Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
See detailValue Stream Management Training
Plapper, Peter UL; Oberhausen, Christof UL

Learning material (2016)

The VSM workshop deals with concepts in the area of Value Stream Management, comprising the analysis, design and optimization of internal material and information flows. The VSM workshop was held by Prof ... [more ▼]

The VSM workshop deals with concepts in the area of Value Stream Management, comprising the analysis, design and optimization of internal material and information flows. The VSM workshop was held by Prof. Dr.-Ing. Peter Plapper and M.Sc. Christof Oberhausen, who contribute a profound knowledge in Value Stream Management based on their ongoing research in this field. The one-day VSM workshop is targeted at an audience of 8-12 participants with a background in Lean Engineering or Operational Excellence. [less ▲]

Detailed reference viewed: 141 (8 UL)
Full Text
See detailValue Stream Management zur Synchronisation im Unternehmensverbund
Plapper, Peter UL

Scientific Conference (2016, October)

Das Thema „Wertstrom Management“ wird in Luxemburg bereits in der Bachelor Ausbildung vermittelt und für die Master vertieft. In der Forschung erweist dieses Werkzeug großes Potential zur Synchronisation ... [more ▼]

Das Thema „Wertstrom Management“ wird in Luxemburg bereits in der Bachelor Ausbildung vermittelt und für die Master vertieft. In der Forschung erweist dieses Werkzeug großes Potential zur Synchronisation und Optimierung der Wertschöpfung im Unternehmensverbund, das wir hier vorstellen möchten: Mit der Methode VSM lässt sich Verschwendung erkennen und Wertschöpfungspotentiale heben. Die Verschwendung wird damit nicht nur in den produktiven Unternehmensbereichen, sondern auch in indirekten Bereichen und ebenso in Verwaltungsfunktionen und administrativen Abteilungen visualisiert. Man erkennt Möglichkeiten, die Verschwendung abzubauen und die Wertschöpfung zu erhöhen. Bei der praktischen Anwendung dieses leistungsfähigen Werkzeugs erwiesen sich die Schnittstellen zwischen den Unternehmen als immerwährende Quellen von Verschwendung und Ineffizienzen. Hier sind die unterschiedlichen Ausprägungen der Methode VSM hinderlich für eine durchgängige Anwendung dieser Methode. Aus dieser Erkenntnis heraus schlagen wir eine Vereinheitlichung der „Best Practices“ als Industrie Standard bzw. als internationale Norm vor. Im Rahmen der aktuell laufender Forschungsprojekte an der Universität Luxemburg werden Methoden entwickelt, um das Wertstrom Management international zu standardisieren und allgemein zu vereinheitlichen. [less ▲]

Detailed reference viewed: 346 (10 UL)
Full Text
Peer Reviewed
See detailValue Stream Mapping (VSM) to Evaluate and Visualize Interrelated Process-Chains Regarding Circular Economy
Mangers, Jeff UL; Minoufekr, Meysam UL; Plapper, Peter UL

in Advances in Production Management Systems. Artificial Intelligence for Sustainable and Resilient Production Systems (2021, August 31), 633

The concept of circular economy (CE) aims to close and slow resource loops without neglecting the goals of sustainable development. Recently, the concept received encouraging attention among researchers ... [more ▼]

The concept of circular economy (CE) aims to close and slow resource loops without neglecting the goals of sustainable development. Recently, the concept received encouraging attention among researchers and business experts to be a convenient solution to move away from the finite linear economy concept to a more sustainable solution. However, this change of paradigm is only possible if we consider systems in a holistic manner and can localize the preventing hurdles. Value stream mapping (VSM) is a commonly known lean method, used to develop current state visualization of product and information flows within organization, helping to seek weaknesses and improve process flows. The motivation of this paper is a new C-VSM model, which enables its users to evaluate and visualize connected process-chains regarding CE on different levels in a holistic manner. For this purpose, the traditional VSM model was adapted towards the needs and requirements of CE through the application of a new representation method, additional indicators, and an appropriated evaluation system. C-VSM is in line with the current political and industrial objectives to apply CE principles by enabling a holistic reflection and consideration of supply-chains (SCs) on different levels. The model itself is validated through an extensive cross-company case study. [less ▲]

