Abderrahmane Baïri, Clara Ortega Hermoso, David San Martén Ortega, Iken Baïri and Zsolt Peter
This work deals with the case of the quad flat non-lead 64 (QFN64) electronic package generating a low power range ranging from 0.01 to 0.1W. It is installed on one side of a…
Abstract
Purpose
This work deals with the case of the quad flat non-lead 64 (QFN64) electronic package generating a low power range ranging from 0.01 to 0.1W. It is installed on one side of a printed circuit board (PCB) that can be inclined relative to the horizontal plane with an angle varying between 0° and 90° (horizontal and vertical positions, respectively). The surface temperature of the electronic assembly is subjected to air natural convection.
Design/methodology/approach
Calculations are done by means of the finite volume method for many configurations obtained by varying the generated power and the inclination angle.
Findings
The distribution of the surface temperature is determined on all the assembly areas (QFN and PCB). The study shows that the thermal behaviour of the electronic device is influenced by the generated power and the inclination angle. The 3D numerical survey leads to correlations allowing calculation of the average surface temperature in any part of the assembly, according to the power generated by the QFN64 and the inclination angle.
Originality/value
The proposed accurate correlations are original and unpublished. They optimize the thermal design of the electronic QFN64 package, which is increasingly used in many engineering fields.
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Lake Sagaris and Ignacio Tiznado-Aitken
Sustainable transport is often defined according to energy efficiency and environmental impacts. With global approval during Habitat III, however, a set of Sustainable Development…
Abstract
Sustainable transport is often defined according to energy efficiency and environmental impacts. With global approval during Habitat III, however, a set of Sustainable Development Goals have become the focus for human development until 2030, underlining the relevance of health, equity and other social issues.
These goals raise the challenge of achieving significant progress towards ‘transport justice’ in diverse societies and contexts. While exclusion occurs for different reasons, discrimination, based on cultural roles, combines with sexual harassment and other mobility barriers to limit women’s mobility. This makes gender an area of particular interest and potential insight for considering equity within sustainability and its social components.
Using data from Metropolitan Santiago to ground a conceptual exploration, this chapter examines the equity implications of women’s travel patterns and sustainable transport. Key findings underline the importance of considering non-work trip purposes and achieving better land-use combinations to accommodate care-oriented trips. Moreover, barriers linked to unsafe public transport environments limit women’s mobility and, therefore, their participation. Women account for a disproportionately high number of walking trips, a situation that can be interpreted as ‘greater sustainability’ in terms of energy use and emissions, but suggests significant inequalities in access. Environmental and economic sustainability gains may be achieved at a high social cost, unless specific measures are taken.
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Yuliya Snihur, Llewellyn D. W. Thomas and Robert A. Burgelman
Despite increasing interest in business model innovation (BMI), there is only limited scholarship that examines how business model (BM) innovators present and explain their…
Abstract
Despite increasing interest in business model innovation (BMI), there is only limited scholarship that examines how business model (BM) innovators present and explain their innovations to various stakeholders. As BMI often involves the creation of a new ecosystem, understanding how innovators can gain support of future ecosystem members is important. Based on a longitudinal case study of Salesforce, a pioneer in cloud computing, the authors show how the innovator’s skillful framing to different audiences fosters the emergence of an ecosystem around the new BM. The authors suggest that effective framing constitutes an important strategic process that enables BM innovators to shape new ecosystems due to the performative power of words.