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Frank Schwierz, Valentin Nakov and Matthias Roßberg
An simple model for the simulation of the electrical behaviour of several types of junction controlled field‐effect transistors is proposed. It is based on the calculation of the…
Abstract
An simple model for the simulation of the electrical behaviour of several types of junction controlled field‐effect transistors is proposed. It is based on the calculation of the carrier concentration in the channel by means of a self‐consistent solution of Schrödinger and Poisson's equation in the direction perpendicular to the current flow. Based on the carrier concentration the dc, the small‐signal, and also the noise properties of the devices may be simulated. The calculated characteristics of a sub‐quarter micron gate GaAs MESFET, a δ‐doped GaAs FET and a Velocity Modulation Transistor will be presented and discussed.
A hydrodynamic semiconductor device simulator, DYNA, is introduced. A new relaxation time evaluation scheme for two‐valley semiconductors is proposed to account for the dependence…
Abstract
A hydrodynamic semiconductor device simulator, DYNA, is introduced. A new relaxation time evaluation scheme for two‐valley semiconductors is proposed to account for the dependence of the electron mobility on the impurity scattering. Some robust solution methods are used in the simulator for treating the highly nonlinear system of equations. The simulation results for a nonuniformly‐doped GaAs MESFET are also shown.
Sue Ogilvy, Danny O'Brien, Rachel Lawrence and Mark Gardner
This paper aims to demonstrate methods that sustainability-conscious brands can use to include their primary producers in the measurement and reporting of the environment and…
Abstract
Purpose
This paper aims to demonstrate methods that sustainability-conscious brands can use to include their primary producers in the measurement and reporting of the environment and sustainability performance of their supply chains. It explores three questions: How can farm businesses provide information required in sustainability reporting? What are the challenges and opportunities experienced in preparing and presenting the information? What future research and policy instruments might be needed to resolve these issues.
Design/methodology/approach
This study identifies and describes methods to provide the farm-level information needed for environmental performance and sustainability reporting frameworks. It demonstrates them by compiling natural capital accounts and environmental performance information for two wool producers in the grassy woodland biome of Eastern Australia; the contrasting history and management of these producers would be expected to result in different environmental performances.
Findings
The authors demonstrated an approach to NC accounting that is suitable for including primary producers in environmental performance reporting of supply chains and that can communicate whether individual producers are sustaining, improving or degrading their NC. Measurements suitable for informing farm management and for the estimation of supply chain performance can simultaneously produce information useful for aggregation to regional and national assessments.
Practical implications
The methods used should assist sustainability-conscious supply chains to more accurately assess the environmental performance of their primary producers and to use these assessments in selective sourcing strategies to improve supply chain performance. Empirical measures of environmental performance and natural capital have the potential to enable evaluation of the effectiveness of sustainability accounting frameworks in inducing businesses to reduce their environmental impacts and improve the condition of the natural capital they depend on.
Social implications
Two significant social implications exist for the inclusion of primary producers in the sustainability and environmental performance reporting of supply chains. Firstly, it presently takes considerable time and expense for producers to prepare this information. Governments and members of the supply chain should acknowledge the value of this information to their organisations and consider sharing some of the cost of its preparation with primary producers. Secondly, the “additionality” requirement commonly present in existing frameworks may perversely exclude already high-performing producers from being recognised. The methods proposed in this paper provide a way to resolve this.
Originality/value
To the best of the authors’ knowledge, this research is the first to describe detailed methods of collecting data for natural capital accounting and environmental performance reporting for individual farms and the first to compile the information and present it in a manner coherent with the Kering EP&L and the UN SEEA EA. The authors believe that this will make a significant contribution to the development of fair and standardised ways of measuring individual farm performance and the performance of food, beverage and apparel supply chains.
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This paper details a teacher-implemented intervention, negotiating learner-generated materials, with the aim of improving low levels of learner motivation. This had resulted from…
Abstract
This paper details a teacher-implemented intervention, negotiating learner-generated materials, with the aim of improving low levels of learner motivation. This had resulted from the introduction of a problematic entry test policy acting as gatekeeper to an internationally-accredited diploma course in the learners’ specialized technical subject. For the learners, successful completion of the diploma course would guarantee social and financial benefits including promotion, increased salary and prestige within the military institution. However, an order came from the commanding officer that learners would only be accepted onto the diploma course if they attained an IELTS test score of Band 5. This requirement was not attainable by the learners in the time available and represented a threat to their career aspirations, which would negatively affect them personally, economically and professionally. Consequently, there was a substantial drop in learner motivation. An intervention was constructed and conducted during the course over a two-week period to supplement students’ course book in order to counter such poor levels of motivation. The study was set within the critical paradigm, using quantitative and qualitative data collecting methods to answer my research question: “To what extent does the intervention (asking learners to choose a topic, select original material, and suggest the type of tasks to be produced for the material) have a positive effect on learners’ levels of motivation?” Key findings included an observed increase in learner engagement and a greater level of concentration than in recent classes together with reduced learner worry about the IELTS test. Several conclusions are offered as to the efficacy of conducting such an intervention and how it could impact on learner motivation.
David Parra-Camacho, Rómulo Jacobo González-García and Manuel Alonso-Dos-Santos
To examine the social impact of a small-scale sporting event and its influence on the willingness to support future events.
Abstract
Purpose
To examine the social impact of a small-scale sporting event and its influence on the willingness to support future events.
Design/methodology/approach
A self-supplied questionnaire was used with 248 residents-sportspeople that participated in the Valencia Triathlon. Descriptive analysis, exploratory and confirmatory factorials were done through SPSS, FACTOR and EQS.
