Academic literature on the topic 'Bank Employees' Strike'
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Journal articles on the topic "Bank Employees' Strike"
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Ganesh, Sarlaksha, and Mangadu Paramasivam Ganesh. "Effects of masculinity-femininity on quality of work life." Gender in Management: An International Journal 29, no. 4 (May 27, 2014): 229–53. http://dx.doi.org/10.1108/gm-07-2013-0085.
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Purpose – The purpose of this paper was to attempt to understand the effects of gender, masculinity-femininity and social support from three sources (supervisor, co-worker and family) on the quality of work life (QWL) of an employee. In addition, the paper tried to explore the moderating effects of gender and social support in the relationship between masculinity-femininity and QWL. Relevant background variables such as age, marital status, parental status and sector have been included as control variables in the study. Design/methodology/approach – Data were collected from a sample of 307 bank employees in India (208 males and 99 females) working in private and public sector banks using the purposive sampling technique. Prior permission was obtained from the relevant authorities. To test the hypotheses, t-tests and hierarchical regression analyses were performed. In addition, the Baron and Kenny (1986) approach was used to test the moderating effects of gender and social support in the relationship between masculinity-femininity and QWL. Findings – Masculinity-femininity was not found to be significant predictor of QWL, while gender emerged as a significant predictor of QWL. Also, gender moderated the relationship between masculinity-femininity and QWL. All three sources of social support significantly predicted QWL. Results of t-test showed that female employees experienced better QWL than male employees. Furthermore, supervisory category employees and parent employees reported significantly better QWL than non-supervisory and non-parent employees. Practical implications – The key implication for organisations is that employees with both masculine and feminine tendencies are required to strike a balance between goal orientation and people orientation within the company. Also, employees should understand that their gender as well as their individual orientations towards masculinity or femininity will affect the dynamics of any interaction. Hence, being aware of the tendencies that are typical of their gender role orientations both while dealing with themselves as well as while dealing with customers, colleagues or supervisors would help in improving the quality of their work, as well as their QWL, especially in customer service professions. Originality/value – This is one of the few studies that have tried to answer the “why” part of gender differences in QWL. In addition, this study contributes to an understanding of the relative importance of different sources of social support in improving an employee's QWL. Finally, this is the first study to understand the relationship between masculinity-femininity, social support, gender and QWL in the Indian context, where the overall cultural orientation towards gender roles is currently changing.
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Philpot, Denise R., and Mariya Gavrilova Aguilar. "Post-Leave (Return to Work) Training Needs and Human Resource Development." Advances in Developing Human Resources 23, no. 2 (March 5, 2021): 171–84. http://dx.doi.org/10.1177/1523422320982935.
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The Problem Employee leave is impacted by a variety of laws that address employer obligations and employee responsibilities. While the employee leave process is managed by an organization’s Human Resource Management (HRM) function, in most cases these laws and internal organizational policies and procedures do not address the training needs related to the employee’s return to work and subsequent integration into the workplace. Training, and Development is a component of Human Resource Development (HRD) and thus HRD should be largely involved in the employee’s transition back to work. In addition, supervisors/managers should examine their role in to evaluating the training needs of the employee and facilitating a successful post-leave return to work. The HRD literature can benefit from an integrated model of. The Solution This article reviews an important workplace phenomenon existing at the intersection of Human Resource Management (HRM) policies related to employee leave and HRD practices related to addressing training needs upon return to work and emphasizing employee orientation and integration back into the workforce. As a major component of HRD, Organization Development (OD) can also be employed to create a supportive organizational culture for employees on leave. We synthesize existing research on post-leave and rely on the HRD literature to propose solutions that highlight employee training and development interventions. Recommendations for practitioners include how to improve the workplace environment for employees prior to their leave as well as upon return, how to enhance the existence of orientation programs, and how to properly train managers to work well with employees and assess their training needs upon return from leave. The Stakeholders HRD practitioners that are looking to improve leave policies and documented practices as they pertain to the performance and training needs of leave-taking employees upon returning to work as well as managers that strive to ensure returning employees have the knowledge and skills necessary to regain previous levels of competence and productivity will be interested in this research.
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Briggs, Chris. "Lockout Law in Australia." Journal of Industrial Relations 49, no. 2 (April 2007): 167–85. http://dx.doi.org/10.1177/00221856070490020301.
