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Статті в журналах з теми "The Acquirer’s Multiple":
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Annosi, Maria Carmela, Elena Casprini, Antonella Martini, and Jessica Geovana Ramón Torres. "Post-acquisition knowledge management practices for exploration and exploitation: insights from a food service organization." Journal of Knowledge Management 25, no. 11 (June 3, 2021): 129–48. http://dx.doi.org/10.1108/jkm-10-2020-0784.
Анотація:
Purpose Drawing from the knowledge-based view of the firm, this paper aims to explore the knowledge management practices that the acquirer uses to exploit its knowledge creating conditions for the exploitation of the target’s knowledge and to explore its knowledge by realizing routines for the integration of new knowledge within the target. Design/methodology/approach This paper presents an in-depth case study analysis based on the acquisition of a Dutch food service organization by an Italian company operating in the same sector. Findings The case study analysis reveals four mechanisms for knowledge integration, two aimed at exploiting the acquirer’s knowledge, and two aimed at exploring the acquirer’s knowledge. Originality/value This paper unveils that it is the interlinkage among organizational, human and technological factors, at multiple layers of the target, which allows the knowledge integration within the post-acquisition process.
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Sareewiwatthana, Paiboon, and Patarapon Janin. "Tests of quantitative investing strategies of famous investors: case of Thailand." Investment Management and Financial Innovations 14, no. 3 (November 9, 2017): 218–26. http://dx.doi.org/10.21511/imfi.14(3-1).2017.06.
Анотація:
This research studied quantitative investing strategies of famous investors in the Stock Exchange of Thailand from 2002 to 2016. This study found that the Graham’s net nets, Dreman’s contrarian, Fisher’s super stock, O’Neil’s CANSLIM, Slater’s zulu principle, Neff’s Cheapo, O’Shaughnessy’s tiny titans, Greenblatt’s magic formula, Carlisle’s acquirer’s multiple and Piotroski’s F-score strategies beat the market (SET TRI). It also found that the Benjamin Graham’s net nets strategy which used the market capitalization of less than two thirds of net current assets value (NCAV) criterion produced the highest return among the strategies used. However, the Tobias Carlisle’s Acquirer’s multiple strategy which used EBIT to enterprise value (EBIT/EV) to sort stocks for 30 stocks yielded the highest risk-adjusted return.
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Ai, Qi, and Hui Tan. "Acquirers’ prior related knowledge and post-acquisition integration." Journal of Organizational Change Management 30, no. 4 (July 3, 2017): 647–62. http://dx.doi.org/10.1108/jocm-08-2015-0145.
Анотація:
Purpose This paper examines the role of acquirers’ prior related knowledge in the post-acquisition integration process. The purpose of this paper is to identify what constitutes the key prior related knowledge that can contribute to the reverse knowledge transfer following Chinese firms’ outward mergers and acquisitions (M&As) to Europe, and explain how prior related knowledge affects such transfer of knowledge. Design/methodology/approach The authors employ a multiple case study approach. Semi-structured interviews were conducted from February 2012 to June 2013 with 24 managers. Findings The authors find that, in addition to knowledge about the target, prior international business experience, R&D capability, and industrial capabilities are key components of acquirers’ prior related knowledge that can contribute to the success of M&A integration and post-acquisition reverse knowledge transfer. Indeed, Chinese acquirers’ prior related knowledge can influence the reverse knowledge transfer from acquired firms to acquirers by directly improving acquirers’ absorptive capacity and building a harmonious organisational climate to facilitate such transfer. Originality/value This paper contributes to the absorptive capacity and the cross-border M&A literature. It extends the current knowledge on the key components of an acquirer’s prior related knowledge in the outward M&A by Chinese firms. It also uncovers how post-acquisition reverse knowledge transfer is affected by acquirers’ prior related knowledge.
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Pathak, Atul Arun. "Tata Motors’ successful cross-border acquisition of Jaguar Land Rover: key take-aways." Strategic Direction 32, no. 9 (September 12, 2016): 15–18. http://dx.doi.org/10.1108/sd-05-2016-0083.
