Academic literature on the topic 'Mimetic pressures'
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Journal articles on the topic "Mimetic pressures":
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Amoako, Gilbert K., Anokye M. Adam, George Tackie, and Clement Lamboi Arthur. "Environmental Accountability Practices of Environmentally Sensitive Firms in Ghana: Does Institutional Isomorphism Matter?" Sustainability 13, no. 17 (August 24, 2021): 9489. http://dx.doi.org/10.3390/su13179489.
Abstract:
Operational activities of firms accumulate over time and adversely impact the environment, which, in turn, threaten the earth’s ecosystem and sustainable development agendas. Both internal- and external-specific pressures may play a crucial part in a firm’s decision to conform to environmental accountability practices (EAP). This paper examines the associations between institutional isomorphic forces and EAP among environmentally sensitive firms in Ghana. A representative sample of 166 environmentally sensitive firms were randomly selected and included in this study. A structured questionnaire was used to obtain relevant data for the analysis. Multiple regression models estimated the hypothesized crude and adjusted associations between EAP and isomorphic factors (mimetic, normative and coercive pressures). Initial adjustment with the isomorphic factors revealed significant associations of mimetic pressure which arises when companies engage in competition seeking superior performance and normative force with EAP but not coercive. A further control for the firm’s characteristics found a strong association of normative pressure with EAP. The findings suggest that mimetic and normative pressures may be essential in an attempt to stimulate EAP among environmentally sensitive firms in Ghana. Our results are broadly consistent with the predictions of institutional theory as it applies to EAP. Efforts to ensure environmental reporting among firms should strengthen normative and mimetic forces, particularly in the low- and middle-income settings.
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Arshad, Muhammad, Mariam Farooq, Sadia Afzal, and Omer Farooq. "Adoption of information systems in organizations." Journal of Enterprise Information Management 33, no. 2 (November 14, 2019): 265–84. http://dx.doi.org/10.1108/jeim-05-2019-0130.
Abstract:
Purpose The purpose of this paper is to determine the factors influencing the adoption of new information systems (IS) in organizations. Based on the institutional theory, this research proposes that organizations may induce their employees to adopt new IS by creating three types of institutional pressure: coercive, normative and mimetic. It is further argued that the effects of these three institutional pressures on employees’ new IS usage depend on their cultural orientations. Design/methodology/approach Model testing relies on data collected from 370 banking sector employees during the implementation of a new “customer relationship management” system. The hypothesized model was tested by using the structural equation modeling technique in MPlus 7.0. Findings The findings of this research reveal that institutional pressures (coercive, normative and mimetic) have positive effects on employees’ attitudes to using the new IS, which, in turn, positively influences their IS usage. In addition, collectivism strengthens the positive effect of coercive and normative forces on attitudes to using the new IS. Conversely, collectivism weakens the effect of the mimetic force on employees’ attitudes to using the new IS. Originality/value This research is among pioneering studies that explain the effect of institutional pressures (coercive, normative and mimetic) on employees’ IS usage. It is the first study of its nature that demonstrates that each of the three institutional pressures has differential effects on employees with highly collectivist orientations in comparison with employees with low collectivist orientations.
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Gunarathne, Nuwan, and Ki-Hoon Lee. "Institutional pressures and corporate environmental management maturity." Management of Environmental Quality: An International Journal 30, no. 1 (January 14, 2019): 157–75. http://dx.doi.org/10.1108/meq-02-2018-0041.
Abstract:
Purpose The purpose of this paper is to examine how corporate environmental management strategies at different environmental management maturity (EMM) stages are influenced by institutional forces in the service sector organizations of a developing country. Design/methodology/approach The authors used a multiple case study approach in this study. Institutional isomorphic pressures (coercive, mimetic and normative) at different EMM stages were used as the analytical framework. Findings The study finds coercive pressures largely shape the corporate environmental management strategies at the reactive stage while mimetic pressures have the greatest influence on the internal integration stage. Combined mimetic and normative pressures influence the environmental strategies at the external integration stage. Further, it emphasizes the importance of various institutional pressures in propelling the organizations in the developing countries to benefit from higher levels of EMM. Originality/value This paper offers a new theoretical approach that highlights the importance of considering the institutional influence of the top-down process of diffusion and simultaneous counter-process of invention by which the lower level organizational actors shape and change their environmental management practices for corporate EMM.
