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CovalentOrganic Frameworks (COF): An Advanced Generation of Reticular Organic Polymers for Energy and Environmental Applications
Over the past decade, nanoporous materials have caught strong attention among the scientific community due to their tremendous potential in real-world applications. This chapter introduces one such group of nanoporous materials called Covalent Organic Frameworks or simply COFs. Here, we briefly covered the overview of synthesis of COFs and their post-synthetic modifications employing different linkages boron, imine, triazine linkages, etc. High porosity with adjustable periodic pores, well-defined structures, and tunable skeletons are some of the key properties of COFs. In account of such advantages COFs have been scientifically researched in applications like adsorption, separation, energy storage devices, sensing, and especially in degrading various pollutants like heavy metals As, Cd, Cr, Cu; radionuclides UO 2 2+, TcO 4 ?, Nd 3 +, I 2; organic waste dyes, pharmaceutical waste, organo-phosphorous retardants, etc. This chapter specifically describes the current advancement of COFs in segregating hazardous chemicals by sorption methods. One such example is heavy metal sorption in trace amounts from water which otherwise can pose a great threat to human health if not removed completely. Some of these ions include UO 2 2+. By utilizing weak chemical interactions for dye confinement within COF pores, industrial sewage water can be made dye free. ?-conjugated backbones found in aromatic COFs could function as a signal transducer, or active functional groups evenly spaced could act as a receptor, and the uniform pores can serve as mass transfer inducer/enhancers. As a result, COFs can facilitate facile and smooth ion transport by the virtue of redox activities within COF pores. This makes COF a robust and efficient material for energy applications particularly in designing batteries and supercapacitors. Thus, COFs could act as a potential electrodes both anode and cathode for energy storage devices. The current chapter also highlights the development in the field of environmental applications using COF materials. In a nutshell, this chapter gives the reader an idea about many fold advantages of COFs in the energy and environmental sector to combat rising environmental concerns and energy demands. 2025 WILEY-VCH GmbH, Boschstra 12, 69469 Weinheim, Germany. All rights reserved. -
Covert Conditioning for Persistent Aggressive Behaviors: A Case Illustration
In psychotherapy practice and training, single case study design plays an indispensable role by effectively articulating the application of textbook knowledge, thereby bridging the gap between theory and practice. This article, on similar lines, illustrates one such successful example of the application of the classical behavioral technique of covert conditioning modified with a component of verbal challenging. A woman in her late-thirties reported with long-standing seemingly-resistant-to-treat symptoms of aggressive behavior of beating children. The client had a total of 10 daily sessions of 6090 minutes each. By the end of one week, she reported not beating children in this period. She felt extremely relieved because it had happened for the first time in 10 years. The intensity of anger had decreased drastically, and she was not shouting any longer. She had to discontinue sessions abruptly due to unavoidable circumstances. Although she was suggested to follow up the intensive sessions again, she was not able to do it due to feasibility issues. The improvement was maintained on follow-up visits after two weeks, four weeks, and three months. 2021 The Author(s). -
COVID 19 fatalities burden in Asian countries: An analysis of pattern and determinants
Covid 19 pandemic has severe implications on health and life of people. Asia being the most populous region has higher fatalities burden. Health infrastructure, stringent preventive measures by the government and public participation through adhering to social distancing have influence to check on fatalities' burden. The level of Social capital as well as voters' participation in a particular country can have influence on containment of COVID cases and fatalities. In this context, the main objectives of this study are to analyse pattern and trend of death burden for 45 Asian countries and impact of stringency measures by government, and voters turnout ratio on death burden. However, for regression analysis only 32 countries are taken into account considering the availability of data for all variables. Multiple linear regression analysis is employed in a cross-sectional framework and Ordinary least square estimation technique with heteroscedastic adjusted standard errors have been used for estimation of coefficients. The results show that southern Asia contributes the highest share of fatality cases in total fatality cases of Asia with 71.43% share. It also has the highest share of confirmed cases in total confirmed cases of Asia with 71.72%. However, when we take the population into account, Western Asia leads in the share of confirmed COVID-19 cases and its associated fatality cases per million populations in Asia as