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actor network theory or actor-network

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https://www.readbyqxmd.com/read/28429970/taking-data-seriously-the-value-of-actor-network-theory-in-rethinking-patient-experience-data
#1
Amit Desai, Giulia Zoccatelli, Mary Adams, Davina Allen, Sally Brearley, Anne Marie Rafferty, Glenn Robert, Sara Donetto
Hospitals are awash with patient experience data, much of it collected with the ostensible purpose of improving the quality of patient care. However, there has been comparatively little consideration of the nature and capacities of data itself. Using insights from actor-network theory, we propose that paying attention to patient experience data as having agency in particular hospital interactions allows us to better trace how and in what circumstances data lead (or fail to lead) to quality improvement.
April 2017: Journal of Health Services Research & Policy
https://www.readbyqxmd.com/read/28428164/zika-in-twitter-temporal-variations-of-locations-actors-and-concepts
#2
Anthony Stefanidis, Emily Vraga, Georgios Lamprianidis, Jacek Radzikowski, Paul L Delamater, Kathryn H Jacobsen, Dieter Pfoser, Arie Croitoru, Andrew Crooks
BACKGROUND: The recent Zika outbreak witnessed the disease evolving from a regional health concern to a global epidemic. During this process, different communities across the globe became involved in Twitter, discussing the disease and key issues associated with it. This paper presents a study of this discussion in Twitter, at the nexus of location, actors, and concepts. OBJECTIVE: Our objective in this study was to demonstrate the significance of 3 types of events: location related, actor related, and concept related, for understanding how a public health emergency of international concern plays out in social media, and Twitter in particular...
April 20, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28424679/linking-diet-to-colorectal-cancer-the-emerging-role-of-microrna-in-the-communication-between-plant-and-animal-kingdoms
#3
REVIEW
Manuela Del Cornò, Gloria Donninelli, Lucia Conti, Sandra Gessani
Environmental and lifestyle factors, including diet and nutritional habits have been strongly linked to colorectal cancer (CRC). Of note, unhealthy dietary habits leading to adiposity represent a main risk factor for CRC and are associated with a chronic low-grade inflammatory status. Inflammation is a hallmark of almost every type of cancer and can be modulated by several food compounds exhibiting either protective or promoting effects. However, in spite of an extensive research, the underlying mechanisms by which dietary patterns or bioactive food components may influence tumor onset and outcome have not been fully clarified yet...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28420102/efficient-actor-recovery-paradigm-for-wireless-sensor-and-actor-networks
#4
Reem K Mahjoub, Khaled Elleithy
The actor nodes are the spine of wireless sensor and actor networks (WSANs) that collaborate to perform a specific task in an unverified and uneven environment. Thus, there is a possibility of high failure rate in such unfriendly scenarios due to several factors such as power consumption of devices, electronic circuit failure, software errors in nodes or physical impairment of the actor nodes and inter-actor connectivity problem. Therefore, it is extremely important to discover the failure of a cut-vertex actor and network-disjoint in order to improve the Quality-of-Service (QoS)...
April 14, 2017: Sensors
https://www.readbyqxmd.com/read/28399145/a-systematic-identification-and-analysis-of-scientists-on-twitter
#5
Qing Ke, Yong-Yeol Ahn, Cassidy R Sugimoto
Metrics derived from Twitter and other social media-often referred to as altmetrics-are increasingly used to estimate the broader social impacts of scholarship. Such efforts, however, may produce highly misleading results, as the entities that participate in conversations about science on these platforms are largely unknown. For instance, if altmetric activities are generated mainly by scientists, does it really capture broader social impacts of science? Here we present a systematic approach to identifying and analyzing scientists on Twitter...
2017: PloS One
https://www.readbyqxmd.com/read/28390418/joining-the-dots-the-role-of-brokers-in-nutrition-policy-in-australia
#6
Katherine Cullerton, Timothy Donnet, Amanda Lee, Danielle Gallegos
BACKGROUND: Poor diet is the leading preventable risk factor contributing to the burden of disease in Australia. A range of cost-effective, comprehensive population-focussed strategies are available to address these dietary-related diseases. However, despite evidence of their effectiveness, minimal federal resources are directed to this area. To better understand the limited public health nutrition policy action in Australia, we sought to identify the key policy brokers in the Australian nutrition policy network and consider their level of influence over nutrition policymaking...
April 8, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28380169/-responsible-research-and-development-translating-absences-from-nanotechnology-in-portugal
#7
Paulo F C Fonseca, Tiago Santos Pereira
This article analyzes how responsible innovation has been discussed and implemented in the context of one of the Portuguese government's main activities to foster nanotechnology. Through the actor-network theory and the sociology of absences, we investigate the process of coproduction at the International Iberian Nanotechnology Laboratory to identify how concerns about responsible development have been implemented or ignored in the rules and practices. The institute emerged from a sociotechnical imagination that views it as an autonomous unit for producing technological innovations aimed exclusively at increasing competitiveness in a global market, which has been an obstacle to the materialization of robust responsible development practices...
