High-frequency displacement current transformer with just one winding

2019 ◽  
Vol 38 (4) ◽  
pp. 1141-1153 ◽  
Author(s):  
Yahia Achour ◽  
Jacek Starzyński
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
Current Transformer ◽  
Magnetic Core ◽  
Displacement Current ◽  
Frequency Range ◽  
Content Type ◽  
The Core ◽  
Difference Time ◽  
Secondary Winding

Purpose This paper aims to describe a new concept of transformer based on the displacement current. The paper shows how this idea can be translated into reality and presents an example of a working design. Design/methodology/approach The authors replace the primary winding of the transformer with a capacitor. The displacement current between the capacitor plates induces a magnetic flux in the core. This flux in turn induces electromotive force in the classical secondary winding. Findings The basic mathematical aspects illustrated by results obtained from a simulation developed using a commercial software ANSYS-HFSS are given. The saturation of the magnetic core due to the applied high-frequency range is investigated and simulated using a finite difference time domain code implemented in MATLAB. A prototype transformer was built and tested; the obtained results confirm the previous ones from simulations. Originality/value A new concept of the single winding transformer was used as a pulse forming circuit.

Who is a “Senior”? Looking for a definition in the healthcare system

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Monica Consolandi
Keyword(s):  
Quality Of Life ◽  
Health Care ◽  
Healthcare System ◽  
Health Care System ◽  
Design Methodology ◽  
Social Role ◽  
Content Type ◽  
The Core ◽  
Starting Point

Purpose Seniors are nowadays at the core of important reflections to understand both how to ensure them a proper quality of life and better recognize their social role, providing them services and proper health care to value them as persons and resources. This paper aims to find a through definition about who is a senior, in the author’s opinion the starting point to help them flourishing. Design/methodology/approach As an example of definitions, an online dictionary and two geriatric text-books are quoted, highlighting qualities and rights referred to seniors especially in the delicate context of the health-care system. Findings The lack of a commonly shared perspective on this delicate kind of patient entails the difficulty to reach a coherent and satisfying definition about who a senior is. Originality/value The lack of a commonly shared definition leads to inevitable misunderstandings and could explain the arduousness of considering seniors in all their aspects. Further investigations are suggested.

Outsourcing in startups

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Fernanda Kalil Steinbruch ◽  
Bernardo Soares Fernandes ◽  
Leandro da Silva Nascimento ◽  
Paulo Antônio Zawislak
Keyword(s):  
Design Methodology ◽  
Development Stage ◽  
Attractive Alternative ◽  
Content Type ◽  
Core Business ◽  
Secondary Sources ◽  
The Core ◽  
Management Literature ◽  
Structure Knowledge

Purpose The purpose of this paper is to identify the main activities that startups outsource and the elements involved in outsourcing decisions. Design/methodology/approach A multi-case study composed of Brazilian startups was conducted. Data through interviews and secondary sources were obtained. Two groups of startups were considered and analyzed comparatively: startups in the development stage and in the sales stage. Findings The findings show that even though the literature suggests that the core business should not be outsourced, some startups do have to outsource this kind of activity. That was the main difference found between startups in the sales stage and in the development stage: the former group has a solid structure, knowledge and resources, so they can keep the core business inside the firm; whereas the latter group has little experience, scarce knowledge and resources, making outsourcing a more attractive alternative. Originality/value Theoretically, this paper approaches a perspective underexplored in the innovation and management literature: outsourcing in startups. It highlights how outsourcing, as a decision between making and buying, can help startups to improve success potential. In practice, this paper discusses and demonstrates why and what can be outsourced by startups in the development and in the sales stages to overcome their limitations and, consequently, achieve better innovative results.

scholarly journals Accountability reporting objectives of Māori organizations

2018 ◽  
Vol 30 (4) ◽  
pp. 433-443 ◽  
Author(s):  
Russell Craig ◽  
Rawiri Taonui ◽  
Susan Wild ◽  
Lũcia Lima Rodrigues
Keyword(s):  
New Zealand ◽  
Design Methodology ◽  
Indigenous Communities ◽  
Core Values ◽  
Annual Reports ◽  
Content Type ◽  
Cultural Activities ◽  
The Core ◽  
Regional Associations

