Synthesis of a current source using a formal design methodology

2006 ◽  
Author(s):  
A.M. Pappu ◽  
A.B. Apsel
Keyword(s):  
Design Methodology ◽  
Current Source ◽  
Formal Design ◽  
A Current

scholarly journals Analytical Modeling and Validation of a Preloaded Piezoceramic Current Output

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 353
Author(s):  
Bin Zhang ◽  
Hongsheng Liu ◽  
Dezhi Li ◽  
Jinhui Liang ◽  
Jun Gao
Keyword(s):  
Energy Harvesting ◽  
Integrated Circuit ◽  
Microelectromechanical Systems ◽  
Experimental Testing ◽  
Current Source ◽  
Model Parameters ◽  
Current Output ◽  
System A ◽  
A Current ◽  
Piezoelectric Characteristics

Energy harvesting using piezoceramic has drawn a lot of attention in recent years. Its potential usage in microelectromechanical systems is starting to become a reality thanks to the development of an integrated circuit. An accurate equivalent circuit of piezoceramic is important in energy harvesting and the sensing system. A piezoceramic is always considered to be a current source according to empirical testing, instead of the derivation from its piezoelectric characteristics, which lacks accuracy under complicated mechanical excitation situations. In this study, a new current output model is developed to accurately estimate its value under various kinds of stimulation. Considering the frequency, amplitude and preload variation imposed on a piezoceramic, the multivariate model parameters are obtained in relation to piezo coefficients. Using this model, the current output could be easily calculated without experimental testing in order to quickly estimate the output power in energy harvesting whatever its geometric shape and the various excitations.

Is bribing a good strategy? Imbalanced interdependence and hazard of opportunism in bribery

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ho Wook Shin ◽  
Jinsil Kim ◽  
Seung-hyun Lee
Keyword(s):  
Instrumental Variable ◽  
Design Methodology ◽  
Resource Dependence ◽  
Business Environment ◽  
Government Officials ◽  
Content Type ◽  
Relational Contract ◽  
Current Resource ◽  
The Government ◽  
A Current

PurposeIn fragile institutional environments, firms often have no choice but bribery as the means to access the services monopolized by the government. Corrupt government officials whose resources are valuable to many different firms can easily find other firms willing to offer bribes. The purpose of this paper is to examine whether and how this imbalanced interdependence exposes the bribing firm to the hazard of opportunism from the bribed officials.Design/methodology/approachThis study draws on World Business Environment Survey (WBES) data and the instrumental variable (IV) Probit estimator with Heckman correction for the potential selection bias.FindingsThe authors find that the more firms depend on bribery to acquire governmental resources, the severer the level of opportunism they encounter from the government officials. In addition, the authors find that although the presence of a legal alternative to bribery reduces the level of a corrupt government official's opportunism that a bribing firm experiences, the more firms depend on bribery despite the presence of a legal alternative, the higher the level of the corrupt official's opportunism that the firm will experience. Finally, the authors find that establishing a relational contract with government officials reduces the hazard of opportunism.Originality/valueThe study contributes to the resource dependence literature by finding that a greater imbalance in the interdependence between two parties in bribery exposes the more dependent party to a larger hazard of opportunism. The finding that an ineffective alternative to a current resource provider would not strengthen but weaken a resource seeker's bargaining power expands the literature. The authors also contribute to the corruption research by showing the significant strategic, not legal, risk to bribing firms of engaging in bribery, which to date has not been sufficiently discussed.

The life cycle of a feature: modelling the transitions between feature states

2017 ◽  
Vol 34 (8) ◽  
pp. 1229-1251 ◽  
Author(s):  
Raaid Batarfi ◽  
Aziz Guergachi ◽  
M.I.M. Wahab
Keyword(s):  
Life Cycle ◽  
Design Methodology ◽  
Quality Attributes ◽  
The State ◽  
Detailed Model ◽  
Content Type ◽  
Dead State ◽  
Feature Modelling ◽  
Major Factors ◽  
A Current