Detailed reference viewed: 100 (20 UL)
Peer Reviewed
See detailValue Transmission and Zeitgeist revisited
Boehnke, Klaus; Hadjar, Andreas UL; Baier, Dirk et al

in Schönpflug, Uta (Ed.) Cultural Transmission. Psychological, Developmental, Social and Methodological Aspects (2009)

Detailed reference viewed: 165 (0 UL)
Peer Reviewed
See detailValue-added modeling in primary school: What covariates to include?
Levy, Jessica UL; Brunner, Martin; Keller, Ulrich UL et al

Scientific Conference (2019, August)

Detailed reference viewed: 140 (9 UL)
Peer Reviewed
See detailValue-Added Modelling in Primary and Secondary School: An Integrative Review of 674 Publications
Levy, Jessica UL; Keller, Ulrich UL; Brunner, Martin et al

Scientific Conference (2017, December)

Value-added (VA) modelling aims to quantify the effect of pedagogical actions on students’ achievement, independent of students’ backgrounds (e.g., [1]); in other words, VA strives to model the added ... [more ▼]

Value-added (VA) modelling aims to quantify the effect of pedagogical actions on students’ achievement, independent of students’ backgrounds (e.g., [1]); in other words, VA strives to model the added value of teaching. VA is typically used for teacher and/or school accountability (e.g., [2]). Although, VA models have gained popularity in recent years—a substantial increase of publications is to be observed over the last decade—, there is no consensus on how to calculate VA, nor is there a consensus whether and which covariates should be included in the statistical models (e.g., [3]). The aim of the present study is to conduct a to date non-existent integrative review on VA modelling in primary and secondary education. Starting with an exhaustive literature research in the ERIC, Scopus, PsycINFO, and Psyndex databases, we reviewed and thoroughly classified 674 VA publications from 32 different countries. Half of the studies investigated VA models at teacher level; the remaining looked at school or principal level. 370 studies used empirical data to calculate VA models. Most of these studies explained their covariates, but approximately 15% did not specify the model. Most studies used prior achievement as a covariate, but cognitive and/or motivational student data were almost never taken into consideration. Moreover, most of the studies did not adjust for methodological issues such as missing data or measurement error. To conclude, given the high relevance of VA—it is primarily used for high-stakes decisions— more transparency, rigor and consensus are needed, especially concerning methodological details. References [1] Braun, H. I. (2005). Using student progress to evaluate teachers: A primer on value-added models. Princeton, NJ: Educational Testing Service. [2] Sanders, W. L. (2000). Value-added assessment from student achievement data: Opportunities and hurdles. Journal of Personnel Evaluation in Education, 14(4), 329–339. [3] Newton, X., Darling-Hammond, L., Haertel, E., & Thomas, E. (2010). Value-added modeling of teacher effectiveness: An exploration of stability across models and contexts. Education Policy Analysis Archives, 18(23). [less ▲]

Detailed reference viewed: 171 (26 UL)
Peer Reviewed
See detailValue-added models: To what extent do estimates of school effectiveness depend on the selection of covariates?
Levy, Jessica UL; Brunner, Martin; Keller, Ulrich UL et al

Scientific Conference (2019, September)

Detailed reference viewed: 100 (6 UL)
Full Text
Peer Reviewed
See detailValue-Added Scores Show Limited Stability over Time in Primary School
Emslander, Valentin UL; Levy, Jessica; Scherer, Ronny et al

in PLoS ONE (2022), 17(12), 0279255

Value-added (VA) models are used for accountability purposes and quantify the value a teacher or a school adds to their students’ achievement. If VA scores lack stability over time and vary across outcome ... [more ▼]

