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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% Yttria- Stabilized Zirconia (8YSZ) is the current state of the art material for TBCs. Typically, 250 to 500 ?m (upto 2 mm) thick TBCs can lower the metal temperature by upto 150C 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. Duplex i.e., 2-layered TBCs, synthesized by depositing commercial 8YSZ ceramic topcoat (METCO 204 NS) and NiCrAlY bond coat (AMDRY 962) plasma spray powders on Inconel 718 and/or stainless-steel substrates were used for benchmarking purpose (designated as conventional 8YSZ TBC). Next, TBCs were prepared by using these two powders in blended form (8YSZ+NiCrAlY) to serve as a third intermediate layer between the duplex TBC layers in functionally graded material (FGM) configurations. The role of he third intermediate layer is to minimize the thermal expansion mismatch between the ceramic and bond coat layers at elevated temperatures. 8YSZ FGM TBCs were prepared from three different blends of plasma spray powders of NiCrAlY and 8YSZ (i .e., 25%NiCrAlY +75%8YSZ, 50% NiCrAlY + 50% 8YSZ and 60% NiCrAlY + 40% 8YSZ). The development of newer ceramic TBC materials and configurations was achieved by the synthesis of novel pyrochlores and FGM TBCs from them. The Rare-earth pyrochlores and Rare-earth zirconate pyrochlores studied were (i) Lanthanum Zirconate (La2Zr2O7), (ii) Lanthanum Cerium Zirconate (La2 (Zr0.7Ce0.3)2O7 and (iii) Lanthanum Cerate (La2Ce2O7). Plasma sprayable powders of these compositions were synthesized in the laboratory via a solid-state method. They were spray-coated by Atmospheric Plasma Spray (APS) method in duplex layers by using three different spray parameters on NiCrAlY bond coated substrates. The spray parameter that provided the best TBC for each composition was identified based on preliminary thermal fatigue tests. FGM TBCs with (50% NiCrAlY+ 50% 8YSZ) blend as intermediary layer exhibited significantly improved thermal fatigue resistance (life) over conventional 8YSZ TBC (up to 1400?). Hence, in the FGM pyrochlore system too, further studies were restricted to TBCs with (50%NiCrAlY+50% pyrochlore) blend layers to serve as the intermediate FGM layers. Further studies involved the synthesis of multilayered TBCs: two types of systems have been experimented (a) FGM with commercial 8YSZ integrated with the pyrochlores - here the intermediary blend layer was (50% NiCrAlY+ 50% 8YSZ), and lab synthesized pyrochlores were the topcoats and (b) 8YSZ as an intermediary layer and pyrochlores as the topcoats. Identical (to the extent possible) characterization methods were employed to study and evaluate all TBCs synthesized in this research work. They were (1) thermal fatigue tests between high temperature & ambient by using (a) gas flame (1200? & 1400?) and (b) furnace (1150C) (2) oxidation stability tests (at 800?,1000? and 1150?) (3) structural phase analysis (XRD) and (4) microstructure with chemical composition analysis (SEM/EDS). The work was aided by studies on adhesion strength test (ASTM C633 standard), residual stress analysis and assessment of thermal barrier effect (temperature drop across TBC) in chosen few TBCs. TBCs fabricated from three pyrochlores exhibited significant improvements in terms of thermal fatigue resistance at 1200? and 1400?. In duplex, Multilayer (ML) FGM and Multilayer (ML) configurations, La2Ce2O7 (LC) TBC performance was exemplary in all configurations studied in this research work. XRD analysis of pyrochlores in duplex, ML-FGM and ML configurations TBCs evaluated for thermal fatigue at 1200? and 1400? (gas flame heating) exhibited no phase destabilization in the failed specimen, confirming the thermal stability of the TBC system within the coated layers. The trend of improved thermal fatigue resistance of lanthanum cerate TBCs continued when studied via high-temperature furnace heating at 1150? as well. The experimental research work with details of TBC systems, processing, characterizations, and discussion based on findings and published literature to explore the prospective TBC material system and configuration with the potential to serve as an alternative to conventional 8YSZ TBC, in terms of life and thermal fatigue resistance, comprise the main contents of this thesis. -
Influence of emotional intelligence as mediator between workplace spirituality and organisational citizenship behaviour
Spirituality at work has developed as a research discipline over the last decade. There have been a few theoretical studies emphasizing on the significance of the construct. The external and internal factors affecting the relationship of this construct need to be analysed for enabling its newlineimplementation in the business world. The construct needs further empirical studies to establish itself as an implementable HR practice, contributing significantly to the bottom line. Organisational citizenship behaviour is critical for performance amidst uncertainty. Emotional intelligence has newlinebecome more critical in overcoming the challenges faced by the Information Technology (IT) sector in India. This study fills the gap in the current literature studying the influence of emotional intelligence in the relationship between workplace spirituality and organisational citizenship behaviour in the Indian IT sector context. The challenges faced by the Indian IT sector are unique and needs alternative solution to avoid a downfall in the sector contributing majorly to the national GDP. The sample is 800 IT sector employees selected through judgmental sampling. The data is collected by using online survey newlineinstruments. SEM modelling has been used to analyse the data and use the same for development of an implementable model relating the dependent and the independent variables. The findings state that there is a direct and positive relationship between newlineworkplace spirituality and organisational citizenship behaviour. In addition, newlineemotional intelligence mediates the relationship between workplace spirituality and organisational citizenship behaviour. Longitudinal testing of the relationships has been left as the scope for further studies. -
