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Mechanical Properties of FSW Joints Magnesium Alloy at Different Rotational Speeds
Magnesium (Mg) has become a focus in the transportation industry due to its potential in reducing fuel consumption and gas emissions while improving recyclability. Mg alloys are also known for their low neutron absorption, good resistant of carbon dioxide as well as thermal conductivity which makes them suitable for use in industrial equipment for nuclear energy. there has been an increasing interest in the research and development of Mg alloys. These are the lightest of all metallic structural materials and are approximately 33% lighter than aluminium (Al) and 75% lighter than ferrous (Fe) alloys and have excellent specific mechanical properties. In this work, FSW of AZ31B Alloy was examined at the various rotational speeds of 900 -1440 rpm, with fixed welding speed of 40mm/min and 2 tool tilt angle using an HSS tool. The mechanical properties were compared for the different rotational speeds. The quality of FSW joints is dependent on input value of heat and material flow rate, which are prejudiced by process parameters., higher rotation speeds may cause abnormal stirring, resulting in a tunnel defect at the weld nugget due to increased strain rate and turbulence. 2024 E3S Web of Conferences -
Mechanical strength and impact resistance of hybrid fiber reinforced concrete with coconut and polypropylene fibers
This experimental study investigates the mechanical properties and resistance to impact of concrete reinforced with coconut fibers (CF) and polypropylene fibers (PPF). The fiber proportions were decided based on the results obtained from the tests on coconut fiber reinforced concrete (CFRC) and polypropylene fiber reinforced concrete (PPFRC), tested individually. PP fibers of 12 mm and 24 mm of 0.1%, 0.2%, and 0.3% of the volume of concrete were used in PPFRC. Coconut fibers having 50 mm and 75 mm of 0.2%, 0.3%, and 0.4% of the volume of concrete were used in CFRC. Based on test results, PPF (12 mm) and CF (50 mm) were selected for hybrid fiber reinforced concrete (HyFRC). By varying both PPF and CF content, three different proportions with a total fiber content of 0.2% and 0.3% of the volume of concrete were selected. The improvement in strength was observed to be maximum when the total fiber content in the hybrid fiber reinforced concrete was 0.3%. The increase in impact resistance of HyFRC was almost double that of individual FRC and three times that of plain concrete. 2022 -
Mechanical Strength and Microstructure of GGBS-SCBA based Geopolymer Concrete
This paper deals with the attempt to develop and study the performance of ground granulated blast furnace slag (GGBS) and sugarcane bagasse ash (SCBA) based sustainable geopolymer concrete. NaOH (8M, 10M, and 12M) and Na2SiO3 were used as alkaline activators with a ratio of 2.5. SCBA mainly acted as amorphous silica and has been utilized as a substitute material for GGBS. The effect of SCBA contents (0%, 5%, 10%, 15% & 20% by the mass of binder) in terms of fresh, hardened, microstructural, and correlation properties of geopolymer concrete developed have been evaluated. Different tests such as the slump cone test, compression test, split tensile test, flexure test, and ultrasonic pulse velocity test were conducted. Scanning electron microscopy, Energy dispersive analysis, and X-ray diffraction analysis were investigated for understanding the microstructural properties. The research findings have shown that with an increase in molarity from 8M to 12M there is an increase in the strength properties of geopolymer concrete. The results in this current study show that 28 days compressive strength was found to increase by 415% when the NaOH molarity was increased from 8M to 10M and 821% when the NaOH molarity was increased from 8M to 12M. The geopolymer concrete developed with 20% SCBA and 80% GGBS with 8M NaOH solution and SS/SH ratio of 2.5 can be used for a target strength of 3035 MPa. Scanning electron microscope images show a packed and dense matrix, which clearly outlines the reason behind the attainment of higher strength in higher molarity of GGBS-SCBA based geopolymer concrete samples and the presence of CASH gel confirmed this in the geopolymer matrix. Furthermore, there is a strong correlation between the experimental findings and the model equations proposed. These presented models will be useful in improving the strength of geopolymer concrete incorporating agricultural and industrial wastes. 2023 The Authors -
Mechanical strength and water penetration depth of palmyra fibre reinforced concrete