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Should Australian lockout law be reformed? Lockouts in Australia are legally the formal equal of strikes and the legal treatment of lockouts is the most `de-regulated' in the OECD. The notion that strikes and lockouts should be treated equally is intuitively appealing. However, other OECD nations have rejected an equal right to strike and lockout, reserving lockouts for exceptional circumstances where employers suffer from an imbalance of bargaining power so as to reconcile lockouts with other legal principles such as freedom of association and the right to strike. Australian employers, it will be argued, have been given too much freedom by policy makers at federal level to use lockouts that should legally be reserved as a weapon of genuine `last resort'. However, instead of repositioning Australian lockout law back towards the international mainstream, WorkChoices will produce a legal framework that, uniquely, positively discriminates in favour of employer lockouts against strikes.
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Mkandawire, Nathan Chizotera, Thomas Anyanje Senaji, and Eunice Karegi Kirimi. "Exploration Of Staff Incentives And Strategy Implementation In Commercial Banks In Kenya." Advances in Social Sciences Research Journal 7, no. 9 (October 7, 2020): 752–65. http://dx.doi.org/10.14738/assrj.79.9169.
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Though elegant strategies are formulated by organisations, their successful implementation continues to be elusive. Empirical literature suggests that failure of strategy at implementation state is due to factors such as management competence, leadership and resources. However, little attention has been directed to the relationship between incentives, specifically staff incentives such as pay, oversight, meaningfulness of work, employee growth as well as job security and strategy implementation. In this this exploratory study, we examined the perception of staff incentives and their relationship with implementation of financial inclusion strategy in commercial banks in Kenya using a quantitative survey of 42 respondents drawn from commercial banks in Kenya. Financial inclusion strategies are defined as roadmaps of agreed actions at the national or regional level, which stakeholders chart and pursue to accomplish financial inclusion objectives. The study’s target population was operational managers selected from each bank randomly. We found that staff incentives provided to bank employees ranged from being unsatisfactory to moderately satisfactory and that financial inclusion strategy implementation was also moderately successful in the banks. It was also found that oversight and job security had a linear relationship with financial inclusion strategy implementation (oversight: r = 0.336, p = 0.029; job security: r = 0.685, p < 0.001). Further, the pay negatively affected the probability for successful implementation of financial inclusion strategy – it reduces the likelihood by 50% (exp (B) = 0.53) while job security increased the chances for successful implementation of financial inclusion strategy by a factor of 2 (exp (B) =1.883). In conclusion, based on these preliminary findings banks should consider and improve their pay because it was found to negatively affect the likelihood of successful implementation of financial inclusion strategy. Secondly, since job security was found to increase the probability of successful implementation of financial inclusion strategy management of banks should strive to ensure job security to enable them implement the financial inclusion strategy hence improve the financial performance of the banks. Consequently, the managers should improve on the incentives that were rated as unsatisfactory or low by the employees
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Choudhary, Sadaf. "Do Employees Snooze or Strike Back to Injustice?" Journal of Management and Research 7, no. 2 (December 30, 2020): 42–74. http://dx.doi.org/10.29145/jmr/72/070202.
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This study aims to investigate the relationship between the perceptions of injustice and revengeful intentions among first- person (revengeful intention by the victim), second-person (revengeful intention for the sake of a close friend), and third- person (revengeful intention for the sake of an acquaintance). A questionnaire survey was used to collect data from 154 respondents. The findings showed that interactional injustice is associated positively with first-person revenge, whereas distributive and procedural injustice lead to second-person and third-person revengeful intentions. This study offers important insights about the broader impact of injustice which goes beyond the victim and explains how it ignites negative feelings among the non-victim as well.
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Budirianti, Baiq Lisma Rossalia, Agusdin Agusdin, and Surati Surati. "The Influence of Work Discipline, Motivation, Job Satisfaction and the Work Environment on the Performance of Contract Employees." International Journal of Multicultural and Multireligious Understanding 7, no. 11 (December 2, 2020): 174. http://dx.doi.org/10.18415/ijmmu.v7i11.2174.
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Every company always wants to have quality human resources to support the company's success in achieving its goals. Employees as human resources are an important asset for an organization, institution or company. Therefore, it must be managed effectively and efficiently. The achievement of company goals or the success of the company is greatly influenced by the individual performance of its employees. Thus, every organization must strive to improve employee performance in hopes of achieving company goals. This study aims to analyze the effect of work discipline, motivation, job satisfaction and work environment on the performance of contract employees at Bank Rakyat Indonesia Mataram Branch Office. This study used four analysis tools for validity and reliability, tested classical assumptions, multiple linear regression analysis, Model Test (F test) and Hypothesis Test (t test) using the SPSS application. The results of the study using the t test variables of work discipline, motivation, job satisfaction and work environment showed a significant value smaller than 0.05, this means that the variables of work discipline, motivation, job satisfaction and work environment have an effect on employee performance.