Value-added (VA) models are used for accountability purposes and quantify the value a teacher or a school adds to their students’ achievement. If VA scores lack stability over time and vary across outcome domains (e.g., mathematics and language learning), their use for high-stakes decision making is in question and could have detrimental real-life implications: teachers could lose their jobs, or a school might receive less funding. However, school-level stability over time and variation across domains have rarely been studied together. In the present study, we examined the stability of VA scores over time for mathematics and lan- guage learning, drawing on representative, large-scale, and longitudinal data from two cohorts of standardized achievement tests in Luxembourg (N = 7,016 students in 151 schools). We found that only 34–38% of the schools showed stable VA scores over time with moderate rank correlations of VA scores from 2017 to 2019 of r = .34 for mathematics and r = .37 for language learning. Although they showed insufficient stability over time for high-stakes decision making, school VA scores could be employed to identify teaching or school practices that are genuinely effective—especially in heterogeneous student populations. [less ▲]

Detailed reference viewed: 45 (4 UL)
Full Text
See detailValue-at-risk: A practical introduction
Schiltz, Jang UL

Conference given outside the academic context (2007)

Detailed reference viewed: 43 (1 UL)
Full Text
Peer Reviewed
See detailValue-based practical reasoning: Modal Logic + Argumentation
Luo, Jieting; Liao, Beishui; Gabbay, Dov M. UL

in Frontiers in Artificial Intelligence and Applications (2022), 353

Autonomous agents are supposed to be able to finish tasks or achieve goals that are assigned by their users through performing a sequence of actions. Since there might exist multiple plans that an agent ... [more ▼]

Autonomous agents are supposed to be able to finish tasks or achieve goals that are assigned by their users through performing a sequence of actions. Since there might exist multiple plans that an agent can follow and each plan might promote or demote different values along each action, the agent should be able to resolve the conflicts between them and evaluate which plan he should follow. In this paper, we develop a logic-based framework that combines modal logic and argumentation for value-based practical reasoning with plans. Modal logic is used as a technique to represent and verify whether a plan with its local properties of value promotion or demotion can be followed to achieve an agent's goal. We then propose an argumentation-based approach that allows an agent to reason about his plans in the form of supporting or objecting to a plan using the verification results. [less ▲]

Detailed reference viewed: 18 (1 UL)
Full Text
Peer Reviewed
See detailValue-oriented Legal Argumentation in Isabelle/HOL
Benzmüller, Christoph; Fuenmayor Pelaez, David UL

in International Conference on Interactive Theorem Proving (ITP-2021) - Proceedings (2021)

Detailed reference viewed: 59 (1 UL)
See detailValues and ideals in teachers’ professional judgement
Biesta, Gert UL

in Gewirtz, S.; Mahony, P.; Hextall, I. (Eds.) et al Changing teacher professionalism. (2009)

Detailed reference viewed: 326 (0 UL)
See detailValues and valuing at work
de Saint-Georges, Ingrid UL

Presentation (2017, November 20)

Detailed reference viewed: 101 (2 UL)
Full Text
Peer Reviewed
See detailThe values of web archives
Schafer, Valerie UL; Winters, Jane

in International Journal of Digital Humanities (2021)

This article considers how the development, promotion and adoption of a set of core values for web archives, linked to principles of “good governance”, will help them to tackle the challenges of ... [more ▼]

This article considers how the development, promotion and adoption of a set of core values for web archives, linked to principles of “good governance”, will help them to tackle the challenges of sustainability, accountability and inclusiveness that are central to their long-term societal and cultural worth. It outlines the work that has already been done to address these questions, as web archiving begins to move out of its establishment phase, and then discusses seven key principles of good governance that might be adapted by and embedded within web archives: participation, consensus, accountability, transparency, effectiveness and efficiency, inclusivity and legality. The article concludes with a call to action for researchers and archivists to co-create the core values for web archives that will be required if they are to remain a vital part of our cultural heritage infrastructure. [less ▲]

Detailed reference viewed: 90 (2 UL)
Peer Reviewed
See detailValues-Based Territorial Food Networks (VTFN): conceptual framework spanning Local Food Systems (LFS), Short Food Supply Chains (SFSC), Civic Food Networks (CFN) and Alternative Food Networks (AFN)
Reckinger, Rachel UL

Scientific Conference (2021, September 02)

