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https://www.readbyqxmd.com/read/28436912/distributed-position-based-consensus-of-second-order-multiagent-systems-with-continuous-intermittent-communication
#1
Qiang Song, Fang Liu, Guanghui Wen, Jinde Cao, Xinsong Yang
This paper considers the position-based consensus in a network of agents with double-integrator dynamics and directed topology. Two types of distributed observer algorithms are proposed to solve the consensus problem by utilizing continuous and intermittent position measurements, respectively, where each observer does not interact with any other observers. For the case of continuous communication between network agents, some convergence conditions are derived for reaching consensus in the network with a single constant delay or multiple time-varying delays on the basis of the eigenvalue analysis and the descriptor method...
April 24, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28436891/off-policy-reinforcement-learning-for-synchronization-in-multiagent-graphical-games
#2
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/28422670/observer-based-robust-coordinated-control-of-multiagent-systems-with-input-saturation
#3
Xiaoling Wang, Housheng Su, Michael Z Q Chen, Xiaofan Wang
This paper addresses the robust semiglobal coordinated control of multiple-input multiple-output multiagent systems with input saturation together with dead zone and input additive disturbance. Observer-based coordinated control protocol is constructed, by combining the parameterized low-and-high-gain feedback technique and the high-gain observer design approach. It is shown that, under some mild assumptions on agents' intrinsic dynamics, the robust semiglobal consensus or robust semiglobal swarm can be approached for undirected connected multiagent systems...
April 13, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28419486/population-pharmacokinetic-analysis-of-bortezomib-in-pediatric-leukemia-patients-model-based-support-for-body-surface-area-based-dosing-over-the-2-to-16-year-age-range
#4
Michael J Hanley, Diane R Mould, Timothy J Taylor, Neeraj Gupta, Kaveri Suryanarayan, Rachel Neuwirth, Dixie-Lee Esseltine, Terzah M Horton, Richard Aplenc, Todd A Alonzo, Xiaomin Lu, Ashley Milton, Karthik Venkatakrishnan
This population analysis described the pharmacokinetics of bortezomib after twice-weekly, repeat-dose, intravenous administration in pediatric patients participating in 2 clinical trials: the phase 2 AALL07P1 (NCT00873093) trial in relapsed acute lymphoblastic leukemia and the phase 3 AAML1031 (NCT01371981) trial in de novo acute myelogenous leukemia. The sources of variability in the pharmacokinetic parameters were characterized and quantified to support dosing recommendations. Patients received intravenous bortezomib 1...
April 18, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28400632/management-strategies-for-mycosis-fungoides-in-india
#5
Tanumay Raychaudhury
Mycosis fungoides is the most common primary cutaneous T-cell lymphoma. The approach to diagnosis and further follow-up is outlined. Evidence for interventions is based classically on a Tumor Node Metastasis Blood TNMB "stage-based" approach. The treatment options in India are limited. The options as per risk stratification and prognostic index are discussed. Early stages and low-risk patients can be managed with expectant policy or skin-directed therapies including topical steroids and phototherapy; intermediate-risk patients can be opted for interferons or retinoids or low dose methotrexate along with radiotherapy including total skin electron beam therapy while high-risk patients are managed most often with single agent or multiagent palliative chemotherapy...
March 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28398275/natural-killer-t-cell-lymphomas-in-pediatric-and-adolescent-patients
#6
REVIEW
Amanda M Termuhlen
Natural killer/T-cell (NK/T-cell) lymphomas are rare in children and adolescents and consist predominantly of nasal-type extranodal NK/T-cell lymphomas. More than half of pediatric/adolescent patients with NK/T-cell lymphomas present with localized nasal/sinus involvement, but the disease may involve many organs. NK/T-cell lymphoma cells are cytotoxic and associated with necrosis and angioinvasion; they express CD56, CD2, cytoplasmic CD3 epsilon, and to a variable degree CD30. The cells contain Epstein-Barr virus (EBV)-encoded RNA...
March 2017: Clinical Advances in Hematology & Oncology: H&O
https://www.readbyqxmd.com/read/28392674/interventions-to-improve-the-response-of-professionals-to-children-exposed-to-domestic-violence-and-abuse-a-systematic-review
#7
William Turner, Marianne Hester, Jonathan Broad, Eszter Szilassy, Gene Feder, Jessica Drinkwater, Adam Firth, Nicky Stanley
Exposure of children to domestic violence and abuse (DVA) is a form of child maltreatment with short- and long-term behavioural and mental health impact. Health care professionals are generally uncertain about how to respond to domestic violence and are particularly unclear about best practice with regards to children's exposure and their role in a multiagency response. In this systematic review, we report educational and structural or whole-system interventions that aim to improve professionals' understanding of, and response to, DVA survivors and their children...
