmental quality. Overall, this study underscores the importance of promoting press freedom as a key strategy for advancing environmental sustainability and calls for concerted efforts to harness its potential for mitigating ecological footprint in OECD countries and beyond.

Effect of Industrialization on Taxes from Income, Profit and Capital Gains Among Sub-Sahara African Countries

Tax revenue is a crucial financial resource for governments worldwide. Developed nations often secure ample tax revenue through robust industrial performance. In contrast, developing economies struggle with various challenges that hinder tax revenue from sources such as income, profit, and capital gains, largely due to high unemployment and inadequate industrialization. This study employed an ex-post facto research design and analyzed panel data from 38 countries over 21 years (2001–2021), sourced from the World Bank Group Database. The System Generalized Method of Moments (SGMM) analysis revealed that industrial performance significantly impacts tax revenue from income, profit, and capital gains in sub-Saharan African countries. The study concluded that advancing industrialization in sub-Saharan Africa is essential for maximizing tax revenue from these sources. It is recommended that governments in the region focus on accelerating industrial growth as a strategy to achieve sustainable tax revenue generation.

Moment analysis by affinity capillary electrophoresis for study of reaction kinetics between phenylboronic acid and monoccharides

Abstract A moment analysis method was applied to study intermolecular interactions between phenylboronic acid and monosaccharides. The values of first absolute and second central moments of elution peaks, measured by affinity capillary electrophoresis (ACE), were analyzed on the basis of the moment theory to determine those of association equilibrium constant and association and dissociation rate constants of the intermolecular interactions. Their values were fairly in agreement with results reported in previous studies. The moment analysis method using ACE has some advantages in comparison with conventional spectroscopic methods. For example, neither immobilization nor fluorescence labelling of solute and/or ligand molecules is required when ACE data are measured. Because the principles of the method are different from those of ordinary spectroscopic ones, this method contributes to the kinetic study of intermolecular interactions from various perspectives. A comparison was made between intrinsic characteristics of the moment analysis method and those of two historical ones developed by the Whitesides and Krylov groups. Some restrictive features of the moment analysis method were also explained. It is concluded that the moment analysis method using ACE is effective as one experimental method for the analysis of intermolecular interactions.

Moment analysis method for the determination of permeation kinetics of coumarin at lipid bilayers of liposomes by using capillary electrophoresis.

A method was developed for studying mass transfer kinetics at lipid bilayers of liposomes. Elution peaks of coumarin were measured by liposome electrokinetic chromatography (LEKC). Four types of phospholipids having different alkyl chains were used for preparing liposomes, which were used as pseudo-stationary phases in LEKC systems. Rate constants of permeation across lipid bilayers of liposomes or of adsorption at lipid membranes were determined by analyzing the first absolute and second central moments of the elution peaks measured by LEKC. The rate constants of permeation or adsorption tend to decrease with an increase in the carbon number of the alkyl chains of phospholipids. It was demonstrated that the moment analysis of elution peak profiles measured by LEKC is effective for determining lipid membrane permeability or adsorption kinetics. Compared with other conventional techniques, the method has some advantages for studying mass transfer kinetics at lipid bilayers. Solute permeation across or solute adsorption at real lipid bilayers of liposomes is analyzed. The principle of the method is the analysis of separation behavior in LEKC, which is different from that of the other ones. It is expected that the method contributes to the kinetic study of mass transfer at lipid bilayers from various perspectives.

The contribution of macroeconomic indicators to the attainment of economic development objectives in some western ASIAN countries

This study looks at how macroeconomic variables affect poverty, unemployment, and economic growth in seven Western Asian nations. We used 18 years of data (2003-2020) using a generalized moment analysis method, although experience has varied significantly in different countries as well as between different regions. The development and effective implementation of policies to accelerate employment growth are essential to success on a continent that still has an exceptionally high rate of poverty. These policies will allow us to address the persistent problems of unemployment and poverty. In developing an appropriate policy, countries need to take into account the universal acceleration of trends towards closer integration of the world economy and the rapid pace of liberalization as national economies move increasingly towards a market economy. According to our findings, poverty, unemployment, and economic growth are all significantly impacted by sustainable development indices. During the study period, investment and the activity rate were two of the primary factors influencing economic growth. Western Asian countries should improve the quality of their institutions and their capacity to adapt and acquire new skills. Trade and globalization should not be considered in isolation. Additional policies are needed to reinforce its impact on economic growth.

