Note: This page contains sample records for the topic autonomous bdfig-wind generator from Science.gov.
While these samples are representative of the content of Science.gov,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of Science.gov
to obtain the most current and comprehensive results.
Last update: November 12, 2013.
1

Autonomous Generator for Technical Oxygen  

Microsoft Academic Search

The Autonomous Generator of Technical Oxygen(AGTO)has been achieved at ICMET Craiova, in cooperation with ICSI Rm. Valcea. It represents a product finalizing a scientific research theme financed by the romanian Ministry of Education and Research.The AGTO is intended to the brazing, welding and oxygas flame cutting processes, technical fields which can be actually found in all industrial applications. The presented

A. T. Rosca; V. Stanciu; V. Cimpoiasu; R. Scorei; D. Rosca

2004-01-01

2

Autonomous flight trajectory generation via attractor dynamics  

Microsoft Academic Search

This paper describes the use of non-linear attractor dynamics to generate trajectories free of collisions for an autonomous vehicle moving in 3D. Computer simulations are used to test the behaviour and stability of the airship motion during the task of flying toward a target destination while simultaneously avoiding collisions with (static or moving) obstacles. Results indicate that if parameter values

Estela Bicho; Andre Moreira; Manuel Carvalheira; Wolfram Erlhagen

2005-01-01

3

Autonomous Underwater Vehicle Thermoelectric Power Generation  

NASA Astrophysics Data System (ADS)

Autonomous underwater vehicles (AUVs) are a vital part of the oceanographer's toolbox, allowing long-term measurements across a range of ocean depths of a number of ocean properties such as salinity, fluorescence, and temperature profile. Buoyancy-based gliding, rather than direct propulsion, dramatically reduces AUV power consumption and allows long-duration missions on the order of months rather than hours or days, allowing large distances to be analyzed or many successive analyses of a certain area without the need for retrieval. Recent versions of these gliders have seen the buoyancy variation system change from electrically powered to thermally powered using phase-change materials, however a significant battery pack is still required to power communications and sensors, with power consumption in the region of 250 mW. The authors propose a novel application of a thermoelectric generation system, utilizing the depth-related variation in oceanic temperature. A thermal energy store provides a temperature differential across which a thermoelectric device can generate from repeated dives, with the primary purpose of extending mission range. The system is modeled in Simulink to analyze the effect of variation in design parameters. The system proves capable of generating all required power for a modern AUV.

Buckle, J. R.; Knox, A.; Siviter, J.; Montecucco, A.

2013-04-01

4

Trajectory generation for an on-road autonomous vehicle  

NASA Astrophysics Data System (ADS)

We describe an algorithm that generates a smooth trajectory (position, velocity, and acceleration at uniformly sampled instants of time) for a car-like vehicle autonomously navigating within the constraints of lanes in a road. The technique models both vehicle paths and lane segments as straight line segments and circular arcs for mathematical simplicity and elegance, which we contrast with cubic spline approaches. We develop the path in an idealized space, warp the path into real space and compute path length, generate a one-dimensional trajectory along the path length that achieves target speeds and positions, and finally, warp, translate, and rotate the one-dimensional trajectory points onto the path in real space. The algorithm moves a vehicle in lane safely and efficiently within speed and acceleration maximums. The algorithm functions in the context of other autonomous driving functions within a carefully designed vehicle control hierarchy.

Horst, John; Barbera, Anthony

2006-06-01

5

Generating functionals for autonomous latching dynamics in attractor relict networks  

PubMed Central

Coupling local, slowly adapting variables to an attractor network allows to destabilize all attractors, turning them into attractor ruins. The resulting attractor relict network may show ongoing autonomous latching dynamics. We propose to use two generating functionals for the construction of attractor relict networks, a Hopfield energy functional generating a neural attractor network and a functional based on information-theoretical principles, encoding the information content of the neural firing statistics, which induces latching transition from one transiently stable attractor ruin to the next. We investigate the influence of stress, in terms of conflicting optimization targets, on the resulting dynamics. Objective function stress is absent when the target level for the mean of neural activities is identical for the two generating functionals and the resulting latching dynamics is then found to be regular. Objective function stress is present when the respective target activity levels differ, inducing intermittent bursting latching dynamics.

Linkerhand, Mathias; Gros, Claudius

2013-01-01

6

Generation and Testing of Autonomous Mineral Detectors for Mars Rovers  

NASA Astrophysics Data System (ADS)

Currently Mars missions can collect more data than can be returned. Autonomous systems for data collection, processing and return will aid future Mars rovers in prioritizing and returning geologically important information. We have created a neural net detector that is able to successfully recognize carbonates from Visible/NIR (350-2500 nm) spectra of rocks collected from Mars analog environments (Gilmore et al. JGR 105, 29,223). In order to characterize and improve the detector's sensitivity, we are evaluating the performance of the detector under more realistic Martian environments: 1) carbonate minerals covered with palagonitic dust, and 2) carbonate minerals intimately mixed with basalt and palagonite. Lessons learned will be applied to the generation of additional detectors for minerals of interest (e.g., hydrothermal minerals). Aliquots of Martian Soil Simulant JSC Mars-1 palagonite were sieved to <45 microns and air fall deposited onto a calcite crystal and an adjacent glass slide. Spectra in the Vis/NIR were taken of the calcite after every layer up to a thickness of 270 microns (35 layers) with an Analytical Spectral Devices Field Spec Pro spectrometer operating from 350-2500 nm. The carbonate detector, operating over the range 2000-2400 nm, has an empirically established detection threshold based on training with thousands of synthetic linear combinations of laboratory mineral spectra designed to simulate expected Martian rocks. The detection threshold was reached in this experiment when the dust layer thickness reached 102 -116 microns (78-85% aerial coverage). This corresponds to a real change in the depth of the 2300 nm carbonate band (continuum depth, D= 1- [reflectance at trough center/reflectance at continuum] = ~0.1), and is similar to the detection threshold of the human experimenter. Very thin (~10-20 microns) coatings of palagonite dust had a large effect on the spectral response of the substrate, exemplifying the nonlinear mixing of the two components. We will report on experiments mixing known quantities of carbonate with basalt and palagonite at various grain sizes. We plan to assess the detector's ability to discern and quantify varying amounts of carbonate within the mixtures, and model the spectra as nonlinear mixtures to ascertain if any improvements in the accuracy of the neural net can be achieved. Finally, we will report on the generation and performance of a detector capable of identifying phyllosilicate minerals individually and as a mineral class.

Merrill, M. D.; Gilmore, M. S.; Castaño, R.; Bornstein, B.; Greenwood, J.

2004-05-01

7

Three-phase Four-wire Autonomous Wind Energy Conversion System Using Permanent Magnet Synchronous Generator  

Microsoft Academic Search

This article deals with an autonomous wind energy conversion system employing a permanent magnet synchronous generator feeding three-phase four-wire local loads in stand-alone mode without using a mechanical position sensor. The proposed autonomous wind energy conversion system utilizes two back-to-back connected pulse width modulated insulated gate bipolar transistors based voltage source converters with a battery energy storage system at their

Puneet K. Goel; Bhim Singh; S. S. Murthy; Shailendra K. Tiwari

2010-01-01

8

Real time gait generation for autonomous humanoid robots: A case study for walking  

Microsoft Academic Search

As autonomous humanoid robots assume more important roles in everyday life, they are expected to perform many different tasks and quickly adapt to unknown environments. Therefore, humanoid robots must generate quickly the appropriate gait based on information received from visual system. In this work, we present a new method for real time gait generation during walking based on Neural Networks.

Genci Capi; Yasuo Nasu; Leonard Barolli; Kazuhitsa Mitobe

2003-01-01

9

Autonomous wind-generated electricity for induction motors  

SciTech Connect

A wind turbine with variable-voltage, variable-frequency electrical output was used to power resistive loads and induction motors in an autonomous system. The AC system was selected because AC motors, in multiple kilowatt sizes, can be more practical than DC motors. A wind turbine which produces electricity has a lower overall efficiency than a system producing mechanical power but offers more flexibility in adapting to varying loads and in locating the wind turbine near the load. A permanent magnet alternator designed to operate with a rotor speed from 70 to 150 r/min was first operated in the laboratory. The frequency of the output varied from 30 to 65Hz, while the voltage changed from 85 to 218 V, resulting in voltage to frequency ratios (V/f) from 2.6 to 3.3 with various loads. The alternator, with a maximum rated output of 9kW, provided power to resistive load or induction motor loads. The tests revealed that standard three-phase, 240 V, 60 Hz, AC induction motors will operate with any input of 85 V and 30 Hz. A motor temperature rise of 40/sup 0/C above ambient was not exceeded when power was supplied by the alternator to a 7.6 kW motor. System efficiencies were nearly equivalent to those obtained with utility power, even though the V/f was below that calculated from the motor's nameplate. The wind energy conversion system (WECS) was then operated in windspeeds of 3.5 m/s or greater. The WECS was capable of providing power to satisfactorily operate induction motors in an autonomous system.

Vosper, F.C.; Clark, R.N.

1988-08-01

10

Shunt voltage regulators for autonomous induction generators. Part II: circuits and systems  

Microsoft Academic Search

For pt. I, see ibid., p.262-5. The paper presents different kinds of circuits used for autonomous induction generator output voltage regulation. Operation of SVC (static VAr compensator) and STATCON (static condenser) based voltage regulators is explained, and the advantages and disadvantages of each type are shown. Different control strategies of voltage source and current source inverter based STATCONs are discussed.

Alon Kuperman; Raul Rabinovici

2004-01-01

11

Autonomous variable speed power generating system with five level cascaded converter  

Microsoft Academic Search

The paper presents a novel autonomous power generating system with a three-phase five-level cascaded inverter (5LCI) topology fed from a diesel engine with multiple-winding permanent magnet synchronous generator set (DE\\/PMSG) for UPS application. The power electronics system consists of six isolated windings which supply six full-bridge diode rectifiers with boost converters stabilizing the DC link voltages for a particular cell

Lech M. Grzesiak; Jacek G. Tomasik

2007-01-01

12

An Autonomous Mobile Robot Guided by a Chaotic True Random Bits Generator  

NASA Astrophysics Data System (ADS)

In this work a robot's controller, which ensures chaotic motion to an autonomous mobile robot, is presented. This new strategy, which is very useful in many robotic missions, generates an unpredictable trajectory by using a chaotic path planning generator. The proposed generator produces a trajectory, which is the result of a sequence of planned target locations. In contrary with other similar works, this one is based on a new chaotic true random bits generator, which has as a basic feature the coexistence of two different synchronization phenomena between mutually coupled identical nonlinear circuits. Simulation tests confirm that the whole robot's workplace is covered with unpredictable way in a very satisfactory time.

Volos, Ch. K.; Kyprianidis, I. M.; Stouboulos, I. N.; Stavrinides, S. G.; Anagnostopoulos, A. N.

13

Diabetic autonomic neuropathy affects symptom generation and brain-gut axis.  

PubMed

OBJECTIVE Long-term diabetes leads to severe peripheral, autonomous, and central neuropathy in combination with clinical gastrointestinal symptoms. The brain-gut axis thus expresses a neurophysiological profile, and heart rate variability (HRV) can be correlated with clinical gastrointestinal symptoms. RESEARCH DESIGN AND METHODS Fifteen healthy volunteers and 15 diabetic patients (12 with type 1 diabetes) with severe gastrointestinal symptoms and clinical suspicion of autonomic neuropathy were included. Psychophysics and evoked brain potentials were assessed after painful rectosigmoid electrostimulations, and brain activity was modeled by brain electrical source analysis. Self-reported gastrointestinal symptoms (per the Patient Assessment of Upper Gastrointestinal Disorder Severity Symptom Index) and quality of life (SF-36 Short Form Survey) were collected. RESULTS Diabetic patients had autonomous neuropathy, evidenced by decreased electrocardiographic R-R interval (P = 0.03) and lower HRV (P = 0.008). Patients were less sensitive to painful stimulation (P = 0.007), had prolonged latencies of evoked potentials (P ? 0.001), and showed diminished amplitude of the N2-P2 component in evoked potentials (P = 0.01). There was a caudoanterior shift of the insular brain source (P = 0.01) and an anterior shift of the cingulate generator (P = 0.01). Insular source location was associated with HRV assessments (all P < 0.02), and the shift (expressed in mm) correlated negatively with physical health (P < 0.001) and positively with nausea (P = 0.03) and postprandial fullness (P = 0.03). Cingulate source shift was correlated negatively with physical health (P = 0.005) and positively with postprandial fullness (P ? 0.001). CONCLUSIONS This study provides evidence for interaction between autonomic neuropathy and peripheral nervous degeneration, as well as changes in dipole sources in diabetic patients with gastrointestinal symptoms. The findings may lead to improved treatment modalities targeting pharmacological neuroprotection or neuromodulation. PMID:24026548

Brock, Christina; Søfteland, Eirik; Gunterberg, Veronica; Frøkjær, Jens Brøndum; Lelic, Dina; Brock, Birgitte; Dimcevski, Georg; Gregersen, Hans; Simrén, Magnus; Drewes, Asbjørn Mohr

2013-09-11

14

Autonomous Decentralized Control of Supply and Demand by Inverter Based Distributed Generations in Isolated Microgrid  

NASA Astrophysics Data System (ADS)

Recently, because of the environmental burden mitigation, energy conservations, energy security, and cost reductions, distributed generations are attracting our strong attention. These distributed generations (DGs) have been already installed to the distribution system, and much more DGs will be expected to be connected in the future. On the other hand, a new concept called “Microgrid” which is a small power supply network consisting of only DGs was proposed and some prototype projects are ongoing in Japan. The purpose of this paper is to develop the three-phase instantaneous valued digital simulator of microgrid consisting of a lot of inverter based DGs and to develop a supply and demand control method in isolated microgrid. First, microgrid is modeled using MATLAB/SIMULINK. We develop models of three-phase instantaneous valued inverter type CVCF generator, PQ specified generator, PV specified generator, PQ specified load as storage battery, photovoltaic generation, fuel cell and inverter load respectively. Then we propose an autonomous decentralized control method of supply and demand in isolated microgrid where storage batteries, fuel cells, photovoltaic generations and loads are connected. It is proposed here that the system frequency is used as a means to control DG output. By changing the frequency of the storage battery due to unbalance of supply and demand, all inverter based DGs detect the frequency fluctuation and change their own outputs. Finally, a new frequency control method in autonomous decentralized control of supply and demand is proposed. Though the frequency is used to transmit the information on the supply and demand unbalance to DGs, after the frequency plays the role, the frequency finally has to return to a standard value. To return the frequency to the standard value, the characteristic curve of the fuel cell is shifted in parallel. This control is carried out corresponding to the fluctuation of the load. The simulation shows that the frequency can be controlled well and has been made clear the effectiveness of the frequency control system.

Shiki, Akira; Yokoyama, Akihiko; Baba, Jyunpei; Takano, Tomihiro; Gouda, Takahiro; Izui, Yoshio

15

Small-Signal Analysis of Autonomous Hybrid Distributed Generation Systems in Presence of Ultracapacitor and Tie-Line Operation  

Microsoft Academic Search

This paper presents small-signal analysis of isolated as well as interconnected autonomous hybrid distributed generation system for sudden variation in load demand, wind speed and solar radiation. The hybrid systems comprise of different renewable energy resources such as wind, photovoltaic (PV) fuel cell (FC) and diesel engine generator (DEG) along with the energy storage devices such as flywheel energy storage

Prakash K. Ray; Soumya R. Mohanty; Nand Kishor

2010-01-01

16

Analysis of the stability of synchronous motor — Generator unit used in propulsion systems of autonomous electric vehicles  

Microsoft Academic Search

This paper presents a comprehensive analysis of the functional stability of the motor - generator unit which is based on synchronous machines with a permanent magnet structure. This motor - generator unit can be used in the propulsion systems of autonomous electric vehicles. This analysis was made using simulations in the PSIM programming environment and its main goal is to

Ion Voncil?; Elena Voncil?; Grigore Fetec?u

2010-01-01

17

On-electrode autonomous current generator for multi-frequency EIT.  

PubMed

The paper presents an autonomous programmable current generator module for multi-frequency EIT systems. The module incorporates all stages from the sine wave generation with frequency and amplitude tuning, D/A converter and filter, a high output resistance voltage-to-current converter to the associated digital communication and control. The paper presents in depth the original digital quadrature signal generator and the output current generator with a high resistance. The other main blocks of the design use current practice specifications, since recent technological solutions proposed in the literature were found appropriate. The proposed signal generator circuit, characterized by a very low complexity, is analyzed in its capacity to produce multiple accurate signals up to 1 MHz in frequency. The precision output current source uses a modified current conveyor of type CCII with a high output resistance and low distortion. The output current frequency spectrum and linearity parameters obtained in the simulations are also described. The simulation results indicate a good linearity and high output resistance with an acceptable output voltage swing. The calculated performance parameters are validated with simulations, and future work for the prototype fabrication of the IC is outlined. PMID:18544811

Jivet, I; Dragoi, B

2008-06-10

18

A low-cost wireless system for autonomous generation of road safety alerts  

NASA Astrophysics Data System (ADS)

This paper describes an autonomous wireless system that generates road safety alerts, in the form of SMS and email messages, and sends them to motorists subscribed to the service. Drivers who regularly traverse a particular route are the main beneficiaries of the proposed system, which is intended for sparsely populated rural areas, where information available to drivers about road safety, especially bridge conditions, is very limited. At the heart of this system is the SmartBrick, a wireless system for remote structural health monitoring that has been presented in our previous work. Sensors on the SmartBrick network regularly collect data on water level, temperature, strain, and other parameters important to safety of a bridge. This information is stored on the device, and reported to a remote server over the GSM cellular infrastructure. The system generates alerts indicating hazardous road conditions when the data exceeds thresholds that can be remotely changed. The remote server and any number of designated authorities can be notified by email, FTP, and SMS. Drivers can view road conditions and subscribe to SMS and/or email alerts through a web page. The subscription-only form of alert generation has been deliberately selected to mitigate privacy concerns. The proposed system can significantly increase the safety of travel through rural areas. Real-time availability of information to transportation authorities and law enforcement officials facilitates early or proactive reaction to road hazards. Direct notification of drivers further increases the utility of the system in increasing the safety of the traveling public.

Banks, B.; Harms, T.; Sedigh Sarvestani, S.; Bastianini, F.

2009-03-01

19

Automatic generation of modules of object categorization for autonomous mobile robots  

NASA Astrophysics Data System (ADS)

Many robotic tasks require advanced systems of visual sensing. Robotic systems of visual sensing must be able to solve a number of different complex problems of visual data analysis. Object categorization is one of such problems. In this paper, we propose an approach to automatic generation of computationally effective modules of object categorization for autonomous mobile robots. This approach is based on the consideration of the stack cover problem. In particular, it is assumed that the robot is able to perform an initial inspection of the environment. After such inspection, the robot needs to solve the stack cover problem by using a supercomputer. A solution of the stack cover problem allows the robot to obtain a template for computationally effective scheduling of object categorization. Also, we consider an efficient approach to solve the stack cover problem. In particular, we consider an explicit reduction from the decision version of the stack cover problem to the satisfiability problem. For different satisfiability algorithms, the results of computational experiments are presented.

Gorbenko, Anna

2013-10-01

20

Autonomous water pumping system based on wind generation. Control by rotor frequency  

Microsoft Academic Search

There exists in Argentina a growing interest in alternative energy sources such as wind and solar energy for water pumping in remote areas. In this context, the main objective of the paper is to present and evaluate a configuration for an autonomous wind energy conversion system oriented to water pumping. It consists of a wind turbine with a wound rotor

Pablo Camocardi; Pedro Battaiotto; Ricardo Mantz

2010-01-01

21

NONHOLONOMIC MOTION GENERATION ON TRIM AEROSTATICS TRAJECTORIES FOR AN AUTONOMOUS UNDERACTUATED AIRSHIP  

Microsoft Academic Search

We are currently studying a small airship that has no metal framework and collapses when deflated. In the first part of this paper, dynamic modeling of small autonomous non rigid airships is presented, using the Newton-Euler approach. This study discusses the motion in 6 degrees of freedom since 6 independent coordinates are necessary to determine the position and orientation of

Salim HIMA; Yasmina BESTAOUI

22

The Contribution of Renewables on Reducing the Electricity Generation Cost in Autonomous Island Networks  

Microsoft Academic Search

The Aegean Archipelago is a remote Hellenic area, including several hundreds of scattered islands of various sizes. The electricity demand in the Aegean Archipelago islands has up to now been covered by the existing autonomous power stations (APS) at very high electricity production cost. In order to face the continuous load demand increase an integrated solution based on the exploitation

K. A. Kavadias; D. Zafirakis; E. Kondili; J. K. Kaldellis

2007-01-01

23

Subsea thermoelectric generators. 1- 10-watt peltier effect prototypes - a step towards autonomous electrical control units at subsea wellheads  

SciTech Connect

Offshore oil production activities require the operation of underwater hydraulic or electric equipment. The high cost of acquisition and installation of umbilical cables to supply power is leading to the development of independently powered cableless equipment, connected to the surface by the transmission and reception of control signals through the water. As a first step toward these autonomous wellhead control systems, the authors designed and successfully tested in laboratory conditions a thermoelectric generator able to supply at least 10 watts of electric power, extracting it from the temperature difference between the oil and the surrounding water. Hydraulic pumps and pressure accumulators, control electronics, and valve actuators for wellhead control units are all technically solved problems, even for seafloors as deep as 1,000 meters. However, an autonomous underwater wellhead control unit can only be conceived if an energy source is available at the seafloor. The development of a reliable and compact power source is indeed a fundamental step towards autonomous wet Christmas tree valve actuators.

Weid, J.P. von der; Silva, J.A.P. da; Gama, A.L.; Sant'Anna, A.C.

1994-05-01

24

Welding torch trajectory generation for hull joining using autonomous welding mobile robot  

NASA Astrophysics Data System (ADS)

Shipbuilding processes involve highly dangerous manual welding operations. Welding of ship hulls presents a hazardous environment for workers. This paper describes a new robotic system, developed by the SHIPWELD consortium, that moves autonomously on the hull and automatically executes the required welding processes. Specific focus is placed on the trajectory control of such a system and forms the basis for the discussion in this paper. It includes a description of the robotic hardware design as well as some methodology used to establish the torch trajectory control.

Hascoet, J. Y.; Hamilton, K.; Carabin, G.; Rauch, M.; Alonso, M.; Ares, E.

2012-04-01

25

Intelligent behavior generator for autonomous mobile robots using planning-based AI decision making and supervisory control logic  

NASA Astrophysics Data System (ADS)

In earlier research the Center for Self-Organizing and Intelligent Systems (CSOIS) at Utah State University (USU) have been funded by the US Army Tank-Automotive and Armaments Command's (TACOM) Intelligent Mobility Program to develop and demonstrate enhanced mobility concepts for unmanned ground vehicles (UGVs). One among the several out growths of this work has been the development of a grammar-based approach to intelligent behavior generation for commanding autonomous robotic vehicles. In this paper we describe the use of this grammar for enabling autonomous behaviors. A supervisory task controller (STC) sequences high-level action commands (taken from the grammar) to be executed by the robot. It takes as input a set of goals and a partial (static) map of the environment and produces, from the grammar, a flexible script (or sequence) of the high-level commands that are to be executed by the robot. The sequence is derived by a planning function that uses a graph-based heuristic search (A* -algorithm). Each action command has specific exit conditions that are evaluated by the STC following each task completion or interruption (in the case of disturbances or new operator requests). Depending on the system's state at task completion or interruption (including updated environmental and robot sensor information), the STC invokes a reactive response. This can include sequencing the pending tasks or initiating a re-planning event, if necessary. Though applicable to a wide variety of autonomous robots, an application of this approach is demonstrated via simulations of ODIS, an omni-directional inspection system developed for security applications.

Shah, Hitesh K.; Bahl, Vikas; Martin, Jason; Flann, Nicholas S.; Moore, Kevin L.

2002-07-01

26

Introduction of YACs containing a putative mammalian replication origin into mammalian cells can generate structures that replicate autonomously  

SciTech Connect

Yeast artificial chromosomes (YACs) containing or lacking a biochemically defined DNA replication origin were transferred from yeast to mammalian cells in order to determine whether origin-dependent autonomous replication would occur. A specialized YAC vector was designed to enable selection for YACs in mammalian cells and for monitoring YAC abundance in individual mammalian cells. All of eight clones made with linear and circularized YACs lacking the origin and seven of nine clones made with linear and circularized YACs containing the origin region contained single copies of the transfected YAC, along with various amounts of yeast DNA, integrated into single but different chromosomal sites. By contrast, two transformants derived from circularized YACs containing the putative replication origin showed very heterogeneous YAC copy number and numerous integration sites when analyzed after many generations of in vitro propagation. Analysis of both clones at an early time after fusion revealed variously sized extrachromosomal YAC/yeast structures reminiscent of the extrachromosomal elements found in some cells harboring amplified genes. The data are consistent with the interpretation that YACs containing a biochemically defined origin of replication can initially replicate autonomously, followed by integration into multiple chromosomal locations, as has been reported to occur in many example of gene amplification in mammalian cells. 75 refs., 8 figs.

Nonet, G.H. (Salk Inst. for Biological Studies, La Jolla, CA (United States) Univ. of California, San Diego, La Jolla (United States)); Wahl, G.M. (Salk Inst. for Biological Studies, La Jolla, CA (United States))

1993-03-01

27

Steady-state behaviour of an ac autonomous switched reluctance generator  

Microsoft Academic Search

The switched reluctance motor can be used in generation mode by selecting the firing angles of the phases. This implies the use of the asymmetrical half bridge Miller converter and position sensors or position estimators. In this paper an alternative current (AC) switched reluctance generator is studied. Generation is obtained by doing resonate each phase inductance with an external AC

Abelardo Martínez; Javier Vicuña; Francisco Perez; Eduardo Laloya; Bonifacio Martín; Tomás Pollán; Beatriz Sánchez; Juan Lladó

2007-01-01

28

Autonomous hybrid system using SCIG for hydro power generation and variable speed PMSG for wind power generation  

Microsoft Academic Search

This paper deals with an isolated wind-hydro hybrid generation system employing a Squirrel Cage Induction Generator (SCIG) driven by hydro turbine and a Permanent Magnet Synchronous Generator (PMSG) driven by a variable speed wind turbine feeding three-phase four-wire local loads. The proposed system utilizes two back to back connected Pulse Width Modulated (PWM) Insulated Gate Bipolar Transistors (IGBTs) based voltage

Puneet K. Goel; Bhim Singh; S. S. Murthy; Navin Kishore

2009-01-01

29

Autonomous hybrid system using PMSGs for hydro and wind power generation  

Microsoft Academic Search

This paper deals with an isolated wind-hydro hybrid generation system employing one Permanent Magnet Synchronous Generator (PMSG) driven by hydro turbine and another PMSG driven by a variable speed wind turbine feeding three-phase four-wire local loads. The proposed system utilizes two back to back connected Pulse Width Modulated (PWM) Insulated Gate Bipolar Transistors (IGBTs) based voltage source converters (VSCs) with

Puneet K. Goel; Bhim Singh; S. S. Murthy; N. Kishore

2009-01-01

30

A two-tiered, agent based approach for autonomous, evolutionary texture generation  

Microsoft Academic Search

This paper proposes a two-tiered, evolutionary architecture for computer based synthesis of textures. In this architecture, a traditional tree based texture generation system is controlled by a set of evolutionary agents. The main contribution of this work is that the user is able to choose the degree of interaction and control they exert over the system. Evolutionary agents are designed

James McClintock; Gary G. Yen

2008-01-01

31

Autonomous Intelligence Agents to generate process for architectural form using tree like structures  

Microsoft Academic Search

The purpose of this study is to experiment creating architectural form from nature, especially tree like structure, through scripting with Visual Basic for Application (VBA) in AutoCAD. Nowadays, using scripting has been extensively used in producing complex looking patterns quickly in architecture. For instance, agents are introduced to generate an infinite variety of tree like structures and patterns. The reason

Kwang Yeul Lee

32

Autonomously Generating Operations Sequences for a Mars Rover Using Artificial Intelligence-Based Planning  

NASA Astrophysics Data System (ADS)

This article discusses a proof-of-concept prototype for ground-based automatic generation of validated rover command sequences from high-level science and engineering activities. This prototype is based on ASPEN, the Automated Scheduling and Planning Environment. This artificial intelligence (AI)-based planning and scheduling system will automatically generate a command sequence that will execute within resource constraints and satisfy flight rules. An automated planning and scheduling system encodes rover design knowledge and uses search and reasoning techniques to automatically generate low-level command sequences while respecting rover operability constraints, science and engineering preferences, environmental predictions, and also adhering to hard temporal constraints. This prototype planning system has been field-tested using the Rocky 7 rover at JPL and will be field-tested on more complex rovers to prove its effectiveness before transferring the technology to flight operations for an upcoming NASA mission. Enabling goal-driven commanding of planetary rovers greatly reduces the requirements for highly skilled rover engineering personnel. This in turn greatly reduces mission operations costs. In addition, goal-driven commanding permits a faster response to changes in rover state (e.g., faults) or science discoveries by removing the time-consuming manual sequence validation process, allowing rapid "what-if" analyses, and thus reducing overall cycle times.

Sherwood, R.; Mutz, D.; Estlin, T.; Chien, S.; Backes, P.; Norris, J.; Tran, D.; Cooper, B.; Rabideau, G.; Mishkin, A.; Maxwell, S.

2001-07-01

33

An autonomous information generation and distribution system for the next generation of small satellites: examples of the BIRD mission experiments  

NASA Astrophysics Data System (ADS)

The general trend in remote sensing is on one hand to increase the number of spectral bands and the geometric resolution of the imaging sensors which leads to higher data rates and data volumes. On the other hand the user is often only interested in special information of the received sensor data and not in the whole data mass. Concerning these two tendencies a main part of the signal pre-processing can already be done for special users and tasks on-board a satellite. For the BIRD (Bispectral InfraRed Detection) mission a new approach of an on-board data processing is made. The main goal of the BIRD mission is the fire recognition and the detection of hot spots. This paper describes the technical solution and the first results, of an on-board image data processing system based on the sensor system on two new IR-Sensors and the stereo line scanner WAOSS (Wide-Angle-Optoelectronic-Scanner). The aim of this data processing system is to reduce the data stream from the satellite due to generations of thematic maps. This reduction will be made by a multispectral classification. For this classification a special hardware based on the neural network processor NI1000 was designed. This hardware is integrated in the payload data handling system of the satellite.

Halle, Winfried; Briess, Klaus; Kayal, Hakan

2004-02-01

34

PARISROC, an autonomous front-end ASIC for triggerless acquisition in next generation neutrino experiments  

NASA Astrophysics Data System (ADS)

PARISROC (Photomultiplier ARray Integrated in SiGe ReadOut Chip) is a complete readout chip in AustriaMicroSystems (AMS) SiGe 0.35 ?m technology designed to read array of 16 Photomultipliers (PMTs). The ASIC is realized in the context of the PMm2 (square meter PhotoMultiplier) project that has proposed a new system of “smart photo-detectors” composed by sensor and read-out electronics dedicated to next generation neutrino experiments. The future water Cherenkov detectors will take place in megaton size water tanks then with a large surface of photo-detection. We propose to segment the large surface in arrays with a single front-end electronics and only the useful data send in surface to be stocked and analyzed.This paper describes the second version of the ASIC and illustrates the chip principle of operation and the main characteristics thank to a series of measurements. It is a 16-channel ASIC with channels that work independently, in triggerless mode and all managed by a common digital part. Then main innovation is that all the channels are handled independently by the digital part so that only channels that have triggered are digitized. Then the data are transferred to the internal memory and sent out in a data driven way.The ASIC allows charge and time measurement. We measured a charge measurement range starting from 160 fC (1 photoelectron-p.e., at PMT gain of 106) to 100 pC (around 600 p.e.) at 1% of linearity; time tagging at 1 ns thanks to a 24-bit counter at 10 MHz and a Time to Digital Converter (TDC) on a 100 ns ramp.

Conforti Di Lorenzo, S.; Campagne, J. E.; Drouet, S.; Dulucq, F.; El Berni, M.; Genolini, B.; de La Taille, C.; Martin-Chassard, G.; Seguin Moreau, N.; Wanlin, E.; Xiangbo, Y.

2012-12-01

35

Autonomous RC Car Controller  

Microsoft Academic Search

The Embedded Computing Systems Laboratory is equipped with the Vanderbilt Embedded Computing Plat- form for Autonomous Vehicles (VECPAV)-an infrastructure designed to allow for system design in Simulink during design time and for automatic C-code generation and distribution onto real-time QNX computational nodes. The system was formerly used to control the autonomous motion of small helicopters. Our task was to use

Jessica Kane; Thao Nguyen

36

Subsea thermoelectric generators. 1- 10-watt peltier effect prototypes - a step towards autonomous electrical control units at subsea wellheads  

Microsoft Academic Search

Offshore oil production activities require the operation of underwater hydraulic or electric equipment. The high cost of acquisition and installation of umbilical cables to supply power is leading to the development of independently powered cableless equipment, connected to the surface by the transmission and reception of control signals through the water. As a first step toward these autonomous wellhead control

J. P. von der Weid; J. A. P. da Silva; A. L. Gama; A. C. SantAnna

1994-01-01

37

Autonomic Computing.  

National Technical Information Service (NTIS)

This report examines selected aspects of autonomic computing, explores some of its strengths and weaknesses, and outlines some of the current research projects being undertaken in this area. It also makes connections between this area and current work in ...

H. A. Mueller L. Brien M. Klein B. Wood

2006-01-01

38

Autonomic hyperreflexia  

MedlinePLUS

... a form of brain bleeding) Use of illegal stimulant drugs such as cocaine and amphetamines The following conditions share many symptoms with autonomic hyperreflexia, but have a different cause: ...

39

Autonomic neuropathy  

MedlinePLUS

... or nurse examines you. Your blood pressure or heart rate may change when lying down, sitting, and standing. Special tests to measure sweating and heart rate may be done. This is called "autonomic testing." ...

40

Autonomic Nervous System Activity Distinguishes among Emotions  

Microsoft Academic Search

Emotion-specific activity in the autonomic nervous system was generated by constructing facial prototypes of emotion muscle by muscle and by reliving past emotional experiences. The autonomic activity produced distinguished not only between positive and negative emotions, but also among negative emotions. This finding challenges emotion theories that have proposed autonomic activity to be undifferentiated or that have failed to address

Paul Ekman; Robert W. Levenson; Wallace V. Friesen

1983-01-01

41

Efficient autonomous heliostat system  

Microsoft Academic Search

In this work, an efficient autonomous solar energy system has been implemented for domestic use. It concentrates the solar heat to turn water into steam which in turn is channelled to drive an electricity turbine-generator. The prototype utilizes two heliostat reflector units, each of which has been designed to accurately and independently track the sun throughout the day and reflect

Nazar T. Ali; Kahtan A. Mezher; Ahmed Al Qayed; Neil McEwan; Abdul Muhsin M. Altimimi

2012-01-01

42

Changes in cerebral morphology consequent to peripheral autonomic denervation  

Microsoft Academic Search

Pure autonomic failure (PAF) is characterized by an acquired, selective, peripheral denervation of the autonomic nervous system. Patients with PAF fail to generate bodily states of arousal via the autonomic nervous system in response to physical or cognitive effort. We used voxel-based morphometry to test the hypothesis that changes in the morphology of brain regions involved in autonomic control would

Hugo D Critchley; Catriona D Good; John Ashburner; Richard S Frackowiak; Christopher J Mathias; Raymond J Dolan

2003-01-01

43

Autonomous pedestrians  

Microsoft Academic Search

We address the difficult open problem of emulating the rich complexity of real pedestrians in urban environments. Our artificial life approach integrates motor, perceptual, behavioral, and cognitive components within a model of pedestrians as individuals. Our comprehensive model feature innovations in these components, as well as in their combination, yielding results of unprecedented fidelity and complexity for fully autonomous multi-human

Wei Shao; Demetri Terzopoulos

2005-01-01

44

Autonomous pedestrians  

Microsoft Academic Search

We address the difficult open problem of emulating the rich complexity of real pedestrians in urban environments. Our artificial life approach integrates motor, perceptual, behavioral, and cognitive components within a model of pedestrians as individuals. Our comprehensive model features innovations in these components, as well as in their combination, yielding results of unprecedented fidelity and complexity for fully autonomous multi-human

Wei Shao; Demetri Terzopoulos

2007-01-01

45

Autonomous magnetocumulative power supply  

NASA Astrophysics Data System (ADS)

Helical magnetocumulative generators (MCGs) fed from explosive piezo generators (EPGs) are the most compact power supplies with an output energy of 1-10 kJ. EPGs are successfully coupled with MCGs in the operation mode and in structural parameters; these generators are easy to operate and do not require transformers or commutators. We report on the results of designing an autonomous small-size power supply based on EPGs and MCGs. Owing to bidirectional impact loading of the piezoceramic block of an EPG, the energy at the piezo generator output attains values of ˜25 J and is transferred to the helical MCG with an initial inductance of ˜1000 ?H. The power supply is constructed in the form of a monoblock with a volume of ˜2 dm3 or in the form of two separate devices connected by a high-voltage cable.

Demidov, V. A.; Sadunov, V. D.; Kazakov, S. A.; Boriskin, A. S.; Golosov, S. N.; Vlasov, Yu. V.; Utenkov, A. A.; Antipov, M. V.; Blinov, A. V.

2013-08-01

46

Autonomous renewable energy conversion system  

Microsoft Academic Search

This paper briefly reviews the need for renewable power generation and describes a medium-power Autonomous Renewable Energy Conversion System (ARECS), integrating conversion of wind and solar energy sources. The objectives of the paper are to extract maximum power from the proposed wind energy conversion scheme and to transfer this power and the power derived by the photovoltaic system in a

Ventzislav Valtchev; Alex Van den Bossche; Jozef Ghijselen; Jan Melkebeek

2000-01-01

47

Adaptive Critic Designs-based autonomous unmanned vehicles navigation: Application to robotic farm vehicles  

Microsoft Academic Search

This paper addresses the problem of generating autonomously an optimal control action sequence for robotic autonomous unmanned vehicles based on adaptive critic designs (ACDs) for their use in autonomous agriculture vehicles, in the context of precision agriculture. The main objective is to design autonomously an optimal controller that steers the center of the vehicle through a number of waypoints in

H. Daniel Patiño; Santiago Tosetti; Flavio Capraro

2009-01-01

48

Autonomic Nervous System Disorders  

MedlinePLUS

Your autonomic nervous system is the part of your nervous system that controls involuntary actions, such as the beating of your heart ... breathing and swallowing Erectile dysfunction in men Autonomic nervous system disorders can occur alone or as the result ...

49

Adaptive Behavior in Autonomous Agents  

Microsoft Academic Search

This paper provides an overview of the bottom-up approach to artificial intelligence (AI), commonly referred to as behavior-oriented AI. The behavior-oriented approach, with its focus on the interaction between autonomous agents and their environments, is introduced by contrasting it with the traditional approach of knowledge-based AI. Different notions of autonomy are discussed, and key problems of generating adaptive and complex

Tom Ziemke

1998-01-01

50

Control of autonomous airship  

Microsoft Academic Search

Scientific research and development on the control of autonomous airship have shown a significant growth in recent years. New applications appear in the areas such as freight carrier, advertising, monitoring, surveillance, transportation, military and scientific research. The control of Autonomous airship is a very important problem for the aerial robots research. In this paper, the previous research on the control

Yiwei Liu; Zengxi Pan; David Stirling; Fazel Naghdy

2009-01-01

51

Autonomous multifunctional nanobrushes-autonomous materials  

NASA Astrophysics Data System (ADS)

In this work, taking advantage of carbon nanotubes' small size, and exceptional mechanical, chemical and electrical properties, we report on a series of nano-synthesis procedures that combine conventional chemical vapor deposition and selective substrate area growth followed by chemical functionalizations to fabricate functionalized nano-brushes from aligned carbon nanotube arrays and chemically selective functional groups. The high aspect ratio and small dimension, mechanical stability and flexibility, surface chemical and adhesive characteristics of carbon nanotubes provide opportunities to create nano-brushes with selected chemical functionalities. The nano-brushes are made from aligned multi-walled carbon nanotube bristles grafted onto long SiC fiber handles in various configurations and functionalized with various chemical functional groups. These nano-brushes can easily be manipulated physically, either manually or with the aid of motors. Here, we explain the autonomous characteristics of the functionalized nano-brushes employing functional chemical groups such that the nano-brush can potentially collect various metal particles, ions, and contaminants from liquid solutions and the air environment, autonomously. These functionalized multiwalled carbon nanotube based nano-brushes can work swiftly in both liquid and air environments. With surface modification and functionalization, the nanotube nano-brushes can potentially become a versatile nano-devices in many chemical and biological applications, where they can autonomously pick up the particles they encounter since they can be chemically programmed to function as Autonomous Chemical Nano Robots (ACNR).

Ghasemi-Nejhad, Mehrdad N.; Tius, Marcus A.

2007-04-01

52

Explicit Substitution Internal Languages for Autonomous and *Autonomous Categories  

Microsoft Academic Search

We introduce a family of explicit substitution type theories as internal languagesfor autonomous (or symmetric monoidal closed) and -autonomous categories, inthe same sense that the simply-typed -calculus with surjective pairing is the internallanguage for cartesian closed categories. We show that the eight equalityand three commutation congruence axioms of the -autonomous type theory characterise -autonomous categories exactly. The associated rewrite systems

T. W. Koh; C. h L. Ong

1999-01-01

53

Pain-autonomic interactions.  

PubMed

There are extensive interactions between the neural structures involved in pain sensation and autonomic control. The insular and anterior cingulate cortices, amygdala, hypothalamus, periaqueductal grey, parabrachial nucleus, nucleus of the solitary tract, ventrolateral medulla and raphe nuclei receive converging nociceptive and visceral inputs from the spinal and trigeminal dorsal horns and initiate arousal, affective, autonomic, motor and pain modulatory responses to painful stimuli. This review will focus on some central pain-autonomic interactions potentially relevant for the pathophysiology of primary headache. PMID:16688616

Benarroch, E E

2006-05-01

54

Autonomous Flight Safety System.  

National Technical Information Service (NTIS)

Autonomous Flight Safety System (AFSS) is an independent flight safety system designed for small to medium sized expendable launch vehicles launching from or needing range safety protection while overlying relatively remote locations. AFSS replaces the ne...

B. Bull B. Ferrell J. Lanzi J. Simpson R. Zoerner S. Santuro

2004-01-01

55

Dysautonomia (Autonomic Dysfunction)  

MedlinePLUS

NINDS Dysautonomia Information Page Synonym(s): Autonomic Dysfunction, Familial Dysautonomia, Riley-Day Syndrome Table of Contents (click to jump to sections) What is Dysautonomia? Is there any treatment? ...