Анотація:
Purpose This paper aims to focus on Tata Motors, an automobile company from an emerging market, and its successful acquisition of two global marquee car brands in Jaguar and Land Rover (JLR). It traces the evolution of JLR under the stewardship of Tata Motors over an eight-year long period and examines the strategic reasons for the success of the acquisition. Design/methodology/approach The paper approaches strategic issues in cross-border acquisitions using an illustration of a successful deal. It is based on statements of leaders and secondary data about the acquirer and acquired organizations. The paper explores the strategic challenges faced when emerging market firms carry out cross border acquisition deals. It recommends the short-term and long-term strategies that acquirers can follow to improve the chances of a successful acquisition. Findings Any acquisition is challenging. Cross-border acquisitions face greater challenges, especially if the acquirer is from an emerging market country while the target company is from a developed country. Success of the acquisition, especially over the long run, depends on both internal factors that are under the control of the acquirer’s management, as well as external environmental factors that it needs to address. Both patience and luck are required ingredients for success in such contexts. Practical implications While the general temptation in any acquisition is to extract synergies as quickly as possible, the Tata Motors’ acquisition of JLR is an exception. Tata Motors carefully handled short-term challenges and continued to invest in the core competencies of JLR and reaped benefits over the long run. It was also fortunate that a variety of factors in the external environment turned favorable for Tata Motors and JLR in the eight years since the deal took place. Social implications It concedes that during an M&A deal, the leaders of a seller organization may be nervous about their future. JLR trade union leaders were initially not sure whether jobs in UK would remain secure. To ensure success of the deal, the leaders of the acquirer firm need to balance the interests of multiple stakeholders, both in the short-term, as well as over a longer-term perspective. Originality/value The paper considers the Tata Motors’ acquisition of JLR. It is an example of a large, difficult cross-border acquisition by an emerging market based company. While the acquisition proved difficult in the short term, it has yielded excellent dividends to the parent company over the long term. This paper explores the reasons why this cross-border acquisition succeeded and recommends strategies that other companies considering cross-border acquisitions can consider to improve their chances of success.
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Giannopoulos, George, Ehsan Khansalar, and Patel Neel. "The Impact of Single and Multiple Mergers and Acquisitions on Shareholders’ Wealth of UK Bidder Firms." International Journal of Economics and Finance 9, no. 3 (February 20, 2017): 141. http://dx.doi.org/10.5539/ijef.v9n3p141.
Анотація:
This study investigates the impact of takeover announcements on UK acquirer shareholders’ wealth during the period 2002-2006. More specifically, it is investigated whether the impact of single acquirers on shareholders’ wealth is significantly different from the impact of multiple acquirers. Findings suggest that acquirer shareholders experience positive abnormal returns during the announcement period. Moreover, the results indicate single acquirers consistently outperform multiple acquirers when testing for deal characteristics such as: payment method (cash or equity), target status (public or private), target location (domestic or cross-border) and industry relatedness (specification or diversification). Performance declines with sequential acquisitions due to merger programme announcement hypothesis. Successful first time acquirers suffer from hubris whilst unsuccessful first time acquirers learn from their experiences suggested by the organisation learning hypothesis but go on to suffer from hubris. Acquisitions of private firms yield significant abnormal returns whereas public acquisitions reduce the value of UK acquirers. The effect of cash and equity, domestic and foreign, related and unrelated takeovers are inconclusive for the short-term windows investigated by this study.
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Öberg, Christina. "Transferring acquisition knowledge – sources, directions and outcomes." Management Research: Journal of the Iberoamerican Academy of Management 15, no. 1 (April 10, 2017): 28–46. http://dx.doi.org/10.1108/mrjiam-02-2016-0644.