Natural fibre reinforced composites are replacing the conventional fibre reinforced composites for several applications due to natural fibre availability, variety and lesser raw material cost. Using natural fibres in composites also reduces the issue of agricultural residue disposals, which are in abundance. Different natural fibres exhibit unique properties when it is used in composites and hence there is a need to study the behaviour of scarcely used natural fibres. Indian palmyra trees (Borassus flabellifer) are fast growing commonly found trees in Southern India. From the base of these palm tree leaves, palmyra fibres are taken out. Though these fibres are locally available in huge quantities, these are very rarely used as reinforcing material in concrete compared to other natural fibres like coir, sisal, jute etc. Palmyra fibre reinforced cement composite specimens were prepared by varying the fibre content (0.5%, 1% and 2% by weight of cement) and length of fibre (25 mm and 50 mm). Plain concrete and palmyra fibre reinforced concrete specimens of identical size were tested for mechanical strength and also for its depth of water penetration. The work carried out revealed that the water penetration of palmyra fibre reinforced concrete increased with fibre content increase. The compressive strength of palmyra fibre reinforced concrete improved up to 1% of fibre content and further increase in fibre content upto 2% resulted in compressive strength reduction for both the fibre lengths. However, split tensile strength, flexure strength and shear strength increased with fibre content increase in the mix. Based on the mechanical strength properties investigated, increase in shear strength was found to be more significant with the inclusion of palmyra fibres in concrete. 2022 -
Mechanics of SH and anti-plane SH waves in orthotropic piezoelectric quasicrystal with multiple surface effect
Significant restrictions have been found in the selection of piezoelectric materials and the direction of wave propagation in earlier studies on surface acoustic wave sensors. The primary goal of the current work is to investigate how wave propagation direction influences the performance of SAW macro- and nano-sensors in an effort to remove such barriers in the technological revolution of SAW sensors. A proposed model is established to study Shear Horizontal (SH) and anti-plane SH wave propagation in piezoelectric materials with surface effects. The theoretical forms are constructed and used to present the wavenumber of surface waves in any direction of the piezoelectric medium, based on the Extended Stroh formalism. In addition, we take into account surface elasticity theory in order to obtain the phase velocity equation based on the wavenumber expression. The model incorporates surface elasticity, piezoelectricity, and permittivity to account for nanoscale surface phenomena. Two configurations are examined: an orthotropic piezoelectric material layer over an elastic framework and a piezoelectric material half-space with a nano substrate. Analytical expressions for frequency equations are derived for both symmetric and anti-symmetric waves. Numerical results highlight the critical thickness of the piezoelectric layer, where surface energy significantly influences dispersion properties. The effects of surface elasticity and density on wave velocity are analyzed, revealing a spring force-like influence on boundaries. The research investigates SH wave transmission in anisotropic, transversely isotropic piezoelectric nanostructures. The findings could aid in designing SAW devices and piezoelectric sensors, as well as producing more effective surface acoustic wave sensors, based on recent theoretical work summaries. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2024. -
Mechanisms Linking Gratitude to Life Satisfaction among Adults : A Mixed - Methods Study
The study examined the relationship between gratitude and life satisfaction in educated adults in an Indian context and the mediation of affect, schema and coping. The sample comprised 711 males and females (18-45 yrs). The research utilised a sequential explanatory mixed methods design, incorporating a follow-up explanation model (Creswell & Creswell, 2017). The initial quantitative phase addressed research questions concerning how the selected variables mediate the relationship between gratitude and life satisfaction. Mediation analysis revealed that positive affect and positive self/others partially mediated the relationship between gratitude and life satisfaction. There is no influence of gender in the role of gratitude in life satisfaction. The quantitative data held significance as it served as the foundation for subsequent qualitative analysis. The two-phased data collection facilitated a comprehensive exploration of the research questions, and integrating quantitative and qualitative data provided a better understanding of the relationships under investigation. A semi-structured interview was designed in the qualitative phase, incorporating insights from the survey results. The interview questions explored participants' perceptions and experiences regarding how various factors contribute to connecting gratitude with life satisfaction. A thematic analysis was performed to recognise the themes expressed by the participants, as outlined by Braun and Clarke in 2013. Three broader themes were derived, incorporating the 14 categories identified through coding. The three identified themes from the qualitative analysis are: 1. Life satisfaction through positive emotions; 2. Self-oriented schema promotes a sense of satisfaction, and 3. Positive connections with others enhance happiness. The qualitative data enrich our understanding by illustrating how participants who prioritise others' well-being and maintain meaningful social connections experience enhanced happiness. The quantitative findings are reinforced by the qualitative insights, which highlight that positive emotions serve as an emotional bridge that connects the feelings of gratitude to an overall sense of happiness, enhancing life satisfaction. This integrated approach enhances our understanding of how gratitude influences emotional well-being, ultimately contributing to overall life satisfaction. The identified themes of life satisfaction through positive emotions, self-oriented schema, and positive connections with others yield valuable implications. Implementing gratitude-focused interventions offers actionable steps for individuals, educators, and mental health practitioners to enhance overall well-being. -
