Cross-Correlation-Based Fisheries Stock Assessment Technique: Utilization of Standard Deviation of Cross-Correlation Function as Estimation Parameter with Four Acoustic Sensors

In the past, cross-correlation-based fisheries stock assessment technique utilized the mean and the ratio of standard deviation to the mean of cross-correlation function (CCF) as estimation parameter. However, in this paper, we have utilized only standard deviation of CCF as estimation parameter to estimate the population size. We utilized four acoustic sensors and considered chirp sound which is commonly generated by damselfish (Dascyllus aruanus), humpback whales (Megaptera novaeangliae), dugongs (Dugong dugon), etc., species to accomplish the simulations. We found that a robust estimation can be obtained using standard deviation of CCF as estimation parameter even when the distances between acoustic sensors are small

A comprehensive review on advances in TiO2 nanotube (TNT)-based photocatalytic CO2 reduction to value-added products

The photocatalytic reduction of CO2 into solar fuels by using semiconductor photocatalysts is one of the most promising approaches in terms of pollution control as well as renewable energy sources. One of the crucial challenges for the 21st century is the development of potential photocatalysts and techniques to improve CO2 photoreduction efficiency. TiO2 nanotubes (TNTs) have recently attracted a great deal of research attention for their potential to convert CO2 into useful compounds. Researchers are concentrating more on CO2 reduction due to the rising trend in CO2 emissions and are striving to improve the rate of CO2 photoreduction by modifying TNTs with the appropriate configuration. In order to portray the potential applications of TNTs, it is imperative to critically evaluate recent developments in synthesis and modification methodologies and their capability to transform CO2 into value-added chemicals. The current review provides an insightful understanding of TNT production methods, surface modification strategies used to enhance CO2 photoreduction, and major findings from previous research, thereby revealing research gaps and upcoming challenges. Stability, reusability, and the improved performance of TNT photocatalysts under visible light as well as the selection of optimized modification methods are the identified barriers for CO2 photoreduction into valuable products. Higher rates of efficacy and product yield can be attained by synthesizing suitable photocatalysts with addressing the limitations of TNTs and designing an optimized photoreactor in terms of the proper utilization of photocatalysts, incident lights, and the partial pressure of reactants

Recent progress in TiO2-Based photocatalysts for conversion of CO2 to hydrocarbon fuels: A systematic review

Photocatalytic conversion of CO2 by using sunlight and TiO2 photocatalysts is a promising approach which produce hydrocarbon fuels to meet the future energy demands with hardly affecting the environment. This systematic review aims to provide rigorous overview of recent progress in TiO2-based CO2 photoreduction to produce hydrocarbon fuels along with future challenges. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method was adopted to perform this systematic review. It uses explicit systematic approaches that are chosen to prevent bias, resulting in accurate data collection which helps to draw reliable conclusions. Peer-reviewed articles published in English language between year 2018–2022 were chosen from two main databases, namely Web of Science and Scopus. Depending on the search criteria 62 articles were selected for reviewing critically. Literature suggests that TiO2-based photocatalysts have been increasingly used for reducing CO2 to hydrocarbon fuels. Morphological alterations and surface modification techniques have been widely utilized to improve the photocatalytic performance and minimize limitations of pure TiO2. Despite extensible efforts in this field, the utilization of hydrocarbon fuels still far away from practical applications. There are some challenges need to be addressed like environment friendly low-cost synthesis and modification method development, maximum visible light utilization, design of photoreactor with suitable product selectivity and kinetic model development for CO2 reduction. This study portrays increased clarity regarding the advances and way forwards of crucial topics TiO2-based CO2 photoreduction. Such systematic review is crucial for researchers and academicians for setting future planning

Performance evaluation of dye wastewater treatment technologies: A review

Dye wastewater released from several dyes induced industries are harmful towards the living, non-living environment and human. Consequently, existence of dye in water bodies is becoming a rising concern to environmentalists and citizens. Dye wastewater should be treated prior to release in an open water body to minimize its negative impacts. A long term sustainable and efficient treatment methods should be established to reduce and overcome the impacts. Although there have been significant advances in the management and treatment of such effluent using physical, chemical and biological methods. However, due to lack of information on effective dye removal methods, it is difficult to decide on a single unique technique that resolves the prevailing dye wastewater. Therefore, this paper reviews recent research on various (physical, chemical, biological, advanced oxidation process (AOPs) and hybrid) dye removal methods to compare efficiency, evaluation performance, merits and demerits. Among the existing methods, most of them have a common disadvantage which is the generation of secondary pollutes, takes long time and costly. This paper especially highlights AOPs method for dye removal as these are known as one of the promising and most effective dye removal techniques these days. This paper also suggests the application of AOPs methods possess the best performance in terms of faster dye removing as well as cost effective, time oriented and environmentally friendly. Additionally, this paper addressed the difficulties and future prospects of this emerging method that links to sustainable development

Enhanced Photocatalytic CO2 Reduction to CH4 Using Novel Ternary Photocatalyst RGO/Au-TNTAs