January 2017: Child Abuse Review
https://www.readbyqxmd.com/read/28384435/birthing-on-country-in-our-community-a-case-study-of-engaging-stakeholders-and-developing-a-best-practice-indigenous-maternity-service-in-an-urban-setting
#8
Sue Kildea, Sophie Hickey, Carmel Nelson, Jody Currie, Adrian Carson, Maree Reynolds, Kay Wilson, Sue Kruske, Megan Passey, Yvette Roe, Roianne West, Anton Clifford, Machellee Kosiak, Shannon Watego, Sally Tracy
Developing high-quality and culturally responsive maternal and infant health services is a critical part of 'closing the gap' in health disparities between Aboriginal and Torres Strait Islander people and other Australians. The National Maternity Services Plan led work that describes and recommends Birthing on Country best-practice maternity care adaptable from urban to very remote settings, yet few examples exist in Australia. This paper demonstrates Birthing on Country principles can be applied in the urban setting, presenting our experience establishing and developing a Birthing on Country partnership service model in Brisbane, Australia...
April 7, 2017: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/28380078/multiagent-cooperation-and-competition-with-deep-reinforcement-learning
#9
Ardi Tampuu, Tambet Matiisen, Dorian Kodelja, Ilya Kuzovkin, Kristjan Korjus, Juhan Aru, Jaan Aru, Raul Vicente
Evolution of cooperation and competition can appear when multiple adaptive agents share a biological, social, or technological niche. In the present work we study how cooperation and competition emerge between autonomous agents that learn by reinforcement while using only their raw visual input as the state representation. In particular, we extend the Deep Q-Learning framework to multiagent environments to investigate the interaction between two learning agents in the well-known video game Pong. By manipulating the classical rewarding scheme of Pong we show how competitive and collaborative behaviors emerge...
2017: PloS One
https://www.readbyqxmd.com/read/28375693/herd-those-sheep-emergent-multiagent-coordination-and-behavioral-mode-switching
#10
Patrick Nalepka, Rachel W Kallen, Anthony Chemero, Elliot Saltzman, Michael J Richardson
Effectively coordinating one's behaviors with those of others is essential for successful multiagent activity. In recent years, increased attention has been given to understanding the dynamical principles that underlie such coordination because of a growing interest in behavioral synchrony and complex-systems phenomena. Here, we examined the behavioral dynamics of a novel, multiagent shepherding task, in which pairs of individuals had to corral small herds of virtual sheep in the center of a virtual game field...
April 1, 2017: Psychological Science
https://www.readbyqxmd.com/read/28372872/trends-in-the-receipt-of-guideline-care-and-survival-for-women-with-ovarian-cancer-a-population-based-study
#11
Joan L Warren, Linda C Harlan, Edward L Trimble, Jennifer Stevens, Melvin Grimes, Kathleen A Cronin
BACKGROUND: We assessed trends in the receipt of guideline care and 2-year cause-specific survival for women diagnosed with ovarian cancer. METHODS: This retrospective cohort analysis used National Cancer Institute's Patterns of Care studies data for women diagnosed with ovarian cancer in 2002 and 2011 (weighted n=6427). Data included patient characteristics, treatment type, and provider characteristics. We used logistic regression to evaluate the association of year of diagnosis with receipt of guideline surgery, multiagent chemotherapy, or both...
March 31, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28371794/finite-horizon-h%C3%A2-consensus-control-of-time-varying-multiagent-systems-with-stochastic-communication-protocol
#12
Lei Zou, Zidong Wang, Huijun Gao, Fuad E Alsaadi
This paper is concerned with the distributed H∞ consensus control problem for a discrete time-varying multiagent system with the stochastic communication protocol (SCP). A directed graph is used to characterize the communication topology of the multiagent network. The data transmission between each agent and the neighboring ones is implemented via a constrained communication channel where only one neighboring agent is allowed to transmit data at each time instant. The SCP is applied to schedule the signal transmission of the multiagent system...
March 31, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28371788/distributed-consensus-optimization-in-multiagent-networks-with-time-varying-directed-topologies-and-quantized-communication
#13
Huaqing Li, Chicheng Huang, Guo Chen, Xiaofeng Liao, Tingwen Huang
This paper considers solving a class of optimization problems which are modeled as the sum of all agents' convex cost functions and each agent is only accessible to its individual function. Communication between agents in multiagent networks is assumed to be limited: each agent can only interact information with its neighbors by using time-varying communication channels with limited capacities. A technique which overcomes the limitation is to implement a quantization process to the interacted information. The quantized information is first encoded as a binary sequence at the side of each agent before sending...
March 31, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28369670/effect-of-metabolic-syndrome-on-the-mobility-benefit-of-a-structured-physical-activity-intervention-the-lifestyle-interventions-and-independence-for-elders-randomized-clinical-trial
#14
Anda Botoseneanu, Haiying Chen, Walter T Ambrosius, Heather G Allore, Stephen Anton, Sara C Folta, Abby C King, Barbara J Nicklas, Bonnie J Spring, Elsa S Strotmeyer, Thomas M Gill
OBJECTIVES: To test whether structured physical activity (PA) is associated with a greater reduction in major mobility disability (MMD) in older persons with metabolic syndrome (MetS) than in those without. DESIGN: Data from the Lifestyle Interventions and Independence for Elders (LIFE) Study, a multicenter randomized trial of 1,635 persons with assessments every 6 months (average 2.7 years). SETTING: Eight U.S. centers. PARTICIPANTS: Sedentary men and women aged 70 to 89 with functional limitations (N = 1,535); 100 participants were excluded because of missing MetS data...
