Choosing the right microcontroller: A comparison of 8-bit Atmel, Microchip and Freescale MCUs

When choosing a microcontroller there are many options, so which platform should you choose? There is little independent information available to help engineers decide which platform might best suit their needs and most designers tend to stick with the brand with which they are familiar. This is a difficult question to answer without bias if the people conducting the evaluations have had previous experience with MCU programming predominantly on one platform. This article draws on a case study. We built three “Smart” Sprinkler Taps, small, self-contained irrigation controllers, differing only in the microcontroller unit (MCU) on the inside. We compare cost, development software quality and hardware performance from the perspective of a new user to each of the platforms

Humanitarian Journalists:Covering Crises from a Boundary Zone

This book documents the unique reporting practices of humanitarian journalists – an influential group of journalists defying conventional approaches to covering humanitarian crises. Based on a 5-year study, involving over 150 in-depth interviews, this book examines the political, economic and social forces that sustain and influence humanitarian journalists. The authors argue that – by amplifying marginalised voices and providing critical, in-depth explanations of neglected crises – these journalists show us that another kind of humanitarian journalism is possible. However, the authors also reveal the heavy price these reporters pay for deviating from conventional journalistic norms. Their peripheral position at the ‘boundary zone’ between the journalistic and humanitarian fields means that a humanitarian journalist’s job is often precarious – with direct implications for their work, especially as ‘watchdogs’ for the aid sector. As a result, they urgently need more support if they are to continue to do this work and promote more effective and accountable humanitarian action. A rigorous study of how unique professional practices can be produced at the ‘boundary zone’ between fields, this book will interest students and scholars of journalism and communication studies, sociology and humanitarian studies. It will also appeal to those interested in studies of news and media work as occupational identities

Humanitarian Journalists

This book documents the unique reporting practices of humanitarian journalists – an influential group of journalists defying conventional approaches to covering humanitarian crises. Based on a 5-year study, involving over 150 in-depth interviews, this book examines the political, economic and social forces that sustain and influence humanitarian journalists. The authors argue that – by amplifying marginalised voices and providing critical, in-depth explanations of neglected crises – these journalists show us that another kind of humanitarian journalism is possible. However, the authors also reveal the heavy price these reporters pay for deviating from conventional journalistic norms. Their peripheral position at the ‘boundary zone’ between the journalistic and humanitarian fields means that a humanitarian journalist’s job is often precarious – with direct implications for their work, especially as ‘watchdogs’ for the aid sector. As a result, they urgently need more support if they are to continue to do this work and promote more effective and accountable humanitarian action. A rigorous study of how unique professional practices can be produced at the ‘boundary zone’ between fields, this book will interest students and scholars of journalism and communication studies, sociology and humanitarian studies. It will also appeal to those interested in studies of news and media work as occupational identities

Crab pulsar giant pulses: Simultaneous radio and GRO observations

Observations are reported of the Crab pulsar made at radio frequencies concurrent with Oriented Scintillation Spectrometer Experiment (OSSE) observations from 15 to 27 May 1991. Using the 43 m telescope at Green Bank at 0.8 and 1.4 GHz, samples were made continuously for 10 hrs/day at intervals of 100 to 300 microsecs. The analysis of the radio data includes calculation of histograms of pulse intensities, absolute timing to about 20 microsec precision, and characterization of intensity variations on time scales from the 33 ms spin period to days. The most detailed analysis is presented made of giant pulses. The ultimate goal is to bin the radio data into giant and nongiant pulses and to form average waveforms of OSSE data for the corresponding pulse periods. A test is done to see whether the violet radio fluctuations (which are not seen in other radio pulsars to the same degree) are correlated with low energy gamma rays, yielding constraints on the radio coherence mechanism and the steadiness of the electron-positron outflow in the magnetosphere. Timing analysis of the radio data provides a well defined ephemeris over the specified range of epochs. The gamma ray pulse phase was predicted with an error of less than 70 microsecs

Making sense framework and assessment of participatory strategies

This report is a combined effort of Dundee University and the Joint Research Centre, based on the integration of D5.2 (Report and evaluation of the pilot approaches to ‘Making Sense campaigns’) and D4.3 (Report on assessment of participatory methods in the pilots and final recommendations). The document is structured as follows: Section 1 articulates the Making Sense approach to pilots and covers our campaign rationale, stakeholders and summarises the Making Sense pilots; Section 2 describes the design and iteration of the Making Sense Framework; Section 3 shows how the Making Sense Framework has been exemplified through the pilots and describes and illustrates each phase of the Framework with an example from a pilot; Section 4 focuses on ten key topics where we observed how citizen engagement and community building were addressed inside Making Sense and how the project participatory strategies developed from there on; Section 5 puts forward a new augmented version of previously devised recommendations for participatory or community driven sensing projects, with lessons learned from and for Making Sense.JRC.I.2-Foresight, Behavioural Insights and Design for Polic

Soft power, hard news:How journalists at state-funded transnational media legitimize their work