ICT diffusion, E-governance, and sustainability in the digital era

This study analyses the impact of information and communications technology (ICT) diffusion and e-governance on sustainability in 148 Belt and Road Initiative (BRI) partner countries. It considers control variables such as institutional quality, urbanization, research and development (R&D), and the COVID-19 effect as dummy variables. Two step-generalised method of moments analysis of a panel dataset of 148 BRI partner countries from 2013 to 2021 reveals that ICT diffusion and e-governance benefit sustainability, with R&D and institutional quality also making positive contributions, while urbanization and the pandemic negatively impact sustainability. The findings were validated through D-K regression checks and support the technology spill-over effect, innovation, triple bottom line, endogenous growth, and stakeholder theories. They highlight the significance of investing in ICT infrastructure and digital literacy programs, improving institutional reforms and governance practices, putting sustainable urban planning into practice, and supporting R&D projects to advance sustainability in BRI partner nations. This study clarifies the potential problems brought forth by the pandemic and makes suggestions for reducing its negative effects on sustainability. It contributes to evidence-based decision-making, guiding sustainable practices in BRI partner nations.

Income and consumption inequality trends: a comparative analysis between paid employees and the self-employed

This paper aims to analyze trends in income and consumption inequality for paid and self-employed households and examine to what extent changes in aggregate consumption and income inequality can be explained by changes in their permanent and transitory components over time using data from the Italian Survey of Household Wealth (SHIW) covering the period 1989-2016. The results obtained from the Generalized Method of Moments (GMM) analysis reveal differences in consumption and income inequality, as well as their permanent and transitory components, between self-employed and payroll households. In particular, self-employed households experience higher levels of both income and consumption inequality, the increase in total income and consumption inequality is mainly driven by an increase in its transitory component. Furthermore, findings from other descriptive measures of inequality, such as the Gini coefficient, the variance of the log, 90th/10th, and 50th/10th percentile ratios, support the notion that income inequality is higher than consumption inequality across all groups, with self-employed households exhibiting a more pronounced difference.

The impact of national savings on economic development: a focused study on the ten poorest countries in Sub-Saharan Africa

The purpose of this study is to examine the impact of national savings on economic development, as measured by the Human Development Index (HDI), Inequality-adjusted HDI (iHDI), and Multidimensional Poverty Index (MPI), in ten of the poorest countries in Sub-Saharan Africa. The study employs a sequential Generalized Method of Moments (GMM) analysis to address potential endogeneity issues and account for the dynamic nature of the relationships, covering the period from 2009 to 2019. The findings reveal a complex relationship between national savings and the selected development indicators. While national savings exhibit positive impacts on HDI and iHDI, the results are not consistently statistically significant across all the sequential models. However, the analysis suggests that national savings have a positive influence on reducing multidimensional poverty, as measured by MPI, particularly when effectively channeled into productive investments. The study also highlights the significant positive impact of government expenditure and foreign direct investment (FDI) on human development, underscoring the importance of strategic public investments and foreign capital. The results suggest that while national savings are crucial, their effective utilization is essential for enhancing human development indices. Strategic investments in public goods and foreign capital are also important. The mixed effects of inflation and official development assistance (ODA) emphasize the need for stable economic policies and effective utilization of foreign aid. The modest positive impact of institutional quality suggests that improvements in governance and institutional frameworks can contribute to human development. The findings underscore the need for policies promoting financial inclusion, efficient public expenditure, foreign direct investment, and stable macroeconomic conditions to leverage national savings for economic development. The study’s findings provide valuable insights for policymakers in Sub-Saharan Africa, highlighting the need for comprehensive strategies that leverage national savings, public expenditure, and foreign investment to drive sustainable economic development and poverty reduction.

Moment analysis method for determination of rate constants of solute permeation across interface of spherical molecular aggregates by means of high-performance liquid chromatography

A moment analysis method was developed for the study of solute permeation at the interface of spherical molecular aggregates. At first, new moment equations were developed for determining the partition equilibrium constant (Kp) and permeation rate constants (kin and kout) of solutes from the first absolute (μ1A) and second central (μ2C) moments of elution peaks measured by using high-performance liquid chromatography (HPLC). Then, the method was applied to the analysis of mass transfer phenomena of three solutes, i.e., hydroquinone, resorcinol, and catechol, at the interface of sodium dodecylsulfate (SDS) micelles. HPLC data were measured by using an ODS column and an aqueous phosphate buffer solution (pH = 7.0) as the mobile phase solvent. Pulse response experiments were conducted while changing SDS concentration (5 - 20 mmol dm−3) in the mobile phase under the conditions that the surface of ODS stationary phase was dynamically coated by SDS monomers. In order to demonstrate the effectiveness of the moment analysis method using HPLC, the values of Kp, kin, and kout were determined for the three solutes as 35 - 69, 2.4 × 10−8 - 1.4 × 10−6 m s−1, and 7.0 × 10−10 - 2.1 × 10−8 m s−1, respectively. Their values increase with an increase in the hydrophobicity of the solutes. The method has some advantages for the study of interfacial solute permeation of molecular aggregates. For example, neither immobilization nor chemical modification of both solute molecules and molecular aggregates is required when elution peaks are measured by using HPLC. Interfacial solute permeation takes place in the mobile phase without any chemical reaction or physical action on molecular aggregates. The values of Kp, kin, and kout were analytically determined from those of μ1A and μ2C by using the moment equations. The results of this study must contribute to the dissemination of an opportunity for studying the interfacial solute permeation of molecular aggregates to many researchers because of extremely high versatility of HPLC.

