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Analysis of some important fluid flow problems using differential geometry based methods
In this thesis we have studies MHD and EMFD flow of viscous and inviscid fluid for different cases when magnetic field and velocity are variably or constantly inclined. In particular magnetic and velocity vector are orthogonal. The pattern of streamlines and magnetic lines are derived in every problem and the effect of density and magnetic permeability on the variation of pressure is studied. The problems studied in this thesis give further investigation on the analytical solution of magnetohydrodynamic and electromagnetic fluid dynamic flow. -
Analysis of some important fulid flow problems using differential geometry based methods
In this thesis we have studied MHD and EMFD flow of viscous and inviscid fluid for different cases when magnetic field and velocity are variably or constantly inclined. In particular magnetic and velocity vector are orthogonal. The pattern of streamlines and magnetic lines are derived in every problem and the effect of density and magnetic permeability on the variation of pressure is studied. The problems studied in this thesis give further investigation on the analytical solution of magnetohydrodynamic and electromagnetic fluid dynamic flow. The problems that studied analytically in this thesis have possible application in theoretical analysis of fluid dynamics and the analytical findings in this thesis can be applied in engineering fields such as aeronautics, plasmas, liquid metals and salt water or electrolytes. We have studied five problems here in this thesis. These problems are to find analytical solution of different types of fluid flows in the presence of magnetic field. Here we give a brief summary about the problems discussed in detail in this research work. (i) GEOMETRY OF CONSTANTLY INCLINED VISCOUS MHD FLOWS newlineProblems on incompressible MHD flow of viscous and inviscid fluids having newlinefinite or infinite electrical conductivity have been investigated by many researchers newlineusing different transformation methods. Transformation method is applied from newlineone plane to another plane for studying the flows by reducing the order of the equation. In this problem we have studied a viscous MHD flow having infinite electrical conductivity when the magnetic field is inclined to the velocity vector in a constant angle. Hodograph transformation is applied to shift variables from the physical plane to the hodograph plane. Streamlines and magnetic lines are analyzed along with determining the solutions to the flow problems. Finally the newlinepressure variation is analyzed graphically. Flow pattern along with pressure variation, also studied in this problem for an orthogonal MHD flow. -
Optical and infrared studies of herbig Ae/Be stars
The work makes use of the unprecedented capability of the Gaia mission to study various properties of Herbig Ae/Be stars. We placed the Herbig Ae/Be stars in the Gaia color-magnitude diagram and accurately estimated their age and mass. The mass accretion rate is calculated from Hα line flux measurements of 106 HAeBe stars. The mass accretion rate is found to decay exponentially with the age of Herbig Ae/Be stars. Further, the immediate neighborhood of two Herbig Ae/Be stars, V1787 Ori and IL Cep, are studied using the astrometric and photometric data from the Gaia mission. We discovered a low mass binary companion to V1787 Ori using the analysis of distance and proper motion values from Gaia DR2. The mass ratio of the coeval binary system is found to be 0.23. Such a skewed mass ratio system is rarely identified in Herbig Ae/Be binary systems. The method of identification and characterization of the V1787 Ori wide binary system opens up the possibility of identifying more such systems. The HBe star IL Cep tells a much more complex story. The star is identified with a cluster of low mass stars associated with it. We identified 79 co-moving stars that are coeval to IL Cep, within 2 pc radius, from the analysis of Gaia EDR3 astrometry. The triggered star formation process called the "Rocket effect" caused by a massive star HD 216658 is identified to be the cause of the clustered star formation near IL Cep. The effect of this process is demonstrated for the first time using the proper motion data from Gaia. The immediate neighborhood of Herbig Ae/Be stars is identified as the formation region of long-chain carbon molecules such as Fullerenes and Polycyclic Aromatic Hydrocarbons. -
Optical and Infrared studies of herbig Ae Be stars
