An Evaluation of Non-Stochastic Lattice Structures Fabricated Via Electron Beam Melting

Metal foam structures have many applications and can be used as structural supports, heat exchangers, shock absorbers, and implant materials. Stochastic metal foams having different cell sizes and densities have been commercially available for a number of years. This paper addresses a different type of foams which are known as non-stochastic foams, or lattice structures. These foams have a well defined repeating unit cell structure rather than the random cell structure in commercially available stochastic foams. The paper reports on preliminary research on the fabrication of non-stochastic Ti-6Al-4V alloy foams using the Electron Beam Melting process. Behavior of the structures in compression, bending, and low cycle repeating load tests are discussed, and recommendations about cell geometry and processing conditions are made.Mechanical Engineerin

Relative Health Effects of Education, Socioeconomic Status and Domestic Gender Inequity in Sweden: A Cohort Study

Introduction: Limited existing research on gender inequities suggests that for men workplace atmosphere shapes wellbeing while women are less susceptible to socioeconomic or work status but vulnerable to home inequities. Methods: Using the 2007 Northern Swedish Cohort (n = 773) we identified relative contributions of perceived gender inequities in relationships, financial strain, and education to self-reported health to determine whether controlling for sex, examining interactions between sex and other social variables, or sex-disaggregating data yielded most information about sex differences. Results and Discussion: Men had lower education but also less financial strain, and experienced less gender inequity. Overall, low education and financial strain detracted from health. However, sex-disaggregated data showed this to be true for women, whereas for men only gender inequity at home affected health. In the relatively egalitarian Swedish environment where women more readily enter all work arenas and men often provide parenting, traditional primacy of the home environment (for women) and the work environment (for men) in shaping health is reversing such that perceived domestic gender inequity has a significant health impact on men, while for women only education and financial strain are contributory. These outcomes were identified only when data were sex-disaggregated

The lysine-rich motif of intrinsically disordered stress protein CDeT11-24 from Craterostigma plantagineum is responsible for phosphatidic acid binding and protection of enzymes from damaging effects caused by desiccation

The late embryogenesis abundant (LEA)-like protein CDeT11-24 is one of the major desiccation-related phosphoproteins of the resurrection plant Craterostigma plantagineum. In this study, it was shown that CDeT11-24 is mostly intrinsically disordered and protects two different enzymes, citrate synthase and lactate dehydrogenase, against damaging effects caused by desiccation. Lipid-binding assays revealed that CDeT11-24 is able to interact with phosphatidic acid, although electrostatic repulsion was expected due to the overall negative net charge of the protein under the tested physiological conditions. CDeT11-24 carries an N-terminal lysine-rich sequence, which is predicted to form an amphipathic α-helix. Analysis of the truncated CDeT11-24 protein identified this region to be responsible for both activities: enzyme protection and phosphatidic acid interaction. Possible functions of the CDeT11-24 protein are discussed in the context of desiccation tolerance. Abbreviations: ABA: abscisic acid; CD: circular dichroism; CS: citrate synthase; IDP: intrinsically disordered protein; LDH: lactate dehydrogenase; LEA: late embryogenesis abundant; PA: phosphatidic acid; PC: phosphatidylcholine; TFE: trifluoroethanol

Entrepreneurship through relationships - navigating from creativity to commercialisation

This paper explores the role of relationships in the emergence of a network's value creation structure. The strategic navigation from creative exploration to global exploitation through the use of so-called transformation networks is particularly highlighted. The creativity phase requires a creator with visionary leadership. The commercialisation phase, on the other hand, requires technology integration and global marketing excellence. Realising that this requires more than a bright inventor, the creator of Anoto brought in the right complementary assets at distinct phases of the commercialisation process. Our case illustrates how integrator and marketeer profiles were brought into a networked act of entrepreneurship for joint navigation across an ocean of relationships that gave birth to a global standard for digital writing. By combining theories on open innovation and networking, a theoretical framework is developed to analyse the different nature of the networks (or the value creation structure) in which complementary assets can be accessed, transferred and transformed into commercialised innovation. The analysis suggests that the value of complementary assets are embedded in and unlocked by three distinct types of networks: creativity networks, transformation networks and process networks. It also suggests that the ideal approach to accessing complementary assets shifts over the research and development management process, and happens through these three different types and levels of networks, requiring fundamentally different approaches to leadership and relationship management. Current literature describes open and networked innovation as a continuous - not dynamic - process of exploration and exploitation without any distinction of how types and structures of networks evolve and interact in the process

Transformation Networks in Innovation Alliances - The Development of Volvo C70

This paper addresses an important gap in the literature intersection between network theory and networked innovation by developing a theoretical framework on how to leverage learning alliances across extra- and intra-corporate levels to support both exploration and exploitation of innovation to secure its creation "and" its implementation. A detailed case of the Volvo C70 development is analysed with focus on how the full innovation from exploration to exploitation of innovation seem to rely on fundamentally different types and structures of networks. Our detailed description and analysis of how a 'transformation network' was established and operated across different organizational levels to secure not only transfer, but also transformation and integration of knowledge into commercialized innovation makes an important contribution to extant theory on inter-organizational knowledge transfer and networking. Copyright (c) Blackwell Publishing Ltd 2008.