56

Autonomous Rovers for Human Exploration of Mars  

Microsoft Academic Search

Abstract Autonomous rovers are a critical element for the success of human exploration of Mars The robotic tasks required for human presence on Mars are beyond the ability of current rovers; these tasks include landing - site scouting and mining, as well as emplacement and maintenance of a habitat, fuel production facility, and power generator These tasks are required before

David E. Smith; Gregory A. Dorais; John Bresina; Keith Golden; Richard Washington

1998-01-01

57

Autonomous Orbit Navigator Development, Using GPS, Applied to Autonomous Orbit Control  

NASA Astrophysics Data System (ADS)

The appearance of modem global positioning systems motivated the study and development of precise and robust systems for autonomous orbit determination of artificial satellites. These systems maintain, independently from human intervention from the ground, a precise knowledge of the satellite orbital state, through the processing of the information, autonomously generated on-board, by a receiver of the positioning system used. One of the major motivations for the research and development of autonomous navigators, is the availability of real time information about the position and velocity of the satellite, required, for instance, in earth observation missions, for interpretation and analysis of the generated images. The appearance of global positioning systems and the consequent development of autonomous navigators, by making available onboard space vehicles, updated orbit estimations, with good accuracy level, made feasible the research and development of orbit autonomous control procedures. It allowed the orbital maneuvers execution process to be performed in a way totally independent from ground human intervention. Whereas the satellite attitude control reached a high level of autonomy, due to the fact that the attitude measurements are, in general, naturally generated on-board the spacecraft, the orbit control is still now almost totally planned and executed from ground commanded actions. The proposed work consists of the study, development, simulation and analysis of a simplified navigator coupled to an autonomous orbit control system, applied to the China-Brazil Earth Resources Satellites (CBERS). At first, an autonomous orbit determination procedure is developed and analyzed. Its objective is to improve the coarse geometric solution provided by Global Positioning System (GPS) receivers. This will be done by directly using this solution as input (observation) for a real time Kalman filtering process. The orbital state vector will be extended in order to include the systematic error imposed to the GPS geometric solution due to changes in the set of satellites which are visible to the receiver. The improved outputs of this process will then be used in the implementation of an autonomous control system for the Longitude Phase Drift of the spacecraft orbit (parameter which presents the higher frequency of corrective maneuvers application for heliosynchronous orbits in phase with the earth's rotation, as is the case for the CBERS series satellites. Finally, the performance of the proposed autonomous control procedure will be analyzed and compared with the other results achieved by autonomous control systems previously studied at Instituto Nacional de Pesquisas Espaciais (INPE), that directly use the coarse GPS navigation solution

Galski, Roberto Luiz

2002-01-01

58

Autonomic innervation in multiple system atrophy and pure autonomic failure  

Microsoft Academic Search

BackgroundPure autonomic failure (PAF) and multiple system atrophy (MSA) are both characterised by chronic dysautonomia although presenting different disability and prognosis. Skin autonomic function evaluation by indirect tests has revealed conflicting results in these disorders. Here, the authors report the first direct analysis of skin sympathetic fibres including structure and function in PAF and MSA to ascertain different underlying autonomic

V. Donadio; P. Cortelli; M. Elam; V. Di Stasi; P. Montagna; B. Holmberg; M. P. Giannoccaro; E. Bugiardini; P. Avoni; A. Baruzzi; R. Liguori

2010-01-01

59

Autonomous Aerobraking for Mars Orbiters  

NASA Astrophysics Data System (ADS)

Autonomous Aerobraking is a developing technology that will reduce cost and increase flexibility of an aerobraking orbiter around Mars. Currently in its second phase of development, autonomous aerobraking could be implemented for a 2018 Mars orbiter.

Prince, J. L.

2012-06-01

60

Notch Signaling Activates Yorkie Non-Cell Autonomously in Drosophila  

PubMed Central

In Drosophila imaginal epithelia, cells mutant for the endocytic neoplastic tumor suppressor gene vps25 stimulate nearby untransformed cells to express Drosophila Inhibitor-of-Apoptosis-Protein-1 (DIAP-1), conferring resistance to apoptosis non-cell autonomously. Here, we show that the non-cell autonomous induction of DIAP-1 is mediated by Yorkie, the conserved downstream effector of Hippo signaling. The non-cell autonomous induction of Yorkie is due to Notch signaling from vps25 mutant cells. Moreover, activated Notch in normal cells is sufficient to induce non-cell autonomous Yorkie activity in wing imaginal discs. Our data identify a novel mechanism by which Notch promotes cell survival non-cell autonomously and by which neoplastic tumor cells generate a supportive microenvironment for tumor growth.

Graves, Hillary K.; Woodfield, Sarah E.; Yang, Chih-Chao; Halder, Georg; Bergmann, Andreas

2012-01-01

61

Distributed computing using autonomous objects  

Microsoft Academic Search

Autonomous objects is a new computing and coordination paradigm for distributed systems, based on the concept of intelligent messages that carry their own behavior and that propagate autonomously through the underlying computational network. We survey and classify several existing systems that fall into this general category of autonomous objects and present a unifying view of the paradigm by describing the

Lubomir F. Bic

1995-01-01

62

Autonomic determinism: The modes of autonomic control, the doctrine of autonomic space, and the laws of autonomic constraint  

Microsoft Academic Search

Contemporary findings reveal that the multiple modes of autonomic control do not lie along a single continuum extending from parasympathetic to sympathetic dominance but rather distribute within a 2-dimensional space. The physiological origins and empirical documentation for the multiple modes of autonomic control are considered. Then a formal 2-dimensional conception of autonomic space is proposed, and a quantitative model for

Gary G. Berntson; John T. Cacioppo; Karen S. Quigley

1991-01-01

63

Autonomic Determinism: The Modes of Autonomic Control, the Doctrine of Autonomic Space, and the Laws of Autonomic Constraint  

Microsoft Academic Search

Contemporary findings reveal that the multiple modes of autonomic control do not lie along a single continuum extending from parasympathetic to sympathetic dominance but rather distribute within a 2-dimensional space. The physiological origins and empirical documentation for the multiple modes of autonomic control are considered. Then a formal 2-dimensional conception of autonomic space is proposed, and a quantitative model for

Gary G. Berntson; John T. Cacioppo; Karen S. Quigley

1991-01-01

64

Autonomous pathogen detection system 2001  

SciTech Connect

The objective of this project is to design, fabricate and field-demonstrate a fully Autonomous Pathogen Detector (identifier) System (APDS). This will be accomplished by integrating a proven flow cytometer and real-time polymerase chain reaction (PCR) detector with sample collection, sample preparation and fluidics to provide a compact, autonomously operating instrument capable of simultaneously detecting multiple pathogens and/or toxins. The APDS will be designed to operate in fixed locations, where it continuously monitors air samples and automatically reports the presence of specific biological agents. The APDS will utilize both multiplex immuno and nucleic acid assays to provide ''quasi-orthogonal'', multiple agent detection approaches to minimize false positives and increase the reliability of identification. Technical advancements across several fronts must first be made in order to realize the full extent of the APDS. Commercialization will be accomplished through three progressive generations of instruments. The APDS is targeted for domestic applications in which (1) the public is at high risk of exposure to covert releases of bioagent such as in major subway systems and other transportation terminals, large office complexes, and convention centers; and (2) as part of a monitoring network of sensors integrated with command and control systems for wide area monitoring of urban areas and major gatherings (e.g., inaugurations, Olympics, etc.). In this latter application there is potential that a fully developed APDS could add value to Defense Department monitoring architectures.

Langlois, R G; Wang, A; Colston, B; Masquelier, D; Jones, L; Venkateswaran, K S; Nasarabadi, S; Brown, S; Ramponi, A; Milanovich, F P

2001-01-09

65

Transparent autonomization in CORBA  

Microsoft Academic Search

Increasingly, software systems are constructed by integrating and composing multiple existing applications. The resulting complexity increases the need for self-management of the system. However, adding autonomic behavior to composite systems is difficult, espe- cially when the constituent components are heterogeneous and they were not originally designed to support such interactions. Moreover, entangling the code for self-management with the code for

Seyed Masoud Sadjadi; Philip K. Mckinley

2009-01-01

66

Towards Wearable Autonomous Microsystems  

Microsoft Academic Search

This paper presents our work towards a wearable autonomous microsystem for context recognition. The design process needs to take into account the properties ofa wearable environment in terms ofsen- sor placement for data extraction, energy harvesting, comfort and easy integration into clothes and accessories. We suggest to encapsulate the system in an embroidery or a button. The study ofa microsystem

Nagendra Bhargava Bharatula; Stijn Ossevoort; Mathias Stäger; Gerhard Tröster

2004-01-01

67

Autonomous driving goes downtown  

Microsoft Academic Search

Most computer-vision systems for vehicle guidance are for highway scenarios. Developing autonomous or driver-assistance systems for complex urban traffic poses new algorithmic and system-architecture challenges. To address these issues, the authors introduce their intelligent Stop&Go system and discuss appropriate algorithms and approaches for vision-module control

U. Franke; D. Gavrila; S. Gorzig; F. Lindner; F. Puetzold; C. Wohler

1998-01-01

68

Autonomous LHD loading  

Microsoft Academic Search

Machine vision is used for guidance of the autonomous loading of ore during underground mining. Three dimensional spatial data of the ore pile is derived in real-time from camera images and is used for planning the scooping process. A sensory integration technique combines feedforward from the same vision system with wheel odometry to guide the vehicle to and from the

M. K. Petty; J. Billingsley; T. Tran-Cong

1997-01-01

69

Autonomous formation flight  

Microsoft Academic Search

This article describes an approach to close-formation flight of autonomous aircraft. A standard LQ-based structure was synthesized for each vehicle and for formation position error control using linearized equations of motion and a lifting line model of the aircraft wake. We also consider the definition of a formation management structure, capable of dealing with a variety of generic transmission and

F. Giulietti; L. Pollini; M. Innocenti

2000-01-01

70

Autonomous Soccer Robots  

Microsoft Academic Search

The Robocup 97 competition provides an excellent opportunity to demonstrate the techniques and methods of artificial i ntelligence, autonomous agents and computer vision. On a soccer field the core capabilities a player must have are to navigate the field, track the ball and other agents, recognize the difference between agents, collaborate with other agents, and hit the ball in the

Wei-min Shen; Jafar Adibi; Rogelio Adobbati; Bonghan Cho; Ali Erdem; Hadi Moradi; Behnam Salemi; Sheila Tejada

1997-01-01

71

Magnetocardiographic QT dispersion during cardiovascular autonomic function tests  

Microsoft Academic Search

QT dispersion is considered to reflect nonhomogeneity of ventricular repolarization. The autonomic nervous system modulates\\u000a QT interval duration, but the effect may not be spatially homogenous. Magnetocardiography (MCG) registers the weak magnetik\\u000a fields generated by myocardial electric currents with high localizing accuracy. We studied the effect of rapid cardiovascular\\u000a autonomic nervous adjustment on QT dispersion in MCG. Ten healthy male

Petri Haapalahti; Markku Mäkijärvi; Petri Korhonen; Panu Takala; Juha Montonen; Yrjö Salorinne; Lasse Oikarinen; Matti Viitasalo; Lauri Toivonen

2000-01-01

72

Autonomic Nervous System  

Microsoft Academic Search

The autonomic nervous system coordinates involuntary control of viscera and other tissues throughout the body, with the exception\\u000a of skeletal muscle. This branch of the central nervous system, organized into parasympathetic and sympathetic divisions, integrates\\u000a efferent and afferent fibers that regulate the activities of the majority of organs, glands, and smooth musculature found\\u000a in the body. The presynaptic cell bodies

Kevin Fitzgerald; Robert F. Wilson; Paul A. Iaizzo

73

SIRTF autonomous star tracker  

Microsoft Academic Search

Two redundant AST-301 autonomous star trackers (AST) serve as the primary attitude sensors for JPL's space infrared telescope facility (SIRTF). These units, which employ a 1553B interface to output their attitude quaternions and uncertainty at a 2 Hz rate, provide a 1 sigmaaccuracy of better than 0.18, 0.18, and 5.1 arcsec about their X, Y, and Z axes, respectively. This

Roelof W. H. van Bezooijen

2003-01-01

74

Autonomous mobile platform II  

Microsoft Academic Search

The paper presents design of autonomous mobile platform based on the all terrain 1\\/8th scale four wheel drive radio control model. In this paper was considered problem of automatic control of mobile platform using information from GPS system, electronic compass and encoder. The mobile platform is equipped in two-stroke glow engine, heavy-duty drive train and wide-track suspension and controller based

Krzysztof Jaskot; Artur Babiarz

2011-01-01

75

Autonomous Mobile Networks  

Microsoft Academic Search

Summary form only given, as follows. Autonomous mobile networks are distributed ad-hoc networks of nodes that can sense, actuate, compute and communicate with each other using point-to-point multi-hop communication. The nodes in such networks include static sensors, mobile sensors, robots, and humans. Such systems combine the most advanced concepts in perception, communication and control to create computational systems capable of

Daniela Rus

2004-01-01

76

Local path control for an autonomous vehicle  

Microsoft Academic Search

A control system for an autonomous robot cart designed to operate in well-structured environments such as offices and factories is described. The onboard navigation system comprises a reference-state generator, an error-feedback controller, and cart-location sensing using odometry. There is a convenient separation between the path guidance and control logic. Under normal operating conditions, the controller ensures that the errors between

Winston L. Nelson; Ingeniar J. Cox

1988-01-01

77

Pharmacotherapy of autonomic failure  

PubMed Central

The clinical picture of autonomic failure is characterized by severe and disabling orthostatic hypotension. These disorders can develop as a result of damage of central neural pathways or peripheral autonomic nerves, caused either by a primary autonomic neurodegenerative disorder or secondary to systemic illness. Treatment should be focused on decreasing presyncopal symptoms instead of achieving blood pressure goals. Non-pharmacologic strategies such as physical counter-maneuvers, dietary changes (i.e. high salt diet, rapid water drinking or compression garments) are the first line therapy. Affected patients should be screened for co-morbid conditions such as post-prandial hypotension and supine hypertension that can worsen orthostatic hypotension if not treated. If symptoms are not controlled with these conservative measures the next step is to start pharmacological agents; these interventions should be aimed at increasing intravascular volume either by promoting water and salt retention (fludrocortisone) or by increasing red blood cell mass when anemia is present (recombinant erythropoietin). When pressor agents are needed, direct pressor agents (midodrine) or agents that potentiate sympathetic activity (atomoxetine, yohimbine, pyridostigmine) can be used. It is preferable to use short-acting pressor agents that can be taken on as needed basis in preparation for upright activities.

Shibao, Cyndya; Okamoto, Luis; Biaggioni, Italo

2012-01-01

78

Pharmacotherapy of autonomic failure.  

PubMed

The clinical picture of autonomic failure is characterized by severe and disabling orthostatic hypotension. These disorders can develop as a result of damage of central neural pathways or peripheral autonomic nerves, caused either by a primary autonomic neurodegenerative disorder or secondary to systemic illness. Treatment should be focused on decreasing pre-syncopal symptoms instead of achieving blood pressure goals. Non-pharmacologic strategies such as physical counter-maneuvers, dietary changes (i.e. high salt diet, rapid water drinking or compression garments) are the first line therapy. Affected patients should be screened for co-morbid conditions such as post-prandial hypotension and supine hypertension that can worsen orthostatic hypotension if not treated. If symptoms are not controlled with these conservative measures the next step is to start pharmacological agents; these interventions should be aimed at increasing intravascular volume either by promoting water and salt retention (fludrocortisone) or by increasing red blood cell mass when anemia is present (recombinant erythropoietin). When pressor agents are needed, direct pressor agents (midodrine) or agents that potentiate sympathetic activity (atomoxetine, yohimbine, pyridostigmine) can be used. It is preferable to use short-acting pressor agents that can be taken on as needed basis in preparation for upright activities. PMID:21664375

Shibao, Cyndya; Okamoto, Luis; Biaggioni, Italo

2011-06-12

79

Intelligent Autonomous Decentralized System (IADS)  

Microsoft Academic Search

In the paper, Intelligent Autonomous Decentralized Systems (IADS) is proposed. It is the development based on the combination of autonomous decentralized systems (ADS) and distributed artificial intelligence (DAI). The concept, model, architecture, performance, methodology and technology for design and implementation of IADS are discussed. The IADS based on Agent (Union-IADS, Market-IADS, Group-IADS) are presented. They have not only autonomous controllability

Tu Xu-yan; Tang Tao

2002-01-01

80

Flow-generated power for autonomous instruments  

Microsoft Academic Search

A small vertical axis wind turbine was tested in highly variable winds at various locations of the Antarctic. The turbine system was designed to stand close to an ice surface (0.5m, within the boundary layer, and in a turbulent regime), to survive the harsh conditions of deep field Antarctica, to function independent of wind direction, and to provide data on

D. E. DiMassa; J. Piskura

2003-01-01

81

Dysr?flexie autonome  

PubMed Central

Résumé Objectif Sensibiliser davantage les médecins de famille à la dysréflexie autonome (DA) chez les patients victimes d’une lésion médullaire (LM) et proposer certaines interventions. Sources de l’information On a fait une recension dans MEDLINE de 1970 à juillet 2011 à l’aide des expressions en anglais autonomic dysreflexia et spinal cord injury, ainsi que family medicine ou primary care. On a aussi passé en revue et utilisé d’autres ressources et guides de pratique pertinents. Message principal Il arrive souvent que les médecins de famille ne se sentent pas confiants de traiter des patients ayant une LM dont les problèmes sont complexes et exigent beaucoup de temps. Les médecins de famille ont l’impression de n’avoir pas la formation nécessaire pour répondre à leurs besoins. Pourtant, ils offrent une composante essentielle des soins à de tels patients et il est important qu’ils comprennent les problèmes médicaux particuliers aux LM. La dysréflexie autonome est un important et fréquent problème potentiellement sérieux que connaissent mal de nombreux médecins de famille. Cet article passe en revue les signes et les symptômes de la DA et présente certaines options de prise en charge aiguë, ainsi que des stratégies de prévention à l’intention des médecins de famille. Conclusion Les médecins de famille devraient savoir quels patients traumatisés médullaires sont susceptibles d’avoir une DA et surveiller ceux qui sont touchés par ce problème. Une explication est donnée dans cet article quant à l’approche à suivre pour la prise en charge aiguë. Les médecins de famille jouent un rôle essentiel dans la prévention de la DA, notamment par l’éducation (du patient et des autres professionnels de la santé) et la consignation dans le dossier médical de stratégies comme les soins appropriés de la vessie, de l’intestin et de la peau, d’avertissements et de plans de prise en charge.

Milligan, James; Lee, Joseph; McMillan, Colleen; Klassen, Hilary

2012-01-01

82

Autonomous interplanetary constellation design  

NASA Astrophysics Data System (ADS)

According to NASA's integrated space technology roadmaps, space-based infrastructures are envisioned as necessary ingredients to a sustained effort in continuing space exploration. Whether it be for extra-terrestrial habitats, roving/cargo vehicles, or space tourism, autonomous space networks will provide a vital communications lifeline for both future robotic and human missions alike. Projecting that the Moon will be a bustling hub of activity within a few decades, a near-term opportunity for in-situ infrastructure development is within reach. This dissertation addresses the anticipated need for in-space infrastructure by investigating a general design methodology for autonomous interplanetary constellations; to illustrate the theory, this manuscript presents results from an application to the Earth-Moon neighborhood. The constellation design methodology is formulated as an optimization problem, involving a trajectory design step followed by a spacecraft placement sequence. Modeling the dynamics as a restricted 3-body problem, the investigated design space consists of families of periodic orbits which play host to the constellations, punctuated by arrangements of spacecraft autonomously guided by a navigation strategy called LiAISON (Linked Autonomous Interplanetary Satellite Orbit Navigation). Instead of more traditional exhaustive search methods, a numerical continuation approach is implemented to map the admissible configuration space. In particular, Keller's pseudo-arclength technique is used to follow folding/bifurcating solution manifolds, which are otherwise inaccessible with other parameter continuation schemes. A succinct characterization of the underlying structure of the local, as well as global, extrema is thus achievable with little a priori intuition of the solution space. Furthermore, the proposed design methodology offers benefits in computation speed plus the ability to handle mildly stochastic systems. An application of the constellation design methodology to the restricted Earth-Moon system, reveals optimal pairwise configurations for various L1, L2, and L5 (halo, axial, and vertical) periodic orbit families. Navigation accuracies, ranging from O (10+/-1) meters in position space, are obtained for the optimal Earth-Moon constellations, given measurement noise on the order of 1 meter.

Chow, Cornelius Channing, II

83

Advanced Autonomous Systems for Space Operations  

NASA Astrophysics Data System (ADS)

New missions of exploration and space operations will require unprecedented levels of autonomy to successfully accomplish their objectives. Inherently high levels of complexity, cost, and communication distances will preclude the degree of human involvement common to current and previous space flight missions. With exponentially increasing capabilities of computer hardware and software, including networks and communication systems, a new balance of work is being developed between humans and machines. This new balance holds the promise of not only meeting the greatly increased space exploration requirements, but simultaneously dramatically reducing the design, development, test, and operating costs. New information technologies, which take advantage of knowledge-based software, model-based reasoning, and high performance computer systems, will enable the development of a new generation of design and development tools, schedulers, and vehicle and system health management capabilities. Such tools will provide a degree of machine intelligence and associated autonomy that has previously been unavailable. These capabilities are critical to the future of advanced space operations, since the science and operational requirements specified by such missions, as well as the budgetary constraints will limit the current practice of monitoring and controlling missions by a standing army of ground-based controllers. System autonomy capabilities have made great strides in recent years, for both ground and space flight applications. Autonomous systems have flown on advanced spacecraft, providing new levels of spacecraft capability and mission safety. Such on-board systems operate by utilizing model-based reasoning that provides the capability to work from high-level mission goals, while deriving the detailed system commands internally, rather than having to have such commands transmitted from Earth. This enables missions of such complexity and communication` distances as are not otherwise possible, as well as many more efficient and low cost applications. In addition, utilizing component and system modeling and reasoning capabilities, autonomous systems will play an increasing role in ground operations for space missions, where they will both reduce the human workload as well as provide greater levels of monitoring and system safety. This paper will focus specifically on new and innovative software for remote, autonomous, space systems flight operations. Topics to be presented will include a brief description of key autonomous control concepts, the Remote Agent program that commanded the Deep Space 1 spacecraft to new levels of system autonomy, recent advances in distributed autonomous system capabilities, and concepts for autonomous vehicle health management systems. A brief description of teaming spacecraft and rovers for complex exploration missions will also be provided. New on-board software for autonomous science data acquisition for planetary exploration will be described, as well as advanced systems for safe planetary landings. A new multi-agent architecture that addresses some of the challenges of autonomous systems will be presented. Autonomous operation of ground systems will also be considered, including software for autonomous in-situ propellant production and management, and closed- loop ecological life support systems (CELSS). Finally, plans and directions for the future will be discussed.

Gross, A. R.; Smith, B. D.; Muscettola, N.; Barrett, A.; Mjolssness, E.; Clancy, D. J.

2002-01-01

84

AUTONOMOUS VEHICLE TECHNOLOGIES FOR SMALL FIXED WING UAVS  

Microsoft Academic Search

Autonomous unmanned air vehicle ?ight con- trol systems require robust path generation to ac- count for terrain obstructions, weather, and moving threats such as radar, jammers, and unfriendly air- craft. In this paper, we outline a feasible, hierarchal approach for real-time motion planning of small au- tonomous flxed-wing UAVs. The approach divides the trajectory generation into four tasks: waypoint path

Derek Kingston; Randal Beard; Timothy McLain; Michael Larsen; Wei Ren

2003-01-01

85

Autonomous humanoid robot locomotion based on neural networks  

Microsoft Academic Search

This paper contributes to the problem of humanoid robot gait generation in unknown environments. The intention of the proposed method is to create an autonomous humanoid robot, able to take decisions and generate the appropriate optimal gait based on the information received by the eye system. Up to now, we have created two modules: walking and going upstairs. In order

Genci Capi; Yasuo Nasu; Kazuhisa Mitobe; Leonard Barolli

2002-01-01

86

UVOT autonomous operations  

NASA Astrophysics Data System (ADS)

The SWIFT/UVOT has a requirement for on-board autonomous control of exposures, health and safety. It is anticipated that the optimal form of control may not emerge until after launch and may change during the course of the mission. A flexible and readily re-configurable system is therefore required. Two schemes have been adopted. As well as the more usual approach of tables of experimental configurations, action tables mapping command sequences to key events have been implemented. The command sequences, consisting of a series of command words located in EEPROM, are executed using a stack-based software 'virtual CPU.' Each command word, analogous to hardware CPU assembler instructions, results in the execution of well-checked Ada code fragments. As well as implementing the UVOT commands, the code includes functionality such as delaying a specified time, awaiting action completion, 'subroutine' calls and simple flow control. These permit the construction of complex control sequences. A C-like language is used to describe the required sequences. A translator converts them to the required command word sequence that is then validated on a simulator. Reloading the command sequence or the tables referring to it alters the autonomous behavior of the instrument.

Huckle, Howard E.; Smith, Philip J.

2004-02-01

87

Autonomic Computing Panacea or Poppycock.  

National Technical Information Service (NTIS)

Autonomic Computing arose out of a need for a means to cope with rapidly growing complexity of integrating, managing, and operating computer-based systems as well as a need to reduce the total cost of ownership of today's systems. Autonomic Computing (AC)...

R. Sterritt M. Hinchey

2005-01-01

88

A step towards an autonomous planetary rover  

NASA Astrophysics Data System (ADS)

Recently, significant advances have been made in enabling autonomous rovers and robotic vehicles. Current robotic vehicles employ significant elements of autonomy in their low-level operations and control. A further important step is the integration of high-level intelligent systems with autonomous rover control architectures. In this paper, we describe the integration of two software systems: ASPEN (Automated Scheduling and Planning ENvironment) and WITS (Web Interface for TeleScience). WITS provides a high-level graphical interface to Rocky7, an experimental rover developed by the Jet Propulsion Laboratory (JPL). Using WITS, a user can naturally specify science activities and locations using actual images of the rover's environment. ASPEN accepts the science goals input using WITS, reasons about the low-level activities and resources required to achieve these goals, and generates the executable sequence to enable achievement of the requested goals. Future steps would include a migration of this software to the rover itself, allowing the rover to schedule its own activities, and thus behave more autonomously.

Rabideau, Gregg; Chien, Steve; Backes, Paul; Chalfant, Gene; Tso, Kam

1999-01-01

89

Autonomic and Coevolutionary Sensor Networking  

NASA Astrophysics Data System (ADS)

(WSNs) applications are often required to balance the tradeoffs among conflicting operational objectives (e.g., latency and power consumption) and operate at an optimal tradeoff. This chapter proposes and evaluates a architecture, called BiSNET/e, which allows WSN applications to overcome this issue. BiSNET/e is designed to support three major types of WSN applications: , and hybrid applications. Each application is implemented as a decentralized group of, which is analogous to a bee colony (application) consisting of bees (agents). Agents collect sensor data or detect an event (a significant change in sensor reading) on individual nodes, and carry sensor data to base stations. They perform these data collection and event detection functionalities by sensing their surrounding network conditions and adaptively invoking behaviors such as pheromone emission, reproduction, migration, swarming and death. Each agent has its own behavior policy, as a set of genes, which defines how to invoke its behaviors. BiSNET/e allows agents to evolve their behavior policies (genes) across generations and autonomously adapt their performance to given objectives. Simulation results demonstrate that, in all three types of applications, agents evolve to find optimal tradeoffs among conflicting objectives and adapt to dynamic network conditions such as traffic fluctuations and node failures/additions. Simulation results also illustrate that, in hybrid applications, data collection agents and event detection agents coevolve to augment their adaptability and performance.

Boonma, Pruet; Suzuki, Junichi

90

Adaptive critic motion control design of autonomous wheeled mobile robot by dual heuristic programming  

Microsoft Academic Search

Autonomous wheeled mobile robot (WMR) needs implementing velocity and path tracking control subject to complex dynamical constraints. Conventionally, this control design is obtained by analysis and synthesis or by domain expert to build control rules. This paper presents an adaptive critic motion control design, which enables WMR to autonomously generate the control ability by learning through trials. The design consists

Wei-song Lin; Ping-chieh Yang

2008-01-01

91

Emotional and autonomic consequences of spinal cord injury explored using functional brain imaging  

Microsoft Academic Search

In health, emotions are integrated with autonomic bodily responses. Emotional stimuli elicit changes in somatic (including autonomic) bodily states, which feedback to influence the expression of emotional feelings. In patients with spinal cord injury (SCI), this integration of emotion and bodily arousal is partially disrupted, impairing both efferent generation of sympathetic responses and afferent sensory feedback of visceral state via

Alessia Nicotra; Hugo D. Critchley; Christopher J. Mathias; Raymond J. Dolan

2006-01-01

92

Meiotic Transmission of an In Vitro–Assembled Autonomous Maize Minichromosome  

Microsoft Academic Search

Autonomous chromosomes are generated in yeast (yeast artificial chromosomes) and human fibrosarcoma cells (human artificial chromosomes) by introducing purified DNA fragments that nucleate a kinetochore, replicate, and segregate to daughter cells. These autonomous minichromosomes are convenient for manipulating and delivering DNA segments containing multiple genes. In contrast, commercial production of transgenic crops relies on methods that integrate one or a

Shawn R Carlson; Gary W Rudgers; Helge Zieler; Jennifer M Mach; Song Luo; Eric Grunden; Cheryl Krol; Gregory P Copenhaver; Daphne Preuss

2007-01-01

93

Parallel Operation of DFIGs in Three Phase Four Wire Autonomous Wind Energy Conversion System  

Microsoft Academic Search

This paper deals with a control algorithm for two parallel operated Doubly Fed Induction Generators (DFIGs) driven by wind turbines in a three phase four wire autonomous system feeding local loads. The proposed Autonomous Wind Energy Conversion System (AWECS) is using back to back connected Pulse Width Modulated (PWM) Insulated Gate Bipolar Transistors (IGBTs) based voltage source converters (VSCs) with

Puneet K. Goel; Bhim Singh; S. S. Murthy; N. Kishore

2009-01-01

94

Cardiac autonomic balance versus cardiac regulatory capacity  

Microsoft Academic Search

The concept of autonomic balance views autonomic states along a bipolar continuum from sympathetic (S) to parasympathetic (P) dominance, whereas regulatory capacity models emphasize overall autonomic flexibility as a marker of the capacity for regulation. These two concepts were evaluated for their utility in characterizing patterns of autonomic control. Measures of P (high frequency heart rate variability, HF) and S

Gary G. Berntson; Greg J. Norman; Louise C. Hawkley; JOHN T. CACIOPPOb

2008-01-01

95

Cognition and emotion in autonomous cars  

Microsoft Academic Search

In order to increase the acceptance of vehicles that drive (partly) autonomously, it seems advantageous that the driving style of autonomous cars is human-like. Furthermore, the acceptance of autonomous cars is believed to be increased when their actions and current state becomes more transparent to the passengers. These aspects can be tackled by implementing emotions to an autonomous car which

Sven Kraus; Matthias Althoff; B. Heissing; Martin Buss

2009-01-01

96

Evolutionary framework for test of autonomous systems  

Microsoft Academic Search

A DoD mission and challenge is to enable a high percentage of autonomous vehicles in the warfighter fleet by 2015. These systems will need to display a high degree of autonomous capabilities. The capabilities of these autonomous systems must be acceptable to the warfighter and his\\/her logistical support structure. Autonomous systems of the future will need to be tested so

Raj Subbu; Nikita Visnevski; Philipp Djang

2009-01-01

97

Autonomic nervous system function in multiple sclerosis  

Microsoft Academic Search

Autonomic dysfunction causes significant disability in patients with multiple sclerosis (MS). Abnormalities of bladder, bowel and sexual function have been well documented in previous studies but cardiovascular and sudomotor autonomic changes have been less frequently reported. The present study has documented autonomic symptoms and results of cardiovascular and sudomotor autonomic function tests in 63 MS patients and correlated these changes

A. J. McDougall; J. G. McLeod

2003-01-01

98

Autonomous control of microgrids  

Microsoft Academic Search

Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take a system approach which views generation and associated loads as a subsystem or a \\

Paolo Piagi; Robert H. Lasseter

2006-01-01

99

Autonomous Computer Controlled Ice Drill.  

National Technical Information Service (NTIS)

An unmanned autonomous system, designed ultimately for air deployment, has been developed for drilling holes in the Arctic ice. The system is intended to facilitate the collection of oceanographic data in inaccessible regions of the Arctic as part of the ...

C. N. Beverly A. S. Westneat

1982-01-01

100

Towards a cooperating autonomous car  

Microsoft Academic Search

This paper describes the main challenges in engineering a cooperating autonomous car (we will refer to it as a CoopACar), presents possible approaches to the problem, and briefly describes a Cooperating Cars Simulator we are currently developing

Paulo Sousa; Paulo Ver ´ issimo

2002-01-01

101

Technique for Coordinating Autonomous Robots.  

National Technical Information Service (NTIS)

This paper describes a technique for coordinating the subsystems of autonomous robots which takes advantage of a distributed blackboard mechanism and a high degree of functional distribution between subsystems to minimize communications and simplify the i...

S. Y. Harmon W. A. Aviles D. W. Gage

1986-01-01

102

APDS: Autonomous Pathogen Detection System.  

National Technical Information Service (NTIS)

An early warning system to counter bioterrorism, the Autonomous Pathogen Detection System (APDS) continuously monitors the environment for the presence of biological pathogens (e.g., anthrax) and once detected, it sounds an alarm much like a smoke detecto...

R. G. Langlois S. Brown K. Burris B. Colston L. Jones

2002-01-01

103

Measures of Autonomic Nervous System.  

National Technical Information Service (NTIS)

Mind-body health practices aim to regulate activation of the sympathetic nervous system (SNS) to maintain homeostasis within the autonomic nervous system (ANS). The activation of the SNS is directly related to stress response, which, if persistent or prol...

D. Brown M. Bates P. Brierley-Bowers S. Sexton

2011-01-01

104

Autonomous power system brassboard  

NASA Astrophysics Data System (ADS)

The Autonomous Power System (APS) brassboard is a 20 kHz power distribution system which has been developed at NASA Lewis Research Center, Cleveland, Ohio. The brassboard exists to provide a realistic hardware platform capable of testing artificially intelligent (AI) software. The brassboard's power circuit topology is based upon a Power Distribution Control Unit (PDCU), which is a subset of an advanced development 20 kHz electrical power system (EPS) testbed, originally designed for Space Station Freedom (SSF). The APS program is designed to demonstrate the application of intelligent software as a fault detection, isolation, and recovery methodology for space power systems. This report discusses both the hardware and software elements used to construct the present configuration of the brassboard. The brassboard power components are described. These include the solid-state switches (herein referred to as switchgear), transformers, sources, and loads. Closely linked to this power portion of the brassboard is the first level of embedded control. Hardware used to implement this control and its associated software is discussed. An Ada software program, developed by Lewis Research Center's Space Station Freedom Directorate for their 20 kHz testbed, is used to control the brassboard's switchgear, as well as monitor key brassboard parameters through sensors located within these switches. The Ada code is downloaded from a PC/AT, and is resident within the 8086 microprocessor-based embedded controllers. The PC/AT is also used for smart terminal emulation, capable of controlling the switchgear as well as displaying data from them. Intelligent control is provided through use of a T1 Explorer and the Autonomous Power Expert (APEX) LISP software. Real-time load scheduling is implemented through use of a 'C' program-based scheduling engine. The methods of communication between these computers and the brassboard are explored. In order to evaluate the features of both the brassboard hardware and intelligent controlling software, fault circuits have been developed and integrated as part of the brassboard. A description of these fault circuits and their function is included. The brassboard has become an extremely useful test facility, promoting artificial intelligence (AI) applications for power distribution systems.

Merolla, Anthony

1992-10-01

105

Autonomic and Trusted Computing Paradigms  

Microsoft Academic Search

The emerging autonomic computing technology has been hailed by world-wide researchers and professionals in academia and in- dustry. Besides four key capabilities, well known as self-CHOP, we pro- pose an additional self-regulating capability to explicitly emphasize the policy-driven self-manageability and dynamic policy derivation and en- actment. Essentially, these five capabilities, coined as Self-CHROP, define an autonomic system along with other

Xiaolin Li; Hui Kang; Patrick Harrington; Johnson Thomas

2006-01-01

106

A survey of autonomic communications  

Microsoft Academic Search

Autonomic communications seek to improve the ability of network and services to cope with unpredicted change, including changes in topology, load, task, the physical and logical characteristics of the networks that can be accessed, and so forth. Broad-ranging autonomic solutions require designers to account for a range of end-to-end issues affecting programming models, network and contextual modeling and reasoning, decentralised

Simon Dobson; Spyros G. Denazis; Antonio Fernández; Dominique Gaïti; Erol Gelenbe; Fabio Massacci; Paddy Nixon; Fabrice Saffre; Nikita Schmidt; Franco Zambonelli

2006-01-01

107

The autonomous ocean profiler  

SciTech Connect

This paper describes the development and initial field test results of the Autonomous Ocean Profiler (AOP). The AOP is an oceanographic instrument platform for measuring profiles of physical, thermodynamic, and biological properties in the ocean. The profiler employs a hydrodynamic lift device to ''fly'' the instrument package up and down the water column along a taut vertical cable. Because the local currents drive the platform's vertical motion, power requirements are low, and therefore long, unattended deployments are possible. By using ARGOS or GOES satellite retrieval networks, the system can supply near real-time data. The system provides profile data at very high vertical resolution in contrast to conventional buoys, which gather data at only fixed sensor depths. Because only a single set of sensors is required to cover the vertical range desired, the system is low cost and, for many applications, expendable. The initial deployment configuration is as an Arctic drifting buoy. A satellite retransmission buoy is placed on the sea-ice surface with the cable suspended below the ice. Conductivity, temperature, and depth information are gathered over a depth range of 0 to 300 m. Data are internally recorded and relayed to the surface buoy through an inductive communications link for transmission via satellite.

Echert, D.C.; White, G.B.; Geller, E.W.; Morison, J.H.

1989-04-01

108

Autonomous mission operations  

NASA Astrophysics Data System (ADS)

NASA's Advanced Exploration Systems Autonomous Mission Operations (AMO) project conducted an empirical investigation of the impact of time delay on today's mission operations, and of the effect of processes and mission support tools designed to mitigate time-delay related impacts. Mission operation scenarios were designed for NASA's Deep Space Habitat (DSH), an analog spacecraft habitat, covering a range of activities including nominal objectives, DSH system failures, and crew medical emergencies. The scenarios were simulated at time delay values representative of Lunar (1.2-5 sec), Near Earth Object (NEO) (50 sec) and Mars (300 sec) missions. Each combination of operational scenario and time delay was tested in a Baseline configuration, designed to reflect present-day operations of the International Space Station, and a Mitigation configuration in which a variety of software tools, information displays, and crew-ground communications protocols were employed to assist both crews and Flight Control Team (FCT) members with the long-delay conditions. Preliminary findings indicate: 1) Workload of both crewmembers and FCT members generally increased along with increasing time delay. 2) Advanced procedure execution viewers, caution and warning tools, and communications protocols such as text messaging decreased the workload of both flight controllers and crew, and decreased the difficulty of coordinating activities. 3) Whereas crew workload ratings increased between 50 sec and 300 sec of time delay in the Baseline configuration, workload ratings decreased (or remained flat) in the Mitigation configuration.

Frank, J.; Spirkovska, L.; McCann, R.; Wang, Lui; Pohlkamp, K.; Morin, L.

109

Autonomous landing guidance program  

NASA Astrophysics Data System (ADS)

The Autonomous Landing Guidance program is partly funded by the US Government under the Technology Reinvestment Project. The program consortium consists of avionics and other equipment vendors, airlines and the USAF. A Sextant Avionique HUD is used to present flight symbology in cursive form as well as millimeter wave radar imagery from Lear Astronics equipment and FLIR Systems dual-channel, forward-looking, infrared imagery. All sensor imagery is presented in raster form. A future aim is to fuse all imagery data into a single presentation. Sensor testing has been accomplished in a Cessna 402 operated by the Maryland Advanced Development Laboratory. Development testing is under way in a Northwest Airlines simulator equipped with HUD and image simulation. Testing is also being carried out using United Airlines Boeing 727 and USAF C-135C (Boeing 707) test aircraft. The paper addresses the technology utilized in sensory and display systems as well as modifications made to accommodate the elements in the aircraft. Additions to the system test aircraft include global positioning systems, inertial navigation systems and extensive data collection equipment. Operational philosophy and benefits for both civil and military users are apparent. Approach procedures have been developed allowing use of Category 1 ground installations in Category 3 conditions.

Brown, John A.

1996-05-01

110

Is paramecium swimming autonomic?  

NASA Astrophysics Data System (ADS)

We seek to explore if the swimming of paramecium has an underlying autonomic mechanism. Such robotic elements may be useful in capturing the disturbance field in an environment in real time. Experimental evidence is emerging that motion control neurons of other animals may be present in paramecium as well. The limit cycle determined using analog simulation of the coupled nonlinear oscillators of olivo-cerebellar dynamics (ieee joe 33, 563-578, 2008) agrees with the tracks of the cilium of a biological paramecium. A 4-motor apparatus has been built that reproduces the kinematics of the cilium motion. The motion of the biological cilium has been analyzed and compared with the results of the finite element modeling of forces on a cilium. The modeling equates applied torque at the base of the cilium with drag, the cilium stiffness being phase dependent. A low friction pendulum apparatus with a multiplicity of electromagnetic actuators is being built for verifying the maps of the attractor basin computed using the olivo-cerebellar dynamics for different initial conditions. Sponsored by ONR 33.

Bandyopadhyay, Promode R.; Toplosky, Norman; Hansen, Joshua

2010-11-01

111

Autonomous underwater barcode recognition  

NASA Astrophysics Data System (ADS)

Wide area symbol recognition is a task that plagues many autonomous vehicles. A process is needed first to recognize if the symbol is present, and if so where it is. Once the symbol"s position is detected it must be analyzed and recognized. In this scenario we have a submersible attempting to locate man made objects on the bottom of a large water basin. These man made objects have bar codes on them that need to be read and the position of the code needs to be recorded relative to where it is in the entire pond. A two step process has been developed to allow the position recognition within a frame to be dealt with on a separate DSP associated with one of three total cameras. The object recognition is then dealt with on a high speed computer aboard the vehicle to read the proper code. The reading is done using a statistics based approach that assumes a noisy, but contrasting background. This approach has proven to be effective in environments in which the background has very little ordered noise, such as the bottom of lakes and ponds, but requires very high clarity in order to capture a suitable image.

Schulze, Karl R.

2003-11-01

112

Cooperative control for multiple autonomous UAV's searching for targets  

Microsoft Academic Search

The work presented here is in the area of decision and control for autonomous unmanned aerial vehicles (UAVs). Specifically, we formulate the problem of generating near-optimal trajectories to follow in order for several UAVs to cooperatively search for targets in a given area for which some a priori data about target distribution is available. An algorithm that utilizes a model

Flint Marios; M. Polycarpou; E. Fernandez-Gaucherand

2002-01-01

113

Autonomous Decentralized System with Event Service for Information Services  

Microsoft Academic Search

Autonomous Decentralized System (ADS) has the properties of online expansion, online maintenance and fault tolerance, which are among the important features for next generation information services. Since information services require transfer of large amounts of data with different levels of Quality of Services (QoS), it is necessary, to have an ADS architecture to satisfy these requirements. This approach uses event

Stephen S. Yau; Ning Dong; Fariaz Karim

1999-01-01

114

Feature Matching Algorithms for Machine Vision Based Autonomous Aerial Refueling  

Microsoft Academic Search

In this paper a machine vision (MV) based system is proposed as distance estimation sensor to be employed by UAVs during the operations of autonomous aerial refueling. For studying this problem it was developed a simulator featuring a 3D virtual reality (VR) interface that generates the image stream of the AAR maneuver. The proposed MV algorithm performs specific tasks as

M. L. Fravolini; V. Brunori; A. Ficola; M. La Cava; G. Campa

2006-01-01

115

An expert vision system for autonomous land vehicle road following  

Microsoft Academic Search

A production-system model of problem solving is applied to the design of a vision system by which an autonomous land vehicle (ALV) navigates roads. The ALV vision task consists of hypothesizing objects in a scene model and verifying these hypotheses using the vehicles sensors. Object hypothesis generation is based on the local navigation task, and a priori road map, and

Sven J. Dickinson; Larry S. Davis

1988-01-01

116

Model-Based Autonomous Systems in the New Millenium  

Microsoft Academic Search

A new generation of sensor rich, massively distributed, autonomous systems is being developed that has the potential for unprecedented performance, such as net- works of smart buildings, reconfigurable factories, spacecraft constellations and remote earth ecosystem monitoring. To achieve high performance these im- mobile robots will need to use their sensors to accu- rately model themselves and their environment on a

Brian C. Williams

1996-01-01

117

Optimal path planning with obstacle avoidance for autonomous surveying  

Microsoft Academic Search

In order to perform surveying with an autonomous vehicle, a path must often be designed for geometrically complex boundaries, while also accounting for mapped obstacles. In this paper, several algorithms that solve different aspects of the problem are presented. Together, the algorithms generate a path with the following characteristics: (a) it completely covers a field given its respective corner points,

David W. Hodo; David M. Bevly; John Y. Hung; Scott Millhouse; Bob Selfridge

2010-01-01

118

Control of inverter-connected sources in autonomous microgrids  

Microsoft Academic Search

The use of distributed generation is growing steadily, motivating a need for flexible interconnection strategies. The resulting microgrid concept allows sub-networks of sources and loads to maintain reliable operation when disconnected from the main grid. The paper presents a control strategy for inverter-based sources that supports transitioning between grid connection and autonomous operation. The controller regulates the inverter terminal voltage

Ian A. Hiskens; Eric M. Fleming

2008-01-01

119

Autonomic failure in neurodegenerative disorders.  