compared to other Asian regions. The factors like health infrastructure and voters turnover ratio are found to be significant and potential in reducing the new deaths per million populations. Though the coefficient of Stringency index has been negative and it did not emerge to be significant in Asian countries. The COVID related fatalities in Asian region are urban centric and urbanization proxy is found to be positive and significant. Diabetes prevalence rate has some heterogeneous result and in the present study its coefficient is not in the hypothesized direction. The Countries should ramp up health infrastructure and necessary preparedness to deal with the subsequent waves and COVID related fatalities. Importance need to be given people's participation and their shared responsibilities in dealing with COVID cases and checking on fatalities. The realisation of social responsibility among the masses can lead to community participation and adhering to the protocols imposed by the government and helps in checking on spread of virus and associated death. 2022 The Author(s) -
Covid related distress and its impact on mental health a study based on early and late adolescents in Bangalore
The closure of educational institutions and social distancing norms have impacted the life of adolescents. Forced to stay at home, limited interaction with friends and online schooling are some of the factors that have affected their lives. While some researchers believe that the true extent of the impact on the mental health of the adolescent is still not clear, others propose that the impact will only be observable in later stages of their life. In an attempt to understand the impact of the COVID related distress factors on the mental well being of adolescents, the current study collected data from 100 early adolescents and 100 late adolescents. The COVID related distress factors were measured through an instrument designed for the same, while mental well being was measured through depression symptoms and general anxiety levels. The finings of the study identify the particular distress factors that have a significant impact on the mental well-being of adolescents. The findings also identify the factors that are significant in predicting the mental well-being of each category, separately. 2023 -
Covid stimulating organic food consumption: Exploring factors of consumer buying behaviour
The outburst of coronavirus pandemic has forced people to rethink about their eating habits, what do they eat, where they get their food from, and how the food is produced, stored, and prepared. Statistics confirms that there is a significant growth in awareness level for organic foods in the global market. The purpose this study is to explore the factors leading to the perception and attitude for the purchase of organic/healthy food in the immediate context of food crisis in India. The questionnaire was used to implement the study and data was gathered from 387 respondents from the Delhi NCR, India. Exploratory factor analysis and confirmatory factor analysis were used for the data analysis. The finding reveals eight factors named as natural content, nutritional content, sensory appeal, environmental concern, attitude, lifestyle, perceived value and purchase intentions, leading to consumption of organic food. These results reflect the shift in nutritional content and natural content are the two most important variable leading to organic food consumption. 2021 Ecological Society of India. All rights reserved. -
Covid-19 and indian commerce: an analysis of fast moving consumer goods (Fmcg), and retail industries of tomorrow
Introduction: This paper examines the effect of COVID-19 on Fast Moving Consumer Goods (FMCG) and Retail industries of India and examines emerging trends in these markets. Background: COVID-19 has impacted our lives from all the fronts. Businesses and Global Commerce will never be the same once the world restarts post COVID-19. Multiple new trends like Direct to Consumer model(D2C), Omnichannel fulfilment, etc. would emerge in the industries of tomorrow. Macroeconomic Dynamics, consumer behaviour and supply-side disruptions form a complex network that drives these trends in the economy. This network has to be studied to proactively identify the emerging trends in the industry. Methods: Existing literature on COVID-19 and its effect on business and commerce in India were retrieved through secondary research. The retrieved literature was analyzed to identify emerging trends. Conclusion: Emerging trends in FMCG and Retail industry suggest that the previously existing layers of wholesalers, distribu-tors, etc. between the producer and the end consumer is being eliminated. Companies are leveraging technology to achieve direct distribution and thus, are getting closer to the customer. 2020 Global Research Online. All rights reserved. -
COVID-19 and Mental Health of Indian Youth: Association with Background Variables and Stress
