In this study, the selective oximation of structurally diverse aromatic aldehydes (versus ketones) to the corresponding aldoxime derivatives was investigated using the combination system of NH₂OH.HCl and bisthiourea complexes of cobalt, nickel, copper and zinc chlorides, M^II(tu)₂Cl₂, in a mixture of CH₃CN‒H₂O (1:1 mL). All reactions were carried out successfully at room temperature within the immediate time up to 130 min giving the products in high yields. Investigation of the results exhibited that the applied bis-thiourea metal complexes show the catalytic activity in order of Co(tu)₂Cl₂₂Cl₂₂Cl₂₂Cl₂ in their oximation reactions.

Silver is a metal that offers significant value to both investors and companies. The purpose of this study is to make an estimation of the price of silver. While making this estimation, it is planned to include the frequency of searches on Google Trends for the words that affect the silver price. Thus, it is aimed to obtain a more accurate estimate. First, using the Latent Dirichlet Allocation method, the keywords to be analyzed in Google Trends were collected from various articles on the Internet. Mining data from Google Trends combined with the information obtained by LDA is the new approach this study took, to predict the price of silver. No study has been found in the literature that has adopted this approach to estimate the price of silver. The estimation was carried out with Random Forest Regression, Gaussian Process Regression, Support Vector Machine, Regression Trees and Artificial Neural Networks methods. In addition, ARIMA, which is one of the traditional methods that is widely used in time series analysis, was also used to benchmark the accuracy of the methodology. The best MSE ratio was obtained as 0,000227131 ± 0.0000235205 by the Regression Trees method. This score indicates that it would be a valid technique to estimate the price of "Silver" by using Google Trends data using the LDA method.

The interaction of (2-aryl-5-(hydroxyalkylamino)-1,3-oxazol-4-yl)phosphonates with hydrogen chloride, hydrogen iodide and hydrogen thiocyanate in anhydrous medium led to formation of new phosphorylated peptidomimetics containing C-terminal ω-haloalkyl and ω-thiocyanoethyl residues.

A novel trimetallic W-Mg-Al oxide composites immobilised onto starch were synthesized via sol-gel method. W-Mg-Al oxide composites were synthesized by first preparing WO₃ using incipient wetness method, followed by immobilising onto MgO-Al₂O₃ support using starch as binder. The effects of starch addition on the crystal properties and morphology were investigated by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy and Scanning Electron Microscopy (SEM). In the presence of hydrogen peroxide and acetic acid as oxidant system, W-Mg-Al oxide starch composites exhibited higher catalytic performances for oxidative desulphurisation (ODS) of dibenzothiophene (DBT) at 95% compared to W-Mg-Al oxide composites. The catalytic activity observed could be correlated to the distribution of active phases on starch as well as the higher crystallinity of the metal oxide composites.

This study examines the effects of board structure on information disclosure in annual reports of the listed firms in Sub-Saharan Africa countries' stock exchanges. Findings indicate that board size is positive and significantly related to information disclosure. However, findings indicate that the percentage of outside directors is not significantly related to information disclosure. This study contributes to corporate governance literature, especially in regard to the association between attributes of board structure and information disclosure. Findings of this study provide some practical benefits to regulators and policymakers in understanding the nexus between board structure and information disclosure in Sub-Saharan Africa. This would help policymakers and regulators to formulate policies and regulations with regards to board structure and good corporate governance practices, specifically those related to information disclosure.