The work makes use of the unprecedented capability of the Gaia mission to study various properties of Herbig Ae/Be stars. We placed the Herbig Ae/Be stars in the Gaia color-magnitude diagram and accurately estimated their age and mass. The mass accretion rate is calculated from Hand#945; line newlineflux measurements of 106 HAeBe stars. The mass accretion rate is found to decay exponentially with the age of Herbig Ae/Be stars. Further, the immediate neighborhood of two Herbig Ae/Be stars, V1787 Ori and IL newlineCep, are studied using the astrometric and photometric data from the Gaia mission. We discovered a low mass binary companion to V1787 Ori using the analysis of distance and proper motion values from Gaia DR2. The newlinemass ratio of the coeval binary system is found to be 0.23. Such a skewed mass ratio system is rarely identified in Herbig Ae/Be binary systems. The method of identification and characterization of the V1787 Ori wide binary system opens up the possibility of identifying more such systems. The HBe newlinestar IL Cep tells a much more complex story. The star is identified with a cluster of low mass stars associated with it. We identified 79 co-moving stars that are coeval to IL Cep, within 2 pc radius, from the analysis of newlineGaia EDR3 astrometry. The triggered star formation process called the quotRocket effectquot caused by a massive star HD 216658 is identified to be the cause of the clustered star formation near IL Cep. The effect of this process is demonstrated for the first time using the proper motion data from Gaia. newlineThe immediate neighborhood of Herbig Ae/Be stars is identified as the formation region of long-chain carbon molecules such as Fullerenes and Polycyclic Aromatic Hydrocarbons. -
A Study towards constructing a reproductive health account as sub-account of health at sub-district level of india
Reproductive health is a state where everyone of the reproductive age cohort can make newlineinformed choices based on their reproductive health needs and reach a state of bliss and newlinewell-being. Informed choices are a possibility only if there is awareness regarding options of healthcare available. Awareness further indicates capacity to measure the worth of the options available in hand. One major aspect of measuring this worth is dominated by the financial aspect of awareness. In other words, expenditures incurred on reproductive health should be an information for all stakeholders to understand, analyse and arrive at informed newlinechoices. It has been unanimously felt that this domain of health needs more sustained efforts in terms of research into the specific components of expenditures. One such instrument which has been suggested is to construct a system of reproductive health accounts which TOVCI can track the fund movements among the different actors operating in the sector of reproductive health. Reproductive health accounts at local and contextual levels, has to conform to the existing national framework of health accounting so as to lend itself to inter and intra-regional comparisons. It consists of a group of matrices which capture origin of funds from financial sources to the destination where funds will ultimately be used on health functions, based on accounting boundaries of space, activity and time. This study attempted to construct a reproductive health account at sub-district levels in the district of Ramanagara in the state of Karnataka, India. Two sub-districts, Ramanagara and Channapatna were chosen for this purpose based on their health and reproductive health indicators. Primary data was collected from a household survey based on probability proportional to size sampling method. Questionnaires for data collection were borrowed from World Health Organization Guide to producing Reproductive Health Account. -
Effectiveness of adjuvant psychological therapy on alexithymia fatigue and affective dimensions among women with breast cancer
Psychological aspects in women with breast cancer are many. Among them are those related to what patients go through at different phases of treatment such as newlinediagnosis, pre and post-surgery, chemotherapy and radiotherapy. Women with breast cancer experience psychological repercussions which are specific to them. Some of them are poor body image, self-depreciation, weight changes and hair loss can be distressing to women with breast cancer. newlineThe underlying cause could be a deficit in emotional processing and affect regulation. This could lead to an inability in verbalising and identifying feelings newlinewhich is known as alexithymia. Closely related is the concept of fatigue which is newlinesubjective and tiredness which could last beyond treatments related to cancer. An newlineoverriding concept which could explain and understand these concepts is affect and newlinemood. Towards this end the objective of the study was to examine the efficacy of adjuvant psychological therapy in breast cancer in terms of alexithymia, fatigue, newlinedepression, anxiety, stress and positive and negative affect. newlineThe study also explored if there was an association among alexithymia, fatigue, depression, anxiety, stress and negative affect. The study consisted of 20 patients in the intervention and control groups each. newlineThey were administered the following scales namely, Toronto Alexithymia Scale (TAS-20), Checklist of Individual Strength, Positive and Negative Affect Scale and Depression, Anxiety and Stress Scale. Towards the end of the sessions, they were administered Revised Sessions Reactions Scale. Adjuvant Psychological Therapy is a therapy tailor made for those with cancer which includes both cognitive and behavioral techniques. The results indicated that among the subscales and total alexithymia scores, newlinethere were statistically significant differences across three time-frames in the newlineintervention group. -
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Influence of celebrity source credibility and celebrity-fan relationship on Fan's attitude towards social cause
