Circadian rhythm

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A circadian rhythm is an endogenously driven roughly 24-hour cycle in biochemical, physiological, or behavioural processes. (Wikipedia.org)






Conferences related to Circadian rhythm

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2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore


2019 American Control Conference (ACC)

Technical topics include biological systems, vehicle dynamics and control, adaptive control, consensus control, cooperative control, control of communication networks, control of networked systems, control of distributed parameter systems, decentralized control, delay systems, discrete-event systems, fault detection, fault-tolerant systems, flexible structures, flight control, formation flying, fuzzy systems, hybrid systems, system identification, iterative learning control, model predictive control, linear parameter-varying systems, linear matrix inequalities, machine learning, manufacturing systems, robotics, multi-agent systems, neural networks, nonlinear control, observers, optimal control, optimization, path planning, navigation, robust control, sensor fusion, sliding mode control, stochastic systems, switched systems, uncertain systems, game theory.

  • 2020 American Control Conference (ACC)

    The ACC is the annual conference of the American Automatic Control Council (AACC, the U.S. national member organization of the International Federation for Automatic Control (IFAC)). The ACC is internationally recognized as a premier scientific and engineering conference dedicated to the advancement of control theory and practice. The ACC brings together an international community of researchers and practitioners to discuss the latest findings in automatic control. The 2020 ACC technical program will

  • 2018 Annual American Control Conference (ACC)

    Technical topics include biological systems, vehicle dynamics and control, adaptive control, consensus control, cooperative control, control of communication networks, control of networked systems, control of distributed parameter systems, decentralized control, delay systems, discrete-event systems, fault detection, fault-tolerant systems, flexible structures, flight control, formation flying, fuzzy systems, hybrid systems, system identification, iterative learning control, model predictive control, linear parameter-varying systems, linear matrix inequalities, machine learning, manufacturing systems, robotics, multi-agent systems, neural networks, nonlinear control, observers, optimal control, optimization, path planning, navigation, robust control, sensor fusion, sliding mode control, stochastic systems, switched systems, uncertain systems, game theory.

  • 2017 American Control Conference (ACC)

    Technical topics include biological systems, vehicle dynamics and control, adaptive control, consensus control, cooperative control, control of communication networks, control of networked systems, control of distributed parameter systems, decentralized control, delay systems, discrete-event systems, fault detection, fault-tolerant systems, flexible structures, flight control, formation flying, fuzzy systems, hybrid systems, system identification, iterative learning control, model predictive control, linear parameter-varying systems, linear matrix inequalities, machine learning, manufacturing systems, robotics, multi-agent systems, neural networks, nonlinear control, observers, optimal control, optimization, path planning, navigation, robust control, sensor fusion, sliding mode control, stochastic systems, switched systems, uncertain systems, game theory.

  • 2016 American Control Conference (ACC)

    Control systems theory and practice. Conference topics include biological systems, vehicle dynamics and control, consensus control, cooperative control, control of communication networks, control of networked systems, control of distributed parameter systems, decentralized control, delay systems, discrete-event systems, fault detection, fault-tolerant systems, flexible structures, flight control, formation flying, fuzzy systems, hybrid systems, system identification, iterative learning control, model predictive control, linear parameter-varying systems, linear matrix inequalities, machine learning, manufacturing systems, robotics, multi-agent systems, neural networks, nonlinear control, observers, optimal control, optimization, path planning, navigation, robust control, sensor fusion, sliding mode control, stochastic systems, switched systems, uncertain systems, game theory.

  • 2015 American Control Conference (ACC)

    control theory, technology, and practice

  • 2014 American Control Conference - ACC 2014

    All areas of the theory and practice of automatic control, including but not limited to network control systems, model predictive control, systems analysis in biology and medicine, hybrid and switched systems, aerospace systems, power and energy systems and control of nano- and micro-systems.

  • 2013 American Control Conference (ACC)

    Control systems theory and practice. Conference themes on sustainability, societal challenges for control, smart healthcare systems. Conference topics include biological systems, vehicle dynamics and control, consensus control, cooperative control, control of communication networks, control of networked systems, control of distributed parameter systems, decentralized control, delay systems, discrete-event systems, fault detection, fault-tolerant systems, flexible structures, flight control, formation flying, fuzzy systems, hybrid systems, system identification, iterative learning control, model predictive control, linear parameter-varying systems, linear matrix inequalities, machine learning, manufacturing systems, robotics, multi-agent systems, neural networks, nonlinear control, observers, optimal control, optimization, path planning, navigation, robust control, sensor fusion, sliding mode control, stochastic systems, switched systems, uncertain systems, game theory.

  • 2012 American Control Conference - ACC 2012

    All areas of control engineering and science.

