Search results for " ingegneria"

Revenue models, in-app purchase, and the app performance: Evidence from Apple's App Store and Google Play

2016

The effect of revenue models on app performance depends on the app store.The effect of in-app purchase on app performance depends on the app store.Paid, freemium and in-purchase models are shown to be effective in app store.Freemium and in-app purchase models are shown to be less effective in Google Play.App category influences the effects of both revenue models and in-app purchase. In this paper, we empirically examine how the revenue model (paid, free, or freemium) adopted for a given app affects the app revenue performance as measured by the app daily revenue rank. We also study the impact of in-app purchase on this measure of performance. Moreover, we study how such relationships are co…

Co-deposition and characterization of hydroxyapatite-chitosan and hydroxyapatite-polyvinylacetate coatings on 304 SS for biomedical devices

2019

During the last decades, biomaterials have been deeply studied to fabricate and improve coatings for biomedical devices. Metallic materials, especially in the orthopedic field, represent the most common materials used for different type of devices thanks to their good mechanical properties. Nevertheless, low/medium resistance to corrosion and low osteointegration ability characterizes these materials. To overcome these problems, the use of biocoatings on metals substrate is largely diffused. In fact, biocoatings have a key role to confer biocompatibility features, to inhibit corrosion and thus improve the lifetime of implanted devices. In this work, the attention was focused on Hydroxyapati…

How do I rule my solver’s relationship? An empirical investigation of governance structures in crowdsourcing contests

2016

In order to continually innovate, companies are increasingly opening their boundaries and signing crowdsourcing agreements with solution providers. However, crowdsourcing scholars are no closer to understanding how possible solvers’ opportunistic behaviours affect the governance structure proposed by the seeker at the moment the challenge is broadcast. Building on the managerial-choice approach of transaction cost economics, we aim to examine how contract conditions, specified in the request for proposal (RFP), aiming to reduce the effect of solver’s opportunistic behaviours whilst influencing seekers’ preferences toward proposing contractual agreements to manage the working relationship wi…

LEVERAGING CROWDSOURCING COMMUNITY TO INCREASE THE CHANCES OF WINNING CONTESTS: A SIGNALLING THEORY APPROACH

CROWDSOURCING COMMUNITY NETWORK AND SOLVERS’ SUCCESS

THE EFFECT OF ASSUMING DIFFERENT POSITIONS IN THE CROWDSOURCING COMMUNITY NETWORK ON SOLVERS’ SUCCESS

POSITIONS IN CROWDSOURCING COMMUNITY NETWORK AND SOLVERS’ SUCCESS

An Open Innovation Decision Support System to Select a Biopharmaceutical R&D Portfolio

2016

Drugs available in the market today, selected several years ago under very uncertain future scenario, have experienced a long and expensive process of research and development carried out following both a closed and an open innovation path. To support this critical selection process, we propose a Decision Support System, able to choose among different candidates the most promising drugs along their best development path. The Decision Support System, based on a real options portfolio optimization model, mapping tools, and what-if rules as well, has been applied to a numerical example available in literature, and the research findings show interesting managerial and academic implications

A comprehensive analysis for N2O mechanisms by advanced mathematical techniques

2018

Recent evaluation of the existing activated sludge models, incorporating nitrous oxide (N2O) formation, is only based on the capabilities and inabilities in describing experimental data under different conditions. This paper will present an advanced mathematical modeling framework (i.e. coupling global sensitivity, identifiability and uncertainty analysis) for a comprehensive analysis on the evaluation of the structural differences among three ammonia oxidizing bacteria (AOB) two-pathway models in combination with two heterotrophic denitrification models. The analysis will be performed based on experimental data from a lab-scale deammonification granular sequencing batch reactor operated un…

Shaping inter-firm collaboration in new product development in the automobile industry: A trade-off between a transaction and relational-based approa…

2008

Abstract Shaping collaboration in the new product development (NPD) has always been a very difficult task, especially in complex industries like the automobile one. This complexity is particularly true during the engineering phase of the NPD process, where different complex systems are to be designed in a collaborative way. Basically, two-kind of approaches have been observed in the literature and industry: one is more related to market transactions, specifically the west car-company style, the other is more relational based, as in the Japanese car-company style. Now, the increasing globalisation of the industry asks for a merge of the two approaches; indeed, the increasing use of standard …