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Coal-Based Fluorescent Zero-Dimensional Carbon Nanomaterials: A Short Review
Carbon nanomaterials (CNs) have fascinated material scientist owing to their outstanding properties, making them potential materials for numerous critical applications. Over the years, scientists have reported several techniques for the production of CNs from distinctive precursors using various top-down and bottom-up approaches. Coal is being proven as an inexpensive, abundant, and effective carbon source for harvesting CNs with unique characteristics, properties, and high production yield. CNs derived from coal exhibit excellent fluorescence property, which can be tuned by varying the degree of oxidation, particle size, surface functionalization, etc. The fluorescent coal-derived CNs are effective materials for label-free bioimaging and selective sensing applications. In this review, we encompass the synthesis of different kinds of CNs from coal, their fluorescence properties, proposed fluorescence mechanisms, factors affecting fluorescence property, and fluorescence sensing and bioimaging applications. 2020 American Chemical Society. All rights reserved. -
Vessel turnaround time reduction in ports: An automated lean approach
Vessel turnround time is a vital factor that determines the efficiency of ports and consequently the trade competitiveness of a country. The goal of this research is to identify the factors leading to vessel turnaround time and suggest methods to increase the operational effectiveness. The research involves gathering data, analysis of the procedures for documentation and cargo handling, analysing the historical turnaround time, the reasons or causes contributing to idle time, identifying the root causes and proposing a solution that could contribute to the reduction of turnaround time of vessel so as to improve the efficiency of port operations. Some identified factors that contribute to the idle time include inefficient cargo handling and loading and unloading process, delays in documentation and customs clearance procedures, unplanned maintenance or repairs of vessels, harsh weather conditions, insufficient coordination and communication between stakeholders involved. 2024 by IGI Global. -
Strengthening the Security of IoT Devices Through Federated Learning: A Comprehensive Study
There is a strong need for having an operative security framework which can help in making IoT (Internet of Things) devices more secure and reliable which can further protect from adversarial intrusions. Federated Learning, due to its decentralized architecture, has emerged as one of the ideal choices by the research practitioners in order to protect sensitive data from wide IoT-based attacks like DoS (Denial of Service) attack, Device Tampering, Sensor-Data manipulation etc. This paper discusses the significance of federated learning in addressing security concerns with IoT (Internet of Things) devices and how those issues can be minimized with the use of Federated Learning has been deliberated with the help of comparative analysis. In order to perform this comparative analysis, we investigated the published work in FL based IoT application for the last five years i.e., 2018-2022. We have defined a few inclusion/exclusion criteria and based on that we selected the desired paper and provided a comprehensive solution to IoT based applications using FL approach. Federated learning offers an optimistic approach to intensify security in IoT environments by enabling collaborative model training while preserving information privacy. In this paper a framework named Federated AI Technology Enabler (FATE) has been envisaged which is one of the recommended frameworks in safeguarding security and privacy measures of IoT devices. 2024 IEEE. -
Comparison of Various Types of Lubrication During Hard Turning of H13 Tool Steel by Analysing Flank Wear Using ANOVA
Hard machining of components has been a new attraction in the field of manufacturing, as it avoids the need for multiple cost inculcation processes for a single part. Hard machining attracts a wide attention to the researchers because of the usage of hard tools, tougher machinery and enormous quantities of cutting fluids. Optimized use of any of these functionaries can result in reduction of cost as well as safer and clean working environments. In this research new cutting fluid reduction processes were compared along with the use of hard metal inserts. These two methods suggest an enormous amount of cost reduction along with cleaner shop floor. Minimal quantity lubrication (MQL) and minimal cutting fluid application (MCFA) capacities in cutting fluid reduction as mentioned by various researchers in past two decades. These methods were compared in this research paper for finding out the best possible system. Flank wear is considered as a crucial parameter in hard machining as the wear rate affects other deserving product qualities such as surface finish and job profiles. In this research tungsten carbide coated hard metal inserts were used instead of conventional CBN or diamond tipped tools, which are of higher in price margin. The study comprised of Taguchis L9 orthogonal array, which was advised by previous researchers as good tool for optimisation. MQL and MCFA assisted experimentation were performed with same cutting conditions, which were then again compared with dry hard machining and wet machining. Influence of each input parameters where critically evaluated using ANOVA. The results revealed that a promising reduction in tool wear was noticed in MCFA assisted hard machining. 2020, Springer Nature Singapore Pte Ltd. -
