Search results for " Network"
showing 10 items of 6428 documents
Validation procedures in radiological diagnostic models. Neural network and logistic regression
1999
The objective of this paper is to compare the performance of two predictive radiological models, logistic regression (LR) and neural network (NN), with five different resampling methods. One hundred and sixty-seven patients with proven calvarial lesions as the only known disease were enrolled. Clinical and CT data were used for LR and NN models. Both models were developed with cross validation, leave-one-out and three different bootstrap algorithms. The final results of each model were compared with error rate and the area under receiver operating characteristic curves (Az). The neural network obtained statistically higher Az than LR with cross validation. The remaining resampling validatio…
The Affordances of Reading/Writing on Paper and Digitally in Finland
2014
The aim of this study is to investigate the impact of digital technologies on reading and writing in Finland. The perceived affordances of reading and writing on paper and digitally are compared by analysing written essays collected from 25 communication students in 2013. Research design is replicated from a study of Fortunati and Vincent that concerns Italian students. Results show that Finnish students perceive more positive than negative affordances regarding reading on paper, while reading on screen attracts fewer virtues. In this respect, results are in line with the Italian study. Unlike in Italy, students in Finland value writing on a keyboard especially because it enables editing th…
Road Functional Classification Using Pattern Recognition Techniques
2019
The existing international standards suggest a methodology to assign a specific functional class to a road, by the values of some features, both geometrical and use-related. Sometimes, these characteristics are in contrast with each other and direct the analyst towards conflicting classes for a road or, worse, one or more of these features vary heterogeneously along the road. In these conditions, the analyst assigns the class that, by his capability and experience, he retains the most appropriate, in a very subjective way. On the contrary, the definition of an automatic procedure assuring an objective identification of the most appropriate functional class for each road would be desirable. …
Analysis of Viral Advertisement Re-Posting Activity in Social Media
2016
More and more businesses use social media to advertise their services. Such businesses typically maintain online social network accounts and regularly update their pages with advertisement messages describing new products and promotions. One recent trend in such businesses’ activity is to offer incentives to individual users for re-posting the advertisement messages to their own profiles, thus making it visible to more and more users. A common type of an incentive puts all the re-posting users into a random draw for a valuable gift. Understanding the dynamics of user engagement into the re-posting activity can shed light on social influence mechanisms and help determine the optimal incentiv…
Reward-based crowdfunding campaigns: Informational value and access to venture capital
2018
We consider an entrepreneur who designs a reward-based crowdfunding campaign when the campaign provides a signal about the future demand for the product and subsequent venture capital is needed. We find that both the informativeness of the campaign and considerations related to gaining access to venture capital funding affect the entrepreneur’s choice of campaign instruments, as well as her decision of whether to run a campaign. In particular, entrepreneurs should launch the campaign either when it is highly informative or when it is not informative at all. For relatively low levels of informativeness, but not so low that the venture capitalist (VC) completely ignores the campaign outcome …
Key factors of information management for crowdfunding investor satisfaction
2021
Abstract Crowdlending platforms are becoming increasingly important as a collective financing mechanism for entrepreneurs and small and medium-sized enterprises (SMEs), especially those at an early stage. This study, which is based on a survey of investors on a Spanish crowdlending platform, uses fuzzy-set qualitative comparative analysis (fsQCA) to examine investor satisfaction with crowdlending platforms. Specifically, the study examines communication policies and the quality of the investor experience based on the information provided by these platforms. The value of this article lies in its examination of the antecedents of crowdlending investor satisfaction. The analysis shows that the…
Percepción de los estudiantes universitarios ante una actividad audiovisual con dispositives móviles: un estudio de caso.
2020
El presente estudio radica en el interés que aportan las manifestaciones de los estudiantes universitarios de Magisterio, futuros maestros, desde una vertiente cualitativa y, en menor medida, cuantitativa, sobre el uso de los dispositivos portables, en concreto los teléfonos móviles con apoyo de la red social Facebook, en el proceso de enseñanza y aprendizaje. Se trata de una experiencia educativa centrada en la creación de audiovisuales mediante dispositivos móviles. Los resultados avalan, por un lado, la importancia que los discentes atribuyen al recurso y la motivación que les genera el uso de estas innovadoras metodologías con TIC. Otorgan valor a la necesidad de actualizarse tecnológic…
Business continuity of business models : Evaluating the resilience of business models for contingencies
2019
Company business models are vulnerable to various contingencies in the business environment that may unexpectedly render their business logic ineffective. In particular, technological advancements, such as the Internet of things, big data, sharing economy and crowdsourcing, have enabled new forms of business models that can effectively and abruptly make traditional business models obsolete. By disrupting or even diminishing companies’ revenue streams, environmental contingencies may present a significant threat to business continuity (BC). Evaluating the resilience of business models against these contingencies should therefore be a core area of BC. However, existing BC approaches tend to f…
AN EMPIRICAL VIEW ON VALUE THEORY AND VALUE-BASED MANAGEMENT
2016
The main economic purpose of a business organization is to create value for its owner. The value concept is a complex notion that has developed alongside human history and reflects the concerns of human society through time. As a result of the value theory, the management of value has also emerged as an essential and accompanying activity. Value-based management emerged as a management philosophy rather than a management method. It consists of a change in mindset from managing resources or output quantities to value creation. The challenge is to identify or create the value flows and act upon these within the specific business organization to have proper value management. Value creation and…
L’Analytic Network Process nei processi di trasformazione urbana. Un caso studio a Palermo come occasione per alcune considerazioni teorico-applicati…
2015
Le valutazioni multidimensionali costituiscono un valido strumento a supporto del processo decisionale in risposta a quesiti di tipo diverso (problem solving, ranking, sorting, designing). In particolare, quando i quesiti sono riferiti alle trasformazioni urbane e territoriali, le valutazioni multidimensionali: sono in grado di rappresentare la complessità degli elementi coinvolti a diversi livelli (ad es. ambientale, economico, finanziario, culturale e sociale); facilitano l’esplicitazione dei nodi di conflittualità o di convergenza della pluralità di soggetti portatori di differenti sistemi di valori, di obiettivi e di conoscenze tecniche; rendono trasparenti e ripercorribili tutte le fas…