Organic and Inorganic compunds anchored graphene frameworks as materials for sensor and supercapacitor applications
The specific atoms or group of atoms that can attach to the other organic or inorganic newlinecompounds due to the strong affinity is called as the anchoring group. The electrons newlinefrom these organic and inorganic compounds are potent to travel through the anchor newlinegroup. This leads to specific features with the change in the arrangement of atoms in newlinethe entire molecule/system. Hence, the redox reaction properties, molecular chain newlinelength and the extent of conjugation of the resultant anchored product vary. Depending upon the binding nature, anchoring groups can be divided into monodentate, bidentate, and multidentate. Among these, multidentate anchoring groups are more significant since it can bind either partially to the molecules or with the whole surface. Though many multidentate anchoring groups like fullerene, carbon nanotubes, polymers, calixarenes, and graphene are presented in the literature, newlinegraphene oxide anchored organic and inorganic compounds are important because of its amazing contributions to the material science and design. The high thermal and electrical conductivity, large surface area, mechanical strength, and availability of more mobile electrons make graphene as the suitable anchor group for diverse applications in the field of adsorption of polluted gases, catalyst for the organic conversions, medicinal chemistry, electrochemical sensing, and energy storage devices. Therefore, Graphene oxide (GO) is one of the good choices to develop supercapacitance systems and electrochemical sensing materials. Heteroatom doping, conducting polymer, metal complexes, and metal oxides anchored graphene oxide are more significant because they change the electroactive properties significantly. Considering these, we studied the photophysical and electrochemical properties of chromium complex anchored GO synthesised by silane and diazonium coupling. -
Adoption of cashless payment systems among consumers
The primary goal of any national payment system is to ensure smooth circulation of money. An efficient and secure payment system triggers economic activity and electronic payment systems in particular, benefit both the customer s and the country s economic growth. Diverse payment systems function ranging from paper-based ones where the instruments are physically exchanged and settlements worked out manually, to the sophisticated electronic fund transfer systems which are fully secured and transactions settled on a gross, real-time basis. Researchers have used various technology adoption models to predict their usage. The purpose of the study is to investigate the key driving factors responsible for the consumers adoption of cashless payment system. A descriptive study method using the paradigm of post - positivism was employed with a sample of 390 respondents from Bangalore who have used cashless payments. They were selected by purposive sampling using snowball sampling. The study is based on both primary and secondary sources of information. The current study extended the UTAUT with new constructs Habit, Hedonic Motivation, Price Value, Trust, Innovativeness, Perceived Risk, Attitude Towards Using Cashless Payment System and Anxiety. The findings of the study reveal that the factors namely Effort Expectancy, Performance Expectancy, Social Influence, Habit, Facilitating Conditions, Hedonic Motivation, Price Value, Trust, Innovativeness, Perceived Risk, Attitude Towards Using Cashless Payment System and Anxiety have significant influence on the consumers cashless payment usage. A close positive correlation of cashless payment systems usage with the independent variables was seen. The gender, age, income, occupation and educational qualification of the respondents has a significant role to play in their willingness to use cashless payments. The study gives an insight on what the considerations to look into while launching a new payment system are and the means to deal with consumers to adopt and use the same. -
Indian catholic priests' identity, relational autonomy and attachment to god : A Narrative analysis
