MIT's interferometer CST testbed

The MIT Space Engineering Research Center (SERC) has developed a controlled structures technology (CST) testbed based on one design for a space-based optical interferometer. The role of the testbed is to provide a versatile platform for experimental investigation and discovery of CST approaches. In particular, it will serve as the focus for experimental verification of CSI methodologies and control strategies at SERC. The testbed program has an emphasis on experimental CST--incorporating a broad suite of actuators and sensors, active struts, system identification, passive damping, active mirror mounts, and precision component characterization. The SERC testbed represents a one-tenth scaled version of an optical interferometer concept based on an inherently rigid tetrahedral configuration with collecting apertures on one face. The testbed consists of six 3.5 meter long truss legs joined at four vertices and is suspended with attachment points at three vertices. Each aluminum leg has a 0.2 m by 0.2 m by 0.25 m triangular cross-section. The structure has a first flexible mode at 31 Hz and has over 50 global modes below 200 Hz. The stiff tetrahedral design differs from similar testbeds (such as the JPL Phase B) in that the structural topology is closed. The tetrahedral design minimizes structural deflections at the vertices (site of optical components for maximum baseline) resulting in reduced stroke requirements for isolation and pointing of optics. Typical total light path length stability goals are on the order of lambda/20, with a wavelength of light, lambda, of roughly 500 nanometers. It is expected that active structural control will be necessary to achieve this goal in the presence of disturbances

Passive Micromixers

Micro-total analysis systems and lab-on-a-chip platforms are widely used for sample preparation and analysis, drug delivery, and biological and chemical syntheses. A micromixer is an important component in these applications. Rapid and efficient mixing is a challenging task in the design and development of micromixers. The flow in micromixers is laminar, and, thus, the mixing is primarily dominated by diffusion. Recently, diverse techniques have been developed to promote mixing by enlarging the interfacial area between the fluids or by increasing the residential time of fluids in the micromixer. Based on their mixing mechanism, micromixers are classified into two types: active and passive. Passive micromixers are easy to fabricate and generally use geometry modification to cause chaotic advection or lamination to promote the mixing of the fluid samples, unlike active micromixers, which use moving parts or some external agitation/energy for the mixing. Many researchers have studied various geometries to design efficient passive micromixers. Recently, numerical optimization techniques based on computational fluid dynamic analysis have been proven to be efficient tools in the design of micromixers. The current Special Issue covers new mechanisms, design, numerical and/or experimental mixing analysis, and design optimization of various passive micromixers

Marine Proteins and Peptides

Marine proteins and peptides have great potential application in developing pharmaceuticals, nutraceuticals, and cosmeceuticals. Proteins and peptides from marine sources are considered to be safe and inexpensive. Protein- and peptide-based drugs have been increasing in recent days to cure various diseases by serving multiple roles, such as antioxidants, anticancer drugs, antimicrobials, and anticoagulants. There are different marine sources (macroalgae, fish, shellfish, and bivalves), which possibly contain specific protein and peptides

Web 2.0 Tools in a “Flipped” Classroom: Meeting the Needs of Diverse Learners

Web 2.0 Tools in a “Flipped” Classroom: Meeting the Needs of Diverse Learners Classrooms today are more diverse than ever. Today’s youth have a wide range of interests with various levels of readiness and learning styles. Teachers struggle to meet the needs of all of their students. This presentation includes strategic and exemplary technology strategies directed at a diverse student population. It also emphasizes collaborative learning, goal-setting, and decision-making skills within a technologically-rich context. This interactive session will offer technology formats and introduce the concept of a “flipped classroom.” Handouts will be offered and we invite questions and conversation from participants regarding our work and experiences. Target audiences of this presentation include elementary teachers, teacher educators, technology specialists, and instructional designers. Hand-outs will be offered. Participants are encouraged to ask questions and dialogue with the presenters

Molecular dynamics of flows in the Knudsen regime

Novel technological applications often involve fluid flows in the Knudsen regime in which the mean free path is comparable to the system size. We use molecular dynamics simulations to study the transition between the dilute gas and the dense fluid regimes as the fluid density is increased.Comment: REVTeX, 15 pages, 4 EPS figures, to appear in Physica

