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Multi-component condensation mediated synthesis of bioactive heterocyclic compounds
Aromatic heterocycles constitute the most diverse family of organic compounds. Moreover, aromatic heterocycles are widely used for the synthesis of dyes and polymeric materials of high value. The development of selective reactions that utilize easily available and abundant precursors for the efficient synthesis of heterocyclic compounds is a long-standing goal of chemical research. Despite the centrality of its role in a number of important research areas, including medicinal chemistry, total synthesis,and materials science, a general, selective, step-economical, and stepefficient synthesis of heterocycles is still needed.Pyrano[2,3-c]pyrazole derivatives have been synthesised by a one-pot multicomponent condensation of different aldehydes, dialdehydes, and ketones with malononitrile, ethyl acetoacetate, hydrazine hydrate (or phenylhydrazine) in the presence of magnetic nano-[CoFe2O4] catalyst under ultrasonic irradiation. The catalyst can be retrieved using an external magnet and used repeatedly. A practical, scalable method for obtaining various pyranopyrazoles has been demonstrated.
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A study of thinking style, teacher effectiveness and emotional intelligence of secondary school teachers of Bangalore city
Education is a social process by which knowledge is transferred to students through the intermediaries, the teachers. It can be had from non - formal and formal systems of Education. All formal systems are based on the classroom teaching. "The destiny of India is being shaped in her classroom", has been pointed out by the Indian Education Commission (KOTHARI COMMISSION) (1964-66) and to that, it may be safely added that the destiny of these classrooms is being shaped by the teachers. According to the American Commission, the quality of the nation depends upon the quality of the citizens. The quality of its citizens depends, not exclusively, but in critical measure upon the quality of their Education. The quality of their education depends more upon the quality of teachers. Humayun Kabir rightly said once, "Without good teachers even the best of system is bound to fall, with good teachers, even the defects of a system can be largely overcome". The teacher is the flywheel of the whole educational machine. Elaborate blue prints, modern school plans, the best equipment, the newest of the new
media or progressive methods will remain dead fossils unless there is the right use of teachers. The document, Challenge of Education -A Policy Perspective (1985) has highlighted that teacher performance is the most crucial input in Education. No development has reached the threshold of development of new technology which is likely to revolutionize the classroom teaching. -
Study of linear and non-linear analyses of Rayleigh-Benard-Chandrasekhar convecion in micropolar fluid with saturated porous medium
Thermal instability of Chandrasekhar convection in a micropolar fluid, saturated porous layer is being investigated in this study. The model is confined between two horizontal plates of infinite length and separated by a fixed distance. A uniform temperature gradient is provided at the lower plate, while the upper plate is cooled. The study is analysed for both linear as well as non-linear cases to understand the stability, transfer of heat and mass within the model. The study is carried out in extending the model for Rayleigh-Benard and double diffusive convection with external constraints such as in- ´
ternal heat, concentration source, gravity modulation, temperature modulation, coupled cross diffusion and throughflow. The outcome of the study is discussed in detail and presented pictorially through graphs. -
Empowering women living with HIV/AIDS-A study on organisational strategies and challenges
The acts of discrimination & exclusion meted out to the people living with HIV/AIDS, and the stigma attached to the condition deprives the afflicted, of their capacity to exercise their fundamental rights and to access basic necessities. Specifically, the suffering of the women stricken by this chronic, incurable malady, the majority of whom from economically weaker sections of our society is very poignant. From the time this pandemic broke out in 1984, world organisations, national and local organisations, both government and non-government have come to the aid of the PLWHA. Some of them cater singularly to the needs of the WLWHA, who are as such more vulnerable ever since the plight of the women living with the deadly disease was brought to light. But as the years went by, there has been a decline in the help extended to the WLWHA. This study is undertaken to ascertain the current state of services and strategies used by the organisations to empower the WLWHA and the challenges faced by the organisations in their endeavours. -
A framework for integrating nested queries in natural language interfaces to databases
To translate Natural Language (NL) statements into Structured Query Language
(SQL) queries, different methods and systems were proposed in the past. This work presents a framework for automating the translation of Data Requirement
Specifications (DRS) given by enterprise Business Users in NL into SQL queries,