A thematic narrative analysis was carried to explore the 28 South Indian Roman Catholic religious priests identity, relational autonomy and attachment to God. Fourteen participants were selected from the structured priestly ministry settings newlinenamely education ministry and, another 14 participants from the semi-structured newlinepriestly ministry settings namely parish and priestly formation ministry settings. The newlinequalitative data collected through the interviews were analyzed through the narrative thematic analysis method. The thematic narrative analysis found five major themes, influence on the priestly identity, value-oriented life, purpose in life, priestly celibacy and challenges in the priestly ministry and 46 subthemes for the participants priestly identity narratives. For relational autonomy, the study found five major themes, impactful childhood, the influence of priestly formation, nterpersonal relationships, relationship with the person in authority and decision making and 42 subthemes. For attachment God, it found six major themes, God as an attachment figure, seeking and maintaining proximity to God, God as a haven of safety, God as a secure base, newlineperceiving God as stronger and wiser, and individual differences in attachment to newlineGod, and 24 sub-themes. The study results revealed strong support for the newlinecorrespondence pathway, as the majority of the participants had narratives of newlinecorrespondence between the attachment to their parents and their attachment to God. newlineIt also found evidence for the theme of compensation in three participants narratives. The qualitative comparison between the groups found that for 19 sub-themes for priestly identity, 20 sub-themes for relational autonomy and 13 sub-themes for newlineattachment to God, the priests from the structured ministry settings differed from the priests from the semi-structured ministry settings. -
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 newlineEnhancement 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 newlinethe 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 newlinethe state syllabus and English medium of instruction, which are situated in South Bengaluru were selected. Initial screening consisted of an assessment of SLD and newlineintelligence to select participants. Out of 100 students with SLD, 50 students each were randomly allocated to experimental and control groups. The intervention programme consisted of creativity enhancement activities such as drawing, bridge construction, sand art, best out of waste, and find a friend. Baqer Mehdi Test of Creative Thinking and Depression Anxiety Stress Scale at were used as assessment tools and measured the study variable before, after and three months after the intervention. newlineResults showed CrEP could improve non-verbal newlinecreativity: Elaboration and Self-esteem. Similarly, this intervention could reduce depression. CrEP is useful in helping adolescents with SLD to explore and nurture their creativity, which would help them build their self-esteem and reduce the risk of mental health problems. -
Investigations on plasma sprayed Yttria stabilized zirconia thermal barrier coatings on Al-11si
6-8% Yttria Stabilized Zirconia, (Y2O3-ZrO2), typically known as 8YPSZ, Thermal Barrier Coatings (TBCs) when applied via Electron Beam Physical Vapor Deposition (EBPVD) finds wide application in aerospace engineering. TBCs, applied on aero turbine super-alloy blades protect them from the high operating temperature environment and permit reduction in the required amount of cooling air, thereby improve engine performance and efficiency / component life. Likewise, 8YPSZ TBCs are widely used in larger components of the power generation turbines as well. In addition to aerospace, TBCs also find applications in automobiles and many other newlineengineering fields where high temperature and protection to metals is involved. Though a good amount of published literature is available on the 8YPSZ TBCs on super alloys (high temperatures alloys used in jet newlineengines), the same on TBCs on Al-11Si alloys (frequently used in automotive components) is very limited; even though the potential of this alloy in the automobile industry is enormous.In this research work, results from thermal barrier coating qualifications on a popular aluminium based alloy used in the automobile industry (removed from diesel engine piston), i.e. aluminium-11% silicon newline(Al-11Si) alloy is presented. Detailed coating qualification tests were performed on the Al-11Si alloy substrates with the 8YPSZ TBCs on them which comprised of material assessments at room temperature and higher newlinetemperatures. The performance of an actual multi (four) cylinder diesel engine incorporated with TBC coated pistons also was evaluated and compared with the performance of the baseline engine (without any coated newlinecomponents). Thus, the concept of Low Heat Rejection (LHR) engine was also assessed in this research work. Commercial plasma sprayable powders of 8YPSZ (METCO 204NS, newlineUSA) were plasma spray coated (TBC deposition) by employing an Atmospheric Plasma Spray (APS) system on substrates previously coated with Nickel Aluminide (NiAl) (AMDRY 956) plasma sprayable bond coat newlinepowders. -
Predictive analytics for cardiac arrhythmia using machine intelligence
