1,721,508 research outputs found
The Load of Pulmonary Hypertension
Full text linkVonk Noordegraaf, A. [Promotor]Boonstra, A. [Copromotor
Diagnostic strategy and long-term treatment outcomes in Idiopathic Pulmonary Arterial Hypertension
Full text linkVonk Noordegraaf, A. [Promotor]Boonstra, A. [Copromotor
Some Comments on the Development and Application of Linear Learning Models
No full textThis paper evaluates some learning models and explores the possibility of extending the linear learning models by adding explanatory variables, using Lilien's model as a point of departure. Two parameter estimation schemes are proposed and applied: one at the micro-level using consumer panel data (micro-data) and the other at the macro-level using aggregate time-series data (macro-data). The use of micro-data restrains the estimation of effects to a limited number of decision variables in Lilien's model, because of a lack of degrees of freedom. It is shown that by modifying the equations of Lilien's model and by considering more than two brands the number of degrees of freedom can be increased considerably. This opens the possibility of estimating the response parameters of many more explanatory variables, in theory. However, practically speaking, estimation remains difficult because the parameters in the modified model are heavily restricted by standard probabilistic and other constraints. The endeavor to estimate the parameters of the modified linear learning model using macro-data is not feasible. This leads to the conclusion that the application of learning models in the area of decision-making in marketing is rather difficult and limited.marketing: buyer behavior, marketing: measurement, marketing: pricing
Monitoring the right ventricle in pulmonary arterial hypertension: A non-invasive approach
Full text linkVonk Noordegraaf, A. [Promotor]Boonstra, A. [Copromotor]Marcus, J.T. [Copromotor
Pulmonary arterial hypertension in systemic sclerosis
Full text linkSmit, E.F. [Promotor]Dijkmans, B.A.C. [Promotor]Grünberg, K. [Copromotor]Boonstra, A. [Copromotor]Voskuijl, A.E. [Copromotor
Interpreting an ERP implementation from a stakeholder perspective
Full text linkERP systems are software packages that enable the integration of transactions oriented data and business processes throughout an organization. ERP implementation can be viewed as an organizational change process: many problems related to ERP implementation are related to a misfit of the system with the characteristics of the
organization. This article uses the evidence of a case study to uncover some important dimensions of the organizational change issues related to ERP implementation. The study shows how ERP implementation can impact the interests of stakeholders of the ERP-system and how these groups may react by influencing the course of events, for example by altering the design and implementation in ways that are more consistent with their
interests. Understanding the possible impact of ERP on particular interests of stakeholders may help project managers and others to manage ERP implementations more effectively.
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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