Анотація:
Purpose The literature has described knowledge transfer in terms of how companies advance their merger and acquisition activities through experience. This indicates a knowledge transfer from one acquisition to the next, with the acquiring party being the carrier of such knowledge. The present paper aims to add to this view through pointing out how knowledge on how to acquire and how to integrate, follows also from other parties and their experiences. The paper discusses and classifies sources, directions and outcomes of knowledge transfer on acquisitions from a stakeholder point of view. Focus is on external stakeholders and knowledge is divided between knowledge on acquiring and knowledge on integrating, thus dealing with the pre- and post-merger stages of acquisitions. Design/methodology/approach The paper adopts a multiple case study research design to illustrate its point. While the individual acquisitions are interconnected through the acquirer or acquired party being the same company, indications are that knowledge on how, when and what party to acquire and how to integrate (degree, direction, timing and function) follows from external stakeholders and their previous experiences. Findings The findings suggest that knowledge on acquiring follows from general knowledge on sector levels, while specific parties – including customers, competitors and the acquired party – are the sources of knowledge on integration. Knowledge on acquiring is imitative, while knowledge on integrating rests more on the external stakeholders’ failures. Originality/value The paper provides a research design contribution to acquisition studies, as most such studies adopt a quantitative, secondary data approach. The main contribution is though the focus on external stakeholders as sources of knowledge on acquiring and integrating. The previous literature seems to suggest that it is the experience accumulated through the acquirer’s previous acquisitions that provides the acquisition knowledge. The paper’s perspective, which includes several external stakeholders, provides a rather unique piece of research on stakeholders in mergers and acquisitions.
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Brueller, Nir N., and Laurence Capron. "Acquisitions of Startups by Incumbents: The 3 Cs of Co-Specialization from Startup Inception to Post-Merger Integration." California Management Review 63, no. 3 (March 7, 2021): 70–93. http://dx.doi.org/10.1177/0008125621996502.
Анотація:
Facing constant pressures to grow, established firms increasingly harness external innovation by collaborating with and eventually acquiring startups. To succeed in their exit through acquisition, startup firms and incumbents have to master three steps (the “3 Cs”) that enhance the co-specialization with the acquirer: establishing the Complementarity of offerings, generating Customer endorsement, and attracting an acquirer executive Champion. Drawing on a multiple-case, inductive study of seven Israeli startup acquisitions completed by two acquirers from the information and communications technology (ICT) industry, this article illustrates the different approaches pursued by the startup firms and their acquirers to succeed in managing pre- and post-acquisition processes.
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Amiri, Sina, David King, and Samuel DeMarie. "Divestiture of prior acquisitions: competing explanations of performance." Journal of Strategy and Management 13, no. 1 (November 21, 2019): 33–50. http://dx.doi.org/10.1108/jsma-05-2019-0076.
Анотація:
Purpose There are multiple perspectives of divestiture and its performance that require reconciliation. While research finds a positive market response to divestment announcement, divestiture of prior acquisitions are generally viewed negatively. The purpose of this paper is to develop and empirically test different explanations for the divestment of prior acquisitions. Design/methodology/approach This research employs event study to capture market reaction at acquisition announcement and subsequent divestments in a sample of 69 public US high-technology acquisitions between 2003 and 2008 that were divested by 2015. Only initial acquisitions involving public firms were included from the Thomson One Banker SDC database. Public press releases and companies’ SEC filings were reviewed to track divestitures back to prior acquisitions. Ordinary least squared regression was used to estimate coefficients. Findings Results indicate a positive relation between acquisition and divestiture performance around announcement dates. This finding rejects the correction of mistake explanation, suggesting that a negative stigma surrounding divestments is largely unwarranted and that investors reward capable acquirer’s divestiture decisions. Practical implications Investors do not treat all information signals at divestiture equally. For example, acquisitions made by larger and more profitable firms, or acquisitions paid for with stock, are associated with lower return upon divestiture announcement. Originality/value This study finds that investors view divestiture as a proactive strategy, suggesting firms can improve performance by actively managing acquisitions and divestments to optimize their portfolio of businesses.
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Greene, Daniel. "Valuations in Corporate Takeovers and Financial Constraints on Private Targets." Journal of Financial and Quantitative Analysis 52, no. 4 (August 2017): 1343–73. http://dx.doi.org/10.1017/s0022109017000527.
Анотація:
I examine acquisitions of private firms by public acquirers to better understand the effects of financial constraints on the division of economic gains in takeovers. Empirical tests exploit interstate bank branching deregulation, which relaxes financial constraints on private firms and can strengthen their bargaining position in an acquisition. Using a proxy for the degree to which targets depend on acquirers for financing, I find that private targets depend less on acquirers as a result of interstate bank branching deregulation. Relaxing financial constraints on private targets leads to an increase in target valuation multiples and a decrease in acquirer wealth gains.