Modelling, Temperature Analysis, and Mechanical Properties of Friction Stir Welding of Al-Cu Joints with Hardened OHNS Steel Tools
Friction stir welding (FSW) is a nearly modern welding method with vital advantages over the conventional welding process, such as lower distortion, enhanced mechanical properties, and eco-friendly. In FSW, the joint characteristics mainly depend on heat development during the joining process due to its solid-state joining method. The basic principles of thermomechanical methods during FSW are unknown since it is a new metal joining method. In this investigation, the 2D and 3D models of the tools with different pin forms were designed using SOLIDWORKS. The ANSYS software was used to investigate the temperature distributions near the weld zones. The fixture was designed and made according to the machine conditions. The base plates used were AA6101 and C11000; the tool material used was the Hardened OHNS steel tool with square and circular pin form. The temperature values were measured in each trial while joining of Al-Cu base plates along the weld line. The results reveal that in the joint area, a trial with high temperature leads to high ultimate tensile strength (UTS) and Charpy impact strength (CIS). Made at tool rotation speed 1200 rpm and feed velocity 20 mm/min of Hardened OHNS steel tool with circular pin form. The obtained UTS value at joints was less than that of Al and Cu base plates. The microhardness value detected at the joint area was higher than the Al and Cu base plates, providing high strength, and irregularly dispersed. 2022, Books and Journals Private Ltd.. All rights reserved. -
Optimization of friction stir welding parameters during joining of AA3103 and AA7075 aluminium alloys using Taguchi method
This paper investigates the optimization of input parameters for the friction stir welding of AA3103 and AA7075 aluminium alloys. The properties of base materials AA3103 are non-heat-treatable alloy, which is having good weldability while AA 7075 is having higher strength. Therefore, the welding of these aluminium alloys will produce superior mechanical properties. Friction stir welding is a rapidly growing welding process which is being widely used in marine, automobile and aerospace industries. Rather than its widespread use, this type of welding has several advantages over normal welding processes like low production of fume, no consumable electrodes are used and can be used in any position. In this paper, optimization of input parameters were conducted based on Taguchi method using the L9 orthogonal array. There were nine experimental runs in total after creating the L9 orthogonal array table in MINITAB software. The input parameters selected for optimization are tool rotation speed, feed rate, tool pin profile the output parameters which are optimized hardness, tensile strength, impact strength. The ANOVA analysis was carried out in the Qualitek 4 software to find out the percentage influence of input parameters on the output parameters. This research work was carried out to find the optimized condition to carry out friction stir welding of above mentioned aluminium alloys. 2021 Elsevier Ltd. All rights reserved. -
Optimization of cutting parameters and prediction of surface roughness during hard turning of H13 steel with minimal vegetable oil based cutting fluid application using response surface methodology
The manufacturing industries in modern era are competing to reduce cost of production by employing innovative techniques, one being hard turning. In hard turning process, the work piece is heat treated to the required hardness in the initial stage itself and near net shape is arrived directly by hard turning process. Hard turning reduces manufacturing lead time by excluding the normal cost incurring processes such as, turning, heat treatment, finish grinding etc. In this experimental investigation hard turning process is assisted with minimal cutting fluid application technique, which reduces cutting fluid usage to a minimum of 6-8 ml/min. Soya bean oil based emulsion was used to make the hard turning environment friendly. The oil was prepared by adding additives, which will enhance the desirable properties of the oil for hard turning. Response surface methodology was used for optimization of cutting parameters and for the prediction of surface roughness. A central composite design was implemented to estimate the second-degree polynomial model. The cutting parameters considered for experimentation were cutting speed, feed rate and depth of cut. The surface roughness was considered parameter for prediction. Surface roughness predicted by the response Surface Methodology matched well with the experimental results. Published under licence by IOP Publishing Ltd. -