Celebrities hold a special place in popular imagination. Their power to inspire fashion, choice of vacation, dictate food preferences and a host of other services is an interesting field of study. Over the years, celebrity endorsement has appeared as a leading advertisement format in developing successful brand campaigns. Celebrity endorsements are grounded on a common belief that endorsers can increase advertisement credibility thereby increasing brand image, awareness, and purchase behaviour. Understanding the nature of celebrities as sources in advertisements and promotions is a widely researched topic. There is an abundance of literature on the use of celebrities in commercial advertising with the end goal being sales and profits realised through intermediate outcomes such as brand image, attitude change, brand awareness and many others. Several celebrities across the world have endorsed social cause campaigns sponsored by governments and not-for-profit organizations. -
A Study on Regular Perfect Graphs
A graph (V, E) is said to be a perfect graph if the independence number of every induced subgraph in G is equal to the clique covering number of the subgraph in G. The independence number of a graph G is denoted by and#945;(G), and it is the maximum number of vertices in G such that no two of them belong to the same clique in G. The clique covering number of a graph G is denoted by and#952;(G), and is the minimum number of cliques required to cover the vertex set of G. F- perfect graph is a special type of perfect graph, where F can be any graph, like, complete graph (Km), the complement of a complete graph (Km), star, cycle, and so on. A graph G is said to be F-perfect if F-independence number for every newlineinduced subgraph H of G is equal to its F-covering number. The F-independence number of a graph G is the maximum number of vertices in G such that no two of them belong to the same F-subgraph in G. F-covering number is the minimum number of F-subgraphs in G that is required to cover the vertex set of G. newlineThe present study introduces the concept of regular perfect graphs, and induced regular perfect graphs which are denoted by R-perfect graphs, and R-perfect graphs respectively. These graph classes are obtained by considering F as the set of all regular subgraphs in a graph, R, and the set of all induced regular subgraphs, R, in a graph respectively. We conceptualise the graph parameters, R-independence number, and R-covering number for R-perfect graphs and R-independence number, and R-covering number for R-perfect graphs, and characterise both these classes of graphs. We initially study a subclass of regular perfect graphs, namely, cycle perfect graphs (C-perfect graphs) and induced cycle perfect graphs (C-perfect graphs). Further we extend the study to analyse various product graphs under C-perfection, and characterise them. -
Synthesis, Characterization and Catalytic activity of Zirconia-Ceria catalysts
The development of catalysts is critical for the economical and environmentally efficient generation of chemical compounds that underlie every aspect of our society. Catalysts are key players in research involving the discovery of pharmaceuticals, materials, and polymers. In addition, catalysis is especially powerful in bulk synthesis, allowing the production of compounds, polymers and commodity chemicals via routes that would otherwise be impossible. Ceria is the unique rare earth for which dioxide is the normal stable phase contrary to the others for which Ln2O3 is the normal stoichiometry. The applications of ceria based materials are related to a potential redox chemistry involving Ce(III) and Ce(IV), high affinity of the element for oxygen and sulphur and absorption/excitation energy bands associated with its electronic structure. Zirconium is one of the more abundant elements, and is widely distributed in the Earth's crust. Being very reactive chemically, it is found only in the combined state or as part of a complex of oxides as in zircon, elpidite, and eudialyte. Doping ceria with zirconia may improve the oxygen storage properties of ceria at three different levels. At the level of the microstructure, it inhibits surface diffusion and in turn the loss of surface area at high temperatures. At the microscopic level, substantial doping may result in the formation of an interface structure that facilitates the oxygen transport from bulk to the surface. At the atomic-level, it stabilizes the oxygen defective structure. The texture, structure and thermal stability of ceria-zirconia doped oxides are closely related to the ratio of cerium to zirconium in the solid solution. Chapter 1 comprises of the general introduction of catalysis, importance of solid acid catalysis, sulphated metal oxides, pure ceria, pure zirconia, modified ceria and zirconia. It gives a brief introduction about the nitration of toluene. The aim and objectives of the present investigation are also described at the end of this chapter. Chapter 2 comprises of a thorough literature survey on the significance of solid acid and super acid catalysts in various domains of chemical industry and importance of anion promoted zirconia and ceria catalysts. The definition of ??super acid and their classification vii on the basis of origin of the active sites are also outlined. Importance of modified metal oxides is also outlined. Chapter 3 deals with the experimental procedures and techniques employed in this