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Stich, Jean-François, Monideepa Tarafdar, and Cary L. Cooper. "Electronic communication in the workplace: boon or bane?" Journal of Organizational Effectiveness: People and Performance 5, no. 1 (March 12, 2018): 98–106. http://dx.doi.org/10.1108/joepp-05-2017-0046.
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Purpose The purpose of this paper is to review technostress-related challenges arising out of workplace communication, for employees and organizations, and to provide suggestions for taking these challenges on. Design/methodology/approach The paper presents an overview of current research and practice in the area of technostress-related challenges workplace communication. Findings Employees face technostress challenges relating to workplace communication in the form of technology overload, interruptions and work-home interferences. Organizations have to strike a balance between giving employees the technology they want and protecting them from these challenges. Several interventions to strike such balance are reviewed and commented on. Practical implications The paper gives practitioners an accessible overview of current research and practice in the area of technostress from workplace communication such as e-mail. A number of practical interventions are reviewed and commented on, which could help employees tackle such challenges. Originality/value Although this paper reviews state-of-the-art research, it is written in an accessible and practitioner-oriented style, which should be found valuable by readers with limited time but urgency to deal with technostress challenges arising out of workplace communication.
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Tahapary, Yuneth, Marjam Desma Rahadhini, and Suprayitno Suprayitno. "Transformational Leadership, Organizational Culture and Organizational Commitment in Forming Performance in Secretariat Employees DPRD Surakarta." Benefit: Jurnal Manajemen dan Bisnis 3, no. 1 (December 31, 2018): 1. http://dx.doi.org/10.23917/benefit.v3i1.6532.
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Abstract : Human resource management is one of the functions of the organization, and when the function is running well, the organization is expected to strive for employees to provide optimal performance in accordance with the expected. Factors that may affect employee performance are transformational leadership, organizational culture and organizational commitment. Transformational leadership is a state in which employees feel trust, admiration, loyalty, and respect for their leaders. Organizational culture is the norm, belief, attitude and philosophy that embraced someone in achieving organizational goals. Organizational commitment is a psychological state that characterizes the relationship of employees with the organization and that affects employees will remain in the organization or not. The object of this research is Secretariat Staff of DPRD Surakarta. Based on presurvey in Secretariat DPRD Surakarta has a phenomenon of human resources problems, namely: the leader can not be a good example for employees, there are leaders who often come late, not obey the rules set. Employees have difficulty completing tasks on time, so the job becomes ineffective. Employees are also less confident about the organization, because of the lack of rewards for employees who have good performance.Abstraksi : Manajemen sumber daya manusia adalah salah satu fungsi organisasi, dan ketika fungsinya berjalan dengan baik, organisasi diharapkan berusaha agar karyawan dapat memberikan kinerja yang optimal sesuai dengan yang diharapkan. Faktor-faktor yang dapat mempengaruhi kinerja karyawan adalah kepemimpinan transformasional, budaya organisasi dan komitmen organisasi. Kepemimpinan transformasional adalah keadaan di mana karyawan merasa percaya, mengagumi, kesetiaan, dan menghormati pemimpin mereka. Budaya organisasi adalah norma, keyakinan, sikap dan filosofi yang merangkul seseorang dalam mencapai tujuan organisasi. Komitmen organisasi adalah keadaan psikologis yang mencirikan hubungan karyawan dan organisasi yang mempengaruhi karyawan akan tetap berada di organisasi atau tidak. Objek penelitian ini adalah Staf Sekretariat DPRD Surakarta. Berdasarkan presurvey di Sekretariat DPRD Kota Surakarta, ada sejumlah masalah sumber daya manusia, yaitu: pemimpin yang tidak memiliki contoh yang baik untuk karyawan, ada pemimpin yang sering datang terlambat, tidak mematuhi aturan yang ditetapkan. Karyawan mengalami kesulitan menyelesaikan tugas tepat waktu, sehingga pekerjaan menjadi tidak efektif. Karyawan juga kurang yakin tentang organisasi, karena kurangnya penghargaan untuk karyawan yang memiliki kinerja yang baik.
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Bordia, Prashant, Simon Lloyd D. Restubog, and Robert L. Tang. "When employees strike back: Investigating mediating mechanisms between psychological contract breach and workplace deviance." Journal of Applied Psychology 93, no. 5 (2008): 1104–17. http://dx.doi.org/10.1037/0021-9010.93.5.1104.
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Lee, Sang Bong, and Taewon Suh. "Internal audience strikes back from the outside: emotionally exhausted employees’ negative word-of-mouth as the active brand-oriented deviance." Journal of Product & Brand Management 29, no. 7 (January 27, 2020): 863–76. http://dx.doi.org/10.1108/jpbm-02-2019-2239.