PubMed

Autonomic failure with orthostatic and postprandial hypotension, bowel and bladder disturbances, and sexual dysfunction are frequent, disabling features in patients with the three most prevalent neurodegenerative movement disorders: Parkinson's disease (PD), dementia with Lewy bodies and multiple system atrophy (MSA), and the related neurodegenerative Lewy-body disorder characterized by isolated severe autonomic failure (pure autonomic failure, PAF). All of these disorders have in common the presence of alpha-synuclein in the cytoplasmic precipitates found in neurons in Lewy body disorders or glia in MSA. Autonomic failure with disabling orthostatic hypotension is the clinical hallmark of PAF. It may also be the initial presentation of MSA, making diagnosis difficult. Within a few years, however, MSA patients develop movement disorders, which are differentiated from PD by the paucity of unilateral resting tremor, the lack of response to levodopa, and their rapidly progressive nature, resulting in disability and death in 7 to 8 years. Moderately effective treatment is available for autonomic symptoms, but management of movement disorders remains unsuccessful. Discoveries relevant to physiology and common pathological conditions were initially made in patients with autonomic failure. Meals induce profound hypotension in these patients. Conversely, commonly used nasal decongestants can produce substantial pressor effects. Even 500 mL of water can increase blood pressure by a previously unrecognized sympathetic reflex. Residual sympathetic tone is able to induce sustained supine hypertension in MSA, because it is resolved after ganglionic blockade. These phenomena were not previously recognized because of the buffering capacity of the baroreflex, but were unmasked in autonomic failure patients. PMID:15088256

Kaufmann, Horacio; Biaggioni, Italo

2003-12-01

120

Evaluation of an autonomous wind-diesel system with a dynamic battery storage.  

National Technical Information Service (NTIS)

The paper presents results from measurements on dynamic performance at Chalmers experimental wind-diesel system. Results and descriptions of control algorithms for the energy storage system, the autonomous grid, the diesel generator and the wind turbine s...

J. Linders

1989-01-01

121

Autonomous UAV persistent surveillance using bio-inspired strategies  

NASA Astrophysics Data System (ADS)

A team consisting of Teledyne Scientific Company, the University of California at Santa Barbara, the Army Research Laboratory, the Engineer Research and Development Center, and IBM UK is developing technologies in support of automated data exfiltration from heterogeneous battlefield sensor networks to enhance situational awareness for dismounts and command echelons. Unmanned aerial vehicles (UAV) provide an effective means to autonomously collect data from a sparse network of unattended ground sensors (UGSs) that cannot communicate with each other. UAVs are used to reduce the system reaction time by generating autonomous collection routes that are data-driven. Bioinspired techniques for autonomous search provide a novel strategy to detect, capture and fuse data from heterogeneous sensor networks. The bio-inspired algorithm is based on chemotaxis or the motion of bacteria seeking nutrients in their environment. Field tests of a bio-inspired system that routed UAVs were conducted in June 2011 at Camp Roberts, CA. The field test results showed that such a system can autonomously detect and locate the source of terrestrial events with very high accuracy and visually verify the event. In June 2011, field tests of the system were completed and include the use of multiple autonomously controlled UAVs, detection and disambiguation of multiple acoustic events occurring in short time frames, optimal sensor placement based on local phenomenology and the use of the International Technology Alliance (ITA) Sensor Network Fabric. The system demonstrated TRL 6 performance in the field at Camp Roberts.

Burman, Jerry; Hespanha, Joao; Madhow, Upamanyu; Isaacs, Jason; Venkateswaran, Sriram; Pham, Tien

2012-05-01

122

Autonomous movement of platinum-loaded stomatocytes  

NASA Astrophysics Data System (ADS)

Polymer stomatocytes are bowl-shaped structures of nanosize dimensions formed by the controlled deformation of polymer vesicles. The stable nanocavity and strict control of the opening are ideal for the physical entrapment of nanoparticles which, when catalytically active, can turn the stomatocyte morphology into a nanoreactor. Herein we report an approach to generate autonomous movement of the polymer stomatocytes by selectively entrapping catalytically active platinum nanoparticles within their nanocavities and subsequently using catalysis as a driving force for movement. Hydrogen peroxide is free to access the inner stomatocyte cavity, where it is decomposed by the active catalyst (the entrapped platinum nanoparticles) into oxygen and water. This generates a rapid discharge, which induces thrust and directional movement. The design of the platinum-loaded stomatocytes resembles a miniature monopropellant rocket engine, in which the controlled opening of the stomatocytes directs the expulsion of the decomposition products away from the reaction chamber (inner stomatocyte cavity).

Wilson, Daniela A.; Nolte, Roeland J. M.; van Hest, Jan C. M.

2012-04-01

123

Autonomous movement of platinum-loaded stomatocytes.  

PubMed

Polymer stomatocytes are bowl-shaped structures of nanosize dimensions formed by the controlled deformation of polymer vesicles. The stable nanocavity and strict control of the opening are ideal for the physical entrapment of nanoparticles which, when catalytically active, can turn the stomatocyte morphology into a nanoreactor. Herein we report an approach to generate autonomous movement of the polymer stomatocytes by selectively entrapping catalytically active platinum nanoparticles within their nanocavities and subsequently using catalysis as a driving force for movement. Hydrogen peroxide is free to access the inner stomatocyte cavity, where it is decomposed by the active catalyst (the entrapped platinum nanoparticles) into oxygen and water. This generates a rapid discharge, which induces thrust and directional movement. The design of the platinum-loaded stomatocytes resembles a miniature monopropellant rocket engine, in which the controlled opening of the stomatocytes directs the expulsion of the decomposition products away from the reaction chamber (inner stomatocyte cavity). PMID:22437710

Wilson, Daniela A; Nolte, Roeland J M; van Hest, Jan C M

2012-02-26

124

Miniature Autonomous Robotic Vehicle (MARV)  

SciTech Connect

Sandia National Laboratories (SNL) has recently developed a 16 cm{sup 3} (1 in{sup 3}) autonomous robotic vehicle which is capable of tracking a single conducting wire carrying a 96 kHz signal. This vehicle was developed to assess the limiting factors in using commercial technology to build miniature autonomous vehicles. Particular attention was paid to the design of the control system to search out the wire, track it, and recover if the wire was lost. This paper describes the test vehicle and the control analysis. Presented in the paper are the vehicle model, control laws, a stability analysis, simulation studies and experimental results.

Feddema, J.T.; Kwok, K.S.; Driessen, B.J.; Spletzer, B.L.; Weber, T.M.

1996-12-31

125

Autonomic Modulation of Olfactory Signaling  

NSDL National Science Digital Library

The olfactory epithelium is extensively innervated by sympathetic nerve endings, which release norepinephrine, and parasympathetic nerve endings, which release acetylcholine. Because olfactory sensory neurons have adrenergic and muscarinic receptors in addition to odorant receptors, autonomic stimulation can modulate the responses of olfactory sensory neurons to odorants. Recent studies have shed light on the molecular mechanisms that underlie crosstalk between muscarinic and odorant receptor signaling. The emerging view is that the stimulation of odorant receptor signaling by odorants, which is the earliest step in olfaction, can be substantially regulated by the autonomic nervous system.

Randy A. Hall (Emory University School of Medicine;Department of Pharmacology REV)

2011-01-11

126

Classification and Enumeration of Autonomous Sequential Machines.  

National Technical Information Service (NTIS)

A study is reported of the structure of the state transition graphs of autonomous sequential machines. (An autonomous sequential machine can be viewed as an isolated, discrete information processing system). The structural properties of the graphs are for...

H. F. Ryan

1967-01-01

127

Autonomous Robotic Following Using Vision Based Techniques.  

National Technical Information Service (NTIS)

The Intelligent Systems And Autonomous Controls (ISAAC) robot is an experimental autonomous research platform being developed to advance current dismount following applications. Specifically, vision based following using pedestrian detection. The current ...

R. T. Kania P. A. Frederick M. Del Rose

2006-01-01

128

Autonomous Robotic Following Using Vision Based Techniques.  

National Technical Information Service (NTIS)

The Intelligent Systems And Autonomous Controls (ISAAC) robot is an experimental autonomous research platform being developed to advance current dismount following applications. Specifically, vision based following using pedestrian detection. The current ...

R. T. Kania M. Del Rose

2005-01-01

129

Autonomic Function Tests: Some Clinical Applications  

PubMed Central

Modern autonomic function tests can non-invasively evaluate the severity and distribution of autonomic failure. They have sufficient sensitivity to detect even subclinical dysautonomia. Standard laboratory testing evaluates cardiovagal, sudomotor and adrenergic autonomic functions. Cardiovagal function is typically evaluated by testing heart rate response to deep breathing at a defined rate and to the Valsalva maneuver. Sudomotor function can be evaluated with the quantitative sudomotor axon reflex test and the thermoregulatory sweat test. Adrenergic function is evaluated by the blood pressure and heart rate responses to the Valsalva maneuver and to head-up tilt. Tests are useful in defining the presence of autonomic failure, their natural history, and response to treatment. They can also define patterns of dysautonomia that are useful in helping the clinician diagnose certain autonomic conditions. For example, the tests are useful in the diagnosis of the autonomic neuropathies and distal small fiber neuropathy. The autonomic neuropathies (such as those due to diabetes or amyloidosis) are characterized by severe generalized autonomic failure. Distal small fiber neuropathy is characterized by an absence of autonomic failure except for distal sudomotor failure. Selective autonomic failure (which only one system is affected) can be diagnosed by autonomic testing. An example is chronic idiopathic anhidrosis, where only sudomotor function is affected. Among the synucleinopathies, autonomic function tests can distinguish Parkinson's disease (PD) from multiple system atrophy (MSA). There is a gradation of autonomic failure. PD is characterized by mild autonomic failure and a length-dependent pattern of sudomotor involvement. MSA and pure autonomic failure have severe generalized autonomic failure while DLB is intermediate.

Tomalia, Victoria A.; Park, Ki-Jong

2013-01-01

130

Autonomic function tests: some clinical applications.  

PubMed

Modern autonomic function tests can non-invasively evaluate the severity and distribution of autonomic failure. They have sufficient sensitivity to detect even subclinical dysautonomia. Standard laboratory testing evaluates cardiovagal, sudomotor and adrenergic autonomic functions. Cardiovagal function is typically evaluated by testing heart rate response to deep breathing at a defined rate and to the Valsalva maneuver. Sudomotor function can be evaluated with the quantitative sudomotor axon reflex test and the thermoregulatory sweat test. Adrenergic function is evaluated by the blood pressure and heart rate responses to the Valsalva maneuver and to head-up tilt. Tests are useful in defining the presence of autonomic failure, their natural history, and response to treatment. They can also define patterns of dysautonomia that are useful in helping the clinician diagnose certain autonomic conditions. For example, the tests are useful in the diagnosis of the autonomic neuropathies and distal small fiber neuropathy. The autonomic neuropathies (such as those due to diabetes or amyloidosis) are characterized by severe generalized autonomic failure. Distal small fiber neuropathy is characterized by an absence of autonomic failure except for distal sudomotor failure. Selective autonomic failure (which only one system is affected) can be diagnosed by autonomic testing. An example is chronic idiopathic anhidrosis, where only sudomotor function is affected. Among the synucleinopathies, autonomic function tests can distinguish Parkinson's disease (PD) from multiple system atrophy (MSA). There is a gradation of autonomic failure. PD is characterized by mild autonomic failure and a length-dependent pattern of sudomotor involvement. MSA and pure autonomic failure have severe generalized autonomic failure while DLB is intermediate. PMID:23346153

Low, Phillip A; Tomalia, Victoria A; Park, Ki-Jong

2013-01-03

131

Lateral Path Controller Design for Autonomous Airship  

Microsoft Academic Search

According to the path control problem for unmanned autonomous airship, the lateral path mathematic model was introduced based on the scheme of control system and a kind of lateral path design method of autonomous airship is proposed based on fuzzy logic and adaptive sliding mode control (ASMC). The movement model and dynamic model of autonomous airship is derived from considering

Guo Jian-guo; Zhou Jun

2010-01-01

132

Autonomous object identification in mine countermeasure missions  

Microsoft Academic Search

In this paper we present a planning algorithm for identification missions in an autonomous mine countermeasure scenario using AUVs. The concept of autonomous MCM identification missions is to first perform an autonomous survey of the mission area, during which an automatic target recognition (ATR) algorithm is run on the collected side-scan data. The ATR software detects possible contacts in the

Thomas R. Krogstad; Martin Wiig; Patrick Cleophas; Oivind Midtgaard

2011-01-01

133

A SemiAutonomous Reactive Control Architecture  

Microsoft Academic Search

This paper presents a novel intelligent control architecture for semi-autonomous systems. A semi-autonomous system is defined here as that autonomous system (machine) which interacts intelligently with a human user (collaborator) who might command, modify, or override its behavior. This work has been motivated by the need for a control architecture that can interact with human users of different perceptual and

Karim A. Tahboub

2001-01-01

134

An Autonomous Control Concept for Production Logistics  

Microsoft Academic Search

The German Collaborative Research Centre 637 'Autonomous Cooperating Logistic Processes' tries to make a paradigm shift from central planning to autonomous control in the field of logistics. Among other things, autonomous routing algorithms based on internet routing protocols are developed. The Distributed Logistics Routing Protocol (DLRP) was originally designed for transport networks to match goods and vehicles and to continuously

Henning Rekersbrink; Bernd Scholz-Reiter; Christian Zabel

2010-01-01

135

Autonomous Agent Navigation Based on Textural Analysis  

Microsoft Academic Search

Navigating an autonomous agent outdoors can be a challenging task. As a basis for this research, the autonomous agent in question is that of an autonomous robotic lawnmower. Mowing a lawn can be a difficult, tedious, and sometimes hazardous chore for the human operator. The goal of this paper is to report on ongoing research of using the visual property

Rand C. Chandler; A. A. Arroyo; M. Nechyba; E. M. Schwartz

2002-01-01

136

The EO1 Autonomous Science Agent  

Microsoft Academic Search

An Autonomous Science Agent is currently flying onboard the Earth Observing One Spacecraft. This software enables the spacecraft to autonomously detect and respond to science events occurring on the Earth. The package includes software systems that perform science data analysis, deliberative planning, and run-time robust execution. Because of the deployment to a remote spacecraft, this Autonomous Science Agent has stringent

Steve A. Chien; Rob Sherwood; Daniel Tran; Benjamin Cichy; Gregg Rabideau; Rebecca Castano; Ashley Davies; Rachel Lee; Dan Mandl; Stuart Frye; Bruce Trout; Jerry Hengemihle; Jeff D'Agostino; Seth Shulman; Stephen Ungar; Thomas Brakke; Darrell Boyer; Jim Van Gaasbeck; Ronald Greeley; Thomas Doggett; Victor R. Baker; James M. Dohm; Felipe Ip

2004-01-01

137

The EO1 autonomous science agent  

Microsoft Academic Search

An Autonomous Science Agent is currently flying onboard the Earth Observing One Spacecraft. This software enables the spacecraft to autonomously detect and respond to science events occurring on the Earth. The package includes software systems that perform science data analysis, deliberative planning, and run-time robust execution. Because of the deployment to a remote spacecraft, this Autonomous Science Agent has stringent

Steve Chien; Rob Sherwood; Daniel Tran; Benjamin Cichy; Gregg Rabideau; Rebecca Castano; Ashley Davies; Rachel Lee; Dan Mandl; Stuart Frye; Bruce Trout; Jerry Hengemihle; J. D'Agostino; S. Shulman; S. Ungar; T. Brakke; D. Boyer; J. Van Gaasbeck; R. Greeley; T. Doggett; V. Baker; J. Dohm; F. Ip

2004-01-01

138

Autonomous computer controlled ice drill  

Microsoft Academic Search

An unmanned autonomous system, designed ultimately for air deployment, has been developed for drilling holes In the Arctic Ice. The system is intended to facilitate the collection of oceanographic date in inaccessible regions of the Arctic as part of the Air Deployed Oceanographic Mooring (ADOM) program. This paper describes the design of the drill, the microcomputer control system, and the

C. Beverly; A. Westneat

1982-01-01

139

Simulated Visual Perception for Autonomous  

Microsoft Academic Search

As the number of robots in the world increases, from automatic vacuum cleaners, to toy robot dogs, to autonomous vehicles for the military, the need for effective algorithms to control these agents is becoming increasingly more important. Conventional path finding techniques have relied on having a representation of the world that could be analysed mathematically to find the best path.

Daniel Flower; Burkhard Wünsche; Werner Guesgen

140

APDS: Autonomous Pathogen Detection System  

Microsoft Academic Search

An early warning system to counter bioterrorism, the Autonomous Pathogen Detection System (APDS) continuously monitors the environment for the presence of biological pathogens (e.g., anthrax) and once detected, it sounds an alarm much like a smoke detector warns of a fire. Long before September 11, 2001, this system was being developed to protect domestic venues and events including performing arts

R G Langlois; S Brown; L Burris; B Colston; L Jones; T Makarewicz; R Mariella; D Masquelier; M McBride; F Milanovich; S Masarabadi; K Venkateswaran; G Marshall; D Olson; D Wolcott

2002-01-01

141

Autonomous Behavior of Computational Agents  

Microsoft Academic Search

In this paper we present an architecture for decision making of software agents that allows the agent to be-have autonomously. Our target area is computational agents — encapsulating various neural networks, genetic algorithms, and similar methods — that are expected to solve problems of different nature within an environment of a hybrid computational multi-agent system. The architecture is based on

Roman Vaculín; Roman Neruda

142

Autonomic Computing in SQL Server  

Microsoft Academic Search

With the growing size of enterprise data, the task of managing a database is becoming more and more complex as well as time-consuming. A database administrator spends most of his time in activities that can be made automatic. Also, scarcity of skilled database administrators have motivated the database industry to develop autonomic database management systems (ADBMS) which can alleviate many

Abdul Mateen; Basit Raza; Tauqeer Hussain; Mian M. Awais

2008-01-01

143

Neural control of autonomous vehicles  

Microsoft Academic Search

Lateral control of an autonomous road vehicle by a neural network is presented. The inputs into the controller such as relative vehicle position and yaw angle are delivered by dynamical video scene processing. Nonlinear conflicting requirements of safety and comfort have to be satisfied by the controller. The controller has been trained by the model-based training algorithm. In contrast to

Klaus Mecklenburg; Tomas Hrycej; Uwe Franke; Hans Fritz

1992-01-01

144

The Functioning of Autonomous Colleges  

ERIC Educational Resources Information Center

The college gets separated from the university, though not completely, when it is an autonomous college, which is practice in India. Academic package will become flexible and the decision-making is internalized, changes and updating could be easily carried out, depending on the need as reflected from the feedback taken from alumni, user sectors,…

Rao, V. Pala Prasada; Rao, Digumarti Bhaskara

2012-01-01

145

A Power Autonomous Monopedal Robot  

Microsoft Academic Search

We present the design and initial results of a power-autonomous planar monopedal robot. The robot is a gasoline powered, two degree of freedom robot that runs in a circle, constrained by a boom. The robot uses hydraulic Series Elastic Actuators, force-controllable actuators which provide high force fidelity, moderate bandwidth, and low impedance. The actuators are mounted in the body of

Benjamin T. Krupp; Jerry E. Pratt

146

ISS Update: Autonomous Mission Operations  

NASA Video Gallery

NASA Public Affairs Officer Brandi Dean interviews Jeff Mauldin, Simulation Supervisor for Autonomous Mission Operations at Johnson Space Center in Houston, Texas. Ask us on Twitter @NASA_Johnson and include the hashtag #askStation. For the latest news about the space station, visit http://www.nasa.gov/station.

Russell Todd D

2012-06-15

147

Autonomic energy management in clusters  

Microsoft Academic Search

Nowadays, computer clusters are widely used in many areas (scientific computing, commercial web servers, databases, etc). Energy management in such infrastructures is becoming increasingly important as their energy consumption is continuing to raise. In this paper, we report on our experiments in using an autonomic management system to provide energy aware management in a cluster. We improve energy management by

Aeiman Gadafi; Alain Tchana; Daniel Hagimont; Laurent Broto

2010-01-01

148

From smart to autonomous phones  

Microsoft Academic Search

As smart phones offer more options, driving new applications development, we need to establish appropriate new standards. Here, we review existing related standards, focusing on two missing features that fully autonomous phones will require. The common Java standard for building enterprise class applications is the Java 2 platform, Enterprise Edition. J2EE supports a rich set of APIs, and many vendors

N. Islam

2004-01-01

149

An Autonomous Seafloor Recording Capsule  

Microsoft Academic Search

The need for a general purpose, seafloor mounted oceanographic recording package has prompted the development of an instrument capable of long-term autonomous data acquisition. An electronics package is described that contains a microprocessor-based data acquisition and storage system. The flexible nature of the electronics design allows for the inclusion of several appropriate kinds of mass storage including both disk and

R. Currier; R. Harriss; C. Nickles; W. Hodgkiss

1991-01-01

150

Autonomous rendezvous in elliptical orbits  

Microsoft Academic Search

An important feature of the autonomous terminal rendezvous of spacecraft in an elliptical orbit is a periodic motion (limit cycle) in the system variables. Unstable limit cycle involves an instability of the system. This paper addresses a mathematical model of the system, a range rate control algorithm, a numerical iterative method for computing the limit cycle, its stability and domain

Y. Shaohua

1997-01-01

151

Autonomic Computing: Freedom or a Threat?  

SciTech Connect

No longer is the question whether autonomic computing will gain general acceptance but when. Experts expect autonomic computing to be widely used within 10 years. When it does become mainstream, how will autonomics change system administration and corporations, and will the change be for better or worse? The answer depends on how well we anticipate the limitations of what autonomic systems are suited to do, whether we can collectively address the vulnerabilities of autonomic approaches as we draw upon the advantages, and whether administrators, companies, partners, and users are prepared for the transition. This article presents some design considerations to address the first two issues and some suggested survival techniques for the third.

Fink, Glenn A.; Frincke, Deb

2007-12-01

152

Design of an autonomous amphibious robot for surf zone operations: part II - hardware, control implementation and simulation  

Microsoft Academic Search

This paper describes a work at The Naval Postgraduate School (NPS) and Case Western Reserve University (CWRU) to create an autonomous highly mobile amphibious robot. A first generation land-based prototype has been constructed and field tested. This robot design, based on a tracked element, is capable of autonomous waypoint navigation, self-orientation, obstacle avoidance, and has the capacity to transmit sensor

Richard Harkins; Jason Ward; Ravi Vaidyanathan; Alexander S. Boxerbaum; Roger D. Quinn

2005-01-01

153

Autonomous control integrating fast voltage regulation and islanding detection for high penetration PV application  

Microsoft Academic Search

Distributed renewable energy generation offers unique advantages compared with large fossil-fuel power plants. These advantages include higher efficiency, increased reliability and less pollution. However, renewable generation will cause adverse impact on the distribution system because of the stochastic generation feature. System voltage problem and unintentional islanding are two impediments to further increase the penetration level of renewable resources. An autonomous

Yan Zhou; Liming Liu; Hui Li

2011-01-01

154

Experiences in Benchmarking of Autonomic Systems  

NASA Astrophysics Data System (ADS)

Autonomic computing promises improvements of systems quality of service in terms of availability, reliability, performance, security, etc. However, little research and experimental results have so far demonstrated this assertion, nor provided proof of the return on investment stemming from the efforts that introducing autonomic features requires. Existing works in the area of benchmarking of autonomic systems can be characterized by their qualitative and fragmented approaches. Still a crucial need is to provide generic (i.e. independent from business, technology, architecture and implementation choices) autonomic computing benchmarking tools for evaluating and/or comparing autonomic systems from a technical and, ultimately, an economical point of view. This article introduces a methodology and a process for defining and evaluating factors, criteria and metrics in order to qualitatively and quantitatively assess autonomic features in computing systems. It also discusses associated experimental results on three different autonomic systems.

Etchevers, Xavier; Coupaye, Thierry; Vachet, Guy

155

Autonomous magnetic node for wireless sensor networks  

NASA Astrophysics Data System (ADS)

Quantum Magnetics has developed an autonomous battery-powered magnetic sensor node for distributed wireless sensor networks. The device digitizes the sensor output signals and transmits data over an RF link using a ZigBee 802.15.4 protocol. The prototype node incorporates Magneto-Resistive (MR) chips configured to measure all three components of the magnetic field, a logic device, analog-to-digital converters, a two-axis tilt sensor, a wireless transceiver, and a set of batteries. For use in outdoor environments, the sensor node is also GPS-ready. At present, the unit measures approximately 4 inches on a side, with about 40% of the volume occupied by the batteries. Using battery power, the node can operate for about 10 hours in a continuous mode and up to 40 hours with a 10% duty cycle. Efforts are underway to develop the next-generation magnetic node with significant reduction in size and part count.

Dalichaouch, Yacine; Shelby, Richard A.; Trammell, Hoke S.; Mathis, Kevin

2004-11-01

156

Autonomic neuropathy in Fabry disease: a prospective study using the Autonomic Symptom Profile and cardiovascular autonomic function tests  

PubMed Central

Background Fabry patients have symptoms and signs compatible with autonomic dysfunction. These symptoms and signs are considered to be due to impairment of the peripheral nervous system, but findings indicative of autonomic neuropathy in other diseases, such as orthostatic intolerance and male sexual dysfunction, are infrequently reported in Fabry disease. The aim of our study was to investigate autonomic symptoms and cardiovascular autonomic function in a large cohort of male and female Fabry patients. Methods Forty-eight Fabry patients (15 male, 30 treated with enzyme replacement therapy) and 48 sex- and age-matched controls completed a questionnaire on autonomic symptoms (the Autonomic Symptom Profile). Thirty-six Fabry patients underwent cardiovascular function tests. Results The Autonomic Symptom Profile revealed a significantly higher sum score in Fabry patients than in healthy control subjects (22 versus 12), but a relatively low score compared to patients with proven autonomic neuropathy. Fabry patients scored worse than healthy controls in the orthostatic intolerance domain. Scores in the male sexual dysfunction domain were comparable between healthy controls and male Fabry patients. The cardiovascular autonomic function tests revealed only mild abnormalities in seven patients. None of these seven patients showed more than one abnormal test result. Enzyme replacement therapy was not associated with less severe disease, lower ASP scores or less frequent abnormal cardiovascular function test results. Conclusions Male sexual function and autonomic control of the cardiovascular system are nearly normal in Fabry patients, which cast doubt on the general accepted assumption that autonomic neuropathy is the main cause of symptoms and signs compatible with autonomic dysfunction in Fabry disease. Possibly, end-organ damage plays a key role in the development of symptoms and signs in Fabry patients. An exceptional kind of autonomic neuropathy is another but less likely explanation.

2010-01-01

157

Central control of autonomic function and involvement in neurodegenerative disorders.  

PubMed

The central autonomic network includes the insular cortex, anterior cingulate cortex, amygdala, hypothalamus, periaqueductal gray, parabrachial nucleus, nucleus of the solitary tract, ventrolateral reticular formation of the medulla, and medullary raphe. These areas: are reciprocally interconnected; receive converging visceral and somatosensory information; generate stimulus-specific patterns of autonomic, endocrine, and motor responses; and are regulated according to the behavioral state, including the sleep-wake cycle. Several components of the central autonomic networks are affected in neurodegenerative disorders characterized by the presence of intracellular inclusions containing ?-synuclein. These include multiple system atrophy (MSA), characterized by accumulation of glial cytoplasmic inclusions, and Lewy body disorders, including Parkinson disease (PD), dementia with Lewy bodies, and the so-called "pure" autonomic failure. In MSA, involvement of the rostral ventrolateral medulla may be primarily responsible for orthostatic hypotension; involvement in the pontine micturition area, sacral preganglionic nucleus, and Onuf nucleus is responsible for neurogenic bladder; and involvement of the pre-Bötzinger complex and medullary raphe may contribute to sleep-related respiratory abnormalities. In contrast, Lewy body disorders are characterized by early involvement of the enteric nervous system and cardiac sympathetic ganglia. The dorsal motor nucleus of the vagus is affected both in MSA and at early stages of PD. PMID:24095115

Cersosimo, Maria G; Benarroch, Eduardo E

2013-01-01

158

Autonomous robotic operations for on-orbit satellite servicing  

NASA Astrophysics Data System (ADS)

The Orbital Express Demonstration System (OEDS) flight test successfully demonstrated technologies required to autonomously service satellites on-orbit. The mission's integrated robotics solution, the Orbital Express Demonstration Manipulator System (OEDMS) developed by MDA, performed critical flight test operations. The OEDMS comprised a six-jointed robotic manipulator arm and its avionics, non-proprietary servicing and ORU (Orbital Replacement Unit) interfaces, a vision and arm control system for autonomous satellite capture, and a suite of Ground Segment and Flight Segment software allowing script generation and execution under supervised or full autonomy. The arm was mounted on ASTRO, the servicer spacecraft developed by Boeing. The NextSat, developed by Ball Aerospace, served as the client satellite. The OEDMS demonstrated two key goals of the OEDS flight test: autonomous free-flyer capture and berthing of a client satellite, and autonomous transfer of ORUs from servicer to client and back. The paper provides a description of the OEDMS and the key operations it performed.

Ogilvie, Andrew; Allport, Justin; Hannah, Michael; Lymer, John

2008-05-01

159

Autonomous zinc-finger nuclease pairs for targeted chromosomal deletion.  

PubMed

Zinc-finger nucleases (ZFNs) have been successfully used for rational genome engineering in a variety of cell types and organisms. ZFNs consist of a non-specific FokI endonuclease domain and a specific zinc-finger DNA-binding domain. Because the catalytic domain must dimerize to become active, two ZFN subunits are typically assembled at the cleavage site. The generation of obligate heterodimeric ZFNs was shown to significantly reduce ZFN-associated cytotoxicity in single-site genome editing strategies. To further expand the application range of ZFNs, we employed a combination of in silico protein modeling, in vitro cleavage assays, and in vivo recombination assays to identify autonomous ZFN pairs that lack cross-reactivity between each other. In the context of ZFNs designed to recognize two adjacent sites in the human HOXB13 locus, we demonstrate that two autonomous ZFN pairs can be directed simultaneously to two different sites to induce a chromosomal deletion in ? 10% of alleles. Notably, the autonomous ZFN pair induced a targeted chromosomal deletion with the same efficacy as previously published obligate heterodimeric ZFNs but with significantly less toxicity. These results demonstrate that autonomous ZFNs will prove useful in targeted genome engineering approaches wherever an application requires the expression of two distinct ZFN pairs. PMID:20716517

Söllü, Cem; Pars, Kaweh; Cornu, Tatjana I; Thibodeau-Beganny, Stacey; Maeder, Morgan L; Joung, J Keith; Heilbronn, Regine; Cathomen, Toni

2010-08-16

160

Experiments on autonomous Boolean networks  

NASA Astrophysics Data System (ADS)

We realize autonomous Boolean networks by using logic gates in their autonomous mode of operation on a field-programmable gate array. This allows us to implement time-continuous systems with complex dynamical behaviors that can be conveniently interconnected into large-scale networks with flexible topologies that consist of time-delay links and a large number of nodes. We demonstrate how we realize networks with periodic, chaotic, and excitable dynamics and study their properties. Field-programmable gate arrays define a new experimental paradigm that holds great potential to test a large body of theoretical results on the dynamics of complex networks, which has been beyond reach of traditional experimental approaches.

Rosin, David P.; Rontani, Damien; Gauthier, Daniel J.; Schöll, Eckehard

2013-06-01

161

Autonomous behavior control architecture of entertainment humanoid robot SDR4X  

Microsoft Academic Search

In this paper we describe the autonomous behavior control architecture of SDR-4X, which serves to integrate multi-modal recognition and motion control technologies. We overview the entire software architecture of SDR-4X, which is composed of perception, short and long term memory, behavior control, and motion control parts. Regarding autonomous behavior control, we further focus on issues such as spontaneous behavior generation

Masahiro Fujita; Yoshihiro Kuroki; Tatsuzo Ishida; Toshi T. Doi

2003-01-01

162

Parallel Operation of DFIGs in Three-Phase Four-Wire Autonomous Wind Energy Conversion System  

Microsoft Academic Search

This paper deals with a control algorithm for two parallel-operated doubly fed induction generators (DFIGs) driven by wind turbines in a three-phase four-wire autonomous system feeding local loads. The proposed autonomous wind energy conversion system (AWECS) is using back-to-back-connected pulsewidth-modulated insulated-gate-bipolar-transistor-based voltage source converters with a battery energy storage system at their dc link. The system utilizes separate rotor-side converters

Puneet K. Goel; Bhim Singh; S. S. Murthy; Navin Kishore

2011-01-01

163

Autonomous Robotic Vehicle Road Following  

Microsoft Academic Search

A description is given of the system architecture of an autonomous vehicle and its real-time adaptive vision system for road-following. The vehicle is a 10-ton armored personnel carrier modified for robotic control. A color transformation that best discriminates road and nonroad regions is derived from labeled data samples. A maximum-likelihood pixel classification technique is then used to classify pixels in

Darwin T. Kuan; Gary Phipps; A.-CHUAN HSUEH

1988-01-01

164

Autonomic Computing - Panacea or Poppycock?  

Microsoft Academic Search

Autonomic computing arose out of a need for a means to cope with rapidly growing complexity of integrating, managing, and operating computer-based systems as well as a need to reduce the total cost of ownership of today's systems. The vision is to create selfware through self-* properties. The initial set of properties, in terms of objectives, were self-configuring, self-healing, self-optimizing

Roy Sterritt; Michael G. Hinchey

2005-01-01

165

Autonomous Optimization of Business Processes  

Microsoft Academic Search

\\u000a In this paper we introduce the intelligent Executable Product Model (iEPM) approach for the autonomous optimization of service\\u000a industry’s business processes. Instead of using a process model, we use an Executable Product Model (EPM). EPMs provide a\\u000a compact representation of the set of possible execution paths of a business process by defining information dependencies instead\\u000a of the order of activities.

Markus Kress; Detlef Seese

2009-01-01

166

Creating adaptive affective autonomous NPCs  

Microsoft Academic Search

The paper reports work to create believable autonomous Non Player Characters in Video games in general and educational role\\u000a play games in particular. It aims to increase their ability to respond appropriately to the player’s actions both cognitively\\u000a and emotionally by integrating two models: the cognitive appraisal-based FAtiMA architecture, and the drives-based PSI model.\\u000a We discuss the modelling of adaptive

Mei Yii Lim; João Dias; Ruth Aylett; Ana Paiva

167

Probabilistic State Estimation Techniques for Autonomous and Decision Support Systems  

Microsoft Academic Search

One of the ultimate goals of the field of artificial intelligence and robotics is to develop systems that assist us in our\\u000a everyday lives by autonomously carrying out a variety of different tasks. To achieve this and to generate appropriate actions,\\u000a such systems need to be able to accurately interpret their sensory input and estimate their state or the state

Wolfram Burgard; Dieter Fox; Sebastian Thrun

168

EMS-Vision: a perceptual system for autonomous vehicles  

Microsoft Academic Search

The paper gives a survey on the new Expectation- based Multifocal Saccadic Vision (EMS-Vision) system for autonomous vehicle guidance developed at the Universität der Bundeswehr München (UBM). EMS-Vision is the third generation dynamic vision system following the 4-D approach. Its core element is a new camera arrangement, mounted on a high bandwidth pan-tilt head for active gaze control. Central knowledge

Rudolf Gregor; Michael Lützeler; Martin Pellkofer; K.-H. Siedersberger; Ernst Dieter Dickmanns

2002-01-01

169

Depolymerization-powered autonomous motors using biocompatible fuel.  

PubMed

We report the design of autonomous motors powered by the rapid depolymerization reaction of poly(2-ethyl cyanoacrylate) (PECA), an FDA-approved polymer. Motors were fabricated in two different length scales, 3 cm and 300 ?m. The motion of the motors is induced by self-generated surface tension gradients along their bodies. The motors are capable of moving in various media, including salt solutions and artificial serum. PMID:24094034

Zhang, Hua; Duan, Wentao; Liu, Lei; Sen, Ayusman

2013-10-08

170

Inet: Internet Topology Generator  

Microsoft Academic Search

Network research often involves the evaluation of new application designs, system architectures, and protocol implementations. Due to the immense scale of the Internet, deploying an Internet-wide system for the purpose of experimental study is nearly impossible. Instead, researchers evaluate their designs using generated random network topologies. In this report, we present a topology generator that is based on Autonomous System

Cheng Jin; Qian Chen; Sugih Jamin

2000-01-01

171

Autonomic Networking in Wireless Sensor Networks  

Microsoft Academic Search

In this chapter, we address autonomic networking in termsof wireless sensor networks (WSNs), a typical example of wirelessnetworks\\u000a in pervasive computing. In order to investigate the stateof the art of autonomic networking in sensor networks and its futureprospects,\\u000a we start with a short summary of autonomic networking andSensor networks. It follows the discussion of the appliance ofautonomic\\u000a networking in WSNs

Mengjie Yu; Hala Mokhtar; Madjid Merabti

172

Characterizing maintainability concerns in autonomic element design  

Microsoft Academic Search

Autonomic computing has become more prevalent in recent years for its vision of developing applications with self-adaptive and self-managing behavior. Due to the inherent complexity of such applications and the nature of the built-in closed-loop feedback control, maintainability issues of autonomic systems are emerging as significant concerns in autonomic system designs. This paper identifies and categorizes types of common forms

Qin Zhu; Lei Lin; Holger M. Kienle; Hausi A. Müller

2008-01-01

173

The EO1 Autonomous Science Agent  

Microsoft Academic Search

Abstract— An Autonomous ,Science Agent is currently flying onboard ,the Earth Observing One Spacecraft. This software enables the spacecraft to autonomously,detect and respond,to science ,events occurring on the ,Earth. The package includes software systems that perform science data analysis, deliberative planning, and run-time robust execution. Because ,of the ,deployment ,to a ,remote spacecraft, this Autonomous Science Agent has stringent constraints

S. Chien; R. Sherwood; D. Tran; B. Cichy; G. Rabideau; R. Castano; A. Davies; R. Lee; D. Mandl; S. Frye; B. Trout; J. Hengemihle; S. Shulman Agostino; S. Ungar; T. Brakke; D. Boyer; J. Vangaasbeck; R. Greeley; T. Doggett; V. Baker; J. Dohm; F. Ip

2005-01-01

174

Spirituality and Autonomic Cardiac Control  

Microsoft Academic Search

Background  Spirituality has been suggested to be associated with positive health, but potential biological mediators have not been well\\u000a characterized.\\u000a \\u000a \\u000a \\u000a Purpose and Methods  The present study examined, in a population-based sample of middle-aged and older adults, the potential relationship between\\u000a spirituality and patterns of cardiac autonomic control, which may have health significance. Measures of parasympathetic (high-frequency\\u000a heart rate variability) and sympathetic (pre-ejection

Gary G. Berntson; Greg J. Norman; Louise C. Hawkley; John T. Cacioppo

2008-01-01

175

Artificial Intelligence in Autonomous Telescopes  

NASA Astrophysics Data System (ADS)

Artificial Intelligence (AI) is key to the natural evolution of today's automated telescopes to fully autonomous systems. Based on its rapid development over the past five decades, AI offers numerous, well-tested techniques for knowledge based decision making essential for real-time telescope monitoring and control, with minimal - and eventually no - human intervention. We present three applications of AI developed at CFHT for monitoring instantaneous sky conditions, assessing quality of imaging data, and a prototype for scheduling observations in real-time. Closely complementing the current remote operations at CFHT, we foresee further development of these methods and full integration in the near future.

Mahoney, William; Thanjavur, Karun

2011-03-01

176

BLAST autonomous daytime star cameras  

NASA Astrophysics Data System (ADS)

We have developed two redundant daytime star cameras to provide the fine pointing solution for the balloon-borne submillimeter telescope, BLAST. The cameras are capable of providing a reconstructed pointing solution with an absolute accuracy < 5". They are sensitive to stars down to magnitudes ~ 9 in daytime float conditions. Each camera combines a 1 megapixel CCD with a 200mm f/2 lens to image a 2° × 2.5° field of the sky. The instruments are autonomous. An internal computer controls the temperature, adjusts the focus, and determines a real-time pointing solution at 1 Hz. The mechanical details and flight performance of these instruments are presented.

Rex, Marie; Chapin, Edward; Devlin, Mark J.; Gundersen, Joshua; Klein, Jeff; Pascale, Enzo; Wiebe, Donald

2006-07-01

177

3D flyable curves for an autonomous aircraft  

NASA Astrophysics Data System (ADS)

The process of conducting a mission for an autonomous aircraft includes determining the set of waypoints (flight planning) and the path for the aircraft to fly (path planning). The autonomous aircraft is an under-actuated system, having less control inputs than degrees of freedom and has two nonholonomic (non integrable) kinematic constraints. Consequently, the set of feasible trajectories will be restricted and the problem of trajectory generation becomes more complicated than a simple interpolation. Care must be taken in the selection of the basic primitives to respect the kinematic and dynamic limitations. The topic of this paper is trajectory generation using parametric curves. The problem can be formulated as follows: to lead the autonomous aircraft from an initial configuration qi to a final configuration qf in the absence of obstacles, find a trajectory q(t) for 0 <=t <= T. The trajectory can be broken down into a geometric path q(s), s being the curvilinear abscissa and s=s(t) a temporal function. In 2D the curves fall into two categories: • Curves whose coordinates have a closed form expressions, for example B-splines, quintic polynomials or polar splines. • Curves whose curvature is a function of their arc length for example clothoids, cubic spirals, quintic or intrinsic splines. Some 3D solutions will be presented in this paper and their effectiveness discussed towards the problem in hand.

Bestaoui, Yasmina

2012-11-01

178

Autonomous replication of human chromosomal DNA fragments in human cells.  