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Kung, LeeAnn, Casey G. Cegielski, and Hsiang-Jui Kung. "An Integrated Environmental Perspective on Software as a Service Adoption in Manufacturing and Retail Firms." Journal of Information Technology 30, no. 4 (December 2015): 352–63. http://dx.doi.org/10.1057/jit.2015.14.
Abstract:
In this study, we examine the influence of a firm's environmental factors on its intention to adopt software as a service (SaaS). We operationalized our assessment of a firm's environmental pressures as mimetic, coercive and normative pressures and examined the moderating role of perceived technology complexity. Mimetic forces are pressures to copy or emulate other organizations’ activities, systems or structures. Coercive pressures are formal or informal pressures exerted on organizations by other organizations upon which they are dependent. Normative forces describe the effect of professional standards and the influence of professional communities on an organization. We empirically tested our research model using data from 289 valid survey responses. The results provide support for the assertion that there are both significant direct and interaction effects that influence a firm's SaaS adoption intention. Most important was the significant interaction effects between mimetic pressure and perceived technology complexity. This suggests that the complex relationships proposed by institutional theory and diffusion of innovation help to describe how environmental pressures and perceived technology complexity combine to affect intention to adopt an emerging technology. The theoretical contributions of this study are (i) we integrated, tested and validated mature theories in today's supply chain era with a new but rapidly diffusing technology, (ii) and we answered the call to include practical technology artifacts in information systems studies. From a practical perspective, through this work managers may develop a better understanding regarding environmental factors and whether or not they should consider these issues for their firm when formulating an intention to adopt SaaS.
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Fang, Qinying, Liwen Chen, Dalin Zeng, and Lin Zhang. "Drivers of Professional Service Model Innovation in the Chinese Construction Industry." Sustainability 11, no. 4 (February 13, 2019): 941. http://dx.doi.org/10.3390/su11040941.
Abstract:
Professional service in China is facing challenges due to the rapidly changing built environment. The environment forces the construction industry to reconsider professional service model for thriving, while the life cycle professional service model has significant implications for value addition in professional system. However, literature that provides quantifiable information for practitioners and researchers to better understand drivers of professional service model innovation (PSMI) is scarce. Based on innovation diffusion literature and institutional theory, this study examines how PSMI is influenced by institutional pressures (including coercive, mimetic, and normative pressures) in the construction industry. The researchers conducted an industry-wide survey in China using structural equation modeling to analyze the acquired data. Data analyzing demonstrates that both coercive and mimetic pressures prominently influence the life cycle of PSMI. However, this study reveals that normative pressure does not significantly influence PSMI. Results indicate that the owner’s cognition plays an important mediating role between institutional pressures and PSMI. The findings contribute to understanding how different types of institutional pressures can be better steered to facilitate PSMI in the construction industry and furthering knowledge on PSMI mechanisms for new professionalism cultivation in the industry to realize sustainable development of professional system.
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Zhang, Guangling, Chenchen Liu, and Hui Wang. "Institutional pressures and the extent of cross-channel integration: the moderating effect of enterprise's capabilities." Journal of Contemporary Marketing Science 3, no. 1 (April 14, 2020): 113–33. http://dx.doi.org/10.1108/jcmars-12-2019-0046.
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PurposeCurrently, the issues of cross-channel integration (CCI) have become the attentive focus. However, little research based on institutional theory details the drivers of and obstacles to adopt CCI strategy. Combined with resource-based view (RBV) and institutional theory, this thesis studies the effect of institutional pressures on the manufactures' extent of CCI, through exploring the moderating effects of firm's technology competence and relationship governance capabilities on the relationship between institutional pressures and the extent of CCI.Design/methodology/approachThe survey data of 249 valid research samples were obtained from Chinese manufacturing enterprises. Statistical software such as SPSS 22.0 and AMOS 18.0 was used to analyze the data and test the conceptual model and relevant research hypotheses from an empirical perspective.FindingsThe results of empirical study from 249 manufacturers indicate that the mimetic, coercive and normative pressures perceived by enterprises can significantly promote their extent of CCI; relationship governance capabilities attenuate the positive impact of mimetic pressures on the extent of CCI, but strengthen that of normative pressures on the extent of CCI; besides, technology competence can attenuate the positive effect of mimetic pressures on the extent of CCI, but enhance that of normative pressures on the extent of CCI.Originality/valueFew studied the impact of the interaction of internal capabilities and external institutional pressures on CCI of enterprises. This study combines institutional theory and resource-based view to fill the theoretical gap in this regard.
