Intro -- 1 Introduction -- 1.1 Motivation and objectives -- 1.2 Thesis outline -- 2 Need for alternative frac-fluid -- 2.1 Environmental problems -- 2.2 Technical problems -- 2.3 Problem with public acceptance -- 2.4 Alternative frac-fluids -- 3 Light alkanes (C5-C10) -- 3.1 Properties of alternative fluid -- 3.2 Simulation in a fictive model to investigate phase behavior -- 4 Hydraulic fracture modeling -- 4.1 Brief overview of hydraulic fracturing -- 4.2 Mass and energy balance for flow in porous media -- 4.3 Space and time discretization -- 4.4 Numerical model -- 5 Model verification and application -- 5.1 Fracture initiation and propagation -- 5.2 Isothermal MM flow verification -- 5.3 Non-isothermal MM flow verification -- 5.4 Hydraulic fracturing in McCully tight gas reservoir, New Brunswick, Canada -- 6 Hydraulic fracturing optimization in a tight gas reservoir of Germany -- 6.1 Introduction -- 6.2 Model generation and verification -- 6.3 Production history match -- 6.4 Stress state -- 6.5 Important parameter analysis -- 6.6 Frac-fluid flowback -- 6.7 Design proposals -- 6.8 Comparison with previous fracture job -- 7 Rod-shaped proppants -- 7.1 Introduction -- 7.2 Fracture conductivity -- 7.3 Numerical model -- 7.4 Sensitivity analysis -- 7.5 Application -- 8 Conclusions -- 9 References -- Appendix A.
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The assumption of investor rationality had been central to developing an understanding of financial markets and decision outcomes. But the formation and consequent burst of tech-stock bubble changed the paradigm and shifted towards the behavioral interruption aspect of investor psychology. The study aimed to investigate the relationship of two heuristics and one emotional bias with financial decisions and the moderating effect of financial literacy on the said relationship. Primary data is gathered through questionnaire from 208 clients of national savings. Moderation analysis was done and the effect of biases on the financial decisions was found significant enough. Furthermore, financial literacy moderates this relationship positively only for heuristics but no moderation found for selfcontrol. The policymakers can design their financial instruments and strategies by keeping in view the implication of biases on investor's decision. Moreover, periodic financial literacy sessions can be arranged to create awareness among investors and advisors.
This research aims at testing and confirming existence of selected behavioral biases of investors that affect their decisions. Five behavioral biases affecting irrational behavior of investors were selected: overconfidence bias, illusion of control bias, confirmation bias and recency bias and optimism bias. Primary data was collected through a questionnaire from 300 investors from banks, insurance companies, stock exchanges etc. The results were obtained by employing a correlation and regression analysis for the presence of behavioral biases and to detect degrees of their influence on decision making. Correlation results indicate moderate association between behavioral biases and decisions of investors. Outcome of the research indicates that while making financial decisions investors are moderately affected by behavioral biases.
Purpose Aging is a complex and multifactorial process. This study aims to is focus on mattering in older people. Mattering is the feeling of being important to others in ways that give individuals the sense that they are valued and other people care about them. However, for many, aging brings about the loss of self-esteem, and they feel useless, deprived and unwanted. The authors have adopted the partial least square structural equation modeling technique and Self-Esteem Scale of Rosenberg for evaluating the level of self-esteem in senior citizens of Pakistan. The results reveal a strong association between the predictor and the criterion variables, supporting the view that the communal integration construct is the strongest determinant in old age. Based on the results, the authors can argue that socioeconomic status, social relationships and daily activities and have a direct association with the elderly people's self-esteem.
Design/methodology/approach The Self-Esteem Questionnaire by Rosenberg (Rosenberg, 1965) and the Quality of Life Questionnaire by Bowling (Bowling, Banister, Sutton Evans and Windsor (2002) are two tested tools that were used to collect the sample data from various neighborhoods of Peshawar. The sample consisted of respondents who were 60 years of age or older. The current study only included men who were 60 years of age or older because men make up a higher number of retirees in the district (84%) than do women. A total of 312 male volunteers, representing a various cadre of job, were recruited at random. The research population's data were gathered through convenience sampling. Only volunteers who appeared to be healthy in both body and mind were chosen as participants. When older people were unable to complete questionnaires, researchers helped them read the questions and then helped them write down their answers. Out of the 500 survey forms that were sent, 312 were properly completed and used for the analysis.
Findings The results of this study suggest that the happiness and well-being of retired seniors are not only influenced by their general activities, health and socioeconomic status but also more strongly by their psycho-social integration, such as their close and intimate relationships with friends, family and relatives. The findings, therefore, urge the incorporation of social integration aspects in mental health treatment programs and public health policies to support the psycho-social well-being of the elderly. Social relationship variables might become a common aspect of practice through medical, psychiatric and psychological screening and examination.
Research limitations/implications Due to the fact that research participants were selected from just one city – Peshawar – the results cannot be generalized. As a result, findings are less likely to apply to older persons who reside in other provinces due to sample selection. Future research will be conducted all around the nation, though, and it could produce more precise and broadly applicable findings. Only male respondents applied to the second limitation. Only male participants were sought due to socioeconomic differences, social and cultural obstacles and the small number of female retirees. Therefore, it limits the spectrum of the study.
Social implications An individual's self-esteem is made up of intrapersonal and interpersonal elements. Regarding policy intervention, the present effort will be a crucial step in helping the elderly understand the value of maintaining social networks and will encourage them to maintain close relationships with family and friends to safeguard their well-being in later life. On the other side, this research will help academics, politicians and thinkers better comprehend aging, perspectives of conduct and psychological and emotional viewpoints. One of the most important aspects of life that affects how old people feel about themselves is the support from social networks. Therefore, through raising awareness and fostering a favorable environment for the welfare and self-worth of senior individuals, politicians and society are expected to care for enriching the lives of the elderly. By highlighting the importance of communal support from a multidimensional aspect of a person, this study offers a wider perspective on self-esteem. With this in mind, the authors advise academics to adopt a fresh perspective on interpersonal mechanisms that ultimately aim to improve self-esteem and social support. Social support is a key factor in fostering or inhibiting self-esteem in the elderly and is a strong predictor of mental health. A society must take action to boost older people's communal integration to improve their quality of life.
Originality/value This study makes the case for a broader perspective on self-respect or esteem by suggesting that self-esteem may be seen in a broader context rather than in terms of limited characteristics. The authors offer an integrated model of self-esteem that conceptualizes it as an interpersonal phenomenon influenced by multiple vital aspects using various metrics of old age. Self-esteem was envisioned as the result of a number of factors, including social position, activities and interpersonal interaction "relationships with relatives, family, and friends." The authors' conceptual framework's goal is to comprehend the different ways that senior citizens' lives affect their sense of self-worth.