PubMed Central

We have examined whether a human chromosome has distinct segments that can replicate autonomously as extrachromosomal elements. Human 293S cells were transfected with a set of human chromosomal DNA fragments of 8-15 kilobase pairs that were cloned on an Escherichia coli plasmid vector. The transfected cells were subsequently cultured in the presence of 5-bromodeoxyuridine during two cell generations, and several plasmid clones labeled in both of the daughter DNA strands were isolated. Efficiency of replication of these clones, as determined from the ratios of heavy-heavy and one-half of heavy-light molecules to total molecules recovered from density-labeled cells, was 9.4% per cell generation on the average. Replication efficiency of control clones excluded during the selection was about 2.2% and that of the vector plasmid alone was 0.3%. A representative clone p1W1 replicated in a semiconservative manner only one round during the S phase of the cell cycle. It replicated extrachromosomally without integration into chromosome. The human segment of the clone was composed of several subsegments that promoted autonomous replication at different efficiencies. Our results suggest that certain specific nucleotide sequences are involved in autonomous replication of human segments. Images

Masukata, H; Satoh, H; Obuse, C; Okazaki, T

1993-01-01

179

Autonomous, teleoperated, and shared control of robot systems  

SciTech Connect

This paper illustrates how different modes of operation such as bilateral teleoperation, autonomous control, and shared control can be described and implemented using combinations of modules in the SMART robot control architecture. Telerobotics modes are characterized by different ``grids`` of SMART icons, where each icon represents a portion of run-time code that implements a passive control law. By placing strict requirements on the module`s input-output behavior and using scattering theory to develop a passive sampling technique, a flexible, expandable telerobot architecture is achieved. An automatic code generation tool for generating SMART systems is also described.

Anderson, R.J.

1994-12-31

180

Autonomous learning in humanoid robotics through mental imagery.  

PubMed

In this paper we focus on modeling autonomous learning to improve performance of a humanoid robot through a modular artificial neural networks architecture. A model of a neural controller is presented, which allows a humanoid robot iCub to autonomously improve its sensorimotor skills. This is achieved by endowing the neural controller with a secondary neural system that, by exploiting the sensorimotor skills already acquired by the robot, is able to generate additional imaginary examples that can be used by the controller itself to improve the performance through a simulated mental training. Results and analysis presented in the paper provide evidence of the viability of the approach proposed and help to clarify the rational behind the chosen model and its implementation. PMID:23122490

Di Nuovo, Alessandro G; Marocco, Davide; Di Nuovo, Santo; Cangelosi, Angelo

2012-10-22

181

Autonomous uninterruptable power supply apparatus  

NASA Astrophysics Data System (ADS)

This invention relates broadly to a power supply apparatus, and in particular to an autonomous uninterruptable power supply apparatus. The purpose of an uninterruptable power supply (UPS) is to protect critical electrical loads from transient or steady stage outages or disturbances in the primary power source. The basic configuration of a typical, commercially available, uninterruptable power supply is comprised at a minimum of a standby battery and a battery charger and may also include an inverter for AC applications. Systems of this type can be found in most computer installations and laboratory systems which cannot tolerate even momentary disturbances of input power. This document describes an autonomous uninterruptable power supply apparatus utilizing a digital processor unit as a control and monitor unit to measure and control input and output parameters in the power supply. A battery charger is utilized to maintain the voltage and current levels with the backup battery supply source which powers an inverter unit that converts the DC power to an AC output.

Masson, J. H.

1984-12-01

182

Autonomous navigation of USAF spacecraft  

NASA Astrophysics Data System (ADS)

The U. S. Air Force is developing satellite-borne sensors to enable autonomous navigation of spacecraft in the near future. This study compares the observations from several medium-accuracy space sensors, such as the existing telescopic space sextant, with those of future matrix-type sensors. The large field of view of matrix sensors will allow them to determine the Earth horizon to approximately an order of magnitude better than current infrared sensors by observing atmospheric refraction of stellar light. This horizon determination will give the matrix sensors an accuracy of less than 1 km. The limiting factor in Earth-horizon determination is the modeling of atmospheric refraction effects. For high-accuracy requirements (100 meters or less), the Global Positioning System (GPS) offers the only near-term solution. A relative navigation technique using range and Doppler data is proposed for autonomous navigation of the GPS satellites. The navigation accuracy of this technique is evaluated by consider covariance analysis and by processing corrupted data through a reduced-order onboard Sequentially Partitioned Algorithm. The algorithm is stable and for the GPS system produces in-plane accuracy of 40 meters over twenty days. However, out-of-plane motion is shown to be unobservable in the GPS-to-GPS tracking mode, and errors of up to 1.5 km over 60 days are experienced. For this reason, a supplemental transmitter on the ground or in a different orbit is recommended.

Ferguson, J. R., Jr.

1983-12-01

183

[Microgravity and autonomic nervous system].  

PubMed

How microgravity influences autonomic function is still under investigation. Microgravity induces neuro-vestibular alterations and body fluid shift, and these two changes cause "space motion sickness(SMS)" and cardiovascular deconditioning. "Space motion sickness" is a autonomic syndrome that exhibits nausea, vomiting, headache, anorexia, pallor etc., whose incidence in Space Shuttle mission reaches 67.1%. There are several hypotheses for SMS mechanism: 1) sensory conflict, 2) fluid shift, 3) otolith asymmetry, 4) space orientation readaptation, 5) otolith tilt-translation reinterpretation, and these hypotheses are considered to be combined together to cause SMS. After space flight, 64% of the astronauts suffer from orthostatic intolerance, which is defined as incompletion of 15 min of 70 degrees head-up tilt. Several causes for the deconditioning have been hypothesized, dehydration followed by fluid shift, altered gain for baroreflex sensitivity, decreased venous capacitance, etc. In our previous studies, we recorded muscle sympathetic nerve activity(MSNA) by microneurography under simulated and actual microgravity conditions. Parabolic flight, which induces 20 sec of actual microgravity, suppressed MSNA to 50%. Head-out water immersion suppressed MSNA to 20% while gradual recovery was observed during 3 hours of immersion. Dry immersion for 3 days revealed that MSNA was enhanced after simulated microgravity while the response to orthostasis was unchanged. Bed rest for 6, 14, and 120 days and Neurolab Project clarified the same tendency for longer duration of simulated microgravity. These alterations in MSNA might be attributed to the development of cardiovascular deconditioning after microgravity exposure. PMID:10944920

Iwase, S; Mano, T

2000-08-01

184

Myasthenia gravis with autoimmune autonomic neuropathy  

Microsoft Academic Search

The autoantibodies that impair neuromuscular junction transmission in myasthenia gravis are specific for the nicotinic acetylcholine receptor (AChR) of muscle. Antibodies specific for AChRs in ganglionic neurons are found in a majority of patients with subacute autonomic neuropathy. Dysautonomia is not a recognized feature of myasthenia gravis, but there have been rare reports of myasthenia gravis coexisting with autonomic failure,

Steven Vernino; William P. Cheshire; Vanda A. Lennon

2001-01-01

185

A solar-powered autonomous underwater vehicle  

Microsoft Academic Search

To meet the rapidly expanding requirements for Autonomous Underwater Vehicles (AUVs), Falmouth Scientific, Inc. (FSI) is working in cooperation with the Autonomous Undersea Systems Institute (AUSI) and Technology Systems Inc. (TSI) to develop a vehicle capable of long-term deployment and station-keeping duties. It has long been considered that AUV platforms, in principle, could provide an effective solution for surveillance (security

J. Jalbert; J. Baker; J. Duchesney; P. Pietryka; W. Dalton; D. R. Blidberg; S. Chappell; R. Nitzel; K. Holappa

2003-01-01

186

Autonomous Military Robotics: Risk, Ethics, and Design.  

National Technical Information Service (NTIS)

Imagine the face of warfare with autonomous robotics: Instead of our soldiers returning home in flag-draped caskets to heartbroken families, autonomous robots-mobile machines that can make decisions, such as to fire upon a target, without human interventi...

G. Bekey K. Abney P. Lin

2008-01-01

187

AUTONOMIC DYSFUNCTION AND PROGRESSION OF PARKINSON'S DISEASE  

Microsoft Academic Search

An exact quantitative evaluation method of autonomic dysfunction in Parkinson's disease (PD) for everyday clinical use has not been developed yet. The aim of this study was to evaluate autonomic cardiovascular regulation in mild and advanced stages of PD with the use of heart rate variability (HRV) examination. Twenty-five patients entered the study and passed short-term HRV examination in supine

188

Autonomic nervous system dysfunction in advanced cancer  

Microsoft Academic Search

The autonomic nervous system (ANS) innervates every organ in the body and is largely involuntary. There have been reports of autonomic dysfunction in cancer patients, but most are case reports. There are suggestions that this abnormality may be common in advanced cancer. Inpatients and outpatients with advanced cancer were enrolled. Patients were excluded if they had a previous diagnosis of

Declan Walsh; Kristine A. Nelson

2002-01-01

189

Evolutionary testing of autonomous software agents  

Microsoft Academic Search

A system built in terms of autonomous agents may require even greater correctness assurance than one which is merely reacting to the immediate control of its users. Agents make substantial decisions for themselves, so thorough testing is an important consideration. However, autonomy also makes testing harder; by their nature, autonomous agents may re- act in dierent ways to the same

Cu D. Nguyen; Anna Perini; Paolo Tonella; Simon Miles; Mark Harman; Michael Luck

2009-01-01

190

Technologies for highly miniaturized autonomous sensor networks  

Microsoft Academic Search

Recent results of the autonomous sensor research program HUMAN++ will be summarized in this paper. The research program aims to achieve highly miniaturized and (nearly) autonomous sensor systems that assist our health and comfort. Although the application examples are dedicated to human monitoring\\/assistance, the necessary technology development for this program is generic and can serve many wireless sensor applications. This

K. Baert; Bert Gyselinckx; T. Torfs; V. Leonov; F. Yazicioglu; S. Brebels; S. Donnay; J. Vanfleteren; M. Pastreen; E. Beyne; C. Van Hoof

2006-01-01

191

Enabling autonomous capabilities in underwater robotics  

Microsoft Academic Search

Underwater operations present unique challenges and opportunities for robotic applications. These can be at- tributed in part to limited sensing capabilities, and to lo- comotion behaviours requiring control schemes adapted to specific tasks or changes in the environment. From enhancing teleoperation procedures, to providing high-level instruction, all the way to fully autonomous operations, enabling autonomous capabilities is fundamental for the

Junaed Sattar; Gregory Dudek; Olivia Chiu; Ioannis M. Rekleitis; Philippe Giguère; Alec Mills; Nicolas Plamondon; Chris Prahacs; Yogesh Girdhar; Meyer Nahon; John-paul Lobos

2008-01-01

192

Advances in autonomous GPS Lagrangian buoys  

Microsoft Academic Search

Drifting buoys with onboard position receivers have provided valuable Lagrangian current data since their introduction in the mid-1980s. Current autonomous buoys with Global Positioning System (GPS) receivers provide data with quality and quantity unobtainable with ARGOS-only positioning. Advances in hardware, software, and pricing are rapidly broadening the range of applications for these buoys. The author has been constructing autonomous GPS

1995-01-01

193

Defining Autonomic Computing: A Software Engineering Perspective  

Microsoft Academic Search

As a rapidly growing field, autonomic computing is a promising new approach for developing large scale distributed systems. However, while the vision of achieving self-management in computing systems is well established, the field still lacks a commonly accepted definition of 'what' an autonomic computing system is. Without a common definition to dictate the direction of development, it is not possible

Paul Lin; Alexander Macarthur; John Leaney

2005-01-01

194

Optimal fuzzy control of autonomous robot car  

Microsoft Academic Search

The paper describes the design of the fuzzy control system for an autonomous robot car which operates in unknown, unpredictable, and dynamic environment. The fuzzy control system must provide the fusing of data from multiple sensors and must ensure navigation of the autonomous robot car. Both - an obstacle avoidance control strategy and a target tracking control strategy - are

Ovid Farhi; Yordan Chervenkov

2008-01-01

195

The C2000 autonomous model car  

Microsoft Academic Search

The paper describes the development of an electrical model car on a scale of 1:10, which is able to drive autonomously at a race course, to find parking spaces and to use it for autonomous parking. The electronic design is based on a set of C28x Digital Signal Controllers for steering, to control the electrical motor, for image processing and

Frank Bormann; Erik Braune; Marcel Spitzner

2010-01-01

196

Clavileño: Evolution of an autonomous car  

Microsoft Academic Search

Cars capable of driving in urban environments autonomously are today one of the most challenging topics in the intelligent transportation systems (ITS) field. This paper deals with the evolution of Clavileño -a gas propelled vehicle-in its automation process towards a fully autonomous car driving in a real word. So, the required modifications for a mass-produced car in order to equip

Vicente Milanés; David F. Llorca; Blas M. Vinagre; Carlos González; Miguel A. Sotelo

2010-01-01

197

Smart Cars as Autonomous Intelligent Agents  

Microsoft Academic Search

This paper presents a study on the behavior of smart cars by considering them as autonomous intelligent agents. In particular, a smart car could behave as autonomous agent by extracting information from the surrounding environment (road, highway) and determining its position in it, detecting the motion and tracking the behavioral patterns of other moving objects (automobiles) in its own surrounding

Nikolaos G. Bourbakis; Michael Findler

2001-01-01

198

A self-modeling autonomous airship  

Microsoft Academic Search

A self modeling airship with a parametric autonomous controller is introduced in this paper. Modeling of airships for autonomous control is a detailed and often time-taking process if some of the parameters are unknown. Although it is possible to make reasonable assumptions in some restricted case, a model generally consists of parameters such as, weight, coordinates of the center of

Halit Bener SUAY; Takehisa YAIRI; Kazuo MACHIDA

2009-01-01

199

Autonomous Motivation, Controlled Motivation, and Goal Progress  

Microsoft Academic Search

Although the self-concordance of goals has been repeat- edly shown to predict better goal progress, recent research suggests potential problems with aggregating autonomous and controlled moti- vations to form a summary index of self-concordance ( Judge, Bono, Erez, & Locke, 2005). The purpose of the present investigation was to further examine the relations among autonomous motivation, controlled motivation, and goal

Richard Koestner; Nancy Otis; Theodore A. Powers; Luc Pelletier; Hugo Gagnon

2008-01-01

200

Autonomic Physiological Response Patterns Related to Intelligence  

ERIC Educational Resources Information Center

We examined autonomic physiological responses induced by six different cognitive ability tasks, varying in complexity, that were selected on the basis of on Guilford's Structure of Intellect model. In a group of 52 participants, task performance was measured together with nine different autonomic response measures and respiration rate. Weighted…

Melis, Cor; van Boxtel, Anton

2007-01-01

201

Cardiovascular autonomic neuropathy in HIV infected patients  

Microsoft Academic Search

OBJECTIVE: To evaluate the presence and extent of autonomic dysfunction in HIV infected individuals of one ethnic group. DESIGN: Prospective, age-sex matched study. METHODS: 25 patients (seven asymptomatic (HIV), eight AIDS related complex (ARC), 10 AIDS) and 25 controls were recruited from patients and staff at the Aga Khan Hospital, Nairobi. Autonomic function was assessed by measurement of pulse rate

K. E. Rogstad; R. Shah; G. Tesfaladet; M. Abdullah; I. Ahmed-Jushuf

1999-01-01

202

Developing Autonomic Management Systems in Federated Environments  

Microsoft Academic Search

Autonomic Systems aim to reduce the costs of operating information and communication technology systems through employing knowledge-driven control loops to ensure that the systems operate within a defined behavioral envelope that conforms to business goals. However, as autonomic system implementations become more flexible and as the business environments within which they operate become more dynamic, with less clearly defined management

David Lewis; Kevin Feeney; Jose A Lozano

2009-01-01

203

Using collaborative Autonomous Vehicles in Mine Countermeasures  

Microsoft Academic Search

This article describes concepts evaluated at NATO Undersea Research Centre (NURC) recent experiment as the part of Autonomous Mine Countermeasures (MCM) Program. We investigated the possibility of reacquisition of the target with the Autonomous Surface Vehicle (ASV), the possibility of controlling the position of the ASV relative to the target location, and tested the concept of guiding a neutralization weapon

Vladimir Djapic; Dula Nad

2010-01-01

204

Autonomic involvement in extrapyramidal and cerebellar disorders  

Microsoft Academic Search

We reviewed the clinical and autonomic features of all patients with extrapyramidal and cerebellar disorders studied in the Mayo Autonomic Reflex Laboratory from 1983 to 1989. Patients were grouped into the following categories (number in parentheses): Parkinson's disease (35); parkinsonism-plus (54); multiple system atrophy (75); hereditary multisystem degenerations (eleven); progressive supranuclear palsy (32); non-familial cerebellar degeneration (eleven); nonspecific sporadic multisystem

Paola Sandroni; J. Eric Ahlskog; Robert D. Fealey; Phillip A. Low

1991-01-01

205

ajME: making game engines autonomic  

Microsoft Academic Search

Autonomic Computing is now showing its value as a solution to the increased complexities of maintaining computer systems and has been applied to many different fields. In this paper, we demonstrate how a gaming application can benefit from autonomic principles. Currently, minimal adaptivity has been used in games and is typically manifested as bespoke mechanisms that cannot be shared, extended,

Pedro Martins; Julie A. McCann

2010-01-01

206

Autonomic dysfunction in gastrointestinal motility disorders  

Microsoft Academic Search

The records of 113 consecutive patients with a suspected gastrointestinal motility disorder referred between January 1988 and July 1991 were retrospectively reviewed. The aims were to identify the prevalence of autonomic dysfunction in those with or without associated neurological disease and to determine the diagnostic value of testing for autonomic dysfunction. All patients had gastrointestinal manometry (3 hours fasting, 2

A E Bharucha; M Camilleri; P A Low; A R Zinsmeister

1993-01-01

207

Autonomous buoyancy-driven underwater gliders  

Microsoft Academic Search

A class of small (50 kg, 2 m length), reusable autonomous underwater vehicles capable of operating at speeds of 20-30 cm\\/s with ranges several thousand kilometers and durations of months has been developed and tested. The vehicles, essentially autonomous profiling floats with wings, execute sawtooth patterns between the surface, where they are located and communicate to shore, and depths of

Russ E. Davis; Charles C. Eriksen; Clayton P. Jones

2002-01-01

208

Bortezomib-induced severe autonomic neuropathy.  

PubMed

Peripheral neuropathy is a known side effect of bortezomib therapy. Acute autonomic neuropathy may also follow treatment with this cytotoxic agent used for treatment of multiple myeloma. Here, we report clinical characteristics and patterns of autonomic involvement in a 75-year-old patient who presented with recurring syncopes. PMID:22532274

Stratogianni, A; Tosch, M; Schlemmer, H; Weis, J; Katona, I; Isenmann, S; Haensch, C A

2012-04-25

209

An Internal Language for Autonomous Categories  

Microsoft Academic Search

We present an internal language for symmetric monoidal closed (autonomous) categories analogous to the typed lambda calculus as an internal language for cartesian closed categories. The language we propose is the term assignment to the multiplicative fragment of Intuitionistic Linear Logic, which possesses exactly the right structure for an autonomous theory. We prove that this language is an internal language

Ian Mackie; Leopoldo Román; Samson Abramsky

1993-01-01

210

Basic and Clinical Pharmacology of Autonomic Drugs  

PubMed Central

Autonomic drugs are used clinically to either imitate or inhibit the normal functions of the sympathetic and parasympathetic nervous systems. A large number of additional drug classes also interact with these systems to produce a stunning number of possible side effects. This article reviews the basic function of the autonomic nervous system and the various drug classes that act within these neural synapses.

Becker, Daniel E.

2012-01-01

211

Digital Libraries and Autonomous Citation Indexing  

Microsoft Academic Search

The World Wide Web is revolutionizing the way that researchers access scientific information. Articles are increasingly being made available on the homepages of authors or institutions, at journal Web sites, or in online archives. However, scientific information on the Web is largely disorganized. This article introduces the creation of digital libraries incorporating Autonomous Citation Indexing (ACI). ACI autonomously creates citation

Steve Lawrence; C. Lee Giles; Kurt D. Bollacker

1999-01-01

212

Autonomous Control of Space Reactor Systems  

SciTech Connect

Autonomous and semi-autonomous control is a key element of space reactor design in order to meet the mission requirements of safety, reliability, survivability, and life expectancy. Interrestrial nuclear power plants, human operators are avilable to perform intelligent control functions that are necessary for both normal and abnormal operational conditions.

Belle R. Upadhyaya; K. Zhao; S.R.P. Perillo; Xiaojia Xu; M.G. Na

2007-11-30

213

A cognitive system for autonomous robotic welding  

Microsoft Academic Search

Currently, there is a high demand for autonomous industrial production systems. This paper outlines the development of a cognitive system for autonomous robotic welding. This system is based on dimensionality reduction techniques and Support Vector Machines, allowing the system to learn to separate between acceptable and unacceptable welding results within one batch, and to transfer this ability to a batch

Georg Schroth; Ingo Stork; Klaus Diepold

2009-01-01

214

New Small Autonomous Schools District Policy. Revised.  

ERIC Educational Resources Information Center

|Inspired by the gains in student achievement realized by the small schools movement in New York City, the Oakland Unified School District (California) has proposed creating a network of 10 new, small autonomous (NSA) schools over the next 3 years. School size will range between 250 and 500 students, depending on grade level. "Autonomous" means…

Oakland Unified School District, CA.

215

L'Espagne des Communautés régionales autonomes  

Microsoft Academic Search

[eng] Spain and Regional Autonomous Communities Roland Colin The Spanish nation was built up from many historic components, often antagonistic (Islam, Judaism, Christianity). In the XVIth century, after Reconquest, Castile, united with Aragon, started upon constructing national unification. Ever since, Spanish policy has been torn between federalist temptation and Unitarian affirmation. The 1978 Constitution recognized the right to Autonomous Communities

Roland Colin

1988-01-01

216

Towards Autonomous, Perceptive, and Intelligent Virtual Actors  

Microsoft Academic Search

This paper explains methods to provide autonomous virtual humans with the skills necessary to perform stand-alone role in films, games and interactive television. We present current research developments in the Virtual Life of autonomous synthetic actors. After a brief description of our geometric, physical, and auditory Virtual Environments, we introduce the perception action principles with a few simple examples. We

Daniel Thalmann; Hansrudi Noser

1999-01-01

217

Autonomous Daylight Detection of Life by Fluorescence Imaging  

NASA Astrophysics Data System (ADS)

An integrated fluorescence imaging system was used to detect biomarkers from extant microbial colonies and biofilms during autonomous rover exploration. Chlorophyll and other biomarkers were visualized autonomously.

Weinstein, S.; Pane, D.; Ernst, L. A.; Minkley, E.; Lanni, F.; Wettergreen, D. S.; Wagner, M.; Heys, S.; Teza, J.; Waggoner, A. S.

2006-03-01

218

Pathology of emesis: its autonomic basis.  

PubMed

Vagal and non-vagal pathways as well as several brainstem nuclei participate in vomiting in response to different emetic stimuli. Autonomic pathways involved in nausea are less well understood. Numerous gastrointestinal disorders with prominent nausea and vomiting including gastroparesis, cyclic vomiting syndrome, and motion sickness have associated autonomic nervous system dysfunction. Autonomic disturbances are also seen with non-gastrointestinal diseases with gut manifestations such as migraine headaches, orthostatic intolerance, and familial dysautonomia. Stimulation of emetic pathways involves activation of a range of receptor subtypes. Agents acting on these receptors form the basis for antiemetic therapies. Chemotherapy-induced nausea and vomiting, a prevalent and severe consequence of anticancer treatment, is preventable in many instances by agents acting on the autonomic nervous system. Likewise, non-medication therapies may act in part via modulation of some of these same autonomic pathways. PMID:24095137

Hasler, William L

2013-01-01

219

Autonomous navigation system and method  

DOEpatents

A robot platform includes perceptors, locomotors, and a system controller, which executes instructions for autonomously navigating a robot. The instructions repeat, on each iteration through an event timing loop, the acts of defining an event horizon based on the robot's current velocity, detecting a range to obstacles around the robot, testing for an event horizon intrusion by determining if any range to the obstacles is within the event horizon, and adjusting rotational and translational velocity of the robot accordingly. If the event horizon intrusion occurs, rotational velocity is modified by a proportion of the current rotational velocity reduced by a proportion of the range to the nearest obstacle and translational velocity is modified by a proportion of the range to the nearest obstacle. If no event horizon intrusion occurs, translational velocity is set as a ratio of a speed factor relative to a maximum speed.

Bruemmer, David J. (Idaho Falls, ID); Few, Douglas A. (Idaho Falls, ID)

2009-09-08

220

Sign detection for autonomous navigation  

NASA Astrophysics Data System (ADS)

Mobile robots currently cannot detect and read arbitrary signs. This is a major hindrance to mobile robot usability, since they cannot be tasked using directions that are intuitive to humans. It also limits their ability to report their position relative to intuitive landmarks. Other researchers have demonstrated some success on traffic sign recognition, but using template based methods limits the set of recognizable signs. There is a clear need for a sign detection and recognition system that can process a much wider variety of signs: traffic signs, street signs, store-name signs, building directories, room signs, etc. We are developing a system for Sign Understanding in Support of Autonomous Navigation (SUSAN), that detects signs from various cues common to most signs: vivid colors, compact shape, and text. We have demonstrated the feasibility of our approach on a variety of signs in both indoor and outdoor locations.

Goodsell, Thomas G.; Snorrason, Magnús S.; Cartwright, Dustin; Stube, Brian; Stevens, Mark R.; Ablavsky, Vitaly X.

2003-09-01

221

Autonomous caregiver following robotic wheelchair  

NASA Astrophysics Data System (ADS)

In the last decade, a variety of robotic/intelligent wheelchairs have been proposed to meet the need in aging society. Their main research topics are autonomous functions such as moving toward some goals while avoiding obstacles, or user-friendly interfaces. Although it is desirable for wheelchair users to go out alone, caregivers often accompany them. Therefore we have to consider not only autonomous functions and user interfaces but also how to reduce caregivers' load and support their activities in a communication aspect. From this point of view, we have proposed a robotic wheelchair moving with a caregiver side by side based on the MATLAB process. In this project we discussing about robotic wheel chair to follow a caregiver by using a microcontroller, Ultrasonic sensor, keypad, Motor drivers to operate robot. Using camera interfaced with the DM6437 (Davinci Code Processor) image is captured. The captured image are then processed by using image processing technique, the processed image are then converted into voltage levels through MAX 232 level converter and given it to the microcontroller unit serially and ultrasonic sensor to detect the obstacle in front of robot. In this robot we have mode selection switch Automatic and Manual control of robot, we use ultrasonic sensor in automatic mode to find obstacle, in Manual mode to use the keypad to operate wheel chair. In the microcontroller unit, c language coding is predefined, according to this coding the robot which connected to it was controlled. Robot which has several motors is activated by using the motor drivers. Motor drivers are nothing but a switch which ON/OFF the motor according to the control given by the microcontroller unit.

Ratnam, E. Venkata; Sivaramalingam, Sethurajan; Vignesh, A. Sri; Vasanth, Elanthendral; Joans, S. Mary

2011-12-01

222

Autonomous movement of controllable assembled Janus capsule motors.  

PubMed

We demonstrate the first example of a self-propelled Janus polyelectrolyte multilayer hollow capsule that can serve as both autonomous motor and smart cargo. This new autonomous Janus capsule motor composed of partially coated dendritic platinum nanoparticles (Pt NPs) was fabricated by using a template-assisted layer-by-layer (LbL) self-assembly combined with a microcontact printing method. The resulting Janus capsule motors still retain outstanding delivery capacities and can respond to external stimuli for controllable encapsulation and triggered release of model drugs. The Pt NPs on the one side of the Janus capsule motors catalytically decompose hydrogen peroxide fuel, generating oxygen bubbles which then recoil the movement of the capsule motors in solution or at an interface. They could autonomously move at a maximum speed of above 1 mm/s (over 125 body lengths/s), while exerting large forces exceeding 75 pN. Also, these asymmetric hollow capsules can be controlled by an external magnetic field to achieve directed movement. This LbL-assembled Janus capsule motor system has potential in making smart self-propelling delivery systems. PMID:23153409

Wu, Yingjie; Wu, Zhiguang; Lin, Xiankun; He, Qiang; Li, Junbai

2012-11-20

223

Motion coordination of multiple autonomous vehicles in a spatiotemporal flowfield  

NASA Astrophysics Data System (ADS)

The long-term goal of this research is to provide theoretically justified control strategies to operate autonomous vehicles in spatiotemporal flowfields. The specific objective of this dissertation is to use estimation and nonlinear control techniques to generate decentralized control algorithms that enable motion coordination for multiple autonomous vehicles while operating in a time-varying flowfield. A cooperating team of vehicles can benefit from sharing data and tasking responsibilities. Many existing control algorithms promote collaboration of autonomous vehicles. However, these algorithms often fail to account for the degradation of control performance caused by flowfields. This dissertation presents decentralized multivehicle coordination algorithms designed for operation in a spatially or temporally varying flowfield. Each vehicle is represented using a Newtonian particle traveling in a plane at constant speed relative to the flow and subject to a steering control. Initially, we assume the flowfield is known and describe algorithms that stabilize a circular formation in a time-varying spatially nonuniform flow of moderate intensity. These algorithms are extended by relaxing the assumption that the flow is known: the vehicles dynamically estimate the flow and use that estimate in the control. We propose a distributed estimation and control algorithm comprising a consensus filter to share information gleaned from noisy position measurements, and an information filter to reconstruct a spatially varying flowfield. The theoretical results are illustrated with numerical simulations of circular formation control and validated in outdoor unmanned aerial vehicle (UAV) flight tests.

Peterson, Cameron Kai

224

Compact, autonomous, multi-mission synthetic aperture radar  

NASA Astrophysics Data System (ADS)

The utilization of unmanned aerial systems (UASs) for intelligence, surveillance and reconnaissance (ISR) applications continues to increase and unmanned systems have become a critical asset in current and future battlespaces. With the development of medium-to-low altitude, rapidly deployable aircraft platforms, the ISR community has seen an increasing push to develop ISR sensors and systems with real-time mission support capabilities. This paper describes the design and development of the RASAR (Real-time, Autonomous, Synthetic Aperture Radar) sensor system and presents demonstration flight test results. RASAR is a modular, multi-band (L and X) synthetic aperture radar (SAR) imaging sensor designed for self-contained, autonomous, real-time operation with mission flexibility to support a wide range of ISR needs within the size, weight and power constraints of Group III UASs. SAR waveforms are generated through direct digital synthesis enabling arbitrary waveform notching to enable operations in cluttered RF environments. RASAR is capable of simultaneous dual-channel receive to enable polarization based target discrimination. The sensor command and control and real-time image formation processing are designed to enable integration of RASAR into larger, multi-intelligence system of systems. The multi-intelligence architecture and a demonstration of real-time autonomous cross-cueing of a separate optical sensor will be presented.

Walls, Thomas J.; Wilson, Michael L.; Madsen, David; Knight, Chad; Jensen, Mark D.; Partridge, Darin C.; Addario, Mike

2013-05-01

225

Management Approaches to Hypertension in Autonomic Failure  

PubMed Central

Purpose of Review Supine hypertension is a common finding in autonomic failure that can worsen orthostatic hypotension and predispose to end-organ damage. This review focuses on non-pharmacologic and pharmacologic approaches to manage hypertension in these patients, in the face of disabling orthostatic hypotension. Recent Findings The hypertension of autonomic failure can be driven by sympathetic dependent or independent mechanisms, depending on the site of autonomic lesions. Management of supine hypertension should include simple non-pharmacologic approaches including avoiding the supine position during the daytime and head-up tilt at night. Most patients, however, require pharmacologic treatment. Several antihypertensive therapies lower night-time pressure in autonomic failure, but none improve nocturnal volume depletion or morning orthostatic tolerance. Regardless, treatment may still be beneficial in some patients but must be determined on an individual basis, considering disease type and overnight monitoring. Further, doses must be carefully titrated as these patients are hypersensitive to depressor agents due to loss of baroreceptor reflexes. Summary Autonomic failure provides a unique opportunity to study blood pressure regulation independent of autonomic influences. Understanding mechanisms driving supine hypertension will have important implications for the treatment of autonomic failure and will improve our knowledge of cardiovascular regulation in other populations, including essential hypertension and elderly hypertensives with comorbid orthostatic hypotension.

Arnold, Amy C.; Biaggioni, Italo

2013-01-01

226

An autonomous structural health monitoring solution  

NASA Astrophysics Data System (ADS)

Combining advanced sensor technologies, with optimised data acquisition and diagnostic and prognostic capability, structural health monitoring (SHM) systems provide real-time assessment of the integrity of bridges, buildings, aircraft, wind turbines, oil pipelines and ships, leading to improved safety and reliability and reduced inspection and maintenance costs. The implementation of power harvesting, using energy scavenged from ambient sources such as thermal gradients and sources of vibration in conjunction with wireless transmission enables truly autonomous systems, reducing the need for batteries and associated maintenance in often inaccessible locations, alongside bulky and expensive wiring looms. The design and implementation of such a system however presents numerous challenges. A suitable energy source or multiple sources capable of meeting the power requirements of the system, over the entire monitoring period, in a location close to the sensor must be identified. Efficient power management techniques must be used to condition the power and deliver it, as required, to enable appropriate measurements to be taken. Energy storage may be necessary, to match a continuously changing supply and demand for a range of different monitoring states including sleep, record and transmit. An appropriate monitoring technique, capable of detecting, locating and characterising damage and delivering reliable information, whilst minimising power consumption, must be selected. Finally a wireless protocol capable of transmitting the levels of information generated at the rate needed in the required operating environment must be chosen. This paper considers solutions to some of these challenges, and in particular examines SHM in the context of the aircraft environment.

Featherston, Carol A.; Holford, Karen M.; Pullin, Rhys; Lees, Jonathan; Eaton, Mark; Pearson, Matthew

2013-05-01

227

See and avoidance behaviors for autonomous navigation  

NASA Astrophysics Data System (ADS)

Recent advances in many multi-discipline technologies have allowed small, low-cost fixed wing unmanned air vehicles (UAV) or more complicated unmanned ground vehicles (UGV) to be a feasible solution in many scientific, civil and military applications. Cameras can be mounted on-board of the unmanned vehicles for the purpose of scientific data gathering, surveillance for law enforcement and homeland security, as well as to provide visual information to detect and avoid imminent collisions for autonomous navigation. However, most current computer vision algorithms are highly complex computationally and usually constitute the bottleneck of the guidance and control loop. In this paper, we present a novel computer vision algorithm for collision detection and time-to-impact calculation based on feature density distribution (FDD) analysis. It does not require accurate feature extraction, tracking, or estimation of focus of expansion (FOE). Under a few reasonable assumptions, by calculating the expansion rate of the FDD in space, time-to-impact can be accurately estimated. A sequence of monocular images is studied, and different features are used simultaneously in FDD analysis to show that our algorithm can achieve a fairly good accuracy in collision detection. In this paper we also discuss reactive path planning and trajectory generation techniques that can be accomplished without violating the velocity and heading rate constraints of the UAV.

Lee, Dah-Jye; Beard, Randal W.; Merrell, Paul C.; Zhan, Pengcheng

2004-12-01

228

Chronic progressive autonomic dysfunction in a dog.  

PubMed

A 3.5-year-old intact male American Pit Bull was presented because of urinary incontinence and dysuria. Constipation, followed by diarrhoea, ocular disturbances and finally regurgitation developed over the next 4 years. Autonomic dysfunction was evidenced by clinical presentation, as well as positive ophthalmic pilocarpine test and subnormal Schirmer tear test. Diagnosis, however, was established through histopathological and immunohistochemical examination. Lesions attributable to inflammatory degenerative neuropathy of the autonomic ganglia, which represents one of the various types of human autonomic failure, were detected. PMID:16466461

Adamama-Moraitou, K K; Brellou, G D; Rallis, T S; Zavros, N; Pardali, D; Dinopoulos, A; Vlemmas, I

2006-03-01

229

Apoptosis and Self-Destruct: A Contribution to Autonomic Agents?  

Microsoft Academic Search

Autonomic Computing (AC), a self-managing systems initiative based on the biological metaphor of the autonomic nervous system, is increasingly gaining momentum as the way forward in designing reliable systems. Agent technologies have been identified as a key enabler for engineering autonomicity in systems, both in terms of retrofitting autonomicity into legacy systems and designing new systems. The AC initiative provides

Roy Sterritt; Michael G. Hinchey

2004-01-01

230

Autonomous Towed Vehicle for Underwater Inspection in a Port Area  

Microsoft Academic Search

This paper discusses an autonomous towed vehicle for underwater inspection in a port area, in which a sea current is so fast and complex. The autonomous towed vehicle has three different navigation modes; towed mode, autonomous mode and kite mode, to assure safe and reliable inspection in such a port area. An autonomous underwater vehicle (AUV) is employed as a

Jin-kyu Choi; Hiroshi Sakai; Toshinari Tanaka

2005-01-01

231

Autonomous Robotics Laboratory: Hardware Demonstration of Cooperative Formation Control Laws  

Microsoft Academic Search

Autonomous robots are expected to be a key part of future space exploration, and for- mation control of robotic vehicles may be one autonomous task used in lunar or Martian exploration. This paper presents a cooperative control law to drive a group of autonomous robots to a desired formation. The cooperative control laws were implemented using the Autonomous Robotics Laboratory

Kristen E. Holmstrom; R oy Palacios; Brock Spratlen; Cynthia Ochoa; Lisa Warren; Lesley A. Weitz

232

PSO based frequency controller for wind-solar-diesel hybrid energy generation\\/energy storage system  

Microsoft Academic Search

The aim of this paper is the tuning of a PI controller using PSO techniques for autonomous hybrid energy generation\\/energy storage system. The autonomous hybrid generation system consisting of wind turbine generators (WTG), solar photovoltaic (PV), diesel engine generators (DEG), fuel cells (FC), battery energy storage system (BESS), ultra capacitors ( UC) and aqua electrolyzer (AE) has been considered for

Dulal Ch Das; A. K. Roy; N. Sinha

2011-01-01

233

Field test of an autonomous wind-diesel power plant  

NASA Astrophysics Data System (ADS)

An autonomous power plant composed of a wind energy converter and a diesel generator was tested in laboratory and in the field to assess the wind energy supply as a noninfluenceable parameter in the regulation of the mono and bivalent operation of the power plant, for control of the dynamic behavior of the electrical components, for tuning of the regulation expenditure with comfort requirements, and for model evaluation of energy cost analysis. The interaction between meteorological, technical, economic and energy policy aspects was assessed. The relationship between economical use and comfort limits technical improvement. Development of the concept of a bivalent power supply with wind and diesel is recommended.

Fritzsche, A.; Knoebel, U.; Ruckert, W.

1985-09-01

234

Growing self-organizing trees for autonomous hierarchical clustering.  

PubMed

This paper presents a new unsupervised learning method based on growing processes and autonomous self-assembly rules. This method, called Growing Self-organizing Trees (GSoT), can grow both network size and tree topology to represent the topological and hierarchical dataset organization, allowing a rapid and interactive visualization. Tree construction rules draw inspiration from elusive properties of biological organization to build hierarchical structures. Experiments conducted on real datasets demonstrate good GSoT performance and provide visual results that are generated during the training process. PMID:23041056

Doan, Nhat-Quang; Azzag, Hanane; Lebbah, Mustapha

2012-09-19

235

[Clinical application of micro-vibration to autonomic function test].  

PubMed

Microvibration (MV) is the minute vibration observed on surface of the human body. MV on the thenar eminence has been used as an autonomic function test, and is one of the important psychophysiological methods in psychosomatic medicine because the measurement of MV is not invasive. Although the mechanism generating MV has not been definitely clarified, there seems to be two major components, a ballistocardiographic one and a muscular one. The analysis of MV focuses on frequency characteristics. To broaden the clinical application of MV measurement, it is necessary to improve the analyzing method and to develop a way for evaluating MV comprehensively by combining it with other examinations. PMID:1619758

Mishima, N; Oka, T; Tanaka, H

1992-04-01

236

Issues and approaches in control for autonomous reactor operation  

SciTech Connect

A capability for autonomous and passively safe operation is one of the goals of the NERI funded development of Generation IV nuclear plants. An approach is described for evaluating the effect of increasing autonomy on safety margins and load behavior and for examining issues that arise with increasing autonomy and their potential impact on performance. The method provides a formal approach to the process of exploiting the innate self-regulating property of a reactor to make it less dependent on operator action and less vulnerable to automatic control system fault and/or operator error. Some preliminary results are given.

Vilim, R. B.; Khalil, H. S.; Wei, T. Y. C.

2000-07-20

237

Cooperative Autonomic Management in Dynamic Distributed Systems  

NASA Astrophysics Data System (ADS)

The centralized management of large distributed systems is often impractical, particularly when the both the topology and status of the system change dynamically. This paper proposes an approach to application-centric self-management in large distributed systems consisting of a collection of autonomic components that join and leave the system dynamically. Cooperative autonomic components self-organize into a dynamically created overlay network. Through local information sharing with neighbors, each component gains access to global information as needed for optimizing performance of applications. The approach has been validated and evaluated by developing a decentralized autonomic system consisting of multiple autonomic application managers previously developed for the In-VIGO grid-computing system. Using analytical results from complex random network and measurements done in a prototype system, we demonstrate the robustness, self-organization and adaptability of our approach, both theoretically and experimentally.

Xu, Jing; Zhao, Ming; Fortes, José A. B.

238

Autonomous Support for Microorganism Research in Space.  

National Technical Information Service (NTIS)

A preliminary design for performing on orbit, autonomous research on microorganisms and cultured cells/tissues is presented. An understanding of gravity and its effects on cells is crucial for space exploration as well as for terrestrial applications. The...

M. L. Fleet M. S. Miller D. Shipley J. D. Smith

1992-01-01

239

Autonomous Legged Hill and Stairwell Ascent.  

National Technical Information Service (NTIS)

This paper documents near-autonomous negotiation of synthetic and natural climbing terrain by a rugged legged robot,achieved through sequential composition of appropriate perceptually triggered locomotion primitives. The first, simple composition achieves...

A. M. Johnson D. E. Koditschek G. C. Haynes M. T. Hale

2011-01-01

240

Tracked robot controllers for climbing obstacles autonomously  

NASA Astrophysics Data System (ADS)

Research in mobile robot navigation has demonstrated some success in navigating flat indoor environments while avoiding obstacles. However, the challenge of analyzing complex environments to climb obstacles autonomously has had very little success due to the complexity of the task. Unmanned ground vehicles currently exhibit simple autonomous behaviours compared to the human ability to move in the world. This paper presents the control algorithms designed for a tracked mobile robot to autonomously climb obstacles by varying its tracks configuration. Two control algorithms are proposed to solve the autonomous locomotion problem for climbing obstacles. First, a reactive controller evaluates the appropriate geometric configuration based on terrain and vehicle geometric considerations. Then, a reinforcement learning algorithm finds alternative solutions when the reactive controller gets stuck while climbing an obstacle. The methodology combines reactivity to learning. The controllers have been demonstrated in box and stair climbing simulations. The experiments illustrate the effectiveness of the proposed approach for crossing obstacles.

Vincent, Isabelle

2009-05-01

241

Interdisciplinary Applications of Autonomous Observation Systems.  

National Technical Information Service (NTIS)

Our long-term goal is to develop improved autonomous observation systems and analytical capabilities for describing the distributions and activities of marine microbes in relation to their physical, chemical, and optical environment in support of multidis...

J. J. Cullen M. R. Lewis

2009-01-01

242

Autonomous Support for Microorganism Research in Space.  

National Technical Information Service (NTIS)

A preliminary design for performing on-orbit, autonomous research on microorganisms and cultured cells/tissues is presented. An understanding of gravity and its effects on cells is crucial for space exploration as well as for terrestrial applications. The...

M. W. Luttges D. M. Klaus M. L. Fleet M. S. Miller D. E. Shipley

1992-01-01

243

Exploring Mars via Autonomously Networked Spacecraft  

NASA Astrophysics Data System (ADS)

Enabling multiple assets to coordinate their activities autonomously via space networking techniques can significantly improve the way we explore Mars by enabling collaborative observations to improve science return and flexibility to reduce risk.

Wyatt, E. J.; Burleigh, S. C.; Clare, L. P.; Torgerson, J. L.; Wagstaff, K. L.