investigation. Scientific aspects of the precipitation and impregnation methods were outlined. The experimental details of surface area measurements by BET method, application of X-ray powder diffraction studies for crystalline phase and size determination, elemental detection by EDAX, spectral details from FTIR and thermal stability by TGA have been described. Chapter 4 deals with the various characterization results and discussion of pure, doped and sulphated Zirconia-ceria solid acid catalysts. The bulk and surface properties of the catalyst was discussed by XRD, BET surface area, TGA and FTIR. All characterization results revealed that the incorporated sulphate ions has a significant influence on the surface and bulk properties of the ZrO2-CeO2 catalyst. The prepared catalysts are investigated for the liquid phase nitration of toluene under various reaction conditions. Chapter 5 gives with the summary and conclusion of the present study. It also gives the future scope of the present study. On the whole, zirconia-ceria solid acid catalysts were successfully synthesized by simple route. Physicochemical characterization of all these catalysts revealed that the loaded sulphated and doped metal oxides show a significant influence on the surface and bulk properties of the ZrO2 - CeO2. These catalysts are found to be active for the liquid phase nitration of toluene. Key words: Solid acid catalysis, Zirconia-Ceria, Sulphated zirconia-ceria, Nitration of toluene -
Influence of social issues potrayed in commercial movies on the youth audience /
The dissertation titled Influence of social issues portrayed in commercial movies on the youth audience speaks about the effectiveness of the film as a means of communication to the large audience especially to the youth. As in the recent times the film industry is growing tremendously and many films are Bourne to experimentation, and commercial films also changing. In this regard this research paper analyses the implication of the commercial films on the youth audience as they are more prone to the changes of the media. The researcher analysis in this research paper the effectiveness of the commercial films on the youth audience, For this purpose the researcher conducted survey analysis taking 100 respondents as the sample size of youth group ranging from 15 -30 age group. In the literature review the researcher have used few theories to explain the phenomenon and also have collected few previously done researches related to the area of the subject. -
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WORK LIFE BALANCE: ISSUES AND CHALLENGES IN THE INFORMATION TECHNOLOGY SECTOR
Major issues and challenges in work life balance is the impact of work life balance (WLB) on quality of life (QOL). Work-life balance has always been a concern of those interested in the quality of working life and its relation to broader quality of life. Some other issues and challenges are work-family conflict, impact of work and family stressors and conflicts on the mental health, stress and work life balance etc. Quality of life refers to the favourableness or unfavourableness of a total environment for people. QOL programs are another way in which organisations recognise their responsibility to develop jobs and working conditions that are excellent for people as well as for economic health of the organisation. Work ?? Life Balance is a challenging issue for IT leaders, managers and has also attracted the attention of researchers. Work/life balance, in its broadest sense, is defined as a satisfactory level of involvement or ??fit between the multiple roles in a persons life. In this climate managing the boundary between home and work is becoming more challenging. This study is an attempt to contribute afresh with a new perspective to the field of human resources with special reference to QOL in relation of employees work ?? life balance in IT organizations. It is also an earnest attempt to bridge the gap especially in this area by highlighting the relevance and importance of work ?? life balance and QOL to leadership, senior management, individual and organizations and hoping this study will initiate a series of serious and productive discussion on the subject. The findings and outcome of this research will be beneficial to the IT organizations in India, which is a flourishing industry and contributes significantly to the GDP of the country and the talent pool of the world The sample consisted of 350 IT employees from Bangalore city. The sample consisted both male and female married IT employees. The major findings of the study were: i.Work life balance is having positive correlation with quality of life. ii.It was found that the PLIW has a significant influence on the overall stress of the employees. The other variable does not seem to significantly influence the overall stress of the employees. iii.It was found that there was no significant influence of the work life balance on the life enjoyment of the employees. iv.It was found that there was a significant influence of WIPL and WPLE on the overall quality of life. v.There is no significant influence of work life balance on the overall impression of the employees. vi.There is no significant difference of the dimensions of work life balance and quality of life across age groups. vii.It was found that there was significant difference across age groups for the work/personal life enhancement dimensions. viii.It was found that there was no significant difference across gender for the overall quality of life dimensions. ix.Work life balance is having positive correlation with quality of life. CONCLUSION IT organizations should come up with effective and efficient work ?? life balance policies and programs, this will help reduce the work ?? life conflict for IT employees. Further IT leaders should take initiative to improve the quality of life of their employees as it plays a significant role in the organization to improve individual and organizational performance. -