focusing on requirements that result in the generation of nested SQLs. The framework takes the business user’s DRS given in English as input and generates an initial query sketch by employing semantic parsing. This initial sketch is further refined and completed into a well-formed SQL by consulting the Database Schema. It performs the translation by combining NL processing techniques with Query Sketch generation methods and refines it by employing Repair techniques or extends it further. The framework suggests using Lambda expressions for intermediate representation and employs standard operations of Lambda Calculus for performing the required transformations needed for translation. Lambda Context Calculus (LCC) provides the operational semantics and the relevant methods needed in transforming NL statements into SQL, preserving the integrity and compositionality24 of expressions in every step of the translation. Though Lambda Calculus is found to be effective in representing the intermediate expressions and assists in performing the transformations that are needed for translating specific predicates into SQL, its inflexibility in combining parallel computations is a constraint. To represent clauses that are in parallel or are in
pipeline, and to perform the required transformations on the intermediate expressions involving these, more advanced programming constructs are needed. It also adopts functional programming techniques to deal with complex scenarios involving nested queries. This work recommends the use of some advanced language constructs, the Fixed-point Combinators11 and Monad Comprehensions20 for performing the required transformation at the intermediate language level and adopts functional programming techniques for the required syntactic sugar. -
A study on induced path decompositions of graphs
A graph is a discrete structure consisting of a set of objectscalled vertices and another set of objects called edges depicting the relationship between pairs of vertices. Therefore, graphs serve as effective models to study networks of all types such as computer networks, telecommunication networks and social networks. The concept of a graph possesses the unique combination of features like simplicity, visibility, beauty, clarity, elegance and effectiveness
in studying problems dealing with network structures. It might be a simple structure like that of an organizational structure in a college, a complex structure like the world wide web (www) or just an abstract structure consisting of objects that are inter-connected according to some rule. -
A study of the effectiveness of technology enabled learning strategy based on multiple intelligences on the achievement in history and civics of elementary school students in Bangalore
Education in ancient India in its traditional form was closely related to religion and was limited to a very small section of Indian society. Ancient education in India followed an oral tradition, which laid stress on memory. Subjects like arts and sciences related to government: politics, economics, philosophy, and historical traditions were taught (Thapar, 2002). With the arrival of Islam in India, the traditional methods of education underwent a change. Islamic institutions of education in India taught grammar, philosophy, mathematics, and law influenced by the Greek traditions inherited by Persia and the Middle East, before Islam spread from these regions into India. A feature of this traditional Islamic education was its emphasis on the connection between science and humanities. -
Modulated Rayleigh-benard ferroconvection in couple stress fluid
Ferromagnetic fluid with couple-stress confined between two stress-free, isothermal horizontal plates is considered in this study. The effect of different types of modulation on Rayleigh-Bénard convection in a ferromagnetic fluid with couple-stress is examined by considering sinusoidal (sine) and non-sinusoidal (square, triangular, and sawtooth) wave type of modulation. Rayleigh-Bénard convection in a ferromagnetic fluid with couple-stress subjected to gravity, rotation, temperature, and internal heat modulation is discussed by performing linear and non-linear analyses. The effect of various parameters on the onset of convection and heat transport is studied. The ferromagnetic parameters hasten the convection onset and enhance the heat transfer under various modulations. The results of a Newtonian fluid, ferromagnetic fluid, and couple-stress fluid are obtained as the limiting cases of this study. -
Attitude towards the medical profession among higher secondary students in relation to medical aptitude, parental influence, peer influence and perceived social expectations
Attitude towards the Medical Profession includes concepts, motives or beliefs associated with the profession of medical science. Medical science is a profession that challenges the intellectual competency of the aspirant owing to the strenuous demands of the career. It is essential that possession of an appropriate attitude and a realistic understanding of the demands of medical science be a pre-requisite, especially if the higher secondary adolescent aspires this as his or her vocation for life. As theformation of attitude is based on several intrinsic and extrinsic factors, a profession like medical science faces stiff competition among candidates to qualify with high expectations from family and society. The current study throws light on the attitude of higher secondary students towards the profession of medical science in relation to medical aptitude, parental influence, peer influence and perceived social expectations, as the independent variables. It aimed to explore the role played by medical aptitude, parental influence, peer influence and perceived social expectations in the formation of attitude towards the medical profession and the differences in the formation of this attitude among higher secondary students based on their gender and type of pre-university college that they belonged to. The study adopted was a descriptive study-cum-survey that employed a quantitative approach using the paradigm of post-positivism. The participants for the study comprised of 396 second-year higher secondary students from pre-university colleges of Bangalore South, who were
selected by convenience sampling method. -
Polyvinyl alcohol and epoxy based composites for radiation shielding applications