Myocardial Infarction (MI) is the primary cause of death worldwide. MI occurs when a plaque buildup in the inner surface of the coronary artery suddenly ruptures and prevents the blood flow. A heart attack is medically termed as MI. It is the irreversible damage caused by the prolonged ischemia. Ischemia is nothing but the heart organ doesn t get enough blood and oxygen which is also termed as coronary artery disease or coronary heart disease. The heart gets damaged if it has not received enough blood or oxygen. In connection to the damage of the heart, arrhythmia would occur. Arrhythmia is the problem based on the heart rhythm or rate of the heartbeat. Tachycardia, when there is a fast beat in the heart. Bradycardia, when the heart beats too slow. The common type of arrhythmia is atrial fibrillation. The great concern is that the patient who has arrhythmia has to be treated immediately. They lose consciousness in a few minutes when the heart is not pumping enough blood mainly to the brain. Death occurs when the patient is not given emergency treatment. newline Treatment which is included in the emergency is defibrillation and Cardiopulmonary Resuscitation (CPR). CPR is an emergency procedure which is combined with the chest compressions. It is through artificial ventilation which gives manual effort, preserves the brain functions until further treatment for the restoration of spontaneous blood circulation. The common symptoms of sudden cardiac death are chest pain, shortness of breath, severe wheezing, irregular heartbeats, fainting etc. newlineHeart Scar tissue which is not like heart muscle. It doesn t contrast like the normal heart muscle. Heart muscles get damaged for the heart attack patient based on the time of the treatment. The damage of the heart is based on the blockage of the artery. Arrhythmia can be predicted based on the volume of the scar region in the heart. Arrhythmia patients are treated by fixing Implantable Cardioverter Defibrillator (ICD). -
Implementation of speech recognizer and synthesizer for the physically challenged
Speech Recognition and Speech Synthesis are two complementary technologies that are used in systems to which the human voice serves as input or output. People with physical, motor disabilities prefer systems that can be driven by their voice than using the strenuous, usual and standard input-output devices such as keyboard, mouse and monitor. Solutions under the umbrella of Assistive Technology are designed to support people with disabilities to overcome the difficulties in handling their diurnal chores. Present-day commercial speech processing systems have received wider customer acceptance, yet not suitable for people with speech disabilities. It is observed that present-day speech recognizers fail to recognize voices with distortions, misrepresentations and deformations. The unintelligibility of the input voice limits the use of off-the-shelf speech processing products by the speech-impaired user community. In such scenarios, the speech processing systems require alterations to become suitable for the specialised user group. Techniques of adaptation are popular in the field of speaker recognition, which can be applied in the domain of Augmentative and Alternative Communication (AAC). The main aim of this research is to model a speaker adaptive system for the speech-disabled users with articulation disorders and neurologically-based disorders due to illnesses like cerebral palsy. The problem context for this research work is two-fold: accepting the incomprehensible speech input and transforming the same into a more understandable speech. The first portion is to adapt a speech recognizer and verify the recognition accuracy; the second portion is to substitute the recognized words with a better- comprehensible voice. Due to the medical requirements of the research subjects, collecting and using live speech data of individuals is an onerous task with complex infrastructure. Also, the collection and storage of patients data are restricted by ethical procedures. Hence, the data created by various Universities, following the standard procedures in a noise-free environment are used for this research work. Experiments are conducted on the voice data sets in order to improve the recognition accuracy for speakers uttering individual words. The Speech Recognizer is implemented using Hidden Markov Models and Speech Synthesizer is implemented using a pattern-searching algorithm on a database with text input and voice output (concatenative synthesis). The adaptation techniques, viz., Maximum Likelihood Linear Regression (MLLR) and Maximum A Posteriori (MAP) are applied in a pipeline with adjusted language model and pronunciation dictionary. This has reduced the Word Error Rates (WER) of recognizing the incoherent speech. In the process of adaptation, the parameters of the acoustic model of a generic speech recognizer are altered using the feature vectors generated from the training data set applying maximum likelihood linear regression. Parameters of this updated model are then used as informative priors to MAP adaptation. Speech Synthesizer, i.e., the Text-to-Speech system then translates the recognized text into a more-intelligible voice which is clearer to the listeners. The simulation with test data sets measured the effectiveness of the combined algorithm proposed here; it produced improvements in recognition accuracy from 43% (for a speaker with 93% speech intelligibility) to 90% (for a speaker with 2% speech intelligibility). An analysis of the improvement in recognition accuracy and speed of recognition for each speaker reveals that the proposed methodology is more effective for severely dysarthric speakers than those with less speech impairments, making the proposed model socially significant. -
A search for a grounding source in interpersonal relationships through metaxology in the select novels of bernard malmud