2012-06-01

244

Khepera robots applied to highway autonomous mobiles  

Microsoft Academic Search

This article presents simulation models of autonomous Khepera robots which are assumed to be running on a highway. Each robot\\u000a acts by following the fish-school algorithm. Although a school of fish does not need a special individual to lead it, an autonomous\\u000a movement emerges from interactions among neighboring bodies. Our goal is multirobots which behave safely, with no accidents,\\u000a solely

Tatsuro Shinchi; Masayoshi Tabuse; Tetsuro Kitazoe; Akinobu Todaka

2003-01-01

245

Evolutionary testing of autonomous software agents  

Microsoft Academic Search

A system built in terms of autonomous software agents may require even greater correctness assurance than one that is merely\\u000a reacting to the immediate control of its users. Agents make substantial decisions for themselves, so thorough testing is an\\u000a important consideration. However, autonomy also makes testing harder; by their nature, autonomous agents may react in different\\u000a ways to the same

Cu D. Nguyen; Simon Miles; Anna Perini; Paolo Tonella; Mark Harman; Michael Luck

246

Cardiac ectopy in chronic autonomic failure  

Microsoft Academic Search

Objective  Chronic autonomic failure (CAF), as in Parkinson disease (PD), multiple system atrophy (MSA), and pure autonomic failure (PAF),\\u000a typically entails baroreflex failure, neurogenic orthostatic hypotension (NOH), and supine hypertension. The combination might\\u000a predispose to cardiac ectopy, which in turn might predispose to syncope and falls during manipulations decreasing venous return\\u000a to the heart. This study assessed whether CAF is associated

David S. Goldstein

2010-01-01

247

Vision based controller for autonomous aerial refueling  

Microsoft Academic Search

Autonomous aerial refueling is an important capability for unmanned aerial vehicles. This paper develops a candidate autonomous probe-and-drogue aerial refueling controller for an existing vision based relative position sensor and navigation system. The feasibility of the combined sensor-navigator-controller is demonstrated by a simulated UAV docking maneuver to a moving drogue in light turbulence. Results indicate that the controller can provide

Jennifer Kimmett; John Valasek; John L. Junkins

2002-01-01

248

The Techsat-21 autonomous space science agent  

Microsoft Academic Search

The Autonomous Sciencecraft Experiment (ASE) will fly onboard the Air Force TechSat-21 constellation of three spacecraft scheduled for launch in 2004. ASE uses onboard continuous planning, robust task and goal-based execution, model-based mode identification and reconfiguration, and onboard machine learning and pattern recognition to radically increase science return by enabling intelligent downlink selection and autonomous retargeting. In this paper we

Steve A. Chien; Rob Sherwood; Gregg Rabideau; Rebecca Castano; Ashley Davies; Michael C. Burl; Russell Knight; Timothy M. Stough; Joseph Roden; Paul Zetocha; Ross Wainwright; Pete Klupar; Jim Van Gaasbeck; Pat Cappelaere; Dean Oswald

2002-01-01

249

An Architectural Approach to Autonomic Computing  

Microsoft Academic Search

Abstract We describe an architecturalapproach,to achieving the goals of autonomic ,computing. The architecture that we outline ,describes interfaces and behavioral requirements for individual system components, describes how ,interactions among ,components ,are established, and recommends design patterns that engender,the desired system-level properties of self- configuration, self-optimization, self-healing and self- protection. We have ,validated many ,of these ideas in two prototype autonomic,computing,systems.

Steve R. White; James E. Hanson; Ian Whalley; David M. Chess; Jeffrey O. Kephart

2004-01-01

250

Tele-robotic/autonomous control using controlshell  

SciTech Connect

A tele-robotic and autonomous controller architecture for waste handling and sorting has been developed which uses tele-robotics, autonomous grasping and image processing. As a starting point, prior work from LLNL and ORNL was restructured and ported to a special real-time development environment. Significant improvements in collision avoidance, force compliance, and shared control aspects were then developed. Several orders of magnitude improvement were made in some areas to meet the speed and robustness requirements of the application.

Wilhelmsen, K.C.; Hurd, R.L.; Couture, S.

1996-12-10

251

Autonomic Computing Paradigm to Support System's Development  

Microsoft Academic Search

Information infrastructure is witnessing an evolution with the advent of Autonomic computing paradigm. Autonomic Computing Systems (ACS) is becoming more real and visible in present-day computing world, thus creating a context-aware-ubiquitous computing environment. Established IT Industry leaders have embraced this approach and a great deal of research and development is happening upon this area. Today, systems have grown large accommodating

Shenin Hassan; Dhiya Al-Jumeily; Abir Jaafar Hussain

2009-01-01

252

Color machine vision for autonomous vehicles  

Microsoft Academic Search

Color can be a useful feature in autonomous vehicle systems that are based on machine vision, for tasks such as obstacle detection, lane\\/road following, and recognition of miscellaneous scene objects. Unfortunately, few existing autonomous vehicle systems use color to its full extent, largely because color-based recognition in outdoor scenes is complicated, and existing color machine-vision techniques have not been shown

Shashi D. Buluswar; Bruce A. Draper

1998-01-01

253

Software control architecture for autonomous vehicles  

Microsoft Academic Search

The Strategic-Tactical-Execution Software Control Architecture (STESCA) is a tri-level approach to controlling autonomous vehicles. Using an object-oriented approach, STESCA has been developed as a generalization of the Rational Behavior Model (RBM). STESCA was initially implemented for the Phoenix Autonomous Underwater Vehicle (Naval Postgraduate School -- Monterey, CA), and is currently being implemented for the Pioneer AT land-based wheeled vehicle. The

Michael L. Nelson; Juan R. Deanda; Richard K. Fox; Xiannong Meng

1999-01-01

254

Autonomous Synchronization of Chemically Coupled Synthetic Oscillators  

Microsoft Academic Search

Synthetic biology has recently provided functional single-cell oscillators. With a few exceptions, however, synchronization\\u000a across a population has not been achieved yet. In particular, designing a cell coupling mechanism to achieve autonomous synchronization\\u000a is not straightforward since there are usually several different design alternatives. Here, we propose a method to mathematically\\u000a predict autonomous synchronization properties, and to identify the network

Moritz Lang; Tatiana T. Marquez-Lago; Jörg Stelling; Steffen Waldherr

255

Autonomous support for microorganism research in space  

Microsoft Academic Search

A preliminary design for performing on orbit, autonomous research on microorganisms and cultured cells\\/tissues is presented. The payload is designed to be compatible with the COMercial Experiment Transporter (COMET), an orbiter middeck locker interface and with Space Station Freedom. Uplink\\/downlink capabilities and sample return through controlled reentry are available for all carriers. Autonomous testing activities are preprogrammed with in-flight reprogrammability.

M. L. Fleet; J. D. Smith; D. M. Klaus; M. W. Luttges

1993-01-01

256

Autonomous intelligent cruise control system  

NASA Astrophysics Data System (ADS)

Autonomous intelligent cruise control (AICC) systems are not only controlling vehicles' speed but acting on the throttle and eventually on the brakes they could automatically maintain the relative speed and distance between two vehicles in the same lane. And more than just for comfort it appears that these new systems should improve the safety on highways. By applying a technique issued from the space research carried out by MATRA, a sensor based on a charge coupled device (CCD) was designed to acquire the reflected light on standard-mounted car reflectors of pulsed laser diodes emission. The CCD is working in a unique mode called flash during transfer (FDT) which allows identification of target patterns in severe optical environments. It provides high accuracy for distance and angular position of targets. The absence of moving mechanical parts ensures high reliability for this sensor. The large field of view and the high measurement rate give a global situation assessment and a short reaction time. Then, tracking and filtering algorithms have been developed in order to select the target, on which the equipped vehicle determines its safety distance and speed, taking into account its maneuvering and the behaviors of other vehicles.

Baret, Marc; Bomer, Thierry T.; Calesse, C.; Dudych, L.; L'Hoist, P.

1995-01-01

257

Autonomous navigation of USAF spacecraft  

NASA Astrophysics Data System (ADS)

Observations from several medium-accuracy space sensors, such as the existing telescopic space sextant are compared with those of future matrix-type sensors. The large field of view of matrix sensors should permit determining the Earth horizon to approximately an order of magnitude better than current infrared sensors by observing atmospheric refraction of stellar light. This horizon determination will give the matrix sensors an accuracy of less than 1 km. The limiting factor in Earth-horizon determination is the modeling of atmospheric refraction effects. For high-accuracy requirements (100 meters or less), the Global Positioning System (GPS) offers the only near-term solution. A relative navigation technique using range and Doppler data is proposed for autonomous navigation of the GPS satellites. The navigation accuracy of this technique is evaluated by considering covariance analysis and by processing corrupted data through a reduced-order onboard sequentially partitioned algorithm. The algorithm is stable and for the GPS system produces in-plane accuracy of 40 meters over twenty days. However, out-of-plane motion is shown to be unobservable in the GPS-to-GPS tracking mode, and errors of up to 1.5 km over 60 days are experienced. For this reason, a supplemental transmitter on the ground or in a different orbit is recommended.

Ferguson, J. R., Jr.

258

Autonomic disturbances in cluster headache.  

PubMed

Ocular sympathetic function, facial flushing and the presence or absence of lachrymation and rhinorrhoea were examined in 30 patients during spontaneous or nitroglycerin-induced cluster headache. In 27 cases measurements were also obtained during the headache-free interval. Ocular sympathetic function was impaired on the symptomatic side between cluster attacks and function was reduced further during cluster headache. Greater heat loss from the orbital region on the symptomatic side was associated with ocular sympathetic dysfunction both during and between attacks, and with lachrymation during attacks. Heat loss from the cheek and side of the nose was greater on the symptomatic side in patients whose attack was accompanied by lachrymation, but heat loss from these areas was unrelated to the extent of ocular sympathetic deficit. These findings suggest that parasympathetic overactivity in the greater superficial petrosal nerve provokes facial flushing and lachrymation. Parasympathetic overactivity could also cause dilatation of the internal carotid artery and compression of the periarterial plexus of sympathetic fibres, producing a sympathetic deficit with release of vasoconstrictor tone in the eye. Thus autonomic disturbances in cluster headache may be explained by the unitary hypothesis of parasympathetic hyperactivity being responsible for ocular sympathetic deficit. PMID:3179690

Drummond, P D

1988-10-01

259

Autonomous microfluidic sensing device employing liquid crystal for detection of biological interactions  

Microsoft Academic Search

We report the design of an autonomous sensing device, which employs a thermotropic nematic liquid crystal (LC) to conduct chemical or biological sensing tasks. The development of highly reproducible methods to create uniform LC thin film is critical for utilizing LCs for sensing. Herein, we describe the use of shear forces generated by the laminar flow of liquid within a

D. Cheng; I. H. Lin; N. L. Abbott; H. Jiang

2009-01-01

260

Carbon Footprint of Energy Consumption and Environmental Impact in Autonomous Regions of China  

Microsoft Academic Search

The research of the relationship between carbon footprint generated by energy consumption and environmental quality could provide scientific basis for the coordinated development of energy, environment and economy. This paper calculated the carbon footprint energy consumption in China's autonomous regions from the perspective of carbon cycle. Meanwhile, it adopts principal component method to make comprehensive evaluation of environmental quality in

Hua Honglian; Tong Yan; Pan Yujun; Zhang Qianduo

2012-01-01

261

A Double-Blind Atropine Trial for Active Learning of Autonomic Function  

ERIC Educational Resources Information Center

|Here, we describe a human physiology laboratory class measuring changes in autonomic function over time in response to atropine. Students use themselves as subjects, generating ownership and self-interest in the learning as well as directly experiencing the active link between physiology and pharmacology in people. The class is designed to…

Fry, Jeffrey R.; Burr, Steven A.

2011-01-01

262

Utilization of 3D imaging flash lidar technology for autonomous safe landing on planetary bodies  

Microsoft Academic Search

NASA considers Flash Lidar a critical technology for enabling autonomous safe landing of future large robotic and crewed vehicles on the surface of the Moon and Mars. Flash Lidar can generate 3-Dimensional images of the terrain to identify hazardous features such as craters, rocks, and steep slopes during the final stages of descent and landing. The onboard flight comptuer can

Farzin Amzajerdian; Michael Vanek; Larry Petway; Diego Pierrottet; George Busch; Alexander Bulyshev

2010-01-01

263

Internal resonance in an autonomous Hamiltonian system close to a system with a cyclic coordinate  

Microsoft Academic Search

The motion of an autonomous Hamiltonian system with two degrees of freedom, close to a system with a cyclic coordinate, is considered. It is assumed that the generating system admits of a steady rotation, the corresponding equilibrium position of the reduced system being stable in the linear approximation. It is also assumed that there is an internal resonance in the

O. V. Kholostova

2002-01-01

264

A real-time distributed software infrastructure for cooperating mobile autonomous robots  

Microsoft Academic Search

Cooperating mobile autonomous robots have been generating a growing interest in fields such as rescue, demining and security. These applications require a real time middleware and wireless communication protocol that can effecient and timely support the fusion of the distributed perception and the development of coordinated behaviors. This paper proposes an affordable middleware, based on low-cost and open-source COTS technologies,

Frederico Santos; L. Almeida; P. Pedreiras; L. S. Lopes

2009-01-01

265

A Double-Blind Atropine Trial for Active Learning of Autonomic Function  

ERIC Educational Resources Information Center

Here, we describe a human physiology laboratory class measuring changes in autonomic function over time in response to atropine. Students use themselves as subjects, generating ownership and self-interest in the learning as well as directly experiencing the active link between physiology and pharmacology in people. The class is designed to…

Fry, Jeffrey R.; Burr, Steven A.

2011-01-01

266

Adults' Autonomic and Subjective Emotional Responses to Infant Vocalizations: The Role of Secure Base Script Knowledge  

ERIC Educational Resources Information Center

|This article examines the extent to which secure base script knowledge--as reflected in an adult's ability to generate narratives in which attachment-related threats are recognized, competent help is provided, and the problem is resolved--is associated with adults' autonomic and subjective emotional responses to infant distress and nondistress…

Groh, Ashley M.; Roisman, Glenn I.

2009-01-01

267

Optimizing LV Voltage Profile by Intelligent MV Control in Autonomously Controlled Networks  

Microsoft Academic Search

The increase of distributed power generation can result in equilibrium of local produced and consumed electrical energy. Power electronics and storage can transform networks in which such equilibrium exists into autonomously controlled networks. These networks remain part of the rest of the power grid. An example of such a network contains several MV feeders and their LV networks. One of

Frans Provoost; Johanna M. A. Myrzik; Wil L. Kling

2006-01-01

268

Design and development of a fully autonomous decimeter-scale humanoid robot  

Microsoft Academic Search

A decimeter-scale humanoid robot is proposed and realized in this paper. The humanoid robot is fully autonomous in terms of sensing, processing and power supply. In addition, the robot has a low cost design. Sensing capabilities are provided by a camera and computer vision algorithms. Processing power is provided by a PC\\/104. Robot gait generation is based in sinusoid wave

T. Cerdefia; Y. Callero; D. Perea; P. Betancor; D. Lutzardo; J. Toledo; L. Acosta

2009-01-01

269

Ultrafast physical generation of random numbers using hybrid Boolean networks  

NASA Astrophysics Data System (ADS)

We describe a high-speed physical random number generator based on a hybrid Boolean network with autonomous and clocked logic gates, realized on a reconfigurable chip. The autonomous logic gates are arranged in a bidirectional ring topology and generate broadband chaos. The clocked logic gates receive input from the autonomous logic gates so that random numbers are generated physically that pass standard randomness tests without further postprocessing. The large number of logic gates on reconfigurable chips allows for parallel generation of random numbers, as demonstrated by our implementation of 128 physical random number generators that achieve a real-time bit rate of 12.8Gbits/s.

Rosin, David P.; Rontani, Damien; Gauthier, Daniel J.

2013-04-01

270

Self-Consciousness and Self-Presentation: Being Autonomous Versus Appearing Autonomous  

Microsoft Academic Search

Privately self-conscious people may resist social pressures because (a) they tune out the social matrix and express their beliefs irrespective of how they make them appear to an audience (the social obliviousness hypothesis) or (b) they prefer to create an identity of being autonomous and will monitor and control their self-presentations to construct this image for audiences (the autonomous identity

Barry R. Schlenker; Michael F. Weigold

1990-01-01

271

Agency Autonomization in Korea: Some Issues in Cross-polity Transfer of Agency Autonomization  

Microsoft Academic Search

This paper describes some of the issues surrounding South Korea's introduction of autonomous executive agencies as one component of its new public management (NPM) reform. Particular emphasis is given to some problems and critiques surrounding implementation. The research defines the concept of autonomous public agencies, explains why South Korea's government embraced the concept, and analyzes some critiques of its deployment.

Dong-Young Rhee; Hindy Lauer Schachter

2010-01-01

272

PRIMUS: an autonomous driving robot  

NASA Astrophysics Data System (ADS)

In the experimental program PRIMUS (PRogram of Intelligent Mobile Unmanned Systems) there shall be shown the autonomous driving of an unmanned robot in open terrain. The goal is to achieve the most possible degree of autonomy. A small tracked vehicle (Wiesel 2) is used as a robot vehicle. This tank is configured as a 'drive by wire'-system and is therefore well suited for the adaption of control computers. For navigation and orientation in open terrain a sensor package is integrated. To detect obstacles the scene in the driving corridor of the robot is scanned 4 times per second by a 3D- Range image camera (LADAR). The measured 3D-range image is converted into a 2D-obstacle map and used as input for calculation of an obstacle free path. The combination of local navigation (obstacle avoidance) and global navigation leads to a collision free driving in open terrain to a predefined goal point with a velocity of up to 25 km/h. In addition a contour tracker with a TV-camera as sensor is implemented which allows to follow contours (edge of a meadow) or to drive on paved and unpaved roads with a velocity up to 50 km/h. Because of the driving in open terrain there are given high demands on the real time implementation of all the sub-functions in the system. For the most part the described functions will be coded in the programming language Ada. The software will be embedded in a distributed VMEbus-based multicomputer- /multiprocessor system. Up to 20 PowerP 603 and some 68030/40- CPUs are used to build up a high performance computer system. The Hardware (HW) is adapted to the environmental conditions of the tracked vehicle.

Schwartz, Ingo

1999-07-01

273

Onboard autonomous mineral detectors for Mars rovers  

NASA Astrophysics Data System (ADS)

Mars rovers and orbiters currently collect far more data than can be downlinked to Earth, which reduces mission science return; this problem will be exacerbated by future rovers of enhanced capabilities and lifetimes. We are developing onboard intelligence sufficient to extract geologically meaningful data from spectrometer measurements of soil and rock samples, and thus to guide the selection, measurement and return of these data from significant targets at Mars. Here we report on techniques to construct mineral detectors capable of running on current and future rover and orbital hardware. We focus on carbonate and sulfate minerals which are of particular geologic importance because they can signal the presence of water and possibly life. Sulfates have also been discovered at the Eagle and Endurance craters in Meridiani Planum by the Mars Exploration Rover (MER) Opportunity and at other regions on Mars by the OMEGA instrument aboard Mars Express. We have developed highly accurate artificial neural network (ANN) and Support Vector Machine (SVM) based detectors capable of identifying calcite (CaCO3) and jarosite (KFe3(SO4)2(OH)6) in the visible/NIR (350-2500 nm) spectra of both laboratory specimens and rocks in Mars analogue field environments. To train the detectors, we used a generative model to create 1000s of linear mixtures of library end-member spectra in geologically realistic percentages. We have also augmented the model to include nonlinear mixing based on Hapke's models of bidirectional reflectance spectroscopy. Both detectors perform well on the spectra of real rocks that contain intimate mixtures of minerals, rocks in natural field environments, calcite covered by Mars analogue dust, and AVIRIS hyperspectral cubes. We will discuss the comparison of ANN and SVM classifiers for this task, technical challenges (weathering rinds, atmospheric compositions, and computational complexity), and plans for integration of these detectors into both the Coupled Layer Architecture for Robotic Autonomy (CLARAty) system and the Onboard Autonomous Science Investigation System (OASIS) at JPL.

Gilmore, M. S.; Bornstein, B.; Castano, R.; Merrill, M.; Greenwood, J.

2005-12-01

274

Controlling autonomous underwater floating platforms using bacterial fermentation.  

PubMed

Biogenic gas has a wide range of energy applications from being used as a source for crude bio-oil components to direct ignition for heating. The current study describes the use of biogenic gases from Clostridium acetobutylicum for a new application-renewable ballast regeneration for autonomous underwater devices. Uninterrupted (continuous) and blocked flow (pressurization) experiments were performed to determine the overall biogas composition and total volume generated from a semirigid gelatinous matrix. For stopped flow experiments, C. acetobutylicum generated a maximum pressure of 55 psi over 48 h composed of 60 % hydrogen gas when inoculated in a 5 % agar (w/v) support with 5 % glucose (w/v) in the matrix. Typical pressures over 24 h at 318 K ranged from 10 to 33 psi. These blocked flow experiments show for the first time the use of microbial gas production as a way to repressurize gas cylinders. Continuous flow experiments successfully demonstrated how to deliver biogas to an open ballast control configuration for deployable underwater platforms. This study is a starting point for engineering and microbiology investigations of biogas which will advance the integration of biology within autonomous systems. PMID:22851013

Biffinger, Justin C; Fitzgerald, Lisa A; Howard, Erinn C; Petersen, Emily R; Fulmer, Preston A; Wu, Peter K; Ringeisen, Bradley R

2012-08-01

275

Autonomic involvement in subacute and chronic immune-mediated neuropathies.  

PubMed

Autonomic function can be impaired in many disorders in which sympathetic, parasympathetic, and enteric arms of the autonomic nervous system are affected. Signs and symptoms of autonomic involvement are related to impairment of cardiovascular, gastrointestinal, urogenital, thermoregulatory, sudomotor, and pupillomotor autonomic functions. Availability of noninvasive, sensitive, and reproducible tests can help to recognize these disorders and to better understand specific mechanisms of some, potentially treatable, immune-mediated autonomic neuropathies. This paper describes autonomic involvement in immune-mediated neuropathies with a subacute or chronic course. PMID:23853716

Mazzeo, Anna; Stancanelli, Claudia; Di Leo, Rita; Vita, Giuseppe

2013-06-18

276

Diabetic Autonomic Imbalance and Glycemic Variability  

PubMed Central

Diabetic autonomic neural imbalance is a severe complication of long-term diabetes patients and may progress to diabetic autonomic neuropathy (DAN). The prevalence of DAN is reported to be between 20 and 70%, depending on the studies. The pathogenesis of DAN remains unresolved. However, emerging evidence suggests that glycemic variability (GV) may be associated with autonomic imbalance in patients with both type 1 and type 2 diabetes. As symptoms are initially weak and uncharacteristic, the condition often remains undiagnosed until late manifestations present themselves. Predominant symptoms may include nausea, vomiting, gastroparesis, involuntary diarrhea, postural hypotension, voiding difficulties, and sexual dysfunction. Analyzing the patterns of heart rate variability carries the potential for detection of autonomic imbalance in the subclinical and asymptomatic stages. In this context, GV may affect the sympathovagal balance by increasing oxidative stress and proinflammatory cytokines. Establishing a GV risk profile could therefore be important in determining risk factors in diabetes patients. This review addresses the issues above and in particular the possible association between diabetic autonomic imbalance and GV.

Fleischer, Jesper

2012-01-01

277

Marine animals: the next generation of autonomous underwater vehicle?  

Microsoft Academic Search

Advances in animal tag technologies now offer a significant method for gathering oceanographic information throughout the world's oceans. By employing marine organisms as oceanic samplers (MOOS), vast amounts of in situ data (e.g. temperature, productivity and salinity in relation to depth and location) can be archived and transmitted via satellite or obtained directly from the tag if the tag is

T. M. Thys; B. W. Hobson; H. Dewar

2001-01-01

278

Towards Automated Code Generation for Autonomous Mobile Robots  

Microsoft Academic Search

With the expected growth in mobile robotics the de- mand for expertise to develop robot control code will also increase. As end-users cannot be expected to de- velop this control code themselves, a more elegant solu- tion would be to allow the end-users to teach the robot by demonstrating the task. In this paper we show how route learning tasks

D. Kerr; U. Nehmzow; S. A. Billings

279

A Collaborative Knowledge Plane for Autonomic Networks  

NASA Astrophysics Data System (ADS)

Autonomic networking aims to give network components self-managing capabilities. Several autonomic architectures have been proposed. Each of these architectures includes sort of a knowledge plane which is very important to mimic an autonomic behavior. Knowledge plane has a central role for self-functions by providing suitable knowledge to equipment and needs to learn new strategies for more accuracy.However, defining knowledge plane's architecture is still a challenge for researchers. Specially, defining the way cognitive supports interact each other in knowledge plane and implementing them. Decision making process depends on these interactions between reasoning and learning parts of knowledge plane. In this paper we propose a knowledge plane's architecture based on machine learning (inductive logic programming) paradigm and situated view to deal with distributed environment. This architecture is focused on two self-functions that include all other self-functions: self-adaptation and self-organization. Study cases are given and implemented.

Mbaye, Maïssa; Krief, Francine

280

Autonomic regulation in fragile X syndrome.  

PubMed

Autonomic reactivity was studied in individuals with fragile X syndrome (FXS), a genetic disorder partially characterized by abnormal social behavior. Relative to age-matched controls, the FXS group had faster baseline heart rate and lower amplitude respiratory sinus arrhythmia (RSA). In contrast to the typically developing controls, there was a decrease in RSA with age within the FXS group. Moreover, within the FXS group heart rate did not slow with age. The FXS group also responded with an atypical increase in RSA to the social challenge, while the control group reduced RSA. In a subset of the FXS group, the autonomic profile did not change following 2 months and 1 year of lithium treatment. The observed indices of atypical autonomic regulation, consistent with the Polyvagal Theory, may contribute to the deficits in social behavior and social communication observed in FXS. PMID:21547900

Heilman, Keri J; Harden, Emily R; Zageris, Danielle M; Berry-Kravis, Elizabeth; Porges, Stephen W

2011-05-05

281

Technology readiness level six and autonomous mobility  

NASA Astrophysics Data System (ADS)

During FY03, the U.S. Army Research Laboratory undertook a series of experiments designed to assess the maturity of autonomous mobility technology for the Future Combat Systems Armed Robotic Vehicle concept. The experiments assessed the technology against a level 6 standard in the technology readiness level (TRL) maturation schedule identified by a 1999 Government Accounting Office report. During the course of experimentation, 646 missions were conducted over a total distance of ~560 km and time of ~100 hr. Autonomous operation represented 96% and 88% of total distance and time, respectively. To satisfy the TRL 6 "relevant environment" standard, several experimental factors were varied over the three-site test as part of a formal, statistical, experimental design. This paper reports the specific findings pertaining to relevant-environment questions that were posed for the study and lends additional support to the Lead System Integrator decision that TRL 6 has been attained for the autonomous navigation system.

Bodt, Barry A.; Camden, Rick S.

2004-09-01

282

Spontaneous brain activity relates to autonomic arousal  

PubMed Central

Although possible sources and functions of the resting state networks (RSN) of the brain have been proposed, most evidence relies on circular logic and reverse inference. We propose that autonomic arousal provides an objective index of psychophysiological states during rest that may also function as a driving source of the activity and connectivity of RSN. Recording blood oxygenation level-dependent (BOLD) signal using functional magnetic resonance imaging and skin conductance simultaneously during rest in human subjects, we found that the spontaneous fluctuations of BOLD signals in key nodes of RSN are associated with changes in non-specific skin conductance response, a sensitive psychophysiological index of autonomic arousal. Our findings provide evidence of an important role for the autonomic nervous system to the spontaneous activity of the brain during ‘rest’.

Fan, Jin; Xu, Pengfei; Van Dam, Nicholas T.; Eilam-Stock, Tehila; Gu, Xiaosi; Luo, Yuejia; Hof, Patrick R.

2012-01-01

283

Magnetocardiographic QT dispersion during cardiovascular autonomic function tests.  

PubMed

QT dispersion is considered to reflect nonhomogeneity of ventricular repolarization. The autonomic nervous system modulates QT interval duration, but the effect may not be spatially homogenous. Magnetocardiography (MCG) registers the weak magnetic fields generated by myocardial electric currents with high localizing accuracy. We studied the effects of rapid cardiovascular autonomic nervous adjustment on QT dispersion in MCG. Ten healthy male volunteers were monitored during deep breathing, the Valsalva maneuver, sustained handgrip, hyperventilation, the cold pressor test and mental stress. 67 MCG channels and 12 ECG leads were recorded simultaneously. A computer algorithm was used for QT interval measurements. QT dispersion was defined as maximum - minimum or standard deviation of the QTpeak and QTend intervals. In MCG the QT(end) dispersion increased during deep inspiration compared with deep expiration (96+/-19 ms v. 73+/-27 ms, p = 0.05). Magnetic QT dispersion tended to increase during the bradycardia phase of the Valsalva maneuver, but the change was obvious only for QT(end) (55+/-26 ms v. 76+/-29 ms, p<0.05). Other tests had no significant effect on QT dispersion, not even the cold pressor test, although it causes strong sympathetic activation. Magnetic and electric QT(peak) and QT(end) intervals correlated closely (r = 0.93 and 0.91), whereas the QT dispersion measures showed no correlation. In conclusion, magnetic QT dispersion is not modified by rapid changes in autonomic tone, but maneuvers involving deep respiratory efforts and changes in ventricular loading affect QT dispersion measurements. PMID:11099171

Haapalahti, P; Mäkijärvi, M; Korhonen, P; Takala, P; Montonen, J; Salorinne, Y; Oikarinen, L; Viitasalo, M; Toivonen, L

2000-10-01

284

NEURON: Enabling Autonomicity in Wireless Sensor Networks  

PubMed Central

Future Wireless Sensor Networks (WSNs) will be ubiquitous, large-scale networks interconnected with the existing IP infrastructure. Autonomic functionalities have to be designed in order to reduce the complexity of their operation and management, and support the dissemination of knowledge within a WSN. In this paper a novel protocol for energy efficient deployment, clustering and routing in WSNs is proposed that focuses on the incorporation of autonomic functionalities in the existing approaches. The design of the protocol facilitates the design of innovative applications and services that are based on overlay topologies created through cooperation among the sensor nodes.

Zafeiropoulos, Anastasios; Gouvas, Panagiotis; Liakopoulos, Athanassios; Mentzas, Gregoris; Mitrou, Nikolas

2010-01-01

285

Advanced control architecture for autonomous vehicles  

NASA Astrophysics Data System (ADS)

An advanced control architecture for autonomous vehicles is presented. The hierarchical architecture consists of four levels: a vehicle level, a control level, a rule-based level and a knowledge-based level. A special focus is on forms of internal representation, which have to be chosen adequately for each level. The control scheme is applied to VaMP, a Mercedes passenger car which autonomously performs missions on German freeways. VaMP perceives the environment with its sense of vision and conventional sensors. It controls its actuators for locomotion and attention focusing. Modules for perception, cognition and action are discussed.

Maurer, Markus; Dickmanns, Ernst D.

1997-06-01

286

Thermal, Autonomous Replicator Made from Transfer RNA  

NASA Astrophysics Data System (ADS)

Evolving systems rely on the storage and replication of genetic information. Here we present an autonomous, purely thermally driven replication mechanism. A pool of hairpin molecules, derived from transfer RNA replicates the succession of a two-letter code. Energy is first stored thermally in metastable hairpins. Thereafter, energy is released by a highly specific and exponential replication with a duplication time of 30 s, which is much faster than the tendency to produce false positives in the absence of template. Our experiments propose a physical rather than a chemical scenario for the autonomous replication of protein encoding information in a disequilibrium setting.

Krammer, Hubert; Möller, Friederike M.; Braun, Dieter

2012-06-01

287

Sensorpedia: Information Sharing Across Autonomous Sensor Systems  

SciTech Connect

The concept of adapting social media technologies is introduced as a means of achieving information sharing across autonomous sensor systems. Historical examples of interoperability as an underlying principle in loosely-coupled systems is compared and contrasted with corresponding tightly-coupled, integrated systems. Examples of ad hoc information sharing solutions based on Web 2.0 social networks, mashups, blogs, wikis, and data tags are presented and discussed. The underlying technologies of these solutions are isolated and defined, and Sensorpedia is presented as a formalized application for implementing sensor information sharing across large-scale enterprises with incompatible autonomous sensor systems.

Gorman, Bryan L [ORNL; Resseguie, David R [ORNL; Tomkins-Tinch, Christopher H [ORNL

2009-01-01

288

An autonomous shunt circuit for vibration damping  

NASA Astrophysics Data System (ADS)

This paper describes the implementation of an autonomous switching resistor-inductor (R-L) shunt circuit for the control of structure vibration. The resulting switch shunt circuit, compared to present shunt circuit techniques, does not require a power for its operation and is almost as effective. Moreover, experiments show that the damping performance is robust against temperature variations due to environmental conditions, whereas present shunt circuits lose their damping performance. The proposed autonomous switching R-L shunt circuit requires a small number of electronic components, therefore making it a viable and effective solution for the control of structural vibration.

Niederberger, Dominik; Morari, Manfred

2006-04-01

289

Apoptosis and Self-Destruct: A Contribution to Autonomic Agents.  

National Technical Information Service (NTIS)

Autonomic Computing (AC), a self-managing systems initiative based on the biological metaphor of the autonomic nervous system, is increasingly gaining momentum as the way forward in designing reliable systems. Agent technologies have been identiiied as a ...

R. Sterritt M. Hinchey

2005-01-01

290

Battle Management Algorithms for Autonomous Unmanned Systems (BMAAUS).  

National Technical Information Service (NTIS)

Autonomous agents are self-directed, independent entities that interact with an environment by in-taking percepts through sensing devices and by acting on the environment through effectors. This work centers on autonomous entities in an adversarial enviro...

J. Seitzer

2003-01-01

291

Control of Artificial Hearts Using Autonomic Nervous Signals.  

National Technical Information Service (NTIS)

In order to develop an artificial heart system capable of being controlled by autonomic nervous signals, we have studied the methods of long- term stable recording of autonomic nervous signals and algorithms to utilize those signals to control an artifici...

T. Suzuki M. Mitsui F. Inagaki M. Ohkura T. Saito

2001-01-01

292

Vision-Based Navigation for Autonomous Ground Vehicles.  

National Technical Information Service (NTIS)

The project to date has focused on three tasks: (1) Support of Martin Marietta as the Autonomous Land Vehicle (ALV) integrating contractor, (2) development of a vision system for autonomous navigation of roads and road networks, and (3) experiments using ...

L. Davis

1986-01-01

293

A Multi-Agent Systems Approach to Autonomic Computing  

Microsoft Academic Search

The goal of autonomic computing is to create computing systems capable of managing themselves to a far greater extent than they do today. This paper presents Unity, a decentralized architecture for autonomic computing based on multiple interacting agents called autonomic elements. We illustrate how the Unity architecture realizes a number of desired autonomic system behaviors including goal-driven self-assembly, self-healing, and

Gerald Tesauro; David M. Chess; William E. Walsh; Rajarshi Das; Alla Segal; Ian Whalley; Jeffrey O. Kephart; Steve R. White

2004-01-01

294

Autonomic dysfunction in Parkinson's disease: a comprehensive symptom survey  

Microsoft Academic Search

Background: Autonomic dysfunction occurs in Parkinson's disease (PD), but few studies have addressed it in a comprehensive manner.Methods: Autonomic symptoms were evaluated by a questionnaire in sixty-eight subjects (44 patients and 24 controls).Results: PD patients experienced higher frequency and severity of autonomic dysfunction. When all autonomic symptoms were pooled into an aggregate score, differences between patients and controls were highly

M. F Siddiqui; S Rast; M. J Lynn; A. P Auchus; R. F Pfeiffer

2002-01-01

295

Quantitative autonomic testing in the management of botulism  

Microsoft Academic Search

Even with mild neurological signs, patients with botulism frequently complain of autonomic symptoms. This study aimed at the\\u000a evaluation of sudomotor and cardiovascular reflex functions by quantitative autonomic testing (QAT), which may identify patients\\u000a with autonomic involvement but otherwise benign clinical presentation. Five patients with food-borne botulism were subjected\\u000a to a structured questionnaire on autonomic symptoms, cardiac and neurological examination,

Raffi Topakian; Christoph Heibl; Karl Stieglbauer; Bettina Dreer; Markus Nagl; Peter Knoflach; Franz Thaddäus Aichner

2009-01-01

296

Clinical laboratory evaluation of autoimmune autonomic ganglionopathy: Preliminary observations  

Microsoft Academic Search

Several forms of chronic autonomic failure manifest as neurogenic orthostatic hypotension, including autoimmune autonomic ganglionopathy (AAG) and pure autonomic failure (PAF). AAG and PAF are thought to differ in pathogenesis, AAG reflecting decreased ganglionic neurotransmission due to circulating antibodies to the neuronal nicotinic receptor and PAF being a Lewy body disease with prominent loss of sympathetic noradrenergic nerves. AAG therefore

David S. Goldstein; Courtney Holmes; Richard Imrich

2009-01-01

297

Development of a control system for an Autonomous Underwater Vehicle  

Microsoft Academic Search

This work proposes the development of a control system for an autonomous underwater vehicle dedicated to the observation of the oceans. The vehicle, a hybrid between Autonomous Underwater Vehicles (AUVs) and Autonomous Surface Vehicles (ASV), moves on the surface of the sea and makes vertical immersions to obtain profiles of a water column, according to a pre-established plan. The displacement

I. Masmitja; G. Masmitja; J. Gonzalez; S. Shariat-Panahi; S. Gomariz

2010-01-01

298

Research issues in autonomous control of tactical UAVs  

Microsoft Academic Search

This paper summarizes the enabling technologies for an autonomous tactical unmanned aerial vehicle (UAV). Current technologies are adequate for semi-autonomous UAVs that operate in a relatively structured environment. For tactical UAVs in a rapidly changing uncertain environment the present techniques are inadequate. The essence of autonomous control is rapid in-flight replanning under uncertainty. This is cast as a large optimization

P. R. Chandler; M. Pachter

1998-01-01

299

Pediatric Autonomic Testing: Retrospective Review of a Large Series  

Microsoft Academic Search

Objective. To describe the reasons for referral, autonomic diagnoses, test results, and patient management in a large pediatric population referred for testing for an autonomic disorder. Design. The authors reviewed autonomic testing data and medical records for patients aged 18 years and younger who underwent testing between 1993 and 2007 and who had adequate clinical data. Relevance of test results

Devraj Sukul; Thomas C. Chelimsky; Gisela Chelimsky

2012-01-01

300

A Comprehensive Evaluation on China's EFL Learners' Autonomous Learning Competence  

Microsoft Academic Search

There have been numerous studies on autonomous learning competence, but most of them deal principally with the introduction and analysis of the theoretical background, application, strategy implementation and course design principles for autonomous language learning. So far no effort has been made to construct an evaluation index system and evaluation model to evaluate EFL learners' autonomous English learning competence in

Weiping Wu; Jinfen Xu

2010-01-01

301

Sliding mode control for a near space autonomous airship  

Microsoft Academic Search

The near space autonomous airship represents a unique and promising solution for many applications ranging from surveillance, communication utilities and scientific exploration. In attempt to complete the various missions, the near space airship first requires an accurate control system for autonomous flight. This paper presents an improved sliding mode control method for autonomous flight, considering the characteristics of nonlinearity, strong

Yueneng Yang; Wei Zheng; Jie Wu

2011-01-01

302

Emergence as a General Architecture for Distributed Autonomic Computing  

Microsoft Academic Search

Today's systems are becoming more and more complex, i.e. dis- tributed, situated, open, and dynamic. Autonomic computing aims to deal with the complexity autonomously. Hence, distributed auto- nomic computing systems tend to consist out of autonomous entities because of the increased distribution. This increased complexity and autonomy makes it dicult to build systems with a global coherent behaviour as a

Tom De Wolf; Tom Holvoet

303

Semantic-Based Policy Engineering for Autonomic Systems  

Microsoft Academic Search

This paper presents some important directions in the use of ontology- based semantics in achieving the vision of Autonomic Communications. We examine the requirements of Autonomic Communication with a focus on the demanding needs of ubiquitous computing environments, with an emphasis on the requirements shared with Autonomic Computing. We observe that ontologies provide a strong mechanism for addressing the heterogeneity

David Lewis; Kevin Feeney; Kevin Carey; Thanassis Tiropanis; Simon Courtenage

2004-01-01

304

Development of a visually-guided autonomous underwater vehicle  

Microsoft Academic Search

We are developing autonomous underwater vehicles for exploration and inspection tasks. Our objectives are to enable these submersible robots to autonomously search in regular patterns, follow along fixed natural and artificial features, and swim after dynamic targets. We have developed a method of visually-guiding autonomous land vehicles using correlation-based feature tracking to follow targets of interest. We have used this

David Wettergreen; Chris Gaskett; Alex Zelinsky

1998-01-01

305

A transportable neural-network approach to autonomous vehicle following  

Microsoft Academic Search

This paper presents the development and testing of a neural-network module for autonomous vehicle following. Autonomous vehicle following is defined as a vehicle changing its own steering and speed while following a lead vehicle. The strength of the developed controller is that no characterization of the vehicle dynamics is needed to achieve autonomous operation. As a result, it can be

Nasser Kehtarnavaz; N. Groswold; Kelly Miller; P. Lascoe

1998-01-01

306

Template-based autonomous navigation in urban environments  

Microsoft Academic Search

Autonomous navigation is a fundamental task in mobile robotics. In the last years, several approaches have been addressing the autonomous navigation in outdoor environments. Lately it has also been extended to robotic vehicles in urban environments. This paper focus in the road identification problem, which is an important capability to autonomous vehicle drive. Our approach is based on image processing,

Jefferson R. Souza; Daniel O. Sales; Patrick Yuri Shinzato; Fernando Santos Osório; Denis F. Wolf

2011-01-01

307

Autonomous self-organizing resource manager for multiple networked platforms  

NASA Astrophysics Data System (ADS)

A fuzzy logic based expert system for resource management has been developed that automatically allocates electronic attack (EA) resources in real-time over many dissimilar autonomous naval platforms defending their group against attackers. The platforms can be very general, e.g., ships, planes, robots, land based facilities, etc. Potential foes the platforms deal with can also be general. This paper provides an overview of the resource manager including the four fuzzy decision trees that make up the resource manager; the fuzzy EA model; genetic algorithm based optimization; co-evolutionary data mining through gaming; and mathematical, computational and hardware based validation. Methods of automatically designing new multi-platform EA techniques are considered. The expert system runs on each defending platform rendering it an autonomous system requiring no human intervention. There is no commanding platform. Instead the platforms work cooperatively as a function of battlespace geometry; sensor data such as range, bearing, ID, uncertainty measures for sensor output; intelligence reports; etc. Computational experiments will show the defending networked platform's ability to self- organize. The platforms' ability to self-organize is illustrated through the output of the scenario generator, a software package that automates the underlying data mining problem and creates a computer movie of the platforms' interaction for evaluation.

Smith, James F.

2002-08-01

308

Autonomous construction of indoor maps with a mobile robot  

NASA Astrophysics Data System (ADS)

In this paper, we introduce an autonomous map-building technique for mobile robots, based on combinatorial maps. Existing representations of the environment traditionally fall into two distinct categories: metric or topological. Topological approaches are usually well-adapted to global planning and navigation tasks. However, metric maps are easier to read for a human operator and they are better suited to precise robot positioning. Among them, we can distinguish feature-based and area-based maps. Our model enables us to combine the orthogonal strengths of these various representations in a rather compact and efficient way, using an algebraic tool named combinatorial map. We propose a global framework to deal with topological and geometric uncertainties, and a whole strategy for the autonomous generation of 2D combinatorial maps of the environment. The main innovation lies in the way local free space is fused into the global model in order to correct both the position and the topology of obstacles. We extend the notion of discrete and regular occupancy grid to any kind of polygonal subdivision, with cells of variable shapes and dimensions. To conclude, we describe experiments conducted with a real-world robot moving about within a well-structured indoor environment.

