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actor network theory or actor-network

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https://www.readbyqxmd.com/read/28527377/fishing-for-leadership-the-role-diversification-plays-in-facilitating-change-agents
#1
Joshua S Stoll
Leadership is often viewed as being critical to successful natural resource management. This research focuses on a set of leaders identified through a social network analysis of fishers in a rural coastal region. Leaders' connections to different fisheries are evaluated, and these actors are found to be significantly more diversified than other fishers in the area. Drawing on theory related to institutional entrepreneurship and a series of in-depth interviews with these actors, this paper puts forward several hypotheses to explain how diverse social-ecological connections facilitate leadership...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28486475/a-simulated-annealing-heuristic-for-maximum-correlation-core-periphery-partitioning-of-binary-networks
#2
Michael Brusco, Hannah J Stolze, Michaela Hoffman, Douglas Steinley
A popular objective criterion for partitioning a set of actors into core and periphery subsets is the maximization of the correlation between an ideal and observed structure associated with intra-core and intra-periphery ties. The resulting optimization problem has commonly been tackled using heuristic procedures such as relocation algorithms, genetic algorithms, and simulated annealing. In this paper, we present a computationally efficient simulated annealing algorithm for maximum correlation core/periphery partitioning of binary networks...
2017: PloS One
https://www.readbyqxmd.com/read/28466752/what-makes-a-robot-social
#3
Raya A Jones
Rhetorical moves that construct humanoid robots as social agents disclose tensions at the intersection of science and technology studies (STS) and social robotics. The discourse of robotics often constructs robots that are like us (and therefore unlike dumb artefacts). In the discourse of STS, descriptions of how people assimilate robots into their activities are presented directly or indirectly against the backdrop of actor-network theory, which prompts attributing agency to mundane artefacts. In contradistinction to both social robotics and STS, it is suggested here that to view a capacity to partake in dialogical action (to have a 'voice') is necessary for regarding an artefact as authentically social...
April 1, 2017: Social Studies of Science
https://www.readbyqxmd.com/read/28464727/consumer-led-health-related-online-sources-and-their-impact-on-consumers-an-integrative-review-of-the-literature
#4
Elina Laukka, Piia Rantakokko, Marjo Suhonen
The aim of the review was to describe consumer-led health-related online sources and their impact on consumers. The review was carried out as an integrative literature review. Quantisation and qualitative content analysis were used as the analysis method. The most common method used by the included studies was qualitative content analysis. This review identified the consumer-led health-related online sources used between 2009 and 2016 as health-related online communities, health-related social networking sites and health-related rating websites...
April 1, 2017: Health Informatics Journal
https://www.readbyqxmd.com/read/28460939/a-holistic-approach-to-food-safety-risks-food-fraud-as-an-example
#5
Hans J P Marvin, Yamine Bouzembrak, Esmée M Janssen, H J van der Fels-Klerx, Esther D van Asselt, Gijs A Kleter
Production of sufficient, safe and nutritious food is a global challenge faced by the actors operating in the food production chain. The performance of food-producing systems from farm to fork is directly and indirectly influenced by major changes in, for example, climate, demographics, and the economy. Many of these major trends will also drive the development of food safety risks and thus will have an effect on human health, local societies and economies. It is advocated that a holistic or system approach taking into account the influence of multiple "drivers" on food safety is followed to predict the increased likelihood of occurrence of safety incidents so as to be better prepared to prevent, mitigate and manage associated risks...
November 2016: Food Research International
https://www.readbyqxmd.com/read/28460211/controversies-about-cervical-cancer-screening-a-qualitative-study-of-roma-women-s-non-participation-in-cervical-cancer-screening-in-romania
#6
Trude Andreassen, Elisabete Weiderpass, Florian Nicula, Ofelia Suteu, Andreea Itu, Minodora Bumbu, Aida Tincu, Giske Ursin, Kåre Moen
Romania has Europe's highest incidence and mortality of cervical cancer. While a free national cervical cancer-screening programme has been in operation since 2012, participation in the programme is low, particularly in minority populations. The aim of this study was to explore Roma women's (non)participation in the programme from women's own perspectives and those of healthcare providers and policy makers. We carried out fieldwork for a period of 125 days in 2015/16 involving 144 study participants in Cluj and Bucharest counties...