  • 2011 American Control Conference - ACC 2011

    ACC provides a forum for bringing industry and academia together to discuss the latest developments in the area of Automatic Control Systems, from new control theories, to the advances in sensors and actuator technologies, and to new applications areas for automation.

  • 2010 American Control Conference - ACC 2010

    Theory and practice of automatic control

  • 2009 American Control Conference - ACC 2009

    The 2009 ACC technical program will cover new developments related to theory, application, and education in control science and engineering. In addition to regular technical sessions the program will also feature interactive and tutorial sessions and preconference workshops.

  • 2008 American Control Conference - ACC 2008

  • 2007 American Control Conference - ACC 2007

  • 2006 American Control Conference - ACC 2006 (Silver Anniversary)

  • 2005 American Control Conference - ACC 2005

  • 2004 American Control Conference - ACC 2004

  • 2003 American Control Conference - ACC 2003

  • 2002 American Control Conference - ACC 2002

  • 2001 American Control Conference - ACC 2001

  • 2000 American Control Conference - ACC 2000

  • 1999 American Control Conference - ACC '99

  • 1998 American Control Conference - ACC '98

  • 1997 American Control Conference - ACC '97

  • 1996 13th Triennial World Congress of the International Federation of Automatic Control (IFAC)


2019 IEEE 15th International Conference on Control and Automation (ICCA)

The 15th IEEE International Conference on Control and Automation (IEEE ICCA 2019) will be held Tuesday through Friday, July 16-19, 2019, in Edinburgh, Scotland. The conference is jointly organized by IEEE Control Systems Chapter, Singapore, and IEEE Control Chapter for United Kingdom and Ireland. It is technically sponsored by IEEE Control Systems Society. It aims to create a forum for scientists and practising engineers throughout the world to present the latest research findings and ideas in the areas of control and automation, and possible contributions toward sustainable development and environment preservation. The conference is featured with the Best Paper Award and the Best Student Paper Award.


2019 IEEE 19th International Conference on Nanotechnology (IEEE-NANO)

DNA Nanotechnology Micro-to-nano-scale Bridging Nanobiology and Nanomedicine Nanoelectronics Nanomanufacturing and Nanofabrication Nano Robotics and Automation Nanomaterials Nano-optics, Nano-optoelectronics and Nanophotonics Nanofluidics Nanomagnetics Nano/Molecular Heat Transfer & Energy Conversion Nanoscale Communication and Networks Nano/Molecular Sensors, Actuators and Systems


2019 IEEE 58th Conference on Decision and Control (CDC)

The CDC is recognized as the premier scientific and engineering conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, systems and control, and related areas.The 58th CDC will feature contributed and invited papers, as well as workshops and may include tutorial sessions.The IEEE CDC is hosted by the IEEE Control Systems Society (CSS) in cooperation with the Society for Industrial and Applied Mathematics (SIAM), the Institute for Operations Research and the Management Sciences (INFORMS), the Japanese Society for Instrument and Control Engineers (SICE), and the European Union Control Association (EUCA).


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Periodicals related to Circadian rhythm

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Automatic Control, IEEE Transactions on

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Circuits and Systems I: Regular Papers, IEEE Transactions on

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.


Computational Biology and Bioinformatics, IEEE/ACM Transactions on

Specific topics of interest include, but are not limited to, sequence analysis, comparison and alignment methods; motif, gene and signal recognition; molecular evolution; phylogenetics and phylogenomics; determination or prediction of the structure of RNA and Protein in two and three dimensions; DNA twisting and folding; gene expression and gene regulatory networks; deduction of metabolic pathways; micro-array design and analysis; proteomics; ...


Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on

Methods, algorithms, and human-machine interfaces for physical and logical design, including: planning, synthesis, partitioning, modeling, simulation, layout, verification, testing, and documentation of integrated-circuit and systems designs of all complexities. Practical applications of aids resulting in producible analog, digital, optical, or microwave integrated circuits are emphasized.


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Most published Xplore authors for Circadian rhythm

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Xplore Articles related to Circadian rhythm

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Influence of low sampling rate on heart rate variability analysis based on non-linear dynamics

Computers in Cardiology 1995, 1995

The aim of this study was to examine how sampling rates below 1000 Hz influence the precision of heart rate variability analysis. Simulated tachograms as well as tachograms from healthy persons were investigated. With parameters from time, frequency domain and non-linear dynamics these tachograms were classified. The results were compared with theoretical assumptions and special error measures were derived. New ...


Electromagnetic fields: the jury's still out. 1. Biological effects

IEEE Spectrum, 1990

Concerns that electromagnetic (EM) fields may cause cancer and endocrine and nervous system disorders are discussed. The focus is on 60 Hz fields, where the mechanism of interaction probably involves the cell membrane, is nonlinear, and may act by causing some cooperative phenomena among the components of the cell membrane. Two basic epidemiological study designs have been used in work ...