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Swilley, Esther, Charles F. Hofacker, and Bruce T. Lamont. "The Evolution from E-Commerce to M-Commerce." International Journal of E-Business Research 8, no. 1 (January 2012): 1–16. http://dx.doi.org/10.4018/jebr.2012010101.
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This study focuses on the isomorphic pressures and firm capabilities that affect strategic decision-making in organizations in the context of m-commerce. The authors take into consideration that the three isomorphic forces set forth by DiMaggio and Powell (1983), mimetic, coercive and normative pressures, work together to impact strategic decisions based on stakeholder influences. This study found that the effects of mimetic pressures seen in results of previous studies may be the result of model misspecification. Findings also indicate that firms want to leverage capabilities gained from e-commerce in the m-commerce wave in order to gain a competitive advantage in the marketplace
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Barac, Karin, Philna Coetzee, and Marianne Van Staden. "Convergence towards internal audit effectiveness in the BRICS Countries." Journal of Economic and Financial Sciences 9, no. 2 (December 18, 2017): 609–29. http://dx.doi.org/10.4102/jef.v9i2.61.
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Internal auditing has been called upon to enhance its value proposition for organisations and one way of doing this is to demonstrate its effectiveness. By using the responses of participants from the BRICS countries on the 2010 global Common Body of Knowledge survey of the Institute of Internal Auditors in conjunction with the elements of the Internal Audit Capability Model this study examines the convergence towards internal audit effectiveness by the BRICS countries. The study uses a neo-institutional perspective to demonstrate how internal auditing in the BRICS countries has responded to coercive, normative and mimetic pressures to demonstrate effectiveness. The study shows that coercive pressures for internal auditing exist in all the BRICS countries, but owing to the voluntary internal audit structure in Russia, such pressure appears to be lower in that country. Using professionalism to demonstrate normative pressures, the emphasis on internal audit in the King III report of South Africa was evident. The results of this study seem to indicate that South Africa has responded more to mimetic pressures in relation to people management, professional practices and organisational relationships than other BRICS countries.
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Mutea, Harun Kaumbuthu, Thomas Anyanje Senaji, and Nancy Gacheri Rintari. "Influence Of Regulative Pressures On Strategy Implementation In Public Secondary Schools In Selected Counties In Kenya." Advances in Social Sciences Research Journal 8, no. 4 (April 24, 2021): 309–26. http://dx.doi.org/10.14738/assrj.84.9987.
Abstract:
Preparation of strategic plans and their implementation in public secondary schools is mandatory for all schools in Kenya. However, the implementation is a challenge to the majority of the schools hence the need to investigate the factors that influence it. Being a relatively new management practice in public secondary schools, empirical studies in this area are limited. Drawing from the institutional theory, we conducted a descriptive structured self-administered questionnaire survey to determine the influence of regulative pressures on strategy implementation in public secondary schools. We further, examined the moderating effect of mimetic pressures on this relationship. We found that public secondary schools experienced moderate regulative pressures from the government to implement strategies and that through binary logistic regression model, regulative pressure significantly predicted the probability of successful strategy implementation (Wald = 13.682, df = 1, p < .001, exp (B) = 3.393). However, mimetic pressures did not significantly moderate the relation between regulative pressure and strategy implementation (Wald = .098, df = 1, p = .754 > .05, exp (B) =.737). Theoretically the study contributes to the scarce empirical literature on strategy implementation from the institutional theory perspective compared to strategy formulation. Practically, the study draws attention of stakeholders to the less investigated factors that influence strategy implementation namely: the regulative pressures. These findings have implications for government to strengthen the monitoring of public secondary schools to increase the likelihood of successful strategy implementation in public secondary schools.