Dufourd, Delphine

2001-09-01

309

Autonomous buoy for offshore well control and monitoring  

SciTech Connect

Conventional subsea control systems require expensive electrohydraulic umbilicals that limit the maximum distance between platform and well. A proposed control-buoy concept is a hybrid well-control system with the reliability of conventional umbilical-based systems and the long-distance cost advantages of umbilical-free systems. Well 4-ALS-39 is a marginal gas well off-shore the state of Alagoas, northeast Brazil, in 25-m-deep water. Its production development became economically feasible with the use of an autonomous control buoy for well control and monitoring. A control and data-acquisition system installed on the buoy monitors wellhead pressure and temperature and controls the wet-Christmas-tree valves and production choke through a conventional electrohydraulic umbilical. A radio link between the buoy and shore ensures permanent supervision and interlock with the onshore pipeline valves and metering station. Because the onshore plant is normally unmanned, a dialed cellular-telephone line allows remote well monitoring and operation. The small buoy is completely autonomous in terms of energy. All energy required to power the system is generated locally by solar panels and a low-power, electrically driven hydraulic-power unit.

NONE

1998-08-01

310

Tethered Operation of Autonomous Aerial Vehicles to Provide Extended Field of View for Autonomous Ground Vehicles.  

National Technical Information Service (NTIS)

This thesis was part of the ongoing research conducted at the Naval Postgraduate School to achieve greater collaboration between heterogeneous autonomous vehicles. The research addresses optimal control issues in the collaboration between an Unmanned Aeri...

N. S. Phang

2006-01-01

311

Autonomic dysfunction in Guillain-Barré syndrome  

Microsoft Academic Search

The following tests of autonomic function were performed on seven patients with the Guillain-Barré syndrome and compared with controls: (1) measurement of heart rate and blood pressure in the supine and erect positions, (2) measurement of baroreflex sensitivity, (3) Valsalva's manoeuvre, (4) sweat test. In two patients the heart rates were fixed and greater than 100\\/min and in three there

R R Tuck; J G McLeod

1981-01-01

312

Autonomous Computer Controlled Ice Drill Perfomance Tests  

Microsoft Academic Search

A series of tests of the Advanced Development Model (ADM) thermal ice drill, were conducted at the U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, New Hampshire, during August of 1982, as part of the Arctic Air Deployed Oceanographic Mooring (ADOM) project. The drill is part of an autonomous system intended to facilitate the collection of oceanographic data in

C. Beverly

1983-01-01

313

Love Alters Autonomic Reactivity to Emotions  

Microsoft Academic Search

Periods of bond formation are accompanied by physiological and emotional changes, yet, little is known about the effects of falling in love on the individual's physiological response to emotions. We examined autonomic reactivity to the presentation of negative and positive films in 112 young adults, including 57 singles and 55 new lovers who began a romantic relationship 2.5 months prior

Inna Schneiderman; Yael Zilberstein-Kra; James F. Leckman; Ruth Feldman

2011-01-01

314

Organ Transplantation in the Madrid Autonomous Region  

Microsoft Academic Search

The Madrid Autonomous Region, a Spanish area with 6,200,000 inhabitants, has 7 hospitals authorized for organ transplantation, with 25 active programs for carrying out various transplantations: 18 for adults and 7 for children. Most of these hospitals are reference transplant centers for other Spanish regions. Between 715 and 760 transplantations are performed annually, which represents between 19% and 22% of

C. Chamorro; M. Aparicio; G. Marmisa; J. L. Martinez-Urrialde

2009-01-01

315

An autonomous bladder pressure monitoring system  

Microsoft Academic Search

This paper reports on the development of an autonomous monitoring system, capable of continuously measuring the pressure inside the bladder. The capsule features wireless bi-directional communication and can be inductively powered anywhere inside the bladder. Short-circuiting the resonant LC tank for the data transmission maximizes the operating range of the passive telemetry. A novel clock extraction method is presented, based

J. Coosemans; R. Puers

2005-01-01

316

Longitudinal headway control of autonomous vehicles  

Microsoft Academic Search

This paper is concerned with the development of a longitudinal controller for headway regulation of autonomous vehicles on highways. A supervisory hybrid controller is developed to switch between different control actions to implement a smooth intelligent cruise control (ICC) structure. Different decision regions are defined on the phase plane such that human driver actions are emulated as closely as possible.

C. Hatipoglu; U. Ozguner; Martin Sommerville

1996-01-01

317

Autonomic control of cardiovascular reflexes in narcolepsy  

Microsoft Academic Search

Six male patients with narcolepsy for several years, were studied without and with amphetamine in order to evaluate possible abnormalities in autonomic control of the cardiovascular system. Studies were made of (1) heart rate and blood flow in the resting forearm during contralateral isometric handgrip, (2) respiratory sinus arrhythmia and (3) heart rate response to the Valsalva manoeuvre. The patients

C Sachs; L Kaijser

1980-01-01

318

Autonomous biomorphic robots as platforms for sensors  

SciTech Connect

The idea of building autonomous robots that can carry out complex and nonrepetitive tasks is an old one, so far unrealized in any meaningful hardware. Tilden has shown recently that there are simple, processor-free solutions to building autonomous mobile machines that continuously adapt to unknown and hostile environments, are designed primarily to survive, and are extremely resistant to damage. These devices use smart mechanics and simple (low component count) electronic neuron control structures having the functionality of biological organisms from simple invertebrates to sophisticated members of the insect and crab family. These devices are paradigms for the development of autonomous machines that can carry out directed goals. The machine then becomes a robust survivalist platform that can carry sensors or instruments. These autonomous roving machines, now in an early stage of development (several proof-of-concept prototype walkers have been built), can be developed so that they are inexpensive, robust, and versatile carriers for a variety of instrument packages. Applications are immediate and many, in areas as diverse as prosthetics, medicine, space, construction, nanoscience, defense, remote sensing, environmental cleanup, and biotechnology.

Tilden, M.; Hasslacher, B.; Mainieri, R.; Moses, J.

1996-10-01

319

A fully autonomous microrobotic endoscopy system  

Microsoft Academic Search

In this paper, design of an autonomous microrobotic endoscopy system is presented. The proposed microrobotic endoscope is a vision-guided device, developed to facilitate navigation inside a human colon. The design of the entire system is divided into three areas viz. design of a microrobotic carrier, path planning and guidance, and an off-board control system. A microrobotic design based on pneumatic

Vijayan K. Asari; Sanjiv Kumar; Irwan M. Kassim

2000-01-01

320

Pedestrian injury mitigation by autonomous braking  

Microsoft Academic Search

The objective of this study was to calculate the potential effectiveness of a pedestrian injury mitigation system that autonomously brakes the car prior to impact. The effectiveness was measured by the reduction of fatally and severely injured pedestrians. The database from the German In-Depth Accident Study (GIDAS) was queried for pedestrians hit by the front of cars from 1999 to

Erik Rosén; Jan-Erik Källhammer; Dick Eriksson; Matthias Nentwich; Rikard Fredriksson; Kip Smith

2010-01-01

321

An autonomous race car design competition  

Microsoft Academic Search

This paper describes an innovative collaboration between industry and academia in creating a meaningful design experience for undergraduate electrical engineering students. The design project involves designing, building and testing an autonomous model race car. The course culminates in a competition. The competition included students from UC Davis, San Jose State University, and UC Berkeley and is sponsored by National Semiconductor.

T. W. Matthews; R. R. Spencer

1997-01-01

322

Autonomous all-wheel car steering  

Microsoft Academic Search

The autonomous car steering problem is defined as a regulation task of yaw and relative lateral position dynamics along a given path trajectory. Therefore a control structure based on vehicle dynamics inversion is proposed to decouple the two regulation tasks. The inversion structure assumes all-wheel (joint front- and rear-axle) steering actuation. The resulting algorithm exhibits additionally integrated robust yaw stabilization

Naim Bajcinca

2006-01-01

323

Autonomous Automobiles: Developing Cars That Drive Themselves  

Microsoft Academic Search

Every year, hundreds of thousands of people are killed in road accidents, with millions more injured. The vast majority of these accidents are due to human error, with less than 10% caused by vehicle defects. Such staggering findings motivate the use of driver assistant systems and fully autonomous vehicles to increase driver and passenger safety. This talk will explore developments

Dave Ferguson

2007-01-01

324

An autonomous race car design competition  

Microsoft Academic Search

This paper describes an innovative collaboration between industry and academia in creating a meaningful design experience for undergraduate electrical engineering students. The design project involves designing, building and testing an autonomous model racecar. The course culminates in a competition. A primary goal of the competition is to provide undergraduates with a meaningful design experience with an emphasis on electronic circuits.

T. W. Matthews; R. R. Spencer

2001-01-01

325

Autonomous automobiles: developing cars that drive themselves  

Microsoft Academic Search

Every year, hundreds of thousands of people are killed in road accidents, with millions more injured. The vast majority of these accidents are due to human error, with less than 10% caused by vehicle defects [1]. Such staggering findings motivate the use of driver assistant systems and fully autonomous vehicles to increase driver and passenger safety. This talk will explore

Dave Ferguson

2007-01-01

326

Developing autonomous maneuvering capabilities for future cars  

Microsoft Academic Search

Developing intelligent transportation systems which take into consideration the socio-economical, environmental, and safety factors of the modern society, is one of the grand challenges of the next century. Progress in the fields of mobile robots, control architectures, and computer vision allows us to now envisage the integration of autonomous and driving-assistance capabilities within future vehicles. The paper presents the concept

C. Laugier; I. Paromtchik; M. Parent

1999-01-01

327

Self-organizing autonomic computing systems  

Microsoft Academic Search

Recently a great deal of research has been under- taken in the area of automating the enterprise IT Infrastructure. For enterprises with a large number of computers the IT Infrastructure operation represents a considerable amount of the enterprise budget. Autonomic Computing Systems are systems which were created for minimizing this budget component. They were meant to correct and optimize the

Bogdan Solomon; Dan Ionescu; Marin Litoiu; Gabriel Iszlai

2011-01-01

328

Adaptive region control for autonomous underwater vehicles  

Microsoft Academic Search

In this paper, we propose a new control concept called adaptive region control, for autonomous underwater vehicle (AUV). In this new control concept, the desired objective can be specified as a region instead of a point. The proposed control law does not require any knowledge of the inertia matrix, Coriolis and centripetal force, hydrodynamic damping, and parameters of the gravity

C. C. Cheah; Y. C. Sun

2004-01-01

329

Diabetic cardiovascular autonomic neuropathy: clinical implications.  

PubMed

Diabetic cardiovascular autonomic neuropathy (DCAN), the impairment of the autonomic balance of the cardiovascular system in the setting of diabetes mellitus (DM), is frequently observed in both Type 1 and 2 DM, has detrimental effects on the quality of life and portends increased mortality. Clinical manifestations include: resting heart rate disorders, exercise intolerance, intraoperative cardiovascular lability, orthostatic alterations in heart rate and blood pressure, QT-interval prolongation, abnormal diurnal and nocturnal blood pressure variation, silent myocardial ischemia and diabetic cardiomyopathy. Clinical tests for autonomic nervous system evaluation, heart rate variability analysis, autonomic innervation imaging techniques, microneurography and baroreflex analysis are the main diagnostic tools for DCAN detection. Aldose reductase inhibitors and antioxidants may be helpful in DCAN therapy, but a regular, more generalized and multifactorial approach should be adopted with inclusion of lifestyle modifications, strict glycemic control and treatment of concomitant traditional cardiovascular risk factors, in order to achieve the best therapeutic results. In the present review, the authors provide aspects of DCAN pathophysiology, clinical presentation, diagnosis and an algorithm regarding the evaluation and management of DCAN in DM patients. PMID:22894631

Karayannis, Georgios; Giamouzis, Gregory; Cokkinos, Dennis V; Skoularigis, John; Triposkiadis, Filippos

2012-06-01

330

DYNAMIC MODELLING OF SMALL AUTONOMOUS BLIMPS  

Microsoft Academic Search

We are interested in blimps. A blimp is a small airship that has no metal framework and collapses when deflated. In this paper, dynamic modeling of autonomous blimps is presented, using the Newton-Euler approach. This study discusses the motion in 6 degrees of freedom since 6 independent coordinates are necessary to determine the position and orientation of this vehicle.

Yasmina BESTAOUI; Tarek HAMEL

331

Tardigrada of Xinjiang Uygur Autonomous Region, China  

Microsoft Academic Search

Relatively little is known of the Tardigrada fauna of China, and there are no previous tardigrade records for Xinjiang Uygur Autonomous Region, China's largest administrative division. Moss specimens of the Missouri Botanical Garden Herbarium (St. Louis, U.S.A.) were used as a source of tardigrades from this region. Of the 270 moss specimens sampled, 78 yielded tardigrades. Species found were Bryodelphax

Clark W. BEASLEY; William R. MILLER

332

Control algorithms for autonomous robot navigation  

SciTech Connect

This paper examines control algorithm requirements for autonomous robot navigation outside laboratory environments. Three aspects of navigation are considered: navigation control in explored terrain, environment interactions with robot sensors, and navigation control in unanticipated situations. Major navigation methods are presented and relevance of traditional human learning theory is discussed. A new navigation technique linking graph theory and incidental learning is introduced.

Jorgensen, C.C.

1985-09-20

333

Expressive autonomous cinematography for interactive virtual environments  

Microsoft Academic Search

We have created an automatic cinematography system for interactive virtual environments. This system controls a virtual camera and lights in a three-dimensional virtual world inhabited by a group of autonomous and user-controlled characters. By dynamically changing the camera and the lights, our system facilitates the interaction of human participants with this world and displays the emotional content of the digital

Bill Tomlinson; Bruce Blumberg; Delphine Nain

2000-01-01

334

Usable autonomic computing systems: the administrator's perspective  

Microsoft Academic Search

One of the primary motivations behind autonomic computing (AC) is the problem of administrating highly complex systems. AC seeks to solve this problem through increased automation, relieving system administrators of many burdensome activities. However, the AC strategy of managing complexity through automation runs the risk of making management harder. We performed field studies of current administrator work practices to inform

Rob Barrett; Paul P. Maglio; Eser Kandogan; John Bailey

2004-01-01

335

Love alters autonomic reactivity to emotions.  

PubMed

Periods of bond formation are accompanied by physiological and emotional changes, yet, little is known about the effects of falling in love on the individual's physiological response to emotions. We examined autonomic reactivity to the presentation of negative and positive films in 112 young adults, including 57 singles and 55 new lovers who began a romantic relationship 2.5 months prior to the experiment Autonomic reactivity was measured by Respiratory Sinus Arrhythmia (RSA) to two baseline emotionally neutral films, two negative films, and two positive films. Results demonstrated that RSA in singles decreased during the presentation of negative emotions, indicating physiological stress response. However, no such decrease was found among new lovers, pointing to more optimal vagal regulation during the period of falling in love. Autonomic reactivity, indexed by RSA decrease from the positive to the negative films, was greater among singles as compared to lovers, suggesting that love buffers against autonomic stress and facilitates emotion regulation. Findings suggest that vagal regulation may be one mechanism through which love and attachment reduce stress and promote well-being and health. PMID:22142209

Schneiderman, Inna; Zilberstein-Kra, Yael; Leckman, James F; Feldman, Ruth

2011-12-01

336

OCTOPUS: AN AUTONOMOUS WHEELED CLIMBING ROBOT  

Microsoft Academic Search

This paper presents an innovative off-road wheeled mobile robot, named Octopus, able to deal autonomously with obstacles in rough terrain without getting stuck. To achieve such a performance, the robot is equipped with tilt sensors and tactile wheels. The sophisticated locomotion mechanism of Octopus has 8 motorized wheels and a total of 15 degrees of freedom (14 of them are

M. Lauria; Y. Piguet; R. Siegwart

2002-01-01

337

Global Positioning System (GPS) autonomous navigation  

Microsoft Academic Search

A system description, a discussion of design issues, and performance results obtained from the Aerospace Corporation simulation of the GPS autonomous navigation system (ANS) concept are given. Analysis methods, physical models, and pertinent equations are presented. Measurement data are realistically simulated and include the effects of all known environmental and hardware phenomena affecting performance. Performance under nominal and anomalous conditions

M. P. Ananda; H. Bernstein; K. E. Cunningham; W. A. Feess; E. G. Stroud

1990-01-01

338

Synthesis of autonomous robots through evolution  

Microsoft Academic Search

Evolutionary robotics is the attempt to develop robots through a self-organized process based on artificial evolution. This approach stresses the importance of the study of systems that have a body and that are situated in a physical environment, and which autonomously develop their own skills in close interaction with the environment. In this review we briefly illustrate the method and

Stefano Nolfi; Dario Floreano

2002-01-01

339

Schedule execution in autonomic manufacturing execution systems  

Microsoft Academic Search

This paper discusses a manufacturing execution system (MES) that prefers and attempts to follow a given schedule. The MES performs this task in an autonomic manner, filling in missing details, providing alternatives for unfeasible assignments, handling auxiliary tasks, and so on. The paper presents the research challenge, depicts the MES design, and gives experimental results. The research contribution resides in

Paul Valckenaers; Hendrik Van Brussel; Paul Verstraete; Bart Saint Germain; Hadeli

2007-01-01

340

An autonomous ice-cream serving robot  

Microsoft Academic Search

An autonomous ice cream serving robot is pre- sented in this video. The video was filmed during the Automatica 2010 trade fair in Munich. Within four days, approximately 250 scoops of different kinds of ice cream have been served to visitors during the fair. Using the KUKA light-weighted robotic arms and the DLR\\/HIT robotic hands, two scientific aspects are shown

Zhixing Xue; Steffen Ruehl; Andreas Hermann; Thilo Kerscher; Ruediger Dillmann

2011-01-01

341

On the Development of Autonomous Powered Parachute  

Microsoft Academic Search

The powered parachute (PPC)is now the most popular ultra-light flight equipments. The PPC has excellent self stability and is very simple to fly. To extend the PPC's application to some special area, for example, in long time cruise, precision airdrop, and dangerous mission, autonomous flight is required. This paper aims to fulfill such a design. The flight principle of the

Bian Yongqing; Jiang Tao; He Wei

2007-01-01

342

Autonomicity in Oracle Database Management System  

Microsoft Academic Search

Human world is becoming more and more dependent on computers and information technology (IT). The autonomic capabilities in computers and IT have become the need of the day. These capabilities in software and systems increase performance, accuracy, availability and reliability with less or no human intervention (HI). Database has become the integral part of information system in most of the

Basit Raza; Abdul Mateen; Muhammad Sher; Mian Muhammad Awais; Tauqeer Hussain

2010-01-01

343

Autonomicity in Universal Database DB2  

Microsoft Academic Search

Functionality, complexity, heterogeneity and dynamism in computing environment are increasing day by day. This enhanced utility of computers has a profound impact on the systempsilas brittleness, manageability and security. Self-management is important in systems, networks, communication as well as in Database Management Systems (DBMSs). Autonomic computing reduces the problems and increases accuracy and efficiency of the DBMSs. Recent years have

Abdul Mateen; Basit Raza; Tauqeer Hussain; Mian M. Awais

2009-01-01

344

Autonomous vehicle navigation using evolutionary reinforcement learning  

Microsoft Academic Search

Reinforcement learning schemes perform direct on-line search in control space. This makes them appropriate for modifying control rules to obtain improvements in the performance of a system. The effectiveness of a reinforcement learning strategy is studied here through the training of a learning classifier system (LCS) that controls the movement of an autonomous vehicle in simulated paths including left and

A. Stafylopatis; K. Blekas

1998-01-01

345

Operating management of intelligent & autonomous MIMO vehicles  

Microsoft Academic Search

In this work, a dynamic graphical model of operating modes of intelligent and autonomous multi inputs multi outputs (MIMO) vehicles is presented. This study shows the feasibility of improving the traffic management and decision inside confined space according to the operating situation of each involved vehicle. The proposed dynamic graphical model depends on the on-line monitoring outputs of the vehicles'

Wissam KHALIL; Rochdi MERZOUKI; Belkacem OULD-BOUAMAMA

2010-01-01

346

Black knight: An autonomous vehicle for competition  

Microsoft Academic Search

Black Knight, the University of Central Florida's vehicle in the 11th Intelligent Ground Vehicle Competition (IGVC) competed in 2003. Completing in 5th place in the naviga- tional challenge and 10th in the autonomous challenge in its first competition has proven our vehicle to be a strong competitor in this competition. The vehicle has many interesting features that allow it to

Fernando G. Gonzalez; Richard Andres; David Deal; Frank Goergen; Matt Rhodes; Tim Roberts; Gary Stein; Josh Wilson; Sarah Wong

2004-01-01

347

Coordination and control of multiple autonomous vehicles  

Microsoft Academic Search

The DARPA SIMNET project allows hundreds of soldiers to train together in a virtual air, land, and sea environment through a network of interactive simulators. In addition to the manned simulators, the virtual environment is also populated by a large number of autonomous vehicles called semi-automated forces, which are controlled by an operator at a single workstation. The authors address

David L. Brock; David J. Montana; Andrew Z. Ceranowicz

1992-01-01

348

Autonomous collision avoidance: the technical requirements  

Microsoft Academic Search

Autonomous collision avoidance is necessary if Unmanned Aerial Vehicles (UAVs) are to “blacken the sky” in massed attacks, accompany manned fighters on combat missions, and transition civil airspace. These vehicles will, in some manner, have to “see and avoid” other aircraft. An automated air collision avoidance system will fulfill a part of this need. It will automatically maneuver an aircraft,

F. Barfield

2000-01-01

349

Evolutionary autonomous agents: A neuroscience perspective  

Microsoft Academic Search

In this article, I discuss the use of neurally driven evolutionary autonomous agents (EAAs) in neuroscientific investigations. Two fundamental questions are addressed. Can EAA studies shed new light on the structure and function of biological nervous systems? And can these studies lead to the development of new tools for neuroscientific analysis? The value and significant potential of EAA modelling in

Eytan Ruppin

2002-01-01

350

Autonomic neuropathy: a marker of cardiovascular risk  

Microsoft Academic Search

C ardiac autonomic neuropathy (CAN) represents a serious complication as it carries an approximately five-fold risk of mortality in patients with diabetes just as in those with chronic liver diseases. The high mortality rate may be related to silent myocardial infarction, cardiac arrhythmias, cardiovascular and cardiorespiratory instability and to other causes not yet explained. Resting tachycardia due to parasympathetic damage

PETER KEMPLER

2010-01-01

351

Malicious Hubs: Detecting Abnormally Malicious Autonomous Systems  

Microsoft Academic Search

While many attacks are distributed across botnets, investigators and network operators have recently targeted malicious networks through high profile autonomous system (AS) de-peerings and network shut-downs. In this paper, we explore whether some ASes indeed are safe havens for malicious activity. We look for ISPs and ASes that exhibit disproportionately high malicious behavior using 12 popular blacklists. We find that

Andrew J. Kalafut; Craig A. Shue; Minaxi Gupta

2010-01-01

352

Artificial immune systems: application to autonomous agents  

Microsoft Academic Search

The function of the immune system is to protect the living body against invaders through the use of defensive mechanisms. Some previous researchers have used artificial immune systems (AIS) to solve diverse engineering problems. The purpose of the paper is to apply the AIS technique to a distributed autonomous robotics system (DARS) problem. One of the classic problems in DARS

Hossam Meshref; Hugh VanLandingham

2000-01-01

353

Autonomous Dialogue for Interactive Story Telling  

Microsoft Academic Search

We are investigating techniques for supporting autonomous dialogue in interactive story telling. That is, instead of writing a script for every possible sequence of events, we would like to develop an approach in which story characters have more autonomy in deciding what to say when. We describe our current research on applying dialogue games theory to interactive story telling. We

Nancy L. Green

2001-01-01

354

An architecture for reflexive autonomous vehicle control  

Microsoft Academic Search

We describe a software architecture to support the planning and control requirements of an autonomous land vehicle. This architecture is designed specifically to handle diverse terrain with maximal speed, efficacy and versatility through the use of a library of reflexive strategies specialized to particular needs. A hierarchy of control is built in which lower level modules perform tasks requiring greatest

David W. Payton

1986-01-01

355

Precision Autonomous Landing Adaptive Control Experiment (PALACE).  

National Technical Information Service (NTIS)

This paper describes the development, flight-testing and demonstration of technologies for the autonomous landing of a Yamaha RMAX helicopter at noncooperative sites without the aid of GPS. The Yamaha RMAX used for these flight trials has been modified in...

C. T. Theodore M. B. Tischler

2006-01-01

356

Dependence relations among autonomous agents (abstract)  

Microsoft Academic Search

The main thesis of this work is that human interactions are neither unpredictable nor bounded, but they are undertaken autonomously on the grounds of a number of basic principles and conditions. Among these, a crucial role is played by the objective dependence relationships holding among agents. In this paper we report about a first step in providing a computational theory

Cristiano Castlefranchi; Maria Miceli; Amedeo Cesta

1992-01-01

357

Autonomic Arousal in the Presence of Psychopathy  

Microsoft Academic Search

The authors analyzed 584 questionnaires from mental health and criminal justice professionals in 12 U.S. cities concerning their physical reaction while interviewing a psychopathic subject. Of the respondents who had interviewed a psychopathic subject, 77.3% reported a physical reaction. Their narratives describe a physiological change, most often dermatological and least often pulmonary, due to likely sympathetic activation of their autonomic

J. Reid Meloy; M. J. Meloy

2003-01-01

358

Autonomic Function in Manganese Alloy Workers  

Microsoft Academic Search

The observation of orthostatic hypotension in an index case of manganese toxicity lead to this prospective attempt to evaluate cardiovascular autonomic function and cognitive and emotional neurotoxicity in eight manganese alloy welders and machinists. The subjects consisted of a convenience sample consisting of an index case of manganese dementia, his four co-workers in a “frog shop” for gouging, welding, and

William W. Barrington; Carol R. Angle; Nancy K. Willcockson; Marjorie A. Padula; Thomas Korn

1998-01-01

359

The Baker Observatory Robotic Autonomous Telescope  

NASA Astrophysics Data System (ADS)

We describe the Baker Observatory Robotic Autonomous Telescope project. The hardware includes a 16 inch Meade LX-200 telescope, an AstroHaven 7 feet dome, an Apogee U47 CCD camera and filter wheel, a Boltwood Cloud Sensor II, and various other minor hardware. We are implementing RTS2 for the Telescope Control System and incorporating custom drivers for ancillary systems.

Hicks, L. L.; Reed, M. D.; Thompson, M. A.; Gilker, J. T.

360

RCUBE - a platform for intelligent autonomous systems  

Microsoft Academic Search

An intelligent robot platform for autonomous systems with vision capabilities has been developed by the University of Applied Sciences Brandenburg in cooperation with SME's. The system is suitable as a research and education platform for universities, a basis for industrial applications and for private developers of robots. This paper presents an architecture overview and application details of the RCUBE system.

Ingo Boersch; Jochen Heinsohn; Harald Loose; Kai-Uwe Mrkor

2003-01-01

361

Advanced sonar technologies for autonomous mine countermeasures  

Microsoft Academic Search

The U.S. Office of Naval Research is developing synthetic aperture sonars for the detection, localization, and classification of mines, for protection of sea lines of communication and Naval operating areas, and for support of amphibious operations. This paper reviews several evolving mine countermeasures sonars deployed on autonomous undersea vehicles that operate stand-alone and in coordination with complementary sensors, including the

Daniel D. Sternlicht; Jose E. Fernandez; Richard Holtzapple; Daniel P. Kucik; Thomas C. Montgomery; Charles M. Loeffler

2011-01-01

362

Multifunctional Coating for Autonomous Corrosion Control.  

National Technical Information Service (NTIS)

This slide presentation reviews the effects of corrosion on various structures at the Kennedy Space Center, and the work to discover a corrosion control coating that will be autonomous and will indicate corrosion at an early point in the process. Kennedy ...

J. W. Buhrow L. M. Calle P. E. Hintze S. T. Jolley W. Li

2011-01-01

363

Radar sensor for an autonomous Antarctic explorer  

Microsoft Academic Search

The localization and identification of antarctic meteorites is a task of great scientific interest and with implications to planetary exploration. Autonomous search for antarctic meteorites presents a profound technical challenge. Ground Penetrating Radar (GPR) holds the prospect to safeguard antarctic robot from terrain dangers and detect subsurface objects. In January 1998, we validated a 500 MHz GPR sensor as part

Alex Foessel; Dimi Apostolopoulos; William L. Whittaker

1999-01-01

364

An Arctic Remote Autonomous Measurement Platform  

Microsoft Academic Search

Perpetual ice cover in the Arctic inhibits broad analysis of the region. Ice camps and research ships do not provide sufficient temporal and spatial coverage. Satellites expand the coverage, but only within the limits of on-board sensors. A multidisciplinary data collection tool is needed to expand coverage in ice covered regions. The Arctic Remote Autonomous Measurement Platform (ARAMP) is a

K. Prada; D. Koelsch; W. Witzell; R. Singer

1987-01-01

365

The Design of an Autonomous Sumo Robot  

Microsoft Academic Search

This report will present a quick overview of the design, implementation, and results of an Autonomous Sumo Robot (TITAN) developed with an intent to compete in a sumo competition competition. Using artificial intelligence to perform several tasks, such as boundary detection, long and short range object detection, and driving in an enclosed ring, the robot ultimately executes combat tactics to

S. Chow; M. Hui; S. Merryfield; N. Schwinghamer

366

Autonomic Correlates of Meditation and Hypnosis  

Microsoft Academic Search

Peripheral autonomic responses during meditation and autohypnosis are compared with controls. HR, Resp, and GSR were assessed during a meditation\\/hypnosis period and compared to both pre- and post-baseline conditions for three groups of 10 Ss each: Transcendental Meditators, Ss trained in autohypnosis, and control Ss. All Ss were selected for high susceptibility to hypnosis. There were no significant differences between

Larry C. Walrath; David W. Hamilton

1975-01-01

367

Autonomic dysfunction in a Jack Russell terrier.  

PubMed

A 4-year-old Jack Russell terrier was presented with an array of clinical signs suggestive of autonomic dysfunction. Many of the clinical signs were consistent with a diagnosis of dysautonomia; however, both chronicity and resolution of signs contradicted a diagnosis of this disease. PMID:21629424

Caines, Deanne; Pinard, Chantale L; Kruth, Stephen; Orr, Jeremy; James, Fiona

2011-03-01

368

Autonomic dysfunction in a Jack Russell terrier  

PubMed Central

A 4-year-old Jack Russell terrier was presented with an array of clinical signs suggestive of autonomic dysfunction. Many of the clinical signs were consistent with a diagnosis of dysautonomia; however, both chronicity and resolution of signs contradicted a diagnosis of this disease.

Caines, Deanne; Pinard, Chantale L.; Kruth, Stephen; Orr, Jeremy; James, Fiona

2011-01-01

369

Autonomous millimeter-wave radar guidance systems  

Microsoft Academic Search

Hercules Defense Electronics Systems, Incorporated has applied millimeter wave technologies to a variety of guidance and control problems. This presentation documents the development and integration of an autonomous millimeter wave seeker to the AGM-65(D) (Maverick) air- to-ground missile. The resulting system was successfully demonstrated to search a large area for potential targets, prioritize detections, and guide the missile to the

Kevin S. Schweiker

1992-01-01

370

Vision-based method for autonomous landing  

Microsoft Academic Search

This paper presents eight visual cues to be used as part of a control loop for autonomous landing. The idea is based on fixating the camera at the vanishing point of the projection of the runway in the image. Two-dimensional geometrical cues are used to derive the visual cues. The visual cues that are extracted are the relative location of

Huseyin H. Yakali; Daniel Raviv

1992-01-01

371

Modular hardware infrastructure for autonomous underwater vehicles  

Microsoft Academic Search

Autonomous underwater vehicles (AUVs) are taking on increasingly visible and valuable roles in oceanographic research institutions, the offshore industry, and the military (Podder et al., 2004 and Yongkuan, 2002). AUV research, especially at the university level, is hindered by the lack of flexible and affordable platforms suitable for a wide range of applications. This paper presents an electrical and mechanical

Ian Wang; Bradley Factor; Sam Fladung; Ryan Stenson

2005-01-01

372

Vehicle diagnosis - an application for autonomous driving  

Microsoft Academic Search

The objective of the cooperate research project “Autonomous Driving” is the automation of an ordinary mass-produced car in such a way that it can be moved without a human driver. A possible application of such a system is the automated durability test of a vehicle, which nowadays is usually done by a human test driver under extreme stress on man

Thorsten Michler; T. Ehlers; J.-U. Varchmin

2000-01-01

373

Design of an Autonomous Jumping Microrobot  

Microsoft Academic Search

This paper presents the design and initial results for an autonomous jumping microrobot. At the millimeter size scale, jumping can offer numerous advantages for efficient locomotion, including dealing with obstacles and potentially even latching onto other larger mobile hosts. Robot design is divided into four primary areas: energy storage, actuation, power, and control. Like its biological inspiration, the flea, a

Sarah Bergbreiter; Kristofer S. J. Pister

2007-01-01

374

Autonomous Inverted Helicopter Flight via Reinforcement Learning  

Microsoft Academic Search

Helicopters have highly stochastic, nonlinear, dynamics, and autonomous helicopter flight is widely regarded to be a challenging control problem. As heli- copters are highly unstable at low speeds, it is particularly difficult to design con- trollers for low speed aerobatic maneuvers. In this paper, we describe a successful application of reinforcement learning to designing a controller for sustained in- verted

Andrew Y. Ng; Adam Coates; Mark Diel; Varun Ganapathi; Jamie Schulte; Ben Tse; Eric Berger; Eric Liang

2004-01-01

375

TECHNOLOGY NEEDS FOR AUTONOMOUS UNDERWATER VEHICLES  

Microsoft Academic Search

This paper considers the technology needs for autonomous underwater vehicles as the middle layer of a three-layer process. The first layer is the high level User Requirement, which may be stated in the form of business objectives such as 'competitive running cost' or 'less than 1 hour per week downtime'. These business objectives map on to the middle layer of

Gwyn Griffiths

376

Autonomous Virtual Actors Based on Virtual Sensors  

Microsoft Academic Search

In this paper, we present current research developments in the Virtual Life of autonomous synthetic actors. After a brief description of the perception action principles with a few simple examples, we emphasize the concept of virtual sensors for virtual humans. In particular, we describe in details our experiences in implementing virtual vision, tactile and audition. We then describe perception-based locomotion,

Daniel Thalmann; Hansrudi Noser; Zhiyong Huang

1997-01-01

377

An intelligent robot vision for autonomous navigation  

Microsoft Academic Search

The vision system for an autonomous robotic vehicle is described in detail. The vision system utilizes fuzzy logic and artificial neural network technologies. This go-cart sized vehicle guided itself through an obstacle course in an international competition held at Disney World mid-July of 1996. A brief history of the competition an overview of the vehicle itself and the vision system's

K. Ashenayi

1997-01-01

378

Post processing wrapper generated tables for labeling anonymous datasets  

Microsoft Academic Search

A large number of wrappers generate tables without column names for human consumption because the meaning of the columns are apparent from the context and easy for humans to understand, but in emerging applications, labels are needed for autonomous assignment and schema mapping where machine try to understand the tables. Autonomous label assignment is critical in volume data processing where

Emdad Ahmed; Hasan M. Jamil

2009-01-01

379

Mapping planetary caves with an autonomous, heterogeneous robot team  

NASA Astrophysics Data System (ADS)

Caves on other planetary bodies offer sheltered habitat for future human explorers and numerous clues to a planet's past for scientists. While recent orbital imagery provides exciting new details about cave entrances on the Moon and Mars, the interiors of these caves are still unknown and not observable from orbit. Multi-robot teams offer unique solutions for exploration and modeling subsurface voids during precursor missions. Robot teams that are diverse in terms of size, mobility, sensing, and capability can provide great advantages, but this diversity, coupled with inherently distinct low-level behavior architectures, makes coordination a challenge. This paper presents a framework that consists of an autonomous frontier and capability-based task generator, a distributed market-based strategy for coordinating and allocating tasks to the different team members, and a communication paradigm for seamless interaction between the different robots in the system. Robots have different sensors, (in the representative robot team used for testing: 2D mapping sensors, 3D modeling sensors, or no exteroceptive sensors), and varying levels of mobility. Tasks are generated to explore, model, and take science samples. Based on an individual robot's capability and associated cost for executing a generated task, a robot is autonomously selected for task execution. The robots create coarse online maps and store collected data for high resolution offline modeling. The coordination approach has been field tested at a mock cave site with highly-unstructured natural terrain, as well as an outdoor patio area. Initial results are promising for applicability of the proposed multi-robot framework to exploration and modeling of planetary caves.

Husain, Ammar; Jones, Heather; Kannan, Balajee; Wong, Uland; Pimentel, Tiago; Tang, Sarah; Daftry, Shreyansh; Huber, Steven; Whittaker, William L.

380

Autonomic seizures and autonomic status epilepticus peculiar to childhood: diagnosis and management  

Microsoft Academic Search

Autonomic seizures and autonomic status epilepticus in children have a high prevalence, manifest with dramatic clinical symptoms, and have important clinical and management implications. They probably affect ?13% of children aged 3–6 years with one or more nonfebrile seizures, or 6% in the age group 1–15. The primary cause is an idiopathic age-dependent epileptogenic susceptibility (Panayiotopoulos syndrome), but 10–20% are

Chrysostomos P. Panayiotopoulos

2004-01-01

381

Autonomic Nervous System Function in Infants and Adolescents: Impact of Autonomic Tests on Heart Rate Variability  

Microsoft Academic Search

Measurement of heart rate variability (HRV) shows information on the functional state of the autonomic nervous system (ANS).\\u000a In adults there are standardized autonomic tests and well-established ranges of normal values, which is not the case in children.\\u000a The aim of the present study was (1) to introduce an ANS test battery, especially for children and adolescents; (2) to establish

Elke Longin; Carmen Dimitriadis; Samina Shazi; Thorsten Gerstner; Tamara Lenz; Stephan König

2009-01-01

382

Exercise and the autonomic nervous system.  

PubMed

The autonomic nervous system plays a crucial role in the cardiovascular response to acute (dynamic) exercise in animals and humans. During exercise, oxygen uptake is a function of the triple-product of heart rate and stroke volume (i.e., cardiac output) and arterial-mixed venous oxygen difference (the Fick principle). The degree to which each of the variables can increase determines maximal oxygen uptake (V?O2max). Both "central command" and "the exercise pressor reflex" are important in determining the cardiovascular response and the resetting of the arterial baroreflex during exercise to precisely match systemic oxygen delivery with metabolic demand. In general, patients with autonomic disorders have low levels of V?O2max, indicating reduced physical fitness and exercise capacity. Moreover, the vast majority of the patients have blunted or abnormal cardiovascular response to exercise, especially during maximal exercise. There is now convincing evidence that some of the protective and therapeutic effects of chronic exercise training are related to the impact on the autonomic nervous system. Additionally, training induced improvement in vascular function, blood volume expansion, cardiac remodeling, insulin resistance and renal-adrenal function may also contribute to the protection and treatment of cardiovascular, metabolic and autonomic disorders. Exercise training also improves mental health, helps to prevent depression, and promotes or maintains positive self-esteem. Moderate-intensity exercise at least 30 minutes per day and at least 5 days per week is recommended for the vast majority of people. Supervised exercise training is preferable to maximize function capacity, and may be particularly important for patients with autonomic disorders. PMID:24095123

Fu, Qi; Levine, Benjamin D

2013-01-01

383

Understanding the efficiency of autonomous nano- and microscale motors.  

PubMed

We analyze the power conversion efficiency of different classes of autonomous nano- and micromotors. For bimetallic catalytic motors that operate by a self-electrophoretic mechanism, there are four stages of energy loss, and together they result in a power conversion efficiency on the order of 10(-9). The results of finite element modeling agree well with experimental measurements of the efficiency of catalytic Pt-Au nanorod motors. Modifications of the composition and shape of bimetallic catalytic motors were predicted computationally and found experimentally to lead to higher efficiency. The efficiencies of bubble-propelled catalytic micromotors, magnetically driven flagellar motors, Janus micromotors driven by self-generated thermal gradients, and ultrasonically driven metallic micromotors are also analyzed and discussed. PMID:23795959

Wang, Wei; Chiang, Tso-Yi; Velegol, Darrell; Mallouk, Thomas E

2013-07-05

384

Investigating robot safety and robustness in an autonomous systems laboratory  

NASA Astrophysics Data System (ADS)

The development of systems methods is intended to permit the integration of robot sensing and planning for semiautonomous and autonomous robotic operations. The approach involves the development of situated reasoning software to integrate planning and plan monitoring in real time. The planning system therefore selectively employs available sensors that the robot can use to track changes in the environment. An integrated system is described that incorporates 2D vision, task-level programming, and goal-directed reasoning in performing the repair and replacement of electrical components. A vision algorithm is mentioned that permits the detection of visual characteristics on some spacecraft components, and some code generators can provide code for moving and turning motions. The developments are of significant interest to the continued growth of useful robotics technologies.

Bonasso, R. P.; Hwang, V. S.; Sanborn, J. C.; Stoney, W. E.

385

Dynamic map building for an autonomous mobile robot  

SciTech Connect

This article presents an algorithm for autonomous map building and maintenance for a mobile robot. The authors believe that mobile robot navigation can be treated as a problem of tracking geometric features that occur naturally in the environment. They represent each feature in the map by a location estimate (the feature state vector) and two distinct measures of uncertainty: a covariance matrix to represent uncertainty in feature location, and a credibility measure to represent their belief in the validity of the feature. During each position update cycle, predicted measurements are generated for each geometric feature in the map and compared with actual sensor observations. Successful matches cause a feature's credibility to be increased. Unpredicted observations are used to initialize new geometric features, while unobserved predictions result in a geometric feature's credibility being decreased. They also describe experimental results obtained with the algorithm that demonstrate successful map building using real sonar data.

Leonard, J.J.; Durrant-Whyte, H.F. (Univ. of Oxford, (United Kingdom)); Cox, I.J. (NEC Research Inst., Princeton, NJ (United States))

1992-08-01

386

The role of anticipation in adaptive embodied autonomous systems  

NASA Astrophysics Data System (ADS)

The aim of this paper is to study the role that anticipation plays in adaptive autonomous systems. The emphasis will be on epistemological consequences of adaptation in practical robotic systems as they are currently developed in the new field of embodied artificial intelligence. The autonomy of physical robots is peculiar, because it consists in behavioral autonomy as well as epistemic autonomy. While the former is a problem that is often addressed, the latter poses difficult foundational questions for the field. We study the role that anticipation plays in this context. It is argued that embodied systems are a particularly interesting case for the study of epistemic autonomy. This is due to the fact that the adaptation process in robots generates a special form of representation that indicates the outcome of interaction and thus can support action selection schemes. The role of these representations and their epistemic and ontological consequences for the system as well as epistemological consequences for system observers are investigated.

Prem, Erich

1998-07-01

387

Autonomic failures in Perry syndrome with DCTN1 mutation.  