The coronavirus has become a public health concern of the decade, affecting the economic, social, and psychological stability of the whole world. Having understood the detrimental impact of the pandemic to the mental health of people of all age groups, youth is understood to be the most vulnerable population who receives its direct impact. The broad objective was to study the mental health status of Indian youth and its association with various demographic variables. Psychological stress and mental health was another relationship that was explored. A group of 317 participants between the age group of 19 to 29 voluntarily took part in the online survey. Gender was found to be associated with overall mental health status (p < 0.01) as well its correlates, namely anxiety (p < 0.05), depression (p < 0.05), and loss of behavioral control (p < 0.01). Association between age and loss of positive affect (p < 0.05), number of siblings and loss of behavioral control (p < 0.01), and family environment and overall mental health scores (p < 0.001) were found. Similarly, feeling of restlessness during lockdown (p < 0.001), availability of support (p < 0.001), and feeling the need to consult a mental health professional were associated with the overall mental health score as well as all its sub-scales. Further, there were strong negative correlations between psychological stress and overall mental health scores, as well as that of anxiety, depression, and loss of behavioral control and positive affect sub-scales. The study highlighted the need for psychological support services for the youth population of the country to cope with and adapt to the new situation. The Editor(s) (if applicable) and The Author(s), under exclusive license to Taylor and Francis Pte Ltd. 2022. -
Covid-19 and Quad's Soft Reorientation
Quadrilateral Security Dialogue comprises a group of countries the US, Japan, Australia, and India, that started maritime collaboration in the wake of the 2004 Indian Ocean Tsunami. The initiative lasted for a brief period before falling apart in 2008. The countries re-banded together in 2017 to consult on ensuring greater security and prosperity in a free and open Indo-Pacific region, and a rules-based order. During the Covid-19 pandemic, the group has been partnering on soft security aspects such as vaccine development and distribution. The paper suggests that this allows the group to become first movers in the areas of specific functional challenges. This paper looks at the role of health diplomacy in the region as a soft power tool. The theory is based on the works of Professor Joseph Nye who first coined the term 'soft power'. It focuses on the role of India in strategic altruism to enhance Quad's strategic influence in the region. Expanding global vaccine supply is an example of reaching out to low- and middle-income countries. The paper argues that enhancing such cooperative mechanisms will allow Quad to balance its cooperative and competitive outlook in the region, linking its security with prosperity and development objectives. 2021 -
Covid-19 and school management
The breakout of COVID-19 from Wuhan, China has shaken the world economy, giving a traumatic experience to people across the world. Most of the countries have locked down their business enterprises. Schools have started teaching online, and teachers have moved to online teaching in no time. School managers are making quick decisions on various challenges faced by their schools. These uncertain conditions have led to the present study. The present study explores the impact of COVID-19 on various dimensions of school management, such as finance, infrastructure, staff training, student enrollment, student retention, student welfare activities, co-curricular activities, and challenges and opportunities; how to maintain efficiency amidst COVID-19 pandemic; and how to reduce the pandemic effect in schools. This research employed the phenomenological qualitative method to address the research problems. The data was collected from the semi-structured online interview and review of related literature. The study describes the effect of COVID-19 on various dimensions of school management. 2022, IGI Global. All rights reserved. -
COVID-19 and stress of Indian youth: An association with background, on-line mode of teaching, resilience and hope
Background: COVID-19 pandemic causes serious threats to physical health and triggers wide varieties of psychological problems, including anxiety and depression. Youth exhibit a greater risk of developing psychological distress, especially during epidemics influencing their wellbeing. Objectives: To identify the relevant dimensions of psychological stress, mental health, hope and resilience and to examine the prevalence of stress in Indian youth and its relationship with socio-demographic information, online-mode of teaching, hope and resilience. Method: A cross-sectional online survey obtained information on socio-demographic background, online-mode of teaching, psychological stress, hope and resilience from the Indian youth. A Factor Analysis is also conducted on the recompenses of the Indian youth on psychological stress, mental health, hope and resilience separately to identify the major factors associated with parameters. The sample size in this study was 317, which is more than the required sample size (Tabachnik et al., 2001). Results: About 87% of the Indian youth perceived moderate to a high levels of psychological stress during the current COVID-19 pandemic. Different