Effects of Light Waveforms on a Circadian Oscillation of Clock Genes

2006 IEEE/NLM Life Science Systems and Applications Workshop, 2006

For studying autonomous circadian rhythms of proteins in organisms, various mathematical models have been proposed. In this study, we have investigated bifurcations of periodic oscillations observed in circadian models incorporating the effect on a light-dark cycle and show that the waveform of the periodic variation in the light-induced parameter has a marked influence on the global bifurcation structure or the ...


Van der Pol networks with symmetry

Proceedings of the 40th IEEE Conference on Decision and Control (Cat. No.01CH37228), 2001

Concerns the modelling of biological control with rhythm, especially the mammalian circadian rhythm. Van der Pol oscillator networks have been proposed as a template to produce abstract circuit models that are capable of producing complex oscillatory and spiking patterns of behavior. Here, a particular case of a symmetrically coupled network is treated for its global behavior. It is shown that ...


Feasibility of a simple method for identifying sleep periods from Holter recordings

Computers in Cardiology, 2002

To determine whether sleep periods can be identified from Holter-derived data using a combination of hourly average HR patterns and hourly spectral plots, Holier data from N=77 randomly-selected subjects with self-reported bed:wake (B:W) times were examined. N=50 were patients with a recent MI (C), 12 were younger subjects from a Holler quality validation study (Y), and 15 were subjects>65 years ...


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Educational Resources on Circadian rhythm

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IEEE-USA E-Books

  • Influence of low sampling rate on heart rate variability analysis based on non-linear dynamics

    The aim of this study was to examine how sampling rates below 1000 Hz influence the precision of heart rate variability analysis. Simulated tachograms as well as tachograms from healthy persons were investigated. With parameters from time, frequency domain and non-linear dynamics these tachograms were classified. The results were compared with theoretical assumptions and special error measures were derived. New developed measures from non-linear dynamics showed an insensitive behavior to a reduced sampling frequency down to 128 Hz. The major results of this study lead to the conclusion to use sampling rates only above 120 Hz which implies a total error in the range of approximately 1.8/spl plusmn/1.5%. However only the use of sampling rates above 200 Hz provides nearly error free results.

  • Electromagnetic fields: the jury's still out. 1. Biological effects

    Concerns that electromagnetic (EM) fields may cause cancer and endocrine and nervous system disorders are discussed. The focus is on 60 Hz fields, where the mechanism of interaction probably involves the cell membrane, is nonlinear, and may act by causing some cooperative phenomena among the components of the cell membrane. Two basic epidemiological study designs have been used in work on cancer caused by EM fields. The first, retrospective case-control studies, compare an existing population of cases with a control group without the disease that is selected to be similar in all other characteristics. The second type computes the proportional mortality (or incidence) ratio, which compares the mortality from (or incidence of) disease in the sample population to that in general public. Selected studies that have looked for a link between exposure to power-frequency fields and cancer are summarized. Results have been mixed, but many studies do suggest a connection. One possibility is that EM fields act as a promoter of cancer. Also discussed are studies on birth defects and circadian rhythm, and cell and organ studies. Some experiments suggest that mediation by the cell membrane and/or large proteins that float in it is the mechanism by which fields couple to the cell.<<ETX>>

  • Effects of Light Waveforms on a Circadian Oscillation of Clock Genes

    For studying autonomous circadian rhythms of proteins in organisms, various mathematical models have been proposed. In this study, we have investigated bifurcations of periodic oscillations observed in circadian models incorporating the effect on a light-dark cycle and show that the waveform of the periodic variation in the light-induced parameter has a marked influence on the global bifurcation structure or the type of dynamic behavior resulting from the forcing term of the circadian oscillator by the LD cycles

  • Van der Pol networks with symmetry

    Concerns the modelling of biological control with rhythm, especially the mammalian circadian rhythm. Van der Pol oscillator networks have been proposed as a template to produce abstract circuit models that are capable of producing complex oscillatory and spiking patterns of behavior. Here, a particular case of a symmetrically coupled network is treated for its global behavior. It is shown that for a certain connection pattern the circuit is capable of producing globally asymptotically stable oscillations.