This research examines interpersonal relationships in the select novels of newlineBernard Malamud from a metaxological perspective. By examining the formation of newlinethe community through individuals where there are agapeic service and transformation newlineof individuals, it attempts to bring out the relevance of metaxological relationships that newlinegive importance to dialogue, ethical relationships and love. It is essential to understand the space between interpersonal relationships to lead a meaningful life in the contemporary world. It explores to ascertain whether human beings attain fulfilment in the community through transformation. This thesis addresses the issues that are relevant to the novelist in the context of Jewish identity and assumes that this study is essential since the study informs us about the interpersonal relationships which are very relevant newlinein today s context. This study claims that the interpersonal relationships portrayed in newlinethe novels of Malamud are metaxological because it affirms the self and transcends newlinetowards the other and forms a community where there is agapeic love and service. This newlineresearch claims that interpersonal relationships attain its fulfilment through newlinemetaxological relationships. This mode of interpersonal relationships is relevant since newlineit enables us to understand many existing problems between people, culture and nations, newlineand to find a solution to it. The question of how to maintain a proper relationship with newlineother human beings by giving equal importance to the individuals who are involved in the relationship is prominent today. The analysis of the novels based on metaxology newlinechanges our existing understanding of the interpersonal relationships and gives a new newlinedimension to it. -
Effectivrness of family centered psychosocial intervention programme for primary caregivers of the children with cerebral palsy
Cerebral palsy is one of the multiple disabilities affecting 2 to 2.5 per thousand new born babies in India. It usually affects both individual and families. Though care giving is a normal part of being the parent of a child, caring a child with special needs takes on an entirely different life perspective when a child with disabilities, and especially one with multiple disabilities like cerebral palsy which have an effect on long-term dependence. The task of rearing and caring for a child with complex disabilities like cerebral palsy at home might be a great challenge for parents. The aim of the study is to determine the effectiveness of family centered psychosocial intervention programe for the primary caregivers of children with cerebral palsy. Objectives are to assess anxiety, stress, family burden and perceived social support, and to determine the newlineeffectiveness of family centered psycho social intervention programme on primary caregivers of the children with cerebral palsy. The study followed before and after research experimental research design without control group. The sample of this study consisted of thirty five mothers of the children with cerebral palsy. The heterogeneous socio demographic background was drawn for the present study. The results revealed that extent of psycho social problem was present in the domains of anxiety, stress, family burden and perceived social support among mothers. It also revealed newlinethat the extent of psycho social problems was significantly reduced in the domains of newlineanxiety, stress and family burden and increased perceived social support after family centered psycho social intervention programme. It is indicated that the family centered viji psychosocial intervention is effective in psychosocial domains of the primary caregivers of the children with cerebral palsy. -
Synthesis of Benzothiazinones Benzothiazines and Their Selenium Analogues Through Novel Synthetic Routes
Benzo fused N-heterocyclic scaffolds containing oxygen, sulphur or selenium have found wide interest in the field of drug-discovery. Among these N-heterocycles, benzothiazine, benzoxazine, benzoselenazine and benzothiazinone derivatives are a unique class of compounds and have a larger scope towards the development of efficient and simple synthetic methodologies for their synthesis with readily available substrates. newlineDuring the course of the present thesis a convenient and simple synthetic procedures were developed for the synthesis of benzothiazines, benzoxazines, benzoselenazines and benzothiazinones in an onepot methodology. 2-aryl/alkyl substituted 1,3-benzothiazines and selenazines were synthesized by reacting 2-amino benzyl alcohols and thio or seleno benzamides in the presence of T3P.A reagent controlled methodology was developed for the synthesis of 2-amino substituted 1,3-benzothiazines and oxazines. Initially, various 2-amino benzylalcohols are reacted with newlineisothiocyanates to form the corresponding thioureas. The formed thioureas undergo newlinecyclodehydration in the presence of T3P to yield 2-amino substituted 1,3-benzothiazines newlineand on the other hand molecular iodine facilitates desulfurization of the thiourea to yield 2-amino substituted 1,3-benzoxazines. 2-amino substituted 1,3-benzothiazinones were synthesized by reacting anthranilic acids and isothiocyanates in the presence of EDC.HCl. 2-aryl substituted 1,3-benzothiazinones were synthesized by employing thiobenzamides in the presence of T3P. All the compounds synthesized were characterized by 1HNMR, 13C, Mass spectroscopic (LCMS, HRMS) analysis. Docking studies against TANKYRASE-1 enzyme for colorectal cancer (CRC) and antibacterial studies were also discussed. -