demographic, sociographic and psychographic segments were found to have high stress levels due to the pandemic, while psychological stress was found to be negatively correlated with resilience as well as hope. The findings identified significant dimensions of the stress caused by the pandemic and also identified the dimensions of mental health, resilience and hope among the study subjects. Conclusion: As stress has a long-term impact on human psychology and can disrupt the lives of people and as the findings suggest that the young population of the country have faced the greatest amount of stress during the pandemic, a greater need for mental health support is required to the young population, especially in post pandemic situations. The integration of online counselling and stress management programs could assist in mitigating the stress of youth involved in distance learning. 2023 The Author(s) -
COVID-19 and students perception about MOOCs a case of Indian higher educational institutions
Purpose: The purpose of this paper is to understand the outcomes of Massive Open Online Courses (MOOCs) in the light of COVID-19 concerning the students of higher educational institutions (HEIs) in India. The COVID-19 has disrupted the normal teaching-learning role across the world and has put everyone in a nightmare. HEIs are now requesting students to take up MOOCs to explore and attain knowledge and the same is even followed by the corporate institutions. MOOCs are one of the crisis management solutions to ensure that education is continuous and not disrupted. Design/methodology/approach: The data included in this research has been collected from students of HEIs across India using a convenient sampling method. The collected data was exposed to a factor analysis using a principal component analysis (PCA) technique to reduce multiple dimensions. Findings: The various stakeholders such as the government, HEIs and the MOOC providers have to play a crucial role in developing intellectual human assets for the nations growth and progression by extending flexible and cost-effective learning facilities. Education should be free to boost up the learning motivation, and hence it is the responsibility of the stakeholders to provide few courses free of cost, which will increase the rate of enrolment and student participation. Research limitations/implications: From the research, it is well understood that MOOCs are useful to keep oneself updated with the market and industry trends especially when the world is focusing on business analytics, artificial intelligence and other technologically driven topics and concepts. Practical implications: The present study contributes to the growing body of evidence that MOOCs play an important role in providing flexibility in learning. In the future, if there are similar crisis, which will disrupt education, then the best alternative will be MOOC through which many stakeholders will benefit. Education should be free to boost up the learning motivation, and hence it is the responsibility of the stakeholders to provide few courses free of cost, which will increase the rate of enrolment and student participation. Social implications: Education is a service for the society which will have a long-term positive impact on improving the standard of living of the people. Hence, MOOCs can be one of the educational elements to provide learning opportunities to all age groups. Originality/value: This study has explored the perception of MOOCs among the students of HEIs in India in the COVID-19 pandemic. The fresh data collected from the students is a reflection of their experiences during the COVID-19 lockdown. Indeed, it is quite surprising to know that majority of the respondents have arranged to learn during the pandemic, which shows the thirst and urge to learn. Digital technology and tools are welcomed and accepted by the student community. 2020, Emerald Publishing Limited. -
COVID-19 and the cry of the poor sensitivity and solidarity
[No abstract available] -
COVID-19 and the world with co-morbidities of heart disease, hypertension and diabetes
Newly emerging severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causing coronavirus disease 2019 (COVID-19) pandemic has now spread across the globe in past few months while affecting 26 million people and leading to more than 0.85 million deaths as on 2nd September, 2020. Severity of SARS-CoV-2 infection increases in COVID-19 patients due to pre-existing health co-morbidities. This mini-review has focused on the three significant co-morbidities viz., heart disease, hypertension, and diabetes, which are posing high health concerns and increased mortality during this ongoing pandemic. The observed co-morbidities have been found to be associated with the increasing risk factors for SARS-CoV-2 infection and COVID-19 critical illness as well as to be associated positively with the worsening of the health condition of COVID-19 suffering individuals resulting in the high risk for mortality. SARS-CoV-2 enters host cell via angiotensin-converting enzyme 2 receptors. Regulation of crucial cardiovascular functions and metabolisms like blood pressure and sugar levels are being carried out by ACE2. This might be one of the reasons that contribute to the higher mortality in COVID-19 patients having co-morbidities. Clinical investigations have identified higher levels of creatinine, cardiac troponin I, alanine aminotransferase, NT-proBNP, creatine kinase, D-dimer, aspartate aminotransferase and lactate dehydrogenase in patients who have succumbed to death from COVID-19 as compared to recovered individuals. More investigations are required to identify the modes behind increased mortality in COVID-19 patients having co-morbidities of heart disease, hypertension, and diabetes. This will enable us to design and develop suitable therapeutic strategies for reducing the mortality. More attention and critical care need to be paid to such high risk patients suffering from co-morbidities during COVID-19 pandemic. 