  • Feasibility of a simple method for identifying sleep periods from Holter recordings

    To determine whether sleep periods can be identified from Holter-derived data using a combination of hourly average HR patterns and hourly spectral plots, Holier data from N=77 randomly-selected subjects with self-reported bed:wake (B:W) times were examined. N=50 were patients with a recent MI (C), 12 were younger subjects from a Holler quality validation study (Y), and 15 were subjects>65 years old from the Cardiovascular Health Study (O). N=18 (C) were excluded for a combination of abnormal circadian rhythm and abnormal HRV plots. The accuracy of hourly HR+HRV patterns to identify bedtime /spl plusmn/1 hr was: 100% (O), 84% (C), and 100% (Y). Hourly HR+HRV patterns identified wake-times /spl plusmn/1 hr 100% of the time for (O), 91% for (C) and 100% (Y). Identification of sleep periods from Holter data appears feasible in different groups using a simple algorithm. This method could permit detailed study of sleep periods in Holter cohorts where diaries are unavailable.

  • A wrist-mounted activity and pulse recording system

    A wrist movement and arterial pulse recording system has been developed for continuous data acquisition in studies of activity/rest time periods, sleep quantity and quality, general activity level, resting heart rate and circadian rhythms. The system employs a wrist-mounted optical sensor, low-power 8-bit single chip microcomputer and a compact flash memory. The microcomputer detects whether the wrist is moving or inactive; if it is moving, activity signals are recorded by the compact flash memory. If the wrist is at rest, the arterial pulse waveform is continuously recorded.

  • Stochastic kinetic analysis of transcriptional feedback models for circadian rhythms

    Rhythmic levels of activity with nearly twenty-four hour periods in the absence of environmental cues have been observed in species across four kingdoms. For the fly and the mouse it is established that these circadian rhythms arise from cellular genetic networks containing delayed transcriptional feedback mechanisms. This origination of physiologically relevant rhythms from dynamic feedback has inspired many mathematical models of this process. In the present work, the ability of four models from the literature to produce reliable oscillations in the face of stochastic disturbances is explored. The results show that there is a trade off of resistance to some disturbances for increased sensitivity to others, which allows an analogy to the Bode sensitivity integral to be made.

  • Effects and exploitation of tunable white light for circadian rhythm and human-centric lighting

    After an introduction on the effects of light on human wellness, circadian rhythm and perception of objects with this work we propose an innovative white LED lighting system able to smoothly change CCT (Correlated Color Temperature) while sensibly changing the spectral power density in the blue region (460-480 nm). Designing methodology, photometrical, electrical, optical and thermal results will be discussed. The proposed tunable white LED system is able to achieve high CRI (Color Rendering Index) (above 90) in a large CCT range (2800 - 5500 K), thus allowing a high comfort light in different conditions. Results from thermal design indicate a maximum junction temperature of 85°C at 700 mA, with an equivalent thermal resistance junction to ambient of 1.6 K/W for the series of LEDs used in the light engine. The optical emission has been designed by means of a color mixing chamber and a parabolic reflector thus achieving a good color uniformity at different emission angles and 18° beam divergence. The Light engine is engineered to be efficient (above 85 lm/W) and cost effective while working with a standard commercially available constant current LED driver. The specific control gear can be programmed to control the intensity and CCT of several lamps connected together.

  • An artificial neural network model for generating periodic signals by synchronizing external stimuli

    A living body has self-organized information processing systems in their nerve system. They construct various internal models of the environment autonomically. Periodic behaviors, such as circadian rhythm, locomotion of limbs in walking and tapping, come from these internal pattern generators. They obtain the periodic signal by use of external stimuli, that is, brightness of day lights and images from eyes. In this study, the authors represent that a model based on multilayer type neural network with feedback connections. This neural network can construct periodic pattern generators by training using external input signal. Arbitrary periodic signal can be generated if the network trained properly. Both periodic scalar signals and periodic image signals were examined to investigate characteristic of the proposed model. After the neural network training, they generated periodic signals that are identical to training pattern autonomically. In addition, stability of the generation of periodic signals was observed even if noise was mixed in the signal generation process. This characteristic is corresponding to homeostasis of biological system. These results show a pattern generator similar to a biological system was constructed in the proposed model. This neural network model is expected to be convenient as a model to analyze the fundamental mechanism of the brain function.

  • Modeling and computer simulation of physiological rhythms and behaviors at home for data fusion programs in a telecare system

    The multivariate simulation is based on models of physiological and physical activities using Markov chains and Petri networks and is designed to produce the medical and behavioral data normally obtained from a patient living in the HIS/sup 2/. The HIS/sup 2/ is an experimental platform to develop and evaluate technologies that ensure high levels of safety and health care for residential treatment. It records a patient's vital signs, daily activities, and metrological conditions that are then interpreted and manipulated in the data fusion programs. The main goal of the computer simulation is to generate databases that allow us to assess the alarm triggering procedures and tools used in the data fusion analysis programs developed for the HIS/sup 2/. An example of data fusion program, the system for the automatic measurements of the circadian rhythms of activity, which uses these databases, is briefly presented.



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