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Purpose Reflecting on the importance of negative word-of-mouth (NWOM) executed by internal audience of brand management, this study aims to explore the mechanism of employees’ NWOM in the emotional exhaustion context. Design/methodology/approach Focusing on employees’ active brand-oriented deviances, this study used a surveyed data set (n = 150) collected from negatively aroused employees experiencing a negative event within their organization. Structural equation modeling was adopted to test the hypotheses. Findings The current study revealed that employees’ NWOM is associated with emotional exhaustion. Also, it discovered that emotional exhaustion is more strongly associated with employees’ NWOM than turnover intention. Research limitations/implications Relying on self-regulation theory, the current study identified emotional exhaustion as a critical antecedent of employees’ NWOM. Future researchers can use the longitudinal research design or temporal separation as an effort to prevent common method variance. Practical implications Internal audiences engage in negative brand-oriented performance by spreading NWOM. Further, the advance in social media may instigate NWOM spread by internal audiences to external audiences. Originality/value This paper tests the explanatory power of conservation of resources theory and self-regulatory theory in terms of the impact of employees’ emotional exhaustion on NWOM and turnover intention.
Books on the topic "Bank Employees' Strike"
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Los trabajadores de cuello duro y la huelga bancaria de 1959. Buenos Aires: Editorial El Colectivo, 2011.
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Leila Maria da Silva Blass. Estamos em greve!: Imagens, gestos e palavras do movimento dos bancários, 1985. São Paulo: Editora Hucitec, 1992.
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Las huelgas bancarias, de Perón a Frondizi, 1945-1962: Contribución a la historia de las clases sociales en la Argentina. Buenos Aires, Argentina: Centro Cultural de la Cooperación Floreal Gorini, 2008.
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Strike Back: Rediscovering Militant Tactics to Confront the Attack on Public Employee Unions. Ig Publishing, Incorporated, 2019.
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Paramos São Paulo, sacou?: A participção dos bancários paulistas na greve que parou o Brasil em 85. [São Paulo]: Sindicato dos Bancários-SP/GEP-URPLAN, 1986.
Find full textBook chapters on the topic "Bank Employees' Strike"
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Stoner, Andrew E. "Strike Up the Band." In The Journalist of Castro Street, 155–66. University of Illinois Press, 2019. http://dx.doi.org/10.5622/illinois/9780252042485.003.0011.
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Shilts begins work on And the Band Played On for St. Martin’s Press – despite an initial struggle to find a publisher for the work. Shilts tackles the complexity of writing about an ongoing infectious disease pandemic with an unknown ending. Shilts unveils his thesis that AIDS succeeded because of government neglect, gay leaders public relations concerns, and news media reluctance to cover gay-related issues. Shilts employs “new journalism” techniques to tell the story of AIDS including reconstructed dialogue and internal thoughts. Shilts learns of the existence of a gay man infected with HIV still sexually active. Shilts uncovers and misinterprets the first “cluster study” on KS victims in southern California. Initial criticism of Shilts for “Patient Zero” concept raised.
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Wood, Gregory. "Workers, Management, and the Right to Smoke during World War II." In Clearing the Air. Cornell University Press, 2016. http://dx.doi.org/10.7591/cornell/9781501704826.003.0004.
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This chapter explains that World War II was a major historical moment when cigarettes became respectable in American culture and soon became permissible in the industrial workplace. Wartime popular culture connected smoking to military service and support for soldiers' sacrifices, making the cigarette an acceptable and respectable symbol of patriotic expression. At the same time, workers pressed employers for the right to smoke on the job, and smoking disputes played a significant role in several strikes in the automobile-turned-defense plants of Michigan. By 1950, many major employers such as General Motors and the Ford Motor Company had rescinded their bans on smoking.
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Bauder, Harald. "Discourse of Foreign Farmworkers." In Labor Movement. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195180879.003.0018.