March 28, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28368840/minimal-approximation-based-distributed-consensus-tracking-of-a-class-of-uncertain-nonlinear-multiagent-systems-with-unknown-control-directions
#15
Yun Ho Choi, Sung Jin Yoo
A minimal-approximation-based distributed adaptive consensus tracking approach is presented for strict-feedback multiagent systems with unknown heterogeneous nonlinearities and control directions under a directed network. Existing approximation-based consensus results for uncertain nonlinear multiagent systems in lower-triangular form have used multiple function approximators in each local controller to approximate unmatched nonlinearities of each follower. Thus, as the follower's order increases, the number of the approximators used in its local controller increases...
March 28, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28368839/necessary-and-sufficient-conditions-for-consensus-of-fractional-order-multiagent-systems-via-sampled-data-control
#16
Zhiyong Yu, Haijun Jiang, Cheng Hu, Juan Yu
In this paper, the consensus of fractional-order multiagent systems (FOMASs) is considered via sampled-data control over directed communication topology with the order 0 < α < 1. Two cases are considered. One is FOMASs without leader, and the other is FOMASs with a leader. For each case, by applying matrix theory and algebraic graph theory, some algebraic-type necessary and sufficient conditions based on the sampling period, the fractional-order, the coupling gain, and the structure of the network are established for achieving consensus of the system...
March 27, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28362593/stability-analysis-and-application-for-delayed-neural-networks-driven-by-fractional-brownian-noise
#17
Wuneng Zhou, Xianghui Zhou, Jun Yang, Jun Zhou, Dongbing Tong
This paper deals with two types of the stability problem for the delayed neural networks driven by fractional Brownian noise (FBN). The existence and the uniqueness of the solution to the main system with respect to FBN are proved via fixed point theory. Based on Hilbert-Schmidt operator theory and analytic semigroup principle, the mild solution of the stochastic neural networks is obtained. By applying the stochastic analytic technique and some well-known inequalities, the asymptotic stability criteria and the exponential stability condition are established...
March 10, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28331342/spotlight-on-atezolizumab-and-its-potential-in-the-treatment-of-advanced-urothelial-bladder-cancer
#18
REVIEW
Ahmet Murat Aydin, Solomon L Woldu, Ryan C Hutchinson, Martin Boegemann, Aditya Bagrodia, Yair Lotan, Vitaly Margulis, Laura-Maria Krabbe
Metastatic urothelial carcinoma of the bladder is an aggressive malignancy with poor prognosis, reflecting a lack of effective systemic therapies. The current standard of care includes multiagent platinum-based chemotherapy; however a majority of patients do not respond to treatment and most eventually succumb to disease. Recently, renewed interest in immunotherapy in the form of immune-checkpoint inhibition has gained widespread attention for a number of malignancies. Atezolizumab, an anti-PDL1 antibody, has been shown to be effective in a subset of patients previously treated with or unfit for platinum-based chemotherapy, and has shown durable responses with a good tolerability profile...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28321348/spontaneous-remission-of-an-untreated-myc-and-bcl2-coexpressing-high-grade-b-cell-lymphoma-a-case-report-and-literature-review
#19
D Alan Potts, Jonathan R Fromm, Ajay K Gopal, Ryan D Cassaday
Non-Hodgkin lymphomas (NHL) are a heterogeneous group of hematologic malignancies typically treated with multiagent chemotherapy. Rarely, spontaneous remissions can be observed, particularly in more indolent subtypes. The prognosis of aggressive NHL can be predicted using clinical and histopathologic factors. In aggressive B-cell NHL, the importance of MYC and BCL2 proto-oncogene coexpression (as assessed by immunohistochemistry) and high-grade histologic features are particularly noteworthy. We report a unique case of spontaneous remission in a patient with an aggressive B-cell NHL which harbored high-risk histopathologic features, including MYC protein expression at 70-80%, BCL2 protein expression, and morphologic features suggestive of high-grade B-cell lymphoma, NOS (formerly B-cell lymphoma unclassifiable with features intermediate between diffuse large B-cell lymphoma and Burkitt lymphoma [BCLU])...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28320680/data-driven-multiagent-systems-consensus-tracking-using-model-free-adaptive-control
#20
Xuhui Bu, Zhongsheng Hou, Hongwei Zhang
This paper investigates the data-driven consensus tracking problem for multiagent systems with both fixed communication topology and switching topology by utilizing a distributed model free adaptive control (MFAC) method. Here, agent's dynamics are described by unknown nonlinear systems and only a subset of followers can access the desired trajectory. The dynamical linearization technique is applied to each agent based on the pseudo partial derivative, and then, a distributed MFAC algorithm is proposed to ensure that all agents can track the desired trajectory...
March 14, 2017: IEEE Transactions on Neural Networks and Learning Systems
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