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Hutzschenreuter, Thomas, Ingo Kleindienst, and Michael Schmitt. "How mindfulness and acquisition experience affect acquisition performance." Management Decision 52, no. 6 (July 8, 2014): 1116–47. http://dx.doi.org/10.1108/md-07-2013-0376.
Анотація:
Purpose – The purpose of this paper is to provide insights to the impact of acquisition experience from prior acquisitions on the performance of subsequent ones. The authors base the analysis on the concept of mindfulness which has recently gained increasing attention in organizational learning theory. The aim is to extend prior research on mindfulness in organizational learning by empirically addressing how mindfulness in knowledge transfer affects task performance in the context of a rare organizational event, i.e. an acquisition, and how it is moderated by the conditions surrounding that event. Design/methodology/approach – Employing a path-related approach, the authors analyzed large acquisitions of multiple US acquirers in a sequence to be able to clearly identify feedback from preceding acquisitions on subsequent ones. The authors adopt individual acquisition events as the unit of analysis to demonstrate the effect of mindfulness on task performance, and follow the widely used approach of measuring acquisition performance by abnormal stock market returns around the time of an acquisition announcement. Findings – The analysis reveals an alternating relationship between an acquirer's acquisition experience and its acquisition performance. This relationship is positively moderated by an acquirer's cash reserves and by the temporal spacing of its acquisitions, but negatively moderated by an acquirer's market-to-book value. Originality/value – Path-related approaches are rarely used in the mergers & acquisitions literature. The paper is based on the concept of mindfulness and identifies an up to now unrecognized pattern in the performance of multiple acquisitions.
Дисертації з теми "The Acquirer’s Multiple":
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Bramell, Filip, and Alexander Östlund. "Värdeinvestering på Stockholmsbörsen : En kvantitativ studie om den effektiva maknadshypotesen och värdeinvesteringsstrategier på Stockholmsbörsen." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104808.
Анотація:
This study examines the total cumulative return and the total risk-adjusted return for OMXSPI and the two investment strategies The Magic Formula and The Acquirer’s Multiple. The aim is to find out if it’s possible to beat the market over time in contradiction to the efficient market hypothesis. Data has been collected to cover a 15-year period between 2005 and 2020. The results end up challenging the efficient market hypothesis with higher total cumulative returns, but also fairly convincingly higher risk-adjusted returns from the strategies. The study also found that the Acquirer’s Multiple outperformed the Magic Formula with regards to both measures.
Книги з теми "The Acquirer’s Multiple":
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Carlisle, Tobias E. The acquirer's multiple: How the billionaire contrarians of deep value beat the market. 2017.
Частини книг з теми "The Acquirer’s Multiple":
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Bagwari, Ashish, Jyotshana Kanti, and Geetam Singh Tomar. "Multiple Antennas-Based Improved Sensing Detector." In Advances in Wireless Technologies and Telecommunication, 143–63. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-5354-0.ch009.
Анотація:
5G is one of the newest and most acclaimed engineering technology of wireless era. This technology is also known as CRNs, in which spectrum detection plays a key role. Through this chapter, the authors explore multiple antennas-based improved sensing detector (MA_ISD). In the said scheme by using adaptive threshold and multiple antennas patterns, its easy to mitigate sensing failure issue enriches reliability. The presented scheme uses two detectors (TD) concept. The concept of two detectors (i.e., TD scheme has been applied in which multiple antennas are used for electing the quality signals). The considered model upgrades the detection operation and acquires limited or inferior detection time. The first energy detector uses a single adaptive threshold (ED-SAT) while another energy detector employs two adaptive thresholds (ED-TAT). The threshold value is accommodative as it relays on noise variance (σ_ω^2), the behavior of noise variance transforms in accordance with noise signal. Both the detectors run collaboratively and their gain is then supply to a decision device which operates OR functions. In this research work, results shows that with cooperation of two antennas (Nr=2) in multiple antennas-based improved sensing detector (MA_ISD) technique delivers enhancement in detection performance by 24.6%, 53.4%, 37.9%, and 49.6%, in contrast to existing schemes (i.e., EDT-ASS-2015 scheme, ED and cyclo-2010, adaptive SS-2012, and conventional-ED) scheme at -12dB SNR, respectively. During the time, proposed technique also reduces the sensing time in the order of 47.0 ms, 49.0 ms, and 53.2 ms as compared to existing schemes (EDT-ASS-2015, Adaptive SS-2012, and ED and Cyclo-2010) scheme at - 20 dB SNR, respectively.