This research analyses how different leadership styles affect project managers in the telecommunications sector, focusing on transactional and transformational leadership's direct effects on project performance. Ambidextrous Leadership's role as a mediator is explored alongside the influence of Project Management approaches (Waterfall, Agile, Hybrid) and Project Manager Certifications. Data from 224 Project Managers in 77 Indonesian telecom companies was examined using Structural Equation Modelling Partial Least Square (SEM PLS). The findings indicate that Transactional and Transformational Leadership alone don't directly affect Project Performance, but Ambidextrous Leadership significantly enhances it. Different Project Management Approaches (Waterfall, Hybrid, Agile) amplify the impact of leadership styles. Transactional leadership is strongly linked to the waterfall, while transformational and ambidextrous leadership aligns with the agile and hybrid approach. Project Management Certification strengthens Transactional Leadership's effect on Project Performance, with less impact on Transformational Leadership. The research emphasizes the significance of Ambidextrous Leadership in improving project performance and how project management approaches and certifications can enhance or moderate the influence of leadership styles on telecommunication project management. These findings offer industry practitioners and organizations valuable insights, contributing to leadership, project management, and telecommunications research.

COVID-19 has caused severe disruptions in global economic activities, and its impacts on stock markets cannot be overemphasized. The study employs market model and event study approach with four events (WHO announcement of COVID-19 as a global health emergency, confirmed infections, confirmed deaths, and vaccination) to examine the reactions of four African regional blocs’ markets to the pandemic from September 1, 2019, to August 31, 2021, to estimate the average abnormal returns of each regional bloc. On the day of the WHO announcement, we document insignificant negative average abnormal returns in the Northern bloc. We also document significant negative average abnormal returns for infections in all but the Northern bloc on the event day. The Western bloc generated the highest significant negative average abnormal return (-43 per cent) on the day COVID-19 death was confirmed on the continent. We finally document insignificant average abnormal returns from weeks 1 to 20 after the first vaccination in the Northern and Eastern blocs. The study recommends that investors, portfolio managers, and speculators not panic during similar pandemics since they can generate significant abnormal returns and diversify their investment holdings across the four regional blocs in Africa, as demonstrated by the COVID-19 pandemic.

The government of India has increased its focus on investment in infrastructure, allocating US$ 130.57 billion in 2022-23 for the sector. Effective project management is crucial for success. However, despite a huge body of knowledge on project success, project delays persist, with 33% of projects delayed by an average of 47 months as of August 2021. This study aims to identify Critical Success Factors for contemporary construction projects in India, offering guidance for project stakeholders. Forty-five attributes of project success were collated from literature and expert discussions and a questionnaire survey was conducted to solicit the views of experts on the critical impact of these attributes on overall project success. The research posits that these attributes have underlying constructs that cause them. Factor analysis was employed to extract the underlying constructs. Six critical success factors (CSF) were extracted. To comprehend the relative importance of the factors, RII was employed on summated factor scores that were then ranked in order of their importance. ANOVA showed consistent assessments of the CSFs across professional roles and geographies. The findings are expected to aid project professionals in prioritizing key factors for optimal project management and successful outcomes.

This study conducted a test to see the influence of budgeting participation on working performance through managers’ commitment as an intervening variable of managers manufacturing companies listed on Indonesia Stock Exchange (IDX). This study used descriptive analysis and statistical method Structural Equation Modeling (SEM)-Lisrel. The data was collected by using questionnaires given to 124 managers from 108 manufacturing companies listed on Indonesia Stock Exchange. The result showed that budgeting participation has a positive and significant influence on the managers’ performance through managers’ commitment as an intervening variable. The findings of this study added to the limitations of the research literature on the elaboration of variables that determine managers’ commitment and manager’s performance in manufacturing companies.

Economists have exploited the social accounting matrix in linear economic models to analyze the effect of some variables such as government spending, investment, and export on other economic indicators including total output, employment, household income, and economic growth. In this paper, the influence of investment injection on some economic indicators is analyzed. In addition, to gather different indicators in a general view, these economic indicators are applied as inputs and outputs in a data envelopment analysis model. Overall, to get to the best possible economic conditions, a fair revenue allocation method is used based on a data envelopment analysis model to determine each economic sector’s quota of investment. Next, a kind of fair-biased allocation method improving the economic conditions in comparison to the prior model is proposed. Finally, the whole process for Iran’s social accounting matrix and subsequent results are presented.