January 2017: História, Ciências, Saúde—Manguinhos
https://www.readbyqxmd.com/read/28362620/finite-horizon-h%C3%A2-tracking-control-for-unknown-nonlinear-systems-with-saturating-actuators
#8
Huaguang Zhang, Xiaohong Cui, Yanhong Luo, He Jiang
In this paper, a neural network (NN)-based online model-free integral reinforcement learning algorithm is developed to solve the finite-horizon H∞ optimal tracking control problem for completely unknown nonlinear continuous-time systems with disturbance and saturating actuators (constrained control input). An augmented system is constructed with the tracking error system and the command generator system. A time-varying Hamilton-Jacobi-Isaacs (HJI) equation is formulated for the augmented problem, which is extremely difficult or impossible to solve due to its time-dependent property and nonlinearity...
March 1, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28362616/neural-network-based-robust-optimal-tracking-control-for-mimo-discrete-time-systems-with-unknown-uncertainty-using-adaptive-critic-design
#9
Lei Liu, Zhanshan Wang, Huaguang Zhang
This paper is concerned with the robust optimal tracking control strategy for a class of nonlinear multi-input multi-output discrete-time systems with unknown uncertainty via adaptive critic design (ACD) scheme. The main purpose is to establish an adaptive actor-critic control method, so that the cost function in the procedure of dealing with uncertainty is minimum and the closed-loop system is stable. Based on the neural network approximator, an action network is applied to generate the optimal control signal and a critic network is used to approximate the cost function, respectively...
March 2, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28361198/peer-influence-peer-selection-and-adolescent-alcohol-use-a-simulation-study-using-a-dynamic-network-model-of-friendship-ties-and-alcohol-use
#10
Cheng Wang, John R Hipp, Carter T Butts, Rupa Jose, Cynthia M Lakon
While studies suggest that peer influence can in some cases encourage adolescent substance use, recent work demonstrates that peer influence may be on average protective for cigarette smoking, raising questions about whether this effect occurs for other substance use behaviors. Herein, we focus on adolescent drinking, which may follow different social dynamics than smoking. We use a data-calibrated Stochastic Actor-Based (SAB) Model of adolescent friendship tie choice and drinking behavior to explore the impact of manipulating the size of peer influence and selection effects on drinking in two school-based networks...
March 30, 2017: Prevention Science: the Official Journal of the Society for Prevention Research
https://www.readbyqxmd.com/read/28336800/the-ethics-of-big-data-as-a-public-good-which-public-whose-good
#11
Linnet Taylor
International development and humanitarian organizations are increasingly calling for digital data to be treated as a public good because of its value in supplementing scarce national statistics and informing interventions, including in emergencies. In response to this claim, a 'responsible data' movement has evolved to discuss guidelines and frameworks that will establish ethical principles for data sharing. However, this movement is not gaining traction with those who hold the highest-value data, particularly mobile network operators who are proving reluctant to make data collected in low- and middle-income countries accessible through intermediaries...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28336792/data-philanthropy-and-the-design-of-the-infraethics-for-information-societies
#12
Mariarosaria Taddeo
In mature information societies, sharing data is increasingly recognized as a crucial means to foster their development. However, competing tensions on data control and ownership, limited technical understanding, and the lack of an adequate governance framework pose serious challenges to attempts to share data among different actors. Data philanthropy, understood as the donation of data from both individuals and private companies, has been proposed as means to meet these challenges. While at first sight data philanthropy may seem an uncontroversial phenomenon, a closer analysis reveals a bewildering network of problems...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28334748/the-shifting-dynamics-of-social-roles-and-project-ownership-over-the-lifecycle-of-a-community-based-participatory-research-project
#13
Jon Salsberg, Soultana Macridis, Enrique Garcia Bengoechea, Ann C Macaulay, Spencer Moore
Background: . Community based participatory research (CBPR) is often initiated by academic researchers, yet relies on meaningful community engagement and ownership to have lasting impact. Little is understood about how ownership shifts from academic to community partners. Objectives: . We examined a CBPR project over its life course and asked: what does the evolution of ownership look like from project initiation by an academic (non-community) champion (T1); to maturation-when the intervention is ready to be deployed (T2); to independence-the time when the original champion steps aside (T3); and finally, to its maintenance-when the community has had an opportunity to function independently of the original academic champion (T4)? Methods: ...
February 21, 2017: Family Practice
https://www.readbyqxmd.com/read/28327150/research-impact-of-systems-level-long-term-care-research-a-multiple-case-study
#14
Anita Kothari, Nedra Peter, Melissa Donskov, Tracy Luciani
BACKGROUND: Traditional reporting of research outcomes and impacts, which tends to focus on research product publications and grant success, does not capture the value, some contributions, or the complexity of research projects. The purpose of this study was to understand the contributions of five systems-level research projects as they were unfolding at the Bruyère Centre for Learning, Research and Innovation (CLRI) in long-term care (LTC) in Ottawa, Ontario, Canada. The research questions were, (1) How are partnerships with research end-users (policymakers, administrators and other public/private organisations) characterised? (2) How have interactions with the CLRI Management Committee and Steering Committee influenced the development of research products? (3) In what way have other activities, processes, unlinked actors or organisations been influenced by the research project activities? METHODS: The study was guided by Kok and Schuit's concept of research impacts, using a multiple case study design...