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Alexandrova-Kabadjova, Biliana, Sara G. Castellanos Pascacio, and Alma L. García-Almanza. "The Adoption Process of Payment Cards." In Simulation in Computational Finance and Economics, 1–28. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2011-7.ch001.
Анотація:
The authors investigate the payment adoption rate under consumers’ and merchants’ awareness of network externalities, given two levels of interchange fees in a multi-agent card market. For the purpose of their research, in multiple instantiations of the model (scenarios) the investigated effects are analyzed over the complete process of adoption, until the market’s saturation point is achieved. Then, for each scenario, a comparison is made between two different levels of interchange fees and different degrees of consumers’ and merchants’ awareness. To this end, the authors model explicitly the interactions between consumers and merchants at the point of sale. They allow card issuers to charge consumers with fixed fees and provide net benefits from card usage, whereas acquirers can charge fixed and transactional fees to merchants.
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Kapatsinski, Vsevolod. "The Web in the Spider: Associative Learning Theory." In Changing Minds Changing Tools, 11–36. The MIT Press, 2018. http://dx.doi.org/10.7551/mitpress/9780262037860.003.0002.
Анотація:
This chapter provides an overview of basic learning mechanisms proposed within associationist learning theory: error-driven learning, Hebbian learning, and chunking. It takes the complementary learning systems perspective, which is contrasted with a Bayesian perspective in which the learner is an ‘ideal observer’. The discussion focuses on two issues. First, what is a learning mechanism? It is argued that two brain areas implement two different learning mechanisms if they would learn different things from the same input. The available data from neuroscience suggests that the brain contains multiple learning mechanisms in this sense but each learning mechanism is domain-general in applying to many different types of input. Second, what are the sources of bias that influence what a learner acquires from a certain experience? Bayesian theorists have distinguished between inductive bias implemented in prior beliefs and channel bias implemented in the translation from input to intake and output to behaviour. Given the intake and prior beliefs, belief updating in Bayesian models is unbiased, following Bayes Theorem. However, biased belief updating may be another source of bias in biological learning mechanisms.
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Li, Xiangyang. "Inference Degradation in Information Fusion." In Methodological Advancements in Intelligent Information Technologies, 92–109. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-970-0.ch006.
Анотація:
Dynamic and active information fusion processes select the best sensor based on expected utility calculation in order to integrate the evidences acquires both accurately and timely. However, inference degradation happens when the same/similar sensors are selected repeatedly over time if the selection strategy is not well designed that considers the history of sensor engagement. This phenomenon decreases fusion accuracy and efficiency, in direct conflict to the objective of information integration with multiple sensors. This chapter tries to provide a mathematical scrutiny of this problem in the myopia planning popularly utilized in active information fusion. In evaluation it first introduces the common active information fusion context using security surveillance applications. It then examines the generic dynamic Bayesian network model for a mental state recognition task and analyzes experimentation results for the inference degradation. It also discusses the candidate solutions with some preliminary results. The inference degradation problem is not limited to the discussed task and may emerge in variants of sensor planning strategies even with more global optimization approach. This study provides common guidelines in information integration applications for information awareness and intelligent decision.
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Otis, Jessica J. "Inspirations." In Aniridia and WAGR Syndrome. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195389302.003.0006.