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In 1995, the Ontario provincial government, under conservative premier Mike Harris, repealed legislation put in place the year before by the former central-left government of Bob Rae that protected Ontario’s agricultural workers under the province’s labor code. Migrant workers were also affected by this legislation. In late April 2001, Mexican workers staged a two-day strike in a Leamington greenhouse, and in May 2001, approximately 100 Mexican offshore farmworkers protested in Leamington against substandard working and living conditions, including the lack of safety protection against pesticides, overcrowded living spaces, long working hours, no overtime pay, insufficient medical care, unfair government paycheck deductions, and threats of deportation to their home countries. After these events, some of the protesters were dismissed from the offshore program and sent back to Mexico. The media reports on these protests varied widely. Reports were either sympathetic to the workers’ concerns, or they condemned the protests as unjustified nagging by a small minority of angry workers. Several of the newspaper reports that were sympathetic to the protesting workers (e.g., Kitchener-Waterloo [Ontario] Record 2001; St. Catharines [Ontario] Standard 2001) presented the same quote from an anonymous migrant worker who criticizes the unfair treatment of foreign migrant workers by Canadian employers: “What I’ve realized here in Canada is that employers don’t hire us as human beings. They think we’re animals. . . . The first threat that they always make is that if you don’t like it, you can go back to Mexico.” In a report about the same protests, the Windsor (Ontario) Star quoted farmworkers who articulated similar concerns: “‘Growers don’t care whether you’re injured or not, they only care when you’re healthy,’” and “[the grower] said, ‘If you don’t work faster, you’ll be sent back to Mexico’” (Welch 2001). Other articles gave the events a different spin. A fact-finding mission after the protests uncovered that only a few migrant workers filed formal complaints against their employers. The lack of complaints was interpreted as assurance that workers were satisfied with their employment circumstances.
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Roll, Jarod. "The American Boy Has Held His Own." In Poor Man's Fortune, 128–64. University of North Carolina Press, 2020. http://dx.doi.org/10.5149/northcarolina/9781469656298.003.0006.
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This chapter examines how Tri-State miners developed a faith that strong, white men could profit from risk-taking wage labor by transforming the job of hand-loading, or shoveling, into high-paying work through extreme physical exertion. They did this by insisting on a share of the profits of mining by working according to a piece rate that tracked the market price of metal. Tri-State miners justified this demand by appealing to their sense of privilege as white American men. This new culture of reckless work drew upon and fueled an aggressive expression of working-class masculinity that further alienated them from the safety and security of union solidarity. But it also set them in opposition to their employers. To back their demand for a share of profits through the piece rate, Tri-State miners appealed to white supremacy and American nationalism and rebelled by strikebreaking, changing jobs, suing for injuries, and by staging their own wildcat strikes without union allies. Their insistence on the piece rate also began to destroy their physical health by exacerbating a local silicosis epidemic.
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Kippen, James. "Mapping a Rhythmic Revolution Through Eighteenth- and Nineteenth-Century Sources on Rhythm and Drumming in North India." In Thought and Play in Musical Rhythm, 253–72. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190841485.003.0011.
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The Indo-Persian and vernacular literatures from the late seventeenth to nineteenth centuries on rhythm and drumming in northern India bridge an enormous gap between archaic Sanskrit sources and the theory and practice of the last 100 years. This chapter sets many of these key texts in historical perspective and explores the trajectory of their descriptions and notations of tāl-metric-rhythmic structures that have always served to organize composition and improvisation. A shift is noted from quantitative to qualitative measurements as writers employed the tools of Arabic prosody and began to articulate new concepts: ṭheka-configurations of strokes by which tāls are identified and maintained in performance; ḵẖālī, the “empty” or “unsounded” beat; and band, patterns transformed by the absence of bass drum sonorities. Such changes are arguably due to the rapid rise of the tabla in the eighteenth and nineteenth centuries, which gradually usurped the roles of other drums.
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Gussow, Adam. "Ralph Ellison, Richard Wright, and the Southern Blues Violences." In Whose Blues?, 180–96. University of North Carolina Press, 2020. http://dx.doi.org/10.5149/northcarolina/9781469660363.003.0009.
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One of the most frequently quoted descriptions of the blues--“an autobiographical chronicle of personal catastrophe expressed lyrically”--was penned by Ralph Ellison in a 1945 review essay of Richard Wright’s autobiography, Black Boy. This chapter uses Ellison’s formulation as an opening through which to explore the way in which three distinct but related modes of southern violence play significant roles in the major works of both authors. Disciplinary violence, including lynching, vagrancy laws, and prison farms, is white-on-black violence that aims to terrorize, immobilize, and punish. Retributive violence is black-on-white violence that resists or strikes back at disciplinary violence. Intimate violence is black-on-black violence driven by jealousy, hatred, and other strong passions. All three forms of violence show up in the blues tradition—and in Black Boy, where they help Wright craft a portrait of a blues-surcharged young Mississippian who, although bereft of the tools and training needed to express those blues musically, will ultimately find in literature, where words can be “weapons,” the outlet he so desperately needs. In Invisible Man and other texts, by contrast, Ellison employs the southern violences in ways that often heighten the comic element within blues’ tragicomic palette of emotions.