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Yang, Chung-Shan. "Evaluating the use of alternative maritime power in Taiwan." Maritime Business Review 1, no. 3 (August 31, 2016): 208–24. http://dx.doi.org/10.1108/mabr-08-2016-0016.
Abstract:
Purpose The purpose of this study is to empirically evaluate the impacts of institutional pressures on the use of alternative maritime power (AMP) and which in turn enhance environmental performance in the maritime shipping context. Design/methodology/approach Factor analysis was used to identify the key coercive pressure, normative pressure, mimetic pressure, AMP practice and green performance dimensions. The author collects data from a survey of 184 maritime shipping operators in Taiwan and applies a structural equation modelling (SEM) to test the research hypotheses. Findings The findings show that AMP practice act as mediator variables between institutional pressures and environmental performance. Originality/value Theoretical contributions and managerial implications are drawn to help maritime shipping operators to improve environmental performance.
Dissertations / Theses on the topic "Mimetic pressures":
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Kombe, Sheila. "The role of innovation and institutional pressures in sustainable packaging." Diss., University of Pretoria, 2021. http://hdl.handle.net/2263/81318.
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There is an under-developed scale of research conducted on sustainable production and consumption of environmentally friendly packaging Tanzania. Using the main concepts from institutional theory along with the diffusion of innovation model, this paper will examine the environmentally friendly packaging innovations in the Tanzanian food and beverage industry. The purpose of this research is to understand the factors that enable adoption. It suggests that mimetic, coercive and normative pressures exist within manufacturing firms that can regulate and coordinate solutions. A level of understanding of perceived fidelity and perceived effort required were established to develop conditions where firms can create strategies for the adoption environmentally sustainable packaging. The research setting is in the manufacturing industry. The data gathered for this study was collected by distributing a survey to respondents using convenience and snow-balling technique. Manufacturing businesses and packaging suppliers of the food and beverage industry participated. The respondents were requested to forward the survey by passing on the google form link to business owners, company CEOs, CFOs, COOs. 29 firm responses from the target population were measured to establish the pressures that they face and their intention to adopt. After applying regression analysis to the data, coercive pressure and intention to adopt with perceived fidelity as a moderator suggested a significant relationship. Similarly, perceived effort required positively moderated the relationship between mimetic pressure and intention to adopt. However, the results showed that no significant relationship from each of the three isomorphic constructs namely normative, mimetic and coercive and intention to adopt. This was contradictory to previous researchers of isomorphic pressures and should be subjected to future research.Mini Dissertation (MBA)--University of Pretoria, 2021.
Gordon Institute of Business Science (GIBS)
MBA
Unrestricted
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Yu, Jiayin, and Fenfen Pan. "Influence of External Pressures on the Digital Transformation of Institutions." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414607.
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More and more institutions have begun to implement digital transformation. Identifying the reasons behind institutions’ digital transformation can help them make the right strategies. This thesis focuses on the digital transformation taking place in the financial industry and uses organizational institutionalism theory to analyze the influence of external pressures, and what responsible strategies institutions may adopt. We use qualitative methods to conduct the research. We interview eight employees from different institutions in the financial industry in China. Our findings show how coercive, mimetic, and normative pressures affect these financial institutions differently, and in responding to these pressures, these financial institutions develop office management systems and new digital products and services. The study evaluates to which extent the new digital reality fits the theory of the influence of external pressures on institutions. For managerial practice, the findings provide guidance in describing and diagnosing external pressures that drive digital transformation, and in coping with these pressures appropriately to formulate effective digital transformation strategies.
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Tsykolanov, Vasyl. "Understanding machine learning adoption: the moderating effects of process sophistication and mimetic pressures." Master's thesis, 2020. http://hdl.handle.net/10362/97874.
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Dissertation presented as the partial requirement for obtaining a Master's degree in Information Management, specialization in Knowledge Management and Business IntelligenceMachine learning (ML) gives organizations the power to predict the future, and this has become a core element of modern enterprises. Three contexts, grounded in the technology-organizational-environmental (TOE) framework, were scrutinized to explain ML adoption. Data collected from 319 firms are used to test conceptual model. Additionally, this study investigates the use of process sophistication and mimetic pressures as moderators. The significance of the technological, organizational, and environmental contexts for ML adoption is confirmed. Furthermore, the moderator influence of mimetic pressures and process sophistication between the technological and organizational context and ML adoption was confirmed.