Abstract: Photocatalytic CO2 reduction into hydrocarbon fuels is one of the most efficient processes since it serves as a renewable energy source while also lowering atmospheric CO2 levels. The development of appropriate materials and technology to attain greater yield in CO2 photoreduction is one of the key issues facing the 21st century. This study successfully fabricated novel ternary reduced graphene oxide (RGO)/Au-TiO2 nanotube arrays (TNTAs) photocatalysts to promote CO2 photoreduction to CH4. Visible light-responsive RGO/Au-TNTAs composite was synthesized by facile electrochemical deposition of Au nanoparticles (NPs) and immersion of RGO nanosheets onto TNTAs. The synthesized composite has been thoroughly investigated by FESEM, HR-TEM, XRD, XPS, FT-IR, UV-Vis DRS, and PL analyzer to explain structural and functional performance. Under the source of visible light, the maximum yield of CH4 was attained at 35.13 ppm/cm2 for the RGO/Au-TNTAs composite photocatalyst after 4 h, which was considerably higher by a wide margin than that of pure TNTAs, Au-TNTAs and RGO-TNTAs. The CO2 photoreduction of the RGO/Au-TNTAs composite has been improved due to the combined effects of Au NPs and RGO. Due to its surface plasmonic resonance (SPR) mechanism, Au NPs play a crucial role in the absorption of visible light. Additionally, the middle RGO layers serve as effective electron transporters, facilitating better separation of electron-hole pairs. The newly constructed composite would be a promising photocatalyst for future photocatalytic applications in other fields

Teaching Language through Literature to Tertiary level students: A Study on English Language Teaching in Cumilla region of Bangladesh

English has become a global language in the present world. Teaching English language is not a new issue in Bangladesh. Because of the growing demand for English after World War II, teaching English to non-English speaking nations, such as Bangladesh, has become a challenge. The researchers have devised a plethora of methods for improving foreign language teaching. Literature in teaching language plays a vital role in developing the concepts and ideology of the language teachers and learners. The students can develop their consciousness regarding language use as well as building their good communication skills in order to achieve the foreign language. This study focuses on examining the great resources in language teaching including literature, film and others. The research evaluates on how literature can be terned as a great resource in teaching for developing different skills of the students such as Listening, Speaking, Reading and Writing. It also includes the distinct areas of other skills including Vocabulary, Pronunciation and Grammar. In Bangladesh English language is taught in different ways at different levels. This study is a mixed method approach conducted in the Cumilla region of Bangladesh. Data has been collected from the students and teachers of three different institutions located in Cumilla through the questionnaire method. To conduct the research, interviews from the experienced faculty members have been taken. After analyzing the data, some problems have been figured out proposing probable solutions to these problems. Based on the outcome of this research, some recommendations are suggested for this specific field of teaching language through literature in the EFL context in Bangladesh. Key Words: Literature, Language, Culture, Literary resources, Language Skills, ELT, EFL, Literary texts. DOI: 10.7176/JEP/13-2-02 Publication date: January 31st 2022

Determinants of internal corporate social responsibility practices and employee engagement: a study of Malaysian private higher education institution

Corporate Social Responsibility (CSR) has emerged tremendously as an important field of study. However, the influence of internal corporate social responsibility (ICSR) practices in education industry remain understudied. The purpose of this study was to investigate the relationship between ICSR practices and employee engagement in a private university in Malaysia. A quantitative (survey) method was employed using purposive sampling in which 93 valid responses were generated. The data were then analyzed using Pearson-Product Moment Correlation and Multiple Regression test through the Statistical Package for the Social Sciences (SPSS) version 25.0. Based on the findings, ICSR dimensions, namely training & education and working environment yielded positive and moderate relationships with employee engagement, whereas employment stability and employee empowerment generate positive and high relationships with employee engagement. In addition, multiple regression analysis showed that employment stability and training & education were the significant two predictors that can help to increase the employee engagement. Conclusion, implications, and suggestions for future studies are also discussed

Mediating role of job satisfaction on internal corporate social responsibility practices and employee engagement in higher education sector

The study aims to investigate the relationship between internal corporate social responsibility (ICSR) practices and employee engagement through job satisfaction as a mediating variable. The ICSR dimensions are comprised of employee empowerment, education and training, employment stability, as well as a working environment. This study is based on the social exchange theory to explore the relationship between the above factors and ICSR. In this study, purposive sampling was adopted. A quantitative (survey) method was employed, generating 93 valid responses. The data was then analyzed using Partial Least Square Structural Equation Modelling through Smart-PLS 3.0. The results revealed that ICSR practices, namely employee empowerment, and employment stability contributed positively to job satisfaction. However, training & education and working environment were found not significant to job satisfaction. In addition, job satisfaction has a positive influence on employee engagement. The results of the study found that except for training, education, and the work environment, job satisfaction mediates the relationship between ICSR practices and employee engagement. Conclusion, implications of the findings, and suggestions for future study are also discussed