1D1-2 Validation of a Joint Moment Analysis Method measured by Markerless Motion Capture

1D1-2 Validation of a Joint Moment Analysis Method measured by Markerless Motion Capture

The importance of emotional intelligence in reducing work fatigue in playgroup and kindergarten teachers

This This study aimed to examine the relationship between the level of emotional intelligence and the level of work fatigue in playgroup and kindergarten teachers. The research participants were 100 teachers from various educational institutions at playgroup and kindergarten level in the Special Region of Yogyakarta. The instruments used included the emotional intelligence scale and work fatigue scale. The data collection method was through a scale distributed to participants which was then analyzed by using the Karl-Pearson product moment analysis method. The results of data analysis showed that there was a significant negative correlation between the level of emotional intelligence and the level of work fatigue in play group and kindergarten teachers (r = -0.672, p < 0.001). This showed that the higher the level of emotional intelligence, the lower the level of work fatigue felt by teachers. Vice versa, the lower the level of emotional intelligence, the higher the level of work fatigue felt by the teacher. The emotional intelligence variable contributed 45.1% to work fatigue, while the remaining 54.9% was influenced by other factors. This study provided important implications for future researchers as well as administrators of educational institutions and teachers to improve the understanding and development of emotional intelligence as a strategy to reduce the level of work fatigue in teachers at the play group and kindergarten levels. In an effort to improve welfare and the quality of teaching, fostering emotional intelligence needed to be integrated into training and professional development programs for teachers.

Does investor base affect the firm-level ex-ante cost of equity capital?

This research investigates how investor base affects the cost of equity capital (COE) in Indian companies, particularly in market conditions with weak investor protection and increased ownership concentration by promoters and families. Using ordinary least squares (OLS), panel fixed effects, and two-step system generalised method of moments (GMM) analysis on data spanning from 2016 to 2021, we discovered that a dispersed ownership structure is linked to a higher ex-ante COE. Our findings indicate that companies with dispersed shareholders have less motivation to monitor managers, which leads to the expropriation of minority shareholders and results in higher COE.

On the modelling of the effective longitudinal diffusion in bi-continuous chromatographic beds

We report on the possibility to extend to bi-continuous packings the two models for the effective longitudinal diffusion Deff, or B-term band broadening, recently proposed for discontinuous chromatographic beds. In bi-continuous packings, like monolithic columns, solutes experience a connected end-to-end pathway in both the mobile and stationary zones, as opposed to discontinuous packings, wherein the stationary adsorptive zone is distributed over a set of isolated elements. Since it is unclear whether a densely packed bed of spherical particles should be treated as a continuous or a bi-continuous medium, this extension is also crucial to fully understand the behaviour of packed particle beds. The proposed models for the effective longitudinal diffusion Deff originate from the adoption of the Two Zone Moment Analysis (TZMA) method by which Deff can be expressed as a linear combination of two essential quantities γm and γs, referred to as effective zone-diffusion factors. In the present work we propose two analytical models for γm and γs that now cover both the discontinuous and the bi-continuous case. To validate the theory, several bi-continuous packings are investigated, including the tetrahedral skeleton model (TSM), six different Triple Periodic Minimal Surface (TPMS) monoliths and randomly packed beds of spheres. For all of these, the models provide highly accurate results for Deff over a wide range of porosities and zone retention factors k″. The comparison with literature experimental data for both monolithic silica columns and columns packed with fully porous and porous-shell particles is also presented.