June 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28452007/lps-oleuropein-and-blueberry-extracts-affect-the-survival-morphology-and-phosphoinositide-signalling-in-stimulated-human-endothelial-cells
#7
Vincenza Rita Lo Vasco, Martina Leopizzi, Valeria Di Maio, Tania Di Raimo, Stefania Cesa, Alessandra Masci, Carlo Della Rocca
Endothelial cells (EC) act as leading actors in angiogenesis. Understanding the complex network of signal transduction pathways which regulate angiogenesis might offer insights in the regulation of normal and pathological events, including tumours, vascular, inflammatory and immune diseases. The effects of olive oil and of Blueberry extracts upon the phosphoinositide (PI)-specific phospholipase C (PLC) enzymes were evaluated both in quiescent and inflammatory stimulated human umbilical vein EC (HUVEC) using molecular biology (multiliquid bioanalysis) and immunofluorescence techniques...
April 27, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/28439403/policy-entrepreneurship-and-policy-networks-in-healthcare-systems-the-case-of-israel-s-pediatric-dentistry-reform
#8
Nissim Cohen, Tuvia Horev
BACKGROUND: Can the entry of a policy entrepreneur challenge the equilibrium of a policy network and promote changes that might clash with the goals of powerful civil-servants and/or interest groups and, if so, why and how? Our goal is to examine two sides of the same coin: how does an in-depth analysis of Israel's dental care reform enrich our understanding of policy networks and policy entrepreneurship? Second, how does the literature on policy networks and policy entrepreneurship help us understand this reform? Based on a theoretical framework that appears in the literature of policy entrepreneurship and policy networks, we analyze the motivations, goals and strategies of the main actors involved in the process of reforming pediatric dental care in Israel...
2017: Israel Journal of Health Policy Research
https://www.readbyqxmd.com/read/28436891/off-policy-reinforcement-learning-for-synchronization-in-multiagent-graphical-games
#9
Jinna Li, Hamidreza Modares, Tianyou Chai, Frank L Lewis, Lihua Xie
This paper develops an off-policy reinforcement learning (RL) algorithm to solve optimal synchronization of multiagent systems. This is accomplished by using the framework of graphical games. In contrast to traditional control protocols, which require complete knowledge of agent dynamics, the proposed off-policy RL algorithm is a model-free approach, in that it solves the optimal synchronization problem without knowing any knowledge of the agent dynamics. A prescribed control policy, called behavior policy, is applied to each agent to generate and collect data for learning...
April 17, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28435425/power-and-integrated-health-care-shifting-from-governance-to-governmentality
#10
André Janse van Rensburg, Asta Rau, Pieter Fourie, Piet Bracke
Integrated care occurs within micro, meso and macro levels of governance structures, which are shaped by complex power dynamics. Yet theoretically-led notions of power, and scrutiny of its meanings and its functioning, are neglected in the literature on integrated care. We explore an alternative approach. Following a discussion on governance, two streams of theorising power are presented: mainstream and second-stream. Mainstream concepts are based on the notion of power-as-capacity, of one agent having the capacity to influence another-so the overall idea is 'power over?'...
September 14, 2016: International Journal of Integrated Care
https://www.readbyqxmd.com/read/28433927/performing-boundary-work-the-emergence-of-a-new-practice-in-a-hybrid-operating-room
#11
Kajsa Lindberg, Lars Walter, Elena Raviola
This paper addresses the processes of boundary work, in relation to the introduction of new technology, unfolding during the emergence of new medical practices. Inspired by Gieryn's fluid and practical view of boundaries and boundary work, and by Actor-Network Theory's description of scripting processes, we study the processes of negotiating and (re-)constructing boundaries in order to reveal both the interactions between different kinds of boundary work and their situatedness in the context of the emerging practice...
June 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28429970/taking-data-seriously-the-value-of-actor-network-theory-in-rethinking-patient-experience-data
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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