Prediction of Friction Stir Welding Parameters Using Response Surface Methodology
The Friction Stir Welding (FSW) technique results in mixing and densification of weld joint in a more accurate and localized manner. FSW has been used to create a more significant weld with more structural integrity. In this research work, to join AA 3103 and AA 7075 was carried out. These alloys were preferred due to their wide variety of applications varying from aluminium fabrication to the aerospace industry. AA 7075, being a costlier metal, can be partially replaced with AA 3103, which can be economically justifiable for this research. The study tries to reveal the regression model by considering the FSW parameters like speed feed and offset. Various mechanical tests, impact tests and hardness tests were used for determining the most suitable weld joint. After conducting the tests, the results were analyzed using Minitab 18 software. The mathematical equations were derived out of Response Surface Methodology, which proved to be efficient. The report thus discusses the details in the analysis and study of FSW. 2023 American Institute of Physics Inc.. All rights reserved. -
A method for identification of restarted radio sources from large radiosurveys
Active galaxies hosting radio jets can exhibit distinct active phases marked by two sets of radio lobes. Typically, these episodic radio sources have been identified through morphological observations. In addition, spectral characteristics-based methods are also employed wherever multi-frequency deep radio observations are available. However, these methods are inefficient in detecting restarted radio sources that do not exhibit a clear morphology. To address this, a method of using the spectral curvature (SPC=?150MHz1400MHz-?74MHz150MHz) to identify restarted radio sources is presented. This is based on the fact that restarted radio sources with significant remnant emission are expected to have concave spectra in contrast to the convex or straight spectra observed in most radio sources. We use available wide area radio surveys in the range of frequencies from 74MHz to 1.4GHz to search for episodic radio sources and to shortlist 9,405 sources based on the criteria of SPC?0.5. The candidates thus identified can be followed up for detailed morphological and spectral index studies. This method will find application in the automated identification of episodic radio sources in large radio sky surveys from telescopes like LOFAR and SKA. Indian Academy of Sciences 2025. -
Cyber-Threat Landscape in Healthcare Industry and Legal Framework Governing Personal Health Information in India
2021 and 2022 have been the years of frequent cyberattacks. India remains in the top 25 countries severely affected by the continuous cyber-attacks and tops the list. The healthcare department is amongst the most affected area. In 2020, the healthcare department suffered a severe impact with around 348K cyber-attacks alone on Indian healthcare infrastructure. The recent occurrence of cyber-attack on AIIMS hospital in December 2022 followed by several other incidences of data breaches have made the concerned authorities pro-active on exercising vigilance and reforming the legal and technical system to protect the health infrastructure. This paper has been developed on extensive literature and focuses on describing the nature of electronic health records, the risks they are exposed to along with as to why they are so susceptible to these cyber-risks. Furthermore, the paper also deals with different kinds of threats affecting the privacy and security of electronic health records specifically. The paper analyzes Indian legal framework, briefly compares it with international legal framework (specifically US & EU) and highlights the shortcomings in Indian legislative framework followed by laying down certain recommendations primarily highlighting the possible changes required in Indian legal framework and practices that can be adopted at organizational level to overcome and mitigate such risks. N. Raizada, P. Srivastava, 2024. -
Extreme photometric and polarimetric variability of blazar S4 0954+65 at its maximum optical and ?-ray brightness levels