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. -
Identification and standardization of counsellor competencies for master level counsellor education programs in india
Counselling psychology programs in India have been criticized for being poor replicas of newlineconcepts that have originated in western cultures . The lack of Indian models has been quoted as a drawback indicating that trainees are not necessarily competent to provide effective counselling services. The present study aimed at identifying and standardizing competencies for post graduate counsellor training in India based on local needs.The study employed a mixed methods design with four phases. In the first phase, a list of key occupational tasks were drawn up through a systematic review of literature and interviews with three expert practitioners. The second phase was the development of a counsellor competency list which outlined the various competencies required to fulfil the key occupational tasks determined in the previous stage. Seventy one competencies were identified and the list was then given for newlineexpert validation. In the third phase, the competency list was given to 75 practicing newlinecounsellors across India who rated the competencies on a 5-point likert scale, based on its importance for post graduate counsellor trainees. In the final stage the prioritized competencies were analyzed using a concept development approach to identify core competencies required for master level counselling psychology trainees. The resulting core competencies were three foundational competency domains which included ethical practice, personal and professional development and cultural sensitivity. There were also three newlinefunctional competency domains which included the counselling process, the supervision newlineprocess and the promotion of counselling in India. Specific competencies under each domain were also listed along with behavioral indicators for the same. Thus the core competencies that counsellor trainees must develop to provide an effective service were identified and this has implications for training and practice. -
Empirical evidence on usability of mobiles in health care
Healthcare industry today has seen a lot of innovation and transformation like any other industry. With technological advancements it is growing leaps and bounds. One of the major challenges before the world today is effective management of diseases. The healthcare industry has been benefitted with the usage of information and communication technology (ICT). When integrated properly this technology has the potential to provide solutions to increased demands in quality, efficiency and improved workflow to help streamline healthcare operations. newlineDeveloping countries today are facing an increasing incidence of non communicable and communicable disease. M-health has the potential to extend help in both the fronts. Peep into various scenarios reveal that majority of diseases that kill people in the rural areas are curable with little information and this information dissemination can happen through mobiles which have a deeper penetration than any other technology. Most of the innovations in mobile technologies have not been evaluated beyond the pilot stage. Thus there is a need newlineto evaluate these interventions for them to become acceptable and usable by the patients and healthcare professionals. Various researchers time and again have argued the need for usability studies in healthcare innovations. This study is unique as it caters to both the aspects: technology acceptance and health technology acceptance and the context of usability. There is a large pool of studies which are available for technology acceptance but for healthcare context there has to be a mix of technology acceptance behavior and health behavior newlineacceptance. Researchers like Nutbeam (1998) have highlighted the importance of health behavior which is defined as activities which individuals take up irrespective of their health status for the objective of health maintenance even if such behavior may not be effective in the end. -
A study on socio-economic impact of remittances on forward migrants household of tibetan refugees in india
Migration and Development is an agenda of every country s economic policy in recent time. Migration has been linked to the flow of remittances influencing socio-economic development particularly of developing countries. Studies on remittances have also reflected its positive side having potential effect at all levels including micro (households), macro (country) and meso newline(community) levels.The existing literature on remittance manifested the prominent role of remittance in enhancing livelihood of receiving households. Empirical study conducted on developing economies concluded that households receiving remittances are better off than those of non-receiving newlinehouseholds. International remittance has a direct role on household s economy by raising newlinehousehold s standard of living. Remittances were used for household consumption activities including education, health, housing, accumulating assets leading to human capital development. Likewise, literature pointed out the potential role of remittance inducing