Findings
Three dimensions of positive impacts were identified; sporting participation and city image, social development and human capital and economic development. The impacts in sporting participation and in the improvement to the image of the city contribute to positively explaining the willingness to support the holding of sporting events. Local sportspeople highlight their participative component and the projection of the city image as key factors to endorse holding future sporting events as a strategy for tourism.
Research limitations/implications
The convenience sampling limits the extrapolation of the results.
Practical implications
Making the most of the intangible aspects is recommended due to the great potential these events have to generate social capital and increase the networks of social collaboration. Give a more active role to volunteers and local organizers in an organization. Transmit the pride of the community and the sense of belonging to this community to the media and advertising communication.
Social implications
Small scale sporting events can contribute to improving the quality of life, increasing pride, the sense of belonging of the residents, opportunities for entertainment and encouraging local participation.
Originality/value
A contribution to the empirical analysis of the social impact of small-scale sporting events from the perspective of local participants.
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This report explored enriched notions and dimensions of quality massive open online courses (QMOOCs). The purpose of this paper is to visualize the quality measures adjacent to…
Abstract
Purpose
This report explored enriched notions and dimensions of quality massive open online courses (QMOOCs). The purpose of this paper is to visualize the quality measures adjacent to MOOCs and understanding distinctive outlooks to approaching them. It was also of interests to envisage how and in what routines those notions and dimensions interrelated.
Design/methodology/approach
Exploratory-design was employed to qualitatively establishing conceptual and operational frameworks first through reviewing processes and focus-group discussions. QMOOCs were reflected by four dimensions: scientifically provable, technically feasible, economically beneficial and socio-culturally adaptable. Besides, QMOOCs involved six notions (6P: presage, process, product, practicability, prospective and power) and affected knowledge, skills and professionalism (KSP). Quantitatively, QMOOCs, 6P and KSP were the moderating, independent and dependent variables, respectively. Associated data were accumulated through survey by distributing 600 questionnaires randomly to 708 Universitas Terbuka faculty members; 299 of them were completed.
Findings
Nine hypotheses were scrutinized utilizing structural-equation model and eight were validated by the analysis. It was statistically inferred that product was alluded as the prime notion to QMOOCs followed by process, practicability, presage and power; prospective was excluded. Professionalism, knowledge and skill were influenced by QMOOCs. Importance-performance analysis (IPA) and customer-satisfaction index were emulated (and applied) to quantify respondents opinion and relevance degree of those engaged notions and dimensions. IPA analysis revealed four prominent notions (corresponding, functional, well-defined and learner-focused) and one dimension (technically feasible).
Originality/value
Qualitative framework was imperfectly confirmed by the quantitative upshot. Further inquiry is crucial searching for plausible validation how this consequence was marginally distinctive in conjunction with authenticating QMOOCs.
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In the first part of the paper, which outlines the laboratory and field investigations on corrosion by flue gases from solid fuel combustion carried out by the British Coal…
Abstract
In the first part of the paper, which outlines the laboratory and field investigations on corrosion by flue gases from solid fuel combustion carried out by the British Coal Utilisation Research Association, the effects of different flue gas constituents on corrosion phenomena are discussed. Laboratory studies of the effects of fuel type and method of combustion on the sulphuric acid content of combustion gases are described. The second part presents the results of measurements of the condensation characteristics of flue gases from water‐tube boilers in power stations and from various industrial boilers and furnaces; investigations into the use of additives are described briefly. The final section is concerned with some theoretical considerations of effects of fuel type, burning rate, etc., on the amounts of sulphuric acid likely to be present in the combustion products from domestic appliances.
Most researchers examining educational disparities in unintended pregnancy take a rational-choice perspective, defining pregnancy intention as a fixed state within…
Abstract
Purpose
Most researchers examining educational disparities in unintended pregnancy take a rational-choice perspective, defining pregnancy intention as a fixed state within decontextualized individuals. However, evidence suggests that women’s reproductive intentions may be more relational than rational, and that relationship context varies by education. This study investigated if relationship context could explain educational disparities in unintended pregnancy.
Methodology
Using the 2006–2015 National Survey of Family Growth (n = 4,320 pregnancies), I calculated structural equation models and predicted probabilities to examine if relational stability (marital status) and partner specificity (wanting a baby with a particular man) mediated the association between education and pregnancy intendedness for White, Hispanic, and Black women.
Findings
Relational stability and partner specificity mediated the association between education and pregnancy intention for all three groups. Education was rendered insignificant after controlling for race, marital status, partner specificity, and age. Marital status was a better predictor for White women than Hispanic women, and was not statistically significant for Black women. Partner specificity had greater influence on pregnancy intendedness than marital status, and its effect varied only slightly by race. Thus, disparities in marriage and access to desired partners influence educational disparities in unintended pregnancy.
Implications
These findings suggest that partner specificity could prove particularly useful in predicting unintended pregnancy as rates of non-marital pregnancies continue to rise. They also indicate that a shift in research and policy focus from decontextualized individuals to relationships between women and men is warranted.
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Having considered various types of pedagogy as well as technology affordances and multimedia learning principles, this chapter focuses on issues surrounding the representation and…
Abstract
Having considered various types of pedagogy as well as technology affordances and multimedia learning principles, this chapter focuses on issues surrounding the representation and sharing of content using technology. Anderson & Krathwohl’s (2001) Taxonomy of Learning, Teaching and Assessing is examined as a means of conceptualizing different types of thinking processes in a way that can be applied across discipline areas. The representational requirements of different subject areas (English, mathematics, science, history, geography, and computing) are explored by means of examples, with reference to the role of technology and the range of possible tasks that may be utilized. Assessment issues as they relate to the representation of content are also considered. The broader contextual shift toward open education and sharing is discussed, including key drivers such as learning object repositories, open educational resources, Creative Commons licensing, and massive open online courses.