2020 Journal of Pure and Applied Microbiology. All rights reserved. -
Covid-19 Classification and Detection Model using Deep Learning
One of the deadly diseases in recent years is covid19 which is affecting the lives of peoples. Also leading to severe adverse problems and death. Prevention is done using early diagnosis and medication which in turn helps in early detection of the disease. The basic aim of the paper is to identify and further classify the patients using the chest x-rays. From scratch the Convolutional Neural Network is diagnosed producing a very high accurate and optimum results. In recent years, researchers found out that in the radiological images such as like x-rays, the traces of covid-19 can be found. In few areas, a good accuracy of the covid-19 detection cannot be achieved due to lack of the people who test so the artificial intelligence is combined with the radiological image. In machine learning the models used are deep learning by automatizing the actions and making it certain by swift, skillful and proficient outcome produced by the chest images provided by the patients. There are several layers like convolutional layer, max pooling layer etc. which are initiated and are used with aid of ReLU activation function. These images given as inputs are also classified accordingly. There is a sequence of neurons being given as input to the active dense layer and there is a result to the input by a sigmoidal function. There is a rise in efficiency because the models are trained and there is a decline of loss at the same time. If there is a model where fitting is done earlier to the overfitting and is restricted from implementing in the data augmentation. There is a better and efficient involvement of suggestions to models of deep learning. Further there is a classification of chest images for identifying and analyzing covid19. So, to check the Covid detection, the images are used as raw. In this paper a model is proposed to have good accuracy in the classification between Covid and normal and further it can be classified into three categories like Covid, pneumonia, normal. There is a 98.08% for the first one and 87.02% for the second one. By introducing 17 convolutional layers and using the Darknet model used for classifying you only look once (YOLO) for the live identification of the objects and multiple layers of filters are used. In the model there is an initial screening. 2022 IEEE. -
Covid-19 ct lung image segmentation using adaptive donkey and smuggler optimization algorithm
COVID'19 has caused the entire universe to be in existential health crisis by spreading globally in the year 2020. The lungs infection is detected in Computed Tomography (CT) images which provide the best way to increase the existing healthcare schemes in preventing the deadly virus. Nevertheless, separating the infected areas in CT images faces various issues such as lowintensity difference among normal and infectious tissue and high changes in the characteristics of the infection. To resolve these issues, a newinf-Net (Lung Infection Segmentation Deep Network) is designed for detecting the affected areas from the CT images automatically. For the worst segmentation results, the Edge-Attention Representation (EAR) is optimized using Adaptive Donkey and Smuggler Optimization (ADSO). The edges which are identified by the ADSO approach is utilized for calculating dissimilarities. An IFCM (Intuitionistic Fuzzy C-Means) clustering approach is applied for computing the similarity of the EA component among the generated edge maps and Ground-Truth (GT) edge maps. Also, a Semi-Supervised Segmentation (SSS) structure is designed using the Randomly Selected Propagation (RP) technique and Inf-Net, which needs only less number of images and unlabelled data. Semi-Supervised Multi-Class Segmentation (SSMCS) is designed using a Bi-LSTM (Bi-Directional Long-Short-Term-memory), acquires all the advantages of the disease segmentation done using Semi Inf-Net and enhances the execution of multi-class disease labelling. The newly designed SSMCS approach is compared with existing U-Net++, MCS, and Semi-Inf-Net. factors such as MAE (Mean Absolute Error), Structure measure, Specificity (Spec), Dice Similarity coefficient, Sensitivity (Sen), and Enhance-Alignment Measure are considered for evaluation purpose. 2022 Tech Science Press. All rights reserved. -
COVID-19 Effects on Learning Behaviour of Tourism Students for Sustainable Education: The Malaysian Context