Анотація:
This chapter is a collection of stories from those who do not let anything keep them from achieving their goals and who inspire us. These individuals show us there is hope and that anything is possible. My name is Eric, and I am 27 years old. I was born with familial (hereditary) aniridia. I also have nystagmus, beginnings of a cataract in my right eye, lens implant in my left eye, and corneal keratopathy in both eyes (but it is worse in my left eye). I am married to my lovely wife, Amber, and we have four children. They are: Joseph (ten years old), Sarah (seven years old), Aniston (four years old), and Christopher (two years old). The two oldest have normal vision and the two youngest have aniridia (how’s that for the law of randomization?). Currently, I work as a research assistant at the University of Florida as part of my doctoral degree. I also own my own company where I work as an occupational therapist with blind and low-vision individuals of all ages. Initially when I went to occupational therapy school, I was not interested in working with people who have vision impairments. Instead, I specialized in working with older adults. After working in the field for several years with older adults, I began to notice that many of my elderly patients had vision problems. Although I grew up with a visual impairment, I did not feel professionally qualified to address their vision issues because learning how to adapt to a visual impairment is different for someone born with a visual impairment than someone who acquires a visual impairment later in life. So I went back to school to gain additional training in working with people who have visual impairments. Part of my job as an occupational therapist is to evaluate patients for specific assistive-technology needs, recommend products that would increase their independence, and to teach patients with multiple disabilities how to use these devices.
Тези доповідей конференцій з теми "The Acquirer’s Multiple":
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Mashtaler, Olga, Olga Mashtaler, Alexander Myasoedov, Alexander Myasoedov, Elizaveta Zabolotskikh, and Elizaveta Zabolotskikh. "POLAR LOW DETECTION USING SOLAB SIOWS ARCTIC PORTAL." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43155187db.
Анотація:
The relevance of the polar lows (PLs) research is justified by their great destructive power and creation of threat to the safety of navigation in the high latitudes and along the Northern Sea Route. The most dangerous effects on maritime activities are strong winds, waves and icing. In addition, the study of the PLs acquires relevance due to the sharp decrease of the sea ice area in the Arctic in recent years and the emergence of areas of open water, suitable for the appearance and development of PLs. However, despite the importance of PLs, they are apparently not sufficiently studied. As there are no meteorological observations in the areas of their appearance, the main source of information about them are satellite observations. By using images on the SOLab SIOWS Arctic Portal from multiple satellites operating in the IR and visible ranges (e.g., MODIS and AVHRR), and using near-water wind fields from high resolution synthetic aperture radars (Sentine-1, ASAR) and low resolution scatterometers (ASCAT), we identify polar lows in various parts of the Arctic, revealing statistical regularities in the appearance of PLs, their distribution and intensity. Collected database of Pls and their characteristics will be used for further PLs forecasting model development.
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Mashtaler, Olga, Olga Mashtaler, Alexander Myasoedov, Alexander Myasoedov, Elizaveta Zabolotskikh, and Elizaveta Zabolotskikh. "POLAR LOW DETECTION USING SOLAB SIOWS ARCTIC PORTAL." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b9442a7fb75.64973319.
Анотація:
The relevance of the polar lows (PLs) research is justified by their great destructive power and creation of threat to the safety of navigation in the high latitudes and along the Northern Sea Route. The most dangerous effects on maritime activities are strong winds, waves and icing. In addition, the study of the PLs acquires relevance due to the sharp decrease of the sea ice area in the Arctic in recent years and the emergence of areas of open water, suitable for the appearance and development of PLs. However, despite the importance of PLs, they are apparently not sufficiently studied. As there are no meteorological observations in the areas of their appearance, the main source of information about them are satellite observations. By using images on the SOLab SIOWS Arctic Portal from multiple satellites operating in the IR and visible ranges (e.g., MODIS and AVHRR), and using near-water wind fields from high resolution synthetic aperture radars (Sentine-1, ASAR) and low resolution scatterometers (ASCAT), we identify polar lows in various parts of the Arctic, revealing statistical regularities in the appearance of PLs, their distribution and intensity. Collected database of Pls and their characteristics will be used for further PLs forecasting model development.
3
Landavazo, Briana, and Vidya K. Nandikolla. "Brain-Computer Interface Application in Robotic Gripper Control." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86274.
Анотація:
In robotics research, the electroencephalograph (EEG) based brain-computer interface (BCI) as a control input has been used in designing prosthesis, wheelchairs and virtual navigation. The paper presents the research work on BCI development that communicates between an operator and a robotic gripping device. The control of a BCI robotic hand is broken down into two main subsystems. The first subsystem acquires a signal from the brain through the Emotiv EPOC EEG headset, extracts features and translates them into an input to the control system. The second subsystem incorporates kinematics and feedback from sensors, to control the multiple degrees of freedom used in the gripping device depending on the action specified by the higher-level BCI control. The BCI is trained to filter and extract features relating to the different hand motions from the data sets. Machine learning is used in conjunction with data filtering, feature extraction, and feature classification techniques to create a more accurate and personalized BCI hand control system. The system analyzes the EEG data, compares with the EEG data patterns from previous attempts. The test results demonstrate the movement functions of the gripper using the BCI, and the success rate for each function are presented in this paper.