Purpose Studies have suggested that attributes are dynamic and a life cycle of product and service attributes exists. When an innovative feature is introduced, the feature might attract and delight customers. However, with the passage of time the state of the attractiveness of this feature may change, for better or for worse. The purpose of this paper is to provide a detailed model that shows the factors and related sub-factors that affect the life cycle of a feature and thereby explain the changes that may happen to a feature over time. Design/methodology/approach This model provide detailed explanations of the direct and indirect factors that affect the states of a feature, the ones that affect the rate of adoption, and the ones that trigger the changes between states. The model uses a current-market product’s feature to discuss the effects of these factors on the life cycle of this feature in detail. Findings This paper extends the theory of attractive quality attributes by identified seven states of the feature in its life cycle. These states are as follows: unknown/unimportant state, honey pot state, racing state, required state, standard state, core state, and dead state. This paper also identified eight major factors that affect the transition of the feature from one state to another. These factors include demographic, socioeconomic, behavioural, psychological, geographical, environmental, organisational, and technological factors. Originality/value The findings of this paper provide additional evidence that product and service attributes are dynamic. This paper also increases the validity of the attractive quality attributes theory and the factors that affect the state of the feature in its life cycle. The understanding of the state of the feature in its life cycle, and the factors that influence this change, helps not only in the introduction of completely new features but also in knowing when to remove obsolescent ones.

A Current Source for Picoammeter Calibration

2007 ◽  
Vol 56 (4) ◽  
pp. 1198-1201 ◽  
Author(s):  
Luca Callegaro ◽  
Vincenzo D'Elia ◽  
Bruno Trinchera
Keyword(s):  
Current Source ◽  
A Current

Conceptualising innovative price models: the RITE framework

2019 ◽  
Vol 14 (4) ◽  
pp. 540-558 ◽  
Author(s):  
Mathias Cöster ◽  
Einar Iveroth ◽  
Nils-Göran Olve ◽  
Carl-Johan Petri ◽  
Alf Westelius
Keyword(s):  
Literature Review ◽  
Design Methodology ◽  
Business Models ◽  
Final Outcome ◽  
Empirical Testing ◽  
Content Type ◽  
Meta Model ◽  
Practical Implications ◽  
A Current ◽  
Structured Literature Review

Purpose The purpose of this paper is to lay a current, research-based foundation for investigation of the concept of innovative price models and its connection to business models. Design/methodology/approach The design is composed of a structured literature review of articles on price models published in 22 journals during 42 years. This then serves as a base for a subsequent conceptual discussion about the foundation of innovative price models. Findings The literature review yields only very few results that are loosely scattered across various areas and mostly without any kind of deeper exploration of the concept of price models. The paper therefore goes on to conceptually explore some fundamental conditions that might influence or even determine price models. The final outcome of this exploration is the relation, intention, technology and environment (RITE) framework that is a meta-model for conceptualising innovative price models. Research limitations/implications The literature review could include additional journals and areas, and empirical testing of the RITE framework as yet has been limited. Practical implications The RITE framework can be used by practitioners as a tool for investigating the potential and usefulness of developing the capability to handle innovative price models. Originality/value The RITE framework provides fundamental conditions, which influence, or even determine, how innovative price models are developed and applied.

scholarly journals Space vector PWM sequence and harmonic comparison for high power current source rectifier

2021 ◽  
Author(s):  
Nagaraja H. Chikkegowda
Keyword(s):  
High Power ◽  
Current Source ◽  
Switching Frequency ◽  
Space Vector Pwm ◽  
Vector Sequence ◽  
Space Vector ◽  
Switching Losses ◽  
Vector Sequences ◽  
Vector Modulation ◽  
A Current

The space vector PWM (SVPWM) schemes for high power current source drives normally produce low order harmonics due to low switching frequency. To provide a SVPWM with the best harmonic performance, different space vector sequences suitable for a current source rectifier (CSR) are investigated in this project. Details on how to achieve the waveform symmetries with minimum switching frequency for each sequence are discussed. A thorough comparison of the harmonic performance of different space vector sequences based on current source rectifier implementations is carried out. An optimum space vector modulation (SVM) method is proposed to achieve the best line current THD and reduced switching losses. The space vector sequence investigation has been verified in simulation and experimentally using a 10kVA GCT based CSR prototype.

Sign in / Sign up

Export Citation Format

Share Document