PubMed

Perry syndrome is a familial parkinsonism associated with central hypoventilation, mental depression, and weight loss. Previously, this very rare syndrome has been reported in only 7 families worldwide including in one Japanese family. We recently identified an additional family with Perry syndrome with DCTN1 mutation residing in Japan. The pedigree contains 19 family members spanning three generations, with four affected individuals. Affected members with early stage disease in this family presented with marked autonomic dysfunction including orthostatic hypotension and decreased cardiac uptake with [123]I-metaiodobenzylguanidine scintigram features that have not been described in previous cases. Because of central hypoventilation, all affected members need ventilation assistance, which is thought beneficial for prolongation of survival time as well as improving quality of life in this syndrome. PMID:20702129

Ohshima, Sachiko; Tsuboi, Yoshio; Yamamoto, Akifumi; Kawakami, Masato; Farrer, Matthew J; Kira, Jun-ichi; Shii, Hirofumi

2010-08-11

388

Autonomous urban reconnaissance ingress system (AURIS): providing a tactically relevant autonomous door-opening kit for unmanned ground vehicles  

NASA Astrophysics Data System (ADS)

The Autonomous Urban Reconnaissance Ingress System (AURIS™) addresses a significant limitation of current military and first responder robotics technology: the inability of reconnaissance robots to open doors. Leveraging user testing as a baseline, the program has derived specifications necessary for military personnel to open doors with fielded UGVs (Unmanned Ground Vehicles), and evaluates the technology's impact on operational mission areas: duration, timing, and user patience in developing a tactically relevant, safe, and effective system. Funding is provided through the US ARMY Tank Automotive Research, Development and Engineering Center (TARDEC) and the project represents a leap forward in perception, autonomy, robotic implements, and coordinated payload operation in UGVs. This paper describes high level details of specification generation, status of the last phase of development, an advanced view of the system autonomy capability, and a short look ahead towards the ongoing work on this compelling and important technology.

Shane, David J.; Rufo, Michael A.; Berkemeier, Matthew D.; Alberts, Joel A.

2012-05-01

389

Autonomous reinforcement learning with experience replay.  

PubMed

This paper considers the issues of efficiency and autonomy that are required to make reinforcement learning suitable for real-life control tasks. A real-time reinforcement learning algorithm is presented that repeatedly adjusts the control policy with the use of previously collected samples, and autonomously estimates the appropriate step-sizes for the learning updates. The algorithm is based on the actor-critic with experience replay whose step-sizes are determined on-line by an enhanced fixed point algorithm for on-line neural network training. An experimental study with simulated octopus arm and half-cheetah demonstrates the feasibility of the proposed algorithm to solve difficult learning control problems in an autonomous way within reasonably short time. PMID:23237972

Wawrzy?ski, Pawe?; Tanwani, Ajay Kumar

2012-11-29

390

The autonomic nervous system and renal physiology  

PubMed Central

Research in resistant hypertension has again focused on autonomic nervous system denervation – 50 years after it had been stopped due to postural hypotension and availability of newer drugs. These (ganglionic blockers) drugs have all been similarly stopped, due to postural hypotension and yet newer antihypertensive agents. Recent demonstration of the feasibility of limited regional transcatheter sympathetic denervation has excited clinicians due to potential therapeutic implications. Standard use of ambulatory blood pressure recording equipment may alter our understanding of the diagnosis, potential treatment strategies, and health care outcomes – when faced with patients whose office blood pressure remains in the hypertensive range – while under treatment with three antihypertensive drugs at the highest tolerable doses, plus a diuretic. We review herein clinical relationships between autonomic function, resistant hypertension, current treatment strategies, and reflect upon the possibility of changes in our approach to resistant hypertension.

D'Elia, John A; Weinrauch, Larry A

2013-01-01

391

Isolated sympathetic failure with autoimmune autonomic ganglionopathy.  

PubMed

A 16-year-old boy had a gradual onset of post-exercise myalgia with progressive fatigue and dizziness. He had bradycardia (37 beats/minute) with low supine and normal standing norepinephrine levels (56 and 311 pg/mL, respectively). He had absent sympathetically mediated vasoconstrictor responses during Valsalva maneuver testing. Circulating ganglionic acetylcholine receptor antibodies were identified. Response was gradual to treatment with intravenous immunoglobulin combined with aggressive symptomatic interventions (permanent pacemaker implantation and treatment with pyridostigmine, midodrine, and modafinil). After the intravenous immunoglobulin treatment, his autoantibody levels decreased and the autonomic abnormalities resolved. After a reconditioning exercise program and eventually undetectable antibody titers, he achieved complete recovery. The patient continued to do well after his pacemaker was removed and his medications were discontinued. Thus, severe isolated sympathetic nervous system failure can occur in adolescents with autoimmune autonomic ganglionopathy, and multifaceted treatment can be effective. PMID:20837310

Fischer, Philip R; Sandroni, Paola; Pittock, Sean J; Porter, Co-burn J; Lehwald, Lenora M; Raj, Satish R

2010-10-01

392

Demonstration of autonomous air monitoring through robotics  

SciTech Connect

The project included modifying an existing teleoperated robot to include autonomous navigation, large object avoidance, and air monitoring and demonstrating that prototype robot system in indoor and outdoor environments. The robot was also modified to carry a HNU PI-101 Photoionization Detector air monitoring device. A sonar range finder, which already was an integral part of the Surveyor, was repositioned to the front of the robot chassis to detect large obstacles in the path of the robot. In addition, the software of the onboard computer was also extensively modified to provide: navigation control, dynamic steering to smoothly follow the wire-course without hesitation, obstacle avoidance, autonomous shut down and remote reporting of toxic substance detection.

Rancatore, R.

1989-11-01

393

Interictal autonomic abnormalities in idiopathic Rolandic epilepsy.  

PubMed

We investigated 50 young patients with a diagnosis of Rolandic Epilepsy (RE) for the presence of abnormalities in autonomic tone compared with 50 young patients with idiopathic generalized epilepsy with absences and 50 typically developing children of comparable age. We analyzed time domain (N-N interval, pNN50) and frequency domain (High Frequency (HF), Low Frequency (LF) and LF/HF ratio) indices from ten-minute resting EKG activity. Patients with RE showed significantly higher HF and lower LF power and lower LF/HF ratio than controls, independent of the epilepsy group, and did not show significant differences in any other autonomic index with respect to the two control groups. In RE, we found a negative relationship between both seizure load and frequency of sleep interictal EEG abnormalities with parasympathetic drive levels. These changes might be the expression of adaptive mechanisms to prevent the excessive sympathetic drive seen in patients with refractory epilepsies. PMID:22560190

Seri, Stefano; Di Lorenzo, Giorgio; Pisano, Tiziana; Pinci, Mariangela; Brazzo, Daniela; Betteridge, Heather; Cerquiglini, Antonella

2012-05-03

394

Autonomous microexplosives subsurface tracing system final report.  

SciTech Connect

The objective of the autonomous micro-explosive subsurface tracing system is to image the location and geometry of hydraulically induced fractures in subsurface petroleum reservoirs. This system is based on the insertion of a swarm of autonomous micro-explosive packages during the fracturing process, with subsequent triggering of the energetic material to create an array of micro-seismic sources that can be detected and analyzed using existing seismic receiver arrays and analysis software. The project included investigations of energetic mixtures, triggering systems, package size and shape, and seismic output. Given the current absence of any technology capable of such high resolution mapping of subsurface structures, this technology has the potential for major impact on petroleum industry, which spends approximately $1 billion dollar per year on hydraulic fracturing operations in the United States alone.

Engler, Bruce Phillip; Nogan, John; Melof, Brian Matthew; Uhl, James Eugene; Dulleck, George R., Jr.; Ingram, Brian V.; Grubelich, Mark Charles; Rivas, Raul R.; Cooper, Paul W.; Warpinski, Norman Raymond; Kravitz, Stanley H.

2004-04-01

395

A 16-element autonomous receiving array  

Microsoft Academic Search

An autonomous receiving array system has been designed, fabricated, and deployed at-sea for the collection of broadband underwater acoustic data. The system consists of a 16-element hydrophone array, a pressure case containing the data acquisition and disk storage hardware, and a mooring which includes floats for buoyancy, a RF-beacon and flasher, deep-sea batteries, and an acoustic release. The array cable

W. S. Hodgkiss; J. D. Skinner; R. A. Harriss

2003-01-01

396

Visual curb localization for autonomous navigation  

Microsoft Academic Search

Percept-referenced commanding is an attractive paradigm for autonomous navigation over long distances. Rather than relying on precise prior environment maps and self-localization, this approach uses high-level primitives that refer to environmental features. The assumption is that the sensing and processing system onboard the robot should be able to extract such features reliably. In this context, we present an algorithm for

R. Turchetto; R. Manduchi

2003-01-01

397

Autonomous navigation for BigDog  

Microsoft Academic Search

BigDog} is a four legged robot with exceptional rough-terrain mobility. In this paper, we equip {BigDog} with a laser scanner, stereo vision system, and perception and navigation algorithms. Using these sensors and algorithms, {BigDog} performs autonomous navigation to goal positions in unstructured forest environments. The robot perceives obstacles, such as trees, boulders, and ground features, and steers to avoid them

David Wooden; Matthew Malchano; Kevin Blankespoor; Andrew Howardy; Alfred A. Rizzi; Marc Raibert

2010-01-01

398

Employment Decisions Supporting Organizations of Autonomous Agents  

Microsoft Academic Search

A key aspect of organization is that one or more agents perform tasks at the direction of another, supervising, agent. We model a set of individual actors using intelligent agents. These agents self-interestedly choose products to produce and to consume. Our initially-identical autonomous agents self-interestedly form organizations, with the employing and employed agents performing separate value computations. Use of agents,

Foster Mcgeary; Keith Decker

2003-01-01

399

Autonomous fluid systems of the continental crust  

Microsoft Academic Search

The long-term studies of the fluid regime of endogenic processes that formed the continental earth’s crust have made it possible to reveal principal peculiarities in the global fluid transfer from the deep lithosphere to its upper layers, where they participated in the formation of the granite?gneiss layer [1]. Against the background of this global trend, different autonomous fluid systems were

F. A. Letnikov

2009-01-01

400

RFID-based autonomous mobile car  

Microsoft Academic Search

Radio Frequency Identification (RFID) system is looked upon as one of the top ten important technologies in the 20th century. Industrial automation application is one of the key issues in developing RFID. Therefore, this paper designs and implements a RFID-based autonomous mobile car for more extensively application of RFID systems. The microcontroller of Microchip PIC18F4550 is used to control the

Jen-Hao Teng; Kuo-Yi Hsiao; Shang-Wen Luan; Rong-Ceng Leou; Shun-Yu Chan

2010-01-01

401

Motion Control for Autonomous Car Maneuvering  

Microsoft Academic Search

This paper focuses on the control methods for autonomouspath following and parallel parking of a carlikevehicle. The methods developed are based on akinematic model of the vehicle. For the path following,a time parameterization of a given path is performed.The proposed control algorithm exponentially stabilizesthe motion of the vehicle to the desired feasible path.The autonomous parking is performed as a sequenceof

I. E. Paromtchik; C. Laugier; S. V. Gusev; S. Sekhavat

402

Autonomously motile catalytic nanomotors by bubble propulsion  

NASA Astrophysics Data System (ADS)

A bubble propulsion model based on catalyzed hydrogen peroxide decomposition and momentum change via O2 bubbles detaching from the catalytic surface is proposed to explain the autonomous motion of catalytic nanomotors. The propelling force closely depends upon the surface tension of the liquid as well as the bulk concentration of hydrogen peroxide, and the model predictions are supported by the experimental data of Pt-coated spherical silica microbead motors.

Gibbs, J. G.; Zhao, Y.-P.

2009-04-01

403

Adaptive setpoint control for autonomous underwater vehicles  

Microsoft Academic Search

In this paper, we propose an adaptive saturated proportional-derivative (SP-D) setpoint controller for autonomous underwater vehicles. The proposed controller does not require any knowledge of the inertia matrix, Coriolis and centripetal force, hydrodynamic damping, and parameters of the gravity and buoyancy forces. The structure of this setpoint controller is based on the SP-D feedback, plus an adaptive update law for

Y. C. Sun; C. C. Cheah

2003-01-01

404

Autonomous programmable DNA nanorobotic devices using DNAzymes  

Microsoft Academic Search

A major challenge in nanoscience is the design of synthetic molecular devices that run autonomously (that is, without externally mediated changes per work-cycle) and are programmable(that is, their behav- ior can be modified without complete redesign of the device). DNA-based synthetic molecular devices have the advantage of being relatively simple to design and engineer, due to the predictable secondary structure

John H. Reif; Sudheer Sahu

2009-01-01

405

Abnormal autonomic cardiovascular control in ankylosing spondylitis  

PubMed Central

OBJECTIVE—This study was aimed at assessing the contribution of the autonomic nervous system to adjustments of cardiovascular function in patients with ankylosing spondylitis (AS).?METHODS—In 18 AS patients (mean age: 34.9; mean disease duration: 6.4 years) and 13 healthy controls (mean age: 31.7) the changes of heart rate (HR) with deep breathing (E/I ratio) and standing up (30/15 ratio) were recorded. The slope of cardiac baroreflex, the times series of blood pressure and HR values upon lying and standing, and venous plasma concentrations of catecholamines were also analysed. Erythrocyte sedimentation rate (ESR), plasma C reactive protein (CRP) concentration and a clinical index (BASDAI score) were used to assess the degree of disease activity in patients.?RESULTS—In the standing patients, blood pressure was found to decrease progressively (p< 0.001). Furthermore, the patients with a BASDAI score > 5 had a higher heart rate than patients with a BASDAI score < 5 (p<0.02), and there was a trend for a similar difference when patients were classified according to their ESR and CRP. Plasma catecholamine concentrations and the E/I ratio were not different in patients from controls. The 30/15 ratio and the slope of the spontaneous baroreflex during standing were both lower in AS patients than controls (p< 0.01).?CONCLUSIONS—This study demonstrated a change in autonomic nervous system function of AS patients, with a decreased parasympathetic activity, as evidenced by higher HR and lower baroreflex slope. As these significant deviances were mainly observed in patients with more active (or more inflammatory) disease, the autonomic nervous system involvement could be related to the inflammatory process. This autonomic strain may be related to the cardiac involvement in AS patients.??

Toussirot, E.; Bahjaoui-Bouhaddi, M.; Poncet, J.; Cappelle, S.; Henriet, M.; Wendling, D.; Regnard, J.

1999-01-01

406

Security in an autonomic computing environment  

Microsoft Academic Search

System and network security are vital parts of any autonomic computing solution. The ability of a system to react consistently and correctly to situations ranging from benign but unusual events to outright attacks is key to the achievement of the goals of self-protection, self-healing, and self-optimization. Because they are often built around the interconnection of elements from different administrative domains,

David M. Chess; Charles C. Palmer; Steve R. White

2003-01-01

407

Autonomous Rendezvous and Docking Conference, volume 3  

NASA Astrophysics Data System (ADS)

This document consists of the presentation submitted at the Autonomous Rendezvous and Docking (ARD) Conference. The document contains three volumes: ARD hardware technology; ARD software technology; and ARD operations. The purpose of this conference is to identify the technologies required for an on orbit demonstration of ARD, assess the maturity of these technologies, and provide the necessary insight for a quality assessment of programmatic management, technical, schedule, and cost risks.

408

Autonomous Rendezvous and Docking Conference, volume 1  

NASA Astrophysics Data System (ADS)

This document consists of the presentation submitted at the Autonomous Rendezvous and Docking (ARD) Conference. It contains three volumes: ARD hardware technology; ARD software technology; and ARD operations. The purpose of this conference is to identify the technologies required for an on orbit demonstration of the ARD, assess the maturity of these technologies, and provide the necessary insight for a quality assessment of the programmatic management, technical, schedule, and cost risks.

409

Science Operations for Onboard Autonomous Rover Science  

NASA Astrophysics Data System (ADS)

Onboard autonomous science represents one means to balance the large amounts of scientific data that current and future rovers can acquire with the limited ability to download it to Earth. Several systems are under development to perform autonomous rover science. The use of such systems represents a departure from standard operations, which closely resemble batch tele-operation. It is important for the science operations team to understand the capabilities and limitations of the onboard system to effectively use the tool of autonomous onboard science to increase overall mission science return, however it is difficult for the science team to get a feel for the onboard system without hands on experience in an operational system setting. This past year, the OASIS (Onboard Autonomous Science Investigation System) team has been working with the SOOPS (Science Operations On Planetary Surfaces) task to investigate how science returns for surface missions can be improved through the use of science autonomy. A limited version of OASIS was tested at the system level. The test involved a high-fidelity software simulation of a rover exploring a remote terrain using realistic operational interfaces. By using the simulation environment it is feasible to run many more experiments than testing with physical rover. Further, the simulation environment combined with the integrated operational system provides situational awareness for the science operations team along with greater flexibility and control over experiments to help answer "what if" questions that can lead to identifying the most effective ways to use the onboard system. In the tests, OASIS applied predetermined criteria provided by the scientists to prioritize which data collected during a traverse to send home, given specified bandwidth constraints. In addition, rock summary information (which requires very little bandwidth) was returned and provided as both a table and a map to the science team. We discuss the results of these experiments.

Estlin, T.; Castano, R.; Haldemann, A. F.; McHenry, M.; Bornstein, B.; Gaines, D.; Burl, M.; Anderson, R. C.; Powell, M.; Shu, I.; Farr, T.; Nesnas, I.; Jain, A.; Judd, M.

2006-12-01

410

Autonomous Haulage Systems – Justification and Opportunity  

Microsoft Academic Search

\\u000a Driverless haulage trucks have recently been developed for open pit mines. To predict the benefits of an Autonomous Haulage\\u000a System (AHS), a deterministic\\/stochastic model has been created to compare AHS to a manual system by estimating benchmarked\\u000a Key Performance Indicators (KPIs) such as productivity, safety, breakdown frequencies, maintenance and labor costs, fuel consumption,\\u000a tire wear, and cycle times. As this

Juliana Parreira; John Meech

411

Neural speed control for autonomous road vehicles  

Microsoft Academic Search

In this paper a neural-network automotive speed controller is presented which works at low and at high speed-levels using throttle and brake control input. It can be used for autonomous intelligent cruise control including stop-and-go traffic situations. The network itself consists of a simple multilayer feedforward perceptron network. A special training method is used, where the neural network is trained

H. Fritz

1996-01-01

412

AUTONOMIC CHANGES IN BRAHMAKUMARIS RAJA YOGA MEDITATION  

Microsoft Academic Search

This report presents the changes in various autonomic and respiratory variables during the practice of Brahmakumaris Raja yoga meditation. This practice requires considerable commitment and involves concentrated thinking. 18 males in the age range of 20 to 52 years (mean 34.1 ± 8.1), with 5-25 years experience in meditation (mean 10.1± 6.2), participated in the study. Each subject was assessed

Shirley Telles; T. Desiraju

413

Autonomous Programmable Nanorobotic Devices Using DNAzymes  

Microsoft Academic Search

Abstract A major challenge in nanoscience is the design of synthetic molecular devices that run autonomously (that is, without externally mediated changes per work-cycle) and are programmable(that is, their behavior can be modified without complete redesign of the device). DNA-based synthetic molecular devices have the advantage of being relatively simple to design and engineer, due to the predictable secondary structure

John H. Reif; Sudheer Sahu

2007-01-01

414

Autonomous Navigation System Based on GPS  

Microsoft Academic Search

An autonomous navigation system based on GPS was developed. The system was composed of the under-controlling part and the\\u000a decision-making part; the two parts communicated with each other via wireless data transmission modules. The under-controlling\\u000a part included the ARM7 microprocessor, the wireless data transmission module, the GPS receiver and the mobile quadricycle.\\u000a The decision-making part included the laptop and the

Zhaoxiang Liu; Gang Liu

2007-01-01

415

Autonomous replication of plasmids in Mucor transformants  

Microsoft Academic Search

Evidence is presented for the autonomous replication of recombinant plasmids in Mucor circinelloides Leu+ transformants. Plasmids consisting of a unique fragment of Mucor DNA inserted into YRp17 or pBR322 (i) give a high frequency\\u000a of transformation (up to 7800 Leu+ transformants per ?g DNA), (ii) are mitotically unstable, (iii) can be reisolated in an unmodified form from uncut transformant\\u000a DNA,

Robyn van Heeswijck; Sankt Annie Plads

1986-01-01

416

The autonomic nervous system and personality.  

PubMed

In a sample of 35 male and 93 female undergraduate students (M(age) = 21.0, SD = 2.2), it was not possible to develop a meaningful scale to measure whether individuals have a dominant sympathetic division of the autonomic nervous system or a dominant parasympathetic division balance using the items in Plutchik and Conte's inventory measuring psychophysiological reactivity. Replicable sex differences in response to the items were identified which may merit further study. PMID:23045846

Lester, David

2012-08-01

417

Satellite autonomous navigation - Status and history  

NASA Astrophysics Data System (ADS)

A development history and current status evaluation are presented for satellite autonomous navigation, with attention to USAF programs centrally concerned with this field of satellite technology and a view to the prospective influence of the Strategic Defense Initiative on future developments of these technologies. Milestone achievements are noted to have been strapdown inertial measurement unit systems, strapdown star sensor systems, and the Unknown Landmark Tracker ('ULTRA') sensor development project.

Chory, M. A.; Hoffman, D. P.; Lemay, J. L.

418

Adaptive autonomous underwater vehicles for littoral surveillance  

Microsoft Academic Search

Autonomous underwater vehicles (AUVs) have gained more interest in recent years for military as well as civilian applications.\\u000a One potential application of AUVs is for the purpose of undersea surveillance. As research into undersea surveillance using\\u000a AUVs progresses, issues arise as to how an AUV acquires, acts on, and shares information about the undersea battle space.\\u000a These issues naturally touch

Stephanie Kemna; Michael J. Hamilton; David T. Hughes; Kevin D. LePage

419

Cooperative Control for Autonomous Air Vehicles  

Microsoft Academic Search

The main objective of this research is to develop and evaluate the performance of strategies for cooperative control of autonomous\\u000a air vehicles that seek to gather information about a dynamic target environment, evade threats, and coordinate strikes against\\u000a targets. The air vehicles are equipped with sensors to view a limited region of the environment they are visiting, and are\\u000a able

Kevin Passino; Marios Polycarpou; David Jacques; Meir Pachter; Yang Liu; Yanli Yang; Matt Flint; Michael Baum

420

Self-powered autonomous wireless sensor node using vibration energy harvesting  

Microsoft Academic Search

This paper reports the development and implementation of an energy aware autonomous wireless condition monitoring sensor system (ACMS) powered by ambient vibrations. An electromagnetic (EM) generator has been designed to harvest sufficient energy to power a radio-frequency (RF) linked accelerometer-based sensor system. The ACMS is energy aware and will adjust the measurement\\/transmit duty cycle according to the available energy; this

R. Torah; P. Glynne-Jones; M. Tudor; T. O'Donnell; S. Roy; S. Beeby

2008-01-01

421

WiFi localization and navigation for autonomous indoor mobile robots  

Microsoft Academic Search

Building upon previous work that demonstrates the effectiveness of WiFi localization information per se, in this paper we contribute a mobile robot that autonomously navigates in indoor environments using WiFi sensory data. We model the world as a WiFi signature map with geometric constraints and introduce a continuous perceptual model of the environment generated from the discrete graph-based WiFi signal

Joydeep Biswas; Manuela M. Veloso

2010-01-01

422

Multiple Objective Genetic Algorithms for Path-planning Optimization in Autonomous Mobile Robots  

Microsoft Academic Search

This paper describes the use of a genetic algorithm (GA) for the problem of offline point-to-point autonomous mobile robot path planning. The problem consists of generating “valid” paths or trajectories, for an Holonomic Robot to use to move from a starting position to a destination across a flat map of a terrain, represented by a two-dimensional grid, with obstacles and

Oscar Castillo; Leonardo Trujillo; Patricia Melin

2007-01-01

423

Intelligent Control and Planning of Autonomous Mobile Robots Using Fuzzy Logic and Multiple Objective Genetic Algorithms  

Microsoft Academic Search

This paper describes the use of a Genetic Algorithm (GA) for the problem of Offline Point-to-Point Autonomous Mobile Robot\\u000a Path Planning. The problem consist of generating “valid” paths or trajectories, for an Holonomic Robot to use to move from\\u000a a starting position to a destination across a flat map of a terrain, represented by a two dimensional grid, with obstacles

Oscar Castillo; Jose Soria; Hector Arias; Jose Blas Morales; Mirsa Inzunza

2007-01-01

424

Intelligent Control and Planning of Autonomous Algorithms Mobile Robots Using Fuzzy Logic and Genetic  

Microsoft Academic Search

problem of Offline Point-to-Point Autonomous Mobile Robot Path Planning. The problem consist of generating “valid” paths or\\u000a trajectories, for an Holonomic Robot to use to move from a starting position to a destination across a flat map of a terrain,\\u000a represented by a two dimensional grid, with obstacles and dangerous ground that the Robot must evade. This means that the

Julian Garibaldi; Azucena Barreras; Oscar Castillo

425

Cartography and Dead Reckoning Using Stereo Vision for an Autonomous Car  

Microsoft Academic Search

Our main objective in this paper is to perform a cartography of a road scene into a reference frame at rest, where 3D measurements delivered by on-board sensors serve as input. The main sensors of our autonomous vehicle are two CCD cameras. Their pictures are combined using stereopsis to generate 3D data. We need dead reckoning to properly associate 3D

Stefan K. Gehrig; Fridtjof J. Stein

1999-01-01

426

Dead reckoning and cartography using stereo vision for an autonomous car  

Microsoft Academic Search

Our main objective in the paper is to perform a cartography of a road scene into a reference frame at rest, where 3D measurements delivered by on-board sensors serve as input. The main sensors of our autonomous vehicle are two CCD cameras. Their pictures are combined using stereopsis to generate 3D data. We need dead reckoning to properly associate 3D

Stefan K. Gehrig; Fridtjof J. Stein

1999-01-01

427

An Autonomous Ray-Like Swimming Robot with IPMC Artificial Muscle  

Microsoft Academic Search

Ionic polymer-metal composite (IPMC) which is a flexible polymer actuator can work in water by applying low voltage (at most about 3(V)). By aligning IPMCs (16 strips for two fins) as the muscles we developed a ray-like swimming robot. A simple traveling wave input generates propulsion of the fins. For autonomous operation, miniaturization of the system is performed by developing

Masanori Yamamura; Kentaro Takagi; Zhi-Wei Luo; Kinji Asaka; Yoshikazu Hayakawa; Masaki Onishi; Shinya Hirano

428

Self-training cognitive preview control for autonomous vehicle path navigation  

Microsoft Academic Search

A description is given of a cognitive preview control strategy for autonomous-vehicle steering and cruise guidance by combining optimal preview control theory with rule-based perceptive cruise command generation. The authors also propose a self-training cognition procedure for determining a suitable perceptive schedule for cognitive cruise and steering control. The control yields humanlike driving action in path navigation. It is an

K. C. Cheok; N. K. Loh; H. X. Hu

1988-01-01

429

A double-blind atropine trial for active learning of autonomic function  

NSDL National Science Digital Library

This article describes a human physiology laboratory class measuring changes in autonomic function over time in response to atropine. Students use themselves as subjects, generating ownership and self-interest in the learning as well as directly experiencing the active link between physiology and pharmacology in people. The class is designed to concomitantly convey the importance of bias in experimentation by adopting a double-blind placebo-controlled approach.

Jeffrey Fry (University of Nottingham); Steven Burr (University of Nottingham)

2011-12-01

430

Self-powered autonomous wireless sensor node using vibration energy harvesting  

Microsoft Academic Search

This paper reports the development and implementation of an energy aware autonomous wireless condition monitoring sensor system (ACMS) powered by ambient vibrations. An electromagnetic (EM) generator has been designed to harvest sufficient energy to power a radio-frequency (RF) linked accelerometer-based sensor system. The ACMS is energy aware and will adjust the measurement\\/transmit duty cycle according to the available energy; this

431

Erythromycin induces supranormal gall bladder contraction in diabetic autonomic neuropathy.  

PubMed Central

Gall bladder motor function is impaired in some patients with diabetes. It has been suggested that the abnormalities of gall bladder motility are confined to those patients with autonomic neuropathy. Erythromycin, a motilin receptor agonist, causes gall bladder contraction in both normal subjects and patients with gall stones with impaired gall bladder emptying. The effect of erythromycin on gall bladder motility in seven patients with diabetes with an autonomic neuropathy, six patients with diabetes without autonomic neuropathy, and 17 normal subjects was studied using ultrasound. There was no significant difference in gall bladder fasting volume between the three groups, but the patients with diabetes with autonomic neuropathy had impaired postprandial gall bladder emptying compared with normal subjects (percentage emptied (SEM) 40 (10.3)% v 64 (2.8)%, p < 0.01) and those with autonomic neuropathy (48 (7.7)%, NS). Erythromycin produced a dramatic reduction in gall bladder fasting volume in patients with diabetes with an autonomic neuropathy, compared with either normal subjects or patients with diabetes without autonomic neuropathy (percentage reduction 62 (4.6)% in patients with autonomic neuropathy, v 37 (17.6)% in those without autonomic neuropathy, and 26 (7.3)% in the normal subjects, (p < 0.02) and returned gall bladder emptying to normal in all patients with impaired emptying. The pronounced effect of erythromycin in diabetic autonomic neuropathy suggests denervation supersensitivity and that the action of erythromycin on the gall bladder is neurally modulated.

Catnach, S M; Ballinger, A B; Stevens, M; Fairclough, P D; Trembath, R C; Drury, P L; Watkins, P J

1993-01-01

432

A concept for a supervised autonomous robot  

NASA Astrophysics Data System (ADS)

The paper describes work in progress at Thomson-CSF Systems Canada Inc. on the Mobile Servicing System (MSS) Autonomous Robotics Program. The main objective of this program is to define and plan the development of technologies required to provide a supervised autonomous operation capability for the Special Purpose Dexterous Manipulator (SPDM) on the Mobile Servicing System (MSS). In this paper, a telerobotics system concept is introduced and a summary of the system requirements is given. The development methodology as well as the concept for a supervised autonomous robot (telerobotics) are briefly explained. The functional and physical architectures of the telerobotics system are also provided. This system will be responsible for carrying out operations such as assembly and maintenance of the Space Station Freedom; loading / unloading from the shuttle; and retrieval and deployment of the shuttle, etc. The paper also investigates an operational scenario for maintenance of the Space Station Freedom and briefly describes the operational scenario for changing an orbital replacement unit (ORU) on the Mobile Servicing System. The functional responsibilities of the system components in order to implement the ORU change are outlined.

Kalaycioglu, S.

433

Hemicrania continua. Unquestionably a trigeminal autonomic cephalalgia.  

PubMed

Hemicrania continua (HC) is a well-known primary headache. The present version of the International Classification of Headache Disorders lists HC in the "other primary headaches" group. However, evidence has emerged demonstrating that HC is a phenotype that belongs to the trigeminal autonomic cephalalgias together with cluster headache, paroxysmal hemicrania (PH), and short-lasting, unilateral neuralgiform headache attacks with conjunctival injection and tearing. This is supported by a common general clinical picture - paroxysmal, fluctuating, unilateral, side-locked headaches located to the ocular, frontal, and/or temporal regions, accompanied by ipsilateral autonomic dysfunctions including for example, tearing and conjunctival injection. Apart from the remarkable clinical similarities, the absolute and incomparable effect of indomethacin in HC parallels the effect of this drug in PH, suggesting a shared core pathogenesis. Finally, neuroimage findings demonstrate a posterior hypothalamic activation in HC similarly to cluster headache, PH, and short-lasting, unilateral neuralgiform headache attacks with conjunctival injection and tearing. Taken together, data indicate that HC is certainly a type of trigeminal autonomic cephalalgia that should no longer be placed in a group of miscellaneous primary headache disorders. PMID:23573839

Vincent, Maurice B

2013-04-10

434

New solutions for autonomous control and navigation  

NASA Astrophysics Data System (ADS)

The most precise navigation systems are commonly based on at least 3 laser gyros and 3 mechanical accelerometers, based on moving or tensioned elements. Laser gyro's "dead zone" guides to existence of additive subsystems, and mechanical accelerometer accumulate the "error of zero" and does not measure during the free fall of an object. Here is found that dead zone on laser gyro characteristics is a result of the precession of momentum of pulse of ring baghron. The necessity of precise laser gyro tuning in Alert city, Canada, is discussed. The method to minimize the precession and to avoid the dead zone on the output characteristics is proposed. Therewith new solutions for autonomous control and navigation are discussed. Here is proposed the autonomous unit of sensors of irregular movement without moving parts and without ring laser resonators, disposed motionless on the object to be measured, based on unique unified 6 mini modules of the autonomous resonatory devices (ARD's). Another new solution could be computer 3D-mouse without pad and with 3 independent outputs for each axis of irregular movement, or the gear of control, which could be arranged in the marker or pen. ARD theory, the experiments and testing are discussed.

Melkoumian, Baghrat V.

2005-10-01

435

Surveillance sensor for autonomous wildfire detection  

NASA Astrophysics Data System (ADS)

Autonomous wildfire detection systems may help to reduce hazards resulting from large wildland fires. In many situations wildfires start in the duff below trees and shrubs, which are hidden from direct view by groundbased sensors overlooking forests and wildlands. Mid- and thermal infrared measurements only detect wildfires when the fire has become a crownfire, and, by then, it usually has developed into a large wildfire. Therefore, the early discovery of wildfires using groundbased, autonomous sensors should be performed by detecting smoke clouds rather than the heat of the fire, since smoke becomes earlier visible above the trees as a result of convection than the heat of the fire. A demonstration sensor is being developed to show the feasibility of an affordable system for autonomous wildland fire detection. The system is designed to minimize false alarms by simultaneously analyzing the temporal, spatial and spectral information in the acquired imagery. The groundbased sensor will be horizon scanning and will employ linear CCD's for better contrast sensitivity in three different spectral bands.

de Vries, Jan S.; Kemp, Rob A.

1993-11-01

436

Infant autonomic functioning and neonatal abstinence syndrome  

PubMed Central

Background Neonatal abstinence syndrome (NAS) expression is widely variable among affected infants and the reasons for this variability are largely unknown; mechanisms that predispose infants to NAS expression are not understood. It has been postulated that the regulatory problems of prenatally drug exposed infants are manifested in dysfunctional vagal regulation of autonomic processes. The current study examines whether cardiac vagal tone, an indicator of parasympathetic neuroregulation, provides a marker for autonomic dysregulation subsequently expressed as NAS in prenatally opioid-exposed newborns. Methods Heart period (HP) and cardiac vagal tone (V) were derived from electrocardiogram data collected from 64 methadone-exposed infants on postnatal days 1 and 3. The postpartum NAS course was assessed serially. Results Infants with lower V on day 1 had significantly higher NAS symptomatology on day 3. Boys had more severe NAS symptoms than girls through the first 4 days of life and, among infants receiving pharmacologic treatment for NAS, boys required longer treatment course and hospitalizations. Greater poly-drug exposure, detected through toxicology screening throughout pregnancy, and cocaine use in particular, were associated with lower V and shorter HP (faster heart rate) in newborns. Multiple regression models accounted for 25 to 35% of the variance in NAS symptoms and duration of hospitalization in methadone-exposed infants. Significant predictors included infant sex, SSRI/SNRI use, and cigarette smoking. Conclusions Results support the hypothesis of a biologic vulnerability of autonomic regulatory functioning in methadone-exposed infants and greater male infant vulnerability to maternal methadone use.

Jansson, Lauren M.; DiPietro, Janet A.; Elko, Andrea; Velez, Martha

2010-01-01

437

Frontal midline theta rhythm is correlated with cardiac autonomic activities during the performance of an attention demanding meditation procedure  

Microsoft Academic Search

Frontal midline theta rhythm (Fm theta), recognized as distinct theta activity on EEG in the frontal midline area, reflects mental concentration as well as meditative state or relief from anxiety. Attentional network in anterior frontal lobes including anterior cingulate cortex is suspected to be the generator of this activity, and the regulative function of the frontal neural network over autonomic

Yasutaka Kubota; Wataru Sato; Motomi Toichi; Toshiya Murai; Takashi Okada; Akiko Hayashi; Akira Sengoku

2001-01-01

438

Analytical Approach for Well-Being Assessment of Small Autonomous Power Systems With Solar and Wind Energy Sources  

Microsoft Academic Search

This paper presents a systematic analytical approach for the well-being assessment of small autonomous power systems (SAPSs) with wind and solar energy sources. The proposed technique accounts for the uncertainties associated with solar irradiance, wind speed, demand, and outages of various generating units. The impact of wind power fluctuation on the system stability is also assessed by limiting the wind

Dheeraj Kumar Khatod; Vinay Pant; Jaydev Sharma

2010-01-01

439

Economic evaluation of the dual mode CAES solution for increased wind energy contribution in autonomous island networks  

Microsoft Academic Search

Wind parks operating in autonomous island grids, such as those encountered in the Aegean Archipelago, face considerable wind energy curtailments, owed to the inability of local electricity networks to absorb the entire wind energy production. On the other hand, plans promoting the natural gas-based electricity generation in big islands (such as Crete) question the future of wind energy. To recover

D. Zafirakis; J. K. Kaldellis

2009-01-01

440

Intelligent User Interface for Enhancing Computer Generated Forces.  

National Technical Information Service (NTIS)

The DoD widely uses airborne computer generated forces (CGFs) in simulation environments however most CGFs are not autonomous or interactive enough to be directed naturally by a human controller. Full simulation capability requires detailed, doctrinally c...

B. Schricker B. Stensrud G. Taylor J. Maddox J. Montefusco

2008-01-01

441

[Autonomic neuropathies--diagnosis and evidence based treatment].  

PubMed

Among the few well-established techniques to diagnose autonomic dysfunction are head-up-tilt table testing, heart rate variability measurement and axon-reflex based sudomotor testing. Recent research focused on the development of novel techniques to assess autonomic function based on axon-reflex testing in both vasomotor and pilomotor nerve fibers. However, these techniques are clinically not widely used due to technical limitations and the lack of data on their utility to detect autonomic dysfunction in patients with neuropathy. The treatment of autonomic neuropathies should focus on the management of the underlying disease. In addition, symptomatic treatment of autonomic dysfunction should be provided in an individual patient-centered multimodal regimen that may incorporate both pharmacological and non-pharmacological strategies. The use of medication in autonomic dysfunction requires a careful risk-benefit assessment and should be individually adjusted based on both therapeutic success and occurrence of adverse effects. PMID:23860683

Siepmann, T; Penzlin, A I; Illigens, B M W

2013-07-16

442

Autonomic nervous system dysfunction in Parkinson’s disease  

Microsoft Academic Search

Opinion statement  Autonomic nervous system (ANS) dysfunction is common in Parkinson’s disease (PD), affects 70% to 80% of patients, and causes\\u000a significant morbidity and discomfort. Autonomic nervous system dysfunction symptoms in PD include sexual dysfunction, swallowing\\u000a and gastrointestinal disorders, bowel and bladder abnormalities, sleep disturbances, and derangements of cardiovascular regulation,\\u000a particularly, orthostatic hypotension. Autonomic nervous system dysfunction in PD may be

Theresa A. Zesiewicz; Matthew J. Baker; Mervat Wahba; Robert A. Hauser

2003-01-01

443

A Proposal of Autonomous Robotic Systems Educative Environment  

NASA Astrophysics Data System (ADS)

This work presents our experiences in the implementation of a laboratory of autonomous robotic systems applied to the training of beginner and advanced students doing a degree course in Computer Engineering., taking into account the specific technologies, robots, autonomous toys, and programming languages. They provide a strategic opportunity for human resources formation by involving different aspects which range from the specification elaboration, modeling, software development and implementation and testing of an autonomous robotic system.

Ierache, Jorge; Garcia-Martinez, Ramón; de Giusti, Armando

444

Plan-Based Control for Autonomous Soccer Robots (Preliminary Report)  

Microsoft Academic Search

Robotic soccer has become a standard “real-world” testbed for autonomous robot control. This paper presents our current views\\u000a on the use of plan-based control mechanisms for autonomous robotic soccer. We argue that plan-based control will enable autonomous\\u000a soccer playing robots to better perform sophisticated and fine tuned soccer plays. We present and discuss some of the plan\\u000a representations that we

Michael Beetz; Andreas Hofhauser

2001-01-01

445

Cognitive functioning in orthostatic hypotension due to pure autonomic failure  

Microsoft Academic Search

Psychophysiological science proposes close interactions between cognitive processes and autonomic responses, yet the consequences\\u000a of autonomic failure on cognitive functioning have not been documented. This pilot study investigates, for the first time,\\u000a the cognitive profile of 14 patients with Pure Autonomic Failure (PAF). Each patient was administered a comprehensive battery\\u000a of neuropsychological tests and neuroimaging investigation. A number of patients

Hannah C. Heims; Hugo D. Critchley; Naomi H. Martin; H. Rolf Jäger; Christopher J. Mathias; Lisa Cipolotti

2006-01-01

446

Navigation and slope detection system design for autonomous mobile robot  

Microsoft Academic Search

Autonomous mobile robot navigation is a hot research field in recent years. We design a four-tracked autonomous mobile robot with a main-controller based on ARM s3c2410 and sub-controller based on ATmega128. The navigation system consists of GPS, INS, ultrasonic and infrared sensors. The used of the GPS and inertial navigation system for autonomous mobile robot makes its navigation precision and

Boyu Wei; Junyao Gao; Kejie Li; Hu Chen

2009-01-01

447

Towards a Generic Autonomic Architecture for Legacy Resource Management  

Microsoft Academic Search

Half a decade has passed since the objectives and benefits of autonomic computing were stated, yet even the latest system\\u000a designs and deployments exhibit only limited and isolated elements of autonomic functionality. From an autonomic computing\\u000a standpoint, all computing systems – old, new or under development – are legacy systems, and will continue to be so for some\\u000a time to

Radu Calinescu

448

Model based vehicle detection and tracking for autonomous urban driving  

Microsoft Academic Search

Situational awareness is crucial for autonomous driving in urban environments. This paper describes the moving vehicle detection\\u000a and tracking module that we developed for our autonomous driving robot Junior. The robot won second place in the Urban Grand\\u000a Challenge, an autonomous driving race organized by the U.S. Government in 2007. The module provides reliable detection and\\u000a tracking of moving vehicles

Anna Petrovskaya; Sebastian Thrun

2009-01-01

449

Autonomic dysfunction in multiple sclerosis: cervical spinal cord atrophy correlates  

Microsoft Academic Search

Autonomic dysfunction has rarely been studied in patients suffering from multiple sclerosis (MS). Some hypotheses have concerned\\u000a the pathophysiology, especially with regard to a possible spinal cord origin. However, there have been no previous studies\\u000a on autonomic dysfunction in MS and spinal cord lesions. This study assessed the frequency of autonomic dysfunction (AD) in\\u000a MS and the correlation to spinal

Jérôme de Seze; Tanya Stojkovic; Jean-Yves Gauvrit; David Devos; Mohamed Ayachi; François Cassim; Thierry Saint Michel; Jean-Pierre Pruvo; Jean-Daniel Guieu; Patrick Vermersch

2001-01-01

450

Metatranscriptomic analysis of autonomously collected and preserved marine bacterioplankton.  

