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1 – 10 of over 1000This paper aims to show how a sociological description – a swarm analysis of the Nazi dictatorship – initially made with the means borrowed from George Spencer-Brown’s Calculus of…
Abstract
Purpose
This paper aims to show how a sociological description – a swarm analysis of the Nazi dictatorship – initially made with the means borrowed from George Spencer-Brown’s Calculus of Indications, can be transformed into a digital circuit and with which methods and tools of digital mathematics this digital circuit can be analyzed and described in its behavior. Thus, the paper also aims to contribute to a better understanding of Chapter 11 of “Laws of Form.”
Design/methodology/approach
The analysis uses methods of automata theory for finite, deterministic automata. Basic set operations of digital mathematics and special set operations of the Boolean Differential Calculus are used to calculate digital circuits. The software used is based on ternary logic, in which the binary Boolean logic of the elements {0, 1} is extended by the third element “Don’t care” to {0, 1, −}.
Findings
The paper confirms the method of transforming a form into a digital circuit derived from the comparative functional and structural analysis of the Modulator from Chapter 11 of “Laws of Form” and defines general rules for this transformation. It is shown how the indeterminacy of re-entrant forms can be resolved in the medium of time using the methods of automata theory. On this basis, a refined definition of the degree of a form is presented.
Originality/value
The paper shows the potential of interdisciplinary approaches between sociology and information technology and provides methods and tools of digital mathematics such as ternary logic, Boolean Differential Calculus and automata theory for application in sociology.
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Yang Tingting, Li Aijun, Muhammad Taimoor and Rooh ul Amin
The purpose of this paper is to propose a high angle of attack short landing model for switched polytopic systems as well as to derive an equation for fluidic thrust vector…
Abstract
Purpose
The purpose of this paper is to propose a high angle of attack short landing model for switched polytopic systems as well as to derive an equation for fluidic thrust vector deflection angle based on pressure to reduce the velocity during the landing phase of flight.
Design/methodology/approach
In this paper, robust control algorithm is proposed for a non-linear high angle of attack aircraft under the effects of non-linearities, tottering hysteresis, irregular and wing rock atmosphere. High angle of attack short landing flight under asynchronous switching is attained by using the robust controller method. Lyapunov function and the average dwell time scheme is used for obtaining the switched polytopic scheme. The asynchronous switching and loss of data are controlled asymptotically. The velocity of aircraft has been lucratively reduced during the landing phase of flight by using the robust controller technique.
Findings
The proposed algorithm based on robust controller including the effects of non-linearities guarantee the successful reduction of velocity for high angle of attack switched polytopic systems.
Practical implications
As the landing phase of an aircraft is one of the complicated stage, this algorithm plays a vital role in stable and short landing under the condition of high angle of attack (AOA).
Originality/value
In this paper, not only the velocity of flight has been reduced, but also the high angle of attack has been attained during the landing phase, because of which the duration of landing has been reduced as well, while in most of the previous research, it is based on low angle of attack and long landing duration.
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This paper describes the development of closed loop control techniques for matrix converter fed induction motor drives. A prototype drive rated at 2.5kW is used to demonstrate…
Abstract
This paper describes the development of closed loop control techniques for matrix converter fed induction motor drives. A prototype drive rated at 2.5kW is used to demonstrate closed loop speed control using vector control technique. Solutions to the special problems associated with the power circuit and implementation of closed loop control in the matrix converter drive are given. Experimental results demonstrating the control techniques are presented for both motoring and generating operations of the matrix converter drive in transient and steady‐state.
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Mohsen Karimi, Mohammad Pichan, Mehdi Sadri and Seyed Morteza Seyedjafari
This paper aims to investigate an improved control method and digital signal processor-based (DSP-based) digital implementation of three-phase standalone inverter. The proposed…
Abstract
Purpose
This paper aims to investigate an improved control method and digital signal processor-based (DSP-based) digital implementation of three-phase standalone inverter. The proposed method is performance developed of the proportional-resonant controller (PRC) with harmonic injection technique, aiming to improve load voltages quality under different loads, especially nonlinear loads. The advanced proposed multi-loop controller is consisted of current harmonic loops for suppressing odd harmonic, which are analyzed in discrete-time domain. Besides, the voltage loop is also used to compensate the output capacitor voltage.
Design/methodology/approach
The proposed method can effectively enlarge output voltage stability with low total harmonics distortion and improve the dynamic transient response. The other advantage of the proposed PRC is the injection of the selective harmonic without any additional calculation compensator.
Findings
The method is given the opportunity to be controlled exactly all harmful outputs with high-quality voltage referenced of the standalone inverter. The proposed method is implemented using a DSP processor (TMS320F28335) and is verified on the 10 kVA three-phase standalone inverter prototype.
Originality/value
The proposed method is performance developed of the PRC with harmonic injection technique, aiming to improve load voltages quality under different loads, especially nonlinear loads.