Localized food growing and livestock rearing initiatives with more direct transformation and commercialization structures, often at comparably small scales, gained ground worldwide. They represent various ... [more ▼]

Localized food growing and livestock rearing initiatives with more direct transformation and commercialization structures, often at comparably small scales, gained ground worldwide. They represent various types of ‘alternatives’ to industrialised agri-food processes and to standard producers/consumers divides characterizing the global food system. While these alternatives are not always new, they have sparked growing scholarly interest. Over time, the literature has addressed them via four main conceptual denominations: Local Food Systems (LFS), Short Food Supply Chains (SFSCs), Civic Food Networks (CFS), Alternative Food Networks (AFN). These concepts have distinct foci, partial overlaps, and they seek to capture an immense heterogeneity of empirical phenomena. Yet this conceptual plurality risks to conceal that these empirical initiatives, despite their differences, have structural commonalities at food system level, relevant for understanding pathways to a sustainable food system transformation. Therefore, I argue for an overarching concept subsuming the existing ones. Values-based Territorial Food Networks (VTFN) would take into account the diverse perspectives from the four main concepts in this field, classify their specificities and address their shortcomings. The social critique at their core, leading to transitions, is constructed around values of ’doing things differently’, at the level of specific territories. The more robust and authentic these sustainability values in VTFN are – in terms of environmental integrity, social well-being, economic resilience and ethical governance – the more likely they are to be incorporated into practices, to become more and more legitimate and gain a voice at negotiation tables, in order to help reorient the current corporate agrifood regime. [less ▲]

Detailed reference viewed: 77 (5 UL)
Full Text
Peer Reviewed
See detailValues-based territorial food networks Qualifying sustainable and ethical transitions of alternative food networks.
Reckinger, Rachel UL

in Regions & Cohesion (2022), 12(3, Winter 2022), 78-109

This comparative literature review of local food systems, short food supply chains, and civic food networks, subsumed under alternative food networks (AFN), suggests converging them into the novel ... [more ▼]

This comparative literature review of local food systems, short food supply chains, and civic food networks, subsumed under alternative food networks (AFN), suggests converging them into the novel umbrella-term values-based territorial food networks (VTFN). Based on the analysis of specificities and shortcomings in the four concepts, VTFN aims to enhance conceptual clarity, while the current coexistence conceals structural and systemic commonalities—relevant for understanding pathways to ethical and sustainable food system transformations. Taking stock of issues in the four concepts, VTFN strives to be overarching and pragmatic. It qualifi es AFN’s “alternativeness” through social, economic, environmental and governance “sustainability values” and through the co-construction of “territoriality” in varying constellations. Thus, it fosters integrated scientific dialogue about conceptual determinations of emerging networks of food system transitions worldwide. [less ▲]

Detailed reference viewed: 649 (18 UL)
See detailValuing American options using fast recursive projections
Cosma, Antonio UL

Scientific Conference (2013, July 16)

Detailed reference viewed: 150 (7 UL)
Full Text
See detailValuing American options using fast recursive projections
Cosma, Antonio UL; Galluccio, Stefano; Pederzoli, Paola et al

E-print/Working paper (2015)

We introduce a fast and widely applicable numerical pricing method that uses recursive projections. We characterize its convergence speed. We find that the early exercise boundary of an American call ... [more ▼]

We introduce a fast and widely applicable numerical pricing method that uses recursive projections. We characterize its convergence speed. We find that the early exercise boundary of an American call option on a discrete dividend paying stock is higher under the Merton and Heston models than under the Black-Scholes model, as opposed to the continuous dividend case. A large database of call options on stocks with quarterly dividends shows that adding stochastic volatility and jumps to the Black-Scholes benchmark reduces the amount foregone by call holders failing to optimally exercise by 25%. Transaction fees cannot fully explain the suboptimal behavior. [less ▲]

Detailed reference viewed: 146 (9 UL)
See detailValuing American options using fast recursive projections
Cosma, Antonio UL; Galluccio, Stefano; Pederzoli, Paola et al

Scientific Conference (2016, May)

Detailed reference viewed: 91 (4 UL)