In 2022 the BL Lac object S4 0954+65 underwent a major variability phase, reaching its historical maximum brightness in the optical and ?-ray bands. We present optical photometric and polarimetric data acquired by the Whole Earth Blazar Telescope (WEBT) Collaboration from 2022 April 6 to July 6. Many episodes of unprecedented fast variability were detected, implying an upper limit to the size of the emitting region as low as parsec. The WEBT data show rapid variability in both the degree and angle of polarization. We analyse different models to explain the polarization behaviour in the framework of a twisting jet model, which assumes that the long-term trend of the flux is produced by variations in the emitting region viewing angle. All the models can reproduce the average trend of the polarization degree, and can account for its general anticorrelation with the flux, but the dispersion of the data requires the presence of intrinsic mechanisms, such as turbulence, shocks, or magnetic reconnection. The WEBT optical data are compared to ?-ray data from the Fermi satellite. These are analysed with both fixed and adaptive binning procedures. We show that the strong correlation between optical and ?-ray data without measurable delay assumes different slopes in faint and high brightness states, and this is compatible with a scenario where in faint states we mainly see the imprint of the geometrical effects, while in bright states the synchrotron self-Compton process dominates. 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. -
Early strength of concrete amended with waste foundry sand - A potential for early open to traffic (EOT) pavements
The most predominant and widely practiced methods for waste disposal are Landfill, Incineration, and composting. There is a scarcity of land for waste disposal and because of increasing land cost, recycling and utilization of industrial by-products and waste materials has become an attractive proposition to waste disposal. There are several types of industrial by-products and waste materials. The utilization of such materials in concrete not only decreases the overall cost of construction but also helps in reducing disposal concerns. One such industrial by-product is waste foundry sand (WFS). The annual production is about 3 million tons from different industries in India. In the metal casting process, foundry industries dispose of huge quantities of waste sand into landfills, causing a harmful impact on the environment. The silica-based spent foundry sands from iron, steel, and aluminum foundries are evaluated in the risk assessment. This paper mainly focuses on achieving concrete for EOT (Early Open to Traffic) rigid pavements with WFS along with the use of accelerator and super-plasticizer. Effects of WFS on concrete properties such as compressive strength and split tensile strength are presented. Two types of mix proportions were investigated in this study. FDOT (Florida Department of transportation) and IRC (Indian Road Congress) recommendations were adopted for mix proportions using 5% & 10% of WFS replaced partially for M-Sand. 1-day compressive strength for FDOT mix with 10% WFS was 30MPa & for IRC mix with 10%, WFS was 20?MPa. The 3-days strength for mixtures with 10% WFS was 45MPa & 47MPa for FDOT & IRC mix proportions, respectively. Though the strength decreased with the inclusion of WFS, the 1-day and 3-days strength achieved for mixtures with 10% WFS surpassed the minimum strength requirements as per the slab replacement guidelines. Normally the pavement will be open to traffic after three to four days of laying asphalt, this method of using foundry sand enables the pavements to be open to traffic inless than a day. 2023 Author(s). -
Customer relationship management system and method of taking feedback thereof /
Patent Number: 202241008325, Applicant: Dr. Rashmi Rai.
A customer relationship management system (1) and method of taking feedback thereof comprising a feedback button (2), a mobile application (2A), an electronic unit (4), a computer (5), a mobile (6), a network (7), a server (8), a database (9). The invention provides a feedback button may be a physical three-way button (2) or a three-way digital button. One of them is visible on mobile applications and the second one is visible in the room. -
Healthy healthcare systems in India: A prognosis
India has been an emerging economy which has retained its second position in the global healthcare market that has been tackling its economic gaps, shifting demographics, thereby, facing a wide gap between the demand and supply of healthcare products and services due to technology and increasing cost. Affordable treatment facilities for the economically low strata is still a dream. The government scheme of "Swachh Bharat Abhiyan" and "Ayushman Bharat Yojna" are the steps to uplift the backward community and make all the facilities available to them at the lowest possible cost directly and indirectly. Hence, the objective of this research was to unfold the three pillars of Healthy Healthcare which revolves around healthcare systems in India, Healthcare Employees' wellbeing and resultant patient outcomes. This research also tried studying various interventions that can be taken to improve the present scenario of affordable and quality service to the needy people. Springer Nature Switzerland AG 2020. -
Dimensions of occupational stress impacting turnover intentions amongst BPO employees: An empirical study