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Louise Whittaker and Hayley Pearson
The Gordon Institute of Business Science (GIBS), a South African based business school and one of the top ranked business schools in Africa, was yet again facing a crisis during…
Abstract
Case overview
The Gordon Institute of Business Science (GIBS), a South African based business school and one of the top ranked business schools in Africa, was yet again facing a crisis during the COVID-19 pandemic. Having emerged out of an extraordinary year of strict lockdown regulations and having managed a rapid shift to emergency remote teaching. GIBS had managed to maintain its academic programmes, ensuring the completion of the curriculum within the academic year whilst maintaining the exceptionally high standards and quality learning experience it was known for. As 2020 drew to a close, the academic programmes team and the students looked forward to starting the new year in a more “normal” mode of operation. GIBS closed for Christmas holiday with the intent on returning, in early 2021, in some form of face-to-face teaching. However, on the 27th of December 2020, the President of South Africa announced a return to level-3 lockdown as the second wave of infections swept through the country. Strict measures were once again enforced, significantly impacting GIBS’ possible return to campus in January 2021. Reflecting on the lessons learnt over the past year, the Executive Director: Academic Programmes, Professor Louise Whittaker, yet again faced the challenge of deciding how best to proceed given the circumstances. The case illustrates the need for effective change management through the application of Kotter’s 8 steps to transformation, whilst demonstrating the complexity of change management during a crisis. A particular focus on the importance of communication during a change management process in a crisis is illustrated through this case.
Expected learning outcomes
The learning outcomes are as follows: students need to understand that in a crisis, change management will be emergent and requires flexibility and adaptability; students will determine what concrete actions may be required during a change management process in a crisis; students will need to discern that theoretical models do not necessarily fit real world contexts, particularly in a crisis situation; and students will identify aspects that might be missing or inadequately formulated in standard models of change management.
Complexity academic level
The case is positioned at a post-graduate level and would be ideal as a teaching case for business school students on a Master of Business Administration programme, a specialised business masters programme or selected executive education programmes for general managers or senior executives. The case can be taught in a course in the following fields, namely, change management, leadership or strategy.
Supplementary materials
Teaching notes are available for educators only.
Subject code
CSS 11: Strategy.
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Knowledge Industry, ASIS team up to produce database user service. Knowledge Industry Publications Inc., and the American Society for Information Science (ASIS) have joined forces…
Abstract
Knowledge Industry, ASIS team up to produce database user service. Knowledge Industry Publications Inc., and the American Society for Information Science (ASIS) have joined forces to create a four‐faceted Database User Service. The new service will provide an annual print directory, an online directory, a monthly newsletter, and a database hotline.
Focusing on the telecom manufacturing industry in China as a case, this paper contends that the existing literature needs to be expanded. Product cycle theory could be applied to…
Abstract
Focusing on the telecom manufacturing industry in China as a case, this paper contends that the existing literature needs to be expanded. Product cycle theory could be applied to explain multinational corporations’ strategies of importing and localizing their products in developing countries in order to take advantage of lower labor costs and to break barriers to the local markets. However, rapid technology changes have limited the power of traditional product cycle theory while favoring the “dynamic adding‐and‐dropping” product cycle. Meanwhile, the success of “Wintelism” and the maturity of cross‐national production networks in the global market have significant impacts on developing countries’ indigenous industries. Indigenous manufacturers start to take advantage of their strength in the distribution and production value‐chain and to outsource their weaknesses to Western corporations. This model of “reversed cross‐national production networks” represents a feasible industrialization path with great potential to enable indigenous manufacturers to emerge as competitors in advanced Western markets as well as less developed markets.
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Frederick Ng and Julie Harrison
The purpose of this paper is to provide a first-hand, critical reflection on the rapid redesign of a New Zealand university accounting course in response to the COVID-19 pandemic…
Abstract
Purpose
The purpose of this paper is to provide a first-hand, critical reflection on the rapid redesign of a New Zealand university accounting course in response to the COVID-19 pandemic. The authors reflect on their experience of redesigning a course for online delivery, while preserving its focus on transferable skills.
Design/methodology/approach
This paper presents the authors’ commentary on and self-evaluation of the teaching of a final year accounting paper during the COVID-19 pandemic.
Findings
The authors provide lessons for developing transferable skills when pivoting to digital learning under extreme conditions. The authors found a multi-modal approach to course delivery that helped facilitate the development of transferable skills and self-reflection journals were particularly useful for motivating students in an online teaching environment. The authors also identified the efficacy of designing and evaluating online course delivery using a “transferable skills first” template to identify gaps in learning activities and assessments.
Originality/value
The pressures of rapidly pivoting to digital learning threatened the authors’ ability to maintain a focus on transferable skills. The authors provide a design method for maintaining and developing transferable skills in a digital environment using a “transferable-skills first” teaching philosophy.
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Sonya Rapinta Manalu, Jurike Moniaga, Dionisius Andrian Hadipurnawan and Firda Sahidi
Low-cost microcomputers such as the Raspberry Pi are common in library makerspaces. This paper aims to create an OBD-II technology to diagnose a vehicle’s condition.
Abstract
Purpose
Low-cost microcomputers such as the Raspberry Pi are common in library makerspaces. This paper aims to create an OBD-II technology to diagnose a vehicle’s condition.
Design/methodology/approach
An OBD-II scanner plugged into the OBD-II port or usually called the data link connector (DLC), sends diagnostics to the Raspberry Pi.
Findings
Compared with other microcontrollers such as Arduino, the Raspberry Pi was chosen because it sustains the application to receive real-time diagnostics, process the diagnostics and send commands to automobiles at the same time, rather than Arduino that must wait for another process finished to run another process.
Originality/value
This paper also represents the history of mobile technology and OBD-II technology, comparison between Arduino and Raspberry Pi and Node.
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Abstract
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