March 21, 2017: Health Research Policy and Systems
https://www.readbyqxmd.com/read/28326307/p75-neurotrophin-receptor-in-the-skin-beyond-its-neurotrophic-function
#15
REVIEW
Carlo Pincelli
p75 neurotrophin receptor (p75(NTR)), also known as CD271, is the low-affinity receptor that, together with the tyrosine kinase receptor tropomyosin-receptor kinase (Trk), mediate neurotrophin (NT) functions. Beside their classic role in skin innervation, NT and their receptors constitute a complex cutaneous network associated with a number of autocrine and paracrine activities. In this context, the role of p75(NTR) is becoming more and more important. This review will focus on the intriguing functions of p75(NTR) in healthy and diseased skin...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28298209/implementation-of-evidence-informed-practice-through-central-network-actors-a-case-study-of-three-public-health-units-in-canada
#16
Reza Yousefi Nooraie, Alexandra Marin, Robert Hanneman, Lynne Lohfeld, Maureen Dobbins
BACKGROUND: Workforce development is an important aspect of evidence-informed decision making (EIDM) interventions. The social position of individuals in formal and informal social networks, and the relevance of formal roles in relation to EIDM are important factors identifying key EIDM players in public health organizations. We assessed the role of central actors in information sharing networks in promoting the adoption of EIDM by the staff of three public health units in Canada, over a two-year period during which an organization-wide intervention was implemented...
March 15, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28289044/exploiting-social-influence-to-magnify-population-level-behaviour-change-in-maternal-and-child-health-study-protocol-for-a-randomised-controlled-trial-of-network-targeting-algorithms-in-rural-honduras
#17
Holly B Shakya, Derek Stafford, D Alex Hughes, Thomas Keegan, Rennie Negron, Jai Broome, Mark McKnight, Liza Nicoll, Jennifer Nelson, Emma Iriarte, Maria Ordonez, Edo Airoldi, James H Fowler, Nicholas A Christakis
INTRODUCTION: Despite global progress on many measures of child health, rates of neonatal mortality remain high in the developing world. Evidence suggests that substantial improvements can be achieved with simple, low-cost interventions within family and community settings, particularly those designed to change knowledge and behaviour at the community level. Using social network analysis to identify structurally influential community members and then targeting them for intervention shows promise for the implementation of sustainable community-wide behaviour change...
March 13, 2017: BMJ Open
https://www.readbyqxmd.com/read/28277703/network-behavior-dynamics-of-adolescent-friendships-alcohol-use-and-physical-activity
#18
Emily Long, Tyson S Barrett, Ginger Lockhart
OBJECTIVE: The coevolution of adolescent social networks, alcohol use, and physical activity is studied. Previous research has independently evaluated each behavior, overlooking the potential power of examining their development within a shared social context. The current study extends previous research by examining the dynamics of friendship networks, alcohol use, and physical activity in conjunction, including the concurrent engagement in both behaviors, with a nationally representative sample of U...
March 9, 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28275850/analysis-of-swedish-forest-owners-information-and-knowledge-sharing-networks-for-decision-making-insights-for-climate-change-communication-and-adaptation
#19
Karin André, Julia Baird, Åsa Gerger Swartling, Gregor Vulturius, Ryan Plummer
To further the understanding of climate change adaptation processes, more attention needs to be paid to the various contextual factors that shape whether and how climate-related knowledge and information is received and acted upon by actors involved. This study sets out to examine the characteristics of forest owners' in Sweden, the information and knowledge-sharing networks they draw upon for decision-making, and their perceptions of climate risks, their forests' resilience, the need for adaptation, and perceived adaptive capacity...
March 8, 2017: Environmental Management
https://www.readbyqxmd.com/read/28254507/primary-somatosensory-cortex-necessary-for-the-perception-of-weight-from-other-people-s-action-a-continuous-theta-burst-tms-experiment
#20
Nikola Valchev, Emmanuele Tidoni, Antonia F de C Hamilton, Valeria Gazzola, Alessio Avenanti
The presence of a network of areas in the parietal and premotor cortices, which are active both during action execution and observation, suggests that we might understand the actions of other people by activating those motor programs for making similar actions. Although neurophysiological and imaging studies show an involvement of the somatosensory cortex (SI) during action observation and execution, it is unclear whether SI is essential for understanding the somatosensory aspects of observed actions. To address this issue, we used off-line transcranial magnetic continuous theta-burst stimulation (cTBS) just before a weight judgment task...
February 28, 2017: NeuroImage
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