Purpose This paper aims to highlight the accountability reporting objectives of four Māori-controlled organizations. The examples cited reflect the core values of the indigenous Māori people of New Zealand (Aotearoa) and help demonstrate how these values are manifest in the accountability reporting of Māori-controlled organizations. Design/methodology/approach Narrative sections of ten annual reports of two small and two large Maori organizations, drawn variously from their financial years ending in the calendar years 2009 to 2014, are read closely. These organizations represent diverse tribal and regional associations in terms of size, scope and structure; and in terms of the business, social and cultural activities they pursue. Findings Three core Māori values are identified: spirituality (wairuatanga); intergenerationalism and restoration (whakapapa); and governance, leadership and respect (mana and rangatiratanga). The commitment to these values and the way this commitment is reflected in accountability reports of Maori organizations, is presented. Originality/value The examples provided, and the associated discussion, should help inform reporting initiatives of organizations that are seeking better accountability in terms of their long-term engagement with indigenous communities, the environment and broader society.

Frequency dependent resistance calculation of multiple conductors

2017 ◽  
Vol 36 (5) ◽  
pp. 1396-1410
Author(s):  
Tomislav Župan ◽  
Bojan Trkulja
Keyword(s):  
Design Methodology ◽  
Numerical Approach ◽  
Effective Resistance ◽  
Proximity Effects ◽  
The Finite Element Method ◽  
Frequency Range ◽  
Frequency Dependent ◽  
Content Type ◽  
Electromagnetic Devices ◽  
Practical Implications

Purpose The purpose of this paper is to present a method for calculating frequency-dependent resistance when multiple current-carrying conductors are present. Design/methodology/approach Analytical and numerical formulations are presented. Both skin- and proximity-effects are considered in the numerical approach, whereas only skin-effect can be taken into account in analytical equations. The calculation is done using a self-developed integral equation-based field solver. The results are benchmarked using professional software based on the finite element method (FEM). Findings Results from the numerical approach are in agreement with FEM-based software throughout the whole frequency range. Analytical formulations yield unsatisfactory results in higher frequency range. When multiple conductors are mutually relatively close, the proximity-effect has an impact on effective resistance and has to be taken into account. Research limitations/implications The methodology is presented using axially symmetrical conductors. However, the same procedure can be developed for straight conductors as well. Practical implications Presented fast and stable procedure can be used in most electromagnetic devices when frequency-dependent resistance needs to be precisely determined. Originality/value The value of the presented numerical methodology lies in its ability to take both skin- and proximity-effects into account. As conductors are densely packed in most electromagnetic devices, both effects influence the effective resistance. The method can be easily implemented using a self-developed solver and yields satisfactory results.

Recent civil and criminal enforcement action involving high frequency trading

2015 ◽  
Vol 16 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Matthew Rossi ◽  
Greg Deis ◽  
Jerome Roche ◽  
Kathleen Przywara
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
High Frequency Trading ◽  
Content Type ◽  
Enforcement Action ◽  
The Past ◽  
Trading Patterns ◽  
Federal Prosecutor ◽  
Enforcement Activity ◽  
Practical Implications

Purpose – To alert high frequency trading firms to the increased regulation and prosecution of manipulative trading practices during 2014 and early 2015. Design/methodology/approach – Reviews four significant proceedings against high frequency trading firms (and/or individuals employed by such firms) and other developments from the relevant government agencies as a possible preview of the enforcement and prosecution of high frequency trading practices in 2015. Provides advice to high frequency trading firms on how to decrease the risk of regulatory or criminal actions against them in this changing environment. Findings – Although the focus on high frequency trading has only recently begun to intensify, firms should be aware of the increased enforcement activity of the past year. These actions, both regulatory and criminal, have already resulted in large penalties and have helped initiate a strengthening of rules and regulations regarding manipulative trading practices, of which firms need to be aware and stay current. Practical implications – High frequency trading firms should be aware of the recent regulatory and criminal actions in order to better evaluate their own practices and controls, to ensure that their trading patterns do not resemble manipulative practices, and to avoid similar actions. Originality/value – Practical guidance from experienced litigators and securities regulatory lawyers, including a former SEC Assistant Chief Litigation Counsel and a former federal prosecutor, that consolidates and describes several recent actions and developments in one piece.