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Gao, Zhihong, Diganta P. Narzary, and Je-Chin Han. "Film-Cooling on a Gas Turbine Blade Pressure Side or Suction Side With Compound Angle Shaped Holes." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32098.
Анотація:
The film cooling effectiveness on the surface of a high pressure turbine blade is measured using the Pressure Sensitive Paint (PSP). Four rows of fan-shaped, laid-back compound angled cooling holes are distributed on the pressure side while two such rows are provided on the suction side of the blade. The coolant is only injected to either the pressure side or suction side of the blade at five average blowing ratios from 0.4 to 1.5. Presence of wake due to upstream vanes is simulated by placing a periodic set of rods upstream of the test blade. The wake rods can be clocked by changing their stationary positions to simulate a progressing wake. Effect of wake is recorded at four phase locations with equal intervals along the pitch-wise direction. The free stream Reynolds number, based on the axial chord length and the exit velocity, is 750,000 and the inlet and the exit Mach numbers are 0.27 and 0.44, respectively, resulting in a blade pressure ratio of 1.14. Results reveal that the tip leakage vortices and endwall vortices sweep the coolant film on the suction side to the midspan region. The fan-shaped, laid-back compound angled holes produce good coolant film coverage on the suction side except for those regions affected by the secondary vortices. Due to the concave surface, the coolant trace is short and effectiveness level is low on the pressure surface. However, the pressure side acquires relatively uniform film coverage with the design of multiple rows of cooling holes. The presence of stationary upstream wake results in lower film cooling effectiveness on the blade surface. Variation of blowing ratio from 0.4 to 1.5 shows steady increase in effectiveness on the pressure side or the suction side for a given wake rod phases locations. The compound angle shaped holes outperform the compound angle cylindrical holes by the elevated film cooling effectiveness particularly at higher blowing ratios.
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Patel, Harshkumar, Jianlin Cai, Gautier Noiray, and Subrata Bhowmik. "Digital Transformation and Automation of Flow Assurance Engineering Workflows Using Digital Field Twin." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31017-ms.
Анотація:
Abstract Flow assurance is central to the design of a subsea production system and requires frequent interfacing with engineers from multiple disciplines. The objective of this paper is to demonstrate how cloud based digital field twin can be leveraged to automate subsea flow assurance engineering workflows and consequently, achieve efficient collaborations, faster and reliable designs, and reduced costs. In this proposed workflow, engineers use a web application built on top of a cloud-based digital twin platform to perform flow assurance calculations and design analysis. The web based platform integrates multiphase flow simulators and other relevant engineering tools through python scripts. A user is only required to input design constraints and necessary basic information. The application acquires inter-disciplinary data (e.g. pipeline, layout, equipment, etc.) and automatically performs pre-processing, model setup, simulation, and results processing in the background and make results available to all the users at the front-end. The digital flow assurance platform replaces traditional workflows requiring use of different standalone engineering software, and frequent exchange of information with other engineering teams in form of documents and spreadsheets. The proposed cloud-based workflow allows engineers to focus on technical analysis by eliminating several manual and repeating processes such as accessing different software, creating models, results extraction and formatting, etc. The ability to share results in form of auto-generated reports and formatted spreadsheets; minimizes human errors and promotes information exchange and transparency among project team members from different disciplines. The cloud based platform enables engineers to work on a same project from different geophysical locations and devices. Overall, this digital flow assurance workflow significantly improves engineering efficiency, save costs, and allows faster and reliable concept design and FEED (Front End Engineering Design). The ideas widely discussed for flow assurance digitalization typically include use of data analytics and machine learning, virtual flow metering, real time data monitoring, predictive analytics, etc. This paper, however, presents novel practical idea to bring digital transformation to the way flow assurance engineers work and collaborate.