BlogForever D3.3: Development of the Digital Rights Management Policy

This report presents a set of recommended practices and approaches that a future BlogForever repository can use to develop a digital rights management policy. The report outlines core legal aspects of digital rights that might need consideration in developing policies, and what the challenges are, in particular, in relation to web archives and blog archives. These issues are discussed in the context of the digital information life cycle and steps that might be taken within the workflow of the BlogForever platform to facilitate the gathering and management of digital rights information. Further, the reports on interviews with experts in the field highlight current perspectives on rights management and provide empirical support for the recommendations that have been put forward

Affordable Housing Need in Scotland, Final Report - September 2015

First paragraph: This report presents the findings from research conducted in 2015 which sought to estimate the need for affordable housing across Scotland as a whole. The research was commissioned by Shelter Scotland, the Chartered Institute of Housing Scotland and the Scottish Federation of Housing Associations (SFHA). The study updates a previous, similar exercise conducted almost a decade ago for the Scottish Government (Bramley et al., 2006)

The Role of Social Media and Social Networking as Marketing Delivery Systems for Preventive Health Care Information

The use of social media and social networking (SM&N) is prevalent in health care. Through social media, individuals can access information to enhance their overall health and well-being. Given that prevention is crucial to a long healthy life, as well as restraining escalating health care costs, this study offers insights into the types of social media and networking platforms that health care consumers consider most important, especially with regard to obtaining Preventive Health Care Information (PHCI). Further, it goes on to identify the demographics of persons who consider social media and social networking platforms as most important. This research used an online survey that yielded a sample of 930, whose demographics were comparable to the U.S. population. The results indicated the most important SM&N platforms were traditional digital sources such as WebMD, Wiki’s, and internet search browsers such as Google. Also, prestigious hospitals, such as John Hopkins, MD Anderson, Cleveland Clinic and public health websites were important delivery systems for PHCI. Lastly, social media platforms like Facebook are increasing in importance, while YouTube is used more often by health consumers. Demographically SM&N was most important for (1) those whose employers offered health promotion or wellness programs, (2) those employed part-time, (3) younger health consumers mostly in the 19-24 age group, (4) African-Americans, and (5) single people who have never been married. The next generation of health consumers are expected to make greater use of SM&N platforms to secure their PHCI

Verification Services and Financial Reporting Quality: Assessing the Potential of Review Procedures

Are financial statement reviews, which are limited to primarily analytical procedures and inquiries, a cost-effective verification service for some firms? The answer is important for owner/managers considering reviews as well as investor/lenders, regulators, and those interested in effective verification mechanism design. Using data from U.S. private companies choosing to have financial statements compiled, reviewed, or audited, we calculate four model-based financial reporting quality proxies and, to reflect broader economics, the cost of debt and verification fee estimates. Consistent with application of prescribed verification procedures, we find both reviews and audits yield significantly better reporting quality scores and lower cost of debt than zero-verification compilations. However, model-based reporting quality scores of reviews and audits are indistinguishable statistically, on average. Regarding broader economics, we find that relative to compilations, reviews yield more than half the added interest rate benefit associated with an audit, at considerably less than half the added cost. Overall, our results suggest reviews may provide a cost-effective verification alternative to audits, and the potential of analytical procedures warrants more attention by audit researchers and regulators

BlogForever: D3.1 Preservation Strategy Report

This report describes preservation planning approaches and strategies recommended by the BlogForever project as a core component of a weblog repository design. More specifically, we start by discussing why we would want to preserve weblogs in the first place and what it is exactly that we are trying to preserve. We further present a review of past and present work and highlight why current practices in web archiving do not address the needs of weblog preservation adequately. We make three distinctive contributions in this volume: a) we propose transferable practical workflows for applying a combination of established metadata and repository standards in developing a weblog repository, b) we provide an automated approach to identifying significant properties of weblog content that uses the notion of communities and how this affects previous strategies, c) we propose a sustainability plan that draws upon community knowledge through innovative repository design