scholarly journals Re-orienting the paradigm: path dependence in FDI theory and the emerging multinationals

2019 ◽  
Vol 14 (1) ◽  
pp. 51-69 ◽  
Author(s):  
Jan Knoerich
Keyword(s):  
Emerging Economies ◽  
Direct Investment ◽  
Design Methodology ◽  
Path Dependence ◽  
Theoretical Perspective ◽  
Multinational Enterprise ◽  
Content Type ◽  
The Core ◽  
Emerging Multinationals ◽  
Path Dependent

Purpose The purpose of this paper is to analyze how path dependence in the evolution of major theories of foreign direct investment (FDI) locked in a theoretical perspective of the multinational enterprise that focused on asset-exploitation. This perspective is challenged by recent contradicting observations of multinationals from China and other emerging economies. A decisive re-orientation of FDI theory is proposed as a way forward to resolve this tension. Design/methodology/approach Placing FDI theories into the context of FDI patterns prevailing at the time they were developed, Thomas Kuhn’s framework on the evolution of scientific knowledge is employed to track how the mainstream FDI theory emerged, went through a period of normal science and then approached a crisis of science in this field. Findings The evolution of FDI theory is strongly path-dependent, which made it difficult for theory to effectively incorporate new conceptual discoveries and empirical findings about the nature of FDI activity. Originality/value FDI theory would benefit from a full re-orientation to a demand-oriented perspective which places the pursuit of advantages, assets, resources, etc., at the core of the theory. Such a change is implicit in many recent theoretical advances and would assure theory is generalizable to all types of FDI.

Towards a framework for performing outsourcing capability

2014 ◽  
Vol 7 (3) ◽  
pp. 226-252 ◽  
Author(s):  
Sankalp Pratap
Keyword(s):  
Conceptual Framework ◽  
Design Methodology ◽  
Optimal Management ◽  
Organizational Processes ◽  
Ongoing Activity ◽  
Content Type ◽  
Fast Growing ◽  
The Core ◽  
Successes And Failures

Purpose – The aim of this paper is to go beyond the “What to outsource” and “To Outsource or Not” debate. Recognizing outsourcing as a fast growing reality that firms have to depend upon, the paper concerns itself with optimal management of outsourcing arrangements through the practice of “outsourcing capability”. It argues that outsourcing failure can be mitigated if organizations see outsourcing as an “ongoing activity” to be managed as opposed to treating it as a one-time opportunistic “act”. Design/methodology/approach – Based on the review of existing literature and drawing upon recent instances of outsourcing successes and failures, the paper develops a conceptual framework which divides various organizational processes into four different classes. It delineates the varied aspects of “outsourcing capability” that a firm would need to use to manage these varied class of processes as and when they are outsourced. Findings – There is no “one-size-fits-all” approach to managing outsourced processes. Different processes require emphasis on different aspect of outsourcing capability if outsourcing is to deliver the envisaged benefits. Originality/value – The traditional focus in outsourcing literature has been on the core/non-core process with the recommendation to keep core processes in-house and outsource the non-core processes. This distinction can be transitory and hence detrimental in the era of hyper-competition. I argue that firms should instead focus on developing and refining aspects of “outsourcing capability” relevant to the varied class of processes that they wish/need to outsource.