According to the World Health Organization (WHO), the alarming spread of coronavirus (COVID-19) began to shock the world on 31 December 2019, and it was first detected in Wuhan, Hubei, in China when a patient presented with pneumonia. To date, the virus has recorded over 2,088,663 cases worldwide. The impact of COVID-19 would be precisely worrying as it aggravated not only tourism but also the learning behaviour of tourism students. What are the effects of the COVID-19 pandemic on the learning behaviour of tourism students? What lessons could be learned to make it more sustainable for the students? And finally, what would be the suggested resilient strategies for the tourism students in the post-pandemic era? There is no original study conducted to focalise investigation on revealing the negative characteristics of COVID-19 and the learning curve of university students in Malaysia. However, the main objectives of this chapter are to provide an overview of the effects of COVID-19 in the learning behaviour of tourism students for sustainable education and the factors that distress students minds and how these helped students to share the positive aspects with others. It is gradually visible that the effects of COVID-19 on learning behaviour and dangers to university students in Malaysia and their significance on students emotional change or learning behaviours are not well perceived. This chapter recommends that educational institutions produce studies to proliferate and document the pandemics impact on the educational system. It is crucial for tourism students for sustainable education in the current time. 2023 Priyakrushna Mohanty, Anukrati Sharma, James Kennell and Azizul Hassan. -
COVID-19 in pregnant women and children: Insights on clinical manifestations, complexities, and pathogenesis
Pregnancy changes the body's immune system to counteract the spectrum of infections, including COVID-19, which can pose complications. Pregnant women are less likely to contract COVID-19 infections than the general public. However, pregnant women are at slightly increased risk of becoming severely unwell if they do catch COVID-19, and congenital conditions in pregnant women may worsen the state of infection and lead to critical stages and even mortality. The possibility of vertical transmission has been reported in only a few cases of COVID-19; however, it was not noted in cases of SARS and MERS. Vaccination coverage in pregnant women remains a challenge. Children are the next suspected and vulnerable population to acquire infection after the first and second waves. Children are disproportionately infected compared with older populations, but the severity of infection is less compared to adults. This review highlights the complexities of COVID-19 in pregnant women and the underlying reasons why children tend to be comparatively less severely affected. Ethnicity, nutrition, lifestyle, and therapeutics influence the severity of infection in children. Low expression of angiotensin-converting enzyme 2 receptors, indigenous virus competence, and maternal immunity is the first-line defense for children against COVID-19. Habituating herbal medicines from childhood may help support a robust and defensive immune system to counteract novel antigens and encourage healthy generations. 2021 International Federation of Gynecology and Obstetrics -
COVID-19 outbreak prediction using quantum neural networks
Artificial intelligence has become an important tool in fight against COVID-19. Machine learning models for COVID-19 global pandemic predictions have shown a higher accuracy than the previously used statistical models used by epidemiologists. With the advent of quantum machine learning, we present a comparative analysis of continuous variable quantum neural networks (variational circuits) and quantum backpropagation multilayer perceptron (QBMLP). We analyze the convoluted and sporadic data of two affected countries, and hope that our study will help in effective modeling of outbreak while throwing a light on bright future of quantum machine learning. The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021. -
COVID-19 pandemic and preparedness of teachers for online synchronous classes
COVID-19 pandemic has forced educational institutes to shut down, and teachers are compelled to adopt technology ardently so that the teaching-learning process does not suffer. Gradually, it is being realised that synchronous online classes are required to enhance the teaching-learning experience. The major challenge in India is the lack of preparedness of the teachers, as most teachers have little experience with technology. Nevertheless, they have to adapt themselves quickly. However, to effectively use technology for synchronous online teaching, teachers have to be technology ready and proficient with utilising the platform used for online classes. This study attempts to understand the impact of teachers preparedness on the use of online platforms for synchronous teaching during the COVID-19 pandemic. This paper integrates the technology readiness index (TRI) and technology acceptance model (TAM), also known as the TR and acceptance model (TRAM), to investigate the phenomenon mentioned above. Copyright 2022 Inderscience Enterprises Ltd.