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Article
Publication date: 19 May 2020

Tobias Weiss

The paper aims to clarify the relationship between energy flexibility and building components and technologies. It determines the energy flexibility potential of buildings in…

152

Abstract

Purpose

The paper aims to clarify the relationship between energy flexibility and building components and technologies. It determines the energy flexibility potential of buildings in relation to their physical characteristics and heat supply systems with respect to external boundary conditions.

Design/methodology/approach

The emphasis of the evaluation is based on the timing and the amount of shiftable and storable thermal loads in buildings under defined indoor thermal comfort conditions. Dynamic building simulation is used to evaluate the potential of selected building characteristics to shift heating loads away from peak demand periods. Insights on the energy flexibility potential of individual technologies are gained by examining the thermal behaviour of single-zone simulation models as different input parameters are varied. For this purpose, parameters such as envelope qualities, construction materials, control systems for heating are modified.

Findings

The paper provides a comprehensive understanding of the influence of the different building parameters and their variations on their energy shifting potential under “laboratory conditions” with steady boundaries. It suggests that the investigated boundary conditions such as outside temperature, infiltration, envelope quality and user behaviour, which influence the heating load of a building, also influence the resulting potential for energy flexibility. The findings show that the combination of a slowly reacting heat transfer system, such as concrete core activation and a readily available storage mass in the room, and a high insulation standard proved to have a high potential to shift heating loads.

Originality/value

In this paper, energy-flexible components were evaluated in a steady-state simulation approach. Outside temperature, solar irradiation and internal loads over the simulation duration were set constant over time to provide laboratory conditions for the potential analysis. On the basis of both duration and performance of the load shifting or storage event, the components were then quantified in a parametric simulation. The determined energy flexibility is directly related to the power of the heating, cooling, hot water and ventilation system, which can be switched on or off. In general, it can be seen that high power (high loads) demand usually can be switched on and off for a short duration, and low power demand usually for a longer duration. The investigated boundary conditions such as outside temperature, infiltration, envelope quality and user behaviour, which influence the load of a building, also influence the resulting potential for energy flexibility. Higher insulation standards, for example, lead to lower loads that can be switched on or off, but increase the duration of the event (flexibility time). So that, in particular, the shiftable load potential is low but results in a long switch-off duration. Furthermore, passive storage potential in buildings like the storage mass inside the room and the type of heat/cooling transfer system can affect the flexibility potential by more than three times. Especially the combination of a high storage mass and a concrete core heat transfer system can significantly increase the flexibility.

Details

Smart and Sustainable Built Environment, vol. 10 no. 4
Type: Research Article
ISSN: 2046-6099

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Article
Publication date: 1 December 2004

Tobias Ortmaier, Holger Weiss and Volkmar Falk

Minimally invasive endoscopic surgery and minimally invasive surgery challenge surgical skills due to the operator's separation from the surgical field and the requirements for…

1127

Abstract

Minimally invasive endoscopic surgery and minimally invasive surgery challenge surgical skills due to the operator's separation from the surgical field and the requirements for long instruments with limited dexterity. To overcome the drawbacks of conventional endoscopic instruments computer‐enhanced telemanipulation systems and robotic systems have been developed in the past. This paper summarizes the requirements for minimally invasive robotic assisted surgery and describes a new robot that has been developed at the German Aerospace Center (DLR). The discussion includes a description of the robotic arm, the appropriate control laws, as well as the requirements for actuated and sensorized instruments.

Details

Industrial Robot: An International Journal, vol. 31 no. 6
Type: Research Article
ISSN: 0143-991X

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Book part
Publication date: 13 August 2018

Robert L. Dipboye

Abstract

Details

The Emerald Review of Industrial and Organizational Psychology
Type: Book
ISBN: 978-1-78743-786-9

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Article
Publication date: 14 March 2016

Tobias Pehrsson

The purpose of this paper is to extend the understanding of innovation research and its contextual boundaries.

619

Abstract

Purpose

The purpose of this paper is to extend the understanding of innovation research and its contextual boundaries.

Design/methodology/approach

The paper opts for a systematic review of literature on innovation. Based on research in the agricultural and forest industries, it analyzes differences between research conducted in a competitive context of strong rivalry and research in a context characterized by strong buyer power. In particular, the review compares types of innovation under investigation and the level at which the innovation occurs.

Findings

It was found that competitive context significantly separates the type of innovation under investigation and innovation at different levels. Thus, the findings provide insights on the importance of competitive context to innovation research.

