Search results for " FS"

Innovativeness as a determinant of entrepreneurial orientation: analysis of the hotel sector

2019

This paper analyses entrepreneurial orientation as a composite formed of innovation, proactiveness and risk-taking. The empirical data for this study were gathered from a survey sent to hotel managers. The fieldwork was carried out between January and June 2018. The process provided 102 valid questionnaires. Two methods were used: structural equation modelling (PLS-SEM) and fuzzy-set qualitative comparative analysis (fsQCA). This study makes six key contributions and findings. First, the use of these two methods provides robust and reliable results. Second, reliability and validity values for innovativeness, proactiveness and risk-taking are satisfactory. Third, the operationalisation of en…

Lo sviluppo sostenibile della pesca nella marineria di Mazara del Vallo

2011

In a place like Sicily, where sea fishing and port activities are part of the territory, history and culture, fishery has always been vital to man and, for this reason, today it must be studied, protected and helped in the difficult transition towards long-term sustainability. Fishing is a driving sector for Mazara economy both for number of working days during the fishing season, and for industrial activities operating around this field (transformation, packaging, and distribution). A micro-economic analysis was carried on a sample of fishing enterprises in order to analyze the problems of the here studied seamanship. The analysis is based on the employers’ interviews. The collected data h…

On the FSW of AA2024-T4 and AA7075-T6 T-joints: an industrial case study

2009

In this paper, the authors present the results of a wide experimental campaign on aeronautical T-shaped parts of industrial interest characterized by dissimilar materials for the skin and stringer. The friction stir welding process engineering was developed with the aim to determine the specific process parameters determining the soundness on the obtained T-parts both from the metallurgical and mechanical point of view. Furthermore, the performance of the obtained T-joints was investigated.

Application of a rheological Model for Phase Transformation Prediction in Beta Processing of Titanium Alloys

2013

The paper shows a description of a numerical model able to simulate a complete forming process of Ti-6Al-4V titanium alloy that is a multi-phasic alloy composed, at room temperature, by two main different phases, namely Alpha and Beta, which evolve during both cooling and heating processes. The characterization of the material behavior concerns both the thermo-mechanical and metallurgical data in order to set a valid tri-coupled thermo-mechanical-metallurgical analysis systems taking into account the effects and interactions of all the phenomena resulting from the coupling of thermal, mechanical and metallurgical events. The numerical model was used to simulate a double numerical campaign r…

Comparison between FSW and bonded lap joints - A preliminary investigation

2017

Difficult to weld aluminium alloys can be effectively joined by different alternative processes. Friction Stir Welding (FSW), among the solid-state processes and adhesive bonding represent two very attractive techniques. They allow the production of highly resistant joints avoiding the formation of the typical fusion weld defects. The aim of this work is to identify, analyse and compare the mechanical properties of AA6016 aluminium alloy joints made out of 1 mm thick sheets. FSW lap joints were and epoxy bonded joints were produced. Using the FSW results as benchmark, the overlap required in the bonded joint was identified to ensure the same static strength. Once the geometric configuration…

Friction Stir Welding e Friction Stir Knead Welding per la realizzazione di giunti misti acciaio-alluminio

2008

Friction Stir Processing: thermo-mechanical loads and consequent effects on the local material characteristics

2008

The present article is focused on the correlation between the applied thermal and mechanical loads and the consequent effects on the material in friction stir processing (FSP) operations. On one hand, the actions exerted in FSP are split compared to the results obtained with a tool without the pin at its end to a traditional one with a cylindrical pin. In this way, the thermal flux determined by the frictional forces at the tool—shoulder—workpiece interface is secluded from the mechanical stirring action made by the tool pin. On the other hand, the processed specimens are analysed in terms of residual stress state, microhardness, and average grain size values. An in-process heat treatment …

Friction based solid state welding processes

2012

The determinants of stakeholder engagement in digital platforms

2018

Abstract Consumer engagement has been heralded as strategic in facilitating sales growth, competitive advantage, and profitability. Expanding the notion of consumer engagement to the stakeholder context, this study examines the determinants of multi-stakeholder digital engagement. Based on a digital setting (Expo2015), this study collected all the social media posts (n = 984) in the Facebook page with restricted access to the stakeholders involved in the event. Initial regression results suggest that the presence of transformation, in terms of activation of creative resource integration in posts, is a strong predictor of compliant and interactive engagement. Fuzzy-set qualitative comparativ…

Preliminary experience with a transcranial magnetic resonance-guided focused ultrasound surgery system integrated with a 1.5-T MRI unit in a series o…

2018

OBJECTIVETranscranial magnetic resonance–guided focused ultrasound surgery (tcMRgFUS) is one of the emerging noninvasive technologies for the treatment of neurological disorders such as essential tremor (ET), idiopathic asymmetrical tremor-dominant Parkinson’s disease (PD), and neuropathic pain. In this clinical series the authors present the preliminary results achieved with the world’s first tcMRgFUS system integrated with a 1.5-T MRI unit.METHODSThe authors describe the results of tcMRgFUS in a sample of patients with ET and with PD who underwent the procedure during the period from January 2015 to September 2017. A monolateral ventralis intermedius nucleus (VIM) thalamic ablation was pe…