Mechanisms towards enhanced quality of experience (QoE) in fog computing environments
The Fog or Edge computing emerges as one of the important paradigms for setting up and sustaining smarter environments across industry verticals. Our everyday environments are being meticulously advanced and accentuated through a bevy of edge and digital technologies and tools in order to be situation-aware and sophisticated. On the other side, we have powerful Cloud environments contributing as the one-stop IT solutions not only for business automation but also for people empowerment. Compared to the number of prospective Cloud environments, the number of Fog environments is going to be quite large with the availability of billions of connected devices. The scope of Fog environments, which are being touted as the most crucial for empowering people and in their everyday activities, is bound to escalate in the days to unfurl. The immediate challenge for Fog environments is to drastically enhance the quality of experience (QoE) for users. Academic professors and industry professionals have come out with a number of solution approaches and algorithms. This chapter is being specially prepared and presented in this book to tell all about the role and responsibility of Fog computing environments, the unique use cases and the various challenges, etc. Furthermore, the significance of QoE is described in detail and how that requirement can be attained by smartly applying various proven and potential technologies. This chapter also aims to motivate the readers and researchers to dig deep into this new critical requirement to unearth pioneering solutions towards enhanced QoE. Springer International Publishing AG, part of Springer Nature 2018. -
Media and Urban Governance: The Quest for Sustainable Cities and Communities
Connectivity becomes the hallmark of network society facilitated by digital technologies. Cities are fundamentally well-connected, fast-growing, communicative, and global in outlook. Cities are also known for media concentration, as the structures and people there extensively create and exchange messages - social, political, economic, and cultural. The urban communication landscape is very complex, and therefore, a robust media and communication infrastructure is required to form, reform, and transform urban communities from a sustainable development perspective. Media not only perform the responsibilities of information dissemination and community building but also facilitate urban governance and public discourses on policies. The policy-making process that consists of policy inputs, policy processes, and policy outputs - is heavily influenced by the public discourses triggered by the media. Media can establish a policy issue at the center of the public sphere, set the policy agenda, and create public opinion. It inevitably leads to the mediatization of public policy. Media can effectively place SDGs at the center of the policy discourse and serve as a tool for urban governance by enhancing citizens' participation and helping to solve complex urban problems. This research paper explores various aspects of the governance-media interface in an urban landscape to create sustainable cities and communities. The Electrochemical Society -
Media Ethics in Times of Demonetization: Framing Debates in English News Channels
Objectivity has been a traditional ideal for journalism. Journalists are trained to be objective; they do not frame stories by themselves????or do they? Faced with the pressure of deadlines, strained resources and the perception that audience prefer reportorial style, journalists resort to amusement or conflict based reporting positioning one side against the other and often aggravating facts and issues. The public today expresses disappointment with current media practices. Media watchers argue that instead of improving the quality of programming, competition has resulted in a race to the bottom, where news channels have conveniently forgotten basic ethical norms. This study is an attempt at re-visioning media ethics. It is believed that ethical journalism is never more important than in the time of crises. Taking India???s recent economic crisis, demonetization, this research aims to answer what makes it difficult for journalists to adhere to ethics especially during crises? With emphasis on situation faced by reporters, pressure imposed on them by various sources and ethical dilemma, this study provides answers to the questions posed on the work of journalists. Content analysis of demonetization debates broadcasted on two popular English news channels and interview responses of experienced journalists of Indian news media goes to explain how demonetization was represented by Indian news channels and to what extent journalistic ethics was reflected in their content. -
Media Framing of Indian Green Fiscal Policy: A Survey of Environmental Policies Across Online News Portals