Research limitations/implications

The findings have implications for the understanding of the sources and directions of innovation, and the formation of innovation at the firm and industry levels. The review also provides a relevant foundation for further research.

Practical implications

The review provides a ground for managerial decision-making regarding innovation. A manager wishing to innovate is advised to evaluate the competitive context. The evaluation is crucial, as the context facilitates different types and levels of innovation.

Originality/value

The review is unique in its emphasis that reviewing studies of innovation requires the consideration of competitive context.

Details

European Business Review, vol. 28 no. 2
Type: Research Article
ISSN: 0955-534X

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Book part
Publication date: 25 September 2020

Deborah Tamakloe

In this chapter, my aim is to describe and analyse conceptually and provide direction for the identification, selection and use of assistive technologies (ATs) to support the…

Abstract

In this chapter, my aim is to describe and analyse conceptually and provide direction for the identification, selection and use of assistive technologies (ATs) to support the education and development of young children with disabilities. The chapter discusses the quality of early intervention practices and the pragmatic role of ATs in delivering effective early intervention impacts. In making this case, the chapter draws upon Vygotsky's cultural-historical theory to illuminate how ATs can be selected and used effectively in schools to enable all young children to thrive in their learning and development in inclusive classrooms.

Details

Assistive Technology to Support Inclusive Education
Type: Book
ISBN: 978-1-78769-520-7

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Article
Publication date: 13 March 2017

René Michel, Igor Schnakenburg and Tobias von Martens

This paper aims to address the effective selection of customers for direct marketing campaigns. It introduces a new method to forecast campaign-related uplifts (also known as…

2228

Abstract

Purpose

This paper aims to address the effective selection of customers for direct marketing campaigns. It introduces a new method to forecast campaign-related uplifts (also known as incremental response modeling or net scoring). By means of these uplifts, only the most responsive customers are targeted by a campaign. This paper also aims at calculating the financial impact of the new approach compared to the classical (gross) scoring methods.

Design/methodology/approach

First, gross and net scoring approaches to customer selection for direct marketing campaigns are compared. After that, it is shown how net scoring can be applied in practice with regard to different strategical objectives. Then, a new statistic for net scoring based on decision trees is developed. Finally, a business case based on real data from the financial sector is calculated to compare gross and net scoring approaches.

Findings

Whereas gross scoring focuses on customers with a high probability of purchase, regardless of being targeted by a campaign, net scoring identifies those customers who are most responsive to campaigns. A common scoring procedure – decision trees – can be enhanced by the new statistic to forecast those campaign-related uplifts. The business case shows that the selected scoring method has a relevant impact on economical indicators.

Practical implications

The contribution of net scoring to campaign effectiveness and efficiency is shown by the business case. Furthermore, this paper suggests a framework for customer selection, given strategical objectives, e.g. minimizing costs or maximizing (gross or lift)-added value, and presents a new statistic that can be applied to common scoring procedures.

Originality/value

Despite its lever on the effectiveness of marketing campaigns, only few contributions address net scores up to now. The new χ2-statistic is a straightforward approach to the enhancement of decision trees for net scoring. Furthermore, this paper is the first to the application of net scoring with regard to different strategical objectives.

Details

Journal of Research in Interactive Marketing, vol. 11 no. 1
Type: Research Article
ISSN: 2040-7122

Keywords

Available. Open Access. Open Access
Article
Publication date: 25 January 2010

Christopher Gibbins, Margaret D. Weiss, David W. Goodman, Paul S. Hodgkins, Jeanne M. Landgraf and Stephen V. Faraone

This is the first study to evaluate ADHD-hyperactive/impulsive subtype in a large clinical sample of adults with ADHD. The Quality of Life, Effectiveness, Safety and Tolerability…

2001

Abstract

This is the first study to evaluate ADHD-hyperactive/impulsive subtype in a large clinical sample of adults with ADHD. The Quality of Life, Effectiveness, Safety and Tolerability (QuEST) study included 725 adults who received clinician diagnoses of any ADHD sub-type. Cross-sectional baseline data from 691 patients diagnosed with the hyperactive/impulsive (HI), inattentive (IA) and combined sub-types were used to compare the groups on the clinician administered ADHD-RS, clinical features and health-related quality of life. A consistent pattern of differences was found between the ADHD-I and combined subtypes, with the combined subtype being more likely to be diagnosed in childhood, more severe symptom severity and lower HRQL. Twenty-three patients out of the total sample of 691 patients (3%) received a clinician diagnosis of ADHD -hyperactive/impulsive subtype. Review of the ratings on the ADHD-RS-IV demonstrated, however, that this group had ratings of inattention comparable to the inattentive group. There were no significant differences found between the ADHD-HI and the other subtypes in symptom severity, functioning or quality of life. The hyperactive/impulsive subtype group identified by clinicians in this study was not significantly different from the rest of the sample. By contrast, significant differences were found between the inattentive and combined types. This suggests that in adults, hyperactivity declines and inattention remains significant, making the hyperactive/impulsive sub-type as defined by childhood criteria a very rare condition and raising questions as to the validity of the HI subtype in adults.