DETERMINANTS OF ORGANISATIONAL CITIZENSHIP BEHAVIOUR OF EMPLOYEES IN BUSINESS PROCESS OUTSOURCING SECTOR
Organizational Citizenship Behaviour is defined as the voluntary behaviour in which employees go beyond what is formally expected of them to contribute to the well being of the organisation and people involved in it. The present study investigated whether Big five Personality Traits and Psychological Contract have significant influence on Organisational Citizenship Behaviour of employees in Business Process Outsourcing Sector. Convenience sampling was adopted to administer the questionnaire (questionnaires were administered to the target sample from the business process outsourcing companies that gave permission, and through the online). Judgmental sampling method was adopted for deciding whom to administer the questionnaire. Employees must have worked for minimum 2 years in the present company to complete the questionnaire. 500 questionnaires were distributed and 381 fully completed questionnaires were compiled for analysis (76.2% response rate). In the present study the dimensions of Big Five Personality Traits ?? Extraversion, Agreeableness, Conscientiousness, Neuroticism and Openness to Change, the Psychological Contract Variables - Relational Contract, Transactional Contract, Employer Commitment, and Employee Commitment, and the dimensions of Organisational Citizenship Behaviour- Altruism, Conscientiousness, Courtesy, Civic Virtue and Sportsmanship were measured on 381 employees of top 10 BPO companies listed by NASSCOM . The result of the present study indicated that extraversion dimension of Big Five Personality Traits had a significant influence on Organisational Citizenship Behaviour. Psychological Contract variables Relational Contract, Transactional Contract and Employer Commitment had a significant influence on Organisational Citizenship Behaviour. In this study we have analyzed the implications based on the results found. Some of the implications of the study were the BPO employees high on extraversion, may display more citizenship behaviours towards the organisation. The employees who scored high on the psychological contract measures may result in exhibiting voluntary behaviour towards the organisation. It is suggested for the future researchers to replicate the study to determine how the findings reported here correspond to the results of studies conducted in other work environments to ensure proper generalization. Future researches also need to consider the moderating influences of person and situation-based factors on the relationship between Big Five personality Traits, Psychological Contract and OCB. Additionally, researcher may consider the respondents position in future studies as findings. A dyadic response from both the managers and employees can be a better study to avoid bias and self rating. Key words: Organisational Behaviour, Big Five, Psychological Contract, Organisational Citizenship Behaviour, Human Resource Management. -
A critical look on transformation on text into visuals - Martin scorsese's wolf of wall street /
Adaptations of texts to movies have always been a genre of their own in the world of cinema, where there have been many adaptations of which a few are successful while some have failed to convince the audience. This particular paper talks about how Martin Scorsese has adopted the art of making biographies where he has chosen his story lines from existing texts on biographies and his ability to make these biographies on personalities who are still alive. -
Soft computing techniques for hub sequence analysis /
Bioinformatics, the combination of Biology and Information Technology has become a pioneer industry booming worldwide. One of the grand challenges in biology is to understand organizing principles of bimolecular networks. There seems to be a deliberate effort towards uncovering new laws of biological complexity. One of the most pressing needs in this area is the understanding of protein-protein interaction networks and their complexity. Hub proteins- network elements with high connectivity- literally ??hold the networks together. Though several experimental methods have been developed to identify hub proteins, it is important to supplement procedures for pattern recognition to classify/predict hub protein sequences. This research work aims at the classification and prediction of hub proteins of two model organisms- Homo sapiens and Escherichia coli using different computational approaches of pattern recognition such as Principal Component Analysis (PCA), Artificial Neural Network (ANN) and Linear Discriminant Analysis using (i) Class Dependent Approach (LDACD), (ii) Class Independent Approach (LDACIND), and (iii) Normal Bayes Classification (LDANB).