Conference papers on the topic "Bank Employees' Strike"
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Smith, Kenneth, and Anthony Fahme. "Back Side-Cooled Combustor Liner for Lean-Premixed Combustion." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-239.
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This paper describes the design and initial testing of a second generation, lean-premixed combustor for a 6100 horsepower industrial gas turbine. The full scale, prototype combustor liner employed augmented backside cooling (ABC) as a means of reducing NOx and CO emissions. A thermal barrier coating (TBC) was applied on the liner hot side to reduce thermal flux from the flame zone. The goal of the effort was to demonstrate that the avoidance of film-cooling for the combustor liner would allow emissions reductions in a lean-premixed combustion system. Testing of the combustor was conducted in both low and high pressure environments. The testing demonstrated that the use of trip-strips for backside cooling provides an effective means of reducing CO emissions. The lower CO levels can be exploited by lowering flame temperatures to achieve lower NOx emissions. Reaction quenching associated with film cooling is indicated as the cause of the higher CO emissions in more conventional liners. Cyclic rig testing showed the TBC to have good short-term durability. Long-term field testing is getting underway.
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Das, Hangsa Raj, Rajesh Dey, and Sumanta Bhattacharya. "DESIGN OF RECTANGULAR SHAPED SLOTTED MICRO STRIP ANTENNA FOR TRIPLE FREQUENCY OPERATION FOR WIRELESS APPLICATION." In Topics in Intelligent Computing and Industry Design. Volkson Press, 2021. http://dx.doi.org/10.26480/etit.02.2020.169.172.
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This Paper represents the designing of the Tri- Band Rectangular Printed micro strip Antenna. One amongst the simplest feeding technique is employed i.e. coaxial feeding technique for feeding the antenna Tri band antenna is obtained by etching two quarter wavelength rectangular shaped slots inside the patch at the proper position to resonate over GSM, Bluetooth and Wi- MAX. The proposed antenna is realized on FR-4 dielectric substrate having a dielectric constant of 4.4 and loss tangent of 0.02, with dimensions of 46x38x1.6mm3. The design calculations are done for the frequency of 2.4 GHz. The designed antenna is simulated using EM simulation software CAD FEKO suite (7.0). The antenna covers the three bands of operation i.e. GSM (1.834-1.858GHz), Bluetooth (2.422- 2.487GHz), Wi-Max (3.519-3.583GHz) with reflection coefficient ≤-10dB. The overall simulation results shows that the antenna gives good impedance matching at desired frequencies with VSWR≤2.Also the radiation pattern, efficiency,gain and impedance for all four frequencies are investigated using simulation results.
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Siano, Daniela, Michela Costa, and Fabio Bozza. "Optimal Design of a Two-Stroke Diesel Engine for Aeronautical Applications Concerning Both Thermofluidynamic and Acoustic Issues." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68713.
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Some aspects concerning the development of a prototype of a diesel engine suitable for aeronautical applications are discussed. The engine aimed at achieving a weight to power ratio equal to one kg/kW (220 kg for 220 kW) is conceived in a two stroke Uniflow configuration and constituted by six cylinders distributed on two parallel banks. Basing on a first choice of some geometrical and operational data, a preliminary fluid-dynamic and acoustic analysis is carried out at the sea level. This includes the engine-turbocharger matching, the estimation of the scavenging process efficiency, and the simulation of the spray and combustion process, arising from a Common Rail injection system. Both 1D and 3D CFD models are employed. In-cylinder pressure cycles are utilized to numerically predict the combustion noise. The acoustic study is based on the integration of FEM/BEM codes. In order to improve the engine performance and vibro-acoustic behaviour, the 1D model, tuned with information derived from the 3D code, is linked to an external optimiziation code (ModeFRONTIER™). A constrained multi-objective optimization is performed to contemporary minimize the fuel consumption and the maximum in-cylinder temperature and pressure gradient. In this way a better selection of a number of engine parameters is carried out (exhaust valve opening, closing and lift, intake ports heights, start of injection, etc). The best found solution is finally compared to the initial one and some substantial design improvements are discussed.
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Zhou, Rongliang, Zhikui Wang, Cullen E. Bash, and Alan McReynolds. "Modeling and Control for Cooling Management of Data Centers With Hot Aisle Containment." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62506.