Books on the topic "Mimetic pressures":
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Rasula, Jed. Acrobatic Modernism from the Avant-Garde to Prehistory. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198833949.001.0001.
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This is a book about artistic modernism contending with the historical transfigurations of modernity. As a conscientious engagement with modernity’s restructuring of the lifeworld, the modernist avant-garde raised the stakes of this engagement to programmatic explicitness. But even beyond the vanguard, the global phenomenon of jazz combined somatic assault with sensory tutelage. Jazz, like the new technologies of modernity, recalibrated sensory ratios. The criterion of the new as self-making also extended to names: pseudonyms and heteronyms. The protocols of modernism solicited a pragmatic arousal of bodily sensation as artistic resource, validating an acrobatic sensibility ranging from slapstick and laughter to the pathos of bereavement. Expressivity trumped representation. The artwork was a diagram of perception, not a mimetic rendering. For artists, the historical pressures of altered perception provoked new models, and Ezra Pound’s slogan “Make It New” became the generic rallying cry of renovation. The paradigmatic stance of the avant-garde was established by Futurism, but the discovery of prehistoric art added another provocation to artists. Paleolithic caves validated the spirit of all-over composition, unframed and dynamic. Geometric abstraction, Constructivism and Purism, and Surrealism were all in quest of a new mythology. “Making it new” yielded a new pathos in the sensation of radical discrepancy between futurist striving and remotest antiquity. The Paleolithic cave and the USSR emitted comparable siren calls on behalf of the remote past and the desired future. As such, the present was suffused with the pathos of being neither, but subject to both.
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Mukherji, Subha. ‘The action of my life’. Edited by Michael Neill and David Schalkwyk. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780198724193.013.17.
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This essay will put pressure on moments at generic thresholds—in particular, that between tragicomedy and tragedy—as a way of understanding the stakes in Shakespeare’s interrogation of genre, and its implications for representation and response. The boundaries of tragedy are no less problematic than those of comedy. How does the notion of tragicomedy trouble these edges further? But it is neither tragedy nor tragicomedy alone that effects Shakespeare’s ethical and affective questioning of his art. As his career progresses, each genre helps the other sharpen its own claims on mimetic responsibility. A consideration of his tragic art in relation to tragicomedy—both in his consciously mixed-mode plays and in his inscription of what look like generically incompatible moments within his tragedies—illuminates the urgency of these experiments.
Book chapters on the topic "Mimetic pressures":
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Sánchez-Fernández, María Dolores. "The Influence of Institutional Environment on Quality Practices and Its Impact on Regional Development." In Advances in Electronic Government, Digital Divide, and Regional Development, 165–87. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9567-2.ch008.
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This chapter studied the institutional influence associated to quality practices in hotels. The aim was to interpret whether it was the normative, coercive or mimetic pressures (Institutional pressures) that influenced the three, four and five star hotels in north of Portugal. In order to accomplish these objectives the author used an investigation model that connects institutional context pressures with quality practices and quality practices with legitimacy. To study used the Institutional Theory as theoretical reference.
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Bozan, Karoly, Bill Davey, and Kevin R. Parker. "Social Forces that Influence Health IT Use Behavior of the Elderly." In Handbook of Research on Healthcare Administration and Management, 369–83. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0920-2.ch021.
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The social forces that influence patient portal use behavior among the elderly are not well understood. Using both institutional theory and the Unified Theory of Acceptance and Use of Technology, the proposed model examines three social environmental factors ? normative, mimetic, and coercive forces ? within a Health Information Technology (HIT) context. An empirical study involving 117 subjects in the United States was used to test the proposed model. Using the partial least squares method, mimetic and coercive pressures were found to significantly influence patient portal use behavior. These findings indicate that older people follow not only their providers' advice, but also follow the behavior of respected, higher-status peers from their network. Normative pressure was not found to be significant, implying that older people do not follow the bandwagon effect.