Nowadays, many organizations are confronted with the problem of higher level of employee turnover that brings higher replacement costs to these companies. Especially analysing the current situation in the BPO Industry, it is observed that the turnover intention of call centre employees is greater than its expected level and has become a major threat to their existence. Job stress is one of the major factors which tremendously influences this problem. This study mostly focused upon the impact of job stress (JS) on employee turnover intention (Tl) of call centre employees in the BPO industry. Eight five respondents participated in the study. The study was carried out using the survey method. For the survey, the standardized questionnaire of Osipow (1998) for occupational stress and Rajkumar and Karthik Sridar (2015) for turnover intentions were used. The results revealed that scope of occupational stress, that is, role uncertainty/ambiguity, role boundary, role responsibility, and the physical environment had a substantial significant impact on turnover intentions of employees. The dimensions of occupational stress, that is, role insufficiency and role overload had a slight impact on turnover intentions of employees. The regression model stated that there was dependency between occupational stress and turnover intentions. The study suggested that empowerment should be provided at the workplace so that the employees can minimize their inter role distance and can increase job involvement. To make a productive workforce, the sub - variables of job stress like role stagnation, role isolation, and role overload should also be minimized by working more on the person-organization-fit at the time of recruitment and selection. -
CONSUMER BUYING PSYCHOLOGY AND BRAND PERCEPTION: INFLUENCE OF WORD OF MOUTH COMMUNICATION
Word-of-mouth Communication (WOM) has recently gained momentum in almost every operating industry in the world. WOM can be seen as a firms intentional influencing of consumer-to-consumer communications about the firms products. This studys primary objective was to determine whether there was any significant relationship between Word-of-mouth communication and Consumer buying behaviour specificity to the Indian cosmetics industry. The study was conducted with a sample size of 163 women, hailing mainly from South Indian cities, out of which Bangalore was predominant. The results of this study are to the Indian urban/metro population. The research eventually concluded a significant correlation between WOM and Consumer buying Behaviour, wherein consumer behaviour was measured in terms of Brand Perception, Search & Evaluation effort, and Risk Reduction. WOMs correlation with each of these aspects was positive and high, indicating a direct and strong relationship. 2020. All Rights Reserved. -
Revisiting the efficacy of policies in the Indian primary healthcare sector: Interventions and approaches during the COVID-19 pandemic
The COVID-19 pandemic has wracked even the most modern healthcare systems worldwide and has influenced Indias healthcare sector and vastly affected the governments and corporate stakeholders healthcare reform plans; hence, this chapter is intended to unfold the paradigm shift in Indias primary healthcare industry due to the pandemic in the last one and half years. This chapter described Indias experience with the coronavirus during the first and second waves and tried examining the public health difficulties in the COVID era. It provides a timeline of significant events of the pandemics growth in India and worldwide and how India responded to the situations through their economic and healthcare policies. We also go through some of the pandemics impacts and Indias recovery approach and strategies for its revival. All possibly available secondary data like Scopus, Web of Science, Medline/PubMed, and Google Scholar search engines, newspapers, government websites, etc., were excavated to meet this purpose; secondary sources were used to analyze the data. This chapter also examined the effect of COVID-19 on healthcare workers in India. This chapter critically examined the primary healthcares role during this pandemic and the governments policies and processes to deal with COVID-19 and any other unforeseen situations which the country may encounter in the future. 2022 Elsevier Inc. All rights reserved. -
An invisible race from exclusiveness to inclusiveness of queer employees at workplace
Queer theory has been a significant part of the field of queer studies. Its presence can be found in women's studies, gay and lesbian studies and feminist theory, and postmodern and poststructuralist theories. Many types of research came around during the 1990s. One of the significant studies was in 1991. Teresa de Lauret coined the term "queer theory" to characterize a school of thought that rejected heterosexuality and binary gender constructions favoring a more open view of identity. Michel Foucault and Judith Butler's study is widely regarded as the founding text of this philosophy. This study adopts the lens of gender and sexuality to challenge people's cultural norms and ideals. There is hesitation among people regarding the acceptance of the third gender that exists in society. The queer theory suggests how the rest sees the queer community of the world. While studying the conditions of the queer community in India, it is imperative to undertake the recently legalized Section 377. The Indian Penal Code