Abstract
The university-enterprise (U-E) relationship is a topic that has gathered much interest in the academic world. Universities seek to offer services and technology that help firms to build and foster a harmonious U-E relationship, allowing firms to continually renew their involvement in the relationship. This chapter seeks to analyze the role played by various factors-satisfaction, commitment as perceived by firms, perceived commitment by universities, trust, and reputation-in encouraging firms to continuously renew their involvement in the university relationship. A questionnaire was produced drawing on a literature review looking at U-E relationships, the results of which were then analyzed using partial least squares - structural equation modelling (PLS-SEM). Afyer analyzing 80 responses from firms involved in U-E relationships, it was possible to conclude that commitment of firms, reputation, and the perceived commitment of the universities are very important in the continuous participation of firms in U-E relationships. © 2018, IGI Global.

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Abstract
The irregular strip packing problem consists of cutting a set of convex and non-convex two-dimensional polygonal pieces from a board with a fixed height and infinite length. Owing to the importance of this problem, a large number of mathematical models and solution methods have been proposed. However, only few papers consider that the pieces can be rotated at any angle in order to reduce the board length used. Furthermore, the solution methods proposed in the literature are mostly heuristic. This paper proposes a novel mixed integer quadratically-constrained programming model for the irregular strip packing problem considering continuous rotations for the pieces. In the model, the pieces are allocated on the board using a reference point and its allocation is given by the translation and rotation of the pieces. To reduce the number of symmetric solutions for the model, sets of symmetry-breaking constraints are proposed. Computational experiments were performed on the model with and without symmetry-breaking constraints, showing that symmetry elimination improves the quality of solutions found by the solution methods. Tests were performed with instances from the literature. For two instances, it was possible to compare the solutions with a previous model from the literature and show that the proposed model is able to obtain numerically accurate solutions in competitive computational times.

Abstract

Abstract
Purpose The purpose of this study is to determine whether new rural ventures represent effective rural entrepreneurship or are just entrepreneurial ventures located in rural settings. Design\methodology\approach Data were collected from a direct questionnaire involving 408 new ventures headquartered in Portuguese business incubators and science parks, of which 142 are located in rural areas. To analyse data, the authors performed a preliminary and exploratory statistical analysis. Findings The authors demonstrate that only a small percentage of ventures operating in rural areas constitute examples of effective rural entrepreneurship, with the bulk of them being just enterprises located in rural settings. Rural new ventures tend to be small (in terms of employees and turnover), rely mainly on the internal market and lag behind other new ventures (located in both rural and urban municipalities) in terms of performance. Research limitations/implications The study only includes new knowledge-intensive ventures, that is, those headquartered in business incubators and science parks. Therefore, it cannot be generalised to other new ventures located in rural settings. Originality/value The extant literature on entrepreneurship has neglected the empirical implications of mixing, confounding and/or merging the concepts of rural entrepreneurship and entrepreneurship activities in rural areas. In this study, the authors discuss and analyse the empirical boundaries of such concepts and uncover the magnitude of pure rural entrepreneurship.