This research undertakes a framing analysis of news coverage from five leading Indian news portals, focusing on the environmental provisions of India's fiscal budgets for 2022-23 and 2023-24. These budgets marked a significant shift, being the first to prioritize "Energy Transition and Climate Action" and "Green Growth" as central themes. The analysis uncovers a spectrum of portrayals: from highlighting government initiatives and the potential economic windfalls of green policies to critical evaluations and concerns about their real-world implications. Specifically, the Times of India, with its 27 stories, leans heavily towards business and economic perspectives. The Hindu, through its five stories, both praises the government's green initiatives and critiques certain infrastructure projects. Hindustan Times offers a balanced view in its nine stories, juxtaposing government action plans against critiques of infrastructure spending. In contrast, The Scroll and The Wire, each with three stories, delve deeper, providing incisive, critical analyses of the government's environmental commitments. The study underscores that while independent news portals present nuanced insights, their narratives often stand in the shadow of mainstream portals that echo the government's perspective. Given the escalating global importance of environmental challenges, the findings strongly advocate for media outlets to establish dedicated environmental news sections. Such focused coverage could enhance public awareness and pressurize effective governmental action in the domain of green fiscal policies. 2023 by authors, all rights reserved. -
Media in everyday life: review of the series Reply 1988
[No abstract available] -
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MEDIA MOTIVATION BEHIND WATCHING POPULAR BOOK BASED MOVIES
This dissertation explores the one medium that the youth choose to get influenced by when it comes to watching popular fantasy book based movies. It is based on the assumption that the influencers may be many but ultimately the youth rely on one main medium to make their movie watching decision. The books which the movies are based on, advertising media and user generated word of mouth communication were considered as strong individual influencers. The researcher first aimed at finding out which medium motivated youngsters to watch the first fantasy book based movie of the series and consequently whether the same medium influenced the youngsters to watch the remaining movies in the series. The researcher went on further, to find out which advertising medium most motivated youngsters to watch the movie series irrespective of whether advertising proved to be the strongest influencer or not. The researcher chose the Harry Potter book based movie series, the Twilight book based movie series and the Lord of the Rings book based movie series and restricted the target audience to the age group of 18-25 years. 90 respondents were allotted questionnaires out of which 30 respondents each belonged to the Harry Potter, Twilight and Lord of the Rings category. They were further equally divided on the basis of gender to negate bias. The major conclusion was that user generated word of mouth communication proved to be the strongest influencer when it came to watching the chosen popular fantasy book based movies and brought about the importance of TV ads as the ones with the most potential when it came to influencing those respondents in the advertising category. However the researcher cautions the readers that these findings may be applicable to other popular fantasy book based movies only if they fall in the same category as the ones chosen for this research. -
Media's influence on suicide: Building a safer online world for all
In 1999, World Health Organization (WHO) initiated a global campaign focused on suicide prevention. In collaboration with International Association for Suicide Prevention, WHO compiled recommendations and resources intended to educate various societal and groups with the potential to impact suicide prevention, and this included the media. In order to combat the alarmingly high incidence of suicides (Tandon and Nathani, 2018), it is imperative to institute guidelines outlining how the social media forums ought to disseminate altruistic, essential educational content while. This work is a step toward achieving the same by laying down guidelines that could potentially reduce the suicide rate. 2023 Elsevier B.V. -
Media's portrayal of women activists - A comparative case study on Malala Yousafzai & Irom Sharmila /
Media has always played a major role in depicting various sections of the society, various aspects of life and people and thus enabled the common man have various perspectives. Sometimes, media becomes selective and refuses to properly execute certain news. Media can play a useful role in dissemination of information, but it when it comes to the process of portraying the women who have stood up for something, is the efficiency same? -
Mediating and moderating variables of employee relations and sustainable organizations: a systematic literature review and future research agenda