Extensive use of radioactive isotopes in medical fields, industries, and radiations in research and nuclear reactor establishments has increased the risk of exposure to directly and indirectly ionizing radiations. While charged particles such as beta, proton, alpha and heavy ions are directly ionizing radiations, X-rays and γ-rays are indirectly ionizing radiations. X-rays are often used to sterilize medical equipment and to treat cancer, while X-rays are used to provide static images of parts of the body such as teeth, bones, foreign substances within body, and are also used in industries to find fracture defects. According to the report by National Council on Radiation Protection and Measurements (NCRP, 2009), the use of ionizing radiations in medical field has drastically increased from 15% to 48% during 1980-2006. These radiations having sufficient energy interact with human body causing damage to living tissues. Though beneficial, prolonged exposure to these radiations can cause both somatic as well as genetic damage depending on time, distance and the type of radiation exposure. Hence, precautionary measures against the hazardous effects caused by these radiations have become a major concern in modern times. While exposure to radiations is inevitable, the radiation effects can be reduced by limiting the time of exposure, increasing the distance from radioactive source and using suitable shielding material. -
Study of substitution effects on structure and properties of high temperature superconductors and isostructure compounds
The branch of physics which deals with the properties of solid materials and their constituent particles such as protons, neutrons and electrons is known as solid state physics. There are wide ranges of physical properties of solids. Some of the materials are very good conductors of heat and electricity whereas others are bad conductors. -
Sustainable tourism management: Issues and challenges of eco and wildlife resorts in Karnataka
Sustainable tourism principles comprise of visitor satisfaction, the economic sustainability of the industry, environment conservation, socio-cultural and economic development of local communities. The tourism industry has to consider all these elements while developing any form of tourism for its long-term sustainability. Eco and wildlife resorts are one of the prominent and attractive segments of the accommodation sector. It has a major implication for implementing sustainable tourism practices in their daily operations since they are set close to nature and reside in pristine wildlife regions. It is inevitable for eco and wildlife tourism, to consider all the elements of sustainable tourism practices and to implement it in their day to day activities. At the same time, they might have to face issues and challenges in implementing sustainable practices. So, the main objective of the research is to understand operational issues and challenges of eco and wildlife resorts in achieving sustainable tourism principles. -
Linear and nonlinear convection in dielectric fluids
The thesis is concerned with linear and nonlinear Rayleigh-Benard electroconvection in a horizontal porous layer. Modified Darcy law is employed to describe the fluid motion. The effect of non-0classical heat conduction, chemical reaction, thermal radiation and finite amplitudes on the onset of Darcy electroconvection is considered. The findings of the problems investigated in the thesis may prove useful in heat transfer application situations with dielectric fluids as working medium. -
Development and efficacy of creativity enhancement programme for adolescents with specific learning disability
Adolescents with Specific Learning Disability (SLD) face academic and emotional challenges in their school life. Creativity is a skill which helps adolescents to approach problems of daily life differently. That would help them to explore and nurture their self-esteem. Though there is a debate on whether creativity is innate or learned, activities are still required for children to recognize and nurture the creative skills in children. Studies show that creative tasks develop self-esteem in children and also decrease depression in children with SLD. Creativity Enhancement Programme (CrEP) is developed as part of the study in consultation with experts in the field based on Torrance’s Theory of Creativity. The Programme tested the efficacy in improving the creativity and the self-esteem as well as reducing anxiety and depression of 100 adolescents with SLD. The adolescents with SLD, studying in class sixth to ninth in five schools that follow the state syllabus and English medium of instruction, which are situated in South Bengaluru were selected. Initial screening consisted of an assessment of SLD and intelligence to select participants. Out of 100 students with SLD, 50 students each were randomly allocated to experimental and control groups. -
Development and effectiveness of a screening measure and a computerized cognitive remediation program for children with reading and arithmetic difficulties
Reading and arithmetic skills are considered as the foundation skills necessary for educational and vocational success. Research has outlined the important role of specific cognitive functions for efficient reading, comprehension of text and arithmetic processes. Learning difficulties have been shown to have a tremendous impact on later life, both in academics and social relationships. It therefore becomes imperative that we identify, as early as possible, children ‘at risk’ for learning difficulties and attempt to assess the relevant cognitive skills and plan and execute intervention programs to improve the efficacy of these cognitive skills. This present study has attempted to do this, keeping the Right to Intervention (RTI) model as the rationale and has focussed on designing an assessment tool along with a remediation program based on the cognitive viewpoint. -