How do journalists working for different state-funded international news organizations legitimize their relationship to the governments which support them? In what circumstances might such journalists resist the diplomatic strategies of their funding states? We address these questions through a comparative study of journalists working for international news organizations funded by the Chinese, US, UK and Qatari governments. Using 52 interviews with journalists covering humanitarian issues, we explain how they minimized tensions between their diplomatic role and dominant norms of journalistic autonomy by drawing on three – broadly shared – legitimizing narratives, involving different kinds of boundary-work. In, the first ‘exclusionary’ narrative, journalists differentiated their ‘truthful’ news reporting from the ‘false’ state ‘propaganda’ of a common Other, the Russian-funded network, RT. In the second ‘fuzzifying’ narrative, journalists deployed the ambiguous notion of ‘soft power’ as an ambivalent ‘boundary concept’, to defuse conflicts between journalistic and diplomatic agendas. In the final ‘inversion’ narrative, journalists argued that, paradoxically, their dependence on funding states gave them greater ‘operational autonomy’. Even when journalists did resist their funding states, this was hidden or partial, and prompted less by journalists’ concerns about the political effects of their work, than by serious threats to their personal cultural capital

Foundation-funded journalism, Philanthrocapitalism and Tainted donors

Not-for-profit news organisations are increasingly funded by private foundations, supported by wealthy entrepreneurs. This raises a range of ethical dilemmas for journalists, which are particularly serious when their donors are alleged to have been involved in unethical or illegal activities. Although this is a relatively common occurrence in the non-profit sector, so far there has been no critical discussion of these issues in relation to foundation-funded journalism. In this article, we interrogate a rich and detailed case study of the relations between a nonprofit news organisation and a donor accused of being involved in a massive, international fraud scandal. We document how the news outlet justified their acceptance of this donor’s money; the defensive strategies they used to protect their reputation, organisational values and editorial freedom; and the conditions that ultimately led to journalists parting ways with the foundation. In so doing, we draw on ideas about philanthrocapitalism, stakeholders and resource dependence in order to develop Dunn’s (2010) model of how nonprofits respond to “tainted” donors

A Bio-Polymer Transistor: Electrical Amplification by Microtubules

Microtubules (MTs) are important cytoskeletal structures, engaged in a number of specific cellular activities, including vesicular traffic, cell cyto-architecture and motility, cell division, and information processing within neuronal processes. MTs have also been implicated in higher neuronal functions, including memory, and the emergence of "consciousness". How MTs handle and process electrical information, however, is heretofore unknown. Here we show new electrodynamic properties of MTs. Isolated, taxol-stabilized microtubules behave as bio-molecular transistors capable of amplifying electrical information. Electrical amplification by MTs can lead to the enhancement of dynamic information, and processivity in neurons can be conceptualized as an "ionic-based" transistor, which may impact among other known functions, neuronal computational capabilities.Comment: This is the final submitted version. The published version should be downloaded from Biophysical Journa

Travelling waves in a model of quasi-active dendrites with active spines

Dendrites, the major components of neurons, have many different types of branching structures and are involved in receiving and integrating thousands of synaptic inputs from other neurons. Dendritic spines with excitable channels can be present in large densities on the dendrites of many cells. The recently proposed Spike-Diffuse-Spike (SDS) model that is described by a system of point hot-spots (with an integrate-and-fire process) embedded throughout a passive tree has been shown to provide a reasonable caricature of a dendritic tree with supra-threshold dynamics. Interestingly, real dendrites equipped with voltage-gated ion channels can exhibit not only supra-threshold responses, but also sub-threshold dynamics. This sub-threshold resonant-like oscillatory behaviour has already been shown to be adequately described by a quasi-active membrane. In this paper we introduce a mathematical model of a branched dendritic tree based upon a generalisation of the SDS model where the active spines are assumed to be distributed along a quasi-active dendritic structure. We demonstrate how solitary and periodic travelling wave solutions can be constructed for both continuous and discrete spine distributions. In both cases the speed of such waves is calculated as a function of system parameters. We also illustrate that the model can be naturally generalised to an arbitrary branched dendritic geometry whilst remaining computationally simple. The spatio-temporal patterns of neuronal activity are shown to be significantly influenced by the properties of the quasi-active membrane. Active (sub- and supra-threshold) properties of dendrites are known to vary considerably among cell types and animal species, and this theoretical framework can be used in studying the combined role of complex dendritic morphologies and active conductances in rich neuronal dynamics

Childhood conscientiousness predicts the social gradient of smoking in adulthood: a life course analysis.

The social gradient in smoking is well known, with higher rates among those in less advantaged socioeconomic position. Some recent research has reported that personality characteristics partly explain this gradient. However, the majority of existing work is limited by cross-sectional designs unsuitable to determine whether differences in conscientiousness are a predictor or a product of social inequalities. Adopting a life course perspective, we investigated in the current paper the influence of conscientiousness in early and mid-life on the social gradient in smoking and the role of potential confounding factors in a large longitudinal cohort study