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In traditional raised-floor data center design with hot aisle and cold aisle separation, the cooling efficiency suffers from recirculation resulting from the mixing of cool air from the Computer Room Air Conditioning (CRAC) units and the hot exhaust air exiting from the back of the server racks. To minimize recirculation and hence increase cooling efficiency, hot aisle containment has been employed in an increasing number of data centers. Based on the underlying heat transfer principles, we present in this paper a dynamic model for cooling management in both open and contained environment, and propose decentralized model predictive controllers (MPC) for control of the CRAC units. One approach to partition a data center into overlapping CRAC zones of influence is discussed. Within each zone, the CRAC unit blower speed and supply air temperature are adjusted by a MPC controller to regulate the rack inlet temperatures, while minimizing the cooling power consumption. The proposed decentralized cooling control approach is validated in a production data center with hot aisles contained by plastic strips. Experimental results demonstrate both its stability and ability to reject various disturbances.
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Raza, Mustansar, Hossam Elmoneim, Kris Looten, Omar Elzanaty, Ahmed Shakeel, Kamil Shehzad, Mustafa Sarbast, and Serwer Yousif. "Making Workovers Easy and Cost Effective: Turning Old Ways into New Opportunities." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206086-ms.
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Abstract A case study and methodology is presented to shed the light on the different processes followed during the placement of a non-damaging isolation barrier in a group of highly naturally-fractured and vugular gas wells. The temporary isolation aims at isolating the wellbore from the troublesome formation and allow the removal of the original completion string and install a new redesigned one. The process helped putting the wells back on production with-out the need to stimulate any of them. This helped client to reduce the overall workover cost by 40% and proved to be successful and efficient to complete the required operation in a time-efficient. The operator had 4 wells with OH sections ranging from 40-80m which were completed in the late 1990's with no production packer. To preserve wellbore integrity the completion string needed to be pulled and replaced by a string with production packer and DH gauges. Visco-Elastic Surfactant (VES) and calcium CaCO3 (carbonate) used ubiquitously in field operations were tested for optimal design to fill highly fractured OH without damaging formation. Caliper logs were not available, and the presence of natural fractures posed a challenge to calculate the actual OH volume. A system was developed to carry the CaCO3 into the wellbore in stages and slickline was employed to measure fill after each stage. Once the OH was filled with CaCO3 and well would support a fluid column coil tubing was used to place an acid-soluble cement plug in the short interval between casing shoe and end of tubing (6-9m). The paper describes the optimization process followed to tune the CaCO3 pads composition, gel composition, mixing and placement technique. The first well in the campaign required more than 10 times the theoretical volume of CaCO3 to fill the open hole with multiple settling issues at surface. It was concluded the surfactant gel was likely carrying the CaCO3 into the fractures. The procedure was modified to tie in a line of breaker solution to the well head allowing sufficient viscosity of the fluid to carry the CaCO3 from surface but immediately lose viscosity and allow the CaCO3 to settle in the open hole without being carried into the formation. Specific coil tubing procedures were employed to allow the setting of ultra-short acid soluble cement plugs (<6m). All wells were successfully isolated to allow the safe workover of the completion string and returned to production with no loss of gas flow, with-out the need to stimulate after the work over. The campaign exhibited a new method of employing existing technologies to achieve the objective in a highly challenging and relatively new oilfield of Kurdistan. The campaign also demonstrated the benefit, in terms of saving time and cost because of extensive pre-execution planning.
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Behjat, Amir, Manaswin Oddiraju, Mohammad Ali Attarzadeh, Mostafa Nouh, and Souma Chowdhury. "Metamodel Based Forward and Inverse Design for Passive Vibration Suppression." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22747.
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Abstract Aperiodic metamaterials represent a class of structural systems that are composed of different building blocks (cells), instead of a self-repeating chain of the same unit cells. Optimizing aperiodic cellular structural systems thus presents high-dimensional design problems, that become intractable to solve using purely high-fidelity structural analysis coupled with optimization. Specialized analytical modeling along with metamodel based optimization can provide a more tractable alternative to designing such aperiodic metamaterials. To explore this concept, this paper presents an initial design automation framework applied to a case study representative of a simple 1D metamaterial system. The case under consideration is a drill string, where vibration suppression is of utmost importance. The drill string comprises a set of nonuniform rings attached to the outer surface of a longitudinal rod. As such, the resultant system can now be perceived as an aperiodic 1D metamaterial with each ring/gap representing a cell. Despite being a 1D system, the simultaneous consideration of multiple degrees of freedom (associated with torsional, axial, and lateral motions) poses significant computational challenges. To deal with these challenges, a transfer matrix method (TMM) is employed to analytically determine the frequency response of the drill string. However, due to the minute scale cost of the TMM method, the optimization remains computationally burdensome. This latter challenge is addressed by training a suite of neural networks on a set of TMM samples, with each network providing the response w.r.t. a specific frequency. Optimization is then performed to minimize mass subject to constraints on the gap between consecutive resonance peaks in one case, and minimizing this gap in the second case. Crucial improvements are accomplished over the initial baselines in both cases. Further novel contributions occur through the development of an inverse modeling approach that can learn optimal inverse designs with minimum mass and a desirable non-resonant frequency range, which partially mimics band gap behavior in perfectly periodic dispersive structures. To this end, we introduce the use of an emerging modeling formalism called in-vertible neural nets. Our study indicates that the inverse model is able to generate constraint satisfying designs with slightly higher mass.