Purchase intention of deconstructed end-of-lifecycle Fashion products in an outline and offline retail environment
Obsolete or slow-moving inventory is one of the major influencers for the bottom line of any business today. Surplus stock- be it from overbuys, returns, defects or simply merchandise hitting the end of their lifecycle- need to be accounted, accommodated and dealt with in a manner that can least affect the planned margins. For the fashion business, such merchandise poses greater challenges. The business is ground by seasonal preferences, fast-changing trends, short lead-times and shorter shelf-lives. With rising costs of traditional retail businesses, the associated costs of carrying such inventory are something that the retailer can easily do without. At the retailers’ end, such merchandise is often subjected to traditional liquidation methods such as Markdowns, carry forwards, or selling at lowered prices to discount stores or factory outlets. From a manufacturer’s perspective, overruns from production are either sold at discounted costs to the retailer or are diverted to other sources of sales. In either case, such decisions do affect the margins of the business, and retailers often account for these “necessary evils” while planning their pricing strategy. -
Determinants of consumer product return behaviour with respect to online shopping of apparels
This research aims at finding the determinants of consumer product return behavior with respect to online shopping of apparel in Bangalore city. The study was administered to 600 respondents, and the response received was from 465respondents. The convenience sampling method was used to collect samples across Bangalore city. Product return behavior was measured using a five-point Likert scale for 34 items. -
Academic leader behaviour, influence tactics in relation to organisational commitment and work engagement of faculty in higher educational institutions
The importance of academic leader behaviour and influence tactics needs to be overemphasized, as these are the most essential components of practically every educational institution. A clear understanding of educational institution requires a thorough analysis of academic leader behaviour and influence tactics as main features. Academic leaders regularly acquire and use power. They do so deliberately and consciously as well as intuitively and unconsciously. Leadership and power do differ in goal compatibility, direction of influence on one’s subordinates and research emphasis. This study attempts to reduce drastically these differences and focus on the positives of influence tactics and leadership processes to be exercised by higher authorities for enhancing institutional effectiveness. -
Role of project management methodologies in achieving project success and business value creation in financial services IT provides
Increasingly, project-based organizations, have been implementing
project management methodology for specific projects based on the dynamic environment. Financial services face challenges in the form of unstable market conditions, economies and technology, strict controls, and higher stress to meet customer demands and maximize profits. They are compelled to provide services that are tailored to changing customer interests as a result of technological innovations and developments. Financial services especially information technology-based businesses find it difficult to sustain considering the dynamic behavior of the market in terms of efficiency and controlling the cost based on market changes. Moreover, financial services are also constrained to manage stakeholders while maintaining flexibility and responsive processes and focusing on technological advancement to improve success in projects. Many IT initiatives fail to provide the desired outcomes as per the project budgets, project types, and project contexts. Some are also unable to deliver business value to the customers due to the adoption of an unsuitable project management methodology. Regardless of the wide variety of choices, project managers often fail to decide on available alternatives. Project managers tend to tailor projects based on criteria that may not be associated with the overall project objectives rationally. The goal of this research work is to assess the role of hybrid and agile project management approaches in achieving success and creating business value considering project contexts for financial services IT projects. -
Duplex functionally graded and multilayered thermal barrier coatings based on 8% yttria stabilized zirconia and pyrochlores
Thermal Barrier Coatings (TBCs) protect gas turbine engine metal components while they serve in a high temperature environment (upto 1200℃). 8% YttriaStabilized Zirconia (8YSZ) is the current state of the art material for TBCs. Typically, 250 to 500 μm (upto 2 mm) thick TBCs can lower the metal temperature by upto 150°C than the service temperature and thereby enhance life to the components. 8YSZ TBCs however, suffer from (a) increased sinterability, (b) phase de-stabilization and (c) poor adhesion with time in service at high temperature. In order to facilitate longer engine running time, research is being directed towards finding (i) newer materials that do not possess these deficiencies or (ii) configurations that can overcome them. In order to further improve the performance efficiency of the engines, TBC materials with extended thermal fatigue life at higher than current service temperatures (>1100℃) are also being actively investigated. In the same area of research, this thesis presents the findings of work on air plasma sprayed (i) duplex, (ii) functionally graded and (iii) multilayered configurations of TBCs synthesized from commercial 8YSZ and lab synthesized pyrochlore (lanthanum zirconate, lanthanum cerate and lanthanum cerium zirconate) compositions with NiCrAlY bond coat.