Purpose: This study aims to perform a systematic literature review to organize the abundance of information on employee relations (ER) and sustainable organizations. Moreover, this study identifies the research gaps by investigating the review of ER mediating and moderating variables and the relationship between ER and sustainable organizations. Design/methodology/approach: This study is based on the systematic literature review methodology involving 257 studies in the final stage. The Scopus and Google Scholar databases with search criteria employee relations and employee relations and sustainable organization were used to achieve the research objective. After applying inclusion and exclusion criteria, researchers come to the distribution of the articles based on the subthemes, geographical region, types of methods, top authors with affiliation and complete research articles based on the citation. In the final stage, this study concluded with the conceptual model comprising mediators and moderators of ER as well as the mediating and moderating variables of the relationship between ER and sustainable organizations. Findings: The reviewed literature shows that employee relation is an optimal strategy for retaining employees via proper disclosure of human resources (HRs) and ER Index. This study included the top six publishers, namely, Emerald, Elsevier, Sage, Springer, Taylor and Francis and Wiley Online Library, to do an exhaustive review on a specific topic. The findings indicate that after COVID-19, the ER index, HR disclosures and the sustainability of ER are among the new and required paradigm shifts needed to manage a crisis impact and perform productively. The mediator and moderator variables that can improve employeeemployer relationships are organizational trusts, organizational justice, perceived job satisfaction, organizational structure and firm ownership. On the other hand, variables that mediate and moderate the relationship between ER and sustainable organizations are organizational climate, organization trust, organization culture, perceived organization support, psychological empowerment, firm ownership, leadership behavior and attitude, respectively. The findings concluded that harmonious and cordial ER are pertinent in building sustainable organizations and accomplishing organizational goals. Practical implications: The mediating and moderating variables that have been identified can be helpful for enthusiastic researchers in contributing to empirical research. Practitioners and managers can use the findings in making an effective organizational model that develops good employeeemployer relationships and helps create a culture of trust and harmony. This study focuses on exploring the variables of ER, which strengthens employeeemployer relationships and supports organizations to stay agile and attain sustainability to endure in the future. Originality/value: This study insights on the specific mediating and moderating variables of ER and sustainable organizations. Till date, studies exploring constructs of ER and sustainable organizations are still in deficit. Better employee relation reflects and leads to a more resilient organization. Future researchers should explore the connection between pandemics and ER which is done insufficiently in the present time. 2022, Emerald Publishing Limited. -
Mediating Effect of Brand Relationship Quality on Relational Bonds and Online Grocery Retailer Loyalty
The current study aims to identify how brand relationship quality mediates the relationship between different online relational bonds, and attitudinal and behavioral loyalty. A total of 316 valid questionnaires from respondents aged 2035 were collected using quota sampling from five different clusters in Bangalore, India. Hypotheses were tested using structural equation modeling. This study finds that convenience bonds and structural bond have no impact on brand trust and attitudinal and behavioral loyalty. All five relational bonds namely, convenience, structural, financial, empathy, and social bonds are seen to influence their sense of community and attitudinal attachment. Sense of community is the primary influencer of brand loyalty. This study reveals that brand dimensions of brand quality relationship mediate the effect of financial, empathy, and social bonds on attitudinal and behavioral loyalty. It also illustrates the role of different relational bonds as a stimulus, and relationship quality dimensions as an organism that lead to improved customer loyalty in online grocery retailing. Managers of online grocery stores can consider these new relational bonds, along with the traditional bonds, to develop positive emotions and achieve competitive advantage. 2021 Taylor & Francis Group, LLC. -
Mediating Effect of Digital Literacy Between Attitude Towards AI and Job Insecurity Among HR Professionals
As businesses continue to incorporate technologies that use AI into a variety of business processes, the connection between employee attitudes towards AI and job insecurity has attracted some attention. However, a critical aspect that has not been covered in the existing literature is the potential mediating role of digital literacy in shaping this relationship. This study investigates the interplay between attitudes towards AI, job insecurity, and digital literacy among HR employees through an online survey. Utilizing established scales, including Attitudes Towards AI (ATAI), Job Insecurity, and Digital Literacy, significant results reveal a substantial mediated relationship. Finding also states a significant impact of attitudes towards AI on job insecurity. Acceptance AI attitude indirectly reduce job insecurity through heightened digital literacy. Also, the pivotal role of digital literacy as a mediator, emphasizing its importance in alleviating job insecurity concerns amidst AI integration. These findings offer practical insights for organizations seeking to foster employee confidence in AI-rich workplaces. The Author(s), under exclusive license to Springer Nature Switzerland AG 2024. -