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Zheng, Qian, Xiaoben Liu, Hong Zhang, and Samer Adeeb. "Reliability-Based Assessment Method of Buried Pipeline at Fault Crossings." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9609.
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Abstract The tectonic fault, which is one of the most common geohazards in field, poses great threat to buried pipe segments. Pipes will process to buckling or fracture due to large strain induced by continuously increasing ground displacements during earthquakes. Therefore, it is imperative to conduct safety analysis on pipes which are buried in seismic areas for the sake of ensuring normal operation. However, the highly nonlinearity of pipe response restricts the proceeding of reliability assessment. In this study, a hybrid procedure combining finite element method and artificial neural network is proposed for reliability-based assessment. First of all, the finite element model is developed on ABAQUS platform to simulate pipe response to strike-slip fault displacements. Thus, the strain demand value (the peak strain value obtained by finite element model in each design case) can be collected for database establishment, which is the preparation for neural network training. Thoroughness of the strain demand database can be achieved by a fully comprehensive calculation with consideration of influencing factors involving pipe diameter and wall thickness, operating pressure, magnitude of fault displacement, intersection angle between pipeline and fault plane, and characteristic value of backfill mechanics. Sequentially, Back Propagation Neural Network (BPNN) with double hidden layers is trained based on the developed database, and the surrogate strain demand prediction model can be obtained after accuracy verification. Hence, the strain-based limit state function can be respectively determined for tensile and compressive conditions. The strain capacity term is simply assumed based on published papers, the strain demand term is naturally superseded by the surrogate BPNN model, and Monte Carlo Simulation is employed to compute the probability of failure (POF). At last, the workability of the proposed approach is tested by a case study in which basic variables are referred to the Second West-to-East natural gas transmission pipeline project. It indicates that ANN is a good solver for reliability problems with implicit limit state functions especially for highly nonlinear problems. The proposed method is capable of computing POFs, which is an exploratory application for reliability research on pipes withstanding fault displacement loads.
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Mohammad, Bassam, San-Mou Jeng, and M. Gurhan Andac. "Influence of the Primary Jets and Fuel Injection on the Aerodynamics of a Prototype Annular Gas Turbine Combustor Sector." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23083.
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Transverse dilution jets are widely used in combustion systems. The current research provides a detailed study of the primary jets of a realistic annular combustion chamber sector. The combustor sector comprises an aerodynamic diffuser, inlet cowl, combustion dome, primary dilution jets, secondary dilution jets and cooling strips to provide convective cooling to the liner. The chamber contracts toward the end to fit the turbine nozzle ring. 2D PIV is employed at an atmospheric pressure drop of 4% (isothermal) to delineate the flow field characteristics. The laser is introduced to the sector through the exit flange. The interaction between the primary jets and the swirling flow as well as the sensitivity of the primary jets to perturbations is discussed. The perturbation study includes: effect of partially blocking the jets, one at a time, the effect of blocking the convective cooling holes, placed underneath the primary jets and shooting perpendicular to it. In addition, the effect of reducing the size of the primary jets as well as off-centering the primary jets is explained. Moreover, PIV is employed to study the flow field with and without fuel injection at four different fuel flow rates. The results show that the flow field is very sensitive to perturbations. The cooling air interacts with the primary jet and influences the flow field although the momentum ratio has a 100:1 order of magnitude. The results also show that the big primary jets dictate the flow field in the primary zone as well as the secondary zone. However, relatively smaller jets mainly influence the primary combustion zone because most of the jet is recirculated back to the CRZ. Also, the jet penetration is reduced with 25% and 11.5% corresponding to a 77% and 62% reduction of the jet’s area respectively. The study indicates the presence of a critical jet diameter beyond which the dilution jets have minimum impact on the secondary region. The jet off-centering shows significant effect on the flow field though it is in the order of 0.4 mm. The fuel injection is also shown to influence the flow field as well as the primary jets angle. High fuel flow rate is shown to have very strong impact on the flow field and thus results in a strong distortion of both the primary and secondary zones. The results provide useful methods to be used in the flow field structure control. Most of the effects shown are attributed to the difference in jet opposition. Hence, the results are applicable to reacting flow.