investment in business and entrepreneurship development by employing households in becoming self-reliant. Further, remittance improves trust and network within households and community which indirectly helps poor in the community. Thus, it is evident from the previous literature that newlineremittances have enhanced human and financial and social capital development. However, the existing literature lacks information on remittance affecting livelihood in Tibetan newlinecontext. Hence, there is a need of in-depth study in this area of research which is latent and unexplored. In this study, it has made an attempt to understand the role of remittance on Tibetan refugee communities in India who rely on remittance as one of the major sources of income. The study focuses on the impact of remittances from forward migrants who migrated from India towards newlinewestern and European countries. They send remittances back home leading to socio-economic development in the country of origin. -
Study of linear and non-linear analyses of rayleigh-benard chandrasekhar convection 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 horizon- tal 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. Linear and Non-linear Analyses of Double Diffusive Chandrasekhar Convection with Heat and Concentration Source in Micropolar Fluid with Saturated Porous Media under Gravity Modulation. A thermosolutal convective study is carried out in the presence of externally imposed magnetic field and gravity modulation together with heat and concentration source in a micropolar fluid. This problem is analysed for both linear and non-linear cases by as- suming the strength of heat and concentration source same. The expression for critical thermal Rayleigh number and correction thermal Rayleigh number are obtained using regular perturbation method to understand the stability of problem. The transfer of heat and mass transport is investigated by deriving the eighth order Lorentz equation. It is found that internal Rayleigh number and Darcy number speeds up the onset of instabil-ity while the coupling parameter and Chandrasekhar number has a reverse effect. Also, the transfer of mass is more compared to the transfer of heat. Linear and Non-linear Analyses of Double Diffusive Chandrasekhar Convection Coupled with Cross-diffusion in Micropolar Fluid over Saturated Porous Medium The problem aims to find the effects of coupled cross-diffusion in a micropolar fluid over a porous medium, subjected to double-diffusive-Chandrasekhar convection. The usual stability analysis has been employed to determine the critical thermal Rayleigh number. Non-linear analysis is carried out by deriving the Lorentz equations using trun- cated Fourier series representation. Heat and Mass transport are quantified by Nusselt and Sherwood number respectively. Analysis related to the effect of various parameter are plotted and the result for the same are interpreted. As Dufour parameter increases, the diffusion of heat and solute takes place which increases the temperature difference and thereby delays the onset of convection by making the system stable. It is observed from the results that Dufour parameter and Soret parameter have opposite influence on the stability of the problem. Linear and Non-linear Analyses of Throughflow Effect on the Onset of Rayleigh-Benard-Chandrasekhar Convection in Micropolar Fluid with Porous Medium. The Rayleigh-Benard convection over a porous medium saturated with micropolar fluid is simulated via externally imposed magnetic effect. The stability of the system is ex- amined using linear analysis by the method of normal mode. The rate of heat and mass transport within the system is examined by deriving sixth order Lorentz equation using non-linear analysis. It is observed that by regulating the throughflow effect, the con- vection of the system can be controlled. Also, the pro-gravity and anti-gravity cases has a stabilizing effect on the system. From mathematical calculation, it can be seen that heat transfer rate is same for both pro-gravity and anti-gravity cases, because of the symmetric nature of the boundaries considered. Linear and Non-linear Analyses on the Effect of Time Periodic Boundary Temper- ature and Internal Heat Source in a Micropolar Fluid on the Onset of Rayleigh- Benard-Chandrasekhar Convection with Porous Medium The impact of temperature modulation at the boundaries over a surface containing voids that is soaked in micropolar fluid is investigated to understand the thermal instability of the convection exposed to magnetic effect and internal heating of the system. A small amplitude of perturbation is given to the system to analyse the thermal instability by performing a linear study through the method of regular perturbation, which yields Rayleigh number for unmodulated and modulated system. Three cases of study is car-ried out to inspect the vibrating temperature field at the boundaries, namely symmetric case where the temperature is modulated in-phase, asymmetric case where the temper-ature is modulated out-phase and the case where only the bottom wall temperature is modulated. The non-linear analysis is employed to find the heat in the system, using Lorentz model. The outcome of the study conveys that sub critical motion occurs dur- ing in-phase modulation while the out-phase modulation leads to a more stable system. Moreover, internal Rayleigh number hastens the onset of convection.