Details

Mental Illness, vol. 2 no. 1
Type: Research Article
ISSN: 2036-7465

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Book part
Publication date: 1 June 2017

Claudette Lafaye and Laurent Thévenot

There are a number of conflicts today involving groups and individuals as regards nature in its various forms. The aim of this article is to examine how these give rise to changes…

Abstract

There are a number of conflicts today involving groups and individuals as regards nature in its various forms. The aim of this article is to examine how these give rise to changes in the forms of critique and justification that underpin them. Based on various points of disagreement as to how nature should be developed, three possibilities of change have been put forward for examination according to the importance of the transformations required: (a) integration of the model into existing orders of justification, (b) development of a new order based on the same model, (c) serious adjustment of the underlying common matrix of orders and the basis it offers for appreciating injustice.

Details

Justification, Evaluation and Critique in the Study of Organizations
Type: Book
ISBN: 978-1-78714-379-1

Keywords

Available. Open Access. Open Access
Article
Publication date: 7 January 2025

Tobias Marx

For nearly 2 decades, the push-pull-mooring (PPM) model has been used frequently by scholars to explain consumers’ service switching intention and behavior. However, heterogeneity…

320

Abstract

Purpose

For nearly 2 decades, the push-pull-mooring (PPM) model has been used frequently by scholars to explain consumers’ service switching intention and behavior. However, heterogeneity and incomparability between PPM model studies are prevalent issues: The chosen predictor variables, their categorization, their measurement, reported effect sizes, and effect directions vary considerably. By addressing these issues, the present meta-analytical review enables future researchers applying the PPM model to identify relevant variables and use valid measurements.

Design/methodology/approach

Based on 148 empirical studies employing the PPM model, the variables used to predict consumers’ service switching intention and behavior, their frequency of use, their categorization into push, pull, and mooring factors, and their measurement are assessed. The effect sizes and directions of the relationships between these variables and consumers’ service switching intention and behavior are analyzed using meta-analytic structural equation modeling. Additionally, the predictive capacity of this model and the influence of moderators are assessed.

Findings

Among the 148 empirical studies, 382 different independent variables were used. The three most frequently used and distinctly categorized independent variables are dissatisfaction (push), alternative attractiveness (pull), and switching costs (mooring). Overall, 152 unique sources were cited to measure these variables and the dependent variables. Dissatisfaction and alternative attractiveness increase switching intention, which positively affects switching behavior, while switching costs decrease switching intention. The model explains 30% of the variance in switching intention and 31% of the variance in switching behavior.

Originality/value

This study provides the first meta-analytical review of the PPM model to guide future research systematically.

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Book part
Publication date: 1 May 2019

Rachel Wexelbaum

This chapter addresses the current state of librarian participation in the global lesbian, gay, bisexual, transgender, and queer+ (LGBTQ+) Wikipedia engagement efforts and…

Abstract

This chapter addresses the current state of librarian participation in the global lesbian, gay, bisexual, transgender, and queer+ (LGBTQ+) Wikipedia engagement efforts and proposes an extended librarian advocacy to advance LGBTQ+ rights and concerns. The author provides a brief history of global LGBTQ+ Wikipedia engagement, librarian involvement in Wikipedia, and librarian participation in global LGBTQ+ Wikipedia initiatives. In the process, the author examines the underrepresentation and invisibility of librarians in global LGBTQ+ Wikipedia engagement efforts and Wikipedia initiatives in general, as well as the barriers that librarians face in becoming active Wikipedian librarians. Based on a review of the literature, the analysis of data gathered from Wikipedia, and the author’s own experiences as an LGBTQ+ Wikipedian librarian, the author recommends strategies for librarians to advocate for and include global LGBTQ+ Wikipedia engagement in their professional practice.

Details

LGBTQ+ Librarianship in the 21st Century: Emerging Directions of Advocacy and Community Engagement in Diverse Information Environments
Type: Book
ISBN: 978-1-78756-474-9

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