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Sánchez-Fernández, María Dolores. "The Influence of Institutional Environment on Environmental Practices and Its Impact on Regional Development." In Handbook of Research on Entrepreneurial Ecosystems and Social Dynamics in a Globalized World, 437–59. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3525-6.ch019.
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This chapter studied the institutional influence associated to environmental practices in hotels. The aim was to interpret whether it was the normative, coercive or mimetic pressures (Institutional pressures) that influenced the three, four and five star hotels in north of Portugal and Galicia (a gender perspective). In order to accomplish these objectives, the author used an investigation model that connects institutional context pressures with environmental practices and environmental practices with legitimacy. To study used the Institutional Theory as theoretical reference.
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Sánchez-Fernández, María Dolores, Rosa María Vaca-Acosta, and Alfonso Vargas-Sánchez. "Socially Responsible Practices in Hotels." In Corporate Social Responsibility in the Hospitality and Tourism Industry, 28–45. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9902-1.ch003.
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The objective of this study is to analyze the influence of institutional pressures (normative, coercive and mimetic) according to gender in the implementation of social responsibility in hotels. The object of this study is three, four and five-star hotels located in the Euro region (Galicia and North of Portugal). To achieve these objectives a quantitative study is carried out. The proposed model of research; the Technical Partial Least Square (PLS), methodology based on Structural Equations Models (SEM) using the software Visual-PLS has been applied. A questionnaire consisting of existing validated scales was drawn up and used for the collation of data.
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"C Total Force Due to Pressure Gradients." In Mimetic Discretization Methods, 215–16. Chapman and Hall/CRC, 2013. http://dx.doi.org/10.1201/b14575-18.
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Bezzant, Rhys S. "The Mimetic Way." In Edwards the Mentor, 81–113. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190221201.003.0004.
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Edwards’s chief theological justification for mentoring arises from the doctrine of the beatific vision, or the significance for our present life, ministry, and spirituality of meeting Christ face to face at the end of the age. Visual imagery is a constant feature of Edwards’s teaching, which is here combined with his approach to the image of God in human beings, the Christological nature of imitation, and the pressure points of modernity. The first things, near things, and last things are signposts to Edwards’s understanding of the power of mentoring in human experience. We see how integrative the mentoring project is for him, in as far as it obviates the fragmenting narrative of the Enlightenment. Edwards’s theological and cultural reflex is both to resist and appropriate modern categories of thought.
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Schreiner, Christopher S. "Redefining the Proxemics of the Mentorship." In Advances in Educational Marketing, Administration, and Leadership, 81–100. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7438-5.ch006.
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The sociopolitical controversies on campus that have resulted in “safe spaces” have pressured traditional structures based on proxemics, such as the mentorship, to reinvent themselves or disappear. In the chapter, “proximity” itself is defined not in terms of spatial contiguity but as an attentional structure by which the mentee achieves an intimate understanding at a distance of the objective achievements in teaching and writing that distinguish her mentor and other role models and that provoke acts of creative mimesis and exegesis by the mentee. Inspired by the ancient Stoic practice of the “care of the self” as explicated by Michel Foucault, the crux of the redefined mentored relation is not inculcating knowledge but guiding the growth of the mentee's critical consciousness in preparation for a career and a life well-lived, befitting a noble spirit. Since the focus of the redefined mentored relation privileges distance and objective spirit (via the critical study of works) over personal interaction, the scholarly autonomy of the mentee is a noteworthy learning outcome.
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"Connexin-mimetic peptides: influence on nitric oxide synthase- and cyclooxygenase-independent renal vasodilatation, basal renal blood flow and blood pressure in the rat." In Edhf 2002, 104–12. CRC Press, 2001. http://dx.doi.org/10.1201/b12563-16.
Conference papers on the topic "Mimetic pressures":
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Latifi, Neda, Hossein K. Heris, Siavash Kazemirad, and Luc Mongeau. "Development of a Self-Oscillating Mechanical Model to Investigate the Biological Response of Human Vocal Fold Fibroblasts to Phono-Mimetic Stimulation." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38970.