PubMed

Planktonic microbial activity and community structure is dynamic, and can change dramatically on time scales of hours to days. Yet for logistical reasons, this temporal scale is typically under-sampled in the marine environment. In order to facilitate higher-resolution, long-term observation of microbial diversity and activity, we developed a protocol for automated collection and fixation of marine microbes using the Environmental Sample Processor (ESP) platform. The protocol applies a preservative (RNALater) to cells collected on filters, for long-term storage and preservation of total cellular RNA. Microbial samples preserved using this protocol yielded high-quality RNA after 30 days of storage at room temperature, or onboard the ESP at in situ temperatures. Pyrosequencing of complementary DNA libraries generated from ESP-collected and preserved samples yielded transcript abundance profiles nearly indistinguishable from those derived from conventionally treated replicate samples. To demonstrate the utility of the method, we used a moored ESP to remotely and autonomously collect Monterey Bay seawater for metatranscriptomic analysis. Community RNA was extracted and pyrosequenced from samples collected at four time points over the course of a single day. In all four samples, the oxygenic photoautotrophs were predominantly eukaryotic, while the bacterial community was dominated by Polaribacter-like Flavobacteria and a Rhodobacterales bacterium sharing high similarity with Rhodobacterales sp. HTCC2255. However, each time point was associated with distinct species abundance and gene transcript profiles. These laboratory and field tests confirmed that autonomous collection and preservation is a feasible and useful approach for characterizing the expressed genes and environmental responses of marine microbial communities. PMID:21716310

Ottesen, Elizabeth A; Marin, Roman; Preston, Christina M; Young, Curtis R; Ryan, John P; Scholin, Christopher A; DeLong, Edward F

2011-06-30

451

Towards Autonomous Agriculture: Automatic Ground Detection Using Trinocular Stereovision  

PubMed Central

Autonomous driving is a challenging problem, particularly when the domain is unstructured, as in an outdoor agricultural setting. Thus, advanced perception systems are primarily required to sense and understand the surrounding environment recognizing artificial and natural structures, topology, vegetation and paths. In this paper, a self-learning framework is proposed to automatically train a ground classifier for scene interpretation and autonomous navigation based on multi-baseline stereovision. The use of rich 3D data is emphasized where the sensor output includes range and color information of the surrounding environment. Two distinct classifiers are presented, one based on geometric data that can detect the broad class of ground and one based on color data that can further segment ground into subclasses. The geometry-based classifier features two main stages: an adaptive training stage and a classification stage. During the training stage, the system automatically learns to associate geometric appearance of 3D stereo-generated data with class labels. Then, it makes predictions based on past observations. It serves as well to provide training labels to the color-based classifier. Once trained, the color-based classifier is able to recognize similar terrain classes in stereo imagery. The system is continuously updated online using the latest stereo readings, thus making it feasible for long range and long duration navigation, over changing environments. Experimental results, obtained with a tractor test platform operating in a rural environment, are presented to validate this approach, showing an average classification precision and recall of 91.0% and 77.3%, respectively.

Reina, Giulio; Milella, Annalisa

2012-01-01

452

Self-priming dielectric elastomer generators  

Microsoft Academic Search

Dielectric elastomer generators (DEG) in their present form are not suitable for autonomous power generation; they simply increase the amount of power that an electrical energy source can supply. They require a priming charge for each cycle, normally provided by an auxiliary power source but, due to charges being transferred to a load or depleted by system losses, the energy

Thomas McKay; Benjamin O’Brien; Emilio Calius; Iain Anderson

2010-01-01

453

Basilar artery aneurysm with autonomic features: an interesting pathophysiological problem  

PubMed Central

Unruptured cerebral aneurysms often present with neuro-ophthalmological symptoms but ocular autonomic involvement from an aneurysm of the posterior circulation has not previously been reported. A patient is described with a basilar artery aneurysm presenting with headache and unilateral autonomic symptoms. After angiographic coiling of the aneurysm there was a near complete resolution of these features. The relevant anatomy and proposed mechanism of autonomic involvement of what may be considered—from a pathophysiological perspective as a secondary trigeminal-autonomic cephalgia— is discussed??

Giffin, N; Goadsby, P

2001-01-01

454

Autonomic changes in Brahmakumaris Raja yoga meditation.  

PubMed

This report presents the changes in various autonomic and respiratory variables during the practice of Brahmakumaris Raja yoga meditation. This practice requires considerable commitment and involves concentrated thinking. 18 males in the age range of 20 to 52 years (mean 34.1 +/- 8.1), with 5-25 years experience in mediation (mean 10.1 +/- 6.2), participated in the study. Each subject was assessed in three test sessions which included a period of meditation, and also in three control (non-mediation) sessions, which included a period of random thinking. Group analysis showed that the heart rate during the meditation period was increased compared to the preceding baseline period, as well as compared to the value during the non-meditation period of control sessions. In contrast to the change in the heart rate, there was no significant change during meditation, for the group as a whole, in palmar GSR, finger plethysmogram amplitude, and respiratory rate. On an individual basis, changes which met the following criteria were noted: (1), changes which were greater during meditation (compared to its preceding baseline) than changes during post meditation or non-meditation periods (also compared to their preceding baseline); (2), Changes which occurred consistently during the three repeat sessions of a subject and (3), changes which exceeded arbitrarily-chosen cut-off points (described at length below). This individual level analysis revealed that changes in autonomic variables suggestive of both activation and relaxation occurred simultaneously in different subdivisions of the autonomic nervous system in a subject. Apart from this, there were differences in patterns of change among the subjects who practised the same meditation.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8244842

Telles, S; Desiraju, T

1993-09-01

455

Autonomic Imbalance and Borderline States of Thyrotoxicosis  

PubMed Central

Primary thyrotoxicosis may be regarded as having two main components—thyroid overactivity or dysfunction, and instability of the autonomic nervous system. Clinical observation suggests that the proportion of each component varies in individual cases. Results of treatment show that the larger the thyroid element the greater is the benefit of thyroidectomy or X-ray therapy, and the fewer the subsequent residual signs. When nervous instability predominates less relief is obtained by surgery or X-rays, and symptoms may be little changed or even made worse by the addition of hypothyroidism. Cases in which nervous instability predominates, with minimal thyroid dysfunction, have been termed “autonomic imbalance”, “neurocirculatory asthenia”, or “Basedow's disease with no thyrotoxicosis”. Thirteen such cases are described, all of which were females, with average age of 32 years. 9 had enlarged thyroids, 11 complained of palpitations, and 8 of excessive sweating. The basal metabolic rate, estimated in 8 cases, did not exceed +10%. There was some loss of weight in 6 cases, but in none was the appetite increased. The average diurnal pulse-rate did not exceed 95 and sleeping pulse was significantly lower. X-rays of heart, taken in 6 cases, were normal. Psychological troubles in 6 cases. Three cases treated by X-ray therapy and I surgically with no benefit. Remaining 10 cases treated medically with improvement. The group is ill-defined and requires further investigation of cause and treatment. The recognition of autonomic imbalance is important in order to avoid useless thyroidectomy or X-ray therapy, and encourage more extended use of psychotherapy. Investigation of its cause may yield information of value in the ætiological problem of thyrotoxicosis.

Martin, Laurence

1939-01-01

456

DC microgrid based distribution power generation system  

Microsoft Academic Search

This paper describes an autonomous-control method for a DC microgrid system having distribution power generators. This system consists of following five generation and control units; a solar-cell generation unit, a wind-turbine generation unit, a battery energy-storage unit, a flywheel power-leveling unit, and an AC grid-connected power control unit. The proposed control method intended for suppression of circulating current detects only

Y. Ito; Y. Zhongqing; H. Akagi

2004-01-01

457

Equivalence topologie des systemes dynamiques nonlineaires autonomes. (Topological equivalence of nonlinear autonomous dynamical systems).  

National Technical Information Service (NTIS)

We show in this paper that the autonomous nonlinear dynamical system (Sigma)(A,B,F): x' = Ax+Bu+F(x) is topologically equivalent to the linear dynamical system (Sigma)(A,B,O): x' = Ax+Bu if the projection of A on the complement in R(sup n) of the controll...

Nguyen Huynh Phan Tran Van Nhung

1995-01-01

458

Compromising algorithmicity and plasticity in autonomous agent control architectures : The autonomous cell  

Microsoft Academic Search

While algorithmic autonomous agent control architectures demonstrate high efficiency, they suffer from network structure rigidity that shows in the liability to crucial errors. On the other hand, the redundancy inherent i n most connectionist architectures allows for continuous s elf-organization that compensates for limited scale local neuron failures. In this article, we a re investigating the relation between algorithmicity and

Elpida Tzafestas

1995-01-01

459

Autonomous unmanned air vehicles (UAV) techniques  

NASA Astrophysics Data System (ADS)

The UAVs (Unmanned Air Vehicles) have great potentials in different civilian applications, such as oil pipeline surveillance, precision farming, forest fire fighting (yearly), search and rescue, boarder patrol, etc. The related industries of UAVs can create billions of dollars for each year. However, the road block of adopting UAVs is that it is against FAA (Federal Aviation Administration) and ATC (Air Traffic Control) regulations. In this paper, we have reviewed the latest technologies and researches on UAV navigation and obstacle avoidance. We have purposed a system design of Jittering Mosaic Image Processing (JMIP) with stereo vision and optical flow to fulfill the functionalities of autonomous UAVs.

Hsu, Ming-Kai; Lee, Ting N.

2007-04-01

460

Autonomous modular quantum systems: Contextual Jarzynski relations  

NASA Astrophysics Data System (ADS)

For autonomous quantum systems with modular structure we demonstrate that the Jarzynski relation can be reinterpreted to apply even locally: For this purpose certain contexts have to be introduced by selecting the system of interest versus its environment. The respective energy exchange is then divided into heat and work based on a generalized definition of these notions. In this way we are able to identify functional parts of the environment as either heat or work sources, respectively. We investigate different combinations of these functional parts with respect to contextual Jarzynski relations. Our analytical results are confirmed by numerical investigations on small multipartite systems.

Teifel, Jens; Mahler, Günter

2011-04-01

461

PRIMUS: autonomous driving robot for military applications  

NASA Astrophysics Data System (ADS)

This article describes the government experimental program PRIMUS (PRogram of Intelligent Mobile Unmanned Systems) and the achieved results of phase C demonstrated in summer 1999 on a military prooving ground. In this program there shall be shown the autonomous driving on an unmanned robot in open terrain. The most possible degree of autonomy shall be reached with today's technology to get a platform for different missions. The goal is to release the soldier from high dangerous tasks, to increase the performance and to come to a reduction of personnel and costs with unmanned systems. In phase C of the program two small tracked vehicles (Digitized Wiesel 2, airtransportable by CH53) are used. One as a robot vehicle the other as a command & control system. The Wiesel 2 is configured as a drive by wire-system and therefore well suited for the adaption of control computers. The autonomous detection and avoidance of obstacles in unknown, not cooperative environment is the main task. For navigation and orientation a sensor package is integrated. To detect obstacles the scene in the driving corridor of the robot is scanned 4 times per second by a 3D- Range image camera (LADAR). The measured 3D-range image is converted into a 2D-obstacle map and used as input for calculation of an obstacle free path. The combination of local navigation (obstacle avoidance) and global navigation leads to a collission free driving in open terrain to a predefined goal point with a velocity of up to 25km/h. A contour tracker with a TV-camera as sensor is also implemented which allows to follow contours (e.g. edge of a meadow) or to drive on paved or unpaved roads with a velocity up to 50km/h. In addition to these autonomous driving modes the operator in the command & control station can drive the robot by remote control. All the functions were successfully demonstrated in the summer 1999 on a military prooving ground. During a mission example the robot vehicle covered a distance of several kilometers in open terrain and on unpaved roads and performed a reconnaissance operation with the built-in RSTA- sensors. PRIMUS-C meets the requirements to drive autonomously and teleoperated in open terrain and on roads. The realized functions can be transfered to any vehicle and adapted to different mission requirements. This means that PRIMUS-C is a universal, modular and vehicle-independent platform for different military applications.

Schwartz, Ingo

2000-07-01

462

Achieving autonomous navigation in ground robotic vehicles  

NASA Astrophysics Data System (ADS)

A long-held dream for robotics researchers is the creation of vehicles that can move to a goal without human supervision, adapting as required to changing circumstances. While today"s ground robots are still far from achieving such complete autonomy, substantial progress has been attained. In this paper we describe the state-of-the-art in autonomous ground vehicle navigation as observed in the recently completed DARPA PerceptOR program, and we suggest new research directions where we see opportunities for leaps in performance.

Jackel, Lawrence D.; Fish, Scott; Krotkov, Eric P.; Perschbacher, Michael R.; Pippine, James

2004-12-01

463

Altered cardiac autonomic nervous function in depression  

PubMed Central

Background Depression is an independent risk factor for coronary artery disease. Autonomic instability may play a mediating or moderating role in this relationship; however this is not well understood. The objective of this study was to explore cardiac autonomic function and cardiac arrhythmia in depression, the correlation between depression severity and Heart Rate Variability (HRV) related indices, and the prevalence of arrhythmia. Methods Individuals (n?=?53) with major depression as assessed by the Diagnostic and Statistical Manual of Mental Disorders, who had a Hamilton Rating Scale for Depression (HAMD) score ?20 and a Zung Self-Rating Depression Scale score?>?53 were compared to 53 healthy individuals, matched for age and gender. Multichannel Electrocardiograph ECG-92C data were collected over 24 hours. Long-term changes in HRV were used to assess the following vagally mediated changes in autonomic tone, expressed as time domain indices: Standard deviation of the NN intervals (SDNN), standard deviation of 5 min averaged NN intervals (SDANN), Root Mean Square of the Successive Differences (RMSSD) and percentage of NN intervals?>?50 ms different from preceding interval (pNN50). Pearson’s correlations were conducted to explore the strength of the association between depression severity (using the SDS and HRV related indices, specifically SDNN and low frequency domain / high frequency domain (LF/HF)). Results The values of SDNN, SDANN, RMSSD, PNN50 and HF were lower in the depression group compared to the control group (P<.05). The mean value of the LF in the depression group was higher than the in control group (P<.05). Furthermore the ratio of LF/HF was higher among the depression group than the control group (P<.05). A linear relationship was shown to exist between the severity of the depression and HRV indices. In the depression group, the prevalence of arrhythmia was significantly higher than in the control group (P<.05), particularly supraventricular arrhythmias. Conclusions Our findings suggest that depression is accompanied by dysfunction of the cardiac autonomic nervous system, and further, that depression severity is linked to severity of this dysfunction. Individuals with depression appear to be susceptible to premature atrial and/or ventricular disease.

2013-01-01

464

Development of an Autonomous Pathogen Detection System  

SciTech Connect

An Autonomous Pathogen Detection System (APDS) is being designed and evaluated for use in domestic counter-terrorism. The goal is a fully automated system that utilizes both flow cytometry and polymerase chain reaction (PCR) to continuously monitor the air for BW pathogens in major buildings or high profile events. A version 1 APDS system consisting of an aerosol collector, a sample preparation subsystem, and a flow cytometer for detecting the antibody-labeled target organisms has been completed and evaluated. Improved modules are under development for a version 2 APDS including a Lawrence Livermore National Laboratory-designed aerosol preconcentrator, a multiplex flow cytometer, and a flow-through PCR detector.

Langlosi, S.; Brown, S.; Colston, B.; Jones, L.; Masquelier, D.; Meyer, P.; McBride, M.; Nasarabad, S.; Ramponi, A.J.; Venkatseswarm, K.; Milanovich, F.

2000-10-12

465

In vivo cell-autonomous transcriptional abnormalities revealed in mice expressing mutant huntingtin in striatal but not cortical neurons  

PubMed Central

Huntington's disease (HD), caused by a CAG repeat expansion in the huntingtin (HTT) gene, is characterized by abnormal protein aggregates and motor and cognitive dysfunction. Htt protein is ubiquitously expressed, but the striatal medium spiny neuron (MSN) is most susceptible to dysfunction and death. Abnormal gene expression represents a core pathogenic feature of HD, but the relative roles of cell-autonomous and non-cell-autonomous effects on transcription remain unclear. To determine the extent of cell-autonomous dysregulation in the striatum in vivo, we examined genome-wide RNA expression in symptomatic D9-N171-98Q (a.k.a. DE5) transgenic mice in which the forebrain expression of the first 171 amino acids of human Htt with a 98Q repeat expansion is limited to MSNs. Microarray data generated from these mice were compared with those generated on the identical array platform from a pan-neuronal HD mouse model, R6/2, carrying two different CAG repeat lengths, and a relatively high degree of overlap of changes in gene expression was revealed. We further focused on known canonical pathways associated with excitotoxicity, oxidative stress, mitochondrial dysfunction, dopamine signaling and trophic support. While genes related to excitotoxicity, dopamine signaling and  trophic support were altered in both DE5 and R6/2 mice, which may be either cell autonomous or non-cell autonomous, genes related to mitochondrial dysfunction, oxidative stress and the peroxisome proliferator-activated receptor are primarily affected in DE5 transgenic mice, indicating  cell-autonomous mechanisms. Overall, HD-induced dysregulation of the striatal transcriptome can be largely attributed to intrinsic effects of mutant Htt, in the absence of expression in cortical neurons.

Thomas, Elizabeth A.; Coppola, Giovanni; Tang, Bin; Kuhn, Alexandre; Kim, SoongHo; Geschwind, Daniel H.; Brown, Timothy B.; Luthi-Carter, Ruth; Ehrlich, Michelle E.

2011-01-01

466

Adult-onset autosomal dominant leukodystrophy without early autonomic dysfunctions linked to lamin B1 duplication: a phenotypic variant.  

PubMed

The early presentation of autonomic dysfunctions at the disease onset has been considered the mandatory clinical feature in adult-onset autosomal dominant leukodystrophy, which is a rarely recognised leukodystrophy caused by duplication of the lamin B1 gene. We report the first family with adult-onset autosomal dominant leukodystrophy and lamin B1 duplication, without the distinguishing early-appearing autonomic dysfunctions. Subjects from three consecutive generations of a multi-generational Serbian family affected by adult-onset autosomal dominant leukodystrophy underwent clinical, biochemical, neurophysiological, neuroradiological, and genetic studies. The patients atypically exhibited late autonomic dysfunctions commencing at the disease end-stages in some. Genetic findings of lamin B1 duplication verified adult-onset autosomal dominant leukodystrophy, which was supported also by neuroimaging studies. Exclusively, proton magnetic spectroscopy of the brain revealed a possibility of neuro-axonal damage in the white matter lesions, while magnetic resonance imaging of the spinal cord excluded spinal myelin affection as a required finding in this leukodystrophy. The detection of lamin B1 duplication, even when autonomic dysfunctions do not precede the other symptoms of the disease, proves for the first time that lamin B1-duplicated adult-onset autosomal dominant leukodystrophy may have a phenotypic variant with delayed autonomic dysfunctions. Prior to this report, such a phenotype had been speculated to represent an entity different from lamin B1-duplicated leukodystrophy. Hereby we confirm the underlying role of lamin B1 duplication, regardless of the autonomic malfunction onset in this disorder. It is the only report on adult-onset autosomal dominant leukodystrophy from Southeastern Europe. PMID:23681646

Potic, Ana; Pavlovic, Aleksandra M; Uziel, Graziella; Kozic, Dusko; Ostojic, Jelena; Rovelli, Attilio; Sternic, Nadezda; Bjelan, Mladen; Sarto, Elisa; Di Bella, Daniela; Taroni, Franco

2013-05-17

467

IMPACT OF PHARMACOLOGICAL AUTONOMIC BLOCKADE ON COMPLEX FRACTIONATED ATRIAL ELECTROGRAMS  

PubMed Central

Introduction The influence of the autonomic nervous system on the pathogenesis of complex fractionated atrial electrograms (CFAE) during atrial fibrillation (AF) is incompletely understood. This study evaluated the impact of pharmacological autonomic blockade on CFAE characteristics. Methods Autonomic blockade was achieved with propanolol and atropine in 29 patients during AF. Three-dimensional maps of the fractionation degree were made before and after autonomic blockade using the Ensite Navx® system. In 2 patients, AF terminated following autonomic blockade. In the remaining 27 patients, 20113 electrogram samples of 5 seconds duration were collected randomly throughout the left atrium (10054 at baseline and 10059 after autonomic blockade). The impact of autonomic blockade on fractionation was assessed by blinded investigators and related to the type of AF and AF cycle length. Results Globally, CFAE as a proportion of all atrial electrogram samples were reduced after autonomic blockade: 61.6±20.3% vs. 57.9±23.7%, p=0.027. This was true/significant for paroxysmal AF (47±23% vs. 40±22%, p=0.003), but not for persistent AF (65±22% vs. 62±25% respectively, p=0.166). Left atrial AF cycle length prolonged with autonomic blockade from 170±33 ms to. 180±40 ms (p=0.001). Fractionation decreases only in the 14/27 patients with a significant (>6ms) prolongation of the AF cycle length (64±20% vs. 59±24%, p=0.027), while fractionation did not reduce when autonomic blockade did not affect the AF cycle length (58±21% vs. 56±25%, p=0.419). Conclusions Pharmacological autonomic blockade reduces CFAE in paroxysmal AF, but not persistent AF. This effect appears to be mediated by prolongation of the AF cycle length.

Knecht, Sebastien; Wright, Matthew; Matsuo, Seiichiro; Nault, Isabelle; Lellouche, Nicolas; Sacher, Frederic; Kim, Steven J.; Morgan, Dennis; Afonso, Valtino; Shinzuke, Miyazaki; Hocini, Meleze; Clementy, Jacques; Narayan, Sanjiv M.; Ritter, Phillipe; Jais, Pierre; Haissaguerre, Michel

2010-01-01

468

Docosahexaenoic acid and cognitive function: Is the link mediated by the autonomic nervous system?  

PubMed Central

Docosahexaenoic acid is a long-chain polyunsaturated fatty acid that is found in large quantity in the brain and which has repeatedly been observed to be related in positive ways to both cognitive function and cardiovascular health. The mechanisms through which docosahexaenoic acid affects cognition are not well understood, but in this article, we propose a hypothesis that integrates the positive effects of docosahexaenoic acid in the cognitive and cardiovascular realms through the autonomic nervous system. The autonomic nervous system is known to regulate vital functions such as heart rate and respiration, and has also been linked to basic cognitive components related to arousal and attention. We review the literature from this perspective, and delineate the predictions generated by the hypothesis. In addition, we provide new data showing a link between docosahexaenoic acid and fetal heart rate that is consistent with the hypothesis.

Gustafson, Kathleen M.; Colombo, John; Carlson, Susan E.

2013-01-01

469

Collaborative tactical behaviors for autonomous ground and air vehicles  

NASA Astrophysics Data System (ADS)

Tactical behaviors for autonomous ground and air vehicles are an area of high interest to the Army. They are critical for the inclusion of robots in the Future Combat System (FCS). Tactical behaviors can be defined at multiple levels: at the Company, Platoon, Section, and Vehicle echelons. They are currently being defined by the Army for the FCS Unit of Action. At all of these echelons, unmanned ground vehicles, unmanned air vehicles, and unattended ground sensors must collaborate with each other and with manned systems. Research being conducted at the National Institute of Standards and Technology (NIST) and sponsored by the Army Research Lab is focused on defining the Four Dimensional Real-time Controls System (4D/RCS) reference model architecture for intelligent systems and developing a software engineering methodology for system design, integration, test and evaluation. This methodology generates detailed design requirements for perception, knowledge representation, decision making, and behavior generation processes that enable complex military tactics to be planned and executed by unmanned ground and air vehicles working in collaboration with manned systems.

Albus, James; Barbera, Anthony; Scott, Harry; Balakirsky, Stephen

2005-05-01

470

The usual treatment of trigeminal autonomic cephalalgias.  

PubMed

Trigeminal autonomic cephalalgias include cluster headache, paroxysmal hemicrania, and short-lasting unilateral neuralgiform headache attacks with conjunctival injection, tearing, and rhinorrhea (SUNCT). Conventional pharmacological therapy can be successful in the majority of trigeminal autonomic cephalalgias patients. Most cluster headache attacks respond to 100% oxygen inhalation, or 6?mg subcutaneous sumatriptan. Nasal spray of sumatriptan (20?mg) or zolmitriptan (5?mg) are recommended as second choice. The bouts can be brought under control by a short course of corticosteroids (oral prednisone: 60-100?mg/day, or intravenous methylprednisolone: 250-500?mg/day, for 5 days, followed by tapering off the dosage), or by long-term prophylaxis with verapamil (at least 240?mg/day). Alternative long-term preventive medications include lithium carbonate (800-1600?mg/day), methylergonovine (0.4-1.2?mg/day), and topiramate (100-200?mg/day). As a rule, paroxysmal hemicrania responds to preventive treatment with indomethacin (75-150?mg/day). A short course of intravenous lidocaine (1-4?mg/kg/hour) can reduce the flow of attacks during exacerbations of SUNCT. Lamotrigine (100-300?mg/day) is the preventive drug of choice for SUNCT. Gabapentin (800-2700?mg/day), topiramate (50-300?mg/day), and carbamazepine (200-1600?mg/day) may be of help. PMID:24090529

Pareja, Juan A; Alvarez, Mónica

2013-10-01

471

Organ transplantation in the Madrid Autonomous Region.  

PubMed

The Madrid Autonomous Region, a Spanish area with 6,200,000 inhabitants, has 7 hospitals authorized for organ transplantation, with 25 active programs for carrying out various transplantations: 18 for adults and 7 for children. Most of these hospitals are reference transplant centers for other Spanish regions. Between 715 and 760 transplantations are performed annually, which represents between 19% and 22% of Spanish activity. During 2007, 395 kidney, 220 liver, 55 heart, and 35 lung transplantations were performed, as well as 23 isolated or combination transplantations of other abdominal organs (pancreatic, intestinal, or multivisceral). Kidney, liver, heart, and children's intestinal transplant activity in 2007 represented 37%, 63%, 80%, and 100%, respectively, of all pediatric national activity. The Madrid Autonomous Region has a donation rate of 34.2 donors per million inhabitants. Of these, 30% are from non-heart-beating donors (NHBD), Maastrich criteria category 1 or 2. Various hospitals perform kidney, liver, and lung transplantations with these organs, representing 11% of the lung transplantations carried out in recent years, with this being a pioneer procedure worldwide. Despite the important transplant activity, we are working to increase donations, to improve organ donor detection and management protocols, as well as to reach a consensus on criteria to decrease the nonviability rates of potential transplant organs. PMID:19715902

Chamorro, C; Aparicio, M; Marmisa, G; Martinez-Urrialde, J L

472

Autonomic profile of subjects prone to fainting.  

PubMed

Syncope is the most common form of fainting that may occur at least once during a life-time in up to one-third of the general population. In 50% of patients the cause remains unknown. In an attempt to identify subtle disturbances of the autonomic nervous system, we examined 70 subjects, aged from 14 to 39 years, who suffered from recurrent neurally mediated syncope. We performed a battery of non-invasive tests assessing cardiovagal, sympathetic cholinergic and sympathetic adrenergic function. We compared the results with a group of 30 healthy, non-fainting subjects matched for age and sex. Basal records were similar in both groups. Patients had preserved cardiovagal function. The multivariate cluster analysis allowed us to find a homogeneous group of cases (46%) that simultaneously presented: greater fall in systolic and diastolic blood pressure after standing, increased 15:30 ratio, exaggerated absolute heart rate rise in response to standing and subclinical reduced sudomotor function in the foot. The results suggest the existence of a subclinical autonomic profile, with subtle sympathetic postganglionic impairment, evident in lower limbs. These findings may contribute to proving the existence of different types of neurally mediated syncope, all different in their onset and mechanism but with a common final manifestation: syncopal loss of consciousness. PMID:8926494

Ferrer, T; Pérez-Jiménez, A; Pérez-Sales, P; Alvarez, E; Ramos, M J

1996-01-01

473

Acceptance Criteria Framework for Autonomous Biological Detectors  

SciTech Connect

The purpose of this study was to examine a set of user acceptance criteria for autonomous biological detection systems for application in high-traffic, public facilities. The test case for the acceptance criteria was the Autonomous Pathogen Detection System (APDS) operating in high-traffic facilities in New York City (NYC). However, the acceptance criteria were designed to be generally applicable to other biological detection systems in other locations. For such detection systems, ''users'' will include local authorities (e.g., facility operators, public health officials, and law enforcement personnel) and national authorities [including personnel from the Department of Homeland Security (DHS), the BioWatch Program, the Centers for Disease Control and Prevention (CDC), and the Federal Bureau of Investigation (FBI)]. The panel members brought expertise from a broad range of backgrounds to complete this picture. The goals of this document are: (1) To serve as informal guidance for users in considering the benefits and costs of these systems. (2) To serve as informal guidance for developers in understanding the needs of users. In follow-up work, this framework will be used to systematically document the APDS for appropriateness and readiness for use in NYC.

Dzenitis, J M

2006-12-12

474

Lane detection system for autonomous vehicle navigation  

NASA Astrophysics Data System (ADS)

This paper represents the vision processing solution used for lane detection by the Insight Racing team, for DARPA Grand Challenge 2007. The problem involves detecting the lane markings for maintaining the position of the autonomous vehicle within the lane, at usable frame rate. This paper describes a method based on color interpretation and scanning based edge detection for quick and reliable results. First the color information is extracted from the image using RGB to HSV transform and mapped to the Munsell color system. Next, the regions of useful color are scanned adaptively to do an equivalent of single pixel edge detection in one stage. These edges are then processed using Hough Transform to yield lines, which are then segmented, grouped and approximated to reduce the number of lines representing straight and curved lane markings. The final lines are then numbered and sent to the master controller for each frame. This allows the master controller to pick the bounding lane markings and center the vehicle accordingly and navigate autonomously. OpenGL is used to display the results. The solution has been tested and is being used by Insight Racing team for their entry to the DARPA Grand Challenge 2007.

Bhatia, Amit

2007-09-01

475

[Autonomic neuropathy in diabetics, treatment possibilities].  

PubMed

Diabetic neuropathy is a chronic complication of diabetes. It involves non-inflammatory damage of the function and structure of peripheral nerves by metabolic vascular pathogenic processes. In case of affection of vegetative nerves (small non-myelinated C fibres) autonomic neuropathy develops. It is a relatively frequent form of neuropathy which remains for a long time without clinical symptoms and therefore is rarely diagnosed and treated. Manifestations of the affection are encountered in all organs which are supplied by vegetative nerves. The presence of this complication of diabetes is signalized by tachycardia at rest, deterioration of gastric evacuation, diabetic diarrhoea or constipation, erectile dysfunction, impaired function of the sweat glans or impaired pupillary reaction. The advanced form involves the danger of latent myocardial ischaemia, serious postural hypotension and sudden death. It increases significantly the mortality of the affected patients. Similarly as the treatment of other complication of diabetes, treatment of autonomic neuropathy is difficult. The objective of the present paper is to review contemporary therapeutic possibilities. An essential prerequisite remain efforts to achieve optimal compensation. The authors draw attention to the effect of alpha-lipoic acid which exerts a positive effect not only on subjective symptoms but also on the objective finding. The other mentioned drugs are used either only experimentally or for purely symptomatic treatment. PMID:12132356

Lacigová, S; Rusavý, Z; Cechurová, D; Jankovec, Z; Zourek, M

2002-06-01

476

Cardiac autonomic dysfunction in anabolic steroid users.  

PubMed

This study aimed to evaluate if androgenic-anabolic steroids (AAS) abuse may induce cardiac autonomic dysfunction in recreational trained subjects. Twenty-two men were volunteered for the study. The AAS group (n?=?11) utilized AAS at mean dosage of 410?±?78.6?mg/week. All of them were submitted to submaximal exercise testing using an Astrand-Rhyming protocol. Electrocardiogram (ECG) and respired gas analysis were monitored at rest, during, and post-effort. Mean values of VO2 , VCO2 , and VE were higher in AAS group only at rest. The heart rate variability variables were calculated from ECG using MATLAB-based algorithms. At rest, AAS group showed lower values of the standard deviation of R-R intervals, the proportion of adjacent R-R intervals differing by more than 50?ms (pNN50), the root mean square of successive differences (RMSSD), and the total, the low-frequency (LF) and the high-frequency (HF) spectral power, as compared to Control group. After submaximal exercise testing, pNN50, RMSSD, and HF were lower, and the LF/HF ratio was higher in AAS group when compared to control group. Thus, the use of supraphysiological doses of AAS seems to induce dysfunction in tonic cardiac autonomic regulation in recreational trained subjects. PMID:22257181

Maior, A S; Carvalho, A R; Marques-Neto, S R; Menezes, P; Soares, P P; Nascimento, J H M

2012-01-18

477

The prevalence of autonomic neuropathy in the primary glaucomas  

Microsoft Academic Search

The results of systemic autonomic nerve function studies in patients with closed-angle glaucoma and ocular hypertension are reviewed. Autonomic neuropathy has been demonstrated in 58% of patients with closed-angle glaucoma and 42% of ocular hypertensive subjects, with significantly increased prevalence in ocular hypertensives with narrow iridocorneal angles. The implications are discussed, with particular reference to the pathogenesis of raised intraocular

Charles V. Clark; Princess Alexandra Eye Pavilion

1990-01-01

478

Development of a low-cost autonomous oceanographic observation vehicle  

Microsoft Academic Search

This work proposes the development of a low-cost ocean observation vehicle. This vehicle, a hybrid between autonomous underwater vehicles (AUV) and autonomous surface vehicles (ASV) moves on the surface of the sea and makes vertical immersions to obtain profiles of a water column according to a pre-established plan. Its design means production costs are low and efficiency is increased. Also,

S. Gomariz; J. Prat; A. G. Ruiz; J. Sole; P. Gaya; J. Del Rio

2009-01-01

479

Sights and sounds of chaos [autonomous and nonautonomous circuits  

Microsoft Academic Search

The concept of chaos is introduced using actual circuit experiments. Several well-known chaotic circuits are used as vehicles to demonstrate the many phenomena associated with chaos. They are divided into two classes, autonomous and nonautonomous. For the simplest autonomous circuits the authors examine strange attractors, the Lorenz circuit, Lyapunov exponents, and fractals. For the simplest nonautonomous circuits they consider period-doubling,

L. O. Chua; R. N. Madan

1988-01-01

480

Efficient Training of Artificial Neural Networks for Autonomous Navigation  

Microsoft Academic Search

The ALVINN (Autonomous Land Vehicle In a Neural Network) project addresses the problem of training artificial neural networks in real time to perform difficult perception tasks. ALVINN is a backpropagation network designed to drive the CMU Navlab, a modified Chevy van. This paper describes the training techniques that allow ALVINN to learn in under 5 minutes to autonomously control the

Dean A. Pomerleau

1991-01-01

481

The role of autonomic neuropathy in diabetic foot ulceration  

Microsoft Academic Search

Five standard, non-invasive tests of cardiovascular, autonomic function were performed in each of four groups of 30 subjects: controls, group 1, diabetics without clinical evidence of neuropathy; group 2, diabetics with neuropathy, but without foot ulceration; group 3, diabetics with neuropathic ulceration of the foot. The results showed a significant impairment of autonomic function in diabetics without clinically demonstrable somatic

M E Ahmed; L Delbridge; L P Le Quesne

1986-01-01

482

Paroxysmal Autonomic Instability With Dystonia After Brain Injury  

Microsoft Academic Search

complication of severe brain injury is a syndrome of intermittent agitation, diapho- resis, hyperthermia, hypertension, tachycardia, tachypnea, and extensor posturing. To capture the main features of this syndrome, derived through literature review and our own case series, we propose the term paroxysmal autonomic instability with dys- tonia. We reviewed reports of autonomic dysregulation after brain injury and extracted essential features.

James A. Blackman; Peter D. Patrick; Marcia L. Buck; Robert S. Rust

2004-01-01

483

AUTONOMOUS ROVER REFLECTANCE SPECTROSCOPY WITH DOZENS OF TARGETS  

Microsoft Academic Search

Future planetary rovers will travel autonomously over the visible horizon where data collection se- quences cannot be scripted in advance. These rovers would benefit from an ability to autonomously iden- tify science targets and deploy sensors. We present an automatic method for measuring rocks using a VIS\\/NIR reflectance spectrometer and solar illumi- nation. Our approach leverages an automatic image- based

Francisco Calderon; David R. Thompson; David Wettergreen

484

Volitional Control of Autonomic Arousal: A Functional Magnetic Resonance Study  

Microsoft Academic Search

Electrodermal activity reflects autonomic sympathetic innervation of dermal sweat glands providing an index of emotion-related bodily states of arousal. Relaxation techniques, which are facilitated by external (bio)feedback of electrodermal activity, can be used by trained subjects to actively control bodily and emotional arousal. Biofeedback relaxation provides an experimental model to explore neural mechanisms contributing to emotional representations and intentional autonomic

Hugo D. Critchley; Raphael N. Melmed; Eric Featherstone; Christopher J. Mathias; Raymond J. Dolan

2002-01-01

485

A HumanLike Semi Autonomous Mobile Security Robot  

Microsoft Academic Search

The Mechatronics Group of the University of Waikato have developed a fleet of five mobile robots capable of autonomous operation. These robots are constructed to traverse a variety of terrains including farms, forests, underwater and smooth indoor surfaces. MARVIN (Mobile Autonomous Robotic Vehicle for Indoor Navigation) is designed to act as a security agent for indoor environments and consequently must

Dale A. Carnegie; Ashil Prakash; Chris Chitty; Bernard Guy

2004-01-01

486

RAVON -- A Robust Autonomous Vehicle for Off-road Navigation  

Microsoft Academic Search

This paper introduces the autonomous outdoor robot RAVON1 (see Figure 1) which is developed at Kaiserslautern University of Technology. The vehicle is used as a testbed to investigate behaviour-based strategies on motion adaptation, local- isation and navigation in rough outdoor terrain. At the current stage the vehicle features collision-free autonomous navigation along way points given in GPS coor- dinates.

Helge Schaefer; M. Proetzsch; K. Berns; Tim Braun

2006-01-01

487

Cooperative autonomous driving: intelligent vehicles sharing city roads  

Microsoft Academic Search

The paper presents the Intelligent Control System Laboratory's (ICSL) Cooperative Autonomous Mobile Robot technologies and their application to intelligent vehicles for cities. The deployed decision and control algorithms made the road-scaled vehicles capable of undertaking cooperative autonomous maneuvers. Because the focus of ICSL's research is in decision and control algorithms, it is therefore reasonable to consider replacing or upgrading the

JONATHAN BABER; JULIAN KOLODKO; TONY NOËL; MICHAEL PARENT; LJUBO VLACIC

2005-01-01

488

A discriminating feature tracker for vision-based autonomous driving  

Microsoft Academic Search

A new vision-based technique for autonomous driving is described. This approach explicitly addresses and compensates for two forms of uncertainty: uncertainty about changes in road direction and uncertainty in the measurements of the road derived in each image. Autonomous driving has been demonstrated on both local roads and highways at speeds up to 100 km\\/h. The algorithm has performed well

Henry Schneiderman; Marilyn Nashman

1994-01-01

489

Real-time indoor autonomous vehicle test environment  

Microsoft Academic Search

To investigate and develop unmanned vehicle systems technologies for autonomous multiagent mission platforms, we are using an indoor multivehicle testbed called real-time indoor autonomous vehicle test environment (RAVEN) to study long-duration multivehicle missions in a controlled environment. Normally, demonstrations of multivehicle coordination and control technologies require that multiple human operators simultaneously manage flight hardware, navigation, control, and vehicle tasking. However,

BRETT BETHKE; ADRIAN FRANK; DANIEL DALE; JOHN VIAN

2008-01-01

490

Safety Assessment of Autonomous Cars using Verification Techniques  

Microsoft Academic Search

A common requirement for autonomous cars is a safe locomotion which is evaluated by the method of hybrid verification applied online. The approach checks avoidance of static obstacles and dynamic traffic participants, which are described by imprecise data on their positions and velocities. The nonlinear dynamics of the autonomous car and other traffic participants is conservatively abstracted to Markov chains,

Matthias Althoff; Olaf Stursberg; Martin Buss

2007-01-01

491

Autonomous driving in a multi-level parking structure  

Microsoft Academic Search

Recently, the problem of autonomous navigation of automobiles has gained substantial interest in the robotics community. Especially during the two recent DARPA grand challenges, autonomous cars have been shown to robustly navigate over extended periods of time through complex desert courses or through dynamic urban traffic environments. In these tasks, the robots typically relied on GPS traces to follow pre-defined

Rainer Kümmerle; Dirk Hähnel; Dmitri Dolgov; Sebastian Thrun; Wolfram Burgard

2009-01-01

492

Simulated Visual Perception-Based Control for Autonomous Mobile Agents  

Microsoft Academic Search

Autonomous robots, such as automatic vacuum cleaners, toy robot dogs, and autonomous vehicles for the military, are rapidly becoming a part of everyday life. As a result the need for effective algorithms to control these agents is becoming increasingly important. Conventional path finding techniques rely on a representation of the world that can be analysed mathematically to find the best

Daniel Flower; Burkhard Wünsche; Hans W. Guesgen

2006-01-01

493

State Estimation Strategies for Autonomous Underwater Vehicle Fish Tracking Applications  

Microsoft Academic Search

Abstract As the largest unexplored area on earth, the underwater world has unlimited at- traction to marine scientists. Due to the complexity of the underwater environment and the limitations of human divers, underwater exploration has been facilitated by the use of submarines, Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs). In recent years, use of autonomous control systems being

Jun Zhou

2007-01-01

494

RPLLEARN: Extending an Autonomous Robot Control Language to Perform  

Microsoft Academic Search

In this paper, we extend the autonomous robot control and plan language RPL with constructs for specifying experiences, control tasks, learning systems and their parameterization, and exploration strategies. Using these constructs, the learning problems can be represented explicitly and transparently and become executable. With the extended language we rationally reconstruct parts of the AGILO autonomous robot soccer controllers and show

Michael Beetz; Alexandra Kirsch; Armin Muller

2004-01-01

495

Defining a common control language for multiple autonomous vehicle operation  

Microsoft Academic Search

Presents a communication and coordination approach associated with multiple autonomous systems operations. With the extension of autonomous operations to a heterogeneous group of vehicles and with the request from human operators for override control, the need for a common control language (CCL) to facilitate real-time control is critical. The primary goal is to establish a standard interface from one agent

Christiane N. Duarte; Barry Brian Werger

2000-01-01

496

DEVELOPMENT OF AGENT-BASED AUTONOMOUS ROBOTIC WHEELCHAIR CONTROL SYSTEMS  

Microsoft Academic Search

In this paper, the intelligent and agent-based autonomous robotic wheelchair controller is proposed. The proposed agent-based autonomous robotic wheelchair control system consists of the functions of path planning, navigation and obstacle avoidance. In this work, the A* algorithm is used to develop the path planning module; the fuzzy logic is used to develop the obstacle avoidance and comfortable wheelchair motion

CHUNG-HSIEN KUO; HSU-LUNG HUANG; MING-YIH LEE

2003-01-01

497

An intelligent (semi-)autonomous passenger transportation system  

Microsoft Academic Search

We describe the hardware design and the control and navigation system of a (semi-)autonomous robot vehicle whose primary task is the transportation of people in crowded public environments. The system was initially designed as a robotic wheelchair for elderly and disabled people, called the MAid (mobility aid for elderly and disabled people). One of MAid's core functions is deliberative autonomous

E. Prassler; J. Scholz; M. Strobel; P. Fiorini

1999-01-01

498

Autonomic Disturbance at Onset of Acute Myocardial Infarction  

Microsoft Academic Search

Of 74 patients seen within 30 minutes of the onset of acute myocardial infarction 68 (92%) had signs of autonomic imbalance. Excessive vagal activity was evident in 41 (55%) and there was sympathetic overactivity in 27 (36%). The high incidence of sudden death in the acute phase of a coronary attack probably results from the electrical imbalance caused by autonomic

S. W. Webb; A. A. J. Adgey; J. F. Pantridge

1972-01-01

499

Optimization of autonomous village electrification systems by simulated annealing  

Microsoft Academic Search

The electrification of remote villages by autonomous renewable power systems is often more economical than the extension of a utility electrical grid. Accurate cost comparisons between the two alternatives, however, have historically been hindered by an inability to simulate a lowest cost autonomous system. In this article, a computational tool is presented which employs the techniques of combinatorial optimization to

T. W Lambert; D. C Hittle

2000-01-01

500

Group Behavior Control for MARS (Micro Autonomous Robotic System)  

Microsoft Academic Search

We present the design of our small robot MARS (micro autonomous robotic system) and basic experiments of group behavior pattern. MARS is small mobile autonomous robot. The robot has sensors, battery and infrared light communication device. In addition, the robot can get programs from the host computer (programmable). We focus on group behavior design (cooperation, competition coordination etc.) to use

Toshio Fukuda; Hiroo Mizoguchi; Kousuke Sekiyama; F. Arai

1999-01-01