says that it is no more a crime to have sexual conduct between adults of the same gender as people have no control over their sexual orientation. The study discusses the practices and protocols of transgender inclusion at the workplace and how to look beyond the labels of the LGBT community. There are various issues when the company wants to employ transgender people at the workplace and accept the community. Qualitative research methods will be used in this research by reading several databases and conducting a systematic review. This chapter will also highlight how trans people confront significant job and career-related problems and barriers in the workplace and the concessions employers should make to ensure that trans people have a safe and discrimination-free workplace. This chapter observes how queer theory can be used as a conceptual framework to advance research in organizational research on trans people's several and many times conflicting needs. Ways could be explored to reach their goals around gender transgression and congruency, work, and career, by laying out some of the crucial concepts associated with the study of trans people in the workplace. The Author(s), under exclusive license to Springer Nature Switzerland AG 2022. -
Migrants and homelessness: Life on the streets in urban India
There has been division and segregation of urban spaces and homeless migrants highlighting urbanization's contradiction. Despite being unseen, they make up a sizable portion of urban population. Being homeless in the city is a case of minimum citizenship, devoid of the right to the city, and is subject to ongoing violence. The expanding claim for the citizen's right to various public areas like pathways, pavements, and parks challenges their very existence on the streets and sidewalks (where they live). How do they perceive the hatred and disinterest of the wealthier classes? What uneasiness does the politics being played out in the name of locals against migrants create? The study will also examine the country's approach to the homeless, including their access to housing and sources of income. The Indian government has taken some steps to address homelessness among migrant workers, including providing financial assistance and setting up temporary shelters. Still, more needs to be done to address the root causes of this issue and ensure that migrant workers have access to safe and affordable housing, healthcare, and employment opportunities. This chapter plans to investigate issues, including how frequently migrants who are homeless experience violence and humiliation. It would analyze the macromicro paradox of the dynamics of migration. As the invisibleness and neglect of migrants frequently coincide with a widespread belief that migration must be reduced, this has obvious policy implications and implications for the inclusive growth model. In addition to that, this chapter has analyzed the country's policies on the homeless and their livelihood. The data was collected from secondary sources, and extensive study was conducted on various literature available from multiple databases. 2024 Elsevier Inc. All rights are reserved. -
Unraveling the Interplay Between Indian Agricultural Sector, Food Security, and Farms Bill: Key to Sustainable Development Goals
Agriculture, along with its allied sectors, plays a significant role in the economic progress and expansion of any country; despite tremendous economic progress, Indias agriculture sector is in jeopardy for various reasons. Agriculture in rural areas has been the primary source of income for the poor. With the growing susceptibility, policymakers main problems are to design ways to promote sustain-able agriculture to achieve the Sustainable Development Goals (SDGs). The Sustain-able Development Goals emphasize the relevance of agriculture and the need to revi-talize agribusiness worldwide by aiding farmers, increasing investments in research, technology, and market infrastructure, and increasing knowledge sharing. It may lead to spur innovation and give farmers more power. One of the essential advantages of urban agriculture is its potential to boost social capital and civic participation in low-income neighborhoods. As a result, the most critical goal in agricultural develop-ment for food security should be to raise productivity and diversify food production. Diversification of crops should be encouraged among farmers. This would aid in the fight against starvation, but it would also assist in preventing biodiversity loss and strengthen farmer resilience. Hence, our Chapter attempts to analyze the poor food security and what strategies will contribute to the SDG goals to reduce hunger in India as well worldwide. It elucidates a variety of obstacles and opportunities for successful, sustainable, and resilient agriculture. It also covers topics such as the recent agricultural bill and its long-term implications for our growth and a few important takeaways that could help us get closer to our objectives, mainly through the application of technology. The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.