Abstract:
The human vocal folds are subjected to complex dynamic biomechanical stimulation during phonation. The aim of the present study was to develop and evaluate an airflow-induced self-oscillating mechanical model, i.e., a bioreactor, which mimics the geometry and the mechanical microenvironment of the human vocal folds. The bioreactor consisted of two composite synthetic vocal fold replicas loaded into a custom-built airflow supplied tube. A cell-scaffold mixture was injected into cavities within the replicas. The folds were phonated using a variable speed centrifugal blower for two hours a day over a period of seven days. The static and dynamic subglottal pressures and the dynamic supraglottal pressure were monitored. A similar bioreactor without mechanical excitation was used as positive control. The cell-scaffold mixture was harvested for cell viability and collagen type I immunohistochemistry tests seven days after injection. The flow-induced self-oscillations of the vocal fold replicas were shown to produce mechanical excitations that are typical of those in the human vocal fold lamina propria during phonation. The results confirmed that human vocal fold fibroblasts survived inside the present bioreactor, and maintained cellular functions of protein production.
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Skaflestad, B., and S. Krogstad. "Multiscale/Mimetic Pressure Solvers with Near-well Grid Adaptation." In 11th European Conference on the Mathematics of Oil Recovery. Netherlands: EAGE Publications BV, 2008. http://dx.doi.org/10.3997/2214-4609.20146387.
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Chen, Litian, Junhong Zhong, and Saige Xue. "R & D Intensity and Corporate AI Strength Attention: The moderating role of Coercive Pressure and Mimetic Pressure." In 2021 International Conference on Public Management and Intelligent Society (PMIS). IEEE, 2021. http://dx.doi.org/10.1109/pmis52742.2021.00079.
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Mohsin, Adel, Abdul Salam Abd, and Ahmad Abushaikha. "Modeling Condensate Banking Mitigation by Enhanced Gas Recovery Methods." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21491-ms.
Abstract:
Abstract Condensate banking in natural gas reservoirs can hinder the productivity of production wells dramatically due to the multiphase flow behaviour around the wellbore. This phenomenon takes place when the reservoir pressure drops below the dew point pressure. In this work, we model this occurrence and investigate how the injection of CO2 can enhance the well productivity using novel discretization and linearization schemes such as mimetic finite difference and operator-based linearization from an in-house built compositional reservoir simulator. The injection of CO2 as an enhanced recovery technique is chosen to assess its value as a potential remedy to reduce carbon emissions associated with natural gas production. First, we model a base case with a single producer where we show the deposition of condensate banking around the well and the decline of pressure and production with time. In another case, we inject CO2 into the reservoir as an enhanced gas recovery mechanism. In both cases, we use fully tensor permeability and unstructured tetrahedral grids using mimetic finite difference (MFD) method. The results of the simulation show that the gas and condensate production rates drop after a certain production plateau, specifically the drop in the condensate rate by up to 46%. The introduction of a CO2 injector yields a positive impact on the productivity and pressure decline of the well, delaying the plateau by up to 1.5 years. It also improves the productivity index by above 35% on both the gas and condensate performance, thus reducing production rate loss on both gas and condensate by over 8% and the pressure, while in terms of pressure and drawdown, an improvement of 2.9 to 19.6% is observed per year.
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Zhang, N., and A. S. Abushaikha. "Mimetic Finite Difference Simulation of Multiphase Flow in Carbonate Fractured Media in Presence of Capillary Pressure." In Third EAGE WIPIC Workshop: Reservoir Management in Carbonates. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201903121.
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Utturkar, Aditya, and Abhijit Mukherjee. "An Experimental Investigation of Air Water Flow Through Different Flow Field Designs of a PEMFC Bipolar Plate in the Presence of Micronized Wax." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54262.