MEDIATING EFFECT OF PERCEPTION OF POLITICS BETWEEN DISTRIBUTIVE JUSTICE AND TURNOVER INTENTION OF EMPLOYEES IN INFORMATION TECHNOLOGY ORGANIZATIONS
During the past few decades, organizational researchers have increasingly focused their attention on the subjective work issues and their impact on various work related outcomes. One of the most prominently studied factor perception of organizational politics has received much recent conceptual and empirical attention. Political work environment are responsible for a variety of harmful work consequences like higher stress, lower job satisfaction and commitment, diminished worker productivity and higher rate of turnover (Ferris et.al 1989, 2002; Kacmar and Baron, 1999) Some researchers focused on the distributive justice aspect as predictors of important outcomes here they pursued studies from the opposite perspective while they examined Perception of politics (Ferris and Kacmar, 1992; Kacmar , Ferris, 1991). Thus research has demonstrated the independent influences of politics, distributive justice, on turnover intention, job satisfaction etc (Cropanzano et.al 1992; Mcfarlin and Sweeney, 1992). Very few studies attempted in finding out how these elements of fairness influence each other in predicting outcomes. In the current study, the mediating effect of perception of politics between distributive justice and turnover intentions has been examined. This study extends the previous research efforts and fills a gap in the reviewed literature by simultaneously investigating the mediation effect of perception of politics between distributive justice and turnover intention of employees in Information technology organizations. 343 employees from the top 10 IT organization as listed by NAASCOM were involved in the present study. The purposive sampling technique was adopted. Employees with minimum 2 years of experience in the organization was chosen as respondents. The major objectives of the study are, to measure employees perception of politics and employees perception of distributive justice; to study the turnover intention of IT employees; to find if perception of politics mediates the relationship between distributive justice and turnover intentions; to find out the significant effect of distributive justice on the dimensions of perception of politics and finally to find out the difference in perception of politics and distributive justice across demographics. Hypothesis was framed in accordance to the objectives stated. The tools of measurement adopted were (i) Perception of organisational politics were measured with the fifteen item Perception of politics scale (POPS), developed by Kacmar and Carlson (1997).( ii) Five item Perceptions of distributive justice were measured with the Distributive Justice Index, developed by Price and Mueller (1986). (iii) Turnover intention was measured using a categorical item developed by Dilys Robinson, Sarah Perryman, and Sue Hayday, (2004). The Crobachs alpha for perception of politics dimensions and distributive justice were above 0.90. The level of perception of politics and distributive justice was found to be moderate. In terms of the logistic regression analysis performed, it was found that there was partial mediation of perception of politics between distributive justice and turnover intention. The result indicated that, even though the employees perceived their work environment to be political, they will have the intention to stay back, as long as the fairness in distribution of rewards exists. Perception of politics which always carried a negative label showed partial mediation in the relationship between distributive justice and turnover intentions, where it explained only 13.9% of the intention to leave factor. This means, even when the environment is political, employees will stay back in the organization when they experience fairness in distribution of rewards. Keywords: Information technology, Organizational behaviour, Human resource management, Perception of politics, Mediation, Distributive justice, Turnover intention. -
Mediating Role of Financial Literacy in Relationship between Financial Stress & Financial Resilience among MSME in Bangalore
The outbreak of COVID-19 virus brought down the economies of various countries and the livelihoods of the public. World economy witnessed a lower amount of the economic growth. Indian economy also fared poor during the pandemic. The pandemic generated unemployment, job loss, pay cut, and closure of many business organizations in India. Unemployment and low income caused psychological stress and financial stress among the public and among the businessmen especially micro, and small entrepreneurs (MSES). The Indian economy is bouncing back to normalcy. MSES exhibit stronger resilience during the hard time. The study is interested to measure and analyse the determinants that promote financial resilience among the MSES in India. Based on existing literature, financial literacy is chosen to study the nexus between financial stress and financial resilience of the entrepreneurs. 2023, Indian Institute of Finance. All rights reserved.