Why do organizations share their most important capital? The provision of an open innovation model based on human capital

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Elham Sahami ◽  
Ali Safari ◽  
Reza Ansari ◽  
Ali Shaemi Barzoki
Keyword(s):  
Human Capital ◽  
Open Innovation ◽  
Design Methodology ◽  
Social Aspects ◽  
Structured Interviews ◽  
Final Model ◽  
Content Type ◽  
The Core ◽  
Innovation Model ◽  
Inside Out

Purpose In this study, an open innovation (OI) model was designed in which the organization’s human resource systems comprise the main core. To identify the various dimensions of the model, this study aims to investigate how and under what conditions the organizations update and upgrade their knowledge and experiences in the human capital (HC) systems domain within the OI framework and in line with sharing them with other organizations. Design/methodology/approach In this qualitative study, the data were collected by means of semi-structured interviews and analyzed through grounded theory, which led to the extraction of the final model. Findings The implementation of the HC-based OI helps upgrade knowledge in the organization and industry knowledge, create win-win relationships and increase the interaction capital, power and credit of the organization. Originality/value In this study, HC systems have been regarded as the core of the OI model (rather than an intervening factor in OI). This is the main innovative aspect of the current study. In addition, the special attention paid to the inside-out approach to OI and the examination of the human and social aspects of inter-organizational knowledge sharing – particularly in the light of the fact that the study was carried out in a developing country – are the other innovative aspects of this study.

On dialectics in theorizing: the contingent nature of organizational learning

2020 ◽  
Vol 28 (4) ◽  
pp. 957-968
Author(s):  
Norman Meisinger
Keyword(s):  
Organizational Learning ◽  
Design Methodology ◽  
Content Type ◽  
The Core ◽  
The Past ◽  
Conceptual Study

Purpose During the past decades, numerous contributions to organizational learning have emerged. However, these theories are plagued by the same paradoxical core that prevents organizational learning from being unambiguously determined or stably located throughout the entire organization and its individuals. The purpose of this paper is to understand how researchers approach this issue. Design/methodology/approach Through a meta-lens, this conceptual study observes how researchers are taming the paradox of organizational learning, referring exclusively to the theories that deal with its inherent paradox. Findings The author distinguishes fundamentally different theorizing strategies. Therefore, the paper aims not to sharpen the elusive and fuzzy nature of organizational learning but to sharpen the elusive understanding that its nature is fuzzy. As a consequence, the study further emphasizes how challenging an instrumental use of the academic construct of organizational learning for practicing managers outside research laboratories is. Originality/value The paper contributes (first) to the core understanding of the inherently conflicting construct of organizational learning by (second) uncovering the dialectics of the theories concerning it – the former only becomes feasible as a result of the latter.

scholarly journals Airline passengers’ perceptions of service quality: themes in online reviews

2019 ◽  
Vol 31 (2) ◽  
pp. 855-873 ◽  
Author(s):  
Ana Brochado ◽  
Paulo Rita ◽  
Cristina Oliveira ◽  
Fernando Oliveira
Keyword(s):  
Social Media ◽  
Design Methodology ◽  
Online Reviews ◽  
Value For Money ◽  
Content Type ◽  
The Core ◽  
Content Analyses ◽  
Airline Passengers ◽  
Media Platform ◽  
Post Purchase

PurposeThis paper aims to identify the main themes shared in online reviews by airline travellers, as well as which of these themes were linked with higher and lower value for money ratings.Design/methodology/approachThe research used mixed content analyses (i.e. quantitative and qualitative) to examine 1,200 reviews of six airline companies shared by airline travellers in a social media platform.FindingsThe analyses revealed nine themes in descriptions of airline travel experiences. These are the core services during “flights”, “airport” operations, crew and ground “staff”, ticket “classes”, “seats”, inflight “services”, “entertainment”, overall experiences of “airlines” and post-purchase recommendations of with which companies to “fly”. Low value for money ratings are linked with the “airport” and “flights” themes.Originality/valueThe results offer useful insights into airline travellers’ overall experiences based on social media information and facilitate the identification of the main themes linked with different value for money ratings.

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