The Fabric of Transition: Unraveling the Weave of Labor Dynamics, Economic Structures, and Innovation on Income Disparities in Central and Eastern Europe Nations

In recent years, the issue of income inequality has ascended to the forefront of national and international agendas, underscored by the urgency to navigate the complexities of market-driven economies without exacerbating social disparities. These challenges are particularly pronounced in the post-communist nations of Central and Eastern Europe, where the transition legacy and the marketization forces present unique dynamics in the evolution of income disparities. This research investigates the intricate mechanisms through which marketization impacts income inequality within the Central and Eastern European countries context, aiming to uncover how economic transformations influenced by global sustainability goals can contribute to narrowing the income gap. By employing panel data estimation techniques and Generalized Method of Moments (GMM) analysis, this study highlights the enduring nature of income disparities and the critical roles played by economic growth, education investment, labor market reforms, globalization, and governance quality in shaping equitable income distributions. Findings reveal that, despite the competitive nature of market economies potentially creating disparities, strategic policy interventions in education, economic policy, and labor market regulations can mitigate the adverse effects of marketization on income inequality. Additionally, this research emphasizes the importance of strong institutional frameworks and the nuanced role of the informal economy in influencing income distribution dynamics.

Moment Analysis Method for Measurement of Reaction Equilibrium and Rate Constants by Using High-Performance Liquid Chromatography.

The moment analysis method was developed for the determination of association equilibrium constant (KA) and association (ka) and dissociation (kd) rate constants of intermolecular interactions between solute and ligand molecules. They are accurately determined by using moment equations from elution peak profiles because they are measured by using high-performance liquid chromatography (HPLC) under preferable conditions that neither immobilization nor chemical modification (i.e., fluorescence labeling) of solute and ligand molecules is required. To demonstrate the effectiveness of the method, it was applied to the inclusion complex formation system between dibenzo-18-crown-6 (DB18C6) and alkaline earth metal cations, i.e., Mg2+, Ca2+, and Sr2+, as a concrete example. Because the diameter of the three metal cations is smaller than that of the inner cavity of DB18C6, the values of KA, ka, and kd were analytically determined by assuming the stoichiometry of 1:1 between DB18C6 and the metal cation. They reflected the influence of the difference in the size between the inner cavity of DB18C6 and the metal cations on the inclusion complex formation. It seems that the moment analysis method based on HPLC separation is effective for the multifaceted analysis of chemical reactions because some characteristics of the method are different from those of other conventional methods. It must contribute to the dissemination of an opportunity for the study of chemical reactions to many researchers because of the versatility of HPLC.

The Effect of Financial Inclusion on Inequality Income in East Java

This study analyzes the impact of financial inclusion on the level of income inequality 38 districts/cities in East Java from 2015 to 2021. Using the Generalized Method of Moment (GMM) analysis, its is known that financial inclusion has a negative influence on the level of income inequality in East Java. That is, the more financially inclusive in East Java, the lower the income inequality that occurs. Based on these results, the efforts that have been taken so far by the East Java government to increase financial inclusion must continue to be increased so as to reduce the level of income inequality between districts/cities in the province.

The impact of credit risk on market discipline: Exploring the moderating role of corporate governance through Generalized Method of Moments (GMM) analysis in banking companies

High credit risk poses a significant threat to banks, underscoring the necessity to examine the effectiveness of good corporate governance in mitigating such risks. This study aims to assess the impact of credit risk, represented by non-performing loans (NPLs), on market discipline, reflected through deposit growth, and the moderating role of good corporate governance, focusing on board size and institutional ownership, in this dynamic. Data for the study were sourced from the financial reports of banking companies on their official websites, IDN Financial, and the Indonesia Stock Exchange. The study used a purposive sampling method to analyze a sample comprising 30 banking companies and yielded 300 observations. The research methodology involved dynamic panel regression analysis using the Generalized Method of Moments (GMM) technique. The findings reveal that non-performing loans negatively impact deposit growth. However, it was also found that board size and institutional ownership could positively moderate the adverse effects of non-performing loans on deposit growth. This suggests that market discipline, manifesting as a reduction in deposits and an escalation in credit risk within the Indonesian banking sector, can be effectively managed and mitigated through the strategic implementation of good corporate governance practices, particularly by optimizing board size and enhancing institutional ownership. These mechanisms enable more robust market discipline, contributing to better credit risk management and promoting healthier deposit growth.

Prediction of Plate Height Curves of Porous-Shell Pillar Array Columns Micro-Pillar Array Columns

We investigate band broadening in the most widely adopted configuration of micro-pillar array columns (μPACs)—specifically, a cylindrical pillar array where both the pillar walls and the channel bottom are coated with a thin layer of mesoporous material. The two-zone moment analysis method is adopted to investigate the dispersion properties of μPACs in a broad range of shell thicknesses, reduced fluid velocities, and retention factors. Three different models of the unit cell, of increasing complexity, have been implemented, namely a two-dimensional model and two different three-dimensional models with and without the retentive bottom layer, the presence of which seems to have a very significant effect on the plate height curves. Model predictions are compared with experimental van Deemter curves for uncoated and coated porous layers, and a robust relationship between the intra-particle (porous-zone) diffusion coefficient Dpz and the retention factor k′ is established.