Abstract:
Water, a byproduct of the chemical reaction in a Proton Exchange Membrane Fuel Cell (PEMFC), is removed by the air flowing over the cathode. However, when water production rate is more than its rate of removal, water may flood the fuel cell cathode, cutting off the air supply and stopping the reaction. A bio-mimetic solution to the water management problem was proposed in an earlier work where micronized wax was introduced along with the air that would help encapsulate the water droplets facilitating their quick removal from the fuel cell. Based on earlier results, further investigation is done to study different bi-polar flow field designs for effective water management, using bio-mimetic micronized wax. The different flow field designs studied in this work consists of parallel and single serpentine channels on graphite plates under simulated fuel cell load conditions. The effect of micronized wax on the two-phase flow regimes at different flow field orientations is also analyzed. It is clearly observed that the presence of micronized wax significantly helps in water movement in all air flow channels designs and orientations. It is hypothesized that introduction of micronized wax along with the air flow will allow the use of parallel flow field bi-polar plate designs in operating fuel cells with significantly reduced air side pressure drop instead of the prevalent single serpentine channel flow field designs.
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Hu, Qiuhao, Ye Li, and Fangyi Wei. "Preliminary Results of Numerical Simulations of a Bio-Mimetic Wells Turbine." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54463.
Abstract:
Wells turbine is a kind of self-rectified air turbines used in an oscillatory water column (OWC) device for wave energy conversion. In this study, a steady three-dimensional simulation of a fan-shaped Wells turbine is performed on Star CCM+ commercial software by solving the Reynolds-averaged Navier-Stokes (RANS) equations. The turbulence effects are taken into account by using the Spalart-Allmaras turbulence model. Good agreement between the numerical results and the experimental results within the operation region (5< α <11 degrees) is observed. The geometry of the turbine rotor has a significant effect on the performance of energy conversion. Inspired by the aerodynamics of low Reynolds flyer, the normal fan-shaped Wells turbine is optimized by a bio-mimetic method in which the profile of a hawk moth wing of Manduca Sexta is applied on the blades. The modified turbine has a lower torque and pressure drop coefficient with higher efficiency. The maximum efficiency for the modified turbine is 0.61, compared to 0.48 for the normal fan-shaped one. By analysis of the detailed flow-field, it has also been found that only the middle parts of the blade can effectively generate the momentum. In order to acquire a higher efficiency, further optimization is carried out by refining some blade parts in the tip and the hub which cannot effectively produce power.
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Dong, Rencheng, Faruk O. Alpak, and Mary F. Wheeler. "Accurate Multi-Phase Flow Simulation in Faulted Reservoirs Using Mimetic Finite Difference Methods on Polyhedral Cells." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206298-ms.
Abstract:
Abstract Faulted reservoirs are commonly modeled by corner-point grids. Since the two-point flux approximation (TPFA) method is not consistent on non-orthogonal grids, multi-phase flow simulation using TPFA on corner-point grids may have significant discretization errors if grids are not K-orthogonal. To improve the simulation accuracy, we developed a novel method where the faults are modeled by polyhedral cells, and mimetic finite difference (MFD) methods are used to solve flow equations. We use a cut-cell approach to build the mesh for faulted reservoirs. A regular orthogonal grid is first constructed,and then fault planes are added by dividing cells at fault planes. Most cells remain orthogonal while irregular non-orthogonal polyhedral cells can be formed with multiple cell divisions. We investigated three spatial discretization methods for solving the pressure equation on general polyhedral grids, including the TPFA, MFD and TPFA-MFD hybrid methods. In the TPFA-MFD hybrid method, the MFD method is only applied to part of the domain while the TPFA method is applied to rest of the domain. We compared flux accuracy between TPFA and MFD methods by solving a single-phase flow problem. The reference solution is obtained on a rectangular grid while the same problem is solved by TPFA and MFD methods on a grid with distorted cells near a fault. Fluxes computed using TPFA exhibit larger errors in the vicinity of the fault while fluxes computed using MFD are still as accurate as the reference solution. We also compared saturation accuracy of two-phase (oil and water) flow in faulted reservoirs when the pressure equation is solved by different discretization methods. Compared with the reference saturation solution, saturation exhibits non-physical errors near the fault when pressure equation is solved by the TPFA method. Since the MFD method yields accurate fluxes over general polyhedral grids, the resulting saturation solutions match the reference saturation solutions with an enhanced accuracy when the pressure equation is solved by the MFD method. Based on the results of our simulation studies, the accuracy of the TPFA-MFD hybrid method is very close to the accuracy of the MFD method while the TPFA-MFD hybrid method is computationally cheaper than the MFD method.